Radio activity Lab Report Example | Topics and Well Written Essays - 1250 words

Radio activity - Lab Report Example This experiment illustrates that coins can be used in the laboratory to visualize the process of radioactivity. Radioactivity is a terminology used to refer to the spontaneous changes that occur in the nucleus of unstable atoms accompanied by release particles or electromagnetic radiation. In some cases, it is caused by conflict of two strongest in nature. In connection to this, there are several nuclear isotopes. These isotopes emit radiation and are unstable; some of the radiations emitted by these isotopes are gamma, alpha, and neutron emissions. Gamma radiations are photons that are packets of electromagnetic energy. In the electromagnetic energy spectrum, gamma radiations are the most energetic ionizing radiation. They have about 10,000 more energy than the photons that are found in the visible electromagnetic spectrum. In addition, they also have no electrical charge and mass. Since they have high energy, they can travel at the speed that is equal to that of the light and go for long distances without losing their energy. As a result, they are very dangerous and pass through the human body. Alpha particles, on the other hand, have two protons and two neutrons and, therefore, are the same as a helium particle. When an alpha particle is emitted the parent nucleus changes to another element. A neutron particle on the hand has no charge and, therefore, is neutral. Radioactivity is a random process therefore it is impossible to predict the specific time when a particular atom will decay (Cutnell and Johnson 6). Due to the random nature of radioactivity it is, therefore, a probability event that is entirely dependent on chance. In radioactivity, the half-life is the time taken for the number of radio nuclei of a radioactive sample to reduce to half. The randomness of radioactivity process can be compared to the tossing of a coin activity because the chances of a head or a

African American Injustice Essay Example for Free

African American Injustice Essay â€Å"In the eyes of white Americans, being black encapsulates your identity. † In reading and researching the African American cultural group, this quote seemed to identify exactly the way the race continues to still be treated today after many injustices in the past. It is astonishing to me that African Americans can still stand to be treated differently in today’s society. In reading â€Å"Blacks in America†, Andrew Hacker states that â€Å"being black in America has consequences in areas of: wealth, identity, raising children, occupational opportunities, place of residence, and treatment in the criminal justice system. † To be honest, and I feel bad saying that I already knew this was happening to African Americans. I have heard stories of blacks not getting jobs; regardless of how qualified they are for the position, because of the color of their skin. I have heard stories, and even witness black children getting picked on in school because of the simple fact that they are black. I watched a video in school where a black family moved into a white neighborhood, and before long all the white families had moved out because they didn’t want a black family in their neighborhood. This was confirmed by Hacker in my research in the quote, â€Å"Almost all residential areas are entirely black or white. † I have also seen videos of African American men getting beaten by white arresting officers, and have heard stories of many black men being stereotyped by policemen. This must be why Hacker states â€Å"When white people hear the cry, â€Å"the police are coming! † it almost always means, â€Å"Help is on the way. † However blacks cannot make the same assumption. † These are all reports and events that I think the average American has seen before, but yet most people, including myself, continue to just shrug of and ignore. I guess it’s something that I might have subconsciously accepted, or maybe refused to think more deeply about. In reading and researching, I reaffirmed knowledge that I refused to take a greater note of. I wouldn’t say I learned anything new, because I knew what I wanted to focus on. A quote from Andrew Hacker’s article summarizes the above best, â€Å"In the eyes of white Americans, being black encapsulates your identity. † It may be easy to tell how I am going to focus this anthology. I am going to focus it on the injustices that African Americans continue to face in the United States today. That being, I know exactly what I need to get out of my interviewees, but it is probably a sensitive subject for some of the people I need to interview. I am not black, and I don’t know what it feels like to face this discrimination in everyday life. I can understand the tenderness that African Americans must feel then, when revealing and talking about their experiences with discrimination. I would think then, that it must be especially sensitive to talk about with a person from the race that they receive this everyday discrimination. It will be interesting to hear all the different types of prejudice that my interviewees have received throughout their lives. I would imagine that it ranges from just a look, or the way white Americans act around them, to voiced and physical altercations between themselves and white Americans. Hacker at times seems to be speaking directly to African Americans as he describes these altercations, â€Å"So many of the contacts you have with them (white Americans) are stiff and uneasy, hardly worth the effort. † But to me, that is exactly what the problem is. Why would it not be worth the effort? The first step to take for the uneasiness between the two races to cease to exist is for us (all people) to stop seeing color because once we act differently around the other is where all the problems seem to start. The second step is to make these contacts worth the effort. If we choose to continue to stay in our own comfortable circle of race, when is the problem ever going to end? The answer is never. My opinion as a white 18 year old is that most of the blame lies on the white race. Imagine being eyed every time you go into a store, having your car searched for no reason, or greeted warily at restaurants all because the color of your skin is different. We ignore this daily discrimination because no cares enough anymore to take notice that it happens every hour, every day somewhere in the United States. Will it ever stop? Not until we each take the steps to make it. A recent census commercial I’ve seen said â€Å"We (United States) can’t move forward until you mail it back. † I believe that our country can’t move forward and truly be great until we make sure these daily iscriminations are eliminated from our society. In this project, I will interview African Americans on their personal experiences with discrimination, how they handle it, and if they think anything can be done about this problem. Sources: Andrew. 1999. Blacks in America. Pp. 160-168 in The Meaning of Sociology, 6th ed. , edited by Joel Charon. Upper Saddle River, NJ: Prentice Hall. A Time to Kill. Dir. Joel Schumacher. 1996. African American History. University of Washington Libraries. Web. 02 Apr. 2010. .

