Discussing The Problems Of Online Shopping Information Technology Essay

Discussing The Problems Of Online Shopping Information Technology Essay The aim of this literature review is to critically analyze the various problems/solutions of online shopping system, and benefits of online shopping system in Nigeria. Introduction In Nigeria, different business and market transactions are being practice face to face ie buying and selling of different goods and services are been done in the market. Implementations of online shopping practices has been difficult and associated with a lot of problems such as user privacy , insecurity and trust has made it not visible for such to be implemented. The internet as a global network which allows people to communicate, perform business transactions, send, store and receive information.The internet has become an improtant process to everyday life and different people from different countries use the internet in order to carryout their effective skills in their different professions and for income making. Looking at online shopping as the case study, today online shopping is becoming popular to people/client and consumer as another channel and fast means of making business transactions and customer satisfaction. According to (bbc) statistics, showed in december 2008 have reviewed the statistis of 50% rise in 2008 christmas online shopping, however (www.nma.co.uk) in febuary 2010 recorded the sales of 4.1billion pounds for online retailers and a rise of 13% in febuary 2010. problems of online shopping Belanger, F (2002) identified privacy, security and trustworthiness as a major factor that prevent people from shopping online. it is important to understand this factors that might prevent customer or users from shopping online and some of this factors include; privacy: privacy which is a most important problem that stops people from shopping online or using the internet above the problem of cost and convienence giving. It is the will of the customer to share information online for purchase, However it is clear that customers concern with privacy of information is having effect on shopping online and therefore to resolve this problem, privacy potentials need to be further addressed (Belanger. F, p 4). In 2000, pew internet and American life reported that 66% of users proposed that online tracking should be barred and 81% supported for rules to be implemented in online information systems and in 2002 National Consumers League survey, respondents ranked personal privacy above health care, education, crime and taxes as concerns to users (Paul, 2001) as cited by Belanger. F (2002) . Privacy issues on the Internet include spam, usage tracking and data collection, choice, and the sharing of information with third parties. These areas of fear are found in the taxonomy described by Huaiqing, W (1998), are reflected in the Federal Trade Commissions standard for privacy on the Internet. The FTC identifies notice, choice, access and security as elements of a pleasing privacy policy. Customers guarantee that the information shared will be subjected to personally outlined limits is the essence of privacy on the Internet. Therefore, for this research the definition of privacy that is adopted is the ability to manage information about oneself. Security: Security threat has been defined as condition, state, or event which is possible to cause economic adversities to data or network resources in the form of destruction, exposure, change of data, denial of service, fraud, waste, and abuse (Kalakota and Whinston, 1996). Security, then, is the protection against these threats. Under this definition, threats can be made either through network and data transaction attacks, or through unauthorized access by means of false or defective authentications. This definition must be tailored in order to be relevant to customer transactions to acknowledge that customers information has value. For customers, it must be recognized that economic hardship include damages to privacy that is loss of information as well as theft, for example, credit information and authentication issues for customers will be reversed. This definition explains the security threats from a customers point of view. Security in online shopping is reflected in the technologies u sed to protect and secure customer data. However Security concerns of customers may be addressed by many of the same technology protections as those of businesses, such as encryption and authentication. Our description of privacy and security is similar to the distinction that Hoffman .L (1999) use in identifying environmental control as separate from control over secondary use of information, described above. Environmental control refers to customers concerns with sharing information online due to expectations of threats to online security, including fear of hackers and identity theft. Trustworthiness: For People to make important buying and selling decisions is based on their level of trust in the product, salesperson, and the company (Hosmer, 1995). Similarly, online shopping decisions involve trust not simply between the shop merchant and the customer but also between the customer and the computer system through which transactions are executed (Lee and Turban, 2001). Although many studies have identified the critical role of customers trust in online shopping, two critical issues have hampered empirical investigations of the impact of customers trust on on-line shopping activities. The first issue is focused on the lack of agreement about the definition of online customer trust (Lee and Turban, 2001). Although most of these definitions capture the notion of risk taking, many are merely operationally taken from the traditional shopping literature and applied to the online context. More importantly, few of these definitions specify the on-line trust equivalent for example, Moorman (1993, p. 82) . Defines customer trust as a willingness to rely on an exchange associate in whom one has confidence. This definition suggests that trust reflects a continuum of readiness that is readiness to engage in a relationship with the other party, such as a salesperson (Crosby, 1990) . Rather than focusing on trust in individuals, this study focuses on the electronic organization as well as its site as the exchange party. The second issue hinder richer examinations of online customer trust as the lack of experimental notice given to one critical precursor of customer. (Lee and Turban, 2001) Several researchers have identified three main elements of trustworthiness: ability, kindness, and integrity (Mayer, 1995; Lee and Turban, 2001). According to (Mayer,1995; Lee and Turban, 2001), the ability of a merchant is reflected in its ability to handle sales dealings and the expertise to generally conduct business online. In contrast, perceived integrity is evidence of the marketers honesty and sincerity. Finally, kindness was defined as the extent to which the trusting party believes that the trusted party wants to do good things rather than just maximize profit. In contrast to the other two transaction focused magnitude, kindness reflects perceptions of the marketers willingness to engage in flexible or humanitarian commitment to its customers. A similar dimensional distinction can be found in the corporate social responsibility literature (Carroll, 1979; Smith., 2001) cited by Belanger. F (2002) . Additional insights from this literature also indicate that a firms economic responsibilities that is to make a profit and its flexible responsibilities are often negatively correlated (Ibrahim, 1997) cited by Belanger. F (2002). These findings suggest that customers expect marketers to be have high ability primarily focus on maximizing profits often at the cost of being kind. Solutions Technology solutions Winnie, C and John,P (2002, P 