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  All Sites - 10839 items found, showing 2001 to 2050

  1. Decimals and Logarithms in the Works? And a Dyer's Hand too? - Penn Leary
    Shakespeare, Decimals and Logarithms: What did Shakespeare know about mathematics, particularly logarithms and the decimal system? And when did he know it? An article partly from Leary's book, The Second Cryptographic Shakespeare. ...more>>

  2. Decision Analysis Society (DAS) - INFORMS
    DAWeb promotes the development and use of logical methods for the improvement of decision-making in public and private enterprise. Such methods include models for decision-making under conditions of uncertainty or multiple objectives; techniques of risk ...more>>

  3. Decision Development Corporation
    Software for K-12 students and teachers, for all platforms. Math software included separately and as part of other product lines. (Gigamath Playground and Junior Gigamath Playground offer word problem practice for ages 7-14 and 4-8 respectively; Ellen ...more>>

  4. Decisioneering, Inc.
    Excel-based decision analysis software tools (Crystal Ball, CB Predictor) for risk analysis and business forecasting. ...more>>

  5. 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>>

  6. Decision Sciences Institute
    An interdisciplinary, international organization dedicated to the advancement of the science and practice of education and research about business decisions. Publishes the Decision Sciences Journal. ...more>>

  7. Decision Theory and Decision Trees - Mind Tools
    A method for organizing and analyzing financial decisions, and other decisions with clear numerical payoff. ...more>>

  8. 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>>

  9. Deck-u-lator - Michael B. Moore
    For your collectible trading card games, especially Magic: the Gathering. Deck-u-lator calculates the percentage that a card combination will occur in the first cards dealt off the top of the deck. The calculator uses multivariate hypergeometric distribution. ...more>>

  10. 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>>

  11. Deepwater Horizon Incident - The National Oceanic and Atmospheric Administration (NOAA)
    NOAA has put together a site full of resources about the Deepwater Horizon oil spill in the Gulf of Mexico. In the left margin, choose "Information for: Students and Teachers" to access data sets as well as articles for the classroom, such as a Q&A that ...more>>

  12. 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>>

  13. Defining Geometric Formulas (Ask Dr. Math FAQ) - Math Forum
    Definitions of two- and three-dimensional figures in general, and a note on dimensions. ...more>>

  14. 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>>

  15. Dekov Software
    Educational software, a journal of computer-generated Euclidean geometry, and a computer-generated encyclopedia of Euclidean geometry. Current software titles include: Solving Triangles (step-by-step solutions to triangle problems in elementary geometry); ...more>>

  16. Delaware State Data Center - Delaware Economic Development Office
    A focal point for the distribution of census information in Delaware and for the dissemination of other information from the federal government, state government and other sources, coordinating the use of census and other data for economic development. ...more>>

  17. 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>>

  18. Delphi For Fun - Gary Darby; Intellitech Systems Inc.
    Delphi is based on the Pascal programming language developed in the early 1970s by Niklaus Wirth and named after mathematician Blaise Pascal. This site explores the use of programming as a tool in math problem solving, discussing interesting problems, ...more>>

  19. Delta Blocks - Hop David
    A way to model different 3-D tessellations and a tool for studying geometry, crystallography, and polyhedra. Delta blocks were inspired by M. C. Escher's print "Flatworms," which he said demonstrates that one can build a house not only with the usual ...more>>

  20. Demiregular Tessellations - Totally Tessellated
    Color renditions and a real example of a demiregular tessellation. Templates allow you to print renditions of each tessellation suitable for coloring activities. ...more>>

  21. Demography: the Java Version - Daniel Udovic, Joshua Coxwell
    Java Demography 2.0.2 simulates growth in age structured populations. The program's click and drag features allow users to directly manipulate the fertility and mortality graphs and the population's current age distribution, represented as a bar chart ...more>>

  22. De Moivre's Theorem - Math Forum, Ask Dr. Math Common Question
    A selection of answers to questions about de Moivre's theorem, including its usefulness and proofs. ...more>>

  23. The De Morgan Journal - London Mathematical Society
    The De Morgan Journal aims "to encourage academic mathematicians to reflect on current issues in mathematics education at all levels, from primary school to graduate studies; to encourage them to explore links between higher mathematics and elementary ...more>>

  24. Demos with Positive Impact - David R. Hill and Lila F. Roberts
    Demos with Positive Impact organizes effective math teaching tools. Submit your own demo, or browse the existing collection of physical demos, calculator demos, databased demos, browser-based demos, and software demos, each with statements of objectives, ...more>>

  25. Demos with Positive Impact - David R. Hill and Lila F. Roberts
    A collection of classroom demonstrations that use some form of instructional technology. The authors invite others to submit demos and provide them with feedback on the demos already collected. Demos are organized under the levels of Pre Calculus, Calculus ...more>>

