| Tessellations_Using_Geometer\'s_Sketchpad Description of a class project. |
| Tessellations_with_Java Examples and source code. |
| Tiling_Plain_and_Fancy Tiling from the mathematical and historical viewpoint by Steve Edwards. Provides a number of examples of various types of tiles that tile the plane and includes periodic tiling plus Penrose's aperiod |
| Tilings_and_Geometric_Ornament Applying principles of computer graphics to the creation of geometric ornament, as a continuation of the tradition of ornamental design using modern tools and algorithms. |
| Totally_Tessellated An introduction to tessellations explaining the basic underlying mathematics, and with many examples from real life. |
| 17_Wall_Paper_Symmetry_Groups_to_Create_a_Regular_Division_of_the_Plane Graphics. |
| Wallpaper_Groups Images and descriptions of the 17 plane symmetry groups. |
| William\'s_Geometric_Construction_Page Activities to create patterns using simple resources, such as making equilateral triangle from a circle. Suitable for upper primary and lower secondary ages. |
| AEAweb Information for economists provided by the American Economic Association. Includes electronic editions of the American Economic Review, the Journal of Economic Literature and the Journal of Economic |
| ArgMax Economics news, economists' web sites, data and link collection. |
| Council_of_Economic_Advisers A three member council that analyzes and interprets economic developments and advises the President of the United States on national economic policy. Publishes Economic Report of the President, Monthl |
| CyberEconomics Online tutorials covering both microeconomics and macroeconomics. |
| David_Smith\'s_EconomicsUK The website of David Smith, Economics Editor of The Sunday Times. Containing among other items, an article archive, research section, UK policy watch, and a Q&A forum. |
| Dismal_Scientist,_The_-_Economy_com Provides economic analysis, financial outlook, and global data. |
| Econoday Economic calendar covering events such as US Treasury announcements, economic indicators and international banking holidays |
| Economical_Links A search engine for working papers in economics plus links to sites related to economics and finance. |
| Economics_at_About_com Offers feature articles, links, and glossary. |
| Economics_Departments,_Institutes_and_Research_Centers_in_the_World_(EDIRC) Listing maintained by Christian Zimmermann of the University of Connecticut |
| Economics_in_the_news Provides links to hundreds of articles appearing in the popular press and relating economics to everyday life. |
| Economics,_Money,_and_Fun Links to Economics Lecture Notes, GAUSS,MATLAB Codes, Data, Economics journals, Economists, Economics Textbooks, Education, Stock Market Information and Investors Groups |
| Economist_Jokes Jokes about economists and economics. |
| Economy_com Web portal for news, data, and analysis on the world's economies, industry status, and related topics. Includes online databases of economic and financial time series, The Dismal Scientist economics p |
| IDEAS A central index of economics working papers. |
| The_International_Finance_Corporation IFC is a member of the World Bank Group. It finances and provides advice for private sector ventures and projects in developing countries in partnership with private investors and, through its advisor |
| JEL_Classifications Journal of Economic Literature Classification System |
| Job_Openings_for_Economists_(JOE) Published every month except January and July. The online version is generally available on the 5th of the month. Provided by the American Economic Association. Listings are alphabetical and by inst |
| Library_of_Economics_and_Liberty Provides concise encyclopedia, classic texts, articles, and data links by topic. |
| Links_to_News_Articles Provides a listing of articles from the popular press with questions relevant to the study of introductory economics and listing of relevant themes from popular textbooks. |
| McMaster_University_Archive_for_the_History_of_Economic_Thought An attempt to collect in one place a large number of significant texts in the history of economic thought. Listed by author. |
| MIGA The Multilateral Investment Guarantee Agency (MIGA) is a member of the World Bank Group. Its purpose is to facilitate the flow of foreign direct investment to its developing member countries through t |
| Models_of_the_Economy Provides essays about and software for forecasting the economy through the use of financial and macroeconomic models. |
