Monitoring and credibility of financial statement - Free Essay Example

Sample details Pages: 16 Words: 4873 Downloads: 3 Date added: 2017/06/26 Category Finance Essay Type Research paper Did you like this example? This chapter reviews previous studies related to the credibility of financial statement, market reaction, corporate governance and other monitoring mechanisms. In other words, it looks at how investors perceive the credibility of financial  statement report  and market reaction. Financial statement credibility has declined because accounting defects raise questions within the investment community about internal controls, management integrity, audit committee oversight, external auditor quality, etc. In existing academic literature, several determinants explain the investor reaction to financial statement report. This chapter discusses several literature related to financial credibility and stock price reaction, monitoring and credibility of financial statement. 2.2 Some study on financial reporting in Saudi Arabia Based on a sample of non-financial Saudi companies listed on the Saudi Stock Exchange, Naser and Nuseibeh (2003) assess the quality of information disclosed. They compare the extent of corporate disclosure before and after the creation of the SOCPA. They classify information disclosed in the annual reports into three main categories: mandatory, voluntary related to mandatory, and voluntary unrelated to mandatory disclosure. The results indicate a relatively high compliance with the mandatory requirements in all industries covered by the study, with the exception of the electricity sector. As for the voluntary disclosure, whether related or unrelated to mandatory disclosure, the analysis reveals that Saudi companies disclose information more than the minimum required by law. The level of voluntary disclosure, however, is relatively low. The analysis also shows that the creation of SOCPA has had little impact on corporate reporting in Saudi Arabia. Alsaeed, K. (2006) investigates the impact of several firm characteristics on the extent of voluntary disclosure. The results show that the mean of the disclosure index was lower than average. Also, it was found that firm size was significantly positively associated with the level of disclosure. The remaining variables, however, were found to be insignificant in explaining the variation of voluntary disclosure. Based on data collected via questionnaires, five user groups were selected to examine their attitudes towards companies annual financial statement in Saudi Arabia. Naser and Nuseibeh (2003) examine the usefulness of the annual report of Saudi joint stock companies. The subject groups were individual investors, institutional investors, financial analysts, bank credit officers, and government representatives. The analyses indicate that the user groups surveyed in the study rely mainly on information made directly available by the company and do not consult intermediary sources of corporate information in o rder to make informed decisions. The result is expected in a developing country like Saudi Arabia where there is a limited number of listed companies and where businesses and financial communities have many social and business links, resulting in relatively easy interaction between the user groups and related companies. In the same context, users may perceive some information sources to be important in an absolute term. In a Survey of five major user groups, namely individual investors, institutional investors, creditors, government officials and financial analysts (users of corporate annual reports in Saudi Arabia), Al-Razeen, and Karbhari (2004) examine the perceptions of the users of annual corporate reports. The focus is on the use and importance of the seven different sources of corporate information contained in Saudi annual reports. The result indicated that the balance sheet and the income statement are the most important sections of the annual report to most of the Saudi user groups. The board of directors report was found to be the least popular. Al-Sehali and Spear (2004) examine the decision relevance and timeliness of accounting earnings in Saudi Arabia during the 1995-1999 sample periods. The result shows that the publication of accounting earnings leads individual investors to revise their security holdings. However, this evidence is limited to cases where firms reported profit. Using a combination of mail questionnaires and semi-structured interviews, Haniffa, R. and M. Hudaib (2007) investigate if the business and social environment affect the perceptions of audit performance of users and auditors. The results further indicate the performance gap arises from four factors in the environment within which auditing is practiced: licensing policy, recruitment process, the political and legal structure and dominant societal values. Interview results reveal the influence of institutional and cultural settings on the audit expectations gap an d indicate that the inclusion of Islamic principles in auditing standards and the code of ethics would help reduce the expectations gap that exists in Saudi Arabia. Don’t waste time! Our writers will create an original "Monitoring and credibility of financial statement" essay for you Create order Table 1: Summary of previous studies examining Financial reporting in Saudi Arabia Year of study Author Variables used Result 2003 Naser, K. and R. Nuseibeh Type of information (mandatory vs.voluntary) and the effect of SOCPA creation on the level of accounting disclosure By using a sample of non-financial Saudi Companies listed on the Saudi Stock Exchange. The results of the analysis indicated a relatively high compliance with the mandatory requirements in all industries covered by the study, with the exception of the electricity sector. As for the voluntary disclosure, whether related or unrelated to mandatory disclosure, the analysis revealed that Saudi companies disclose information more than the minimum required by law. 2006 Alsaeed, K Firm size, debt, ownership dispersion, firm age, profit margin, return on equity, liquidity, industry type and audit firm sizeas well asthe extent of voluntary disclosure. The results show that the mean of the disclosure index was lower than average. Also, it was found that firm size was significantly positively associated with the level of d isclosure. The remaining variables, however, were found to be insignificant in explaining the variation of voluntary disclosure. 2003 Naser, K. and R. Nuseibeh The perception of seven groups(individual investors, institutional investors, financial analysts, bank credit officers, and government representatives) of the usefulness of the annual report The analyses indicate that the user groups surveyed in the study rely mainly on information made directly available by the company and do not consult intermediary sources of corporate information in order to make informed decisions. 2004 Al-Razeen The perception of five major user groups, namely individual investors, institutional investors, creditors, government officials, and financial analysts. The seven different sourcesof corporate information includethe board of directors report, the auditors report, the balance sheet, the income statement, the statement of retained earnings, cash flow statements and the notes t o the financial statements The study found that the balance sheet and the income statement are the most important sections of the annual report to most of the Saudi usergroups. The board of directors report was found to be the least popular. 2004 Al-Sehali and Spear the decision relevance and timeliness of accounting earnings It appears that the publication of accounting earnings leads individual investors to revise their security holdings. However, this evidence is limited to cases where firms reported profit. The empirical results further suggest that earnings are timely in terms of their association with security returns and that increasing the measurement interval significantly improves this association. The tests also show that positive and negative earnings have differential implications for the timeliness of accounting earnings. 2007 Haniffa, R. and M. Hudaib business and social environment factors and audit expectation gap The results further in dicate the performance gap arises from four factors in the environment within which auditing is practiced: licensing policy, recruitment process, the political and legal structure, and dominant societal values. 2.3 Agency theory and market reaction An agency relationship exists when a person or an agent is hired by a principal or owner to make decisions on behalf of the principal. Agency problem arises when the desires or goals of the principal and agent conflict and it is difficult or expensive for the principal to verify what the agent is actually doing. The problem here is that the principal cannot verify that the agent has behaved appropriately. The main focus of the theory in the agency relationship is the selection of appropriate governance mechanisms between principal and agents that will ensure an efficient alignment of principal and agent interests. Its goal is to ensure that agents serve the interests of the principals thereby minimizing agency costs. Agency relationship is used by Jensen (1986) to propose a theory which is widely known as Jensen free cash flow theory. According to Jensen, the free cash flow exists in a company when there are excess funds left over after taking into account all positive net present value projects. He argues that conflict of interest between shareholders and managers over the payout policies of these free cash flows could explain the stock price reaction. The theory predicts that stock prices will increase if there is an unexpected dividend payment or stock repurchase announcement and will decrease if an unexpected increase in demand for funds through equity offering is announced for companies experiencing positive free cash flows. The negative impact in stock price may be due to likelihood that management may misuse the funds which are under their control; as a result, the market gives a lower valuation of the companys shares. 2.4 Agency theory, financial credibility, and stock price reaction .    Agency problems in organizations result from the separation of ownership and control. As a result of this agency problem, managers have incentives to take actions that maximize shareholder wealth. The existence of such incentives reduces the credibility of the reported earnings numbers. External and internal controls are mechanisms to minimize these agency problems and to enhance the quality of reported earnings number. The absence of external and internal controls may result in reducing the credibility of financial reports. The impact of these monitoring mechanisms on the credibility of financial disclosures is likely to be proportional to the extent to which managers have incentives to distort these numbers. The existence of control system, that prevents or limits the degree of manipulation of accounting numbers that managers can engage in, will increase investor reliance on financial numbers, and hence, the greater the likelihood of establishing credibility in accou nting numbers. Financial accounting information is the product of corporate accounting and reporting systems that measures and publicly discloses audited data concerning the financial position and performance of publicly held firms. Financial accounting systems provide direct and indirect input to corporate control mechanisms by contributing to the information contained in stock prices. The credibility of financial reporting reduces the information asymmetry between corporate manager and stockholder, improves investors confidence and raises the stock prices .A share price reaction to the release of financial information is taken to indicate that the announcement has information content while a high association between financial information and share price or returns over an extended period of time indicates that information provided by the accounting system reflects information that is being used by the capital market and this information will come from a multitude of sources. Capital market research often involves examining relations between financial information and share prices or returns. Reactions of investors are evidenced by their capital market transactions. Favorable reactions to information are presumed to be evidenced by price increase in the particular security, whereas unfavorable reactions to information are evidenced by a price decrease. No price change around the time of the release of information implies the information release does not provide anything that is new. Researchers in this area have begun to examine whether the stock price reaction to earnings surprises is related to the quality of the reported earnings numbers. Imhoff and Lobo (1992) find that firms with low consensus in the analysts forecasts of earnings tend to have a low ERC. Although it is possible that high prior uncertainty about the underlying value of the firm would also increase the dispersion in forecasts, Imhoff and Lobo conclude that it is more likely to prox y for the noise in accounting measures than for any prior uncertainty about underlying cash flows. Dey (2005) mentions that despite the lack of rigorous empirical evidence, there appears to be a long standing assumption that good governance is conducive to greater financial reporting credibility, particularly among regulators and legislators. For example, SOA of 2002, states one of its primary objectives as that of restoring investor confidence in corporate disclosures by mandating several governance reforms. Even prior to SOX, the recommendations of the COSO of the Treadway Commission (1992) , the Public Oversight Board (POB) of the SEC proactive division of the AICPA (1988; 1995), the Cadbury Committee Report on Financial Aspects of Corporate Governance (1992), among others, implicitly assert that various features of governance increase the credibility of financial statements. 2.5 Monitoring and credibility of financial statement Jensen and Meckling (1976) define agency costs as the sum of monitoring costs, bonding costs and residual loss. Monitoring costs are expenditures paid by the principal to measure, observe and control agents behavior. Despite the existence of the agency problems and agency cost discussed, the modern corporation, with the diffused share ownership which leads to such conflicts, has continued to be popular amongst both corporate managers and outside investors alike. This could be attributed largely to the evolution of internal and external monitoring mechanisms which are aimed at controlling such problems. It should be noted that there does tend to be a degree of interaction between each type of mechanism within firms. A contradictory view of monitoring has been provided by Burkart, et al. (1997). They argue that too much will constrain managerial initiative. Optimal levels of monitoring managerial policies are specific to an individual firms contracting environment, (Himmelberg, et al., 1999). In the same context, critics of Cadbury (1992) have felt that this increased level of monitoring may act as a deterrent to managerial entrepreneurship. In relation to this, an argument has been provided by Himmelberg et al. (1999), that firms will tend to substitute various mechanisms depending on unobservable (to the econometrician) characteristics of the firms contracting environment. Since this contracting group varies dramatically from one firm to the next, what is optimal for one need not be optimal for others. Within this context, Agrawal and Knoeber (1996) argue that if one specific mechanism is utilized to a lesser degree, others may be used more, resulting in equally good decision making and performance. Denis and Sarin (1997) argue that effective monitoring will be restricted to certain groups or individuals. Such monitors must have the necessary expertise and incentives to fully monitor management, in addition, such monitors must provide a credible thre at to managements control of the company. Shleifer and Vishny (1997) point out that concentration of ownership is an effective form of monitoring as coordinating voting by small shareholders is a costly proposition. Additionally, they point to providers of debt capital as effective monitors since their preference for a specific course of action given mismanagement or default is generally written into debt covenants. Datta, et al. (1999) argue that banks, as insiders, have access to inside information whereas public must rely mostly on publicly available information. Because they have superior information, banks can provide more efficient monitoring which lowers the monitoring and bonding costs of other debt claimants. Certain aspects of monitoring may also be imposed by legislative practices. In the UK, companies are required to provide statements of compliance with the Cadbury (1992) and Greenbury (1995) reports on corporate governance. Non-compliance must be disclosed and explained, and the attention brought by statements of non-compliance will represent an additional source of monitoring. 