  26. 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>>

  27. 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>>

  28. Departamento de Didáctica de la Matemática - Universidad de Granada
    The University of Granada's Department of Mathematics Instruction features research groups, each with bibliographies of downloadable publications and other resources, on numerical thinking (pensamiento numérico), statistics education (educación ...more>>

  29. The Department of Applied Science Wavelet Group - Lawrence Livermore National Laboratory
    The Wavelet Group is interested in studying the use of the wavelet transform in the solution of various types of problems. The primary area of current study is Signal Processing Using the Wavelet Transform Electrocardiogram (ECG). People, recent papers, ...more>>

  30. Department of Logic - Faculty of Philosophy, Moscow State University, Russia
    In English and Russian. History of the department, staff, books, papers, courses, news. ...more>>

  31. Department of Mathematical Sciences - U.S. Military Academy, West Point
    Publications include Cryptologia, CASE (Computer Algebra Systems in Education), Mathematica Militaris, and PRIMUS (Problems, Resource, and Issues in Undergraduate Mathematics Studies). MathTECH is a research project that provides Java applets and TI-89 ...more>>

  32. 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>>

  33. 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>>

  34. 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>>

  35. Derek's Daily Math - Derek Orr
    "Every Number Has a Story to Tell." This blog by an undergraduate at the University of Pittsburgh details number theoretic properties for every day of the calendar year. Orr, a physics and math major, also maintains a list of "Interesting Propositions/Theorems ...more>>

  36. Derivations of Applied Mathematics - Thaddeus H. Black
    An open-source book on the essential ideas underlying the derivations of a large number of mathematical results useful in the modeling of physical systems. PDF, with LaTeX source available under the GNU General Public License. ...more>>

  37. Derivative and Integral - Bill Finzer, Key Curriculum Press
    Two sketches demonstrating elementary calculus concepts. Each sketch shows the graph of a function and the graph of its derivative. One sketch lets you change the graph of the function and watch the effect on its derivative. The other sketch lets you ...more>>

  38. Derivative Calculator - David Scherfgen
    Compute derivatives of functions online, for free. Supporting symbolic computation of the 1st, 2nd, and subsequent derivatives of multivariable functions, the Derivative Calculator dynamically typesets expressions while you type them. derivative-calculator.net ...more>>

  39. Derivative - Math Forum, Ask Dr. Math Common Question
    A selection of answers to questions about derivatives, from definitions and explanations to alternate forms of the derivative formula. ...more>>

  40. The Derivative Project: Using Appropriate Technology to Teach the Concept of Derivative Via a Graphical Approach - Lisa Denise Murphy
    Murphy has developed an instructional unit that uses a motion sensor and related software to introduce the concept of a derivative, and tested it in a first-semester calculus class, with very good results. She is now engaged in expanding this project ...more>>

  41. 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>>

  42. Derive - Texas Instruments, Inc.
    DERIVE software is a Computer Algebra System (CAS) for personal computers (Windows, DOS). In addition, the CAS technology in DERIVE is incorporated in TI-89 and TI-92 calculators. Derive applies the rules of algebra, trigonometry, calculus, and matrix ...more>>

  43. Desafios Matemáticos - Paulo Ferro
    Cinco desafios novos cada mês. Ferro, um professor de matemática licenciado pela Universidade de Coimbra, tambem oferece demonstracões de geometria dinâmica, jogos matemáticos, biografias de matemáticos, exames ...more>>

  44. Descartes 3 - Ministry of Education, Culture, and Sport, Spain
    Create interactive math lessons in web page format with this applet, or download any of more than 60 already created applets (ranging from "representing numbers on a straight line" to "tables and algebraic terms," from "geometry and a game of billiards" ...more>>

  45. Descartes' Formula (Geometry and the Imagination) - Conway, Doyle, Gilman, Thurston; The Geometry Center
    The angle defect at a vertex of a polygon was defined to be the amount by which the sum of the angles at the corners of the faces at that vertex falls short of and the total angle defect of the polyhedron was defined to be what one got when one added ...more>>

  46. Descartes' Rule of Signs - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A discussion by Scott Brodie of the basis of the attribution to Descartes of the proposition now known as Descartes' Rule of Signs: The number of positive roots of a polynomial with real coefficients is equal to the number of "changes of sign" in the ...more>>

  47. Description of the Julia sets of the Cauliflower fractal - Frans Faase
    Investigation of the Julia sets of the Cauliflower fractal, which is a fractal generated by two linear translations with three parameters. The generated fractal can either be solid, connected, or disconnected. The author shows that two Julia sets consisting ...more>>

  48. Descriptive Geometry - Petr Plavjaník
    Software for creating and printing drawings, including conic sections, color fillings in Monge's projection, and axonometry. In English and Czech. ...more>>

  49. 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>>

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

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