Energy crisis is one of the most serious problems the world is facing now. Soaring price of oil is not surprising anymore, since its amount have decreased significantly. Many experts predict that natural oil will be gone in the next few decades. So, alternative sources of energy, such as nuclear, are indeed sought after by people.
The principle of nuclear energy is to use the binding energy, which is responsible for maintaining the composition of protons and neutrons, in the nucleus of atoms. The idea of fusion is to combine together light atoms such as hydrogen, and energy will be released during the process. However, using nuclear energy is not an easy thing, especially the fusion reaction. It needs about one hundred million degrees of temperature, which looks impossible for scientists to provide.
However, continuous researches yield a potential solution. This potential solution, tested at an experimental reactor in San Diego, US, could make the next generation of fusion reactors more efficient, saving hundreds of millions of euros a year. (Nuclear Fusion Plasma Problem Tackled). According to Todd Evans, a plasma physicist at General Atomics, a company based in San Diego, California, US, the solution is to apply small currents in the coil around the main reactor to divert the hot particles’ movement so that these particles may not damage the main reactor by hitting it continuously.
Still, the theory behind some experiments may not precisely match the result in reality. Evans notice this problem also occurs in this experiment. His prediction is that the reactors and the diverters will still be damaged heavily, and should be replaced every two or three years.
Nonetheless, this is a great step in making the usage of fusion energy become more efficient. It may induce other solutions to come up, and hence solving the problems of energy crisis.
Kleiner, K. (2006). Nuclear Fusion Plasma Problem Tackled. Retrieved September 29, 2008, from NewScientistTech.
Website : http://technology.newscientist.com/article/dn9202-nuclear-fusion-plasma-problem-tackled.html
Monday, September 29, 2008
Sunday, September 7, 2008
Portfolio 2 - Common Mistake in Relative Pronouns
My common mistake when using English, whether in speaking or writing, is the usage of relative pronouns, especially whose, which, and that. The mistakes usually occur when i am making subordinate sentences. Because subordinate sentences are used frequently in our daily life, so i think it is a good idea to fix the usage of relative pronouns, at least these three words.
First of all, whose can be used for expressing possession of something. The possessor can refer to people, animal, or things. However, i used "whose" only to refer people's possession. For this case of using "whose", it is not that i used it wrongly, but i emphasize that i have a misconception of using "whose".
Second, is the usage of "which". This error actually has a connection with the third point, "that". I did not differentiate the usage of "which" and "that". "Which" should be used in nonrestrictive clauses, while "that" should be used in restrictive clauses. For example, in nonrestrictive clause such as "Asia, which is the largest continent in the world, is divided into five regions", using which instead of that is the right way. For restrictive clause, such as "the man that use a red cap is my father", using that instead of which is the correct way.
These are mistakes that i often make. Correcting the usage of these mistakes will likely to help me communicate better in English.
Exercise
There is a popular teacher called Ms. Tate. The teacher, (which, that) many students were inspired by, taught English literature. However, she has retired 10 years ago. The teacher (which, that) I was talking about now lives in Canada. Ms. Tate, (whose, who) husband is a novel writer, is still replying to the letters (which, that) her past students are writing. It shows how much she still cares for her students.
Ms. Tate's publications, (which, that) have inspired many, are all on my bookshelves. The books (that, which) she wrote is used as textbooks of many English literature courses. Despite its quality, the book (which, that) everybody is talking about does not cost much, and is affordable for many students. Particularly, there is a book (which, that) she wrote was a best-seller. The book, (whose, which) cover is red, was written many years ago. However, the best-seller book, (which, that) was written by her, is still talked about.
Retrieved September 8, 2008, from http://www.cityu.edu.hk/elc/quiz/relativ2.htm
First of all, whose can be used for expressing possession of something. The possessor can refer to people, animal, or things. However, i used "whose" only to refer people's possession. For this case of using "whose", it is not that i used it wrongly, but i emphasize that i have a misconception of using "whose".
Second, is the usage of "which". This error actually has a connection with the third point, "that". I did not differentiate the usage of "which" and "that". "Which" should be used in nonrestrictive clauses, while "that" should be used in restrictive clauses. For example, in nonrestrictive clause such as "Asia, which is the largest continent in the world, is divided into five regions", using which instead of that is the right way. For restrictive clause, such as "the man that use a red cap is my father", using that instead of which is the correct way.
These are mistakes that i often make. Correcting the usage of these mistakes will likely to help me communicate better in English.
Exercise
There is a popular teacher called Ms. Tate. The teacher, (which, that) many students were inspired by, taught English literature. However, she has retired 10 years ago. The teacher (which, that) I was talking about now lives in Canada. Ms. Tate, (whose, who) husband is a novel writer, is still replying to the letters (which, that) her past students are writing. It shows how much she still cares for her students.
Ms. Tate's publications, (which, that) have inspired many, are all on my bookshelves. The books (that, which) she wrote is used as textbooks of many English literature courses. Despite its quality, the book (which, that) everybody is talking about does not cost much, and is affordable for many students. Particularly, there is a book (which, that) she wrote was a best-seller. The book, (whose, which) cover is red, was written many years ago. However, the best-seller book, (which, that) was written by her, is still talked about.
Retrieved September 8, 2008, from http://www.cityu.edu.hk/elc/quiz/relativ2.htm
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