7) suggested that the advance of technology could be used as a solution for privacy protection and described two examples of this technologies. Firstly one established standard is called Platform for Privacy Preference. The privacy preference system works through web browsers to automatically alert users to what information is being collected online. The aim of privacy preference system is to have a common privacy language and standard on the internet that provides a rich language for services to express their information practices and for users to express their privacy preferences. Users will be warned and have an alternative to leave if the site is gathering information for shopping purposes also they can choose to give their private information only to sites that will not use it for shopping. Thus, privacy preference system technology helps users make informed decisions about when to release their data. Secondly is the anonymizer which ensures users surfing the web anonymously, will hide their surfing history when users are browsing the web. It will not stop cookies, but it will allow users to surf the Internet while withholding their IP addresses and other information about them. This ensures that the identity of the users will not be identified. Recently, a new privacy enhancing cookie management feature has been released for Internet Explorer with this version, users will be asked and prompted in detail before letting a cookie enter into the system. A description of all cookies and their purpose will be given plus a clear distinction between first and third party ones. A default setting will alert the user when a persistent third party cookie is being served or read on the users system. It is argued that technical solutions cannot solve the privacy concerns permanently. Although the advance of technology is able to solve the privacy concerns at the moment, it will not work in the near future. Web sites can also utilise advances of technology to obtain personal information as the technology evolves. Thus, just using technological solutions is not reliable in terms of privacy concerns. Combination solutions Winnie, C and John,P (2002, P 7) also believed that using a combination solution is possible to achieve privacy protection in a globally consistent manner. The combination of legislation, self regulation and technical solutions may provide synergy that is more effective than a single solution. Users must be assured that when they release their data, services will use it only as they have promised. Legislation and self-regulatory regime can help in providing such assurances. While self-regulation and privacy enhancing technologies are welcome developments in order to enhance privacy protection, they might not be sufficient by themselves and they could be accompanied by legislation. Security solution IBM (2005) stated that there are three main concept of security: confidentiality, integrity, and availability. Confidentiality which only permit authorized parties to read protected information and also talked about three types of security categories: 1. Authentication: confirm who you are. It requires that you are the only one authorized to logon to the shopping system. 2. Authorization: This allows only the user to manipulate his resources In Specific ways. 3. Encryption: Deals with information hiding which prevent unauthorised User from accessing customer information. conclusions The growth of online shopping system is non-stoppable. Yet, online users spending only accounts for about 1.7% of overall revenues. The privacy, security and trust concerns are posing a barrier to the Development of online shopping in Nigeria. It is an issue that online Shopping system cannot afford to ignore because privacy, security and trust concerns are blocking online sales. And the key is that Companies doing online sales need to manage and meet their customers expectations where privacy, security and trust is concerned. A web site with a privacy, security and trust statement tells customers that their privacy right is being considered. It would not be good for the shopping system if a client finds that something unexpected has happened to their information, perhaps an unexpected access from unauthorised users. Shopping business open about their practice and abiding by their privacy and security statements will win both customers confidence and custom to shop online. For online shopping to succeed in Nigeria, online shopping must build trust with millions of consumers. Respecting consumers privacy and security is necessary in order to boost the growth of electronic commerce. Therefore it is believed that global consistency on Internet privacy and protection is important to boost the growth of shopping online.

Plato’s Forms

Eric Morin 103317083 01-26-285 Professor L. Buj Jan 16, 2011 Plato’s Criticism On Deceptive Forms Plato’s critique of art operates on two levels, the ontological and the moral. Both levels are interpreted within disdain taste as Plato proposes that the banishment of art could actually bring fourth a closer connection between humanity and truth. His argument against the existence of art as well as its functioning purposes will be further discussed in this paper. Plato’s ontological view on the existence of art looks deep within the nature as well as its overall properties rather bitterly.Plato’s attack on art does not merely constitute visual art, but rather holds a more expansive scope reaching into literature and especially poetry. For Plato, art is accountable for multiple negative influences, which affect all audiences who try to interpret it. These influences are what Plato believes hinders humanity towards aspiring truth. Art for Plato receives negati ve attention at the moment of creation. Plato believes that the thoughts processed by the creator and/or artist are far from original and are alternatively imitations of the real world hich are themselves distant from the ideal Forms. These ideal Forms consist of the ultimate paradigms in our universe containing truth and 2 absolute wholeness, thus proposing a problem for Plato. These copies of copies are referred to as mimesis. During the grandeur search of truth, mimesis serves the audience deceit and alarmingly leads them farther from the ideal Forms. As mentioned in the text, â€Å"Because mimesis presents us with an inferior copy of a copy, poetry takes its listeners away from rather than toward the ideal Forms† (Leitch 43).The hypocrisy surrounding literature proves to be troublesome for Plato on a multitude of levels. In the search for completeness, art not only fails to provide insight toward truth but rather, is actually lying to you. This mimetic stance held within the nature of art is believed to be nothing more than fabrication. Plato maintains his argument by stating that as the audience is deceptively reeled into a degraded mind state, truth is less obtainable. Introduced in the text, â€Å"Because [Literature] stories are fictional, made up, literature is dangerous; it roduces only lies† (43). Plato not only bashes art on an ontological level, but also finds problems morally. During deception and degradation through imitation within text, Plato analyzes the problems art has within its nature and relates that to the morality of audience. He argues that if art is further removing oneself from the truth, than it cannot be in the best interest of man. Thus, banishment of art would be the only way to restore deception and appease humanity. 