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Scaling and Critical Phenomena In Nature 尺度与自然中的临界现象
Pub Date : 2003-09-01 DOI: 10.1109/MCISE.2003.1225866
J. Rundle
Self-organized criticality in earth systems reviews recent research that applies a variety of statistical and statistical mechanical techniques to current problems of interest in the earth sciences. The topics it covers are similar in many respects to Donald L. Turcotte's now-classic work fractals and chaos in geology and geophysics (first published by Cambridge university press, 1992), and more recently updated (Cambridge university press, 1997).
地球系统中的自组织临界性回顾了最近应用各种统计和统计力学技术来解决当前地球科学中感兴趣的问题的研究。它涵盖的主题在许多方面与唐纳德·l·特科特(Donald L. Turcotte)现在的经典著作《地质学和地球物理学中的分形和混沌》(由剑桥大学出版社首次出版,1992年)相似,最近更新(剑桥大学出版社,1997年)。
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引用次数: 1
From the Editors: Reproduced and Reproducible Results 来自编辑:可复制和可重复的结果
Pub Date : 2003-09-01 DOI: 10.1109/MCSE.2003.10005
F. Sullivan
The punchline of this message is that computation changes everything, high-speed computation changes everything quickly, and lots of people doing lots of high-speed computation changes everything a lot.
这条信息的要点是计算改变了一切,高速计算很快改变了一切,很多人做很多高速计算,一切都改变了很多。
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引用次数: 0
Computational Science: We'll Know It When We See It 计算科学:当我们看到它时,我们就会知道它
Pub Date : 2003-07-01 DOI: 10.1109/MCSE.2003.10004
F. Sullivan
the ones I took as an undergraduate a few decades ago. (Digression: it’s time to start computing dates in “Jack Benny time units.” In such units, my courses were a few months ago.) Several things about these courses struck me as worthy of note. At first glance, some of the topics in the chemistry courses looked to me like the ones I’d had in physics courses. But I checked my old textbooks and found that I was wrong. The basic notions of quantum theory and statistical mechanics have been part of the undergraduate chemistry curriculum for a long time. Once I’d started rummaging through old texts, it was hard to stop. That’s why it’s important not to look at anything when trying to clear out old files and papers. If you look at it, it becomes a treasure. Anyhow, I began to notice other things about my old textbooks. Modern books are bigger—much bigger—than older ones. Observation of many bright summer interns tells me that this is not because students used to be smarter. I suspect that current technology creates the opportunity for including lots of fancy and informative graphics at moderate cost. There’s also the fear of leaving out something important. To see this at work, just try plotting the number of pages of some well-known text as a function of number of new editions of that text. A more important change is that lots of topics that were once considered “advanced” have migrated into “elementary” texts. While I believe that we really do learn everything important when we’re very, very young, I doubt that this is the reason for the change. As time goes on, and new subjects are understood better, they simply seem to become more, well, simple. The most important thing I noticed is that, in some sense at least, chemistry really has become physics, and so have some branches of biology. To put it more accurately, subjects that used to be thought of as separate and distinct are merging. And the place where they meet is in computation. All three subjects—physics, chemistry, and biology—are now deeply dependent on computation as their principal research tool, as are many other research subjects. The theme articles in this issue of CiSE contain several very good illustrations of this fact for the case of computational chemistry. Other theme issues have given other illustrations. Computational science has become the universal language of all other sciences. But what is