Monday, December 30, 2019

No One Hears Words on a Page The Native American Oral...

The impact of contemporary Native American authors is not diminished by the fact they fail to fully transcribe tales of the oral tradition into an equally successful literary story. The basic elements of the oral tradition are technically adhered to but the interaction between audience and the teller is absent. The lack of personal interaction with the histories and ethical tales changes the culture of Native Americans. Literary stories are generally published for public consumption. The public, not sensitive to Native culture, then controls the success and future publication of the stories. Societal accountability impacts the marketability and perhaps the integrity of the Native story. The conflict of interest between the working author†¦show more content†¦The history or moral objective of the story takes on a personal tone as each listener knows one day he will tell these stories to his children and they, to their children. The sense of participation and responsibility in the proliferation of the stories is not present in a literary transcription. Literary works easily capture the technical element of the oral tradition. Literary works can capture the stories themselves but not nuances that come only from inflection and tone. Where the oral tradition style is present in a story, Gerald Vizenors Heartlines is one example; the literary work fails in its mission to share information. The pauses inherent in speech are indicated by bold paragraph titles, less subtle than a well placed intake of breath. . Nature is endowed with human emotions likein Vizenors Heartlines, `the ice waited in silence, hardhearted on the blue summer mire, and even the cedar waxings were uncertain over the late turn of t he seasons.(152). Shifts in time do not translate well into a written tale. It is confusing and hard to follow. One is never quite sure what is happening or when it is happening. Even with the presence of several elements of the oral tradition the story does not flow. The story read aloud is beautiful and clear. In fact, the literary transcription of the tales are especially important for future generations of Natives who may not ever hear the stories told butShow MoreRelatedDiscursive Violence in Silko’s Yashtoah1091 Words   |  4 PagesWith the help of, or the lack thereof, written history has drastically changed oral tradition. In Leslie Marmon Silko’s Storyteller, she tells her story and the story of her people. Oral tradition is essential to the Native American culture. These stories are handed down from generation to the next. The stories are sacred and those who know the stories are expected to protect the sanctity and validity of these stories. Silko invites the readers into the Laguna culture with the stories, includingRead MoreThe Historical Perspectives and Trends of Childrens Literature1594 Words   |  7 Pageschildren’s literature told from newer books and now even computers, it is easy to tell that the historical perspectives and trends of childrenâ⠂¬â„¢s literature continue to change throughout time. Today, the most common way of storytelling is by reading the words out of a book. Many, many years ago, this was not the case due to the lack of publishing. Individuals took it upon themselves to tell stories orally instead. These stories were often called â€Å"folklore†, â€Å"folk literature†, or â€Å"mythology†. Many of theseRead MoreEssay on America Benefits Greatly from Bilingual Education2142 Words   |  9 Pageslanguage. You will just gain another on top of your first one. Your bilingual skills will make it possible to keep your links with your parents at home and a the same time function in the outside world. Language does indeed carry within it the history, culture, traditions, the life of a people. If we wish to destroy a culture, we sever its linguistic roots. If we wish to subjugate a rising generation, we separate them from their native language. This pertains to bilingual education in thatRead MoreTeaching Middle and High School Students Literature7100 Words   |  29 Pages c) Short Story Selections 1. Suggested Activities to use with Various Groups II. Oral Tradition Literature – Tall Tales and Folktales a) Analyze characteristics and plots of Folktales and Tall Tales b) Understanding Hyperbole c) Writing a Tall Tale d) Selections of Oral Tradition Literature III. Novel Studies a) Previewing the novel b) Defining and UnderstandingRead MoreA Jerney in to the Deaf World15812 Words   |  64 PagesChapter notes: Chapter Notes from Journey Into Deaf-World Chapter 1 Chapter one is basically an introduction to the issues that are discussed throughout the book. Chapter one introduces all the people that are constantly referred to throughout the book. Ben Bahan is the narrator and introduces us to Jake Cohan, Laurel Case, Roberto Rivera and Henry Byrne. Ben is a CODA, Child Of Deaf Adults, and like many CODA’s tried to stray from the deaf community be was eventually drawn back to it. He isRead MoreSupporting the Development of English Literacy in English Language Learners22851 Words   |  92 Pagesschool reform, as well as a program of institutional activities. CRESPAR is organized as a partnership of Johns Hopkins University and Howard University, and supported by the National Institute on the Education of At-Risk Students (AtRisk Institute), one of five institutes created by the Educational Research, Development, Dissemination and Improvement Act of 1994 and located within the Office of Educational Research and Improvement (OERI) at the U.S. Department of Education. The At-Risk Institute supportsRead MoreThesis About English Proficiency Among Bshrm Students10781 Words   |  44 Pagessupport and counsel they could not have completed the study. They wanted also to dedicate their work to all their Parents and Love ones who served as their inspiration all throughout their writings, their support and trust and patience that lead to the reality of this work. TABLE OF CONTENTS Title Page†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.i Approval Page†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.ii Acknowledgement†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..iii Dedication†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦...iv Table of Contents†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Read MorePre-Spanish Period8197 Words   |  33 PagesHistorical Background Long before the Spaniards and other foreigners landed or set foot on Philippine shores, our forefathers already had their own literature stamped in the history of our race. Our ancient literature shows our customs and traditions in everyday life as traced in our folk stories, old plays and short stories. Our ancestors also had their own alphabet which was different from that brought by the Spaniards. The first alphabet used by our ancestor was similar to that of theRead More Myth of Propaganda in the Balkans and Rwanda Essay6707 Words   |  27 Pagessome things worth fighting for, and given the appropriate context, there are some things worth killing for. As reasoning beings, we hope that if violence is the only option it is for a clear and legitimate purpose. That is why it was so confounding to hear of such heinous acts of senseless violence as stories from Germany began to emerge after World War II. The world shuddered as the actions of Hitler’s henchmen attempting to eradicate entire ethnic groups were revealed. It was inconceivable: what couldRead MoreRole Of Data Driven Learning And Traditional Instruction Essay9233 Words   |  37 Pages.......................................................................................................... 185 iii LIST OF TABLES Table 1.1. Comparison of student-initiated and teacher-initiated learning of a word ........................ 13 Table 1.2. Differences between glossing and word meaning inferencing .......................................... 17 Table 2.1 Oxford’s Strategy Classification System............................................................................ 51 Table 2.2 Features