3 Plato begins by focusing on the dangerous elements of art and its affect on young minds.His argument states, â€Å"Now, do you appreciate that the most important stage of any enterprise is the begi nning, especially when something young and sensitive is involved? † (46). In this part of the text, Plato is trying to explain that not only is the young mind fragile enough to easily fall into this created trap of deceit, but also that ruining the quest for truth at a young age brings upon negative consequences for all of humanity. Argued furthermore, â€Å"No young person is to hear stories which suggest that were he to commit the vilest of crimes †¦ he wouldn’t be doing anything out of the rdinary, but would simply be behaving like the first and greatest gods† (47). Here Plato is arguing that the falsehood within stories can fantasize young minds into ultimately developing enhanced personas, which escalates into degradation of truth in reality. Plato further extends his argument on art and morality into the minds of all humans. Since art is of a deceitful nature according to Plato, it cannot undertone any good found within the text but is instead consider ed the primary fault within literature. Thus, the deception in which the audience resorts to is ultimately proposed as egative and unneeded. Different from a beneficial spoken lie, Plato states about literature, â€Å"All I’m saying is that no one is happy at being 4 lied to and deceived in his mind about the facts† (51). One of Plato’s biggest moral issues with art explores the depiction of human kind in literature. He believes that in order to truly display characteristics of a character we are not only mending the emotions and feelings to suit the text itself but for our own personal capacity. This sort of mutilation of character not only revives the notion of eception within literature but again bringing treason to our own reality. By distorting the character, we would be digging through created deceit as well as misinterpreting the true meaning of what was intended. Plato not only rejects our created distortion, but also feels as though the author creates t his misinterpretation in a deceptive way. As Plato addresses, â€Å"What we’d claim, I imagine, is that poets and prose-writers misrepresent people in extremely important ways† (58). A real life example of artwork that could be examined and placed under Plato’s critical thinking rests in Versailles.There, artist Jeff Koons has created a replica of an inflatable lobster that hangs down from the ceiling for all to see. The lobster seems to be created as though it is soft to touch and friendly to the eyes. Already our senses have been deceived. As Plato would primarily analyze the creationist, we find that Jeff 5 Koons has not only produced a copy of a copy, but adds double the mimetic stages. Plato would argue that Jeff’s original thought has come from an ideal Form, followed by his initial drawing, then an addition of computer enhancement, and lastly interpreted and actually reated by fellow minds in his workshop. This notion sets the idea that Jeff is rat her far from being the creationist, which is deceptive to audience in itself. Plato’s ontological stance would prove testy and unacceptable, as mimetic deceit is thoroughly prevalent within the whole of this piece. Plato would then examine the piece of art and relate it to morality. As this specific piece hangs down appearing soft and inflatable, it as well is deceitful in itself. Made out of metal, the lobster looms above the heads of audiences worldwide. Confusing to our senses, he would isapprove the artworks influence and be especially concerned for child observers. Plato would believe that not only is the nature of this piece deceptive, but our outtake of what we have witnessed would follow suit. In all of this deception, Plato would argue that artwork does indeed lead humanity farther from the truth and most importantly from primary ideal Forms, thus resulting in banishment being the primal response. 6 Works Cited Leitch, Vincent B. , ed. The Norton Anthology of Theory & Criticism. New York, NY: Norton, 2010. Print.

The Behavior Of Human Being Health And Social Care Essay

Methodology is a subject ; study the behaviour of human being in assorted societal scene. Harmonizing to Merton ( 1957 ) methodological analysis is the logic of scientific process. The research is a systematic method of detecting new facts for verifying old facts, their sequence, interrelatedness, insouciant account and natural Torahs that govern them. The scientific methodological analysis is a system of explicit regulations and processs upon which research is based and against which the claim for cognition are evaluated. This subdivision of the survey edifying the description of the survey country, definitions of stuff used methods to accomplish the aims and indispensable parts of the present survey.3.1 Data Collection:The information is collected by carry oning a study so that those factors can be considered which were non available in the infirmary record and were most of import as the hazard factors of hepatitis. The study was conducted in the liver Centre of the DHQ infirmary Faisalabad during the months of February and March 2009. A questionnaire was made for the intent of study and all possible hazard factors were added in it. During the two months the figure of patients that were interviewed was 262. The factors studied in this study are Age, Gender, Education, Marital Status, Area, Hepatitis Type, Profession, Jaundice History, History of Blood Transfusion, History of Surgery, Family History, Smoking, and Diabetes. Most of the factors in this information set are binary and some have more than two classs. Hepatitis type is response variable which has three classs.3.2 Restrictions of Datas:In the outline it was decided to take a complete study on the five types of hepatitis but during the study it was known that hepatitis A is non a unsafe disease and the patients of this disease are non admitted in the infirmary. In this disease patients can be all right after 1 or 2 cheque ups and largely patients do n't cognize that they have this disease and with the transition of clip their disease finished without any side consequence. On the other manus, hepatitis D and E are really rare and really unsafe diseases. HDV can hold growing in the presence of HBV. The patient, who has hepatitis B , can hold hepatitis D but non the other than that. These are really rare instances. During my two months study non a individual patient of hepatitis A, D and E was found. Largely people are enduring from the hepatitis B and C. So now the dependant variable has three classs. Therefore polynomial logistic arrested development theoretical account with a dependant variable holding three classs is made.3.3 Statistical Variables:The word variable is used in statistically oriented literature to bespeak a characteristic or a belongings that is possible to mensurate. When the research worker measures something, he makes a numerical theoretical account of the phenomenon being measured. Measurements of a variable addition their significance from the fact that there exists a alone correspondence between the assigned Numberss and the degrees of the belongings being measured. In the finding of the appropriate statistical analysis for a given set of informations, it is utile to sort variables by type. One method for sorting variables is by the grade of edification evident in the manner they are measured. For illustration, a research worker can mensurate tallness of people harmonizing to whether the top of their caput exceeds a grade on the wall: if yes, they are tall ; and if no, they are short. On the other manus, the research worker can besides mensurate tallness in centimetres or inches. The ulterior technique is a more sophisticated manner of mensurating tallness. As a scientific subject progresss, measurings of the variables with which it deals become more sophisticated. Assorted efforts have been made to formalise variable categorization. A normally recognized system is proposed by Stevens ( 1951 ) . In this system measurings are classified as nominal, ordinal, interval, or ratio graduated tables. In deducing