JJG Journal JJG日报

Remember this little rule from High School physics or chemistry class?请记住这个小规则从高中物理或化学课堂？ Usually taught as: No two electrons can occupy the same quantum states at the same time.通常教的：没有两个电子可以占用相同的量子态在同一时间。 Or, more generally, for those of us who went to school beyond the High School level: No two identical Fermions may occupy the same quantum state simultaneously.或更一般地说，对于我们这些谁去上学超出高中水平：没有两个相同的费米子可能占据相同的量子态同时进行。

Have you ever asked WHY this is so?你有没有问这是为什么呢？ Do you have an intuitive way of explaining the underlying cause for the above rule to your 12 year old kid, say?你有一个直观的解释方式的根本原因为上述规则，你12岁的孩子，说什么？ Not to worry.不用担心。 At the time of this writing  no one has such an intuitive and fundamental explanation.在编写本文件时没有人有这样一个直观的和基本的解释。 I recall reading ... Continue Reading »我记得读...继续阅读»

If you take a step back and look at what we know about the Universe you’ll quickly realize that ALL our knowledge about distant space comes from measuring light that is emitted by far-away astronomical objects.Thus any experimental technique that promise to dramatically increase the accuracy and stability of measuring light is a big deal for observational astronomers.如果你退后一步，看看我们所知道的宇宙你会很快认识到，我们的所有知识，遥远的空间来自于测量光发射的是遥远的天文objects.Thus任何实验技术的承诺，大幅增加的准确性和稳定性的测量轻是一个很大的交易观测的天文学家。 In a recent issue of Science such a big deal was published.在最近的问题， 科学这样一个大问题已经出版。 It’s called a Laser Frequency Comb and works ... Continue Reading »这是所谓的激光频率梳和工程...继续阅读»

as a follow-up to a previous post : It turns out that John McCain has recently submitted his positions to the Science Debate 2008 list of 14 issues.作为会议的后续行动到以前的帖子：原来，约翰麦凯恩最近提出了他的立场的科学辩论2008年的14名单的问题。 Both candidates’ statements can be found here .两位候选人的发言可以在这里找到。

Here’s my take on both candidates’ positions:这是我的就两位候选人的立场：

1. 1 。 Innovation创新

Sen Obama proposes a doubling of government funded basic research expenditures over the next decade.森奥巴马提出了一倍的政府资助的基础研究支出在未来十年。 He quotes detailed statistics that frame the issue.他引用具体的统计数字，框架的问题。 He proposes ... Continue Reading »他建议...继续阅读»

It’s incredible how things have changed in the last couple of hundred years, or so.这是多么不可思议的事情发生了变化在过去的一百年，或做。 Up until that time, mankind thought that it was the crown of creation, the sole purpose for the existence of the Universe.直到那个时候，人类认为这是皇冠上创造的唯一目的存在的宇宙。 Then came the realization that mother earth is not the center of the solar system and that things don’t literally revolve around us.后来认识到，大地母亲不是中心的太阳能系统，事情并非真正围绕在我们周围。 Oh well, we were still pretty important.噢，我们仍然非常重要。 Then came the insight that we humans are just the most recent link in the chain of Primate Evolution and that in fact Primates themselves evolved from little rodents, etc. But the least we could do is name ... Continue Reading »然后是敏锐的洞察力，我们人类只是最近的环节灵长类动物进化，而且在事实上灵长类自己从没有啮齿动物等，但至少我们可以做的是名称 ... 继续阅读»

This is something that has been bothering me for a while.这是一直困扰我一段时间。 The way most of us here in the United States of A. take the availability of safe drinking water for granted.大多数的道路，我们在美国的字母a.采取提供安全的饮用水是理所当然的。 Yet, lack of potable water is one of the major problems for the rest of earth’s population: 1.3 billion people lack access to it.然而，由于缺乏饮用水的主要问题之一，其余的地球人口： 1.3亿人无法获得它。 Millions of people die each year because of this, among them approximately 6,000 children every day .数以百万计的人死于每年因为如此，其中包括约6000儿童每天 。 This number will go up.这个数目会上升。 The USA does not have a water policy.美国没有水的政策。 Let me repeat that: Your government does not have a coherent plan to ensure future availability of safe drinking ... Continue Reading »让我再说一遍说：贵国政府没有一个连贯的计划，以确保未来的供应安全的饮用水...继续阅读»

What do you think is the most important thing that we’ve learned by studying nature?你觉得是最重要的事情，我们学到了学习的性质？ Is it that matter is composed of identical, indivisible subunits called atoms?难道这个问题是由相同的，不可分割的单位称为原子？ Is it Plate Tectonics?这是板块构造？ Or maybe the insignificance of earth in the incomprehensibly vast cosmos?或者，也许微不足道的地球在宇宙广大不可思议？

In my book it is Evolution.在我的书是进化。 The fact that every living thing on this planet evolved from microbial life is far and away the most influential concept that we’ve learned so far.事实上，每一个生活的这个星球上演变而来的微生物生命是远远以外最有影响力的概念，我们学到了迄今。 This fact is so surprising that a majority of us still can not accept it.这一事实是令人惊讶的是，大多数我们仍然不能接受。 You don’t hear many people doubting the correctness of atomic ... Continue Reading »你不会听到许多人怀疑的正确性原子...继续阅读»

Yesterday’s Science Daily reported on the results of a recent extensive study that found a correlation between regular physical exercise and aging: Sedentary Lifestyles Associated with Accelerated Aging Process .昨天的科学报道的结果，最近的广泛研究，发现了关系经常体育锻炼和老化： 静态的生活方式伴加速老化过程 。 For most people that exercise on a regular basis the results of this study are not surprising.对于大多数人来说，这项工作定期这项研究的结果并不让人惊奇。 Taking pills on a regular basis is good for the pharmaceutical industry but does little else.以药丸定期有利于制药业，但没有其他就无能为力了。

Here’s my subjective rating of the relative importance of lifestyle choices that will ... Continue Reading »这是我的主观评价的相对重要性的生活方式选择，将...继续阅读»

Sorry, ... Continue Reading »很抱歉， ...继续阅读»

Number of Presidential candidates that question Evolution’s role in the development of life on earth: Three (3).一些总统候选人这一问题演变中的作用的发展，地球上的生命： 3 （ 3 ） 。 We are now down to one, Mike Huckabee, since the other two dropped out of the "race".我们现在缩小到了一，赫卡比，因为其他两个辍学的“种族” 。

Is it fair to call someone an idiot for questioning the reality of Evolution?这是公平的要求某人白痴质疑现实的演变？ No. People can believe whatever they want to believe.第人们可以相信他们想要相信。 If Mike Huckabee wants to deny the existence of Gravity next, after warming up with Evolution, he is welcome to do so.如果赫卡比想否认存在重力明年之后，气候变暖与演变，我们都欢迎他来这样做。 But these irrational positions automatically disqualify that person from receiving my vote for pretty much any position ... Continue Reading »但是，这些不合理的职位自动取消该人收到我的投票相当任何立场...继续阅读»

Got to watch the 2004 movie "The Day after Tomorrow" over the weekend.观看了2004年的电影“后天”的周末。 It’sa good movie, even  though basic science gets grossly abused in the process of creating the required gripping story line.这是部好电影，即使基础科学得到粗暴虐待的过程中，创造必要的引人入胜的故事线。 Nonetheless, it’s interesting to look at how far we’ve come in our appreciation of climate change since 2004:然而，有趣的看多远我们走过的，我们赞赏气候变化自2004年以来：

• The polar ice caps are melting away ... Continue Reading »在极地冰盖融化了 ...继续阅读»