Sunday, December 22, 2019

Essay about Stat Project - 1698 Words

Stat 113 Beiyi(Summer) Liu Professor Ihsan Shahwan Final Project Part C In order to figure out how variables relates to each other and the connections among the variables, or one can predict the other. I will choose three quantitative variables or two quantitative variables and one categorical variable on each pairs. I will also use graphs of scatter plots; regression and correlation to understand that how one variable affect other two variables. There are six groups below: Group one: High School Percentile (HSP), Cumulative GPA (GPA), and ACT Composition Score (COMP) a) HSP vs GPA b) HSP vs COMP c) COMP vs GPA From graph a, we can find out that there is moderate†¦show more content†¦From graph b, there is weak positive liner relationship between CREDITS and GPA; the correlation is 0.106; the equation of regression is GPA=0.00141886*CREDITS+2.94831; the slope is 0.00141886 which is positive; when the predictor variable CREDITS increase, the response variable GPA also weakly increase; for example, when CREDITS increase by 1, the GPA will increase 0.00141886. From graph c, there is a strong positive liner association between AGE and CREDITS; the correlation is 0.668; the equation of regression is CREDITS=11.7475*AGE-174.356; the slope is 11.7475 which is positive; when the predictor variable AGE increase, the response variable CREDITS also strongly increase; for instance, when AGE increase by 1, the CREDITS will increase 11.7475. There are some outliers may affect the correlation. Based on the graphs and data above, we can find out a student who is older with a litter lower GPA, but has very higher credits; the student with higher credits also has high GPA. Group Four: ACT English Score (ENGLISH), ACT Composition Score (COMP) and Age (AGE) a) AGE vs ENGLISH b) AGE vs COMP c) ENGLISH vs COMP From graph a, we can see that there is a weak negative liner relationship between AGE and English scores; the correlation is -0.042; the equation of regression is ENGLISH=-0.0814809*AGE+24.469; the slope is -0.0814809 which is negative; when the predictorShow MoreRelatedStat Project1145 Words   |  5 Pages| | | | Regression | 3 | 609.527 | 203.1757 | 130.0599 | 7.56E-06 | | | | Residual | 6 | 9.373017 | 1.562169 | | | | | | Total | 9 | 618.9 |    |    |    | | | | | | | | | | | | |    | Coefficients | Standard Error | t Stat | P-value | Lower 95% | Upper 95% | Lower 95.0% | Upper 95.0% | Intercept | -10.1702 | 3.473129 | -2.92827 | 0.026346 | -18.6687 | -1.6718 | -18.6687 | -1.6718 | Food Sales (tens of thousands of dollars) | 0.027038 | 0.012041 | 2.245505 | 0.065847Read MoreMy Natural Characteristics Of The Management Consulting Module1935 Words   |  8 PagesHighlighting my natural characteristics of being a logical thinker and operational planner, the assigned summer project would strengthen and amplify my knowledge and understanding of wider issues surrounding the business and industry, moreover it would make me responsive to the ramification of future trends in the market environment. For this reason I was looking forward to working as a team on project Formica, which is world’s ubiquitous and leading brand in high pressure laminates (HPL) and surfacing solutionsRead MoreThe Impact Of Kickstarter On The Arts And Creation1274 Words   |  6 Pagesover 1.5 billion dollars, successfully funding over 90,000 projects (Stats, 2015). In exchange for a 5% fee on overall funds collected, Kickstarter effectively acts as an intermediary between creates a br idge between producers and their backers. Kickstarter functions as a reward or pre-purchased based crowdfunding site, and is considered one of the leaders of this type (Bradsford, 2012, pp. 16). Bakers are tempted into supporting a project by promises of everything from exclusive access, to specialRead MoreThe Career Of An Operations Manager At A Call Center963 Words   |  4 Pagesto help decrease the time it takes to accomplish a schedule (project management knowledge, 2010). Every project manager is faced with the problem of how to estimate what it will take to accomplish the project s objectives. Estimating the time, cost, and resource is never simple, and the higher the stakes become, the more anxiety the estimate is. In order for the project planning, scheduling and controlling are to be effective; project manager must employ the methodology to accurately estimate timeRead MoreNew Electronic Health Record ( Ehr ) That Can Better Support Future Patient And Healthcare Needs1284 Words   |  6 Pagesan upstart that is changing the status quo by allowing patients to access care at the time and place they choose (Kulin, 2015). In the book,Where Does It Hurt? An Entrepreneur’s Guid to Fixing Health Care (Bush Baker, 2014), reported a few stark stats that leadership presented to investors as to why our organization needed to make the switch to a new Electronic Health Record (EHR) that could better support future patient and healthcare needs. Accord ing to Bush and Baker (2014), the United States’Read MoreList Of Potential Sources And Guide Essay1684 Words   |  7 PagesPart 1 Document Reference: List of Potential Sources and Guide Document Version: 1.0 Date of Issue: 11-Sep-16 Table of Contents 1 PURPOSE 3 2 OVERVIEW 3 3 PRE-REQUISITES 3 4 DEFINITIONS 3 5 ROLES AND RESPONSIBILITIES 3 5.1 PROJECT TEAM 3 6 PART 1 – PROJECT PROPOSAL 4 6.1 OVERALL DESCRIPTION 4 6.2 SCOPE AND LIMITATIONS OF THE SYSTEM 4 6.3 BENEFITS/ADVANTAGES OF THE SYSTEM†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.....5 6.4 SYSTEM COMPONENTS AND MODULES†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.5 6.5 Read MoreInterview About A Local Web Agency1900 Words   |  8 PagesAs for now they rather not do that for now. Google hangouts is also used to communicate. 6B digital developed from scratch a database called CRM Database. They use this to communicate but also communicate relevant information such as on going projects, stats and sales. This web based application can be accessed anywhere and everywhere. CRM Database is also set up and running in 25 different companies not just their own. Local/National/ State of: A lot of their work is local from Wakefield to SheffieldRead MoreInterview About A Local Web Agency1900 Words   |  8 PagesAs for now they rather not do that for now. Google hangouts is also used to communicate. 6B digital developed from scratch a database called CRM Database. They use this to communicate but also communicate relevant information such as on going projects, stats and sales. This web based application can be accessed anywhere and everywhere. CRM Database is also set up and running in 25 different companies not just their own. Local/National/ State of: A lot of their work is local from Wakefield to SheffieldRead MoreDesigning A Model Of Industry Acceptable Design And Implementation3014 Words   |  13 Pages Supervisor: Mark Stansfield Moderator: Dr Abel Usoro CONTENTS Chapter 1 Introduction 3 Chapter 2 Background Research 4 Chapter 3 User Study of Existing Solutions 5 CHAPTER 1 INTRODUCTION 1.1 PROJECT AIM The aim of this project is to develop a model website that can highlight certain design and developmental issues present on many given websites. The aim is to present these issues in a meaningful way to the owner of the website, allowing them to quickly andRead MoreProject Management Plan For The City Of Casa Grande, Hoa Communities2559 Words   |  11 Pages Schedule June 29, 2015 : Project planning is initiated July 6 , 2015: Initiation of Project July 7 , 2015: Project kick off meeting July 8 , 2015: Job posting is put up for three new landscapers July 20, 2015: Begin bidding on projects for the City of Casa Grande, HOA communities and other large businesses. July 27 , 2015: Select candidates to be interviewed and schedule interviews. July 29 , 2015: Begin interviews August 3 , 2015: Finish up the interviews August 7 , 2015: Offer positions August