2.5.1 Corporate governance and reporting quality Different theories (such as contract theory and agency theory) have been used to explain the role of corporate governance in increasing financial reporting quality by playing a crucial role in monitoring senior management. The notion of a separation of ownership and control implies a pathological condition carrying with it a presumption of the failure of market to supply a complete solution to managerial inefficiency and need for some form of regulatory intervention. There is the idea that there is a disciplinary gap in the modern public company because the shareholders fail to supervise management. From the perspective of contact theory, the members are not owners but simply one of several contracting parties supplying a factor of production, in their case, capital to joint enterprise since shareholders as preponderantly sophisticated financial institutions, would not be willing to provide capital other than on terms that adequately safeguard their interests. It can be assumed that the contractual process will result in the adoption of appropriate governance provisions from which outside intervention can only detract. Mangers who offer inadequate governance terms will suffer market penalties and hence they have an incentive to adopt controls that will be attractive to investors (Sheikh, and ReesÃÆ' ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒâ€šÃ‚ 1995). The design of mechanisms for effective corporate control to make managers act in the best interest of shareholders has been a major concern in the area of corporate governance and finance. From the perspective of agency theory in a corporation, the shareholders are the principals and the managers are the agents working on behalf of, and for the interests of, the principals. A well-developed market for corporate controls is needed to solve problems of market failures, moral hazards, asymmetric information, and incomplete contracts. Various governance mechanisms have been advocated which include monitoring by financial instit utions, prudent market competition, executive compensation, debt, developing an effective board of directors, markets for corporate control and concentrated holdings ( Bonazzi, and Islam (2007)). John and Senbet (1998) define corporate governance as the mechanism by which the stakeholders of a corporation exercise control over corporate insiders and management such that their interests are protected. Corporate governance therefore deals with the interests of stakeholders (which include parties like labor unions, consumer interests, etc). Corporate governance in this context is the control mechanism for efficient operation of a corporation on behalf of the stakeholder. According to Watts and Zimmerman (1986), corporate governance as a monitoring tool, has the ability to enhance the reliability of accounting earnings; and consequently, increase the informativeness of accounting earnings. Moreover, corporate governance helps investors by reducing the conflict of interest between managers and shareholders, enhancing the reliability of financial information and the integrity of the financial reporting process. Fama and Jensen (1983) argue that effective corporate boards would be composed largely of outside independent directors holding managerial positions in other companies. They argue that effective boards had to separate the problems of decision management and decision control. However, if the CEO was able to dominate the board, separation of these functions would be more difficult, and shareholders would suffer as a result. Corporate boards should act as monitors in disagreements amongst internal managers and carry out tasks involving serious agency problems A central problem in conducting an event study of the valuation effects of implementing corporate governance is that most implementation affects all firms in a country. However, Share price changes may reflect the implementation, but could also reflect other information. According to McColgan (2 001), effective corporate governance by company boards requires both good information provided by insiders and the will to act on negative information provided by outsiders. Vafeas (2000) examines whether the informativeness of earnings is proxied by the earnings returns relationship, varies with the fraction of outside directors serving on the board and board size. The results suggest that earnings of firms with the smallest boards are perceived as being more informative by market participants. Black and Khanna (2007) suggest that properly designed mandatory corporate governance reforms can increase share prices in an emerging market such as India. Dey (2005) finds that most aspects of corporate governance are significantly associated with the credibility of reported earnings for firms in highest agency cost group. Lee, et al. (2005) examines how listed Chinese companies governance practices affect domestic investors reaction to their earnings reports. Choi, Frye, and Yang (2008 ) find that firms with weak shareholder rights experienced positive abnormal returns when SOX was passed. Using data for a sample of Canadian firms in the years 2001-2004, Niu, (2006), examines the association between corporate governance mechanisms and the quality of accounting earnings. He used two measurements for quality of earnings: accounting-based measurement (earnings management) and the market-based measurement (earnings informativeness). The result demonstrates that overall governance quality is negatively related to the level of abnormal accruals and positively influences the return-earnings association. Klapper and Love (2004) stated that greater investor protection increases investors willingness to provide financing and should be reflected in lower costs and greater availability of external financing. This suggests that firms with the greatest needs for financing in the future benefit the most from adopting better governance mechanisms. 2.5.2 Internal control system According to The Public Company Accounting Oversight Board (PCAOB), auditing standard differentiates three levels of internal control deficiencies based on the severity of the deficiencies. Control deficiency exists when the design or operation of a control does not allow management or employees, in the normal course of performing their assigned functions, to prevent or detect misstatements on a timely basis. A significant deficiency is defined as a control deficiency, or combination of control deficiencies, that adversely affects the companys ability to initiate, authorize, record and process external financial data reliably in accordance with generally accepted accounting principles, such that there is more than a remote likelihood that a misstatement of the companys annual or interim financial statements that is more than inconsequential will not be prevented or detected. A material weakness is defined as a significant deficiency, or combination of the annual or interim financia l statements that will not be prevented or detected. Saudi corporate governance code section (9 G) requires public companies to include in each annual report the auditors and managements assessment on the effectiveness of the internal control system as a part of board of directors report. In relation to this, samples used consists of the companies that report internal control weaknesses under SOX 302 and SOX 404, companies that report an effective internal control system under SOX 404, for fiscal years 2001-2004. Bedard, et al., 2006, investigate the relation between the SOX, internal control requirements and earnings quality. The result indicates that internal control deficiencies have an effect on financial statement quality as measured by unexpected accruals. In univariate analysis, Ashbaugh et. al. (2005) find that firms that report internal control deficiencies have greater performance adjusted total abnormal accruals and abnormal working capital accruals. Gupta and Nayar (2007) examine whether such internal control weakness disclosures convey valuation-relevant information to the US equity markets. This issue is important because increasing disclosure requirements without any attendant effect on valuation would impose unnecessary deadweight costs on the shareholders of a company. Thus, to understand whether such disclosures about the effectiveness of a companys internal controls over financial reporting have any new information content, they studied a number of voluntary disclosures made by the SEC registrants in the very early days of the SOX implementation. They find that internal control weakness disclosures are associated with a negative stock price reaction, on average, indicating that such disclosures do indeed convey valuation-relevant information. However, Browna et al. (2008) mention that prior studies of internal control disclosures under the 2002 SOX provide limited evidence on the impact of internal control regulation on reporting qu ality. Moreover, there is no empirical evidence on the reporting quality effects of mandatory internal control reforms in non-U.S. environments. 2.5.3 Audit Quality The demand for auditing services arises from a desire to reduce the divergence of interests and information asymmetry between the owners (the principal) and mangers (the agent) in a principal agent relationship (Jensen, and Meckling, 1976). Managers can voluntarily increase the transparency of their actions by hiring independent auditors to monitor their behavior. As a result of the increase in the complexity of business structures, globalization activities and separation of fund providers from management, further assurance about the financial information provided by companies is expected from auditors. Controlling owners may employ different monitoring and bonding mechanisms to assure minority shareholders that their interests are protected. One of these monitorinig devices is extranal auditor. Recent research provides empirical evidence that high quality independent audits are used as monitoring and bonding mechanisms to alleviate agency costs (Fan and Wong, 2005). Teoh and Wo ng (1993) provide evidence that better quality auditors are associated with more credible financial reports, implying that high quality auditors give greater credibility and better quality to financial statements. By using a comprehensive sample of Joint stock companies audited by Arthur Andersen Co (AAC), in Saudi Arabia, Al-Abbas, 2007 examines whether the criminal indictment has resulted in losses suffered by stock prices of Andersens clients. The study reported no effect of this event on the returns. 2.5.4 Institutional ownership Institutional investors provide another monitoring instrument on managers; Chung et al. (2002) indicate that large institutional shareholdings deter mangers from practicing their discretion over accruals. Fisher (2007) indicates that Jensen and Mecklings 1976 classification of residual loss of wealth in summary, predicts that the management may not always restrict their investment activity to positive present value projects. When negative present value projects are selected (and conversely, when positive present value projects are rejected), shareholders suffer a loss of wealth. The theory predicts that this wealth loss is negatively associated with the effectiveness of the monitoring regime (by capital providers) at the time of the investment decision. Monks and Minow (1995) state that Institutional investors have the opportunity, resources, and ability to monitor, discipline, and influence managers of firms. Hotchkiss and Strickland (2003) find that abnormal trading volume and in creased variance at earnings announcements are related to the composition of institutional ownership. 2.5.2 Banks borrowing The relation between managers and shareholders is not the only contract that induces firms to manage accounting reports, for example, debt contracts also provide managers with such incentives, thus possibly reducing the reliability of reported accounting numbers. Banks are an important corporate governance mechanism. Banks screen loan applicants before establishing firm and bank relationships to minimize unfavorable selection problems. They also monitor borrowers after bank loans are made to minimize moral hazard problems. Bank loans are different from publicly placed debt because banks know more about a companys prospects than other investors do. Shleifer and Vishny (1997) state that despite a number of theoretical discussions about governance by banks, there is little empirical evidence of their role. Boscaljon and Ho (2005) suggest that commercial banks from quality lenders play an increased role in reducing information asymmetries in environments where there is greater econo mic uncertainty. Easterbrook (1984) argues that external capital market monitoring brought to companies by debt financing forces managers in value maximizing strategies, rather than personal utility maximization. Carey, et al. (1998) conclude that financial institutions in general are intensive monitors but, due to regulatory and reputational factors, compared to finance companies, banks lend to less risky firms. Martel and Padron (2006) show that the Spanish Stock Market reacts positively and significantly to debt issue announcements. Given that the announcement of a bank credit agreement conveys positive news to the stock market about the borrowing firms, James (1987) documents a positive stock price response for bank loan agreements. Managerial risk aversion will also affect the financial policy of the firm. Higher debt is expected to reduce agency conflicts; Jensen (1986) also argues that the existence of debt in the firms capital structure acts as a bonding mechanism for com pany managers. By issuing debt, rather than paying dividends, managers contractually bind themselves to pay out future cash flows in a way unachievable through dividends. Table 1: Summary of previous studies examining Corporate governance and other monitoring mechanisms with market reaction and financial quality Authors/ year Country IV DV result Jain and Rezaee (2006) USA Corporate governance, financial reporting quality, and audit quality. Accumulated abnormal return A positive  Ãƒâ€šÃ‚  abnormal  return  at the  time   of  several  legislative  events  that  increased  the  likelihood  of  the  passage of the Act.  Lee,et.al. (2005) China Corporate governance Investors reaction to their earnings reports. Investors in the domestically listed Chinese companies do seem to base their valuation decisions, at least in part, on these companies earnings reports. This was indicated by the significant relationship between unexpected earnings and cumulative abnormal returns. However, the hypothesized effects of governance practice/choice is, on the whole, not supported. Niu (2006) Canada Corporate governance Earning quality Empirical tests demonstrate that overall governance quality is negatively related to the level of abnormal accruals and positively influences the return-earnings association Black, and Khanna ,(2007) India Corporate governance reforms Firms Market Values They conclude that investors expected the Clause 49 reforms to benefit large firms, and likely also medium-sized firms. This suggests that properly designed mandatory corpor ate governance reforms can increase share prices in an emerging market such as India. Bhattacharyya and Rao (2005) India Corporate governance reforms volatility and returns The authors find insignificant results for volatility (volatility is lower post-adoption for both large and small firms, by similar amounts), and mixed results for returns (post-adoption returns are lower for the largest firms, but positive for a second set of large. Dey, A. (2005) USA Corporate governance Financial credibility Found that most aspects of corporate governance are significantly associated with the credibility of reported earnings for firms in highest agency cost group. Teoh and Wong (1993) USA Audit quality Credibility of reported earnings The result implies that high quality auditors give greater credibility and better quality to financial statements. Hotchkiss, E. S. and D. Strickland (2003) USA institutional investors trading behavio r The findings show that it is not only ownership by individuals versus institutional investors but more importantly the composition of institutional shareholders that effects stock price behavior around the release of corporate information. Bedard, J., S. Bryan, et al. (2006) USA internal control requirements earning quality The result shows that the absolute level of unexpected accruals increases in the year internal control deficiencies are disclosed. This is consistent with an increase in earnings quality. Boscaljon, B. and C. C. Ho (2005). Hong Kong, Korea, Taiwan, and Thailand bank loan announcements Uncertainty and information content Findings suggest that commercial banks from quality lenders play an increased role in reducing information asymmetries in environments where there is greater economic uncertainty.