his categorization, Stevens characterized each of the four types by a transmutation that would non alter a measurings categorization.Table 3.1 Steven ‘s Measurement SystemType of Measurement Basic empirical operation Examples Nominal Determination of equality of classs. Religion, Race, Eye colour, Gender, etc. Ordinal Determination of greater than or less than ( ranking ) . Rating of pupils, Ranking of the BP as low, medium, high etc. Time interval Determination of equality of differences between degrees. Temperature etc. Ratio Determination of equality of ratios of degrees. Height, Weight, etc. Variable of the survey are of categorical in nature and holding nominal and ordinal type of measuring.3.4 Variables of Analysis:Since the chief focal point of this survey is on the association of different hazard factors with the presence of HBV and HCV. Therefore, the person in the informations were loosely classified into three groups. This categorization is based on whether an person is a bearer of HBV, HCV or None of these. Following table explains this categorization.Table 3.2 Categorization of PersonsNo.SampleHepatitisPercentageI 100 No 38.2 Two 19 HBV 7.3 Three 143 HCV 54.6 Entire 262— –1003.4.1 Categorization of Predictor Variables:Nominal type variables and cryptography is: Sexual activity Male: 1 Female: 2 Area Urban: 1 Rural: 2 Marital Status Single: 1 Married: 2 Hepatitis Type No: 1 B: 2 C: 3 Profession: No:1 Farmer:2 Factory:3 Govt. :4 5: Shop Keeper Jaundice Yes: 1 No: 2 History Blood Transfusion Yes: 1 No: 2 History Surgery Yes: 1 No 2 Family History Yes: 1 No: 2 Smoking Yes: 1 No: 2 Diabetess Yes: 1 No: 2 Ordinal type variable and cryptography is: Age 11 to 20: 1 21 to 30: 2 31 to 40: 3 41 to 50: 4 51 to 60: 5 Education: Primary: 1 Middle: 2 Metric: 3 Fas: 4 BA: 5 University: 63.5 Statistical Analysis:The appropriate statistical analysis techniques to accomplish the aims of the survey include frequence distribution, per centums and eventuality tabular arraies among the of import variables. In multivariate analysis, comparing of Logistic Regression and Classification trees is made. The statistical bundle SPSS was used for the intent of analysis.3.6 Logistic Arrested development:Logistic arrested development is portion of statistical theoretical accounts called generalised additive theoretical accounts. This broad category of theoretical accounts includes ordinary arrested development and analysis of discrepancy, every bit good as multivariate statistics such as analysis of covariance and Loglinear arrested development. A enormous intervention of generalised additive theoretical accounts is presented in Agresti ( 1996 ) . Logistic arrested development analysis surveies the relationship between a categorical response variable and a set of independent ( explanatory ) variables. The name logistic arrested development is frequently used when the dependant variable has merely two values. The name multiple-group logistic arrested development ( MGLR ) is normally reserved for the instance when the response variable has more than two alone values. Multiple-group logistic arrested development is sometimes called polynomial logistic arrested development, polytomous logistic arrested development, polychotomous logistic arrested development, or nominal logistic arrested development. Although the information construction is different from that of multiple arrested developments, the practical usage of the process is similar. Logistic arrested development competes with discriminant analysis as a method for analysing distinct dependent variables. In fact, the current esthesis among many statisticians is that logistic arrested development is more adaptable and superior for most state of affairss than is discriminant analysis because logistic arrested development does non presume that the explanatory variables are usually distributed while discriminant analysis does. Discriminant analysis can be used merely in instance of uninterrupted explanatory variables. Therefore, in cases where the forecaster variables are categorical, or a mixture of uninterrupted and categorical variables, logistic arrested development is preferred. Provided logistic arrested development theoretical account does non affect determination trees and is more similar to nonlinear arrested development such as suiting a multinomial to a set of informations values.3.6.1 The Logit and Logistic Transformations:In multiple arrested development, a mathematical theoretical account of a set of explanatory variables is used to foretell the mean of the dependant variable. In logistic arrested development, a mathematical theoretical account of a set of explanatory variable is used to foretell a transmutation of the dependant variable. This is logit transmutation. Suppose the numerical values of 0 and 1 are assigned to the two classs of a binary variable. Often, 0 represents a negative response and a 1 represents a positive response. The mean of this variable will be the proportion of positive responses. Because of this, we might seek to pattern the relationship between the chance ( proportion ) of a positive response and explanatory variable. If P is the proportion of observations with a response of 1, so 1-p is the chance of a response of 0. The ratio p/ ( 1-p ) is called the odds and the logit is the logarithm of the odds, or merely log odds. Mathematically, the logit transmutation is written as The following tabular array shows the logit for assorted values of P.Table 3.3 Logit for Various Values of PPhosphorusLogit ( P )PhosphorusLogit ( P )0.001 -6.907 0.999 6.907 0.010 -4.595 0.990 4.595 0.05 -2.944 0.950 2.944 0.100 -2.197 0.900 2.197 0.200 -1.386 0.800 1.386 0.300 -0.847 0.700 0.847 0.400 -0.405 0.600 0.405 0.500 0.000— —— —Note that while P ranges between zero and one, the logit scopes between subtraction and plus eternity. Besides note that the nothing logit occurs when P is 0.50. The logistic transmutation is the opposite of the logit transmutation. It is written as3.6.2 The Log Odds Transformation:The difference between two log odds can be used to compare two proportions, such as that of males versus females. Mathematically, this difference is written This difference is frequently referred to as the log odds ratio. The odds ratio is frequently used to compare proportions across groups. Note that the logistic transmutation is closely related to the odds ratio. The contrary relationship is3.7 The Multinomial Logistic Regression and Logit Model:In multiple-group logistic arrested development, a distinct dependant variable Y holding G alone values is a regressed on a set of p independent variables. Y represents a manner of partitioning the population of involvement. For illustration, Y may be presence or absence of a disease, status after surgery, a matrimonial position. Since the names of these dividers are arbitrary, refer to them by back-to-back Numberss. Y will take on the values 1, 2, aˆÂ ¦ , G. Let The logistic arrested development theoretical account is given by the G equations Here, is the chance that an single with values is in group g. That is, Normally ( that is, an intercept is included ) , but this is non necessary. The quantities represent the anterior chances of group rank. If these anterior chances are assumed equal, so the term becomes zero and drops out. If the priors are non assumed equal, they change the values of the intercepts in the logistic arrested development equation. The arrested development coefficients for the mention group set to zero. The pick of the mention group is arbitrary. Normally, it is the largest group or a control group to which the other groups are to be compared. This leaves G-1 logistic arrested development equations in the polynomial logistic arrested development theoretical account. are population arrested development coefficients that are to be estimated