Nucleosynthesis Essays - Nuclear Physics, Nuclear Chemistry

Nucleosynthesis Essays - Nuclear Physics, Nuclear Chemistry Nucleosynthesis The big bang which created the universe, only created the elements Hydrogen (H) and Helium (He) and possibly a very small amount of Lithium (Li). However, a glance at the periodic table of the elements shows that today (some 15 billion years after the big bang) there are at least 108 known elements. Every atom of every element heavier than Li has been produced since the big bang! The factories which make these elements are stars. Nucleosynthesis or the synthesis of nuclei, is the process by which stars (which start out consisting mostly of H and He) produce all other elements. The key is nuclear fusion, in which small nuclei are joined together to form a larger nucleus. (This contrasts with nuclear fission, in which a large nucleus breaks apart to form two smaller nuclei). Fusion requires an extremely large amount of energy (see fig. 1), and can typically only take place in the centers of stars. FIGURE 1 a) Low energy proton is strongly repelled by the 7Be nucleus.b) High energy proton moves so fast that it can strike the 7Be nucleus. Once the proton touches the nucleus, it has a chance to stick. If the proton sticks, the 7Be becomes a 8B nucleus.c) 8B is radioactive and changes into 8Be plus a positron (b+) and a neutrino (n). 8Be is itself radioactive, and almost immediately breaks into two 4He nuclei. Protons repel each other. This repulsion becomes stronger as the protons get closer together (just like when you try to stick two magnets together north to north, or south to south. Try this! As you push the magnets closer together, it becomes harder to do). However, if the protons can actually touch each other, they have a chance to stick together! This is because of the strong nuclear force which attracts nucleons (protons or neutrons) together, and is much stronger (at close range) than the electromagnetic force repulsion that makes protons repel other protons. (Magnets do not do this: two like poles will never stick together). In order to get a proton to strike another proton (or a nucleus that contains several protons) they must be traveling at high relative speeds; if their closing velocity is not great enough, they will never get close enough to stick together, because they strongly repel each other. But, just as you can make two of the same magnetic poles touch each other by providing sufficient force, so too can protons touch when they have sufficient relative speed. This can take place in the center of the sun, where the temperature is extremely high. Temperature is related to atomic motion: the hotter something is, the faster its atoms are moving [] see demo food coloring in water[]. Table 1 shows the nuclear reactions that are taking place in our sun, as well as nuclear reactions that take place in stars that are either older than our sun, or hotter than our sun. The reactions in columns 2 and 3 occur after a star has entered the red giant phase. How fast a star evolves to this point depends on its mass: stars heavier than the sun can reach this phase in less than 5 billion years (the age of the sun) whereas stars with about our sun's mass take about 10 billion years to get there. The particles you may be unfamiliar with are: n the neutrino, g a gamma ray (high energy light wave), and b+ the positron (the antimatter version of the electron). TABLE 1. NUCLEAR REACTIONS IN STARS OUR SUN NOW OLDER, OR HOTTER STARS p + p 2H + b+ + n 4He + 4He 8Be + g 12C + p 13N + g 2H + p 3He + g 8Be + 4He 12C + g 13N 13C + b+ + n 3He + 3He 4He + p + p 12C + 4He 16O + g T1/2 = 10 min 16O + 4He 20Ne + g 13C + p 14N + g 3He + 4He 7Be + g 20Ne + 4He 24Mg + g 14N + p 15O + g 7Be + p 8B + g 15O 15N + b+ + n 8B 8Be + b+ + n T1/2 = 120 ms 8Be 4He + 4He 15N + p 12C + 4He He burning (core) H

