2010年十大医学突破1.可降低艾滋病感染风险的药物:美国一组研究人员在对一个艾滋病高风险群体进行研究后发现,与服用安慰剂相比,一种名为Truvada的联合抗逆转录药能显著降低艾滋病病毒的感染。但研究人员同时表示,这种药物在预防艾滋病方面的作用还需要更多研究来证实,即使结果经得起检验,它也不能代替最好的预防方法:安全的性生活和坚持使用保险套。这是因[
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2010年十大科学发现1.最出众的长角恐龙:美国科学家在犹他州发现了15只角,而它们竟然是重达2500公斤的巨型恐龙的头顶装饰物。这种名为科斯莫角龙的恐龙生活在7600万年前,犹他大学研究人员在2007年的一次探险活动中出土了这些化石残骸,但直到今年9月才正式为其命名并进行了描述。化石不仅揭示了这种年代久远的奇异物种,而且表明从前的北美与现在并不一样。2.物质比[
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第一章朦胧不见花仙渡只把扬州做京城清朝初年,明朝才亡,百姓们心气十分底落,江南以北,许多村庄已是人丁凋零,荒芜冷落,纵是昔日繁华的江南,也是阴愁压抑着人们的心头。清顺治三年的扬州城,一场惊心动魄的故事也将在这里发生。三月的江南,细雨棉棉,屋里潮气袭人,而屋外却是寒气逼人,虽然气候还有点冷,但地上的花草却开始发芽,小草儿雨滴中露出掘[
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NoevidenceoftimebeforeBigBangLatestresearchdeflatestheideathattheUniversecyclesforeternity.EdwinCartlidgeCircularripplesinthecosmicmicrowavebackgroundhavebeenmakingwaveswiththeoreticians.NASAOurviewoftheearlyUniversemaybefullofmysteriouscircles—andeventriangles—butthatdoesn'tmeanwe'reseeingevidenceofeventsthattookplacebeforetheBigBang.Sosaysatrioofpaperstakingaimatarecentclaimthatconcentricrings...[
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美国国家地理网站评选出2010年度十大天体物理学发现,宇宙外潜伏未知“结构”新证据、银河系中心发现神秘气泡状结构以及“大爆炸”造出“液态”宇宙等重大发现榜上有名。 1.每个黑洞内都含有一个宇宙
每个黑洞内都含有一个宇宙 天文学家在2010年4月宣布,我们的宇宙就像是俄罗斯套娃的一部分,可能栖身于一个黑洞内,而这个黑洞本身又是一个更大宇宙的一[
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《不要枪毙说真相的人》1958年,《阿德莱德日报》的所有者和编辑、年轻的鲁伯特默多克(RupertMurdoch)写道:“在秘密和真相的赛跑中,真相总是会不可阻挡地获得胜利。”他的这番言论或许正是继承了他的父亲基思默多克(KeithMurdoch)的意志。基思默多克曾揭露了澳大利亚加里波第战役的残酷真相:由于英国统帅的无能,无数的澳大利亚军人在加里波第战役中作出了不必要的牺[
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4个月之前,澳大利亚新南威尔士拜伦湾附近一个叫“磁石岛”的小岛不失时机地打出房地产广告,热情地招徕购房入住者。为这个小岛带来名人效应的,是“维基解密”网站的创始人朱利安.保罗.阿桑奇。
少年骇客
虽然阿桑奇当前身处窘境,但这并不妨碍他的人气直线上升。他儿子丹尼尔.阿桑奇就坚信父亲是清白的,而且,他的工作会因为其突破性和[
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![](http://metroplexmathcircle.files.wordpress.com/2010/05/balkus-ken-and-amy-chyao-2010-05.jpg?w=270&h=303><br><br>Research aimed at increasing the depths to which therapeutic light can penetrate the body and attack cancer cells has netted UT Dallas NanoExplorer Amy Chyao the top prize at the Intel International Science and Engineering Fair in San Jose, Calif.<br><br>Chyao, a sophomore at Williams High School in Plano, Texas, won the competition’s Gordon E. Moore award. The award is accompanied by a $75,000 prize, which Chyao one day hopes to apply toward medical school.<br>In the Media<br><br>More than 1,600 high school students from 59 countries around the world competed in 19 categories. Each participant had to win at the local, regional, state and national levels to compete in the Intel competition. Chyao was grilled for 10 hours by more than 40 judges during the event.<br><br>Leading up to her stunning showings in nearly half a dozen science fairs, Chyao spent the summer between her freshman and sophomore year in the George A. Jeffrey NanoExplorer program. She conducted research under the mentorship of Dr. Kenneth Balkus, professor of chemistry. Founded by Dr. Ray Baughman, director of the Alan G. MacDiarmid NanoTech Institute, the program hosts more than 30 high school students in labs across campus each summer.<br><br>“Last June, I joined the NanoExplorer program and found I was interested in projects in the Balkus Lab,” Chyao said. “I looked into different projects and had to learn a lot about chemistry.”