from the informations. Their estimations are represented by B ‘s. The represents the unknown parametric quantities, while the B ‘s are their estimations. These equations are additive in the logits of p. However, in footings of the chances, they are nonlinear. The corresponding nonlinear equations are Since =1 because all of its arrested development coefficients are zero. Frequently, all of these theoretical accounts referred to as logistic arrested development theoretical accounts. However, when the independent variables are coded as ANOVA type theoretical accounts, they are sometimes called logit theoretical accounts. can be interpreted as that This shows that the concluding value is the merchandise of its single footings.3.7.1 Solving the Likelihood Equation:To better notation, allow The likeliness for a sample of N observations is so given by where is one if the observation is in group g and zero otherwise. Using the fact that =1, the likeliness, L, is given by Maximal likeliness estimations of are found by happening those values that maximize this log likeliness equation. This is accomplished by ciphering the partial derived functions and so equates them to zero. The ensuing likeliness equations are For g = 1, 2, aˆÂ ¦ , G and k = 1, 2, aˆÂ ¦ , p. Actually, since all coefficients are zero for g=1, the scope of g is from 2 to G. Because of the nonlinear nature of the parametric quantities, there is no closed-form solution to these equations and they must be solved iteratively. The Newton-Raphson method as described in Albert and Harris ( 1987 ) is used to work out these equations. This method makes usage of the information matrix, , which is formed from the 2nd partial derived function. The elements of the information matrix are given by The information matrix is used because the asymptotic covariance matrix is equal to the opposite of the information matrix, i.e. This covariance matrix is used in the computation of assurance intervals for the arrested development coefficients, odds ratios, and predicted chances.3.7.2 Interpretation of Regression Coefficients:The reading of the estimated arrested development coefficients is non easy as compared to that in multiple arrested development. In polynomial logistic arrested development, non merely is the relationship between X and Y nonlinear, but besides, if the dependant variable has more than two alone values, there are several arrested development equations. See the simple instance of a binary response variable, Y, and one explanatory variable, X. Assume that Y is coded so it takes on the values 0 and 1. In this instance, the logistic arrested development equation is Now consider impact of a unit addition in X. The logistic arrested development equation becomes We can insulate the incline by taking the difference between these two equations. We have That is, is the log of the odds at X+1 and X. Removing the logarithm by exponentiating both sides gives The arrested development coefficient is interpreted as the log of the odds ratio comparing the odds after a one unit addition in X to the original odds. Note that, unlike the multiple arrested developments, the reading of depends on the peculiar value of X since the chance values, the P ‘s, will change for different X.3.7.3 Binary Independent Variable:When Ten can take on merely two values, say 0 and 1, the above reading becomes even simpler. Since there are merely two possible values of X, there is a alone reading for given by the log of the odds ratio. In mathematical term, the significance of is so To wholly understand, we must take the logarithm of the odds ratio. It is hard to believe in footings of logarithms. However, we can retrieve that the log of one is zero. So a positive value of indicates that the odds of the numerator are big while a negative value indicates that the odds of the denominator are larger. It is probability easiest to believe in footings of instead than a, because is the odds ratio while is the log of the odds ratio.3.7.4 Multiple Independent Variables:When there are multiple independent variables, the reading of each arrested development coefficient more hard, particularly if interaction footings are included in the theoretical account. In general nevertheless, the arrested development coefficient is interpreted the same as above, except that the caution ‘holding all other independent variables changeless ‘ must be added. That is, can the values of this independent variable be increased by one without altering any of the other variables. If it can, so the reading is as earlier. If non, so some type of conditional statement must be added that histories for the values of the other variables.3.7.5 Polynomial Dependent Variable:When the dependant variable has more than two values, there will be more than one arrested development equation. Infect, the figure of arrested development equation is equal to one less than the figure of categories in dependent variables. This makes reading more hard because there is several arrested development coefficients associated with each independent variable. In this instance, attention must be taken to understand what each arrested development equation is anticipation. Once this is understood, reading of each of the k-1 arrested development coefficients for each variable can continue as above. For illustration, dependant variable has three classs A, B and C. Two arrested development equations will be generated matching to any two of these index variables. The value that is non used is called the mention class value. As in this instance C is taken as mention class, the arrested development equations would be The two coefficients for in these equations, , give the alteration in the log odds of A versus C and B versus C for a one unit alteration in, severally.3.7.6 Premises:On logistic arrested development the existent limitation is that the result should be distinct. One-dimensionality in the logit i.e. the logistic arrested development equation should be additive related with the logit signifier of the response variable. No outliers Independence of mistakes. No Multicollinearity.3.8 Categorization Trees:To foretell the rank of each category or object in instance of categorical response variable on the footing of one or more forecaster variables categorization trees are used. The flexibleness ofA categorization trees makes them a really dramatic analysis choice, but it can non be said that their usage is suggested to the skip of more traditional techniques. The traditional methods should be preferred, in fact, when the theoretical and distributional premises of these methods are fulfilled. But as an option, or as a technique of last option when traditional methods fail, A categorization treesA are, in the sentiment of many research workers, unsurpassed.The survey and usage ofA categorization treesA are non prevailing in the Fieldss of chance and statistical theoretical account sensing ( Ripley, 1996 ) , butA categorization treesA are by and large used in applied Fieldss as in medical specialty for diagnosing, computing machine scientific discipline to measure informations constructions, vegetation for categorization, and in psychological science for doing determination theory.A Classification trees thirstily provide themselves to being displayed diagrammatically, functioning to do them easy to construe. Several tree turning algorithms are available. In this survey three algorithms are used CART ( Classification and Regression Tree ) , CHAID ( Chi-Square Automatic Interaction Detection ) , and QUEST ( Quick Unbiased Efficient Statistical Tree ) .3.9 CHAID Algorithm:The CHAID ( Chi-Square Automatic Interaction Detection ) algorithm is originally proposed by Kass ( 1980 ) . CHAID algorithm allows multiple splits of a node. This algorithm merely accepts nominal or ordinal categorical forecasters. When