Saturday, December 14, 2019

Felons and the Right to Vote Free Essays

Sara Duran-Campos Professor Gould English 111 December 12, 2012 Convicted Felons Should Not Be Allowed to Vote Many Americans were not allowed to vote these past elections. It wasn’t because they didn’t pay taxes or were mentally incompetent or underage. The reason why they can’t vote is because they are convicted felons. We will write a custom essay sample on Felons and the Right to Vote or any similar topic only for you Order Now Certain states do not give back the right to vote after Ex-convicted felons have paid their debts or completed their time in jail. Some states have a probation period before the ex-felon is allowed to vote. There are some states that go to the extent to never return the right to vote to felons or ex-felons. The right to vote to felons should be taken away as a form of punishment. After completing their time in jail felons, which now are ex-felons, should have their right to vote restored. A felony is a serious crime usually punishable by imprisonment or death. Felons are people that have been convicted of a crime such as murder, rape, arson, child molest, drug offender and burglary. Virginia is one of many states that takes the right to vote away from felons as a form of punishment. Maine allows felons to vote even when they are imprisoned. The act of taking away the right to vote from felons and ex-felons is called Disenfranchisement. People that are in favor of disenfranchisement believe that those convicted of a crime have shown poor judgment therefore, proves them unfit to make good decisions when it comes to elections. Some believe that felon disenfranchisement laws also have a big racial impact because certain percent of population have their right to vote taken away more than others. Rates of incarceration and sentencing for African-Americans are higher than Caucasians, Latinos, and Native Americans. It seems like a good point but voting requires certain minimum standards of and trustworthiness. Those who have committed serious crimes against their fellow citizens do not meet the standards of voting. Discrimination when sentencing a felon should not be practice in any court. If there is any proof of discrimination the government should that addressed too. Any citizen that does not want their right to vote taken away should not commit a crime. Voting is and should be a privilege for everyone without discrimination. Voting should not be allowed in prison. Felons are in prison because have not paid their debt yet. They are in the process of doing that. Felons have lost their right of freedom and other civil rights after committing a crime. The right of voting should also be taken away as a form or punishment. The right to vote should be withheld and return after release from prison. Those that support felons right to vote believe that a felon’s debt to society is their time behind bars. They don’t believe that felons should lose their right to vote. Section 5: Felons should pay Their debt * (Use your evidence to support it) * Comment on how you feel (Don’t use I feel, just say it) about this information in relation to the overall message. * Another point to support what was said in the beginning of the paragraph * Evidence * Comment on this as well * Transition * Section 6: Felons Should Have a Restoration of Vote * The Argument of felons and their right to vote is very important in the United States because many Americans were not allowed to vote this past elections due to being an ex-felon. Comment on how you feel (Don’t use I feel, just say it) about this information in relation to the overall message. * a study suggesting that former offenders who vote are less likely to return to jail. Evidence * Thirty-five states prohibit at least some people from voting after they have been released from prisonTransition * Section 7: Conclusion * Restate thesis * Reiterate your major points * Therefore, it is evident * Stro ng ending. Works Cited Browne, Sharon, and Roger Clegg. â€Å"Felons Have Lost Their Right to Vote. † Los Angeles Times. Los Angeles Times, 13 June 2010. Web. 01 Dec. 2012. How to cite Felons and the Right to Vote, Papers

Thursday, December 5, 2019

Creatine Monohydrate Essay Research Paper Creatine MonohydrateCreatine free essay sample