Extrinsic Rewards And Its Motivation - 1092 Words

We live in a society in which people are believed to be motivated by highly energizing and engaging rewards such as pay, job security, benefits and working conditions, all of which are extrinsic rewards. According to Daniel Pink’s book Drive – The Surprising Truth About What Motivates Us, he writes that these extrinsic rewards are in fact not the best ways in which to obtain and maintain motivation. Pink gives a new perspective on motivation in the workplace; it is argued that human motivation is largely intrinsic and that the aspects of this motivation can be divided into autonomy, mastery, and purpose. Based on the extrinsic reward motivation theory, low financial compensation can hinder motivation and performance in your profession,†¦show more content†¦I had only the extrinsic motivator of money. This allowed me to show up every shift, despite my stress and nervousness of the job. Over time however, I became better and more confident at the job. The stress went away because I knew I was good at my job and that the swimmers were in good hands. I began to open up more since I was less worried about making a mistake. This allowed me to earn a promotion and soon I was teaching lessons to the babies and toddlers. Meeting great friends, having confidence in myself, and being able to spend my time at work interacting with the little kids all served as intrinsic motivators. I enjoyed my job a lot more despite only making slightly more money than I did when I started. When you are regularly receiving rewards with material things you will never learn how to motivate yourself with intrinsic rewards, such as joy or pride in the work. The value of the work will never be understood because completing it will not be seen as important. Drive states, â€Å"Rewarding an activity will get you more of it (pg. 70 chapter 2).†Although in this society most people believe rewards help motivate us, but I personally disagree. When thinking of intrinsic motivation, you feel a sense of achievement and accomplishment. I feel accomplished and satisfaction after I complete tasks such as reading, and exercising. When I think about swim lessons I found intrinsic rewards, such as accomplishing a task well, surprising myself out of my comfortShow MoreRelatedExtrinsic Rewards Are the Best Motivation to Drive Performance1900 Words   |  8 PagesExtrinsic rewards are the best motivation to drive performance Introduction With global competition increasing by the day, finding the key ingredients that will give an organisation an advantage that will lead to success is vital. It is widely accepted and supported heavily be research that a motivated workforce will lead to better organisational performance. The purpose of this paper is to analyse the drivers of motivation in reference to organisational performance. Specifically the analysisRead MoreMotivation - Extrinsic and Intrinsic1014 Words   |  5 Pagesï » ¿ ESSAY #2 Motivation: Extrinsic to Intrinsic Motivation is a key factor in determining business success or failure. Successful organizations relentlessly seek to operate with a clear understanding of employee needs , and develop specific focus’ on how to meet them. Two key theories in organizational motivation are expectancy theory and equity theory. Both theories focus on the outcomes of a given decision or system rather than on individual employee needs. The goal of both processRead MoreTypes of Motivation1118 Words   |  5 PagesMotivation is defined as the accumulation of different process which influence and direct our behavior to achieve a goal (Negussie, 2012). According to Deci, there are two broad classes of motivation, which are intrinsic motivation and extrinsic motivation. He states: â€Å"A person is intrinsically motivated if he performs an activity for no apparent reward except the activity itself. On the other hand, extrinsic motivation refers to the performance of an activity because it leads to exter nal rewardsRead MoreThe Effect of Extrinsic Reward on Helping Behavior 1109 Words   |  5 Pagesbe focusing on whether intrinsic motivation and extrinsic reward will have effects on helping behavior. Do people help others out genuinely because of good nature and self-fulfillment or because of the presence of reward? If extrinsic reward will increase people willingness to help people, what kind of reward will have the greatest effect? Before discussing further, it is better to understand what is intrinsic motivation and extrinsic motivation. Intrinsic motivation means the reason someone engageRead MoreIntrinsic vs Extrinsic Motivation Styles Essay683 Words   |  3 Pages2 Motivation: Intrinsic vs. Extrinsic Abstract Motivation is an inner drive or state that stimulates the individual in a particular direction or keeps them engaged in a certain activity. Motivation determines whether the person continues with the task at hand or not. There are two types of motivation; intrinsic and extrinsic. Intrinsically motivated individuals hold learning various types of course information in high regard without receiving any reward or reinforcement. In contrast, extrinsicallyRead MoreEssay on Intrinsic versus Extrinsic Motivation1327 Words   |  6 PagesIntrinsic versus Extrinsic Motivation Introduction The success of any business depends on the productivity and satisfaction of its employees. Employees need to be motivated to work. Motivation can be defined as the inner force that drives individuals to accomplish personal and organizational goals. Motivation can be either intrinsic or extrinsic. For an individual to be motivated in a work situation there must be a need, which the individual would have to perceive a possibilityRead MoreMechanisms Underlying Creative Performance : Employee Perceptions Of Intrinsic And Extrinsic Rewards1301 Words   |  6 PagesPerformance: Employee Perceptions of Intrinsic and Extrinsic Rewards for Creativity, the authors Yoon et al. (2015) investigates creative performance based on effects of intrinsic and extrinsic rewards and proposes employees’ dedication to creativity may possibly activate a psychological state in the connection between rewards and creativity. In order to detect the boundary conditions, such as nature of rewards and the task context, when the different types of rewards are triggered for creativity, the studyRead MoreMotivation of Employee in Lic1357 Words   |  6 Pages] Intrinsic and extrinsic motivation Motivation can be divided into two types: intrinsic (internal) motivation and extrinsic (external) motivation. Intrinsic motivation Intrinsic motivation refers to motivation that is driven by an interest or enjoyment in the task itself, and exists within the individual rather than relying on external pressures or a desire for reward. Intrinsic motivation has been studied since the early 1970s. Students who are intrinsically motivated are more likely to engageRead MoreThe Importance Of Motivation In Education1287 Words   |  6 Pages Motivation and rewards are very important concepts in an effective educational system. Motivation is the driving force a person has to carry out activities and behaviors. Meanwhile, rewards are the benefits that a person receives or hopes to receive in completing the action or behavior thus providing motivation. This is why rewards are often implemented in education in order to motivate students to learn. However, not all rewards are the same as they can be separated into two different categories:Read MoreIntrinsic and Extrinsic Motivation1083 Words   |  5 PagesMotivation Ken 1 Intrinsic and Extrinsic Motivation Literature Review AK 11 April 2013 Professor J. Losche PSY-432 Ken 2 Both intrinsic and extrinsic motivation help to fit psychological values and beliefs of an individual. Intrinsic motivation comes from the inside of an individual, such as the drive to do something. Extrinsic motivation comes from the outside factors, such as doing something for a reward. There are mixed emotions