forecasters are uninterrupted, they are transformed into ordinal forecasters before utilizing this algorithm It consists of three stairss: meeting, splitting and fillet. A tree is grown by repeatedly utilizing these three stairss on each node get downing organize the root node.3.9.1. Merging:For each explanatory variable Ten, unify non-significant classs. If X is used to divide the node, each concluding class of X will ensue in one kid node. Adjusted p-value is besides calculated in the confluent measure and this P value is to be used in the measure of splitting. If there is merely one class in X, so halt the process and set the adjusted p-value to be 1. If X has 2 classs, the adjusted p-value is computed for the merged classs by using Bonferroni accommodations. Otherwise, happen the sensible brace of classs of X ( a sensible brace of classs for ordinal forecaster is two next classs, and for nominal forecaster is any two classs ) that is least significantly different ( i.e. more similar ) . The most kindred brace is the brace whose trial statistic gives the highest p-value with regard to the response variable Y. For the brace holding the highest p-value, look into if its p-value is larger than significance-level. If it is larger than significance degree, this brace is merged into a individual compound class. Then a new set of classs of that explanatory variable is formed. If the freshly created compound class consists of three or more original classs, so happen the best binary split within the compound class for which p-value is the smallest. Make this binary split if its p-value is non greater than significance degree. The adjusted p-value is computed for the merged classs by using Bonferroni accommodation. Any class holding excessively few observations is merged with the most likewise other class as measured by the largest of the p-value. The adjusted p-value is computed for the merged classs by using Bonferroni accommodation.3.9.2. Splitting:The best split for each explanatory variable is found in the measure of unifying. The rending measure selects which predictor to be used to outdo split the node. Choice is accomplished by comparing the adjusted p-value associated with each forecaster. The adjusted p-value is obtained in the confluent measure. Choose the independent variable that has minimum adjusted p-value ( i.e. most important ) . If this adjusted p-value is less than or equal to a user-specified alpha-level, split the node utilizing this forecaster. Else, do non divide and the node is considered as a terminal node.3.9.3. Fillet:The stopping measure cheques if the tree turning procedure should be stopped harmonizing to the following fillet regulations. If a node becomes pure ; that is, all instances in a node have indistinguishable values of the dependant variable, the node will non be split. If all instances in a node have indistinguishable values for each forecaster, the node will non be split. If the current tree deepness reaches the user specified maximal tree deepness bound value, the tree turning procedure will halt. If the size of a node is less than the user-specified minimal node size value, the node will non be split. If the split of a node consequences in a kid node whose node size is less than the user-specified minimal kid node size value, child nodes that have excessively few instances ( as compared with this lower limit ) will unify with the most similar kid node as measured by the largest of the p-values. However, if the ensuing figure of child nodes is 1, the node will non be split.3.9.4 P-Value Calculation in CHAID:Calculations of ( unadjusted ) p-values in the above algorithms depend on the type of dependent variable. The confluent measure of CHAID sometimes needs the p-value for a brace of X classs, and sometimes needs the p-value for all the classs of X. When the p-value for a brace of X classs is needed, merely portion of informations in the current node is relevant. Let D denote the relevant information. Suppose in D, X has I classs and Y ( if Y is categorical ) has J classs. The p-value computation utilizing informations in D is given below. If the dependant variable Y is nominal categorical, the void hypothesis of independency of X and Y is tested. To execute the trial, a eventuality ( or count ) tabular array is formed utilizing categories of Y as columns and classs of the forecaster X as rows. The expected cell frequences under the void hypothesis are estimated. The ascertained and the expected cell frequences are used to cipher the Pearson chi-squared statistic or to cipher the likeliness ratio statistic. The p-value is computed based on either one of these two statistics. The Pearson ‘s Chi-square statistic and likeliness ratio statistic are, severally, Where is the ascertained cell frequence and is the estimated expected cell frequence, is the amount of ith row, is the amount of jth column and is the expansive sum. The corresponding p-value is given by for Pearson ‘s Chi-square trial or for likeliness ratio trial, where follows a chi-squared distribution with d.f. ( J-1 ) ( I-1 ) .3.9.5 Bonferroni Adjustments:The adjusted p-value is calculated as the p-value times a Bonferroni multiplier. The Bonferroni multiplier adjusts for multiple trials. Suppose that a forecaster variable originally has I classs, and it is reduced to r classs after the confluent stairss. The Bonferroni multiplier B is the figure of possible ways that I classs can be merged into R classs. For r=I, B=1. For use the undermentioned equation.3.10 QUEST Algorithm:QUEST is proposed by Loh and Shih ( 1997 ) as a Quick, Unbiased, Efficient, Statistical Tree. It is a tree-structured categorization algorithm that yields a binary determination tree. A comparing survey of QUEST and other algorithms was conducted by Lim et Al ( 2000 ) . The QUEST tree turning procedure consists of the choice of a split forecaster, choice of a split point for the selected forecaster, and halting. In QUEST algorithm, univariate splits are considered.3.10.1 Choice of a Split Forecaster:For each uninterrupted forecaster X, execute an ANOVA F trial that trials if all the different categories of the dependant variable Y have the same mean of X, and cipher the p-value harmonizing to the F statistics. For each categorical forecaster, execute a Pearson ‘s chi-square trial of Y and X ‘s independency, and cipher the p-value harmonizing to the chi-square statistics. Find the forecaster with the smallest p-value and denote it X* . If this smallest p-value is less than I ± / M, where I ± ( 0,1 ) is a degree of significance and M is the entire figure of forecaster variables, forecaster X* is selected as the split forecaster for the node. If non, travel to 4. For each uninterrupted forecaster X, compute a Levene ‘s F statistic based on the absolute divergence of Ten from its category mean to prove if the discrepancies of X for different categories of Y are the same, and cipher the p-value for the trial. Find the forecaster with the smallest p-value and denote it as X** . If this smallest p-value is less than I ±/ ( M + M1 ) , where M1 is the figure of uninterrupted forecasters, X** is selected as the split forecaster for the node. Otherwise, this node is non split.3.10.1.1 Pearson ‘s Chi-Square Trial:Suppose, for node T, there are Classs of dependent variable Yttrium. The Pearson ‘s Chi-Square statistic for a categorical forecaster Ten with classs is given by3.10.2 Choice of the Split Point:At a node, suppose that a forecaster variable Ten has been selected for dividing. The following measure is to make up one's mind the split point. If X is a uninterrupted forecaster variable, a split point vitamin D in the split Xa†°Ã‚ ¤d is to be determined. If X is a nominal categorical forecaster variable, a subset K of the set of all values taken by X in the split XK is to be determined. The algorithm