computational science itself? Naturally, I can’t answer this question. However, thinking about it and trying to formulate at least part of the answer is a good task for everyone in the field. In my opinion, the definition of computational science is tied up with the description of how to train someone to be a computational scientist. If we know what constitutes education in a subject, we must have at least some idea of what the subject is. Many universities are now starting programs in computational science. CiSE will certainly be one forum for discussion of these programs, and some of the
就是几十年前我读本科时修的那些。(题外话:是时候开始用“杰克·本尼时间单位”计算日期了。在这样的单位,我的课程是几个月前。)这些课程中有几件事让我觉得值得注意。乍一看,我觉得化学课上的一些话题和我在物理课上学过的很像。但是我检查了我的旧课本,发现我错了。长期以来,量子理论和统计力学的基本概念一直是本科化学课程的一部分。一旦我开始翻找旧短信,就很难停下来。这就是为什么在清理旧文件和文件时不要看任何东西是很重要的。如果你看着它,它就变成了一笔财富。总之,我开始注意到我的旧课本的其他方面。现代的书比旧书大得多。对许多聪明的暑期实习生的观察告诉我,这并不是因为过去的学生更聪明。我怀疑当前的技术创造了以中等成本包含大量花哨且信息丰富的图形的机会。还有人担心遗漏了一些重要的东西。要了解这一点,只需尝试将一些知名文本的页数绘制为该文本新版本数量的函数。一个更重要的变化是,许多曾经被认为是“高级”的主题已经迁移到“初级”文本中。虽然我相信我们真的在很小很小的时候就学会了所有重要的东西,但我怀疑这是导致这种变化的原因。随着时间的推移,人们对新学科的理解越来越好,它们似乎变得越来越简单。我注意到的最重要的事情是,至少在某种意义上,化学真的变成了物理学,生物学的一些分支也是如此。更准确地说,过去被认为是独立和不同的学科正在融合。它们在计算领域相遇。所有这三门学科——物理、化学和生物学——现在都深深地依赖于计算作为它们的主要研究工具,就像许多其他的研究学科一样。这期CiSE的主题文章包含了计算化学的几个很好的例子。其他主题问题也给出了其他插图。计算科学已经成为所有其他科学的通用语言。但是计算科学本身是什么呢?当然,我不能回答这个问题。然而,对这个领域的每个人来说,思考这个问题并试图形成至少部分答案是一项很好的任务。在我看来,计算科学的定义是与如何训练某人成为计算科学家的描述联系在一起的。如果我们知道什么构成了一门学科的教育,我们就必须至少对这门学科是什么有一些概念。许多大学现在都开设了计算科学课程。CiSE肯定会成为讨论这些程序的一个论坛,杂志中出现的一些常规专栏应该作为培训计算科学家的材料范例。也许CiSE应该挂一块牌子,上面写着:“计算科学(和工程!)R’Us!”计算科学:当我们看到它时,我们就会知道它
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引用次数: 1
The universal virus database ICTVdB 通用病毒数据库ICTVdB
Pub Date : 2003-05-01 DOI: 10.1109/MCISE.2003.1196303
C. Buchen-Osmond
The International Committee on Taxonomy of Viruses database is a universally available taxonomic research tool for understanding relationships among all viruses. ICTVdB's fundamental goals are to provide researchers with precise virus identification and to link the agreed taxonomy to sequence databases.
国际病毒分类委员会数据库是一个普遍可用的分类研究工具,用于了解所有病毒之间的关系。ICTVdB的基本目标是为研究人员提供精确的病毒鉴定,并将商定的分类与序列数据库联系起来。
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引用次数: 54
How Right You Are 你是多么正确
Pub Date : 2003-05-01 DOI: 10.1109/MCSE.2003.10003
F. Sullivan
Do you believe in your software's output? How much do you trust it? These questions force us to think about computation in a different and important way. In fact, understanding how much to trust the results is as important as the results themselves. Here are four different "degrees of belief" that i might have for results of my own computations, depending on the purpose and kind of calculation.
你相信你的软件的输出吗?你有多相信它?这些问题迫使我们以一种不同的、重要的方式来思考计算。事实上,了解在多大程度上信任结果与结果本身同样重要。根据计算的目的和类型,我对自己的计算结果可能有四种不同的“相信程度”。
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引用次数: 2
A Look at Lattice Boltzmann Equations: The Lattice Boltzmann Equation: For Fluid Dynamics and Beyond 点阵玻尔兹曼方程:点阵玻尔兹曼方程:流体力学及其他
Pub Date : 2003-03-25 DOI: 10.1109/MCISE.2003.1182967
B. Boghosian
"The Lattice Boltzmann Equation: For Fluid Dynamics and Beyond", by Sauro SucciOxford University Press, New York, 2001, ISBN: 0198503989, US$100During the past 10 years, a new class of algorithms based on the lattice Loltzmann equation (LBE) has been developed for computational fluid dynamics (CFD). These novel and fascinating algorithms were inspired by kinetic theory a branch of statistical physics. They defy the conventional wisdom of CFD in that they provide stable, fully explicit differencing schemes, with no need for elliptic solvers or upwind differencing. Yet, they are also remarkably simple. In fact, the typical reaction of long-time CFDpractitioners when encountering lattice Boltzmann algorithms for the .rst time is often something like, "that can't possibly work. It's too easy."