Effects of Chlorinated Drinking Water free essay sample

Chlorine is added to drinking water, as a disinfectant, to get rid of harmful bacteria, which are usually present in areas from where the water is obtained. The controversy of this issue is that chlorination can work as an advantage or as a disadvantage to those consuming it. Chlorine is currently the most effective water treatment when compared with other alternatives. However, it also reacts with natural organic compounds present in the water to produce harmful chemicals that on a long-term basis are very dangerous. The most well known adverse effects of contaminated water is shown in the Walkerton crisis in May 2000, where an outbreak of E. Coli contamination occurred in the water system of Walkerton, Ontario. Seven people died, and a further 2300 fell ill after consuming water that was contaminated by farm manure (Walkerton Report, CBC 2008). This could have been prevented if proper chlorination had taken place. Examples of contaminants that chlorine eliminates are microbes such as E. We will write a custom essay sample on Effects of Chlorinated Drinking Water or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Coli, Salmonella typhi and Shigella. E. Coli grows when the water is contaminated with human and animal waste products. Upon consuming E. Coli contaminated water, an individual suffers from diarrhea, cramps, nausea, renal failure and sometimes even death. Consuming water contaminated with Salmonella typhi causes typhoid fever. Shigella causes severe abdominal cramping with blood and mucus in the stool. Chlorine’s major advantage is that the water remains disinfected until it reaches the point of consuming, unlike other disinfectants such as ozone or ultraviolet light. Chlorine not only purifies water, it also prevents bacterial growth, nitrogenous contaminants and such from growing in water pipes and storage tanks. It also gets rid of odors, unpleasant taste and organisms known as nuisance organisms. Slime bacteria, iron and sulfate reducing bacteria give the water a very unpleasant look and smell. These bacteria do not cause disease but chlorination gets rid of these organisms. Not only is chlorine easy to use, it is also widely available and of low cost. However, chlorine is also associated with producing harmful byproducts as it reacts with chemicals already present in water. These products are known as disinfection by-products. They include chloroform and are known as trihalomethanes or THMs for short. Studies conducted have shown that tested animals that are exposed to high amounts of THM are at a much greater risk for cancer. Even with humans, long-term exposure to chlorination can greatly increase risks of cancer (LaPure Water Inc, 2000). Also, chlorination does not get rid of all nitrate products. It only prevents the nitrates from reaching a toxic form. These nitrates are from manure products that have not been absorbed by plants. This is not particularly dangerous to adults, but with excess levels can cause â€Å"blue baby† disease (methemoglobinemia) in young infants (Nitrate: Health Effects in Drinking Water, McCasland). Chlorinated water also affects its taste and smell. Using chlorinated water to make coffee, tea, soups, etc changes its taste and smell. Even with these disadvantages, it is evident that the benefits of chlorination outweigh the risks. With proper treatment – making sure that chlorine is not added in excess and proper water testing, drinking water would be much healthier. The only major disadvantage of chlorinated water is the long-term effects of THMs. It is known that using a carbon filter actually gets rid of THMs and other chlorination by-products. People should be made aware of this and encouraged to use carbon filters to filter the water out instead of consuming straight from the tap. There are alternatives to chlorination as well, such as ozonation, which is a method of disinfection by adding ozone gas to water and applying an electric current. It is very effective against microbes and only forms by products, which can be removed with further treatment. Another method of disinfectant is by Ultraviolet light treatment. This method is effective against even more microbes than chlorine is but it is also costly. However, these methods can only be used as primary disinfectants, chlorine is required as a secondary disinfectant in order to disinfect water as much as possible. Also, these methods are temporary – the water does not remain disinfected until it reaches point of being consumed. In conclusion, chlorination is the most effective method of disinfecting water from drinking purposes. It’s the only method that keeps the water clean from the point of treatment to the point of consuming it. It is also the only disinfectant that is capable of minimizing all possible health risks caused by contaminated water. The adverse effects of chlorine such as its harmful by-products can be eliminated or reduced with the use of carbon filters. Effects of Chlorinated Drinking Water free essay sample Chlorine is added to drinking water, as a disinfectant, to get rid of harmful bacteria, which are usually present in areas from where the water is obtained. The controversy of this issue is that chlorination can work as an advantage or as a disadvantage to those consuming it. Chlorine is currently the most effective water treatment when compared with other alternatives. However, it also reacts with natural organic compounds present in the water to produce harmful chemicals that on a long-term basis are very dangerous. The most well known adverse effects of contaminated water is shown in the Walkerton crisis in May 2000, where an outbreak of E. Coli contamination occurred in the water system of Walkerton, Ontario. Seven people died, and a further 2300 fell ill after consuming water that was contaminated by farm manure (Walkerton Report, CBC 2008). This could have been prevented if proper chlorination had taken place. Examples of contaminants that chlorine eliminates are microbes such as E. We will write a custom essay sample on Effects of Chlorinated Drinking Water or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Coli, Salmonella typhi and Shigella. E. Coli grows when the water is contaminated with human and animal waste products. Upon consuming E. Coli contaminated water, an individual suffers from diarrhea, cramps, nausea, renal failure and sometimes even death. Consuming water contaminated with Salmonella typhi causes typhoid fever. Shigella causes severe abdominal cramping with blood and mucus in the stool. Chlorine’s major advantage is that the water remains disinfected until it reaches the point of consuming, unlike other disinfectants such as ozone or ultraviolet light. Chlorine not only purifies water, it also prevents bacterial growth, nitrogenous contaminants and such from growing in water pipes and storage tanks. It also gets rid of odors, unpleasant taste and organisms known as nuisance organisms. Slime bacteria, iron and sulfate reducing bacteria give the water a very unpleasant look and smell. These bacteria do not cause disease but chlorination gets rid of these organisms. Not only is chlorine easy to use, it is also widely available and of low cost. However, chlorine is also associated with producing harmful byproducts as it reacts with chemicals already present in water. These products are known as disinfection by-products. They include chloroform and are known as trihalomethanes or THMs for short. Studies conducted have shown that tested animals that are exposed to high amounts of THM are at a much greater risk for cancer. Even with humans, long-term exposure to chlorination can greatly increase risks of cancer (LaPure Water Inc, 2000). Also, chlorination does not get rid of all nitrate products. It only prevents the nitrates from reaching a toxic form. These nitrates are from manure products that have not been absorbed by plants. This is not particularly dangerous to adults, but with excess levels can cause â€Å"blue baby† disease (methemoglobinemia) in young infants (Nitrate: Health Effects in Drinking Water, McCasland). Chlorinated water also affects its taste and smell. Using chlorinated water to make coffee, tea, soups, etc changes its taste and smell. Even with these disadvantages, it is evident that the benefits of chlorination outweigh the risks. With proper treatment – making sure that chlorine is not added in excess and proper water testing, drinking water would be much healthier. The only major disadvantage of chlorinated water is the long-term effects of THMs. It is known that using a carbon filter actually gets rid of THMs and other chlorination by-products. People should be made aware of this and encouraged to use carbon filters to filter the water out instead of consuming straight from the tap. There are alternatives to chlorination as well, such as ozonation, which is a method of disinfection by adding ozone gas to water and applying an electric current. It is very effective against microbes and only forms by products, which can be removed with further treatment. Another method of disinfectant is by Ultraviolet light treatment. This method is effective against even more microbes than chlorine is but it is also costly. However, these methods can only be used as primary disinfectants, chlorine is required as a secondary disinfectant in order to disinfect water as much as possible. Also, these methods are temporary – the water does not remain disinfected until it reaches point of being consumed. In conclusion, chlorination is the most effective method of disinfecting water from drinking purposes. It’s the only method that keeps the water clean from the point of treatment to the point of consuming it. It is also the only disinfectant that is capable of minimizing all possible health risks caused by contaminated water. The adverse effects of chlorine such as its harmful by-products can be eliminated or reduced with the use of carbon filters. Effects of Chlorinated Drinking Water free essay sample Chlorine is added to drinking water, as a disinfectant, to get rid of harmful bacteria, which are usually present in areas from where the water is obtained. The controversy of this issue is that chlorination can work as an advantage or as a disadvantage to those consuming it. Chlorine is currently the most effective water treatment when compared with other alternatives. However, it also reacts with natural organic compounds present in the water to produce harmful chemicals that on a long-term basis are very dangerous. The most well known adverse effects of contaminated water is shown in the Walkerton crisis in May 2000, where an outbreak of E. Coli contamination occurred in the water system of Walkerton, Ontario. Seven people died, and a further 2300 fell ill after consuming water that was contaminated by farm manure (Walkerton Report, CBC 2008). This could have been prevented if proper chlorination had taken place. Examples of contaminants that chlorine eliminates are microbes such as E. We will write a custom essay sample on Effects of Chlorinated Drinking Water or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Coli, Salmonella typhi and Shigella. E. Coli grows when the water is contaminated with human and animal waste products. Upon consuming E. Coli contaminated water, an individual suffers from diarrhea, cramps, nausea, renal failure and sometimes even death. Consuming water contaminated with Salmonella typhi causes typhoid fever. Shigella causes severe abdominal cramping with blood and mucus in the stool. Chlorine’s major advantage is that the water remains disinfected until it reaches the point of consuming, unlike other disinfectants such as ozone or ultraviolet light. Chlorine not only purifies water, it also prevents bacterial growth, nitrogenous contaminants and such from growing in water pipes and storage tanks. It also gets rid of odors, unpleasant taste and organisms known as nuisance organisms. Slime bacteria, iron and sulfate reducing bacteria give the water a very unpleasant look and smell. These bacteria do not cause disease but chlorination gets rid of these organisms. Not only is chlorine easy to use, it is also widely available and of low cost. However, chlorine is also associated with producing harmful byproducts as it reacts with chemicals already present in water. These products are known as disinfection by-products. They include chloroform and are known as trihalomethanes or THMs for short. Studies conducted have shown that tested animals that are exposed to high amounts of THM are at a much greater risk for cancer. Even with humans, long-term exposure to chlorination can greatly increase risks of cancer (LaPure Water Inc, 2000). Also, chlorination does not get rid of all nitrate products. It only prevents the nitrates from reaching a toxic form. These nitrates are from manure products that have not been absorbed by plants. This is not particularly dangerous to adults, but with excess levels can cause â€Å"blue baby† disease (methemoglobinemia) in young infants (Nitrate: Health Effects in Drinking Water, McCasland). Chlorinated water also affects its taste and smell. Using chlorinated water to make coffee, tea, soups, etc changes its taste and smell. Even with these disadvantages, it is evident that the benefits of chlorination outweigh the risks. With proper treatment – making sure that chlorine is not added in excess and proper water testing, drinking water would be much healthier. The only major disadvantage of chlorinated water is the long-term effects of THMs. It is known that using a carbon filter actually gets rid of THMs and other chlorination by-products. People should be made aware of this and encouraged to use carbon filters to filter the water out instead of consuming straight from the tap. There are alternatives to chlorination as well, such as ozonation, which is a method of disinfection by adding ozone gas to water and applying an electric current. It is very effective against microbes and only forms by products, which can be removed with further treatment. Another method of disinfectant is by Ultraviolet light treatment. This method is effective against even more microbes than chlorine is but it is also costly. However, these methods can only be used as primary disinfectants, chlorine is required as a secondary disinfectant in order to disinfect water as much as possible. Also, these methods are temporary – the water does not remain disinfected until it reaches point of being consumed. In conclusion, chlorination is the most effective method of disinfecting water from drinking purposes. It’s the only method that keeps the water clean from the point of treatment to the point of consuming it. It is also the only disinfectant that is capable of minimizing all possible health risks caused by contaminated water. The adverse effects of chlorine such as its harmful by-products can be eliminated or reduced with the use of carbon filters.

The good design nuances of Colors magazine Essay Example For Students

The good design nuances of Colors magazine Essay The good design nuances of Colors magazine lend well to the Macsystems advert. Maybe this comes from the similar design goal that a magazine and advert share. Their functions are to clearly and effectively communicate information, whilst also to visualise an identity for itself. As a chief social function of design is to visualise the identity of institutions and audiences. To reiterate this point. Think about what the Macsystems advert would look like if it were redesigned with the Underworld/Tomato sleeve? The result for me would have been more interesting to look at. This would however detract from the adverts readability, making it harder to decode, ineffective as an informative advert and therefore a bad piece of design. Just because something looks interesting to look at doesnt mean its a good design. Deciding wether something is a good design or bad is a difficult thing. There are so many variables such as taste, current ideologies, social values and attitudes on design to bas e a decision. We will write a custom essay on The good design nuances of Colors magazine specifically for you for only $16.38 $13.9/page Order now Graphic design described by Ellen Lupton is a category encompassing any form of communication in which signs are scratched, carved, drawn, printed, pasted, projected, or otherwise inscribed onto surfaces. Graphic Design is utterly commonplace, appearing everywhere and produced by anyone. More people today have the potential to produce graphic design, than ever before, wether it be good or bad. Graphic design can be produced by anyone with access to computers with design applications, whether this be at home, school, college, university or the library. Anyone truly can use the technology, but not all can design with it. As a final piece of design, the Macsystems advert is defiantly much better. The success of redesigning something bad out of good in this way, really comes down to how appropriate the nuances of the good design are. Can we conclude that truly great pieces of design, are the ones that can be formulated and used universally. I dont think so, Graphic design can never be that simple. As the ideologies of society change, so does the effectiveness of design. Are the pieces of design that survive this change any better than the others? A single formula for great design can never exist. Graphic design is too diverse, with many languages and levels to communicate through. Graphic design doesnt have a Holy Grail. It can never exist because everything based on one formula would begin to look similar and so boring. Who would stand for it?

