Bookmarks for May 4th through May 14th

These are my links for May 4th through May 14th:

  • [1005.1320] The myth of equidistribution for high-dimensional simulation – A pseudo-random number generator (RNG) might be used to generate w-bit random samples in d dimensions if the number of state bits is at least dw. Some RNGs perform better than others and the concept of equidistribution has been introduced in the literature in order to rank different RNGs. We define what it means for a RNG to be (d,w)-equidistributed, and then argue that (d,w)-equidistribution is not necessarily a desirable property.
  • [1005.1327] Statistical Model Checking : An Overview – Quantitative properties of stochastic systems are usually specified in logics that allow one to compare the measure of executions satisfying certain temporal properties with thresholds. The model checking problem for stochastic systems with respect to such logics is typically solved by a numerical approach that iteratively computes (or approximates) the exact measure of paths satisfying relevant subformulas; the algorithms themselves depend on the class of systems being analyzed as well as the logic used for specifying the properties. Another approach to solve the model checking problem is to \emph{simulate} the system for finitely many runs, and use \emph{hypothesis testing} to infer whether the samples provide a \emph{statistical} evidence for the satisfaction or violation of the specification. In this short paper, we survey the statistical approach, and outline its main advantages in terms of efficiency, uniformity, and simplicity.
  • Untangling the Quantum Entanglement Behind Photosynthesis: Berkeley scientists shine new light on green plant secrets « Berkeley Lab News Center – The future of clean green solar power may well hinge on scientists being able to unravel the mysteries of photosynthesis, the process by which green plants convert sunlight into electrochemical energy. To this end, researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC), Berkeley have recorded the first observation and characterization of a critical physical phenomenon behind photosynthesis known as quantum entanglement.

Bookmarks for March 23rd through April 12th

These are my links for March 23rd through April 12th:

  • Earliest Known Uses of Some of the Words of Mathematics – These pages attempt to show the first uses of various words used in mathematics. Research for these pages is ongoing, and a citation should not be assumed to be the earliest use unless it is indicated as such.
  • The Illustrated Road to Serfdom – by Friedrich A. Hayek
  • cp42252001.pdf (application/pdf Object) – This article discusses the concept of information and its intimate relationship with physics. After an introduction of all the necessary quantum mechanical and information theoretical concepts we analyse Landauer’ s principle which states that the erasure of information is inevitably accompanied by the generation of heat. We employ this principle to rederive a number of results in classical and quantum information theory whose rigorous mathematical derivations are difficult. This demonstrates the usefulness of Landauer’ s principle and provides an introduction to the physical theory of information.
  • Data Marketplace : Find, buy and sell data online – Data Marketplace makes it easy for people to find, buy and sell data online.<br />
    <br />
    Most data must be aggregated, cleaned, and analyzed to extract useful information. It doesn’t make sense that the same person should do all of these things. Data Marketplace connects people who need data with people who are good at collecting, cleaning, and analyzing it.<br />
    <br />
    People request data that they need. Providers upload data to Data Marketplace, provide descriptive metadata, and set a price. Stored metadata is used to help consumers find relevant data through traditional search engines and when browsing the marketplace.

Bookmarks for February 12th through February 16th

These are my links for February 12th through February 16th:

  • Metric Conversion. Unit Conversion. Online Measurement Unit Converter. Conversion Table. – If you are need any kind of conversion you are at the right place. We offer wide range of online conversions between different units of measurement. Here you make time, data, speed, temperature, currency and a lot of other conversions. Please start by choosing the conversion type.
  • Algorithmic Thermodynamics.pdf (application/pdf Object) – …one of the fun things we noticed is that algorithmic entropy is a special case of Gibbs entropy — but only if we generalize a bit and use relative entropy. They say “everything is relative”. I don’t know if that’s true, but it’s sure true for entropy.
  • r4stats.com: R info for SAS, SPSS, and Stata Users – R has over 3,000 add-on packages, many containing multiple procedures, so it can do most of the things that SAS and SPSS can do and quite a bit more. The table below focuses only on SAS and SPSS products and which of them have counterparts in R. As a result, some categories are extremely broad (e.g. regression) while others are quite narrow (e.g. conjoint analysis). This table does not contain the hundreds of R packages that have no counterparts in the form of SAS or SPSS products. There are many important topics (e.g. mixed models, survival analysis) offered by all three that are not listed because neither SAS Institute nor IBM’s SPSS Company sell a product focused just on that.
  • flattr – We aim to revolutionize how people pay and get paid for content on the internet. Come, join and show the world that good content is worth some coins out of your pocket.

Bookmarks for December 14th from 10:28 to 10:34

These are my links for December 14th from 10:28 to 10:34:

  • [quant-ph/0204088] The Wave Function: It or Bit? – Schroedinger's wave function shows many aspects of a state of incomplete knowledge or information ("bit"): (1) it is usually defined on a space of classical configurations, (2) its generic entanglement is, therefore, analogous to statistical correlations, and (3) it determines probabilities of measurement outcomes. Nonetheless, quantum superpositions (such as represented by a wave function) define individual physical states ("it"). This conceptual dilemma may have its origin in the conventional operational foundation of physical concepts, successful in classical physics, but inappropriate in quantum theory because of the existence of mutually exclusive operations (used for the definition of concepts). In contrast, a hypothetical realism, based on concepts that are justified only by their universal and consistent applicability, favors the wave function as a description of (thus nonlocal) physical reality. The (conceptually local) classical world then appears as an illusion…
  • 9 Ways to Visualize Proportions – A Guide | FlowingData – With all the visualization options out there, it can be hard to figure out what graph or chart suits your data best. This is a guide to make your decision easier for one particular type of data: proportions.
  • Computer Laboratory – Technical reports: UCAM-CL-TR-754 – The success of many attacks on computer systems can be traced back to the security engineers not understanding the psychology of the system users they meant to protect. We examine a variety of scams and “short cons” that were investigated, documented and recreated for the BBC TV programme The Real Hustle and we extract from them some general principles about the recurring behavioural patterns of victims that hustlers have learnt to exploit.