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引用次数: 1
From the Editors: Less Is More (Is Less) 编辑:Less Is More(少即是多)
Pub Date : 2003-03-01 DOI: 10.1109/MCSE.2003.10002
F. Sullivan
Literature in fact, all the arts are customarily in the middle of some "movement" that promises to change the whole nature of the endeavor. Recent movements include hyperrealism, symbolism, deconstructionism, existentialism, surrealism, and many other "isms." One interesting literary movement goes by the name of minimalism. In a minimalist work, sentences are short, as are paragraphs. Even minimalist books are short, with very little narrative connective tissue. Most of the story is told via dialogue, which in the best examples, tells the characters' hidden story and makes the reader care about what happens to them.
文学,事实上,所有的艺术通常都处于某种“运动”的中心,这种运动承诺改变整个努力的本质。最近的运动包括超现实主义、象征主义、解构主义、存在主义、超现实主义和许多其他“主义”。一个有趣的文学运动被称为极简主义。在极简主义作品中,句子很短,段落也很短。即使是极简主义的书也很短,几乎没有叙事结缔组织。大部分故事都是通过对话来讲述的,在最好的例子中,对话讲述了角色隐藏的故事,让读者关心他们身上发生了什么。
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引用次数: 0
Out on a LIMS (And Other Arboreal Features) 在LIMS上(和其他树木特征)
Pub Date : 2003-01-01 DOI: 10.1109/MCSE.2003.10000
D. Shirer
LIMS For several years I have been searching unsuccessfully for someone to review laboratory information management systems (LIMS) for this column. After looking into the subject myself, I can better appreciate why. The topic is so important and complex that books could be written about it; indeed , they have been. 1 Briefly, LIMS software helps laboratories schedule procedures , process and track samples and test results, collect analytical data, organize reports, and facilitate instrument checking and calibration. Modern LIMS can be enormous and almost impossible to review without a specific application in mind. Luckily, my correspondents tell me that a wealth of information is already available to prospective users. Instead of reviewing a particular vendor's offering as usual, I thus offer you a brief guide to more information on these essential systems. Originally developed in-house by individual analytical laboratories, customized solutions were eventually supplanted by commercial LIMS products developed by commercial instrument makers—primarily to get users for their own analytical tools. These systems often ran on minicom-puter controllers or mainframes, but general-purpose systems that ran on networked desktops and handheld entry stations that could be tailored to the needs of many users eventually became available. Two short summaries of LIMS development can be found online: Alan McLelland's " LIMS—Laboratory Toy or a Critical IT Component? " (Management System " (www.umsl.edu/~sauter/analysis/ LIMS_example.html). Modern LIMS products are extensive systems with linked databases that let researchers standardize data reporting methods and automatically collect data from instruments such as spectrometers and cromatographs. They also facilitate strengthened security by maintaining data validation, certification, audit trails, quality-control analysis, and record archiving. LIMS have become essential tools for many biological and chemical laboratories and manufacturing plants, as well as the pharmaceutical and petroleum industries and anyone else who needs to analyze and process massive amounts of test data. Because setting up a new LIMS can involve considerable reorganization of a firm's procedures, you should not underestimate the time necessary for installing the system and training employees. In fact, it is probably a good idea to involve representatives from each department from the start to ensure that no unpleasant surprises result during the changeover. Several firms provide third-party analyses of your needs for a laboratory management system. You can find them with a Google search for " LIMS evaluation. " Further information on this important topic is available at www.limsource.com, which features a large collection of resources, …