Creatine Monohydrate Essay, Research Paper Creatine Monohydrate Creatine is a natural substance found in highest concentration in thin ruddy musculus tissue of animate beings and worlds in the signifier of creatine phosphate. When musculuss are used to raise a weight, or execute any type of work, ATP, ( Adenosine Triphosphate ) is quickly broken down to ADP ( Adenosine Diphosphate ) and energy is released. The sum of ATP stored in the musculus will merely fuel a maximal attempt such as weight raising for 10 to 15 seconds. After that the musculus must trust on Creatine to restock its supply of ATP. ATP has three phosphate molecules to one molecule of adenosine. Energy is created when one of the phosphate molecules breaks off turning ATP into adenosine diphosphate ( ADP ) , which is adenosine with merely two phosphate molecules. The breakage of the bonds between these molecules produces all the energy the organic structure requires to work. Creatine phosphate ( CP ) serves as an immediate backup to reconstruct the losing phosphate bond. We will write a custom essay sample on Creatine Monohydrate Essay Research Paper Creatine MonohydrateCreatine or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Dietary creatine is available in meats and fish, but the sum is depleted quickly when nutrients are cooked. There is about 2 gms of creatine per lb of natural, ruddy meat. Most people, through diet and synthesis, merely shop about 60-80 % of their possible creatine degrees. This is why some say that supplementing with creatine enables an person to promote their creatine storage to a maximal value. This extra creatine is believed to give the organic structure the necessary ingredients to reproduce more ATP during the creatine kinase procedure and to finally bring forth more work. Maximizing the degree of stored Creatine through auxiliary consumption of Creatine Monohydrate, is believed to widen peak athletic public presentation for longer periods during short continuance, high strength exercising. Creatine Monohydrate may besides assist the weightlifter by increasing the volumization of the musculuss, buffering lactic acid build-up, and heightening protein synthesis. The general consensus among muscle builders is that Creatine does work. While utilizing Creatine most jocks say they notice the increased endurance that it provides. Many note that they have every bit much energy and strength as they had at the beginning of the exercise. Because Creatine is a reasonably new addendum, there has been small survey on the effects from long-run use. Protein Found in fish, meats, domestic fowl eggs and dairy merchandises, proteins contain aminic acids, which assistance in the edifice of musculus. Like saccharides, proteins besides give the organic structure fuel and energy it needs in order to finish a physically demanding exercise. Because protein dramas such a cardinal function in the edifice of musculus, it besides becomes a beginning of contention in the athleticss nutrition community. How much protein do muscle builders necessitate? First figure out how many Calories you need. If you # 8217 ; re non taking in adequate Calories, you can # 8217 ; t construct musculus tissue expeditiously. That # 8217 ; s because your organic structure will be firing most of your Calories, non utilizing them to mend musculus tissue. For illustration, take a 180 lb cat # 8212 ; if he # 8217 ; s reasonably active, he likely needs about 2700 Calories a twenty-four hours ( plus or minus a few ) to keep his weight. Besides his moderate day-to-day activity degree, he could fire about 500 Calories during an hr of heavy weightlifting. If he wants to add one lb of musculus weight per hebdomad, he needs about 500 excess Calories per twenty-four hours plus about 500 more to do up for the energy shortage from intense weight-lifting. This makes his expansive sum to be around 3700 Calories a twenty-four hours. So how can we interpret this figure to his protein demands? The RDA for protein has been established at 0.8 grams/kg of organic structure weight for grownups. This is non plenty to construct musculus mass for intense jocks. Although it # 8217 ; s hard to nail a specific figure because you have to take into history many variables, research has determined an acceptable scope: even at the really high terminal, the top protein consumption demands to be 1.5 # 8211 ; 2.0 g/kg of organic structure weight. For our 180 pound. ( divided by 2.2 = 82 kilogram ) lifter, this would be 122 # 8211 ; 164 gms of protein per twenty-four hours. Since protein has 4 Calories per gm, so this sum of protein would consist 13 # 8211 ; 18 per centum of his day-to-day thermal consumption of 3700 Calories ; the usual recommendation is about 12 # 8211 ; 15 per centum. As you can see, a immense surplus of protein is non needed. It # 8217 ; s easy to acquire adequate protein from nutrient # 8212 ; and rather easy for many people to exaggerate it. If excessively much high-fat protein is taken in, and non used, additions may be seen in fat tissue instead than in musculus tissue. Androstendione Androstenedione is a direct precursor endocrine to testosterone, every bit good as to other endocrines, including one type of estrogen. It is converted from cholesterin, as are all other steroid endocrines. Biochemically, a reaction, or concatenation of reactions, occurs in order to change over molecule A into molecule B. Specific enzymes and endocrines, among other things, must be present and ready to work, so to talk, for these transitions to take topographic point. For illustration, luteinizing endocrine, produced and released by the pituitary secretory organ, plays a polar function in change overing androstenedione to testosterone. Simply presenting excess androstenedione to your system does non automatically intend that all of the necessary participants will be at that place to bring forth testosterone. Most clinical surveies have shown that additions in musculus mass with Androstenedione are few with possible side effects such as increased hazard of bosom disease, increased haz ard of pancreatic malignant neoplastic disease, and increase in unwanted chest expansion. DHEA DHEA is of course produced by the adrenal secretory organs which sit on top of each kidney. We make less of it as we get older and likely 80 % less by the clip we # 8217 ; re 70 old ages of age. As a dietetic addendum it might hold a positive consequence on consciousness and overall sense of good being in people over 50. Surveies have shown this. In people under 50 it has non been shown to hold much consequence at all. A dosage for people over 50 would be 50mg per twenty-four hours. DHEA is two stairss removed from being testosterone and can either change over to androstenedione ( 4-dione ) or 5-androstenediol ( 5-diol ) . 