is as follows. If the selected forecaster variable Ten is nominal and with more than two classs ( if X is binary, the split point is clear ) , QUEST foremost transforms it into a uninterrupted variable ( name it I? ) by delegating the largest discriminant co-ordinates to classs of the forecaster. QUEST so applies the split point choice algorithm for uninterrupted forecaster on I? to find the split point.3.10.2.1 Transformation of a Categorical Predictor into a Continuous Forecaster:Let X be a nominal categorical forecaster taking values in the set Transform X into a uninterrupted variable such that the ratio of between-class to within-class amount of squares of is maximized ( the categories here refer to the categories of dependent variable ) . The inside informations are as follows. Transform each value ten of X into an I dimensional silent person vector, where Calculate the overall and category J mean of V. where N is a specific instance in the whole sample, frequence weight associated with instance N, is the entire figure of instances and is the entire figure of instances in category J. Calculate the undermentioned IA-I matrices. Perform individual value decomposition on T to obtain where Q is an IA-I extraneous matrix, such that Let where if 0 otherwise. Perform individual value decomposition on to obtain its eigenvector which is associated with its largest characteristic root of a square matrix. The largest discriminant co-ordinate of V is the projection3.10.3 Fillet:The stopping measure cheques if the tree turning procedure should be stopped harmonizing to the following fillet regulations. If a node becomes pure ; that is, all instances belong to the same dependant variable category at the node, the node will non be split. If all instances in a node have indistinguishable values for each forecaster, the node will non be split. If the current tree deepness reaches the user-specified maximal tree deepness bound value, the tree turning procedure will halt. If the size of a node is less than the user-specified minimal node size value, the node will non be split. If the split of a node consequences in a kid node whose node size is less than the user-specified minimal kid node size value, the node will non be split.3.11 CART Algorithm:Categorization and Regression Tree ( C & A ; RT ) or ( CART ) is given by Breiman et Al ( 1984 ) . CART is a binary determination tree that is constructed by dividing a node into two kid nodes repeatedly, get downing with the root node that contains the whole acquisition sample. The procedure of ciphering categorization and arrested development trees can be involved four basic stairss: Specification of Criteria for Predictive Accuracy Split Selection Stoping Right Size of the Tree A3.11.1 Specification of Criteria for Predictive Accuracy:The categorization and arrested development trees ( C & A ; RT ) algorithms are normally aimed at accomplishing the greatest possible prognostic truth. The anticipation with the least cost is defined as most precise anticipation. The construct of costs was developed to generalise, to a wider scope of anticipation state of affairss, the idea that the best anticipation has the minimal misclassification rate. In the bulk of applications, the cost is measured in the signifier of proportion of misclassified instances, or discrepancy. In this context, it follows, hence, that a anticipation would be considered best if it has the lowest misclassification rate or the smallest discrepancy. The demand of minimising costs arises when some of the anticipations that fail are more catastrophic than others, or the failed anticipations occur more frequently than others.3.11.1.1 Priors:In the instance of a qualitative res ponse ( categorization job ) , costs are minimized in order to minimise the proportion of misclassification when priors are relative to the size of the category and when for every category costs of misclassification are taken to be equal. The anterior chances those are used in minimising the costs of misclassification can greatly act upon the categorization of objects. Therefore, attention has to be taken for utilizing the priors. Harmonizing to general construct, to set the weight of misclassification for each class the comparative size of the priors should be used. However, no priors are required when one is constructing a arrested development tree.3.11.1.2 Misclassification Costss:Sometimes more accurate categorization of the response is required for a few categories than others for grounds non related to the comparative category sizes. If the decisive factor for prognostic truth is Misclassification costs, so minimising costs would amount to minimising the proportion of misclassification at the clip priors are taken relative to the size of categories and costs of misclassification are taken to be the same for every category. A3.11.2 Split Choice:The following cardinal measure in categorization and arrested develop ment trees ( CART ) is the choice of splits on the footing of explanatory variables, used to foretell rank in instance of the categorical response variables, or for the anticipation uninterrupted response variable. In general footings, the plan will happen at each node the split that will bring forth the greatest betterment in prognostic truth. This is normally measured with some type of node dross step, which gives an indicant of the homogeneousness of instances in the terminal nodes. If every instance in each terminal node illustrate equal values, so node dross is smallest, homogeneousness is maximum, and anticipation is ideal ( at least for the instances those were used in the computations ; prognostic cogency for new instances is of class a different affair ) . In simple words it can be said that Necessitate a step of dross of a node to assist make up one's mind on how to divide a node, or which node to divide The step should be at a upper limit when a node is every bit divided amongst all categories The dross should be zero if the node is all one category3.11.2.1 Measures of Impurity:There are many steps of dross but following are the good known steps. Misclassification Rate Information, or Information Gini Index In pattern the misclassification rate is non used because state of affairss can happen where no split improves the misclassification rate and besides the misclassification rate can be equal when one option is clearly better for the following measure.3.11.2.2 Measure of Impurity of a Node:Achieves its upper limit at ( , ,aˆÂ ¦ , ) = ( , ,aˆÂ ¦ , ) Achieves its lower limit ( normally zero ) when one = 1, for some I, and the remainder are zero. ( pure node ) Symmetrical map of ( , ,aˆÂ ¦ , )Gini index:I ( T ) = = 1 –Information:3.11.2.3 To Make a Split at a Node:See each variable, ,aˆÂ ¦ , Find the split for that gives the greatest decrease in Gini index for dross i.e. maximise ( 1 – ) – make this for j=1,2, aˆÂ ¦ , P Use the variables that gives the best split, If cost of misclassification are unequal, CART chooses a split to obtain the biggest decrease in I ( T ) = C ( one | J ) = [ C ( one | J ) + C ( j | I ) ] priors can be incorporated into the costs )3.11.3 Fillet:In chief, splitting could go on until all instances are absolutely classified or predicted. However, this would n't do much sense since one would probably stop up with a tree construction that is as complex and â€Å" boring † as the original informations file ( with many nodes perchance incorporating individual observations ) , and that would most likely non be really utile or accurate for foretelling new observations. What is required is some sensible fillet regulation. Two methods can be used to maintain a cheque on the splitting procedure ; viz. Minimum N and Fraction of objects.3.11.3.1 Minimal N:To make up one's mind about the fillet of the splits, splitting is permitted to go on until all the terminal