| Professional_Pyrotechnicians Join the Professionals as they discuss the latest effects and techniques in this thousands year old art form. Log in and registration required. |
| Wolter_Pyro_Tools Makes and sells hand machined tooling for pyrotechnics, rocket making, star plates, tips and trick, tools and theory of pyrotechnics. |
| Wood_plugs Fireworks mortar tube wood plugs |
| Wouter\'s_Practical_Pyrotechnics Detailed instructions for starting a fireworks hobby. Chemicals, tools, formulae, tutorials, and links. |
| The_Lunar_Times Provides Moon rise, set, position and phase seen from different parts of the world. |
| Solar_Photoperiod_Calculator For a given location and date calculates sunrise, sunset, civil twilight, sun height; in JavaScript and an Excel file. |
| Sun_Models Offers Sun calculators written in Excel/VBA. |
| Sun_or_Moon_Rise/Set_Table_for_One_Year Obtain a table of the times of sunrise/sunset, moonrise/moonset, or the beginning and end of twilight, for one year. |
| SunHeight Offer on-line calculator for Sun and some other solar system bodies. |
| Sunrise_and_Sunset By latitude and longitude. |
| Sunrise_and_Sunset_Times Calculate sunrise and sunset times for your particular location. |
| Sunrise,_Sunset_and_Twilight_Times Calculate the rise and set time of the sun for anywhere in Australia. |
| The_Sunrise_Times Provides time of sunrise and sunset for places around the world. |
| Sunrise/Sunset_Calculation Online utility for calculating the apparent sunrise and sunset. |
| Sunriset Online calculator of sun rise/set times for any location. Interactive world map is available. |
| SunTimes_Version_4_0 Windows freeware interactive viewer showing day and night move across the world's timezones. |
| Tables_for_Sun_and_Moon_Rise_and_Set Authoritative source for tables of sunrise/sunset, moonrise/moonset and twilight by year. |
| Worldtime A service featuring an interactive world atlas, information on local time and time zones as well as sunrise and sunset times in several hundred cities, and a database of public holidays worldwide. |
| Aquaflex Vendor information about a sensor that measures both soil moisture and soil temperature over a large volume of soil. |
| Earth_Systems_Solutions Soil moisture monitoring and sampling instruments for soil science, agricultural, irrigation, and environmental applications. |
| Kel_Instruments_Co__Inc_ Specializing in soil pH and salinity test instruments. |
| Soilmoisture_Equipment_Corp_ Manufacturer of instruments to measure and extract soil moisture. Products include tensiometers; extractors, compressors and manifolds; plant water status console; salinity sensing equipment; soil |
| The_British_Society_for_Population_Studies The main objectives of the Society are to further the scientific study of biological, economic, historical, medical, social and other disciplines connected with human populations. |
| Bundesinstitut_für_Bevölkerungsforschung_(BiB) The site of the German Federal Institute for Population Research contains information on population research in Germany (both in German and English). |
| Centre_d\'information_et_d\'études_sur_les_migrations_internationales_(CIEMI) Documentation library, reports and books on internal and international migration (in French, English and Italian). |
| Centre_for_Applied_Population_Research_(CAPR) at the University of Dundee, Scotland; provides information on population research projects of the centre. |
| Centre_for_European_Migration_and_Ethnic_Studies_(CEMES) Policy-relevant research, information and publications on international migration, ethnic relations and related topics in Western, Central and Eastern Europe. |
| Comité_International_de_Coopération_dans_les_Recherches_Nationales_en_Démographie_(CICRED) This site presents a population multilingual thesaurus, a review of population journals and a database of population study or research centres. |
| Council_for_European_Social_Science_Data_Archives CESSDA promotes the acquisition, archiving and distribution of electronic data for social science teaching and research in Europe. |
| Czech_Republic_Population_Information_(POPIN_Czech_Republic) Provides information on national population trends and population research. Time series of population statistics and indicators are available. |
| Demography_at_Humboldt_University_Berlin A web site on population studies in Germany (in both German and English). |
| Demography_Russian_Federation Site about Russian demography, includes data and information on famous (Russian ) demographers. (in Russian only) |
| Demography_Unit_(SUDA) Information about the activities of the Stockholm University Demography Unit. |
| Deutsche_Stiftung_Weltbevölkerung Activities and objectives of the Germann Foundation for World Population. (in German and English) |
| ESSDA Estonia Social Science research unit. |
| European_Migration_Information_Network A database of information relating to international migration. |
| European_Youth_Observatory Comparative data about the situation of young people in different cities in Europe, reports, information about practices, and documents related to youth and youth policy in the different cities and re |
| Hacettepe_University_Institute_of_Population_Studies The site of the Turkish Institute of Population Studies contains information on population research in Turkey (both in Turkish and English). |
| INFOSTAT_Bratislava Analysis and forecasting population development. |
| Institut_für_Demographie_(IFD) The Austrian Institute for Demography presents information on their organization, research program, research projects and publications (in German and English). |
Science Education
Previous ElementTable of ElementsNext Element
95AmAmericium243