An Introduction to Puritanism

An Introduction to Puritanism Puritanism was a religious  reformation movement  that began in England in the late 1500s. Its initial goal was to remove any remaining links to Catholicism within the  Church of England (Anglican Church) after its separation from the Catholic Church. To do this, Puritans sought to change the structure and ceremonies of the church. They also wanted broader lifestyle changes in England to align with their strong moral beliefs. Some Puritans emigrated to the New World and established colonies built around churches that fit these beliefs.  Puritanism had a broad impact on England’s religious laws as well as the founding and development of the colonies in America. Beliefs Some Puritans believed in total separation from the Church of England, while others simply sought reform, wishing to remain a part of the church. Uniting these two factions was the belief that the church should not have any rituals or ceremonies not found in the Bible. They believed that the government should enforce morals and punish behavior such as drunkenness and swearing. Puritans, however, did believe in religious freedom and generally respected the differences in belief systems of those outside the Church of England.   Some of the major disputes between the Puritans and the Anglican church regarded the Puritan beliefs that priests should not wear vestments (clerical clothing), that ministers should actively spread the word of God, and that the church hierarchy (of bishops, archbishops, etc.) should be replaced with a committee of elders.   Regarding their personal relationships with God, Puritans believed that salvation was entirely up to God and that God had chosen only a select few to be saved, yet no one could know if they were among this group. They also believed that each person should have a personal covenant with God. The Puritans were influenced by  Calvinism and adopted its beliefs in predestination and the sinful nature of man. Puritans believed that all people must live by the Bible and should have a deep familiarity with the text. To achieve this, Puritans placed a strong emphasis on literacy and education.   Puritans in England Puritanism first emerged in the 16th and 17th centuries in England as a movement to remove all vestiges of Catholicism from the Anglican Church. The Anglican Church first separated from Catholicism in 1534, but when Queen Mary took the throne in 1553, she reverted it to Catholicism. Under Mary, many Puritans faced exile. This threat, combined with the increasing prevalence of Calvinism, which provided writings that supported their viewpoint, further strengthened Puritan beliefs. In 1558, Queen Elizabeth  I took the throne and re-established the separation from Catholicism, but not thoroughly enough for the Puritans. The group rebelled and, as a result, were prosecuted for refusing to abide by laws that required specific religious practices. This was one factor that led to the eruption of the English civil war between the Parliamentarians and the Royalists in 1642, fought in part over religious freedom.   Puritans in America   In 1608, some Puritans moved from England to Holland, where, in 1620, they boarded the Mayflower to Massachusetts, where they would establish Plymouth Colony. In 1628, another group of Puritans founded the Massachusetts Bay Colony. Puritans eventually spread throughout New England, establishing new self-governing churches. In order to become a full member of the church, seekers were required to give testimony of a personal relationship with God. Only those who could demonstrate a godly lifestyle were permitted to join.   The witch trials of the late 1600s in places like Salem, Massachusetts, were run by the Puritans and fueled by their religious and moral beliefs. But as the 17th century wore on, the cultural strength of the Puritans gradually waned. As the first generation of immigrants died out, their children and grandchildren became less connected with the church. By 1689, the majority of New Englanders thought of themselves as Protestants rather than Puritans, though many of them were just as sharply opposed to Catholicism.   As the religious movement in America eventually fractured into many groups (such as Quakers, Baptists, Methodists, and more), Puritanism became more of an underlying philosophy than a religion. It evolved into a way of life focused on self-reliance, moral sturdiness, tenacity, political isolationism, and excess-free living. These beliefs gradually evolved into a secular lifestyle that was (and sometimes is) thought of as a distinctly New England mentality.

Software Testing Research Paper Example | Topics and Well Written Essays - 1250 words

Software Testing - Research Paper Example We are dealing with the banking system from Pennywise National Bank. Therefore, experimental design is the best method of testing software (Basili and Selby, 1987). According to Gelperin and Hetzel (1988), we are going to deal with phase models and life cycle models. In the phase models, we have a demonstration and destruction phases. Demonstration ensures that the software satisfies all its specifications. Destruction involves detection of the implemented faults that may lead to errors during the software functioning. In the life cycle models, we have an evaluation and the prevention stages. In the evaluation, one detects requirements, design and implements faults. In prevention, requirements, design and implementation faults are prevented. Review of software requirements is not considered as testing. Prevention testing involves analysis and review besides improvement of the software specifications and design. Moreover, the code is improved before test execution (Gelperin and Hetzel, 1988). We are going to test the coding, structural and functional properties of our software. Code reading will be tested using the stepwise subtraction. The structural testing will be done using 1005 statement coverage criteria. Finally, the functional testing will be done using equivalence partitioning and analysis of the boundary value (Basili and Selby, 1987). The primary goals of testing are; to demonstrate that some parts of the software specifications are functional and meet their tasks, to detect faults and finally to prevent faults. Formerly constructive approach was being used in testing yielding unsatisfactory results in that it contained tests that the software could pass. Currently, the demonstration strategy is being used. Tests always are hypothesized that the software is not perfect in its specifications in that it can not lack even a single fault. A set of test T is built and applied to the software. In the long run, at least a single

