NASA Tech Briefs: Engineering Solutions for Design and Manufacturing
NASA Tech Briefs is a monthly magazine that summarizes technologies developed through NASA research and their commercial applications. Free of charge, the magazine's Web site has much of the information that is published in print, while also offering an easy-to-navigate interface. The Tech Brief Library is an archive that dates back four years in twelve different categories, ranging from mechanics to software. The Technical Support Packages have even more detailed information in downloadable Ado
World's Largest Math Event
April is Mathematics Education Month, and the National Council of Teachers of Mathematics will celebrate with the eighth annual World's Largest Math Event (WLME). The WLME Web site has activities from all eight of the events, which are suitable for grade school teachers to introduce in their classes. This year's WLME theme is Entertaining Mathematics; previous years' themes include Animals As Our Companions, The Power of Nature, and Math Olympics. The activities given on the site use mathematics
Earth Observatory: Melting Snows of Kilimanjaro
Satellite photos of Mt. Kilimanjaro have become recently available from NASA's Earth Observatory, a "freely-accessible publication on the Internet where the public can obtain new satellite imagery and scientific information about our home planet." Taken in 1993 and again in 2000, these photos chronicle the dramatic disappearance of Kilimanjaro's glacial ice cap, a sensitive indicator of climate change that some scientists believe may vanish altogether by 2015. The Web site provides links to othe
National Diatom Database
Single-celled diatoms are "powerful indicators of environmental conditions as they respond quickly to environmental changes, and are widely utilized in stratigraphic investigations." The Geological Survey of Canada's National Diatom Database contains two components, the first of which includes about 5,000 diatom samples, their description, and precise geographic location. The second has 1,500 entries that give "information on the environmental and ecological tolerance of individual diatom specie
Magplane: Transportation for the Information Age
The Magplane concept involves electromagnetically levitated vehicles designed for fast intra-city travel. This is in contrast to most other systems that focus on intercity travel; the goal of the Magplane system is to connect suburbs and locations up to 250 miles from a central metropolitan area, with travel times of about an hour or less. The Magplane home page offers many details of the system's design and operation. Five technical papers are also presented, which describe some of the engineer
The Extrasolar Visions Web site provides a searchable guide to extra solar planets. These include planets of normal stars, pulsar planets, brown dwarfs, protoplanetary disks and protoplanets, extragalactic worlds, massive compact halo objects, and disproven or doubtful worlds. Visitors can search for these objects or view the week's 20 most popular systems, 20 most interesting systems, or the 20 most recently updated systems. Once chosen, the objects name, mass, average distance, and type is giv
Parkinson Disease - Cranial Nerves Exam - Trigeminal (CN V) Nerves Sub-exam - Patient 4
This 76-year-old man developed tremor of his right arm and leg 15 years ago. It has increased in severity over the years. A shaking right hand affects his writing, dressing and drinking. Occasional drooling, difficulty rolling over in bed and a soft voice at times are also issues. The tremor has affected his writing and he has mild difficulty with buttons and zippers. He spills when he uses his right hand to drink. He has occasional drooling and slight difficulty rolling over in bed. His voice
Site Libre Savoirs: Mécanique des milieux continus
Domaine: Science des matériaux, mécanique, génie mécanique
L\'enseignement présente les concepts fondamentaux de la Mécanique des milieux continus qui sont mis en oeuvre sur des exemples simples en Mécanique des fluides et en Mécanique des solides. La démarche se concentre sur les milieux continus tridimensionnels et sur les notions de contraintes et de déformations, présentées en quatre étapes :
The following websites provide a quick review of prion research in the news. Prions, short for "proteinaceous infectious particles," are responsible for Creutzfeldt-Jakob Disease (CJD), mad cow disease, scrapie disease, chronic wasting disease, and other deadly brain diseases. The first website, a Science Update from the journal _Nature_, reports on an intriguing study published earlier this year that found genes in some human populations offer protection from prion diseases, possibly in respons
University of Illinois Extension's Just for Kids
Designed for younger students, this Web site from the University of Illinois Extension offers a number fun, interactive programs on a variety of life science topics. Most of the activities include a guide for teachers, which differ in level of detail. The activities themselves vary in their format and features, from animated cartoons with minimal text to pages of text with no diagrams at all. Check the teachers' guide of each activity for appropriate grade level. The activity about earthworms ti
McMaster University: Hitchcock Group
This website promotes research by the Hitchcock Group at McMaster University with the "applications of inner shell excitation spectroscopies and microscopies to the analysis of advanced materials." Researchers can find general overviews, in-depth summaries, and highlights about the group's projects in the areas of synchrotron radiation and electron impact. Students can find out about funded research positions and postdoctoral opportunities. The website offers pdf files of the group's publication
The Microbial Ecology Group of Munich's University of Technology has recently launched probeBase, "a comprehensive database containing published rRNA-targeted oligonucleotide probe sequences, DNA microarray layouts and associated information." Users may search for sequences by target organism, which "can assist in the development of new rRNA-targeted oligonucleotide probes for fluorescence in situ hybridization (FISH)," or by probe name for rapidly retrieving published probes targeting desired s
Bush Cites Need to Develop Affordable Hydrogen-Powered Fuel Cells
In his State of the Union Address on January 28, 2003, President Bush made a case for further fuel cell development. Current efforts in this area have not determined how to efficiently produce or extract hydrogen for the cells. In hopes of solving this problem, Bush proposed a $1.2 billion FreedomFUEL initiative. The first site discusses the initiative and its potential to create a nearly pollution-free method of electricity generation.
The American Society of Mammalogists
Founded in 1919, the American Society of Mammalogists (AMS) is an organization, composed primarily of professional scientists, that promotes mammal study. The members of AMS also work to provide "information for public policy, resources management, conservation, and education." A notable ASM site feature is the Mammal Image Library which provides "images of mammals for educational purposes worldwide." The ASM website also contains information about two main publications, _The Journal of Mammalog
Presented by the Museum of Science, Boston, the Ocean's Alive Web site takes a look into the fascinating world of oceans. The Water Planet link has information about the physical features of oceans, how they've been created, the water cycle, and ocean profiles. Other links explain ocean currents, winds and waves, tides, life in the sea, and scientists who study the oceans. The site contains good and easy-to-read descriptions, along with unique and interesting illustrations that make it fun to ex
Fairly Fundamental Facts about Forces and Structures
Students are introduced to the five fundamental loads: compression, tension, shear, bending and torsion.
Build Your Own Mobile
This activity allows children to construct something themselves and be creative while learning about the concept of the center of mass.
A complete guide to templates and tutorials for making tessellations is available here. Includes scholarly information on tessellations and their connections to math, geography and history. Some lessons feature ClarisWorks, Geometer, HyperCard, HyperStudio, LogoWriter, PCPaintbrush or PCPaint software programs. This site also includes a forum for teacher feedback and examples of student work.
Using technology to support Limited-English-Proficient (LEP) students' learning experiences
This article examines the challenges and rewards related to using technology as a tool to increase learning for limited English-proficient (LEP) students. The article is based on the belief that students' content, linguistic, and technology skills should be developed in tandem. Strategies and standards for technology use are featured along with suggestions for enhancing LEP students comfort level in content classes. Access and equity and the redefinition of teacher roles are also discussed. Impr
Discovery may jump-start mine remediation efforts
This article from November 30, 2000 describes how bacteria contribute to detoxify ground water by chemically altering lead and zinc compounds resulting in useful mineral deposits. It underscores the relationships between the hydrosphere, lithosphere, and biosphere and points to bioremediation processes useful in controlling contaminations associated with mining.