Description of Global Positioning System Device

Description of Global Positioning System Device Many computer technologies are useful in communication of data or information that is essential for decision making pertaining to specific issues or concerns. The major technologies that find relevancies in technical communication are Global Positioning System (GPS) device, MP3 player, waste electrical and electronic equipment, automobile jack, and camera phone. This paper gives a general description of GPS device to enlighten the general public and other interested professionals.Advertising We will write a custom essay sample on Description of Global Positioning System Device specifically for you for only $16.05 $11/page Learn More GPS is a radio-navigation system that is set in space and managed by the U.S. Department of Defense and Transportation. Image 1 shows the positions of the various satellites that constitute the GPS. It has been used for accurate determination of positions on the surface of the Earth (Combrink, Combrinck and Moraal 436). It was in itially invented as an enhancement system for the military forces and still serves this purpose as well as the others. Notwithstanding, it also has an adequate capacity to serve the civilian population in large numbers and variety of applications (Arnold, par. 16). According to Arnold (par. 17), the GPS is comprised of three fragments, namely, space fragment, control fragment and user fragment. The space fragment uses 24 satellites suspending in 6 orbital planes. Each satellite rotates around a 20,200km orbit which is inclined at 55 degrees, and completes the rotation in 12 hours. The configurations of the satellites in respective orbits are set in such a way that at least five are within the view of a user at any place on Earth in conjunction with Position Dilution of Precision (PDOP) of six satellites or less. PDOP is a quality measure of the relative configuration of the satellites as shown in figure 1. PDOP is inversely proportional to the degree of evenness in terms of spacing around the sky, so that the more evenly spaced the 24 satellite are, the lower PDOP is. It can be said to be perfect when a satellite situates overhead the user with other three satellites located at 1200 intervals just over the horizon from the user (Arnold, par. 18). Combrink et al. (436) assert that thousands of stationary and mobile receivers also constitute the GPS. Image 1. GPS constellation; expandable 24-slot configuration, as defined in SPS Performance StandardAdvertising Looking for essay on other technology? Let's see if we can help you! Get your first paper with 15% OFF Learn More (GPS Constellation (Expandable 24-slot configuration, as defined in SPS Performance Standard)) The decrease in precision defines a root mean square estimation of the affect that position solution geometry imposes on positions faults. The experts managing the system can assess geometry affects in four different positions, namely, time position (TDOP), 3-D position (PDOP) , vertical position (VDOP), and horizontal position (HDOP). Arnold (par. 19) points out that the GPS control fragment comprises 5 monitoring stations and 3 ground antennas, which transmit radio or other signals to receivers in the communication satellites in space or aircraft within the atmosphere. The monitoring posts adopt GPS receivers to track every satellite within its scope of view and collect assorted data from the satellites signals. The information dispatched from the various monitoring posts is processed at a larger station, Master Control Station (MCS), located in proximity to the Colorado Springs Colo. It is done to establish satellite clock and orbits profiles in order to update the navigational information of individual satellite. Image 2 a. GPS Block II/IIA Satellite. 2 b. Satellite operators at the MCS, Schriever Air Force Base (GPS Block II/IIA satellite and Satellite operators at the master control station, Schriever Air Force Base)Advertising We will writ e a custom essay sample on Description of Global Positioning System Device specifically for you for only $16.05 $11/page Learn More The user fragment of the GPS includes a range of integration and configurations architectures that encompass a receiver-pre-processor and an antenna to jointly receive and process navigational solutions to give a user positioning, velocity, and exact timing (Delaney 62). Arnold, James A. Surface Transportation and Global Positioning System Improvements: L5 and DGPS. Public Roads 61.4 (1998): 2. Academic Search Complete. Web. http://0-eds.b.ebscohost.com.aupac.lib.athabascau.ca/ehost/detail?sid=35d51614-ed5c-44bb-a7a3-b70236f42dca%40sessionmgr112vid=1hid=102bdata=JkF1dGhUeXBlPXVybCxpcCx1aWQmc2l0ZT1laG9zdC1saXZl#db=a9hAN=345976 Combrink, A. Z. A., W. L. Combrinck, and H. Moraal. Near Real-Time Detection of Atmospheric Water Vapour Using the SADC GPS Network. South African Journal of Science 100.9/10 (2004): 436-442. Academic Search Com plete. PDF file. 14 Feb. 2014. ascau.ca/ehost/pdfviewer/pdfviewer?sid=c9f6d8d9-fb93-45be-9bf2-03112b49735e%40sessionmgr113vid=1hid=102 Delaney, John. GPS: Yesterday and Tomorrow. PC Magazine 20.7 (2001): 62. Academic Search Complete. PDF file. 14 Feb. 2014. http://0-eds.b.ebscohost.com.aupac.lib.athabascau.ca/ehost/pdfviewer/pdfviewer?sid=13af7390-d31e-4162-9b49-11256c00bc8e%40sessionmgr115vid=1hid=102 GPS Block II/IIA satellite. 31 Jan. 2014. JPEG file. 14 Feb. 2014 gps.gov/multimedia/images/II-IIA.jpg. GPS Constellation (Expandable 24-slot configuration, as defined in SPS Performance Standard). 31 Jan. 2014. JPEG file. 14 Feb. 2014. gps.gov/multimedia/images/constellation.jpg. Satellite operators at the master control station, Schriever Air Force Base. 31 Jan. 2014. JPEG file. 14 Feb. 2014gps.gov/multimedia/images/2SOPS-crew.jpg.Advertising Looking for essay on other technology? Let's see if we can help you! Get your first paper with 15% OFF Learn More

Building a Houseâ€Advice From an Architect

Building a House- Advice From an Architect While your new house is an exciting and mind-boggling experience for you, it is routine for the builder (been there, done that). These attitudes often tend to clash. Building your new house should not (and cannot) be a passive exercise. A myriad of decisions have to be made  - by you. When you are unable or unwilling to make decisions, you force the builder to make them. To make sure your new home fulfills your own vision, follow the following guidelines. Understand Your Contract No matter what type of contract you sign, you become a party to a legal document involving a massive amount of money for the construction of your new house. By so doing, you abdicate none of your basic legal rights. Therefore, know your rights and exercise them. Start by reading the contract and understanding it. You are paying (or will pay over the next 25 to 30 years) for the knowledge of the builders: their experience and ability. Plus you are paying your builders a profit above their expenses. What do you expect in return? How do you ensure that you get what you expect? COMMUNICATE  - WRITE IT DOWN  - COMMUNICATE  - WRITE IT DOWN  - COMMUNICATE  - WRITE IT DOWN. Anything you add to the house after the contract is signed, the builder will keep track of  - assiduously! Anything you delete or reduce, YOU keep track of  - assiduously! Save on Building Costs The average house contains approximately 1,500 to 2,000 square feet. Do you need more space than that? Why? How much more? You pay for each and every square foot of space in your house, whether its occupied, usable, or otherwise. If the cost is $50, $85, or $110 per square foot, extra, unused, vacant, and unnecessary areas are provided at the very same cost. You want to be in control of building costs, but you dont want to skimp. Keep costs in perspective; for example, that cost of $10-per-thousand more for a brick you really like translates into a total cost of only $100 more when a typical amount of 10,000 bricks is involved. Do the math yourself. Be smart. Take care that glitz and gadgets suggested by friends, the builder, or magazines do not overwhelm good basic construction. Dont trade them for lesser construction. Bouncy floors where joists are stretched to the maximum are not remedied by a hot tub, flocked wallcovering, skylights, or jazzy door hardware. Know what you like. Check Building Codes Dont expect to control the number of nails used. Do expect a substantially built house, free of defects, and in accord with all applicable codes and regulations. Require proof of such compliance (many jurisdictions issue Certificates of Occupancy) at the closing of your mortgage. This indicates accord with the minimum code and safety standards. Realize that some things are virtually unchangeable; they should be done properly, first off. This includes a properly sized and constructed foundation system, a properly designed and installed structural system, and so on. Changeable items such as finishes and coverings should not distract you from watching for and requiring good basic construction. Watch for things that are not necessarily what you want and that you will not be able to change easily or cheaply. Question things that just dont look or seem right. Most of the time they indeed are not. Seek some reliable outside, impartial advice- other than your father, even if he is a builder! Be Flexible Be ready and prepared to compromise in order to resolve situations and problems. Be aware, however, of what you may be giving up in this process;  examine and understand both sides. Is the situation worth what you are losing? The builder is fully capable of doing anything or finding someone who can do anything you wish, but anything always comes with a price. Be careful and wary of unique, inordinate, or far-out requests, new technology, and untested materials and equipment. Understand that construction is an imperfect science. Combine that understanding with natural elements (e.g., site conditions, weather, wood members, human foibles), and you might face situations where things could change, must be changed, or simply exceed capabilities. Flat-out errors do happen. Absolute perfection or your idea of perfection may not- and more than likely, will not- be achieved. Drastic imperfections, however, can be corrected, and they should be. It is within your rights to require this. Keep Records Issues not clearly and specifically noted, written, described, or shown will be interpreted by both sides. A meeting of minds must take place, where interpretations are fully understood and resolved. When this resolution does not happen, expect dispute, confrontation, pique, anger, frustration, and perhaps even litigation. Be redundant,  leaving nothing to chance. Follow up verbal discussions and instructions with written verification. Keep records and receipts; records of phone calls and all correspondence; samples you approve; sales slips; model, type, and style numbers; and the like. Dont allow yourself to be reduced to buying any aspect of a pig in a poke. The more time and effort spent up front in programming, planning, designing, and understanding, as well as in establishing specifics of the project, the better the chance for a smoother construction period and a satisfactory result. Be Businesslike Be pragmatic and absolutely businesslike in all of your dealings with the builders. They are working for you; you are not seeking them as new friends. If a friend or relative performs part of the work, treat that person in exactly the same manner:  have a contract and demand adherence to your schedule. Dont let a gift or a good price disrupt the project overall. Summary of Questions to Ask What is a good design for our needs?What is a building code? Does it affect us? How does it work? What doesnt it do?Who is responsible, overall, for my building project?What are good sizes and proportions for rooms? What style do I want?What am I really getting from the builder?What problems do I have in my current house that I dont want to repeat?Where can I find answers and help? How do I make my desires known?What does that line on the drawing mean?What is a dispute? What is a lien?What are specifications? Does the builder write and provide them?What if my builder does something in a way I dont like? Is the house going to be complete? Will something be left out?When will the house be finished?What is a contract? How do I play a part in it? What does it say?What is an extra?Is that a good material? Ive never heard of it.Can I change things?Who picks the color of the paint, wall coverings, tile, type of wood, siding?Is landscaping included and what form does it take? Sod? Seed? Mud and rocks? Slopes? Are landscape features guaranteed? What if I disagree with the builder? Can I stop the work?Am I allowed on the job site? Can I inspect the work as it goes up? Can I bring someone with me?I really want this xyz in the house. How do I get exactly that?I can buy the light fixtures from my brother, but who will hang them? What do I do?Should I close on the mortgage and pay the builder in full? I have several items that I dont like. Must I still close?Why do we have to make all these trips to pick things out? About the Author, Ralph Liebing Ralph W. Liebing (1935–2014) was a registered architect, a lifelong teacher of code compliance, and the author of 11 books on architectural drawings, codes and regulations, contract administration, and the construction industry.   A 1959 graduate from the University of Cincinnati, Liebing taught at the University of Cincinnati School of Architecture and the College of Applied Science Technology at Illinois State University. In addition, he trained carpenters union apprentices, directed classes at community education programs, and taught architectural technology for Daytons ITT Technical Institute. He practiced architecture in both Ohio and Kentucky. Liebing published many textbooks, articles, papers, and commentaries. He was a fierce advocate for not only enforcing specifications and codes but for design firms to engage owners in the process.  His publications include Construction of Architecture: From Design to Built, Architectural Working Drawings; and The Construction Industry. In addition to being a Registered Architect (RA), Liebing was a Certified Professional Code Administrator (CPCA), Chief Building Official (CBO), and a Professional Code Administrator. Ralph Liebing was a pioneer in creating useful, professional web content of lasting quality.