Solving Problems And Making Decisions

Solving Problems And Making Decisions SitesPower is a training institute specialized in providing Technical courses in IT and courses in Business Management fields. It is based in Dubai and with a branch in Sharjah. It has been approved by the UAE Ministry of Education and it is an approved and accredited institute from awarding bodies like ILM, Autodesk, and Microsoft etc. whose courses and trainings are delivered in the institute. As a trainer in SitesPower, I provide training courses in ICDL, Microsoft Office Applications (2007-2010), and a wide range of certified courses in Business Management to deliver specific skills that students need. Also, I accomplish a lot of tasks assigned to me by my manager, and that requires a lot of time, effort and preparation to complete those tasks on time. Trainers face many problems in training programs, but some of these problems are frequent and sometimes worrying, such as: problems of students failing in the ICDL Exams, and delay in receiving the certificate due to students repeating the course or not being able to complete the course. Before talking about this issue, I will explain through the following chart: the administrative and organizational structure of the training centre SitesPower Sharjah branch in which I work there Present situation (Analysis of the problem) The International Computer Driving License Course (ICDL) is the most important certificate for a large number of employees or job seekers, particularly in government jobs in the United Arab Emirates. For this reason, the demand for this certificate has increased over many years and has become a key requirement for employment in many companies. Because of its importance, the candidates enrol in our training centre programs and attend ICDL classes for the preparation for ICDL Exams so as not to be an obstacle to access to jobs or losing their current jobs. The main problem that we face with these courses is the failure of some students in the ICDL exams, and therefore they will not get the certificate or causing a delay to obtain the certificate due to repetition of the course or the exam, which leads to a major embarrassment and might lose job opportunities. First of all, I will explain the components of the ICDL sessions, rules and how to obtain the certificate in order to understand the causes of students failure in the exams. ICDL Course consists of the following Modules: IT (Information Technology) Using Computer and Managing Files (Operating System) Word Processor (Microsoft Word) Spread Sheets (Microsoft Excel) Database (Microsoft Access) Presentations (Microsoft PowerPoint) Web browsing and Communication (Internet Explorer Outlook Express) This course duration is seven weeks, i.e. average of 9 hours for each module. The candidate must pass the exam assessments for each module to obtain the certificate. Exams are provided on the web through a software program, and its files contains exercises shown on a computer screen and questions bar shown on the screen with a time calculator to calculate the time required to complete the test. The Exam timing prescribed for each subject is 45 minutes. Questions are categorized into groups according to the exam module, but the numbers of questions for each module are 36 questions. The Candidate should answer these questions within 45 minutes and has to get the rate of 75% or more to pass in the exam. Based on the above, the main problem I encounter during teaching and training students for the exam is some repetition in these certification exams and this will affect negatively on the students and also on the training centre and its employees. There are many reasons that I will clarify them later, some of these reasons are: Inefficient trainee using the computer Inability to concentrate during the lecture and thus no interaction with the instructor. Lack of opportunity to review the material and training tests on these exams. The student may not be able to answer all questions within the time allocated for the exam. Student may face a problem in understanding the wording of the question. There are reasons linked to the technical aspects of the ICDL Exams online, hardware and software used may affect the result of the exam and cause the failure of the student. We can classify the above mentioned problems into two categories: First: Expected problems Problems associated with