New Plastic Optical Fiber Technology May Revolutionize High Speed Last-mile Communication Networks Nov 9, 2009
But those properties typically come at the expense of lower bandwidth and high attenuation, restricting their use to sending data over short distances at relatively low speeds. As a result, POF networks have mostly been used as an alternative to copper wires for short-distance -- or so-called last-mile -- data transmission. (Science Daily)
The Anti-ID-Theft Bill That Isn't Nov 1, 2009
This public shaming needs the cooperation of the press and, unfortunately, there's an attenuation effect going on. The first major breach after California passed its disclosure law -- -- was in February 2005, when ChoicePoint sold personal data on 145,000 people to criminals. (Yahoo News -- Online Privacy)
Cable-Tec Expo 2009: Aurora Cranks QAM Transmitter To 80-Plus Channels Oct 29, 2009
The new QAM transmitter incorporates a preamplifier, which enables a very low input level to the transmitter -- a key requirement for narrowcast services because the complexity of routing the signals to the transmitter can result in greater signal attenuation. Whereas an external amplifier typically would be needed to maintain the correct input level for the transmitter, the AT3535G's preamplifier eliminates this need. (Multichannel News)
New Nasa rocket prepares to fly Oct 27, 2009
"Getting some actual data on that phenomenon during Ares I-X is going to help those designers know how much of an attenuation system they are going to need for Ares I," said Mr Ess. Crucial test. (BBC News -- Americas)
Top SA inventions Sep 24, 2009
In the early 1960s Cormack showed how details of a flat section of soft tissues could be calculated from measurements of the attenuation of X-rays passing through it from many different angles. He thus provided the mathematical technique for the CAT scan, in which an X-ray source and electronic detectors are rotated about the body and the resulting data is analysed by a computer to produce a sharp map of the tissues within a cross-section of the body. (iAfrica.com)
Calypso partners with energy exploration firm Aug 25, 2009
PORTSMOUTH Calypso Communications and Strategic Carbon Initiative (SCI) have teamed to commercialize a science-driven enterprise that will serve international demand for carbon sequestration, methane hydrate energy exploration, and the assessment of natural ecosystem attenuation potential and protocol ... Using stable carbon isotope finger printing to determine sources of organic contaminants and radiocarbon isotope analysis to develop natural attenuation rates, SCI offers clients unique... (Seacoast New Hampshire)
Cell antenna plan on Westford water tank draws opposition Aug 21, 2009
Representatives from Omnipoint said, placement of the equipment and attenuation gear will limit noise to acceptable decibel levels. The board will seek independent confirmation of predicted noise levels and will schedule another site visit to confirm equipment placement claims before considering whether to grant approval. (Westford Eagle, MA)
Officials: Special Plastic Sleeves May Stop Identity Theft Jul 13, 2009
The State Department asserts that hackers won't find any practical use for data skimmed from RFID chips embedded in the cards, but "if you don't want the cards read, put them in an attenuation sleeve," says John Brennan, a senior policy adviser at the Office of Consular Affairs. Gigi Zenk, a spokeswoman for the Washington state Department of Licensing, says the envelope her state offers with the enhanced driver's license "ensures that nothing can scan it at all.". (Fox News)
What's hot in analog technology? Jul 10, 2009
These high-speed signals may be "digital" in theory, but they exist in a Gbps analog world so they suffer distortion, group delay, phase shifts, roll off, attenuation, and noise, and all the other ills of the real world. Keeping them clean, pure, and error free, while driving them down coax or CAT5 or twisted pair cables takes specialized analog circuitry and management. (EETimes)
Better Than A Hearing Aid? Better Hearing With Bone Conducted Sound Jul 10, 2009
This measure gives the maximum attenuation achievable with ordinary hearing protection devices, like ear-plugs and ear-muffs. It also shows the possible noise reduction from the surrounding noise by using a BC microphone, instead of an ordinary AC microphone in front of the mouth, to record one's own voice in a noisy environment. (Science Daily)
Hitachi to supply lithium-ion batteries to GM Jul 2, 2009