Leadership Analysis Essay Example | Topics and Well Written Essays - 750 words

Leadership Analysis - Essay Example This happens to be the informal power structure that might at times demonstrate as exercising extreme influence compared to the formal one (Miller, 2008). Any chief nursing officer exercising formal power in a health care centre tends to apply it on a day to day basis within the process of performing its work (Fairholm, 2009). However, the informal normally apply it when it fits their own interest. This leaves a person wondering what this thing called power refers to; apparently, this is a person’s control or influence on the behavior of other persons with or without their approval (Fairholm, 2009). In other words, this is the ability of having a say within organizational doings directly or indirectly, thereby serving the interests of an individual or a group (Miller, 2008). Therefore, power happens to be an inherent element in any health care, which features significantly within the process of decision making. Owing to their work relationships, some chief nursing officers are capable of exercising excessive level of power of their formal job description (Morgan, 2006). Health care centers normally have an organizational chart listing the relationship, as well as ranks of positions in the organization (Fairholm, 2009). ... nts, charisma and characteristics of the health care center’s individual members thus becoming the informal heads of the organization (Miller, 2008). In this case, they tend to play a significant task in the efficacy of the health care, since they might at times exert more power compared to the formal authorities. Therefore, it is essential for the chief nursing officer to acknowledge these individuals early and by ensuring that they get utilized in benefitting the organization (Fairholm, 2009). Informal power is intrinsic in all health care centers while playing a significant background role within the smooth functioning or even the interference of that organization (Fairholm, 2009). It is necessary for the management to comply with the fact that formal power might on many occasions be submissive to informal power. Apparently, this is a realism that has to be recognized importantly, directed for the organization’s benefit. There is a need to empower the chief nursing o fficer so as he or she can assume management roles from the transition to the hierarchical model this is a demonstration of their professional growth, as well as development (Higgs, 2008). At every unit level, it is essential to lobby new leadership thereby allowing staff at this level to continue doing peer review, together with unit-based council management in regards to unit governance issues. Considering that our leader, who is also the chief nursing officer, has guided his department ahead while, within the throes of the present chaos in health care, he has developed, while, at the same time, used his power basis, both formal and informal, as an individual while also as a leader (Higgs, 2008). Luckily, he has clinical expertise i.e. expert power, which makes him a member of the executive team in

Identity and Linguistic Repression in Gloria Anzaldua's How to Tame a Research Paper

Identity and Linguistic Repression in Gloria Anzaldua's How to Tame a Wild Tongue - Research Paper Example For instance, issues about linguistic repression and cultural barriers face culturally diverse societies due to the existence and assertion of rights among people in the mainstream and minority cultures. Accordingly, this paper tackles the cultural and linguistic barriers faced by Chicano Spanish in the U.S. in the process of their interaction and integration in the mainstream American society. Further, this paper also studies the different linguistic variations among Chicano Spanish living in mainland U.S. and those living in near the American borders. In relation to Anzaldua’s article, this paper contends that the concept of â€Å"wild tongue† does not actually exist; instead, it is actually a misunderstanding between the mainstream and minority culture concerning their linguistic and cultural practices. Further, this research argues that idea of â€Å"wild tongue† arises out of the outward and seemingly unreasonable restrictions that the American society puts upon its Chicano Spanish immigrants. Relatively, Chicano/as become linguistically aggressive by using the Pachuco language, regardless of the existent linguistic restrictions, and this also brings out the idea of linguistic terrorism. At the end of this research, this paper hopes to identify the implications of linguistic repression on the identity formation of individuals, particularly on how they perceive other cultural denominations. In addressing those objectives, this paper provides the analysis of related literature, particularly scholarly journals and books about the Chicano culture and the Chicano Spanish language. Article Overview Anzaldua’s article highlights one of the most common challenges faced by immigrants in the U.S., particularly those who are non-native English speakers. In the article, Anzaldua defends the origins and authenticity of the Chicano Spanish language while maintaining her assertions concerning the linguistic restrictions in the U.S. as linguist ic terrorism against their language (36). In the article, Anzaldua explains that the Chicano Spanish language comes as a collective desire of the Chicanos/as to assert their cultural and linguistic individuality. For instance, she cites her personal experience on linguistic differences and cultural adaptation wherein she also asserts the repressive impact of such repressions on identity formation. Aside from this, the bottom-line of Anzaldua’s article is her argument about the â€Å"wild tongue† as an assertive response to the existent repressions in the U.S. Anzaldua points out such restrictions in the first few paragraphs of the article, particularly with her encounter with people in the American society. For instance, she cites her meeting with the dentist, who tried to control her tongue. Although the dentist intends to attend to Anzaldua’s teeth, one can say that she misunderstood the dentist’s statement as an outward restriction against her speaking her native language. In the succeeding paragraphs, Anzaldua points out the existing treatment of teachers, both English and Spanish, in teaching English to Chicanos. Specifically, this includes the training both inside and outside the school wherein children, at an early age, are taught to repress their own language and accent to effectively, and easily integrate themselves with the majority culture and language, which is English. Throughout

Apush Outline Essay Example for Free

Apush Outline Essay The Bonds of Empire, 1660-1750 o Rebellion and War, 1660-1713 ? Before Restoration (1660), England made little attempt to weld colonies ? Royal Centralization, 1660-1688 †¢ Restoration monarchs disliked representative government †¢ Charles II rarely called parliament into session after 1674, and none after 1681 †¢ James II wanted to rule as absolute monarch o Meant he would never face an elected legislation †¢ These 2 kings had little sympathy for Am.   RI, and Plymouth into Dominion of New Eng. o 1688= NY and the Jerseys came in o Sir Edmund Andros became governor of Dominion of New Eng. ? The Glorious Revolution in England and America, 1688-1689 †¢ Charles II converted to Catholicism on deathbed †¢ Eng. olerated James’ conversion to Catholicism b/c his heirs (Mary and Anne) were Anglican †¢ Bloodless revolution of 1688=Glorious revolution o Created limited monarchy in Eng. ? Promised to summon parliament once a yr. , sign all its bills, and respect traditional civil liberties o William and Mary (now king and queen of eng. after they overthrew James) dismantled Dominion of New Eng. o NY rebelled with Leisler’s Rebellion ? The Enlightenment †¢ In 1750 the Enlightenment’s greatest contributions to Am. life still lay in the future. A quarter-century later, Anglo-Am. drew on the enlightenment’s revolutionary ideas as they declared their independence from Britain and created the foundations of a new nation †¢ It was an age of optimism, tempered by the realistic recognition of the sad state of the human condition and the need for major reforms. The Enlightenment was less a set of ideas than it was a set of attitudes. At its core was a critical questioning of traditional institutions, customs, and morals. ? The Great Awakening †¢ In New England, the Great Awakening was influential among many Congregationalists †¢ In the Middle and Southern colonies, the Awakening was influential among Presbyterians and other dissenting Protestants. †¢ A time of increased religious activity. The revival began with Jonathan Edwards, a well-educated theologian and Congregationalist minister from Northampton, Massachusetts, who came from Puritan and Calvinist roots, but emphasized the importance and power of immediate, personal religious experience. †¢ Edwards’ sermons were powerful and attracted a large following. o Sinners in the Hands of an Angry God, is his most famous sermon. †¢ The Methodist preacher George Whitefield, visiting from England, continued the movement, traveling across the colonies and preaching in a more dramatic and emotional style, accepting everyone into his audiences.

The Holistic Assessment of a Patient Admitted to a Hospital :: Nursing Medical Papers Surgery

The purpose of this essay is to describe the holistic assessment of a 66 year old male patient who has been admitted to hospital for bowel surgery following the diagnosis of a cancerous tumor. The operation will result in the patient having a part of his bowel removed after which the patient will require a colostomy bag for the elimination of feces (see patient profile in appendix 1 for further details). A Pseudonym will be used to protect the patient’s confidentiality and he will be referred to as ‘Peter’ in this essay which is in line with the nurses’ code of conduct guidelines (NMC 2002). The process of the assessment will be described along with the nursing model chosen. The nursing model gives the student nurse a framework to help direct and guide her throughout the assessment process (Aggleton and Chalmers, 2000). The Roper, Tierney and Logan model (1986) has been chosen as it is the model the ward follows for all assessment procedures. The assessment process using the Roper, Tierney and Logan model is holistic because it relates to the study of the human being as a whole rather than its individual parts. A holistic view point includes two basic beliefs: 1) The individual always responds as a unified whole, 2) Individuals as a whole are different from and more than the sum of their parts (Pearson, Vaughan and Fitzgerald, 2000). Thus the assessment process would not be as accurate if you concentrated on individual systems or parts of the human body. This holistic approach takes into consideration the biological, social and cultural factors that will affect the outcome of the assessment. The nursing process was introduced as a method of nursing that concerns itself with individual’s physical, social and psychological reactions to disease, and which takes into account that the patient is a member of society, which may affect his reaction to disease (Faulkner, 1996). The nursing process is a sequence of steps (Person, Vaughan and Fitzgerald, 1997) passed through in order to achieve the

How are The Characters Presented at the start of A View From The Bridge Essay

The play opens with the introduction of Alfieri. He is shown to have the role of a chorus: a bridging character between the audience and the characters. The chorus tends to exist almost outside the play, as they know the outcome of the play, and is rarely part of the main action; their purpose in a play is to address the audience and help them to interpret action and they are a common feature in tragedy. The significance of Alfieri is that he alludes to the title and is the one giving us the â€Å"View From the Bridge†. Alfieri is described as being a â€Å"portly lawyer in his fifties†. Since he is a lawyer it is safe to assume that he is somewhat wealthy, as shown by the fact that he is portly, however it also hints towards the outcome of the play. As stated by Alfieri â€Å"to see a lawyer †¦ is unlucky. We’re only thought of in connection with disasters† foreshadowing the future events of the play. This idea is furthered when Alfieri says that he was â€Å"powerless to stop it (Eddie’s tale)†. The word powerless implies that the events Alfieri is describing are fated to happen and are inevitable, another trope of tragedy. Additionally Alfieri states that many people were â€Å"justly shot by unjust men† referring to the traditional Italian justice system which focussed heavily on honour and revenge. Unlike a conventional justice system this was ‘enforced’ by the community and the phrase Alfieri says is a comment on how people were being rightfully punished by others just as bad as them. As Eddie enters the house he is greeted by Catherine and they begin to start a conversation about her new clothes. As the conversation progresses Eddie begins to show his dislike for Catherine’s new appearance by telling her she’s â€Å"walking wavy† and mentioning her high heels. The fact that Catherine is described as â€Å"walking wavy† shows that she is maturing as a woman, also shown by her possession of high heels, and Eddies discomfort at this can be chalked up to parental concern. However it could also be said that Eddie is uncomfortable with the idea of Catherine growing up, as shown by the fact that he makes her gradually younger in his head starting at â€Å"Catherine† and ending at â€Å"baby†, and that he is jealous towards the other men and that he is unsure how he feels about her. The parental concern idea is added onto later on when Eddie says that he is â€Å"responsible for you (Catherine)† showing that he feels as though he is obligated to protect her and keep her from harm. Additionally when Catherine tells Eddie of her new job he tells her that it â€Å"ain’t what I wanted†. While this can once again be chalked up to Eddie’s parental concern for Catherine and his desire for her to finish school it seems as if the underlying message is that Eddie wants to control Catherine into doing things that he deems as acceptable rather than giving her the freedom to choose her own life. Eddie’s wish for Catherine to not pursue the job offer she had been given might be explained by the fact that he sees her as the â€Å"Madonna type†. At the time the play was set to be the Madonna type was to be morally and sexually pure, in reference to the Virgin Mary. The fact that Eddie says that she is â€Å"the Madonna type† shows that he is idealising her to an extreme and is also idolising her; he sees her at an impossibly high standard which she has no hope of actually being. Now it could be seen once again as a sort of parental pride for their child to be the Madonna type or it could be interpreted at Eddie seeing her as pure for him, further hinting to the romantic undertones in their relationship. From the moment Beatrice enters the stage it is clear what her role is and where her importance lies. She is seen entering â€Å"wiping her hands with a towel†, it is clear from this point on that Beatrice will have a very domestic role and that within the story she plays the part of a housewife. Additionally what is also made clear is that the relationship between Beatrice and Eddie is not quite perfect. When the news is broken to her that her cousins have arrived in the country Beatrice, quite understandable, is moved to tears. Eddie responds to this by asking her â€Å"what you cryin’ about?† a very unsympathetic response. The question that Eddie poses might imply that on some level he is unable to understand Beatrice’s feelings and that there might be some dysfunction in their relationship. This is demonstrated when she asks Eddie if he’s â€Å"gonna keep her (Catherine) in the house all her life†. This remark from Beatrice shows that she sees the unfair way that Eddie is keeping Catherine in the house and brings to light Eddie’s controlling manner but it could also imply that Beatrice is feeling jealousy towards Catherine, as she is getting all the attention from Eddie, and wants her out of the house. When Catherine returns later on she brings Eddie his cigar and proceeds to light it for him. In the period this play was set, to lighting a man’s cigar was seen as a romantic gesture done between two lovers. This gesture could be interpreted in a sexual manner is the cigar is seen as representing a phallic object. This whole scene serves to hammer in the fact that there is more to Eddie and Catherine’s relationship than there appears to be on the surface. Just after Catherine leaves Eddie asks Beatrice why she’s mad at him, she proceeds to say, â€Å"who’s mad? †¦ I’m not mad †¦ you’re the one is mad.† clearly implying that she is in fact mad. This shows the dysfunction in their relationship caused by Catherine, who is oblivious to the whole thing. The fight was caused by the fact that Catherine went to retrieve Eddie’s cigars which is traditionally a wife’s role. Beatrice’s anger to this shows the jealousy she feels and her frustration due to the fact that Eddie and Catherine do not even realise what is going on. However Catherine might have some clue as to how she’s making Beatrice feel when she is described as speaking â€Å"almost guiltily† after light the cigar. While her guilt might be due to the fact that she hadn’t helped Beatrice clean up the dishes, guilt would be a rather strong emotion to feel for such a small act. What is more likely is that Catherine has realised that she had come in the way of an act that Beatrice should’ve done and is trying to atone for that by helping to clean the dishes.