几年来,我一直在寻找能够为本专栏评论实验室信息管理系统(LIMS)的人,但没有成功。在我自己研究了这个问题之后,我能更好地理解其中的原因。这个话题是如此重要和复杂,以至于可以写书来讨论它;确实如此。简而言之,LIMS软件帮助实验室安排程序,处理和跟踪样品和测试结果,收集分析数据,组织报告,并方便仪器检查和校准。现代LIMS可能是巨大的,几乎不可能在没有特定应用程序的情况下进行审查。幸运的是,我的通讯员告诉我,潜在用户已经可以获得大量的信息。因此,我不会像往常一样审查特定供应商的产品,而是为您提供有关这些基本系统的更多信息的简要指南。最初由单个分析实验室内部开发,定制解决方案最终被商业仪器制造商开发的商用LIMS产品所取代,主要是为了获得用户使用自己的分析工具。这些系统通常在小型计算机控制器或大型机上运行,但最终出现了可以根据许多用户的需要进行定制的在联网台式机和手持输入站上运行的通用系统。两个关于LIMS开发的简短总结可以在网上找到:Alan McLelland的“LIMS是实验室玩具还是关键的IT组件?”“(管理系统”(www.umsl.edu/~sauter/analysis/ LIMS_example.html)。现代LIMS产品是具有关联数据库的广泛系统,使研究人员能够标准化数据报告方法,并自动从光谱仪和色谱仪等仪器收集数据。它们还通过维护数据验证、认证、审计跟踪、质量控制分析和记录存档来促进增强的安全性。LIMS已成为许多生物和化学实验室和制造工厂,以及制药和石油工业以及任何需要分析和处理大量测试数据的人的必备工具。因为建立一个新的LIMS可能涉及到公司程序的大量重组,所以您不应该低估安装系统和培训员工所需的时间。事实上,从一开始就让每个部门的代表参与进来可能是个好主意,以确保在转换过程中不会出现令人不快的意外结果。有几家公司为你们的实验室管理系统需求提供第三方分析。您可以通过谷歌搜索“LIMS评估”找到它们。关于这一重要主题的进一步信息可在www.limsource.com上获得,该网站提供大量资源,…
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引用次数: 0
From the Editors: Frankenstein Jr. 来自编辑:小弗兰肯斯坦。
Pub Date : 2003-01-01 DOI: 10.1109/MCSE.2003.10001
F. Sullivan
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引用次数: 0
Book and Web Reviews 书籍和网络评论
Pub Date : 2002-11-15 DOI: 10.1109/MCSE.2002.10006
D. Bailey, G. Cybenko
Rarely do pundits focus on the law as a problem in America's response to terrorism. Indeed, both sides quickly claim that the law supports them, hence no change is necessary. The authors view this as too simplistic, and see legal interpretation as having real consequences on the War on Terror. They argue that the Courts should give deference to what the Executive Branch regards as the proper response to an emergency situation owing to its greater availability of information and resources to attack the problem, and the lack of information sources and skill in foreign policy that most judges possess. They argue against any stance other than deference and it is a tribute to their reasoning that they largely succeed in their efforts, with the exception of one convoluted chapter regarding coercive interrogation. How can one argue against an anti-terror policy based exclusively on the rule of law and constrained by due process? The authors do so by consulting the historical record and retrieving ideas from branches of social science. How the book justifies its views is perhaps more useful for readers than even the measures it advocates for the War on Terror. Going back to the Civil War, the authors repeatedly demonstrate that the Courts have tried to balance the security of the state against the rights of the accused. When the Taney Court tried to block Lincoln from rounding up southern sympathizers in Maryland, not only did Lincoln ignore the Court and suspend habeas corpus, but he later got the war-time Congress (free of southerners with Republicans in the majority) to legalize what he did. In short, when there is a palpable threat to the State that establishes the Courts, the Courts have tended to let the Executive Branch do what it says is necessary. The authors acknowledgehowever that this sliding scale alsomoves in the other directionwhen the palpable threat lessens, as in the cases that largely reversed the Smith Act after the Red Scare of the 1950s passed. Even duringwar time, defendants canmake a vigorous defense as in the Dilling case where Nazi sympathizers were prosecuted under the Smith Act during WWII and the defense “...objected to every act of the prosecutor and disputed every ruling of the judge...” (p. 239), and the case came to an end with the abrupt death of the exhausted judge and the dismissal of the case by the new judge. The first part of the book examines major theories of national security law and the chapters go by the titles of Panic Theory, Democratic Failure Theory, and Ratchet Theory, which by their names describe why the law reacts the way it does to national security threats. The last half of the book looks at applications of these theories to law such as Alternatives to Judicial Deference, Speech, Due Process and Political Trials, and Military Force, but the most interesting of these chapters is the one on Coercive Interrogation. However convincing the rest of the book is, the authors themselves seem to lack conviction
波斯纳的《防止突然袭击》,其中引用了9/11事件前几个月发布的一份政府报告:“事实上,在过去的25年里,我们解决了一个恐怖主义问题。我们如此成功地解决了这个问题,以至于我们已经忘记了它;这是一种享受。问题是劫机和轰炸。我们解决了这个问题……这个系统并不完美,但已经足够好了。我们基本上已经搞定了这件事。”波斯纳正确地认识到,并不是缺乏一个好的法律理论,这有助于政府政府信息季刊26 (2009)427-430
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引用次数: 0
期刊
IMPACT of Computing in Science and Engineering
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