weak efficiency trainee in using the computer, Exam system, and inability of the trainee to answer all questions within the limited time. These problems occur continuously, and we face them in every training session including: Number of students enrolled in the training course. Difference in the level of competencies and comprehension of the trainees in using the computer. Second: Unexpected problems The technical problems associated with the exam system, the computer used by the trainee during the exam or software used by trainee to answer questions. These problems occur few and only appear during the exam, but may cause either postpone the exam or failure of the trainee and thus give him a chance to repeat the exam again. The problems that I mentioned earlier, both expected and unexpected adversely affect everyone. First of all The candidate will be affected by these problems due to the failure and delay in receiving the certificate, which means losing job opportunities or may lead to termination of employment. Other candidates will also be affected by these problems because of their fear from making the same mistakes and problems that have occurred with their colleagues and thus will affect their self-confidence and possibly lead to failure as well. Secondly these problems might also affect the training centre, as it may lead to bad reputation of the training centre as it was unable to address the problems of the trainees and its inability to help the candidate solve these problems and ensure their success in the exam. Thirdly These problems will also affect the trainer in taking part of the responsibility for the failure of the trainee. One of the most important goals that I am trying to achieve through solving these problems mentioned above and in cooperation with the management is to help the trainees to achieve their objective to be certified by developing their computer skills to ensure getting that certificate. Through achieving the objective of the trainees, training centre will achieve its goal and gain a special position among the other accredited training centres in the region. The failure to take any actions to address these problems that I have mentioned above and solve them, will lead to increase the gap between the trainees and the training centre and unable to achieve the training centres goals and the trainees objectives. Investigation and identification of possible solutions to the problem When I started my job at the centre in 2006, as a trainer, I was assigned to give ICDL courses and train candidates on the ICDL practice exams. A lot of candidates joined our training centre programs at that time to get the ICDL certificate. Some of them faced many problems in the exams and failed to get the certificate. During that time, I didnt realize the reasons of those candidates who were failing in the exams. Gathering the information After a few months, the management asked me to start monitoring ICDL exams due to lack of exams testers. But I had to be qualified first in order to be authorized as a tester to monitor these exams. Therefore, I took a training course in the ICDL office in Dubai Internet City on how to monitor and solve problems that might occur during the exams. After taking this course, I had started to understand and analyse the reasons for why candidates were failing in these exams and also to know the nature of ICDL questions. And analyse historical records of exams and result reports. After knowing this, I decided to help candidates to overcome all problems of the exams plus for being an exam tester. In Summary, I gathered the information about the problem from the following sources: My evaluation of the candidates skills during the lectures. Monitoring the Exams Reports of the Exams Evaluation of Possible Solutions Fishbone is a way of analysing problems Super Series from ILM Based on the information gathered above, I have decided to use the Fishbone Tool to analyse this issue by identifying the main reasons and the subsets as shown in the diagram below: Problems in the Network system Difficult terms set out in some exam questions Lack of maintenance of devices before the exam by computer technicians Errors in the booking of exams for candidates Problems in the live exam system Problems in the hardware and software in the users computer The difference between the candidates in their skills The number of candidates in the ICDL