my major(我的专业)
- 格式：doc
- 大小：24.00 KB
- 文档页数：3
The Study of the Fundamental ParticlesAtoms and molecules make up materials, the atomic nucleus and electrons constitute atoms, and the protons and neutrons form nucleus. However, can protons consist of something? Luckily, when you encounter an expert in particle physics and nuclear physics, he tells you yes! This is what I study. I will introduce my major from three aspects: what the fundamental particles are, how to get them, and how to make use of them. First, what the fundamental particles are? So far, the fundamental particles are quarks and leptons. They are made up of the colorful world. There exists 6 kinds of quarks and leptons respectively.Second, how to get these particles? With the development of our technology, many large machines are coming, such as Beijing Electron Positron Collider(BEPC) in China. Through particles collide in those machines, we can get some new particles. By analyzing these new particles,we can get more information about the fundamental particles. For instance, last year, I made a study of Y(4260) particle[1], which is observed by the BARBAR Collaboration.Third, how to make use of those particles? If we comprehend the fundamental particles, including their properties and functions, we perhaps can produce new materials according to our demands in our life. As Jian-Rong Zhang and Ming-Qiu Huang put it: Concerning the real nature of Y(4260), some further theoretical study and experimentalverification are undoubtedly needed[2].Quarks and leptons are the fundamental particles. Because of their size, we need to use machines to find them. Then we can analyze them to get much information about them, which contribute to make new materials. Only when we have the comprehensive understanding of the fundamental particles, can we study further in our field.[1] B. Aubert et al. (BABAR Collaboration), Phys.Rev. Lett. 95, 142001 (2005).[2] Jian-Rong Zhang and Ming-Qiu Huang, JHEP 1011,057(2010).General to NarrowWe Americans are incredibly lazy. Instead of cooking a simple, nourishing meal, we pop a frozen dinner into the oven. Instead of studying a daily newspaper, we are contented with the capsule summaries on the network news. Worst of all, instead of walking even a few blocks to the local convenience store, we jump into our cars. This dependence on the automobile, even for short trips, has robbed us of a valuable experience—walking. If we drove less and walked more, we would save money, become healthier, and discover fascinating things about our surroundings.Starting with an OppositeThe ad, in full color on a glossy magazine page, shows a beautiful kitchen with gleaming counters. In the foreground, on one of the counters, stands a shiny new food processor. Usually, a feminine hand is touching it lovingly. Around the main picture are other, smaller shots. They show mounds of perfectly sliced onion rings, thin rounds of juicy tomatoes, heaps of matchstick-sized potatoes, and piles of golden, evenly grated cheese. The ad copy tells you how wonderful, how easy, food preparation will be with a processor. Don't believe it. My processor turned out to be expensive, difficult to operate, and very limited in its use.Stating Importance of TopicDiseases like scarlet fever and whooping cough used to kill more young children than any other cause. Today, however, child mortality due to disease has been almost completely eliminated by medical science. Instead, car accidents are the number-one killer of our children. And most of the children fatally injured in car accidents were not protected by car seats, belts, or restraints of any kind. Several steps must be taken to reduce the serious dangers car accidents pose to children. Incident or StoryEarly Sunday morning, the young mother dressed her little girl warmly and gave her a candy bar, a picture book, and a well-worn stuffed rabbit. Together, they drove downtown to a Methodist church. There the mother told the little girl to wait on the stone steps until children began arriving for Sunday school. Then the young mother drove off, abandoning her five-year-old because she couldn't cope with being a parent anymore. This incident is one of thousands of cases of child neglect and abuse that occur annually.QuestionsWhat is love? How do we know that we are really in love? When we meet that special person, how can we tell that our feelings are genuine and not merely infatuation? And, if they are genuine, will these feelings last? Love, as we all know, is difficult to define. But most people agree that true and lasting love involves far more than mere physical attraction.Love involves mutual respect, the desire to give rather than take, and the feeling of being wholly at ease.QuotationsMy father stubbornly says, “You can often tell a book by its cover,”and when it comes to certain paperbacks, he's right. When you're browsing in the drugstore or supermarket and you see a paperback featuring an attractive young woman in a low-cut dress fleeing from a handsome dark figure in a shadowy castle, you know exactly what you're getting. Every romance novel has the same elements: an innocent heroine, an exotic setting, and a cruel but fascinating hero.。