<br><br>Chyao created semiconducting nanoparticles that, when exposed to certain wavelengths of light, generate a highly reactive form of oxygen that proves deadly to cancer cells. Once injected, the nanoparticles could travel through the bloodstream or stay localized in tumor sites. Exposure to a targeted beam of light, like a laser, could catalyze the reaction specifically where the cancer cells are growing.<br><br>This photodynamic therapy, treating superficial skin cancers with light, is an established technique to treat skin cancers, but the particles developed by Chyao may allow targeted light therapy to penetrate even deeper into the body, creating the possibility of treating a wider variety of cancers beneath the skin.<br><br>“I’m so proud of Amy,” Balkus said. “With her discoveries, we can possibly treat cancers that were previously inaccessible. I’m delighted she’s returning to my lab this summer.”<br><br>Chyao joins a growing and impressive list of previous NanoExplorers who have published in major journals, won prestigious fellowships and placed highly in international competitions.<br><br>A new group of NanoExplorers will be joining UT Dallas in June to conduct research and possibly create discoveries like Chyao’s.<br><br>Chyao’s research, funded by the National Institutes of Health, is part of the Balkus Lab’s overall effort to develop novel photocatalysts.<br><br>“I’ll be working in the Balkus Lab again as a researcher this summer,” Chyao said. “I like it here.”<br><br>When not in the lab this summer, Chyao plans to complete Calculus II as part of an opportunity from the Office of the Provost that supports tuition and fees for a small number of students each year who have completed the mathematics courses available in public schools and community colleges. The support gives students a head start on mathematics at the university level while they finish their remaining high school coursework.<br><br>In a letter to Assistant Dean of Undergraduate Education Cathie Alexander, Chyao’s father acknowledged the variety of opportunities his daughter has had to accelerate her education at UT Dallas.<br><br>“The UT Dallas outreach programs for high school students are the best for local students like Amy,” said Mr. Tim Chyao. “Amy has benefited a great deal from programs like the Awesome Math summer camp, the Metroplex Math Circle, and especially the NanoExplorers. We could not imagine all her achievements without the help from UT Dallas.”)
NanoExplorerWinsTopPrizeinIntelScienceFair
HighSchoolStudent’sWorkatUTDallasHoldsPromiseforCancerResearch,AmyChyao’samazingaccomplishmentintheIntelSciencefairforherworkatUTDallas.
ResearchaimedatincreasingthedepthstowhichtherapeuticlightcanpenetratethebodyandattackcancercellshasnettedUTDallasNanoExplorerAmyChyaothetopprizeattheIntelInternationalScienceandEngineeringFairinSanJose,Ca...[
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●宇宙看起来似乎正在加速膨胀,表明宇宙中存在一种奇怪的未知能量形式——暗能量。问题在于,没有人知道暗能量到底是什么。
●宇宙学家或许根本不需要求助于什么暗能量。如果我们居住在一个物质密度低于宇宙平均水平的空间区域,宇宙膨胀的速率就会随位置的不同而发生变化,这就有可能被误认为是膨胀速率在随时间流逝而加速。
●在大多数宇宙学家看来,[
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最近央行的一系列动作,是在美、日等发达国家央行刚刚宣布实施第二轮定量宽松货币政策后采取的相反行动,就显得很不寻常,因为这预示着宽松的刺激性宏观政策开始退出,这就反映出中国宏观调控当局对目前与未来国际、国内的经济走势判断,如果不是乐观,至少也是积极的。然而,这样的对于宏观经济大趋势的判断是正确的吗?我们先来看看对国际经济有巨大影响的美[
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