Interview a job analyst- HR staff member Assignment

Interview a job analyst- HR staff member - Assignment Example This paper is therefore based on the interview between myself and the hospital job analyst to ascertain the type of job evaluation system they use and those who conduct the evaluation. Job evaluation is meant to rank jobs according to their relative worth in order to assign an equitable pay packages. However, the type of job evaluation systems used differ from one organizes to the next according to job evaluation analyst According to the hospital job analyst, evaluation of jobs is done using quantitative systems, since the hospital is complex and has many jobs done within it. They therefore use the following quantitative systems to evaluate their jobs: Under this method, they award points to different jobs based on the degree to which the job possess the compensable factors in comparison with the objective standards set for any particular job. In this case, different points are assigned to the jobs depending on the level of education required e.g. PHD or degree level, where those that require PHD level of education are assigned higher points compared to those that require only degree level. Similarly, different points are also awarded on the job depending on the nature and complexity of the job like the surgeons, which require high mental demands, will be assigned high point in ranking. This ensures that the right remuneration package is awarded depending on the number of points a job has. According to the analyst, this method has the advantage that the system can remain in operation for a long period of time before it is changed and it is also objective compared to other systems (Solomon, 1947) Factor comparison is also another system they use in the hospital to evaluate the different jobs. He however explains that this method is not so often used. Under this method of job evaluation, compensable factors are identified in determining

Gods Intervention in the world Essay Example for Free

Gods Intervention in the world Essay Explain what is meant by the bible describing God as a miracle worker? Miracles have been reported all over the world for thousands of years. In most scenarios miracles are related to God, and the activity of God within the world suggesting Gods imminence. The world miracle originates from the word miraculum meaning a thing of wonder. It is an interruption to the processes of nature that cannot be explained by natural laws and therefore a transgression. An interruption such as this normally bears some deeper and usually religious significance. The bible recites many ideas of miracles by either God or though Jesus. Within the old testament the story of Joshua and the Israelites. This story explains how he took his army to defend a place called Gibeon and that God was on the side of Joshua and helps them defeat the enemies of Gibeon. God does this by the interruption of natural laws such as pro longing the days, and throwing down a storm of hail. Other texts within the bible suggest miracles performed by God. For example during the story of Moses where he parts the reed sea in order for the Israelites to escape from the Egyptians. Another way miracles are shown within the bible is through Jesus. This is shown in such miracles as the feeding of 5000 and healing of the paralysed man Jesus was told to even bring people back to life. The bible uses these miracles to show Gods immanence within the world and his the relationship between God and humanity. miracles make it difficult to believe in a reliable god The idea of miracles is that they defy the laws of nature. That God Is transcendent but shows his power and goodness by interacting within the world as a miracle worker. For many who have experienced miracles they see it as an experience with God, for an example the theopany between God and Moses. However many issues are raised by the idea of God interfering in the lives of others. Firstly, some people see miracles as being morally unfair. They would say that if God was all good why would he interfere in the lives of some and not others. Why would a good God chose to help certain people and leave others to suffer. For example God helped the Jews many times within the bible whether it be in the story of Moses, Joshua or the feeding of 5000. However let them suffer through persecution so badly during the holocaust of world war two. Not only this but through the stories of Joshua and Moses God is choosing to help some people, in this case the Israelites but not the Egyptians or the enemies of Gibeon if God is the creator of everything in order to be morally correct God should be fair and just. Furthermore in some accounts of miracles from the bible God chooses to help a single person, how would God chose who to help and who to stay in suffering if God was just and fair. A miracle itself therefore contradicts Gods omnibenevolence. Miracles also make God uncertain. According to religious believers God is the creator of everything creation ex nihilo and yet for a miracle to exist God must work against his own creation to create a miracle. This questions Gods immanence as it goes against the idea that God is omniscient and never changing. By producing miracles the original laws created by God are uncertain and changeable. Why would a God that is all God and powerful need to work against his own creation there should be no need for miracles. God looked as his work and saw it was good. How could God be the creator of the earth and want to change how it works?Maurice wiles would agree with this arguing that God couldnt intervene on an individual level without undermining his whole creation. And that a good who could reject some suffering whilst choosing to help others it not worthy of worship. Although many follow this argument there are those who would say there does not need to be a choice between natural law and miracles, that they can co exist within the same world. That science can only develop by accepting new ideas of which miracles could be one. Also that miracles can have the same sorts of evidence as that of science, accounts by people, memories or physical traces left behind. David Hume is another philosopher who rejects that a reliable God cannot be a God of miracles. He suggests that miracles have nothing to do with God and that those talk of experiencing miraculous events are barbarous ignorant and gullible By this he means that the idea of God creating miracle is simply an excuse for those who cannot understand the true and natural reason for the occurrence. On the other hand there are those who would argue with the ideas of Hume and others sharing that opinion. They would say that although it is questionable as to whether miracles exist and are caused by God there is and equal lack of evidence to deny the occurrence of miracles. Equally that for a religious person it is not to question how God interacts within the world, just to have faith and accept that God is omnipotent, omni benevolent etc and that God must perform these miracles for a reason that is beyond the understanding of humans but is for a good cause.

