Scientific American 60 Second Science听抄（有音频文件）

kevinliu6883UID: 2338522

kevinliu6883UID: 2338522

I get the podcast mp3 file but could not efficiently compress it. I have to divide it into 3 parts so they can be uploaded. Hope some one get better version of it.

kelediguoUID: 149939

2007-07-02

It’s a question that has been asked by kids, adults and professional physicists: what, if anything, was there before the Big Bang, the ginormous explosion that marked the beginning of the universe, or possibly just the current universe. Because one physicist has published a new model that at least gives mathematical credence to the idea that before we were here another universe collapsed and Big Bang was more like a Big Bounce. That’s according to Penn State’s Martin Bojowald, whose paper appeared in the online edition of the journal Nature Physics on July 1st and will be published in a print edition’s August issue. In Einstein’s general relativity, the Big Bang is a singularity, zero volume, infinite density, and infinitely large energy which is kind of annoying mathematically. Bojowald and other physicists combine General Relativity with quantum physics unknown to Einstein. They then get a starting point for this universe with a non-zone volume and non-infinite energy. So you get valid math results before the point of the Big Bang which would have been a contracting universe with space time geometry similar to our own.

[ 本帖最后由 kelediguo 于 2007-7-3 09:56 编辑 ]

zhenzhen_163UID: 196150

July 02, 2007: 60-Second Science
Math Says Big Bang Was Big Bounce

1. What, if anything, was there…   Please note the punctuation marks.
2. ginormous      This is a slang word. gigantic + enormous = extremely large   :)
3. gives mathematical credence     “Give credence” is a good "chunk" to memorize.
4. which would have been a contracting universe with space-time geometry similar to our own
5. Go to Penn State’s news release for more details. http://www.science.psu.edu/alert/Bojowald6-2007.htm


[ 本帖最后由 zhenzhen_163 于 2007-7-3 08:38 编辑 ]

wizjoUID: 2175360

July 02, 2007: 60-Second Science
"Math Says Big Bang Was Big Bounce"

It's a question that's been asked by kids, adults, and professional physicists. What if anything was there before the Big Bang that ginormous explosion that marked the beginning of the universe, or possibly just the current universe? Because one physicist has published a new model that at least gives mathematical credence to the idea that before we were here another universe collapsed, and the Big Bang was more like a Big Bounce. That's according to Penn State Martin Bojowald, whose paper appeared in the online edition of the Journal "Nature Physics" on July 1st, and will be published in a printed edition in August issue. In Einstein's General Relativity, the Big Bang is a singularity--zero volume, infinite density and infinite large energy--which is kind of annoying mathematically. Bojowald and other physicists combine General Relativy with quantom physics unknown to Einstein. They then get a starting point for this universe with a non-zero volume and a non-infinte energy. So you got valid math results before the point of the Big Bang, which would have been a contracting universe with spacetime geometry similar to our own.

P.S. ls的好细心啊，疑点都澄清了:loveliness:

linkunkun7UID: 2196646

有事离开了一周多，回来继续！
我也觉得单词是难点，熟悉的多，听的就懂，熟悉的不多，听的就不懂。。。
我越看大家讲top down就越迷糊，最早zhenzhen说的时候我还没明白，怎么大家讨着讨着，我就不明白了呢，top down是一种融会贯通理解全文梗概的方法吧，对吗？

vitamin-acUID: 2302762

It's a question that's been asked by kids, adults, and professional physicists. What if anything was there before the Big Bang that ginormous explosion that marked the beginning of the universe, or possibly just the current universe? Because one physicist has published a new model that at least gives mathematical credence to the idea that before we were here another universe collapsed, and the Big Bang was more like a Big Bounce. That's according to Penn State Martin Bojowald, whose paper appeared in the online edition of the Journal "Nature Physics" on July 1st, and will be published in a printed edition in August issue. In Einstein's General Relativity, the Big Bang is a singularity--zero volume, infinite density and infinite large energy--which is kind of annoying mathematically. Bojowald and other physicists combine General Relativy with quantom physics unknown to Einstein. They then get a starting point for this universe with a non-zero volume and a non-infinte energy. So you got valid math results before the point of the Big Bang, which would have been a contracting universe with spacetime geometry similar to our own.

[ 本帖最后由 vitamin-ac 于 2007-7-3 10:44 编辑 ]

woodmanUID: 161906

音频传上

kevinliu6883UID: 2338522

It seems woodman has privilege to upload large file while most members don't.

Actually the compresed file is almost the same size of the uncompressed one. You may directly upload the original file.

kevinliu6883UID: 2338522

There are hot peppers like habanero, then there are sentinel peppers like diligent hananero. Now there is a new variety of thermal nucleus habanero known as Tiger pawn and R habanero. The name comes from its appearance …the brand corporation Tiger’s Pawn.  And NR stands for niemital resistance. The pepper bred by US department of agriculture scientists to be resistant to the Nimital around plants’ Roots. The pepper bring conventionally not engineer, and does way the edu soil fumigants bromad hich will be face out. So how hot is the hot tiger habanero? Habanero is measured with something called scale scope heat scale. A habanero score 5 thousand of scope heat scale. A regular habanero usually scores at least 100 thousand. And Tiger pawn habanero tops the scope heat scale at almost 350 thousand. In fact, there is a legend that eating hananero peppers can have dicide effect, may actually make you death, but only, so if you can not hear your screens.

kevinliu6883UID: 2338522

kevinliu6883UID: 2338522

kevinliu6883UID: 2338522

kelediguoUID: 149939

2007-07-03

There are hot peppers like the halapeno and there are incendiary peppers like the legendary habanero. Now there is a new variety of thermo-nuclear habanero known as the TigerPaw-NR habanero. The name comes from its appearance--the bright orange pepper resembles(多谢dcb) a tiger’s paw and the NR stands for nematode resistant. The pepper was bred by US department of agriculture scientists to be resistant to nematodes, roundworms that attack the plant’s roots. The pepper was bred conventionally not genetically engineered, and does away with the need to use the soil fumigant--methyl bromide which has been phased out. So how hot is the TigerPaw habanero? Pepper hotness is measured on something called Scoville Heat Scale. A halapeno comes in about 5,000 on the Scoville scale. A regular hobonero usually scores at least 100,000 and the TigerPaw hobonero tops the Scoville scale at almost 350,000. In fact, there is a legend that eating habanero peppers can have the side effect of actually making you deaf, but only, so that you cannot hear your own screams.

[ 本帖最后由 kelediguo 于 2007-7-4 09:56 编辑 ]

imoukanUID: 2341546

哪里有标准答案阿