4-dione may change over to either testosterone or theelin ( an estrogen ) and 5-diol may change over to testosterone or back to DHEA. DHEA is non a good testosterone precursor and at best will travel through no less than two transitions to go testosterone. Extra information on addendums can be found on the addendum s page. Bibliography Creatine Monohydrate Creatine is a natural substance found in highest concentration in thin ruddy musculus tissue of animate beings and worlds in the signifier of creatine phosphate. When musculuss are used to raise a weight, or execute any type of work, ATP, ( Adenosine Triphosphate ) is quickly broken down to ADP ( Adenosine Diphosphate ) and energy is released. The sum of ATP stored in the musculus will merely fuel a maximal attempt such as weight raising for 10 to 15 seconds. After that the musculus must trust on Creatine to restock its supply of ATP. ATP has three phosphate molecules to one molecule of adenosine. Energy is created when one of the phosphate molecules breaks off turning ATP into adenosine diphosphate ( ADP ) , which is adenosine with merely two phosphate molecules. The breakage of the bonds between these molecules produces all the energy the organic structure requires to work. Creatine phosphate ( CP ) serves as an immediate backup to reconstruct the losing phosphate bond. Dietary creatine is available in meats and fish, but the sum is depleted quickly when nutrients are cooked. There is about 2 gms of creatine per lb of natural, ruddy meat. Most people, through diet and synthesis, merely shop about 60-80 % of their possible creatine degrees. This is why some say that supplementing with creatine enables an person to promote their creatine storage to a maximal value. This extra creatine is believed to give the organic structure the necessary ingredients to reproduce more ATP during the creatine kinase procedure and to finally bring forth more work. Maximizing the degree of stored Creatine through auxiliary consumption of Creatine Monohydrate, is believed to widen peak athletic public presentation for longer periods during short continuance, high strength exercising. Creatine Monohydrate may besides assist the weightlifter by increasing the volumization of the musculuss, buffering lactic acid build-up, and heightening protein synthesis. The general consensus among muscle builders is that Creatine does work. While utilizing Creatine most jocks say they notice the increased endurance that it provides. Many note that they have every bit much energy and strength as they had at the beginning of the exercise. Because Creatine is a reasonably new addendum, there has been small survey on the effects from long-run use. Protein Found in fish, meats, domestic fowl eggs and dairy merchandises, proteins contain aminic acids, which assistance in the edifice of musculus. Like saccharides, proteins besides give the organic structure fuel and energy it needs in order to finish a physically demanding exercise. Because protein dramas such a cardinal function in the edifice of musculus, it besides becomes a beginning of contention in the athleticss nutrition community. How much protein do muscle builders necessitate? First figure out how many Calories you need. If you # 8217 ; re non taking in adequate Calories, you can # 8217 ; t construct musculus tissue expeditiously. That # 8217 ; s because your organic structure will be firing most of your Calories, non utilizing them to mend musculus tissue. For illustration, take a 180 lb cat # 8212 ; if he # 8217 ; s reasonably active, he likely needs about 2700 Calories a twenty-four hours ( plus or minus a few ) to keep his weight. Besides his moderate day-to-day activity degree, he could fire about 500 Calories during an hr of heavy weightlifting. If he wants to add one lb of musculus weight per hebdomad, he needs about 500 excess Calories per twenty-four hours plus about 500 more to do up for the energy shortage from intense weight-lifting. This makes his expansive sum to be around 3700 Calories a twenty-four hours. So how can we interpret this figure to his protein demands? The RDA for protein has been established at 0.8 grams/kg of organic structure weight for grownups. This is non plenty to construct musculus mass for intense jocks. Although it # 8217 ; s hard to nail a specific figure because you have to take into history many variables, research has determined an acceptable scope: even at the really high terminal, the top protein consumption demands to be 1.5 # 8211 ; 2.0 g/kg of organic structure weight. For our 180 pound. ( divided by 2.2 = 82 kilogram ) lifter, this would be 122 # 8211 ; 164 gms of protein per twenty-four hours. Since protein has 4 Calories per gm, so this sum of protein would consist 13 # 8211 ; 18 per centum of his day-to-day thermal consumption of 3700 Calories ; the usual recommendation is about 12 # 8211 ; 15 per centum. As you can see, a immense surplus of protein is non needed. It # 8217 ; s easy to acquire adequate protein from nutrient # 8212 ; and rather easy for many people to exaggerate it. If excessively much high-fat protein is taken in, and non used, additions may be seen in fat tissue instead than in musculus tissue. Androstendione Androstenedione is a direct precursor endocrine to testosterone, every bit good as to other endocrines, including one type of estrogen. It is converted from cholesterin, as are all other steroid endocrines. Biochemically, a reaction, or concatenation of reactions, occurs in order to change over molecule A into molecule B. Specific enzymes and endocrines, among other things, must be present and ready to work, so to talk, for these transitions to take topographic point. For illustration, luteinizing endocrine, produced and released by the pituitary secretory organ, plays a polar function in change overing androstenedione to testosterone. Simply presenting excess androstenedione to your system does non automatically intend that all of the necessary participants will be at that place to bring forth testosterone. Most clinical surveies have shown that additions in musculus mass with Androstenedione are few with possible side effects such as increased hazard of bosom disease, increased haz ard of pancreatic malignant neoplastic disease, and increase in unwanted chest expansion. DHEA DHEA is of course produced by the adrenal secretory organs which sit on top of each kidney. We make less of it as we get older and likely 80 % less by the clip we # 8217 ; re 70 old ages of age. As a dietetic addendum it might hold a positive consequence on consciousness and overall sense of good being in people over 50. Surveies have shown this. In people under 50 it has non been shown to hold much consequence at all. A dosage for people over 50 would be 50mg per twenty-four hours. DHEA is two stairss removed from being testosterone and can either change over to androstenedione ( 4-dione ) or 5-androstenediol ( 5-diol ) . 4-dione may change over to either testosterone or theelin ( an estrogen ) and 5-diol may change over to testosterone or back to DHEA. DHEA is non a good testosterone precursor and at best will travel through no less than two transitions to go testosterone. Extra information on addendums can be found on the addendums page.