| NetEc collection of networking projects for academic Economics. |
| Resources_for_Economists_on_the_Internet_(RFE) Extensive guide of economics-related information on the web. Sponsored by the American Economics Association and edited by Bill Goffe. |
| Ten_Recurring_Economic_Fallacies,_1774–2004_-_Mises_Institute Serious and recurring economic fallacies to which top leaders (political, corporate, academic) have subscribed and from which they cannot seem to free themselves. |
| WebEc WWW resources in economics listed as part of the WWW Virtual Library. |
| WoPEc is a service for finding and downloading the latest research results in economics. It contains around 11,000 papers. |
| Technology_Review_-_The_Economics_of_Brains Article discusses neuroeconomics: brain research informing economics. (May, 2005) |
| The_Amber_Ranch Dominican rough blue amber for jewellers and collectors. |
| Bluechart A gem identification chart for $18. |
| Caribbean_Gemological_Institute Caribbean jewelers organization includes jewelry, shopping and travel tips.. |
| Dan_Dennis Author of "Gems: A Lively Guide for the Casual Collector." |
| Florida_Gold_Coast_&_Mineral_Society Gold and Mineral Society in Florida. |
| FTC FTC Guides for jewelry and precious metals. |
| Gem_Hut Hundreds of descriptions for gems, minerals, and rare metals. Pictures, hardness, and composition. |
| Gemology_Tools Software for the professional gemologist or gemology student/enthusiast. |
| Gems_and_Precious_Stones An on-line gem and jewelry course at UC Berkeley. |
| Gemstone_Forecaster_Newsletters Analyzes Burma ruby and sapphire gems and collector gemstone markets. |
| GeoNord Gem and mineral site from Sweden. |
| The_Image Mineral and gemstone galleries. Physical properties and historical facts for minerals and gemstones. |
| National_Gemstone Introduction to collecting and investing in gemstones and colored diamonds, with descriptions of the types most widely traded. |
| NOVA Gemstone primer with photos and vital information regarding gemstones. |
| Secret_Jewelry_Collection A Japanese collector's site of jewelry, minerals and gemstones. |
| Secrets_of_the_Gem_Trade__The_Connoisseur\'s_Guide_To_Precious_Gemstones_ A new gem book by by R. W. Wise. |
| Smithsonian_Gem_&_Mineral_Collection Pictures and short descriptions of gems and minerals found at the Smithsonian. |
| University_of_Texas_Gem_Class Gem and Mineral class at the University of Texas, Austin. |
| Biological_Effects_of_UV_Radiation_from_Radioisotopes Research paper on emission of UV radiation from radioisotopes discovered recently by the author. Its biological effects, when administered in to the body as radiopharmaceutical was dealt with in this |
| DOE_Openness__Human_Radiation_Experiments The Office of Human Radiation Experiments, established in March 1994, leads the Department of Energy's efforts to tell the agency's Cold War story of radiation research using human subjects. Identifi |
| Eneabba_Walkabout Problems with the technological enhancement of natural radioactivity and about 1,000 'radiation-related' links to about 170 countries |
| Health_Effects_of_Ionizing_Radiation A comprehensive report from the Canadian Environmental Advisory Council on the biological effects of radiation. Genetic damage, latency of cancer, units of exposure, biological effectiveness of radiat |
| Health_Physics Journal of the Health Physics Society. Provides abstracts and information about online subscription, services and author submission materials. |
| How_Stuff_Works__Nuclear_Radiation Tutorial on ionizing radiation and how it affects all living organisms. |
| Ionising_Radiation_and_Health_Risk_Analysis Simple to understand and user-friendly introduction to basic radiation concepts and health risk assessments. |
| Ionizing_Radiation_Risks Estimates of exposure to low-level ionizing radiation and related topics by Wolfgang Kohnlein. |
| Ionizing_Radiation_Standards,_Canadian_Institute_for_National_Measurement_Standards Conducts research and development on measurement of ionizing radiation and provides services such as calibrations, |
| Low-dose_Radiation_Effects Canadian Radiobiologist, Dr. Ron Mitchel, describes the latest scientific research showing how low doses of radiation can prevent cancer and birth defects. |
| Multi-Agency_Radiation_Survey_and_Site_Investigation_Manual_(MARSSIM) Official site for U.S. multi-agency (EPA, NRC, DOE) consensus document on planning, conducting, evaluating, and documenting environmental radiological surveys of surface soil and building surfaces for |
