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  All Sites - 2065 items found, showing 401 to 450

  1. Decision Making Information - Model Education Systems Associates: MESA, Inc.
    MESA specializes in the development, implementation and use of decision support systems and related quantitative information resources, especially quantitative tools for research, evaluation and policy analysis directed toward children and their living ...more>>

  2. Decision Tree for Optimization Software - Hans D. Mittelmann, P. Spellucci
    Information on optimization software and optimization research, including links to a dictionary, tutorials, testcases, interfaces, and software. ...more>>

  3. Deep in the Jungles - Ivars Peterson (MathTrek)
    Humans are predisposed to seeing order and meaning in a world that too often presents random choices and chaotic evidence. Random events sometimes get linked into a meaningful, though ultimately bogus, scenario... At the same time, the mathematics of ...more>>

  4. Defending the Roman Empire - Ivars Peterson (MathTrek)
    Questions of military strategy can be handled mathematically. Charles S. ReVelle of Johns Hopkins University in Baltimore and Kenneth E. Rosing, recently retired from Erasmus University Rotterdam, describe their approach in the August-September American ...more>>

  5. The Definitive Four Fours Answer Key - David A. Wheeler
    From 0 up to 40,000, whole number mathematical expressions that use only common mathematical symbols and exactly four 4s. Wheeler offers his solutions in three different formats: an abbreviated list of answers; a text file of results, mathematical expressions, ...more>>

  6. Deliberative Discourse Idealized and Realized: Accountable Talk in the Classroom and in Civic Life - Sarah Michaels, Catherine O’Connor, Lauren B. Resnick
    An article in PDF format. Abstract: Classroom discussion practices that can lead to reasoned participation by all students are presented and described by the authors. Their research emphasizes the careful orchestration of talk and tasks in academic learning. ...more>>

  7. Dennis Stanton
    Dennis Stanton is a professor at the University of Minnesota studying combinatorics and hypergeometric functions. Many of his papers are available online in PostScript and PDF formats. There are also exams and solutions from previous classes, and a complete ...more>>

  8. Density Functional Theory in Hydrodynamics
    Density functional theory in hydrodynamics of a multicomponent multiphase mixture. Density functional theory describes the multicomponent multiphase mixture continuously without density jumps and interfacial surfaces. Bulletin /Field of Application/ ...more>>

  9. Department of Mathematics and Computer Science - North Carolina School of Science and Mathematics (NCSSM)
    Learning materials for teachers and students include resources on algebra, advanced functions, and mathematical modeling; data sets used with the NCSSM textbook Contemporary Precalculus Through Applications; the AP Calculus Web Center; and Mathematics ...more>>

  10. Department of Science & Mathematics Education: Research and Development - Univ. of Melbourne, Australia
    Read faculty research and learn about their projects and interests: children's understanding of statistical and probabilistic concepts; the negotiation of meaning in mathematics & science classrooms (The Classroom Project); the expression of algorithms ...more>>

  11. Dept. of Statistics - University of Illinois at Urbana-Champaign
    Web pages generated by statistics courses; biographical sketches of faculty, staff, lab members, and graduate students; department newsletter. Graduate program admission requirements, degrees offered, courses, statistical consulting services, and The ...more>>

  12. Derivatives Page - Financial Pipeline
    Derivatives are financial securities whose value is derived from another "underlying" financial security. Options, futures, swaps, swaptions, and structured notes are all examples of derivative securities. Derivatives can be used in hedging, protecting ...more>>

  13. Design, Analysis, Implementation, and Evaluation of Graph Drawing Algorithms - Petra Mutzel
    Automatic Graph Drawing is a relatively new field in Computer Science. The task is to draw diagrams of objects and their relations in such a way that they are easy to read and understand. Applications are, e.g., animation of algorithms, data and flow ...more>>

  14. Design Ideas - Julie Coghill
    A series of articles that discuss quilt design using proportion, asymmetry, and Pythagorean triples. ...more>>

  15. Designing a Sustainable Standards-based Assessment System - Don Burger; Mid-continent Regional Educational Laboratory (McREL)
    Designing and implementing a sustainable standards-based system that consistently yields high student achievement involves more than setting and measuring academic goals. Changing to a standards-based system provides an opportunity to re-examine the ...more>>

  16. Designing Effective Professional Development: Lessons from the Eisenhower Program - U.S. Department of Education
    The second report of the National Evaluation of the Eisenhower Professional Development Program, Part B (State and Local Activities), a multi-year evaluation being conducted by the American Institutes for Research (AIR) under a contract with the U.S. ...more>>

  17. Determinación Geométrica de los Números Primos y Perfectos - Omar E. Pol
    Un breve ensayo en que "se describe la geometría que determina la distribución exacta de los números primos y también de los números perfectos. Se ilustra el texto con diagramas originales; se muestra el modelo principal ...more>>

