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ZDNet Dictionary Definition
- Wavelength
- The distance between crests of a wave. The wavelength determines the nature of the various forms of radiant energy that comprise the electromagnetic spectrum. For electromagnetic waves, the...
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- The world's most powerful virtual telescope
- Astronomers have successfully combined three telescopes located on Mauna Kea in Hawaii to create the largest virtual telescope for short wavelengths. The Extended SubMillimeter Array eSMA connects the signals from the SubMillimeter Array SMA, consisting of eight dishes with 6-meter diameter, with those from the 15-meter James Clerk Maxwell Telescope...
- Blog posts 2008-11-28
- Photonic Nanojet-Enabled Optical Data Storage
- This paper shows that their recently reported microwave photonic jet technique for detection of deeply sub wavelength pits in a metal substrate can be extended to optical wavelengths for purposes of high-density data storage. Three-dimensional finite-difference time-domain computational solutions of Maxwell's equations are used to optimize the photonic nanojet and...
- White papers 2008-09-01
- Solar nanoantenna energy collectors
- U.S. researchers have developed a cheap way to produce plastic sheets containing billions of nanoantennas that collect solar energy. As said one Idaho National Laboratory INL scientist, 'these antennas are good at capturing energy, but they're not very good at converting it.' In fact, the team estimates these individual nanoantennas...
- Blog posts 2008-08-11
- Satellites seeing clearly despite clouds
- Two researchers at Pacific Northwest National Laboratory PNNL have developed a mathematical tweak which dramatically improves air pollution detection on cloudy days. They've found a way to reduce cloud-induced glare when satellites measure blue skies on cloudy days, by as much as ten-fold in some cases. 'Because clouds represent one...
- Blog posts 2008-05-13
- New+%22GiFi%22+wireless+chip+unveiled%3A+5+gigs+per+second+up+to+10+meters%21
- New+%22GiFi%22+wireless+chip+unveiled%3A+5+gigs+per+second+up+to+10+meters%21Practical?Not.Here's an idea. Let's use light. It has even shorter wavelengths and can transmit gobs of data. Oh, wait. It can't penetrate walls.That's a problem you being to run into with shorter and shorter wavelengths. millimeter wavelengths don't penetrate structures very well at all.That can be good thoughTake for instance...
- Discussion threads 2008-02-22
- Physical Impairment Based Regenerator Placement and Routing in Translucent Optical Networks
- A novel Constraint-Based Routing CBR algorithm taking into account the dominant linear and nonlinear fiber optical transmission impairments has been analyzed. It is shown that CBR and intelligent regenerator placement decrease the blocking probability significantly. In future transparent optical transmission systems automatic wavelength switching will be introduced (Automatically Switched Optical...
- White papers 2008-01-22
- 120 Mbps upstream? Even 30 Mbps? Come on- who really needs it?
- Note: I've amended this post with corrective information, including this from our networking guru, George Ou. George,an actual engineer, points out: You cannot claim DOCSIS 3.0 is 160/120 down/up service and compare it to 50/30 down/up FiOS service. That is grossly misleading. 160/120 down/up in...
- Blog posts 2007-12-03
- Worst-Case Analysis of Dynamic Wavelength Allocation in Optical Networks
- This white paper considers Wavelength Division Multiplexed WDM optical networks. WDM networks use multiple communication channels over a single optical fiber. The channels are at different wavelengths. These networks support lightpaths, which are end-to-end circuit-switched communication connections that traverse one or more links and use one WDM channel per link.
- White papers 2007-11-08
- Images: Streaking star carries a tail of seeds
- NASA discovered that a red-giant star rocketing across the universe is leaving a trail of debris that could eventually form new stars, solar systems and even life.NASA scientists are estatic over the discovery of a tail or trail of gas and dust trailing the red giant star Mira as it...
- Image galleries 2007-08-16
- Lenses that bring everything into focus
- Scientists at the University of Michigan have developed a new lens device that will shrink huge light waves to pinpoints. The superlens looks like a plate and "is etched with a specific pattern. As the waves pass through the patterned lens, it is sculpted into different sizes and shapes. The...
- Blog posts 2007-07-14
- NXTcom bears witness to ROADM's major role in broadband video distribution
- I type: ROADM.You think: ah, short for "Road Map."That may well be the case, but not here at NXTcomm here in Chicago.One of the major themes of this major telecom industry event is greatly I am going to make up a word here efficientized video delivery by use of a...
- Blog posts 2007-06-19
- A terabyte of data on a regular DVD?
- This is the promise of the 3-D Optical Data Storage system developed at the University of Central Florida UCF. This technology allows to record and store at least 1,000 GB of data on multiple layers of a single disc. The system uses lasers to compact large amounts of information onto...
- Blog posts 2006-12-07
- Woman claims Wi-Fi makes her sick
- Woman claims Wi-Fi makes her sickNew age rubbish![i]"but none of them has been able to prove Wi-Fi is safe"."[/i]Yeah - and nobody has been able to prove that wearing crystals cures cancer, colds and flu nor has anyone been able to prove that lying down with a candle on either...
- Discussion threads 2006-11-24
- A photonic 'lab-on-a-chip'
- Georgia Tech researchers have shrunk an optical device called wavelength demultipler WD by combining into one crystal three unique properties of photonics crystals. This optical discovery opens the way to sophisticated and cheap biosensors mounted on 'lab-on-a-chip' devices -- sensors to run blood tests, detect chemicals in water supplies or...
- Blog posts 2006-08-06
- Design Tools for Transparent Optical Networks
- Optical technology promises to revolutionize data networking by providing enormous bandwidth for data transport at minimal cost. A key to cost reduction is to increase transparency, that is, to keep a data stream encoded as an optical signal for as long as possible. Wavelength switching increases transparency by allowing different...
- White papers 2006-08-04
- Broadband fiber ain't what it used to be
- There's a mythology out there, spread by the uninformed, that since 90 percent of broadband fiber is sitting in the ground and we getting exponentially better at sending massive amounts of bits through the air, that fiber's time has come and gone. Not so. As the demand for rich...
- Blog posts 2006-02-23
- YP Waves 1.0 (Mac)
- YP Waves simulates up to 3 traveling sine waves simultaneously. It is easy to change the amplitude, wavelength, velocity and phase constant of each wave. This program is perfect to teach waves characteristics (amplitude, wavelength, etc.), the superposition principle, standing waves, interference of waves, beats, etc.
- Software downloads 1999-08-26
Additional Resources
- Apple contemplating free, ad-supported iPhone?
- Apple has no tasteOh, wait, no, that was Microsoft that had no taste because there are Windows 7 desktop themes available that have images of Coke cans in them. Isn't that right tigertank? For some reason that I can't wait to hear, this move by Apple, however, is very tasteful.Cue...
- Discussion threads 2009-11-17
- EPA takes next step toward regulating greenhouse gases in U.S.
- CO2 a Pollutant?G'day,The EPA claims CO2 is detrimental to human health. What a lot of bovine excrement! Without CO2, we all die, full stop! There is quantified evidence that if the concentration of CO2 was doubled, it would lead to a temperature increase of 0.5 to 0.75% max.CO2 currently...
- Discussion threads 2009-11-09
- Intel: 32nm is just the beginning
- Intel hasn't released its 32nm Westmere processors yet, but executives spent the first day of the Intel Developer Forum IDF talking about technology even farther down road. In his keynote, executive VP Sean Maloney gave a glimpse of a desktop running Sandy Bridge, the new microarchitecture that comes after Westmere,...
- Blog posts 2009-09-23
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