Monday, November 25, 2019

Battle of Gazala in World War II

Battle of Gazala in World War II The Battle of Gazala was fought May 26 to June 21, 1942, during the Western Desert Campaign of World War II (1939-1945). Despite having been thrown back in late 1941, General Erwin Rommel began pushing east across Libya early the following year. Responding, Allied forces constructed a fortified line at Gazala which extended south from the Mediterranean coast. On May 26, Rommel opened operations against this position by attempting to flank it from the south with the goal of trapping Allied forces near the coast. In nearly a month of fighting, Rommel was able to shatter the Gazala line and send the Allies retreating back into Egypt. Background In the wake of Operation Crusader in late 1941, General Erwin Rommels German and Italian forces were compelled to retreat west to at El Agheila. Assuming a new position behind a strong line of fortifications, Rommels Panzer Army Afrika was not attacked by British forces under General Sir Claude Auchinleck and Major General Neil Ritchie. This was largely due to the British need to consolidate their gains and build a logistical network after an advance of over 500 miles. Largely pleased with the offensive, the two British commanders had succeeded in relieving the siege of Tobruk (Map). Major General Neil Ritchie (center) addressing other officers in North Africa, May 31, 1942. Public Domain As a result of the need to improve their supply lines, the British reduced their frontline troop strength in the area of El Agheila. Probing the Allied lines in January 1942, Rommel found little opposition and began a limited offensive east. Retaking Benghazi (January 28) and Timimi (February 3), he pushed on towards Tobruk. Rushing to consolidate their forces, the British formed a new line west of Tobruk and extending south from Gazala. Beginning at the coast, the Gazala line extended 50 miles south where it was anchored on the town of Bir Hakeim. To cover this line, Auchinleck and Ritchie deployed their troops in brigade-strength boxes which were linked by barbed wire and minefields. The bulk of the Allied troops were placed near the coast with progressively fewer as the line extended into the desert. The defense of Bir Hakeim was assigned to a brigade of the 1st Free French Division. As the spring progressed, both sides took time to resupply and refit. On the Allied side, this saw the arrival of new General Grant tanks which could match the German Panzer IV as well as improvements in coordination between the Desert Air Force and troops on the ground. Rommels Plan Assessing the situation, Rommel devised a plan for a sweeping flank attack around Bir Hakeim designed to destroy the British armor and cut off those divisions along the Gazala Line. To execute this offensive, he intended the Italian 132nd Armored Division Ariete to assault Bir Hakeim while the 21st and 15th Panzer Divisions swung around the Allied flank to attack their rear. This maneuver would be supported by the 90th Light Afrika Division Battle Group which was to move around the Allied flank to El Adem to block reinforcements from joining the battle. Fast Facts: Battle of Gazala Conflict: World War II (1939-1945)Dates: May 26-June 21, 1942Armies Commanders:AlliesGeneral Sir Claude AuchinleckMajor General Neil Ritchie175,000 men, 843 tanksAxisGeneral Erwin Rommel80,000 men, 560 tanksCasualties:Allies: approx. 98,000 men killed, wounded, and captured as well as around 540 tanksAxis: approx. 32,000 casualties and 114 tanks Fighting Begins To complete the attack, elements of the Italian XX Motorized Corps and 101st Motorized Division Trieste were to clear a path through the minefields north of Bir Hakeim and near the Sidi Muftah box to supply the armored advance. To hold Allied troops in place, the Italian X and XXI Corps would assault the Gazala Line near the coast. At 2:00 PM on May 26, these formations moved forward. That night, Rommel personally led his mobile forces as they began the flanking maneuver. Almost immediately the plan began to unravel as the French mounted a vigorous defense of Bir Hakeim, repelling the Italians (Map). A short distance to the southeast, Rommels forces were held up for several hours by the 7th Armoured Divisions 3rd Indian Motor Brigade. Though they were forced to withdraw, they inflicted heavy losses on the attackers. By midday on the 27th, the momentum of Rommels attack was faltering as British armor entered the battle and Bir Hakeim held out. Only the 90th Light had clear success, over-running the 7th Armoured Divisions advance headquarters and reaching the El Adem area. As fighting raged over the next several days, Rommels forces became trapped in an area known as The Cauldron (Map). Turning the Tide This area saw his men trapped by Bir Hakeim to the south, Tobruk to the north, and the minefields of the original Allied line to the west. Under constant assault by Allied armor from the north and east, Rommels supply situation was reaching critical levels and he began to contemplate surrender. These thoughts were erased when early on May 29 supply trucks, supported by the Italian Trieste and Ariete Divisions, breached the minefields north Bir Hakeim. Able to re-supply, Rommel attacked west on May 30 to link up with the Italian X Corps. Destroying the Sidi Muftah box, he was able to split the Allied front in two. On June 1, Rommel dispatched the 90th Light and Trieste divisions to reduce Bir Hakeim, but their efforts were repulsed. At the British headquarters, Auchinleck, fueled by overly-optimistic intelligence assessments, pushed Ritchie to counterattack along the coast to reach Timimi. Rather than oblige his superior, Ritchie instead focused on covering Tobruk and reinforcing the box around El Adem. On June 5 a counterattack did move forward, but Eighth Army made no progress. That afternoon, Rommel decided to attack east towards Bir el Hatmat and north against the Knightsbridge Box. Italian Ariete Division tanks at the Battle of Gazala, June 10, 1942. Public Domain The former succeeded in overrunning the tactical headquarters of two British divisions leading to a breakdown of command and control in the area. As a result, several units were severely beaten through the afternoon and on June 6. Continuing to build strength in the Cauldron, Rommel conducted several attacks on Bir Hakeim between June 6 and 8, significantly reducing the French perimeter. By June 10 their defenses had been shattered and Ritchie ordered them to evacuate. In a series of attacks around the Knightsbridge and El Adem boxes on June 11-13, Rommels forces dealt the British armor a severe defeat. After abandoning Knightsbridge on the evening of the 13, Ritchie was authorized to retreat from the Gazala Line the next day. With Allied forces holding the El Adem area, the 1st South African Division was able to retreat along the coast road intact, though the 50th (Northumbrian) Division was forced to attack south into the desert before turning east to reach friendly lines. The boxes at El Adem and Sidi Rezegh were evacuated on June 17 and the garrison at Tobruk was left to defend itself. Though ordered to hold a line west of Tobruk at Acroma, this proved unfeasible and Ritchie began a long retreat back to Mersa Matruh in Egypt. Though Allied leaders expected Tobruk to be able to hold out for two or three months on existing supplies, it was surrendered on June 21. Captured Allied soldiers march out of Tobruk, June 1942. Bundesarchiv, Bild 101I-785-0294-32A / Tannenberg / CC-BY-SA 3.0 Aftermath The Battle of Gazala cost the Allies around 98,000 men killed, wounded, and captured as well as around 540 tanks. Axis losses were approximately 32,000 casualties and 114 tanks. For his victory and the capture of Tobruk, Rommel was promoted to field marshal by Hitler. Assessing the position at Mersa Matruh, Auchinleck decided to abandon it in favor of a stronger one at El Alamein. Rommel assaulted this position in July but made no progress. A final effort was made the Battle of Alam Halfa in late August with no results.

Thursday, November 21, 2019

How Stereotypes Affect Us Assignment Example | Topics and Well Written Essays - 500 words

How Stereotypes Affect Us - Assignment Example The safety and equality of the blacks are still not unconditional. Steele writes, â€Å"They come from the way a society, at a given time, is organized around an identity like me. That organization reflects the place, as well as the ongoing individual and group competition for an opportunity and the good life.†(3) An undeclared engagement is going on at every stage, in every segment of life of blacks and whites. Its emphasis and intensity may vary, nevertheless it is there, and it has not been erased from the social norms of the people of America. This position gives room for some to enjoy at the cost of suffering of others. Those others are mainly blacks. Defined and undefined activities related to ethnic segregation move together at the cost of the blacks. Stereotype threat is real. Its impact is more in the educational institutions, the abode of combustible younger generation, both whites and blacks. They have the knowledge of American history, whose pages are daubed in the bloodshed of racism. Explaining through an example, the author elaborates the nature of fear psychosis born out of stereotype threat, by citing the experience of Brent Staples, a psychology graduate student walking down the streets of Chicago’s Hyde Park neighbourhood. â€Å"I became an expert in the language of fear. Couples locked arms or reached for each other’s hand when they saw me. Some crossed to the other side of the street. People who were carrying on conversations went mute and stared straight ahead, as though avoiding my eyes would save them.†(6) By educating an individual, you are educating a generation. Therefore, educational institutions, where students of different ethnic groups, blacks and whites meet for a common purpose, are t he right places to initiate the process of reconciliation. Steele also highlights the importance of role models and argues, â€Å"They dramatically reduced stereotype threats impairment of women’s math performance by reminding them just before the test, the positive women role models.†(94)  Ã‚  

Wednesday, November 20, 2019

Why does 'Capturing the Friedmans' divide audiences so often Is this Essay

Why does 'Capturing the Friedmans' divide audiences so often Is this the result of its subject matter or how the film presents its material - Essay Example It is a fact to state that the material of the movie is the major cause for the division of the audience. There may be slight connection to the subject matter but if the documentary had revealed the facts in accord with truth without tempering with it than the audience may have not been divided themselves in to two different perspectives (Leadership Council, 2002). However, before the paper matures in to an argument it is essential to be familiar with all details of the case. The following paper is weaved using authentic websites, documents, books, and journal articles in order to present an argument which is solid in its essence and is impressionable. However, the use of websites is in excess in order to gain insight into the minds of its audience, who holds a conflicting view either with the documentary or a conflict of view among themselves. The conflict in my opinion after extensive research, occurs due to the material of the documentary, otherwise the case stands clear (Richard Webster, 2004). From today, 25 years ago the police officials came to the doorstep of the Friedmans to arrest Arnold Friedman for sexually abusing children. Arnold was soon exposed to the charges that were levied on him due to rapping dozens of boys inside his house form his computer class that he conducted at home. Although, the police was able to find the pornographic magazines there were no other such as physical evidence, found that would stand as a solid proof of the crimes that Arnold was convicted. Moreover, the movie did not show that there were any complaints before Arnold was convicted with the crime (Leadership Council, 2002). Before the giving a verdict it is imperative to take in to consideration the way the truth was moulded and fashioned and also to consider the arguments presented by the director in order to provide a statement to the critics. It is