William Wells Brown and the Jefferson and Hemings Scandal Essay example

William Wells Brown and the Jefferson and Hemings Scandal William Wells Brown wrote Clotel or The President's Daughter, a (fiction) novel based on the rumors surrounding Thomas Jefferson's affair with Sally Hemings, his slave. Brown learned of the scandal while working in several antislavery activities following his escape from slavery in 1834. Brown wanted not only to improve the social status of blacks and to support abolition through his writing, but also to encourage his readers to "develop a skeptical relationship to glorified stories of the national past" (Levine 15). He chose to write a novel that not only questioned slavery, but also questioned the validity of the principles that this nation was founded on. Rumors about the affair between Thomas Jefferson and Sally Hemings were circulating on a small scale after Hemings gave birth to several children who were noticeably light-skinned. Visitors as early as 1796 to Monticello, Jefferson's home in Virginia, often noted, "Mr. Jefferson's [slaves] had neither in their color nor features a single trace of their origin" (Rothman 87). It was clear to many that the slave children at Monticello were the result of interracial sexual relationships. Not until James Callender made a public accusation in 1802, however, did the scandal make its way into the press. James Callender was a supporter of Jeffersonian Republican politics, and he began writing political columns for the Philadelphia Gazette in the 1790s. His views were more extreme than those of the political party that he supported, however, and his writing was untactful. He attacked politicians who belonged to other parties, and exposed scandals where scandals could be found (or created?). He was eventually fire... ...lgram, Jeff. "In Jefferson-Hemings DNA test, media found failing: Research director sees 'biggest science story' as widely misinterpreted." Packet Online. 29 Apr. 2000 <http://www.google. com/imgres?imgurl=http://www.pacpubserver.com/new/new s/images/philosophicock. jpg&imgrefurl=http://www.pacpubserver. com/new/news /4-29 00/jefferson.html&h=325&w=326&sz=26&tbnid=hIml z3nbCtYJ:&tbnh=113&tb nw=113 &start=11 &prev=/images%3Fq%3DThomas%2BJefferson,%2B Sally%2 BHemings%26svnum%3D 10%26h1%3Den%261r%3D%26sa%3DG>. Rothman, Joshua D. "James Callender and Social Knowledge of Interracial Sex in Antebellum Virginia." Jan Ellen Lewis, and Peter S. Onuf. Sally Hemings & Thomas Jefferson: History, Memory, and Civic Culture. Charlottesville: University Press of Virginia, 1999. "A Philosophic Cock," a caricature of Thomas Jefferson and Sally Hemings, 1802 (Milgram 1).

Balanced Scorecard Essay

The balance scorecard is used as a strategic planning and a management technique. It is widely used in many organizations, regardless of their scale, to align the organization’s performance to its vision and objectives. The scorecard is also used as a tool which improves the communication and feedback process between the employees and management, and to monitor performance of the organizational objectives. There are four different perspectives of balance scorecard which are financial performance, customer knowledge, internal business processes, and learning and growth. Each perspective represents a different aspect of the business organization in order to operate at optimal capacity. Financial perspective is about how does the firm look to shareholders. This is concerned with the shareholders view of performance. Shareholders are concerned with many aspects of financial performance. Amongst the measures of success are market share, revenue growth, profit ratio, return on investment, economic value added, return on capital employed and profitability. Customer perspective is about how do customers see the firm. This perspective focuses on the analysis of different types of customers, their degree of satisfaction and the processes used to deliver products and services to customers. Particular areas of focus would include customer service, customer retention and customer satisfaction. Internal perspective is about how well it manages its operational processes. This seeks to identify how well the business is performing, whether the products and services offered meet customer expectations, and the critical processes for satisfying both customers and shareholders. Learning and growth perspective is about can the firm continue to improve and create value? This perspective also examines how an organisation learns and grows. This perspective is concerned with issues such as can we continue to improve and create value? In which areas must the organisation improve? How can the company continue to improve and create value in the future? What should it be doing to make this happen? The concerns of balanced scorecard are long term with short term concerns, financial with non-financial concerns, and internal with external concerns.