  18. Detracking America's Schools: The Reform Without Cost? - Brewer, Rees, Argys; Phi Delta Kappan
    The practice of grouping school students by level of ability, known as tracking, has long been used in American public schools. In recent years, opponents of tracking have argued that below-average students are hindered by being grouped together, while ...more>>

  19. Developing Algebraic Thinking - Suzanne Alejandre
    Teacher lesson plan and student kinesthetic activities on the Traffic Jam activity and applet, as originally published in the inaugural (Fall, 2002) issue of ON-Math, an electronic journal of the National Council of Teachers of Mathematics (NCTM). ...more>>

  20. The Development of Group Theory - MacTutor Math History Archives
    Linked essay describing the rise and progress of group theory from the 18th through the 19th centuries, with references (books/articles). ...more>>

  21. Dice and Valentine's Day Symmetries (Math Chat) - Frank Morgan; Christian Science Monitor
    A dice challenge from S. H. Logue: The six faces of four dice have these numbers on them: A 1 1 5 5 5 5 B 4 4 4 4 4 4 C 3 3 3 3 7 7 D 2 2 2 6 6 6. You and your opponent each choose one die to use throughout the game. Each round you both roll, and the ...more>>

  22. Dien dàn Toán hoc.net
    A math site in Vietnamese. ...more>>

  23. Difference and Functional Equations - Dave Rusin; The Mathematical Atlas
    A short article designed to provide an introduction to functional equations, those in which a function is sought which is to satisfy certain relations among its values at all points. For example, we may look for functions satisfying f(x*y)=f(x)+f(y) and ...more>>

  24. Differential Geometry - Dave Rusin; The Mathematical Atlas
    A short article designed to provide an introduction to differential geometry, the language of modern physics and an area of mathematical delight. Typically, one considers sets which are manifolds (that is, locally resemble Euclidean space) and which come ...more>>

  25. Different Ways to Represent Numbers - Chad Lake
    Online paper that discusses and illustrates counting in bases other than 10; converting to decimal; the Snake Algorithm (the algorithm, summary of binary-to-decimal Snake Algorithm, decimal-to-binary Snake, extending the Snake to other bases, and summary ...more>>

  26. Digital Manipulatives: New Toys to Think With - Resnick, Martin, Berg, Borovoy, Colella, Kramer, Silverman; MIT Media Laboratory
    Manipulative materials such as Cuisenaire Rods and Pattern Blocks enable children to explore mathematical and scientific concepts such as number and shape through direct manipulation of physical objects. Resnick et al. have developed a new generation ...more>>

  27. Digital Mathematical Performance - Gadanidis, George; Borba, Marcelo; Hughes, Janette; et al.
    Watch video, live-acted dramatic storyboards, and animations of how people "perform" mathematics: Flatland, "Help Me, Fermi," Should Parallel Lines Never Meet," "The Pleasure of Making 10" (linear equations), "The Waiter" (the missing dollar problem), ...more>>

  28. Digits, Squares, and Cycles - Ivars Peterson (MathTrek)
    Fascinating patterns lurk among the digits of whole numbers. Pick a positive integer, such as 57. Square each of the digits, then add the squares together: 5^2 + 7^2 = 25 + 49 = 74. Do the same thing with the digits of 74: 7^2 + 4^2 = 49 + 16 = 65. Keep ...more>>

  29. Diophantine geometry in characteristic p: a survey - José Felipe Voloch
    An article that appeared in Arithmetic Geometry, F. Catanese, ed., Symposia Mathematica XXXVII, Cambridge Univ. Press, 1997, pp. 260-278. Introduction; Curves; Abelian varieties and their subvarieties; Diophantine Approximation in characteristic p; Omitted ...more>>

  30. Dipping math scores heat up debate over math teaching... - Bridget Murray, American Psychological Association (APA) Monitor
    ... psychologists differ over the merits of teaching children 'whole math'. An APA newsletter article that outlines the debate over the effectiveness of whole math, a demonstrative approach where manipulatives help children understand math concepts. "Some ...more>>

  31. Discoveries & Breakthroughs Inside Mathematics - American Mathematical Society (AMS)
    Read articles and watch video news segments about the latest discoveries and applications of mathematics: "Do the Math Dance," "Mathematician Calms the Skies with Turbulence Detection Algorithm," "Become a Smarter Shopper," "The Science Behind Movie Magic," ...more>>

  32. Discovering Geometry Newsletter - Key Curriculum Press
    A free biannual publication providing information and teaching techniques for The Geometer's Sketchpad software package, the Discovering Geometry Newsletter is a resource for those interested in geometry and technology education. Download PDFs of past ...more>>