nodes are pure or they are more than a specified figure of objects in the terminal node.3.11.3.2 Fraction of Objects:Another manner to make up one's mind about the fillet of the spli ts, splitting is permitted to go on until all the terminal nodes are pure or there are a specified smallest fraction of the size of one ore more classs in the response variable. For categorization jobs, if the priors are tantamount and category sizes are same as good, so we will halt splitting when all terminal nodes those have more than one class, have no more instances than the defined fraction of the size of class for one or more classs. On the other manus, if the priors which are used in the analysis are non equal, one would halt splitting when all terminal nodes for which two or more categories have no more instances than defined fraction for one or more categories ( Loh and Vanichestakul, 1988 ) .3.11.4 Right Size of the Tree:The majority of a tree in the C & A ; RT ( categorization and arrested development trees ) analysis is an of import affair, since an unreasonably big tree makes the reading of consequences more complicated. Some generalisations can be presented about what constitutes the accurate size of the tree. It should be adequately complex to depict for the acknowledged facts, but it should be every bit easy as possible. It should use inform ation that increases prognostic truth and pay no attending to information that does non. It should demo the manner to the larger apprehension of the phenomena. One attack is to turn the tree up to the right size, where the size is specify by the user, based on the information from anterior research, analytical information from earlier analyses, or even perceptual experience. The other attack is to utilize a set of well-known, structured processs introduced by Breiman et Al. ( 1984 ) for the choice of right size of the tree. These processs are non perfect, as Breiman et Al. ( 1984 ) thirstily acknowledge, but at least they take subjective sentiment out of the procedure to choose the right-sized tree. A There are some methods to halt the splitting.3.11.4.1 Test Sample Cross-Validation:The most preferable sort of cross-validation is the trial sample cross-validation. In this kind of cross-validation, the tree is constructed from the larning sample, and trial sample is used to look into the prognostic truth of this tree. If test sample costs go beyond the costs for the acquisition sample, so this is an indicant of hapless cross-validation. In this instance, some other sized tree may cross-validate healthier. The trial samples and larning samples can be made by taking two independent informations sets, if a larger learning sample is gettable, by reserving a randomly chosen proportion ( say one 3rd or one half ) of the instances for utilizing as the trial sample. A Split the N units in the preparation sample into V- groups of â€Å" equal † size. ( V=10 ) Construct a big tree and prune for each set of V-1 groups. Suppose group V is held out and a big tree is built from the combined informations in the other V-1 groups. Find the â€Å" best † subtree for sorting the instances in group V. Run each instance in group V down the tree and calculate the figure that are misclassified. R ( T ) = R ( T ) + Number of nodes in tree T Complexity parametric quantity Number misclassified With tree T Find the â€Å" weakest † node and snip off all subdivisions formed by dividing at that node. ( examine each non terminal node ) I ) Check each brace of terminal nodes and prune if 13S 3 F Number misclassified at node T = 3 7 S 3 F 6 S 0 F=0 = 3 13S 3 F so do a terminal node. two ) Find the following â€Å" weakest † node. For the t-th node compute R ( T ) = R ( T ) + Number of nodes at or below node T Number misclassified If all subdivisions from node T are kept R ( T ) = = R ( T ) should snip if R ( T ) R ( T ) this occurs when at each non terminal node compute the smallest value of such that the node with the smallest such is the weakest node and all subdivisions below it should be pruned off. It so becomes a terminal node. Produce a sequence of trees this is done individually for V= 1,2, aˆÂ ¦ , V.3.11.4.2 V-fold Cross-Validation:The 2nd type of cross-validation is V-fold cross-validation. This type of cross-validation is valuable when trial sample is non available and the acquisition sample is really little that test sample can non be taken from it. The figure of random bomber samples are determined by the user specified value ( called ‘v ‘ value ) for V-fold cross proof. These sub samples are made from the acquisition samples and they should be about equal in size. A tree of the specified size is calculated ‘v ‘ A times, each clip go forthing out one of the bomber samples from the calculations, and utilizing that sub sample as a trial sample for cross-validation, with the purpose that each bomber sample is considered ( 5 – 1 ) times within the learning sample and merely one time as the trial sample. The cross proof costs, calculated for all ‘v ‘ trial samples, are averaged to show the v-fold estimation of the cross proof costs.

Victor is the True Villain of Frankenstein Essay - 1248 Words

At first glance, the monster in Frankenstein is a symbol of evil, whose only desire is to ruin lives. He has been called A creature that wreaks havoc by destroying innocent lives often without remorse. He can be viewed as the antagonist, the element Victor must overcome to restore balance and tranquility to the world. But after the novel is looked at on different levels, one becomes aware that the creature wasnt responsible for his actions, and was just a victim of circumstance. The real villain of Frankenstein isnt the creature, but rather his creator, Victor. As a romantic novel Victor is responsible, because he abandoned his creation. As an archetype novel, Victor is the villain, because he was trying to play god. Finally,†¦show more content†¦. . This is another example of how the creature wanted someone to talk to him and be his friend, and that person should have been Victor. Victor is also a villain in a Archetype sense. Victor was trying to play god, when he created the creature, and that is something he shouldnt have done, because humans cant become too powerful, even though they always try. Victor became so obsessed with creating life, that it clouded his judgment, and took up all of his time and energy. On page 66, just before Justines trial, Victor thought to himself, During the whole of this wretched mockery of justice I suffered living torture. It was to be whether the result of my curiosity and lawless devices would cause the death of two of my fellow beings. This line shows two things, first Victor knew that Justine, and Williams death was his fault. Also, he knew that his experiments, shouldnt have been done, and were against the laws of nature and god. On page 39, Victor says, Life and death appeared to me ideal bounds, which I should first break through, and pour a torrent of light into our dark world. A new species would bless me as its crea tor and source, many happy and excellent natures would owe their being to me. This quote shows how Victor wanted to be like a god. He wanted to be admired, and praised as a species creator. And this want is another reason he was the real villain of Frankenstein. Finally,Show MoreRelatedWho Is The Villain? - Frankenstein Or The Monster?1206 Words   |  5 PagesWho is the Villain? – Frankenstein or the Monster? Every story has its hero and villain. Some authors’ works easily clarify the debate between which character is the ultimate protagonist or the antagonist, but sometimes the author tries to toy with readers’ minds. Similarly, Frankenstein’s author, Marry Shelley is one of the authors who is not straightforward about who is the villain in her novel. 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