Black holes 'preceded galaxies'

Astronomers believe they have solved a cosmic chicken-and-egg question: what came first - black holes or galaxies?

news.bbc.co.uk

Everest trip helps critically ill

Blood oxygen levels recorded on a trip by medics to Everest could help the treatment of critically ill patients.

news.bbc.co.uk

'Wolfman' returns

Explorer Jim McNeill tracks down Arctic wolves

news.bbc.co.uk

Zimbabwe troops 'eat elephants'

A Zimbabwean wildlife campaigner tells the BBC that soldiers are being given elephant meat to eat, as the economic crisis deepens.

news.bbc.co.uk

Heat may spark world food crisis

Half the world's population could face food crisis by 2100 as soaring temperatures cripple staple crops, scientists warn.

news.bbc.co.uk

China alert over bird flu death

Chinese authorities shut down and clean poultry markets in Hebei province, after the first human death in nearly a year.

news.bbc.co.uk

Feilden's blog

Ground-breaking new technique in stem cell science

news.bbc.co.uk

US vows 'huge' marine protection

The US is to establish "the largest area of protected sea in the world", banning fishing and mining, around its Pacific islands.

news.bbc.co.uk

Earth Watch

Why it is hard to predict sudden environmental crises

news.bbc.co.uk

A deep-sea fish caught in the Pacific has mirrors for eyes

A deep-sea fish caught in the Pacific has eyes which use mirrors as well as lenses, scientists discover.

news.bbc.co.uk

Baby Jupiter's huge weight gain

The planet Jupiter must have gained mass fast during its infancy, according to astronomers.

news.bbc.co.uk

Animal matters

Scotland's debate over tests on primates

news.bbc.co.uk

Mosquitoes make sweet love music

Sexy songs sung by mosquitoes in courtship could be key to curbing the spread of dengue fever, say scientists.

news.bbc.co.uk

Venomous mammal caught on camera

Rare footage of one of the world's most strange and elusive mammals is captured by scientists.

news.bbc.co.uk

Canadians claim South Pole record

A trio of Canadians claim a new record for the fastest trek across Antarctica to the South Pole.

news.bbc.co.uk

Mummy of female pharaoh uncovered

Egyptologists find remains of a mummy thought to belong to a queen who ruled 4,300 years ago, Egypt's antiquities chief announced.

news.bbc.co.uk

Panda bites his third tourist in two years at Beijing zoo

A panda at Beijing zoo bites a man for the third time in two years.

news.bbc.co.uk

Holes give edge to new armour

Scientists from the UK Ministry of Defence (MoD) have devised ultra-hard vehicle armour to protect military personnel.

news.bbc.co.uk

Body repair 'could be ramped up'

A combination of drugs could trick the body into sending its repair mechanisms into overdrive, say scientists.

news.bbc.co.uk

Beagle hunter

On a mission to find the most famous ship of science

news.bbc.co.uk

Tech fair offers greener vision

Analysts at the Consumer Electronics Show say green credentials of tech products will become critical to success.

news.bbc.co.uk

Eat it or lose it - why centuries of crop diversity are at risk

Centuries of crop diversity are at risk of being lost forever as farmers turn to just a few modern, high yielding varieties.

news.bbc.co.uk

Poetry or science?

Is romantic love just a chemical cocktail?

news.bbc.co.uk

First flight of algae-fuelled jet

Continental Airlines is the latest to test fly a jet biofuel, this time with a product derived partially from algae.

news.bbc.co.uk

Our writers talk back

Some of the previous contributors to the Green Room respond to readers' questions and comments.

news.bbc.co.uk

 Science > Television

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Science > Television

Television:

Analog TV Broadcast Systems

Overview of color transmitting, voltage and frequency parameters of analog TV broadcast systems.

http://www.stjarnhimlen.se/tv/tv.html

Graand

Free Classified Ads Portal

www.graand.com

BBC Research & Development

Site features excellent papers covering current technology throughout the video chain.

http://www.bbc.co.uk/rd/pubs/papers/

Broadcast Net

Links to broadcast related sites, classified ads, and broadcast related software.

http://www.broadcast.net/

Broadcast Papers

Business and technical papers for the broadcast industry.

http://www.broadcastpapers.com/

Close-up by Joe Fedele

A magazine for broadcasting professionals. Contains articles about analog and digital television technology.

http://www.fedele.com/frame.html

Doug Lung's RF Technology Page

TV transmitter and RF engineering.

http://www.transmitter.com/

Electrical Engineering Training

Covers a number of topics relating to RF transmission.

http://www.tpub.com/neets/

Erecting a TV Antenna

Includes a comprehensive encyclopedia of TV antenna terms and topics.

http://www.hdtvprimer.com/ISSUES/erecting_antenna.html

FCC Title 47 Regulations

Code of Federal Telecommunication Regulations in HTML and PDF formats.

http://www.access.gpo.gov/cgi-bin/cfrassemble.cgi?title=200447

Grass Valley Dictionary

Dictionary of electronics terms from the Grass Valley Group.

http://www.thomsongrassvalley.com/docs/Miscellaneous/Dictionary/

How Projection Television Works

Fully-illustrated unbiased tutorial describes how projection TVs form a small image on a device inside the projector - either a CRT or LCD - and then shine that image onto a large screen located elsewhere.

http://www.howstuffworks.com/projection-tv.htm

How Television Works

Easy to read article that describes how television works.

http://www.howstuffworks.com/tv.htm

Television

Features information, links and the history of television in the UK.

http://tx.mb21.co.uk/

NTSC-TV

Tutorials on television basics, including broadcast engineering.

http://www.ntsc-tv.com/

PAL NTSC Film Converter

Several reviews about the television standards of PAL and NTSC are represented. Especially the refresh rates are explained in detail. Run time conversions between different medium types are also discussed.

http://www.paradiso-design.net/videostandards_en.html

Pal Secam NTSC World Standards

Technical specifications of the world standards and list of countries and their adopted format. Additionally, a brief history of TV standards.

http://www.videointerchange.com/pal_secam_conversions.htm

Tech-Notes

Technology reports and other matters of interest specific to the broadcasting engineer.

http://www.tech-notes.tv/

Television Production

TV production course covering the basics of lighting, audio, video and editing.

http://www.cybercollege.com/tvp_ind.htm

Television Production Book

Explains television lighting and audio/video basics.

http://www.tv-handbook.com/

Unofficial FCC Document Locator

Includes lots of links and charts related to broadcast.

http://www.jneuhaus.com/fccindex/

Video Measurement Tutorials from Tektronix

Helps to understand the nature of component video. Includes detailed descriptions of signal distortions and monitoring techniques.

http://www.tek.com/Measurement/App_Notes/Component_Puzzle/

Williamson-labs television

Graphics and formulas dominate this site which covers major aspects of video broadcast engineering.

http://www.williamson-labs.com/

World Analog Television Standards and Waveforms

Details of television transmission standards used around the world.

http://www.pembers.freeserve.co.uk/World-TV-Standards/

World Television Standards

A listing of analog broadcast formats from around the world.

http://kropla.com/tv.htm

Worldwide TV Standards - A Web Guide

Comparison of the various analog TV standards.

http://www.ee.surrey.ac.uk/Contrib/WorldTV/index.html