course no interaction with the instructor during the lecture No preparation prior to exam Lack of practicing on mock exams Lack of computer skills Causes of student failure in ICDL Exams Candidates ICDL Course Equipment Employees Live Exam System By using the Fishbone analysis tool, I managed to collect all the reasons that might cause the students failure in the exams. After that, I conducted a survey among the candidates in a scale of impact and importance from (1-5), where (No.1 is very weak) and (No. 5 very strong): Identify the areas of improvement that can enrich the overall performance of the candidate in the exam. To know the level of impact on the students failure in the exams No. The Reason of student failure in the ICDL Exams 1 2 3 4 5 1 Weakness in skills, and incompetence and inability to use computer by trainee 31.58% 10.53% 21.05% 15.79% 21.05% 2 No enough time allocated for training on the practice exams at home or at office 15.79% 10.53% 15.79% 31.58% 26.32% 3 Less time of training on the sample exams in the classroom 47.37% 10.53% 36.84% 5.263% 4 The inability to interact with the instructor and the inability to understand his explanation of the modules 31.58% 31.58% 15.79% 21.05% 5 Uncertainty, and lack of understanding of examination program and not knowing how to use it during the exam by the student 26.32% 26.32% 31.58% 5.263% 10.53% 6 Lack of understanding of exam question because of the difficulty of the terms used in the exam 26.32% 21.05% 21.05% 21.05% 10.53% 7 Exam time is not enough 36.84% 15.79% 31.58% 5.263% 10.53% 8 Technical problems associated with the exam software 21.05% 15.79% 31.58% 26.32% 5.263% 9 Technical problems related with the computer user in the exam or technical problem in its software. 36.84% 26.32% 21.05% 10.53% 5.263% 10 Lack of the trainer experience and skills 89.47% 10.53% 11 ICDL Books and materials 47.37% 21.05% 5.263% 10.53% 15.79% Depend on the result shown in the table above I discovered that the most important reasons of student failure in the ICDL Exams were: Weakness in skills, and incompetence and inability to use computer by trainee No enough time allocated for training on the practice exams at home or at office Technical problems associated with the exam software Lack of understanding of exam question because of the difficulty of the terms used in the exam Recommended implementation plan to solve problem According to the results mentioned above, I have recommended to management the idea of taking the advantages of some features that we got form ICDL office, like booking for candidates ICDL exams at convenient and also provide them with practice exam cards. In addition, I have determined some other actions that would help solving these problems. These actions consist of the following points: Determine the number of candidates in each session with maximum number of 12 candidates. Increase the number of scheduled hours for each subject if necessary, and making more practices in the class. Provide each student with practice exam cards with 20 hours training to conduct the necessary training before the exam either in their offices, homes or even in the training centre. Explain the exam system for students at the beginning of each session, providing them with important advices and guidelines to ensure their success in the exam. Aware candidates of the importance of the exam timing, and the importance of answering the questions quickly. Getting help from the computer technician during candidate taking the ICDL exams, to resolve any technical problem that appears during the test. Update the computers and replacing the old one with new one. Making a routine and regular check on the computers, and especially before the ICDL exams. Print the result report of the student after taking the exam when necessary, in order to study the wrong answers with the student to avoid these mistakes next time. After applying these recommendations, and monitored its effectiveness and impact, we managed to: Increase the success rate of the ICDL exams. Reduce the percentage of the problems appearing in these exams to the minimum. Improve the performance of the candidates using of computers. Raise self-confidence of trainees in the exams. Following table show the different between ICDL Results through three years 2011 2012 -2013 2011 2012 2013 (January) Pass 42.85714% 70.58824% 71.42857% Fail 57.142857% 29.411765% 28.571429%