Answers for Wooldridge

MULTIPLE REGRESSION After completing this chapter, you should be able to: understand model building using multiple regression analysis apply multiple regression analysis to business decision-making situations analyze and interpret the computer output for a multiple regression model test the significance of the independent variables in a multiple regression model use variable transformations to model nonlinear relationships recognize potential problems in multiple regression analysis and take the steps to correct the problems. ncorporate qualitative variables into the regression model by using dummy variables. Multiple Regression Assumptions The errors are normally distributed The mean of the errors is zero Errors have a constant variance The model errors are independent Model Specification Decide what you want to do and select the dependent variable Determine the potential independent variables for your model Gather sample data (observations) for all variables The Correlation Matrix Correlation between the dependent variable and selected independent variables can be found using Excel:Tools / Data Analysis†¦ / Correlation Can check for statistical significance of correlation with a t test Example A distributor of frozen desert pies wants to evaluate factors thought to influence demand Dependent variable: Pie sales (units per week) Independent variables: Price (in $) Advertising ($100’s) Data is collected for 15 weeks Pie Sales Model Sales = b0 + b1 (Price) + b2 (Advertising) Interpretation of Estimated Coefficients Slope (bi) Estimates that the average value of y changes by bi units for each 1 unit increase in Xi holding all other variables constantExample: if b1 = -20, then sales (y) is expected to decrease by an estimated 20 pies per week for each $1 increase in selling price (x1), net of the effects of changes due to advertising (x2) y-intercept (b0) The estimated average value of y when all xi = 0 (assuming all xi = 0 is within the range of obser ved values) Pie Sales Correlation Matrix Price vs. Sales : r = -0. 44327 There is a negative association between price and sales Advertising vs. Sales : r = 0. 55632 There is a positive association between advertising and sales Scatter DiagramsComputer software is generally used to generate the coefficients and measures of goodness of fit for multiple regression Excel: Tools / Data Analysis†¦ / Regression Multiple Regression Output The Multiple Regression Equation Using The Model to Make Predictions Input values Multiple Coefficient of Determination Reports the proportion of total variation in y explained by all x variables taken together Multiple Coefficient of Determination Adjusted R2 R2 never decreases when a new x variable is added to the model This can be a disadvantage when comparing modelsWhat is the net effect of adding a new variable? We lose a degree of freedom when a new x variable is added Did the new x variable add enough explanatory power to offset the loss of on e degree of freedom? Shows the proportion of variation in y explained by all x variables adjusted for the number of x variables used (where n = sample size, k = number of independent variables) Penalize excessive use of unimportant independent variables Smaller than R2 Useful in comparing among models Multiple Coefficient of Determination Is the Model Significant? F-Test for Overall Significance of the ModelShows if there is a linear relationship between all of the x variables considered together and y Use F test statistic Hypotheses: H0: ? 1 = ? 2 = †¦ = ? k = 0 (no linear relationship) HA: at least one ? i ? 0 (at least one independent variable affects y) F-Test for Overall Significance Test statistic: where F has (numerator) D1 = k and (denominator) D2 = (n – k – 1) degrees of freedom H0: ? 1 = ? 2 = 0 HA: ? 1 and ? 2 not both zero ( = . 05 df1= 2 df2 = 12 Are Individual Variables Significant? Use t-tests of individual variable slopes Shows if there is a linear relationship between the variable xi and yHypotheses: H0: ? i = 0 (no linear relationship) HA: ? i ? 0 (linear relationship does exist between xi and y) H0: ? i = 0 (no linear relationship) HA: ? i ? 0 (linear relationship does exist between xi and y) t Test Statistic: (df = n – k – 1) Inferences about the Slope: t Test Example H0: ? i = 0 HA: ? i ? 0 Confidence Interval Estimate for the Slope Standard Deviation of the Regression Model The estimate of the standard deviation of the regression model is: Standard Deviation of the Regression Model The standard deviation of the regression model is 47. 46 A rough prediction range for pie sales in a given week isPie sales in the sample were in the 300 to 500 per week range, so this range is probably too large to be acceptable. The analyst may want to look for additional variables that can explain more of the variation in weekly sales OUTLIERS If an observation exceeds UP=Q3+1. 5*IQR or if an observation is smaller than LO=Q1 -1. 