    We argue that an understanding of these inherent “human factors” vulnerabilities, and the necessity to take them into account during design rather than naïvely shifting the blame onto the “gullible users”, is a fundamental paradigm shift for the security engineer which, if adopted, will lead to stronger and more resilient systems security.

  • Memristor – Wikipedia, the free encyclopedia – On April 30, 2008 a team at HP Labs announced the development of a switching memristor. Based on a thin film of titanium dioxide, it has a regime of operation with an approximately linear charge-resistance relationship.[5][6][7] These devices are being developed for application in nanoelectronic memories, computer logic, and neuromorphic computer architectures.

Bookmarks for November 16th through December 14th

These are my links for November 16th through December 14th:

  • UC Davis Philosophy 102, Theory of Knowledge: Table of Contents for Lecture Notes – The subject of this course is what has come to be called “theory of knowledge” or “epistemology.” The two names are interchangeable in common use. (A similar pair of terms for philosophical disciplines is ‘theory of value’ (or ‘value theory’) and the little-used ‘axiology.’) Until the nineteenth century, there had been no special term to indicate the study of knowledge as such, even though knowledge had been studied from the very beginning of Western philosophy . The word “epistemology” was coined by James Ferrier in his 1856 book Institutes of Metaphysics. The root word ‘episteme’ in Greek means ‘knowledge,’ while the ‘-ology’ suffix signifies, roughly, ‘study of.’ Compare terms such as ‘biology’ (study of life), ‘geology’ (study of the earth), etc. Shortly after Ferrier, Eduard Zeller in 1862 introduced the German word ‘Erkenntnistheorie’ in Ueber Aufgabe und Bedeutung der Erkenntnistheorie. This word is translated into English as “theory of knowledge.”
  • Human or Cylon? Group testing on Battlestar Galactica (application/pdf Object) – Does statistics have a place though in the world of science fiction? Because science fiction writers try to merge the sci-fi world with the real world in a believable way, one might think that statistics could make a significant contribution to solving sci-fi problems.In the hit Sci Fi Network television show, the new Battlestar Galactica (a re-imagined version of the 1970’s show), there is an attempt to use science to solve a very important problem. Due to the excessive amount of time the proposed solution would take to complete, it is deemed impractical and never implemented. This paper shows how the problem could have been solved instead using a statistical technique called “group testing.” Scientists use this technique to solve many real-world problems, including the screening of blood donations for diseases. When applied to the problem on Battlestar Galactica, it will be shown that group testing could have a made dramatic difference to the course of the show
  • The Ninth Annual Year in Ideas – Magazine – NYTimes.com – Once again, The Times Magazine looks back on the past year from our favored perch: ideas. Like a magpie building its nest, we have hunted eclectically, though not without discrimination, for noteworthy notions of 2009 — the twigs and sticks and shiny paper scraps of human ingenuity, which, when collected and woven together, form a sort of cognitive shelter, in which the curious mind can incubate, hatch and feather. Unlike birds, we can also alphabetize. And so we hereby present, from A to Z, the most clever, important, silly and just plain weird innovations we carried back from all corners of the thinking world. To offer a nonalphabetical option for navigating the entries, this year we have attached tags to each item indicating subject matter.
  • [quant-ph/0204088] The Wave Function: It or Bit? – Schroedinger’s wave function shows many aspects of a state of incomplete knowledge or information (“bit”): (1) it is usually defined on a space of classical configurations, (2) its generic entanglement is, therefore, analogous to statistical correlations, and (3) it determines probabilities of measurement outcomes. Nonetheless, quantum superpositions (such as represented by a wave function) define individual physical states (“it”). This conceptual dilemma may have its origin in the conventional operational foundation of physical concepts, successful in classical physics, but inappropriate in quantum theory because of the existence of mutually exclusive operations (used for the definition of concepts). In contrast, a hypothetical realism, based on concepts that are justified only by their universal and consistent applicability, favors the wave function as a description of (thus nonlocal) physical reality. The (conceptually local) classical world then appears as an illusion…
  • Computer Laboratory – Technical reports: UCAM-CL-TR-754 – The success of many attacks on computer systems can be traced back to the security engineers not understanding the psychology of the system users they meant to protect. We examine a variety of scams and “short cons” that were investigated, documented and recreated for the BBC TV programme The Real Hustle and we extract from them some general principles about the recurring behavioural patterns of victims that hustlers have learnt to exploit.We argue that an understanding of these inherent “human factors” vulnerabilities, and the necessity to take them into account during design rather than naïvely shifting the blame onto the “gullible users”, is a fundamental paradigm shift for the security engineer which, if adopted, will lead to stronger and more resilient systems security.
  • Memristor – Wikipedia, the free encyclopedia – On April 30, 2008 a team at HP Labs announced the development of a switching memristor. Based on a thin film of titanium dioxide, it has a regime of operation with an approximately linear charge-resistance relationship.[5][6][7] These devices are being developed for application in nanoelectronic memories, computer logic, and neuromorphic computer architectures.
  • December 2009: Christopher Hitchens on Stieg Larsson | vanityfair.com – Just when Stieg Larsson was about to make his fortune with the mega-selling thriller The Girl with the Dragon Tattoo, the crusading journalist dropped dead. Now some are asking how much of his fiction–which exposes Sweden’s dark currents of Fascism and sexual predation–is fact.