  33. Discover Magazine - The Walt Disney Company
    The monthly magazine of science and technology. Covers space, biology, health, medicine, AIDS, computers, new technology, the environment, astronomy, ancient life, archeology, evolution, physics, mathematics, ecology, and more. Available online: selected ...more>>

  34. Discrete Fourier Series Transform - Eric Brasseur
    A brief introduction to the discrete Fourier transform and its application to signal sampling. Also available in French. ...more>>

  35. Discussiones Mathematicae - Borowiecki; Technical University of Zielona Góra, Poland
    Four journals: Differential Inclusions, Control and Optimization; General Algebra and Applications; Graph Theory; and Probability and Statistics. Information for each journal includes a general description, subscription information, list of editors, ...more>>

  36. Disorder in the Deck - Ivars Peterson (MathTrek)
    About 30 years ago, tournament bridge players started using computer-shuffled rather than hand-shuffled decks. Almost immediately, there was an outcry protesting the apparently wild fluctuations in the distribution of cards of different suits in computer-dealt ...more>>

  37. Distributed Maple - Wolfgang Schreiner; RISC-Linz, Johannes Kepler Universität Linz
    A system for writing parallel programs in the computer algebra system Maple, so that different computers in a network can perform parts of the same computation. The program may be downloaded here in .tar or .zip form. The manual, a README file, and papers ...more>>

  38. Divide and conquer for quantum computers - Ivars Peterson - Science News Online
    In theory, quantum computations can be speeded up significantly by letting many quantum computers work together in parallel on data encoded as particles in an entangled quantum state. ...more>>

  39. Dividing The Plane - Jim Loy
    A line divides the plane into two pieces (regions). Draw another line. The plane is now divided into three or four regions. It is three regions if the lines are parallel, four if they intersect. A third line divides the plane into seven regions. Find ...more>>

  40. Divisibility Criteria - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A definition of some divisibility criteria, and their derivation from modulo arithmetic, with links to related pages. ...more>>

  41. Division by Three [PDF] - John Conway, Peter Doyle
    A formal proof that it is possible to divide by three. This assertion is easy to prove using the axiom of choice, but becomes a much more difficult problem if the axiom of choice is not allowed (as is the case here). From this proof, and the much simpler ...more>>

  42. Division with Roman Numerals - Jim Loy
    Roman numeral division can be very easy or fairly difficult, depending on the two numbers. An example of division by pieces, and a general method using repeated subtraction. ...more>>

  43. D. J. Bernstein
    Courses, research articles (in dvi format), and a list of available software, listed by a professor of mathematics and computer science at the University of Illinois. Pages are also listed by topic. Also at ftp://koobera.math.uic.edu/www/djb.html. ...more>>

  44. Dmitry Gokhman
    Papers (Hardy fields; Differential fields of complex germs; Applied mathematics), Class lecture notes and summaries, code (IGF, LibPS 2, Python, Perl, TeXtool 2.12a), courses, translations, guests. ...more>>

  45. DNA Adds Up - Ivars Peterson (MathLand)
    Calculating that 0 + 0 = 0, 1 + 0 = 1, and 0 + 1 = 1 is normally no big deal. When the calculations are done in the lab using DNA molecules, however, these elementary manipulations look considerably more interesting. In the July 12 [1996] Science, a team ...more>>

  46. DNA, Computers, and Killer Apps - Ivars Peterson (MathLand)
    When computer scientists look at DNA, they see information storage and processing. They view the four bases of DNA as something akin to the zeros and ones of the binary code by which computers store and process information. They look for algorithms, theorems, ...more>>

  47. Does March Madness need a time-out? - J. Travis - Science News Online
    Suggestions about the effects of circadian rhythms, daily cycles of physiological activity that every organism experiences, and changes in time zone (causing 'jet lag'), on sports teams. ...more>>

  48. Dominique Foata
    Dominique Foata is a mathematician specializing in combinatorics. Abstracts of his papers are available online, and they may be downloaded in .dvi, PostScript, or TeX formats. The site also contains a summary and errata for the textbook Calcul des Probabilités, ...more>>

  49. Doodling and Miracles - Cut the Knot!, Alexander Bogomolny
    Almost 100 years ago, Frank Morley proved a curious theorem from elementary geometry that had remained unknown until 1899. With time, the theorem became known in mathematical folklore as Morley's Miracle (Morley's Trisector Theorem is a more mundane term.) ...more>>

  50. Doron Zeilberger's Electronic Headquarters
    Doron Zeilberger researches combinatorics using computer programs. The site is notable for his Opinions page; these opinions are wide-ranging but touch upon mathematics education, the use of computers, and the value of incomplete proofs. All of Zeilberger's ...more>>

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