5*IQR where Q1 and Q3 are quartiles and IQR=Q3-Q1 What to do if there are outliers? Sometimes it is appropriate to delete the entire observation containing the oulier. This will generally increase the R2 and F test statistic values Multicollinearity Multicollinearity: High correlation exists between two independent variablesThis means the two variables contribute redundant information to the multiple regression model Including two highly correlated independent variables can adversely affect the regression results No new information provided Can lead to unstable coefficients (large standard error and low t-values) Coefficient signs may not match prior expectations Some Indications of Severe Multicollinearity Incorrect signs on the coefficients Large change in the value of a previous coefficient when a new variable is added to the model A previously significant variable becomes insignificant when a new independent variable is addedThe estimate of the standard deviation of the mode l increases when a variable is added to the model Output for the pie sales example: Since there are only two explanatory variables, only one VIF is reported VIF is < 5 There is no evidence of collinearity between Price and Advertising Qualitative (Dummy) Variables Categorical explanatory variable (dummy variable) with two or more levels: yes or no, on or off, male or female coded as 0 or 1 Regression intercepts are different if the variable is significant Assumes equal slopes for other variables The number of dummy variables needed is (number of levels – 1)Dummy-Variable Model Example (with 2 Levels) Interpretation of the Dummy Variable Coefficient Dummy-Variable Models (more than 2 Levels) The number of dummy variables is one less than the number of levels Example: y = house price ; x1 = square feet The style of the house is also thought to matter: Style = ranch, split level, condo Dummy-Variable Models (more than 2 Levels) Interpreting the Dummy Variable Coefficients (with 3 Levels) Nonlinear Relationships The relationship between the dependent variable and an independent variable may not be linear Useful when scatter diagram indicates non-linear relationshipExample: Quadratic model The second independent variable is the square of the first variable Polynomial Regression Model where: ?0 = Population regression constant ?i = Population regression coefficient for variable xj : j = 1, 2, †¦k p = Order of the polynomial (i = Model error Linear vs. Nonlinear Fit Quadratic Regression Model Testing for Significance: Quadratic Model Test for Overall Relationship F test statistic = Testing the Quadratic Effect Compare quadratic model with the linear model Hypotheses (No 2nd order polynomial term) (2nd order polynomial term is needed) Higher Order Models Interaction EffectsHypothesizes interaction between pairs of x variables Response to one x variable varies at different levels of another x variable Contains two-way cross product terms Effect of Interacti on Without interaction term, effect of x1 on y is measured by ? 1 With interaction term, effect of x1 on y is measured by ? 1 + ? 3 x2 Effect changes as x2 increases Interaction Example Hypothesize interaction between pairs of independent variables Hypotheses: H0: ? 3 = 0 (no interaction between x1 and x2) HA: ? 3 ? 0 (x1 interacts with x2) Model Building Goal is to develop a model with the best set of independent variablesEasier to interpret if unimportant variables are removed Lower probability of collinearity Stepwise regression procedure Provide evaluation of alternative models as variables are added Best-subset approach Try all combinations and select the best using the highest adjusted R2 and lowest s? Idea: develop the least squares regression equation in steps, either through forward selection, backward elimination, or through standard stepwise regression The coefficient of partial determination is the measure of the marginal contribution of each independent variable, given that other independent variables are in the modelBest Subsets Regression Idea: estimate all possible regression equations using all possible combinations of independent variables Choose the best fit by looking for the highest adjusted R2 and lowest standard error s? Aptness of the Model Diagnostic checks on the model include verifying the assumptions of multiple regression: Each xi is linearly related to y Errors have constant variance Errors are independent Error are normally distributed Residual Analysis The Normality Assumption Errors are assumed to be normally distributed Standardized residuals can be calculated by computerExamine a histogram or a normal probability plot of the standardized residuals to check for normality Chapter Summary Developed the multiple regression model Tested the significance of the multiple regression model Developed adjusted R2 Tested individual regression coefficients Used dummy variables Examined interaction in a multiple regression model Described nonlinear regression models Described multicollinearity Discussed model building Stepwise regression Best subsets regression Examined residual plots to check model assumptions

