Time and Frequency Division at the National Institute of Standards and Technology

The Time and Frequency Division is an operating unit of the Physics Laboratory of the (US) National Institute of Standards and Technology (NIST). It maintains the primary frequency standard for the United States, develops and operates standards of time and frequency and co-ordinates US time and frequency standards with other world standards. The Division's website provides details of its services and research, frequently asked questions, a glossary, a database of full text, time and frequency publications written by NIST personnel since 1914, and links to related websites. Web exhibits include: a history of the measurement of time, a history of calendars, the invention of the quartz watch, the background to daylight saving time, and a short history of NIST time and frequency measurement.

http://tf.nist.gov/

Copyright 2006-2009

Radiation of sound

Notes are provided on the sources and radiation of sound, covering point sources, interaction of coherent point sources, radiation from cylinders, radiation from spheres, scattering by spheres and radiation from planar sources. A reference list and short bibliography are included. These notes were written by Finn Jacobsen, Technical University of Denmark, and Peter Juhl, University of Southern Denmark, for a course in advanced acoustics and are available as a PDF file.

http://server.oersted.dtu.dk/ftp/fja/Radiation.pdf

Copyright 2006-2009

NOAA's Aquarius : world's only undersea research station

Aquarius is an underwater laboratory situated adjacent to deep coral reefs in the Florida Keys National Marine Sanctuary. Scientists live underwater in Aquarius during ten-day missions to study the reef and surrounding ocean. Live webcams of the laboratory are available during missions. There are frequently asked questions; press releases; lessons about buoyancy, pressure, light and coral reefs; and summaries of past missions. Links to other websites about coral reefs and marine biology are listed. Aquarius is owned by the US National Oceanic and Atmospheric Administration (NOAA) and is operated by the NOAA Undersea Research Program's Undersea Research Center at the University of North Carolina Wilmington.

http://www.uncw.edu/aquarius/

Copyright 2006-2009

Introduction to statistical analyses

Compiled by Barry Shepherd, Magnus Johnson and Ted Gaten, Department of Biology, University of Leicester, 'Introduction to statistical analyses' provides a comprehensive coverage of statistical techniques for field biologists. the site covers techniques used in descriptive statistics, diversity indices, comparisons, correlations/relationships/trends and predictions. Other sections include data categories and initial appraisal and overriding limitations of statistics. A glossary of terms is provided, as are references and web sites of interest. Made available on the Web by the University of Leicester.

http://www.le.ac.uk/biology/gat/virtualfc/Stats/start.html

Copyright 2006-2009

Carnivore Ecology & Conservation

Resources on carnivores (with sections on Felidae, Canidae, and Ursidae) for scientists and conservationists: news, searchable literature database, dissertations, meetings and conferences, action plans, jobs. This is the personal website of Guillaume Chapron, assistant professor at Grimso Wildlife Research Station, Swedish Agricultural University The site includes: automatically updated news, a searchable literature database with 15778 papers and 459 full theses to download, future meeting details and proceedings of past ones, action plans, automatic job watch, and ecological knowledge monitoring via RSS feeds from relevant journals.

http://www.carnivoreconservation.org/portal/index.php

Copyright 2006-2009

Engineering Pathway

"The Engineering Pathway is a portal to high-quality teaching and learning resources in engineering, applied science and math, computer science/information technology, and engineering technology and is designed for use by K-12 and university educators and students"

http://www.engineeringpathway.com/ep/index.jhtml

Qwiki

Qwiki is a quantum physics wiki including, but not limited to, quantum optics, quantum metrology, quantum control, quantum information and quantum computation. It was created by the Mabuchi Lab at Stanford University and aims to encourage collaboration amongst the quantum physics community. Registered users may post content.

http://qwiki.stanford.edu/wiki/Main_Page

Copyright 2006-2009