Sodium Channels In Dental Pulp Health And Social Care Essay

The dental mush is surrounded by the dental difficult tissue, which is a physical barrier against pathogen and hurt. The mush and dentin are frequently discussed together as one functional unit ; the pulpodentin composite. Pulp is capable to lucubrate dentin. The permeable belongingss of dentin regulate the diffusion rate of thorns that can originate pulpal redness. Pulp contains vascularity and several nervus supplies. Blood vass in pulpal tissue are for alimentary supply and cellular enlisting, while nervousnesss in pulpal tissue are for dental sensitiveness and defence response following hurt either from dental cavities or injury. The dental mush has a low capacity for defence or fix responses because of the damage of an equal blood supply and cellular enlisting following dental hurt ( 1 ) . Several surveies have shown that the pulpal excitation plays an of import function in both defence and fix responses ( 2-4 ) . Therefore, in this reappraisal article, we focuses on the pulpal excitation in the response to pulpal hurt as mentioned below. 1.1 Normal excitation in lasting and primary tooth mush Pulpodentin composite in both lasting and primary dentitions is highly rich in excitations, as shown in the survey of Rodd and Boissonade ( 5 ) ( figure 1 ) , which influence the defence reactions in the connective tissue of the mush. These excitations consist of centripetal nervus fibres, sympathetic nervus fibres, and parasympathetic nervus fibres. The centripetal nervus fibres are the major excitation in the dental mush of both lasting and primary dentitions. They originate from trigeminal ganglion, in which centrally terminate in the spinal trigeminal karyon and peripheral base on balls through the apical hiatuss to innervate the coronal mush. At the peripheral portion into the coronal mush, they diverge, subdivision, and terminate as free nervus terminations in the odontoblast beds, subodontoblastic rete, predentin, in the interior 0.1 millimeter of dentin or along blood vass as shown in Byers ‘s survey ( 6 ) ( figure 2 ) . There are three subgroups of centripetal excitation in dental mush based on its size, its conductivity speed, and its map. First, A-? nervus fibres, the moderate-sized medullated fibres, are the smallest population of centripetal nervus fibres that are sensitive to mechanical stimulations such as hydrodynamic, percussion and motion force. Second, the little myelinated A-? nervus fibres can be seen m uch greater in dental mush. Finally, the largest part of centripetal nervus fibres is the unmyelinated, slow carry oning C fibres. Both A-? and C fibres are classified as the nociceptive which respond to noxious stimulations. The centripetal nervus fibres besides involve in dentinal fluid kineticss, vasoregulation and protective physiological reaction against dental hurts ( 7-9 ) . They provide verve of the dental mush by interacting with other pulpal cells, such as odontoblasts, immunocompetent cells, and blood vass. The old survey in rat theoretical accounts indicated that the centripetal nervus fibres in dental mush play an of import function in endurance of mush tissue. In that survey, they demonstrated that dentition with centripetal denervation had greater loss of mush tissue than those with excitation ( 4 ) . The sympathetic nervus fibres are sparse in dental mush of both lasting and primary dentitions. They are from superior cervical ganglion, located along the blood vass in deeper mush and involved in vasoconstriction. The other group of pulpal excitation in lasting and primary dentitions is parasympathetic nervus fibres, which play functions in ordinance of pulpal blood flow but are much less of import than the other two nervus fibres mentioned before. During the ripening and aging in lasting dentitions, dental mush becomes narrower with the deposition of third dentin and dead piece of lands, which are usually no excitation. With increasing loss of primary dentin, tooth excitation decreases as shown by the decrease in look of neuropeptides and their receptors in the dental mush ( 9, 10 ) . Several surveies demoing the distribution of nervus fibres in dental mush normally used protein cistron merchandise 9.5 ( PGP9.5 ) , a soluble protein isolated from encephalons, as a marker of nervus fibres. PGP9.5 staining appears to be dependable in responding with nervus fibres in several surveies with different techniques: immunohistochemistry ( 11 ) , immunoblotting ( 12 ) , immunocytochemistry ( 13-15 ) and immunofluorescence ( 5, 15, 16 ) . The centripetal excitations of primary dentitions differ in measure from those of lasting dentitions, in which the centripetal excitations of lasting dentitions are greater than primary dentitions ( 5, 13, 17 ) . Due to the outstanding map of centripetal nervus fibres in hurting transmittal, hence, several research workers hypothesized that the primary dentitions have less sensitiveness than the lasting dentition since the primary dentitions have less centripetal excitations. However, a old survey revealed different consequences in centripetal excitations between primary and lasting dentition ( 18 ) . In that survey, centripetal nervus supply in primary human dentition differs from lasting dentitions in two ways. First, the distribution of excitations within the Crown of primary dentitions were highest at cervical, while the lasting dentitions were dumbly supplied in the pulpal horn dentin. Second, the roots of primary dentin were peculiarly innervated at the cervical terminals of ro ots, but the roots of lasting dentin were virtually uninnervated. In add-on, physiologic root reabsorption does non impact histological construction and overall excitation of primary dentitions ( 19, 20 ) . Figure 1 shows the excitations in coronal mush of primary ( A ) and lasting ( B ) homo dentition. ( With permission of †¦ ) ( 5 ) Figure 2 shows the expiration o centripetal nervus fibres as free nervus terminations in the odontoblast beds ( OB ) , subodontoblastic rete ( rete of Raschkow: PI ) , predentin ( PD ) , in the interior 0.1 millimeter of dentin ( D ) or along blood vass. ( With permission of †¦ ) ( 1 ) 1.2 Sensory neuropeptides in dental mush The centripetal nervus fibres in dental mush are afferent fibres involved preponderantly in hurting perceptual experience. The terminuss of centripetal nervus fibres contain neuropeptides, synthesized neurotransmitter proteins from nerve cells. These peptidergic nerve cells are associated with neurogenic redness, caused by utmost stimulations such as dental cavities, boring, examining of the open dentin, or percussion of the dentition, in order to supply the verve of dental mush ( 21 ) . Dymanical alterations in peptidergic nerve cells occur during redness by extended germination. These germinations result in increased possible sites of neuropeptide incorporating fibres and accordingly released neuropeptides ( 3, 13, 14, 22-24 ) . Neuropeptides can non traverse cell membranes, so they trigger biological effects by triping their receptors located on the plasma membrane of the mark cells and they are quickly degraded by the enzymes in mush tissue after exercising the effects ( 25 ) . F unctions of centripetal neuropeptides are multiple and variable. They could move as neurotransmitters, growing factors, endocrines, vasoregulators, immune system and signaling molecules. It is known that neuropeptides contribute to advance neurogenic redness, control of pulpal blood flow, and affect in hurting mechanisms of pulpodentin composite ( 26 ) . Several surveies demonstrated that neuropeptides can modulate vascular smooth musculus, addition in vascular permeableness, and besides modulate immunosystem ( 8, 26, 27 ) . The centripetal neuropeptides in lasting and primary tooth mush consist of calcitonin gene-related peptides ( CGRP ) , substance P ( SP ) and neurokinin A ( NKA ) ( 26, 28 ) . Summary of the beginning, localisation, stimulation and biological effects from centripetal neuropeptides in dental mush are summarized in table 1. 1.3 Nervous reactions to pulpal hurts When dental mush is injured, the altered conditions activate nervus fibres to bring on neurogenic redness, which is a procedure of stimuli-induced neuropeptides release, alteration in vascular permeableness and the enlisting of immunocompetent cells. The neurogenic redness can take to mending procedure ( 26, 29 ) . Several surveies have demonstrated the neurogenic redness happening in the dental mush following dental hurt. For illustration: the sensory ( 13, 30, 31 ) and sympathetic ( 2 ) nervus fibres shooting were found in inflamed dental mush. Byers and co-workers ( 32 ) demonstrated the variable grade of centripetal nervus fibres shooting correlated with assorted grade of hurt to dental mush of rat theoretical accounts. In that survey, mild hurt, e.g. shallow pits, caused an addition in CGRP-immunoreactive fibres, and those shooting CGRP-nerve fibres subsided within 21 yearss. The deeper pits were more injured to dental mush and leaded to microabscess with more legion subdivision s of centripetal nervus fibres shooting underneath. The shooting fibres had taken longer clip to lessen and the reparative dentin was substituted in those pulpal hurts microabscess. When the hurt theoretical accounts were the exposure of dental mush, several defensive reactions could be found, in such as mush polyps, curdling mortification and liquefying mortification. In those terrible pulpal hurts, the CGRP-immunoreactive fibres were found shooting following to the boundary line of defensive reactions and the axons were found to piece in the nucleus of lasting mush. As we have mentioned before, due to increased possible sites of neuropeptides release and the function of centripetal neuropeptides in hurting mechanism, the germination of centripetal nervus fibres following redness may change cytochemical reactions in the dental mush and contribute to the altered efficaciousness of local anaesthesia.2. The look of Na channels in dental mush and their relation to dental inflammatory h urtingThe voltage-gated Na channels ( VGSCs ) are complex transmembrane pores that are responsible in depolarisation, peculiarly the raising stage of the action potency. They are found in excitable cells, such as nerve cells, myocytes ( 33 ) and some types of glia cells ( 34 ) . VGSCs unfastened within a msec in response to electrical alteration across the membrane to let Na ions influx and cause the increased neural membrane potency. Then, they terminate within unextended periods of clip to obstruct the Na ions flow and the nerve cells enter repolarization phase by the allowance of K ions influx at the neural membrane. After shutting, VGSCs return to resting province and are available to reopen in response to new moving ridge of electrical alteration. Therefore, VGSCs contribute to the finding of neural irritability and besides play the function in the extension of nervus urges. During hurts or redness, VGSCs in primary centripetal nerve cells are continuously activated and the uni nterrupted activation of VGSCs gives rise to motiveless self-generated action potency activity, that eventually cause uninterrupted hurting ( 35 ) . The Na channel is the selective filter composed of 1 big uninterrupted protein, ?-subunit and 1 or 2 smaller proteins, ?-subunits. The ?-subunits, a 220-260 kD polypeptide, contain a functional portion of ion channel including electromotive force detector, ion pore, activation, and inactivation gate. The ?-subunits modulate the maps of the ?-subunits and stabilise them to the plasma membrane. In mammals, 9 cistrons have been identified to encode VGSC ?-subunits into 9 isoforms depend on amino acid sequence homology and familial location. Each isoform differs in map such as tissue distribution, electrophysiological belongingss, pharmacological belongingss, and response to steel hurt and redness. Furthermore, each one is associated with the assortment of receptor molecules to modulate the irritability of nociceptors, so there are diversified procedures of nervus impulse extension depending on the nowadays of sodium channel ?-subunit isoform, for illustration, changing in opening thresh olds, opening clip length, sum of inactivation clip, or rate of isoform passage from closed inactivated province to the resting close province ( 36 ) . VGSCs can be functionally classified depending on the standards used, as shown in table 2, and the belongingss of each VGSC ?