Monday, November 18, 2019

Short proposal Essay Example | Topics and Well Written Essays - 250 words

Short proposal - Essay Example I also do have confidence that my group members will provide me help. Conclusion Parking lots are an important part of institutions but their mismanagement or their use by other customers can make institutional implications. The outcome for this parking dilemma appears as a burden both on community managers and on parking lots. It consumes time, waste energy, enforce financial burdens, and increase the management of traffic. Many customers, students, and passengers have to make their parking after a cumbersome travel in the vicinities of the main parking lots and sometimes, this become a real dilemma. Some vicinity areas are so plagued and there is chance to be obstructed by someone trying to rob passengers. The situation also becomes highly vulnerable for people with disabilities. Students of University of Colorado Denver and Metro State College are really in trouble as they even paid to RTD parking but still can’t get transited through mass transit. I would like to request M rs. Zambon, to provide permission so that we can implement our study design to investigate on the RTD parking issues. The study is very feasible and has instrumented every aspect to make results an invaluable contribution to the community development.

Friday, November 15, 2019

Luminescence in Low-dimensional Nanostructures

Luminescence in Low-dimensional Nanostructures NANO AU RSY Luminescence in Low-dimensional Nanostructures: Quantum Confinement Effect, Surface Effect Whenever the carrier localization, at least in one spatial direction, becomes comparable or smaller than the de Broglie wavelength of carriers, quantum mechanical effects occur. In this limit the optical and electronic properties of the material change as a function of the size and the system is called a nanostructure. As the size is reduced the electronic states are shifted toward higher energy and the oscillator strength is concentrated into few transitions. Nanostructures are classified by the number of dimensions in which the carriers are confined or, alternatively, free to move. In case of confinement in only one spatial direction, the nanostructure is named a quantum well (QW). The carrier motion is frozen in one dimension but electrons and holes can still freely move over the other two directions. Therefore the QW is a quasi two-dimensional (2D) system. A structure which provides carrier confinement in two directions, allowing the motion along the remaining dimension, is calle d quantum wire (QWR) and it is a quasi 1D system. In the case of confinement in all three spatial coordinates, the nanostructure is denominated quantum dot (QD). QDs are 0D systems since the carrier motion is completely frozen. The physics of the quantum size effect relies on the Heisenberg uncertainty principle between the spatial position and kinetic momentum of a quantum particle. It is not possible to measure both the momentum and position of a particle to an arbitrary precision. The product of the standard deviation in space and momentum satisfies the uncertainty relation: à ¢- ³x.à ¢- ³p ≠¥ à ¢Ã¢â‚¬Å¾Ã‚ /2 (1.26) This equation means that the smaller is the carrier localization in the nanostructure, the larger is the spread in the momentum p, or, better said for semiconductor systems, in the crystal momentum à ¢Ã¢â‚¬Å¾Ã‚ k. The energy may still be well defined, but the momentum is not well defined. In bulk systems, for states around the edge of conduction and valence band, the dependence of the energy on the wavevector k is quadratic, Where m* is the carrier effective mass. Following this equation, the spread in the momentum à ¢Ã¢â‚¬Å¾Ã‚ k gives minimum kinetics energy to the localized particle. This is in contrast with the classical physics, where the lowest energy state in whatever potential corresponds to no kinetic energy. The uncertainty principle of quantum mechanics imposes a positive zero-point energy, which is approximately inversely proportional to the square of the nanostructure size. Therefore, the energy of theground state of electrons and holes in semiconductor nanostructures not only depends on the materials but also on the dimension of the confinement region. Nanostructured materials with a size range of 1-100 nm have been the focus of recent scientific research because of their important optical properties, quantum size effects, electrical properties, chemical properties, etc. The low-dimensional materials have exhibited a wide range of optical properties that depend sensitively on both size and shape, and are of both fundamental and technological interest. The ability to control the shapes and size of nanocrystals affords an opportunity to further test theories of quantum confinement and yields materials with desirable optical characteristics from the point of view of application. The exciting emerging important application of low-dimensional nanocrystals is in light-emitting diodes (LEDs) and Displays. Recently, there has been much recent interest in low dimensional systems such as quantum well (two dimensional system), quantum wire (one dimensional system) and quantum dot (zero dimensional system). Optical properties of low-dimensional systems are substantially different from those of three-dimensional (3D) systems. The most remarkable modification comes from different distributions of energy levels and densities of states originating from the spatial confinement of electrons and holes. The simplest model for two dimensional (2D) systems is that of a particle in a box with an infinitely deep well potential, as shown in Figure 1.6. The wave functions and energy levels in the well are known from basic quantum mechanics and are described by: ÃŽ ¨n(z)=(2/Lz)1/2 cos ( nÏ€z/Lz ) (1.28 ) n = 1,2,3,†¦. (1.29) Figure 1.6: A particle in a box made of infinitely tall potential barriers In semiconductor quantum wells (two dimensional (2D) systems such as layered materials and quantum wells), both electrons and holes are confined in the same wells. The energy levels for electrons and holes are described by [1.8]: (1.30) (1.31) Where and are the effective masses of electron and hole, respectively If electric dipole transitions are allowed from the valence band to the conduction band, the optical transition occurs from the state described by nh , kx , and ky to the state described by ne, kx and ky . Therefore, the optical transition takes place at energy: (1.32) Where ÃŽ ¼ is the reduced mass given by ÃŽ ¼-1 = The joint density of states Ï 3D for the 3D for an allowed and direct transition in semiconductors is: (1.33) The joint densities of states for 2D, 1D and 0D systems are: (1.34) (1.35) (1.36) Where ÃŽ ¸ is a step function and ÃŽ ´ is a delta function. The sum of quantum confinement energies of electrons and holes are represented by El , Em and En ; where El , Em and En refer to the three directions of spatial confinement Obviously the physics of the nanostructures strongly depends on their dimensionality (Figure 1.7). In a semiconductor structure a given energy usually corresponds to a large number different electronic states resulting from the carrier motion. In a bulk material where the motion can occur in three different directions the density of states increases proportionally to the square root of the energy. In quantum wells the motion in the plane gives a staircase DOS, where each step is associated with a newstate in the confining potential. In quantum wires a continuum of states is still present, but strong resonances appear in the DOS associated with the states in the confining potential. Finally in quantum dots only discrete energy states are allowed and the DOS is therefore a comb of delta functions. The possibility to concentrate the DOS in a reduced energy range is extremely important for a large variety of fundamental topics and device applications. It is at the base of the quantum Hal l effect in quantum well (QW), of the quantization of the conductance in quantum wire (QWR), and of the single electron tunnelling in QDs. In the case of lasers the presence of a continuum DOS leads to losses associated with the population of states that do not contribute to the laser action. Conversely, the concentration of the DOS produces a reduction of the threshold current and enhances the thermal stability of the device operation. Clearly this property is optimized in QD structures. Due to the three-dimensional carrier confinement and the resulting discrete energy spectrum, semiconductor QDs can be regarded as artificial atoms. Figure1. 7: Density of states of three-dimensional ( 3D ) bulk semiconductors, a two dimensional ( 2D ) quantum well, a one dimensional ( 1D ) quantum wire, and zero dimensional ( 0D ) quantum dots. The most striking property of nanoscale semiconductor materials is the massive change in optical properties as a function of size due to quantum confinement. This is most readily manifest as a blue-shift in the absorption spectra with the decrease of the particle size. The blue-shift in the absorption spectra with decrease of particle size in semiconductor nanoparticles is due to the spatial confinement of electrons, holes, and excitons increases the kinetic energy of these particles. Simultaneously, the same spatial confinement increases the Coulomb interaction between electrons and holes. The exciton Bohr radius is a useful parameter in quantifying the quantum confinement effects in nanometer size semiconductor particles. The exciton Bohr radius is given by [1.8]: (1. 37) and an inequality holds. Here and are defined as: and (1.38 ) Where ÃŽ ¼ is the reduced mass given by are the effective masses of electron and hole, respectively. And also ÃŽ µ is the dielectric constant, à ¢Ã¢â‚¬Å¾Ã‚  is the Planck constant. As the particle size is reduced to approach to the exciton Bohr radius, there are drastic changes in the electronic structure and physical properties. These changes include shifts of the energy levels to higher energy, the development of discrete features in the spectra (Figure 1.8). Figure 1.8: A schematic models for the energy structures of bulk solids, nanoparticles and isolated molecules. The quantum confinement effect can be classified into three categories: the weak confinement, the intermediate confinement and the strong confinement regimes, depending on the relative size of the radius of particles R compared to an electron , a hole , and an exciton Bohr radius , respectively. In strong confinement (R , ), the individual motion of electrons and holes is quantized and the Coulomb int eraction energy is much smaller than the quantized kinetic energy. The ground state energy is [1.8]: (1.39) Where the second term is the kinetic energy of electrons and holes, the third term is the Coulomb energy, and the last term is the correlation energy. In intermediate confinement ( ), the electron motion is quantized, while the hole is bound to the electron by their Coulombic attraction. In weak confinement ( ), the center-of-mass motion of exciton is quantized. The ground state energy is written as: (1.40 ) Where is the translational mass of the exciton Figure 1.9: Size dependence of band gap for CdS nanoparticles. In strong confinement, there is appearance of an increase of the energy gap (blue shift of the absorption edge), which is roughly proportional to the inverse of the square of the particle radius or diameter. For example, it can be observed from Figure 1.9 that the strong confinement is exhibited by CdS particles with diameter less than ~ 6 nm (R ~ 3 nm), and this is consistent with the strong confinement effect for particles with The luminescence dynamics in low-dimensional nanostructures also deals with the interaction of light with the material. The interaction of light depends strongly on the surface properties of the materials. As the size of the particle approaches a few nm, both surface area to volume ratio and surface to bulk atom ratio dramatically increases. The basic relationship between the surface area to volume ratio or surface atoms to bulk atoms and the diameter of nanoparticles can be seen in Figure 1.10. Figure 1.10: Surface area to volume ratio and percentage of surface atoms (%) as a function of particle size. It is observed that the percentage of surface atoms in corner and edge vs. Particle sizes display dramatic increase when the size is decreased below a few nm, whereas percentage of face atoms decreases. For particles of ~1 nm, more than 70% atoms are at corners or edges. This aspect is important because light interaction with material highly dependent on the atomic scale surface morphology. As in nanoparticles, a large percentage of the atoms are on or near the surface, therefore, surface states near the band gap can mix with interior levels to a substantial degree, and these effects may also influence the spacing of the energy levels. Thus in many cases it is the surface of the particles rather than the particle size that determines the optical properties. Optical excitation of semiconductor nanoparticles often leads to both band edge and deep trap luminescence. The size dependence of the excitonic or band edge emission has been studied extensively. The absence of excitonic or band edge emission has attributed to the large non-radiative decay rate of the free electrons trapped in these deeptraps of surface states. As the particle size becomes smaller, the surface to volume ratio and hence the number of surface states increases rapidly, reducing the excitonic emission. The semiconductor nanoparticles exhibit broad and Stokes-shifted luminescence arising from the deep traps of surface states [1.25 – 1.27].

