The Present State Of Neutrino Masses :: essays research papers

One of the current questions in physics is whether or not neutrinos have mass and what this mass is. Neutrinos are subatomic particles that have no electrical charge and interact only via the weak nuclear force. They are products of radioactive decay processes, and thus are produced abundantly in our Sun, our atmosphere, and in other astrophysical sources such as supernovae and active galactic nuclei. Millions and millions of them are crossing through the Earth every second, but only very few of them will interact with the Earth. In practice you can say they are invisible. But fortunately we can detect them by building a very large detector and waiting long enough. There are several reasons to search for a possible non-zero neutrino mass. Fermion masses in general are one of the major mysteries/problems of the standard model. Observation or nonobservation of the neutrino masses could introduce a useful new perspective on the subject. Nonzero neutrino masses are predicted in most extensions of the standard model. They therefore constitute a powerful probe of new physics. Also, there may be a hot dark matter component to the universe. If so, neutrinos would be (one of) the most important things in the universe. The observed spectral distortion and deficit of solar neutrinos is most easily accounted for by the oscillations/conversions of a massive neutrino. The largest neutrino detector is the Super-Kamiokande and is located in the Kamioka Mine, about 200 km north of Tokyo. It is water cerenkov detector, which means it is a large (40 meters diameter by 40 meters tall) tank of ultra-pure water viewed by thousands of sensitive phototubes. Super-Kamiokande will address some of the most important open questions in physics today, such as: why does the Sun appear to produce only half as many neutrinos as theory would predict? Do neutrinos have mass? Do protons decay, as predicted by Grand Unification Theory? One source of neutrinos are nuclear reactions. Inside our Sun nuclear reactions are occurring on a gigantic scale. Lots of neutrinos are produced. There are enough of them, that when they reach the Earth they can still be detected. Since physicists can calculate how many of them should be seen, there is a big problem because we see too few, roughly two times too few. This is so called the solar neutrino problem. There can be several solutions to the puzzle. One is that we do not understand the Sun well enough.

Children should stay in school

With the increasingly fierce competition in modern society, people need to make all the efforts to learn new things, acquire new skills and continuously adapt to the fast- developing world since childhood. Most people believe that children should be taught not only the lessons in the classroom but also sports, music and other skills at school, like how to work with other students and how to organize their studies by themselves, etc. However, some other people claim that children should not be living under too much pressure. The question is : Should they or not?Children should stay in school from 8 a. M. Until 6 p. M. , which sounds quite a long time, but having lessons in the classroom is only one part of their school lives. Children also would be allowed to do sports, music and other activities at school in another half-day. For one thing, children who take physical education (PEE) and music lessons during the school day would do better academically, since they help reduce boredom a nd help kids stay focused. And we all know that keeping strong and healthy Is the foundation of learning.For another thing, communication Is very Important In odder society. Children can practice how to play with other students at school, especially when they are asked to do some team-work In some sports and music classes. When I was a little girl, I Joined a Instrumental class, we really needed to learn how to cooperate with each other, otherwise we would repeat again and again until we finally knew the Importance of communication. Bothersome, children could try to learn how to organize their studies, Including the lessons In the classroom, sports and music.People all need to know how to manage their studies. Normally we first make a plan, manage It then try to flash It. Children could learn this at school so they would have very good habits when they grow up. It would be precious treasures In their whole lives. However, a coin has two sides. Some other people think that children s hould not be living under much pressure, they should have enough time to play and have fun. And children should not be forced to learn some sports and music If they are not Interested. They really hope children could have very happy and relaxed childhoods. Would have learnt skills Anyway, In my opinion, people should have learnt skills since childhood because of the rapid-developing society with high competition. Good habits and knowledge are really Important In our lives, especially when we are looking for good unlettered and excellent Jobs when we grow up. However, I believe that children should have opportunities to choose some actively by themselves when they already have should not give them too much pressure?Just fewer exams and more guidance with patience, so children can play for studies and study to play.

Symbolism In Shakespearian Sonnet - 705 Words

We can find three major character in Shakespearian sonnet. The fair youth, the dark lady and the poet himself. From sonnets 127-152 Shakespeare mention the dark. Though there is no specific identity of the dark lady. Some critics said that maybe dark lady’s name was Lucy Nego, or Mary Fitton, or maybe Emilia Lanier. From sonnet 78-86 represents directly poet himself. In sonnet 129,135 136, Shakespeare strongly allude the relationship of Shakespeare with the dark lady. But the relationship has no approval of the society. SOME COVENTIONAL AND COMMANPLACE PARALLELS AND COMPARISM The two main group of sonnets (1-126 and 127-154) discover a number of parallels, some of which are merely conventional and commonplace. In two of the sonnets (46 †¦show more content†¦In the initial 17 Sonnets Shakespeare has tended to hes companion as displaying a wonder which ought to be viewed as a few things to kids and not of a remark lost really the 15 16 and 17 Sonnets check a progress in the theam. In pieces 15 verse is offered as an option technique for guaranteeing everlasting status for excellence of Shakespeares companions; however in the following two work 16 and 17 verse is confessed to be a lacking alternative.And yet the poem 18 which takes after strikes another note of self-assurance when Shakespeare says that, insofar as men can inhale or eyes can see, so long would his work live and keeps his Friends childhood and magnificence alive and new. Also, in the Sonne 19 which takes after Shakespeare a greater amount of the marriage which Shakespeare had started encouraging as a methods for accomplishing everlasting status in the prior sonnets.Here in work 19 , Shakespeare hurls a test at time ,and says that his adoration for his companion would live in his Sonnets for ever youthful. Shakespeares own enthusiasm for his companion in this way settled is imperative if his non-physical association with his companion is to be separated from his physical energy for the dull woman. THE RELATION BETWEEN APPEARANCE AND REALITY The connection between appearance and the truth is another remarkableShow MoreRelatedLiterary Techniques Used in November Cotton Flower by Jean Toomer727 Words   |  3 Pagesdescribing the harsh, sudden and questionable bloom of a cotton flower in the month of November. It is composed of heroic couplets, with a regular rhyme scheme, which is as follows: A, A, B, B, C, C, D, D, E, E, F, G, H, H, but the poem reads like Shakespearian sonnet - three quatrains developing a certain tone and theme, followed by a couplet that undercuts or reverses them. In the beginning it portrays the scuffle for survival of cotton flower during November’s harsh winter weather; but towards the end