A Teachers Basic Guide to Making a Referral

A Teachers Basic Guide to Making a Referral A referral is a process or steps a teacher takes to get extra assistance for a student that they work directly with on a regular basis. In most schools, there are three distinct types of referrals. Those include referrals for disciplinary issues, referrals for special education evaluations, and referrals to receive counseling services.   A referral is completed when a teacher believes that a student needs some intervention to help them overcome obstacles that may be preventing them from being successful. All referral situations are dictated by the behavior and/or actions of the student. Teachers need professional development and training to recognize specific signs that would indicate when a student may have an issue that requires a referral. Prevention training is more appropriate for discipline referrals, but recognition training would be beneficial for referrals associated with special education or counseling.   Each type of referral has distinct steps that a teacher must follow according to school policy. With the exception of a counseling referral, a teacher must establish that they have attempted to improve the issue before making a referral. Teachers should document any steps that they have taken to help a student improve. Documentation helps establish a pattern which ultimately justifies the need for a referral. It may also help those involved with the referral process in establishing a plan to help the student grow. This process can take a lot of time and extra effort on the teachers part. Ultimately, the teacher must prove that they have exhausted all of their individual resources in most cases before making a referral. Referral for Discipline Purposes A discipline referral is a form a teacher or other school personnel writes up when they want the principal or school disciplinarian to deal with a student issue. A referral typically means that the issue is a serious issue, or it is an issue in which the teacher has tried to handle on without any success. Key Questions to Ask Before Making a Disciplinary Referral Is this a serious issue (i.e. fight, drugs, alcohol) or potential threat to other students that requires immediate attention by an administrator?If this is a minor issue, what steps have I taken to handle the issue myself?Have I contacted the students parents and involved them in this process?Have I documented the steps that I have taken in an attempt to correct this issue? Referral for a Special Education Evaluation A special education referral is a request for a student to be evaluated to determine whether the student is eligible to receive special education services that may include areas such as speech language services, learning assistance, and occupational therapy.  The referral is typically a written request by either the students parent or their teacher. If the teacher is completing the referral, he or she will also attach evidence and samples of work to show why they believe the student needs to be evaluated. Key Questions to Ask Before Making a Special Education Referral What are the exact issues that the student has that lead me to believe that special education services are appropriate?What evidence or artifacts can I produce that supports my belief?What documented steps of intervention have I taken to try to help the student improve before making a referral?Have I discussed my concerns with the childs parents also gaining insight into the childs history? Referral for Counseling Services A counseling referral can be made for a student for any number of legitimate concerns. Some common reasons include: A student is going through a traumatic family issue (i.e. divorce, death in the family).A student exhibits signs of depression and/or withdrawal.A students grades suddenly drop or there is a drastic change in behavior.  A student cries often, gets sick daily, or expresses anger/frustration regularly.A student who has difficulty functioning in the classroom (i.e. behavior issues, will not do work, skips school often, extreme aggressiveness).

Seven Monologues for Young Females

Seven Monologues for Young Females Many play directors require actors to audition not merely with any memorized monologue, but with a monologue that is specifically from a published play. Most actors search and search to find a monologue that is age-appropriate for them and is not one that is used so repeatedly that directors have grown tired of hearing it. Below are seven  monologue recommendations for young female actors. Each one is short in length- some as short as 45 seconds; some a bit longer. Because of copyright restrictions and respect for the playwright’s property, I can only give you the beginning and ending lines of the monologues. No serious actors, however, would ever prepare an audition piece from a play that they had not read (and often re-read) in its entirety. So, take a look at these recommendations and if there are any that you think might work for you, get a copy of the play from the library, a bookstore, or online. Read the play, locate the monologue, and make notes about the character’s words and actions before and after the monologue. Your knowledge of the whole world of the play and your character’s place in it will make a definite difference in your monologue preparation and delivery. Story Theatre by Paul Sills In â€Å"The Robber Bridegroom† story The Miller’s Daughter A young girl is betrothed to a stranger that she does not trust. She makes a secret journey to his house in the depths of the forest. Monologue 1Begins with: â€Å"When Sunday came, the maiden was frightened, but she did not know why.†Ends with: â€Å"She ran from room to room until at last she reached the cellar....† On her wedding day, the young girl tells the story of a â€Å"dream† she had. This dream is really a report of the incident she witnessed at the house of her betrothed and it saves her from marriage to this man. Monologue 2Begins with: â€Å"I will tell you a dream I’ve had.†Ends with: â€Å"Here is the finger with the ring.† You can read more about this play here. I and You by Lauren Gunderson Caroline Caroline is a 17-year-old teenager with a liver disease that confines her to her bedroom. She explains a little bit about her disease and her life to her classmate Anthony. Monologue 1: Towards the end of Scene 1  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Begins with: â€Å"They tried a ton of stuff and now we’re at the point where I just need a new thing.Ends with: â€Å"...it’s suddenly full of kittens and winky faces and ‘We miss you, girl!’ and that is NOT my style!† Caroline has just suffered through an episode that leaves her weak and cramped. When Anthony finally persuades her to relax and talk with him again, she explains how she feels about her disease and her life. Monologue 2: Towards the beginning of Scene 3Begins with: â€Å"Yeah it just happens like that sometimes.†Ends with: â€Å"So that’s one of the many super discoveries of the past few months: nothing is good ever. So yeah.† Anthony records Caroline’s presentation of their school project on his phone. She explains her analysis of Walt Whitman’s use of the pronoun â€Å"You† in his poem Song of Myself.† Monologue 3: Towards the end of Scene 3Begins with: â€Å"Hi. This is Caroline.Ends with: â€Å"Because you is very much...we.† You can read more about this play here. The Good Times Are Killing Me by Lynda Barry Edna Edna is an adolescent who begins the play with this explanation of the urban American neighborhood she lives in during the 1960s. Monologue 1: Scene 1Begins with: â€Å"My name is Edna Arkins.†Ends with: â€Å"Then it seemed like just about everybody kept moving out until now our street is Chinese Chinese Negro Negro White Japanese Filipino and about the same but in different orders for down the whole street and across the alley.† Edna describes her fantasy of being the star of â€Å"The Sound of Music.† Monologue 2:  Scene 5Begins with: â€Å"The hills are alive with the sound of music was the first best movie I ever saw and the first best music I ever heard.†Ends with: â€Å"I could always tell the difference between God and a street light.† You can read more about this play here. You can read information about  preparing a monologue here.