Wednesday, November 13, 2019

The Eyes of the Dragon Essays -- essays research papers

â€Å"A kingdom is in turmoil as the old King Roland dies and its worthy successor, Prince Peter, must do battle to claim what is rightly his. Plotting against him is the evil Flagg and his pawn, young Prince Thomas. Yet with every plan there are holes – like Thomas’s terrible secret. And the determined Prince Peter, who is planning a daring escape from his imprisonment†¦Ã¢â‚¬  (very first page)   Ã‚  Ã‚  Ã‚  Ã‚  The sequence of events that occur in the plot go like this: Two sons are born from Queen Sasha and King Roland, Prince Peter then Prince Thomas. Fearing that the Queen Sasha would ruin his plans, Flagg, the several hundred years old magician and royal advisor succeeded in deposing of her when Peter is only five. Eleven years later, after Peter served the King his nightly glass of vine, Flagg came in and killed Roland by offering him a second glass of wine that was poison. Peter was found guilty of the murder, as Flagg had planned, and was sentenced to life imprisonment atop a tower called the Needle by Anders Peyna, the Judge-General. Peter would spend a good five years in the Needle until he decides to make a successful escape, only to encounter Flagg for a final confrontation.   Ã‚  Ã‚  Ã‚  Ã‚  Thomas, one of the main characters, is a particularly interesting character for several reasons. First the narrator, portrayed as a storyteller, describes Thomas as the weak, vulnerable, sad, confused, lonely younger brother of Prince Peter, who was the heir of...