The color purple :: essays research papers

The story really begins in about 1903 with the killing of Celie's father by jealous white guys. Celie's mother goes insane but marries a man who is just using her. When Celie is 14 this stepfather, who she thinks is her dad, begins to rape her, causing the birth of two children which he gives away to a missionary friend of his. Celie's mother dies angry at Celie and, because she's been warned by her stepfather not to tell anyone (but God) who fathered her children, Celie writes letters to God. Later, when her younger sister, Nettie, runs away from home, she comes to the house Celie shares with Mr. ______, her abusive husband who was going to marry Nettie but her stepfather said no, who married Celie so that she could look after his kids from his first marrage. Because Nettie rejects him, he kicks her out of his house and Celie sends her to the same missionaries (Samuel and Corrine) who have unknowingly adopted her children, Olivia and Adam. Nettie goes with them to Africa as a missionary, where she stays for thirty years, faithfully writing letters to Celie, never knowing if she's receving them. After years of abuse, Celie begins to become more optimistic when Shug Avery, a blues singer and old lover of Mr. _______'s, is brought home by him because she's sick, so that Celie can nurse her. Celie and Shug fall in love, and Celie leaves Mr. _______ to go with Shug to Memphis. Here, Shug makes a good living singing and Celie starts designing and sewing pants for Shug, this hobby finally spawning a business. Then, Celie finds out that Mr. _______ had hidden all the letters Nettie had written to Celie over the years. In the letters, which she finally gets to read, Nettie's life is revealed. She and Celie's children, Samuel and Corrine live with the Olinka in a small village in West Africa. They all teach and nurse and Samuel preaches. Corrine lets her thoughts about how strong the resemblance between her adopted children and Nettie fester and, with help from a tropical fever, agonizes herself to death. After she dies, Samuel and Nettie decide to get married. During this all, the Olinka's village is destroyed by an English company, and the Olinka are forced off their land. Adam marries Tashi, an Olinkan, and they all return to America.

The advantages and disadvantages of the country’s hospitality

Before the dawn of civilization, man has traveled far for places unknown to him. Initially the traveling was only done with a purpose of food and shelter, but as time passed by and as we became more and more developed, the need to go to a place without any motive, without any intention started eloping in our minds. This motive free traveling came under the name of â€Å"tourism†.New Zealand is a country that is famous for its breath taking views and is quiet a hotspot for tourists, who want to come to a place which has all in store for people of all ages and backgrounds. Slowly but surely, New Zealand has developed a place for itself in the world’s top destination places, and people from almost everywhere in the world flock to this country to experience its natural beauty and resources. The tourism in New Zealand is bringing in good inflow of foreign exchange to the country and is very helpful to the economy.Even though the main economy of the country is through agricul ture and industrial inputs, tourism has craved a niche in the country, so much that it is estimated that the country’s 10% population is working for the hospitality sector. Increase in tourism, is developing the place more and more, and there can be seen a substantial rise of hotels in the country. International franchises of hotels are keen in opening up more and more of their hotels in the country to suffice the tourist onslaught of the country. The major advantage of New Zealand’s tourism is to the country’s financial background itself, and the major advantages of it can be assessed by the following:‘Tourism is important for New Zealand’s future economic growth. It contributes $18.6 billion to the economy each year — 9% of New Zealand’s gross domestic product. It is also an important source of employment. One in every10 New Zealanders works in the tourism industry. Tourism is our largest export sector. International visitors contrib ute $8.3 billion to the economy each year, which accounts for 19.2% of export earnings. During 2006, 2.4 million international visitors arrived in New Zealand’(Courtesy: ‘New Zealand’s Tourism Strategy 2015’. Retrieved on April 10, 2008, from site http://www.nztourismstrategy.com/files/NZTS2015%20final.pdf)Tourism no doubt is very advantageous for New Zealand, as apart from pumping in money, is reviving the pride and refurnishing small town of the country, as now they have become major tourist hotspots. Tourism also is making the government revamp places that include parks and museums, and in one way local heritage is being preserved and well maintained because of tourism.  The major disadvantage that can be considered is because of this high amount of tourism is that the hotels that are coming up every year, are causing damage to the flora of the country. The country in order to suffice high expectations is experiencing rapid changes in climate due to g lobal warming. Also the high expectations are taking its toll on the labor market, and the hospitality industry is currently facing labor shortage and skilled manpower shortage at the moment. Migrating people from just for the sake of hospitality sector might sound beneficial, but then New Zealand which is currently out of migration woes, might start suffering too, like other western countries. Also to motivate high amount of tourism is to relax visa procedure for entering the country, which is the biggest disadvantage as it is open invitation for people trying to become illegal immigrants and even maybe to terrorism. The country has it advantages and disadvantages for hospitality, but one thing that is for sure is the country will always thrive on tourism.Reference:1)  Ã‚  Ã‚  Ã‚  Ã‚   ‘New Zealand’s Tourism Strategy 2015’. http://www.nztourismstrategy.com/files/NZTS2015%20final.pdf2)  Ã‚  Ã‚  Ã‚  Ã‚   http://www.tianz.org.nz/Files/TourismHospWkbkLR.pdf.3)  Ã‚   http://www.fas.usda.gov/gainfiles/200503/146119096.pdf