Can Go company Case Study Example | Topics and Well Written Essays - 250 words

Can Go company - Case Study Example On the other hand, the firm can outsource the storage function to competent providers. In the second video, online gaming implementation is a complex issue. The success of the firm depends on its responsiveness to market needs and sustainability of trading options. The other issues in the firm include hardware, software, and bandwidth complexities. One way of solving this has to include different stakeholders in the implementation stage. It will erode the possibilities of resistance and hurdles attached to implementation (Crawford, 2003). The second approach is that of involving technical expertise in developing and re-evaluating options in hardware, bandwidth, and software preferences. The third video presents the variance in merging the goals of the firm and the individual preferences and interests of employees. This poses much resistance in organizational direction and overall firm performance. The second issue that is depicted in this case is the hurdle of successful planning. One way of addressing this is through conducting enterprise-wide awareness campaigns for the purposes of stakeholder buy-ins (Crawford, 2003). The other recommendation is carrying out comprehensive data-mining efforts to make evidence based

Google in China Analysis 2 Pham Essay Example | Topics and Well Written Essays - 500 words

Google in China Analysis 2 Pham - Essay Example filtering laws and processes of the Chinese government that is not aligned with the firm’s motto, â€Å"Don’t be evil.† It also experiences challenges in brand positioning in China. Baidu is the most popular search engine in China because it is perceived as a â€Å"Chinese brand with good technology† (Lawrence, 2009, p.266). Baidu also provides added services that Google does not offer, such as messaging, entertainment, news, and email. If Google can change brand associations that will make it more competitive, it can oust Baidu from its market leadership. Google can also have an opportunity to test and boost its expertise in global technology by serving the Chinese market inside China, thereby expanding its technology’s economies of scope and scale. Google can leverage its superior global technology that is built on its efficient search engine, and change its brand personality, so that it can be more Chinese. Right now, Google uses umbrella brands for its brand name Google, but it should consider a House-of-Brands approach. For its Chinese brand, it should expand its Internet services, by offering services such as: online chatting; downloading music, TV shows, and movies; and playing online games, since these are the most popular Internet activities for Chinese users, according to latest surveys. About 46 million users in China are connected to the Web, and a rapidly growing population has DSL/cable access (Lawrence, 2009, p.266). In 2005, as seen in Exhibit B, more than 50% of all Web users had a high-speed Internet connection. Usage rates also indicated that sixty-nine per cent of users use Internet at home, while 38% use the Internet at work (Lawrence, 2009, p.266). Exhibit B also provides evidence that from 2002 to 2005, users with broadband access grew from less than 10 million to 50 million, or around 80% growth in five years. Other estimates showed that there were 134 million Internet users in China in 2005 (Lawrence, 2009, p.257). This means that the