-subunit isoforms are summarized in table 3. In physiological status, the centripetal nerve cells in dorsal root ganglion ( DRG ) and trigeminal ganglion express both TTX-sensitive ( TTX-S ) and TTX-resistant ( TTX-R ) Na channels. The most population of centripetal nerve cells is mechanoreceptive with rapid-inactivating TTX-S Na channels. The little population is nociceptive, showing a mixture of rapid-inactivating TTX-S and slow-inactivating TTX-R Na channels. During the inflammatory procedure, inflammatory go-betweens lower the threshold of activation and increase the irritability of TTX-R in primary centripetal nerve cells, contribute to neural hyperexcitability ( 37 ) . Furthermore, there is the altered look of both TTX-S and TTX-R VGSCs in inflamed peripheral tissues ( 36, 38 ) . These alterations lead to increased hurting provinces. In dental mush, the quickly inactivating, TTX-S Na currents have been detected in civilized human alveolar consonant mush cells ( 39 ) . The writer suggested that the chief beginning of these Na currents were from neural orbiter cells, non odontogenic cells, because odontoblastic procedure of odontoblasts that steadfastly embedded themselves to the dentin and do non allowed these cells to be explanted. On the other manus, the in vitro survey of Allard and co-workers ( 40 ) found that odontoblasts expressed voltage-gated TTX-S currents which has capableness to bring forth action potency, but TTX-R Na currents has non been detected. Henry and co-worker ( 41 ) found no alteration in overall Na channels look in painful human alveolar consonant mush. But when concentrating on the feature of nodal sites, the measure of untypical nodal sites, including the Na channel look at these countries was found to be increased, while the typical nodal sites and Na channel accretion at these countries was found to be decreased. This survey showed that redness caused the demyelinating procedure and remodeling of the form of Na channel accretion. Many surveies supported the survey of Henry and co-worker. They revealed an addition in the look of NaV1.7 ( 16 ) , NaV1.8 ( 11, 12 ) and NaV1.9 ( 42 ) in dental mush with irreversible pulpitis comparison to dental mush of non-painful dentitions. NaV1.6 has besides been found in dental mush of both worlds and rats ( 43 ) , but its map in pulpal redness remains ill-defined. Not merely VGSCs isoforms, but besides epithelial Na channel, which is non-VGSC have been found in dental mush. The l ook of each Na channel isoform in dental mush is as described below. NaV1.6 is a TTX-sensitive VGSC isoform remarkably expresses at nodes of Ranvier, although assorted sodium channel isoforms are located within the PNS and CNS. Its map has been suggested to be an electrical conductivity in both myelinated and unmyelinated axons ( 44 ) . The look of NaV1.6 in human lasting tooth mush has been reported in the survey of Luo and co-workers ( 45 ) utilizing immunocytochemistry that there was no important difference in the look of NaV1.6 in normal and painful mush, despite an addition in the proportion of untypical nodes of Ranvier and an lessening in typical nodal sites in painful mush. The survey in rat theoretical accounts utilizing immunohistochemistry and dual immunofluorescence ( 43 ) has found that NaV1.6 expressed in pulpal immune cells, dendritic pulpal cells, and even in odontoblasts. This may propose the function of NaV1.6 in these cells. In contrast to the survey of Luo and co-workers ( 45 ) , mush tissue of injured rat dentitions in this survey showed the addition in NaV1.6 immunoreactive cells, preponderantly around the injured site and dilated blood vass. NaV1.7 is the TTX-sensitive VGSC isoform that was widely studied. It has been identified in the sympathetic nerve cells and little and average size centripetal nerve cells of DRG, which include nociceptive nerve cells. For the electrophysiological facet, NaV1.7 is quickly activated, quickly inactivated and easy recovered from fast activation, so it plays an of import function in puting the threshold for coevals of action potencies in peripheral nociceptive nerve cells ( 35 ) . NaV1.7 is markedly involved in comprehending hurting esthesis. As evidenced in the patients with loss-of-function mutant in SCN9A cistron, a cistron that encodes NaV1.7, those who have loss of NaV1.7 map are unable to see hurting ( 46, 47 ) . In add-on, patients with inborn hurting syndrome who have an change in NaV1.7 map have increased hurting sensitiveness associated with hydrops, inflammation and heat, proposing the function of NaV1.7 in chronic inflammatory hurting ( 48 ) . In dental mush of human lasting dentition, the upregulation of NaV1.7 look has besides been reported in painful pulpitis under immunohistochemical method ( 49 ) , every bit good as immunocytochemical method ( 16 ) , which has demonstrated the increased look of NaV1.7 isoform at typical and untypical nodal sites. The VGSC ?-subunit isoform 1.8 ( NaV1.8 ) and VGSC ?-subunit isoform 1.9 ( NaV1.9 ) , the slower TTX-R constituents, are unusually found in little unmyelinated centripetal nerve cells that have been identified as nociceptive nerve cells ( 36 ) . NaV1.8 has a high activation threshold, slow inactivation dynamicss and contribute to electrogenesis of action potency in C-type peripheral nerve cells of mice theoretical accounts ( 50 ) . NaV1.9 activates at potencies near resting membrane potency and generates comparatively relentless current ( 51 ) . Both TTX-R signifiers: NaV1.8, NaV1.9, are believed to be involved in the drawn-out continuance of action potency in response to painful stimulations and have been found to upregulate during inflammatory hurting ( 38, 52, 53 ) . Therefore, these sodium channel isoforms might be a new mark for intervention of inflammatory hurting. The different belongingss of NaV1.8 and NaV1.9 are as following. NaV1.8 currents have slow activation rate and fas t inactivation rate. The function of NaV1.8 in electrogenesis is to find action potency of nerve cells due to slower inactivation rates. The steady-state electromotive force dependance of inactivation contributes to bring forth action possible even at depolarisation province. NaV1.9 currents are alone and can be activated at electromotive force near the resting membrane potency and can bring forth relentless currents. Then, NaV1.9 can be easy activated, lend to puting of the threshold of activation, and can stay opening for longer clip than NaV1.8 ( 35, 36, 54 ) . Previous surveies utilizing antisense for NaV1.8 utilizing oligodeoxynucleotides ( 53, 55 ) and NaV1.8-null mice ( 56 ) have shown that NaV1.8 plays a function in inflammatory hurting and neuropathic hurting. NaV1.9 channels besides have a function in inflammatory hurting but non in neuropathic hurting ( 57, 58 ) . Localization of NaV1.8 in human dentitions with painful pulpitis has been investigated utilizing immunohistochemical method ( 11 ) . It has been found that NaV1.8-immunoreactive nervus fibres were localized in subodontoblastic bed of both healthy and inflamed mush tissue. However, the sensing of NaV1.8-immunoreactive fibres was much more seen in the inflamed dental mush. Furthermore, the upregulation of NaV1.8 has been reported utilizing the immmunoblotting method that has been used to quantify the protein degrees of NaV1.8 in inflamed human lasting tooth mush comparison to healthy mush ( 12 ) . The immunofluorescent survey has revealed that non merely the predominant NaV1.6, but besides NaV1.8 has presented at the nodes of Ranvier in the radicular portion of healthy human lasting tooth mush ( 59 ) . This determination has suggested the coexistence of multiple Na channel isoforms in these countries that may alter in the degrees of look during the inflammatory period and contribute to increased hurting position. For NaV1.9, the probe in rat theoretical accounts has revealed the excitations of NaV1.9-immunoreactive fibres in the lip tegument and dental mush of non-painful dentitions, proposing the function of this VGSC isoform in orofacial hurting ( 60 ) . Equally good as the other Na channel mentioned above, the immunocytochemical method has reported the increased look of NaV1.9 in the axons of diagnostic pulpitis of human lasting tooth ( 42 ) . Epithelial Na channel ( ENaC ) protein is a member of degenerins household ( DEG ) , which is a big protein household of diverse maps, such as Na ion conveyance, acerb esthesis, proprioception, and mechanosensation ( 61 ) . Differing from VGSCs which consist of ?- and ?- fractional monetary unit, ENaC consists of four fractional monetary units: ? , ? , ? and ? fractional monetary unit ( 62 ) . Merely ? , ? and ? fractional monetary units of ENaC has been indicated in mechanoreceptors in trigeminal ganglion of rat theoretical accounts with a possible map in mechanotransduction ( 63 ) . ENaC? has been identified in the terminal Schwann cells associated with the periodontic Ruffini terminations in the periodontic ligament of the rat incisors and believed to be a cardinal molecule for mechanosensation in chew ( 64 ) . There has besides been the ENaC in rat dental mush tissue, as being seen by immunohistochimistry ( 65 ) . In this survey, the ?ENaC and ?ENaC-immunoreactive fibres have app eared in trigeminal ganglion nerve cells, periodontic ligament, deep bed of unwritten mucous membrane, inferior alveolar nervus fibres, radicular mush and subodontoblastic rete of rat grinders mush tissue. The localisation of ?ENaC in dental mush was largely at myelinated nervus fibres which are sensitive to mechanical stimulations, while it was largely barren at unmyelinated nociceptive axons. There have been the efforts to detect new substances for Na channel blockers for the intervention of both neuropathic and inflammatory hurting. Lidocaine, normally used anaesthetics, is one of those with non-specific barricading belongings. Scholz and co-workers reported that TTX-R channels are more immune to lidocaine than TTX-S in rat theoretical accounts ( 66 ) . In contrast to Scholz survey, other surveies in rat theoretical accounts reported TTX-R channels are more sensitive to lidocaine than TTX-S Na channels ( 67, 68 ) . Until now, the specific VGSC isoforms that are the jobs in anaesthetic failure is still controverted. The usage of combination between for good charged Lidocaine ( N-ethyl-lidocaine ) and capsaicin, an agonist for the transient receptor possible vanilloid 1 ( TRPV1 ) , in rat theoretical accounts has been reported ( 69 ) . The writers claimed the advantage of this regimen over the usage of apparent local anaesthetic agents in non doing the shortage in motor an d autonomic nervus map, but it required further survey. Isoflurane, an inhalating anaesthetic agent, was besides proved to barricade TTX-s every bit good as NaV1.8 currents in rats ( 70 ) . Eugenol, the broad usage agent in dental clinic, had ability to suppress both TTX-R and TTX-S Na ion currents in rats and had the consequence on nociceptive, every bit good as non-nociceptive fibres ( 71, 72 ) . Hence, eugenol may be another good pick to be an analgetic and anaesthetic agents used in dental intervention. In add-on to those mentioned above, the Na channel barricading efficaciousness of assortment opioid derived functions has been studied. This survey found that tramadol, Fentanyl and sufentanil had sodium channel barricading ability particularly in slow-activation Na channel isoform, while morphia did non ( 73 ) . The specific Na channel blockers have been improved but they are limited to specific NaV1.8 blockers, such as ?O-conotoxin MrVIB from Conus Marmoreus ( 74 ) , a little m olecule antisense oligonucleotide ( A-803467 ) ( 75, 76 ) and 5-Aryl-2-furfuramides ( 77 ) . Unfortunately, despite many researches about Na channel blockers, none of Na channel barricading agents is considered to be effectual and safe plenty to utilize in homo. Further surveies for the new coevals of hurting intervention are still needed. In decision, dental hurting is a important wellness job. Although several voltage-gated Na channel isoforms, every bit good as an epithelial Na channel, have been identified in dental mush with different location and map, merely NaV1.7, NaV1.8 and NaV1.9 serve as a cardinal function in inflammatory mush. These sodium channel isoforms are suggested to be the possible marks for the fresh hurting intervention of pulpal redness and to seek for fresh anaesthetics in the intervention of painful pulpitis.