Feature Story on Teenage Suicide Essay Example

Feature Story on Teenage Suicide Essay Example Feature Story on Teenage Suicide Essay Feature Story on Teenage Suicide Essay Brandon Hirsch Feature Story One brave teenager makes a stand for bullying but ends his life in doing so. 14-year-old Brandon Bitner committed suicide by jumping out in front of a southbound tractor-trailer on routes 11/15, hoping that it would leave an impact and that people will realize how much bullying truly affects people. Bitner, a freshman at Midd-West High School, left his house in Mount Pleasant Mills on November 5th and walked 13 miles until he reached the highway. His parents contacted police when they found his suicide note that he had left behind, but they were too late. They noticed he was missing around 3:45 a. . The contents of the suicide note are still unknown. â€Å"This situation is truly shocking to the school and community because of the student’s character,† said Midd-West Superintendent Wesley Knapp. â€Å"We are still trying to put the pieces together. This student was wonderful, very bright and capable. We had no indication anything like this would happen. † His death came just days after an anti-bullying assembly held at the high school, but the assembly was not held due to problems with bullying. According to student Brianna Boyer, â€Å"After the assembly, no one took it seriously, and joked around about it. Former Midd-West student Erin Barnett also spoke out about this incident: â€Å"Bullying should be addressed in every school, and should have a punishment. † Even though Bitners death was unexpected, bullying in his high school was very common but there was never a reported incident. : â€Å"Anyone in our school who looks different is tortured,† said sophomore Emily Beall-Ellersieck. â€Å"Bullying is a problem at our school, and it needs to be dealt with. † Takara Jo Folk, a close friend of Bitner’s, told the press that he killed himself strictly because of the bullying. â€Å"I do not appreciate ids bullying others for their own gratification,† said Folk. â€Å"Because of bullying, one of my closest friends took his own life. † Bullying may seem harmless at times, but it is nothing that should be ignored. There were no signs given off by Bitner that may have given people suspicion of what he was planning to do. He was described by a fellow student as â€Å"emo†. His facebook page was full of references to the â€Å"darkness†, but he also had a lot to say about his love for music, and his violin. Brandon Bitner was a very talented individual. His peers described him as â€Å"extremely gifted†. He was also a very warm-hearted guy. He was so sweet,† said Kendra Lyons, of Middleburg. Whenever she had a problem, Bitner would always try to help her through it. He will be missed by many and the impact he left by doing this has been one that will never be forgotten. Not very many people are brave enough to stand up for something in their life. Brandon Bitner was one of the few who actually took initiative to make a stand for something he had so much trouble with. This dramatic event has been heard across the country and the bravery of one teenager may have bettered the lives of millions. My thoughts and prayers go out to his family and friends.