In addition to DLX's four new testing customers, testing by two of DLX's existing customers, Shandong Zaozhuang and Beijing Zhongke, on the natural attenuation rate curve is nearing completion. Early reports indicate that over the past 45 days, the change of curve has maintained good consistency with a very little decay rate. (Fresno Bee -- Business)
Agony and ecstasy Jun 20, 2009
He believes the fear and defensiveness that characterise PTSD are obstacles to treatment, and that it is MDMA s attenuation of these emotions that permits concurrent psychotherapy to be effective. He will publish the study shortly. (The Economist)
Hybrid Scanner Brings Molecular Functioning To The Forefront Jun 17, 2009
However, a combined PET/MRI cannot provide accurate, reliable images unless it includes a method to account for PET attenuation. Attenuation refers to the scattering of photons that should be detected by PET scanners, but fall out of their range or are absorbed by the body instead ... In combined PET/CT systems, attenuation mapping is performed routinely based on available CT transmission data. (Science Daily)
Ocean monster May 28, 2009
"Then it goes through a gamma ray attenuation sensor, measuring the rock density. Then we have a p-wave velocity sensor, measuring the speed of sound through the rock, we sense electrical resistance, susceptibility to magnetism, and the flux of gamma rays coming from the rock itself.". Only after these tests are the cores sawn down the middle - one half destined for further, possibly destructive testing, and the other for a core archive kept in the Japanese city of Kochi. (BBC News -- Science)
Corning Cable Systems to Highlight Leadership in LAN and Data Centre Applications at 2009 DatacenterDynamics in Paris May 26, 2009
Attenuation loss impacts associated with inadvertent macro-bending events may be reduced by more than 50 percent when using Pretium Low-loss OM3 Jumpers with ultra-bendable performance in place of traditional 50 microm jumpers. The exhibit will also contain. (PR Newswire)
Virus Tamed To Destroy Just Cancer Cells May 25, 2009
Cawood R, Chen HH, Carroll F, Bazan-Peregrino M, van Rooijen N, et al. Use of Tissue-Specific MicroRNA to Control Pathology of Wild-Type Adenovirus without Attenuation of Its Ability to Kill Cancer Cells. PLoS Pathog, 5(5): e1000440 DOI. (Science Daily)
TB vaccine gets its groove back May 20, 2009
Two years ago, after the Kernodle group had modified BCG and was beginning to test it for immune responses, researchers at the Institut Pasteur in Paris published a paper describing the genomic evolution of BCG. They found that in addition to containing gene deletions consistent with attenuation of the vaccine, the BCG genome also had regions of gene duplication and increased gene expression. Some of the duplicated and over-expressed genes were for antioxidants already being targeted by the... (EurekAlert!)
Nitrate Stimulates Greenhouse Gas Production In Small Streams Apr 1, 2009
Such management efforts might entail reduced fertilizer application rates to agricultural soils, restoration of the riparian zone for nitrogen attenuation, or modification of tile drains to reduce nitrogen export to streams. Dr. Jake Beaulieu, the lead author of the study, is now a postdoctoral research associate with the Environmental Protection Agency. (Science Daily)
Research to secure a safe water supply Mar 22, 2009
The joint venture aims to test ways of purifying water through natural attenuation using plants. FLOODING. (EurekAlert!)
Underfoot at the Playground -- Smart, Safe Choices Feb 19, 2009
Too often, there are very tall playground structures towering over a surface of sand or pea gravel which does not afford adequate impact attenuation for the fall heights of the equipment nor meet ADA requirements for accessibility. Other times there are wood chips and mulch that are made from a city's wood chipper and dispersed under a playground -- it may offer some impact attenuation but generally has not been tested and can decompose rapidly and can give the children, parents and owner... (Pekin Times, IL)
John Suchet: 'My Bonnie is gone: it's as if she has died' Feb 17, 2009
They share experiences, good and bad, and talk as men about the slow attenuation of their relationships and the loss of intimacy. I am so fortunate. (Telegraph.co.uk)
Feel upset? Writing it down helps you to calm down, scientists say Feb 16, 2009
If you have people actually expressing their negative responses in words while they re being exposed, you see greater attenuation over time. The brain s catharsis centre is a region called the right ventrolateral prefrontal cortex, which lies next to the right temple. (Times Online)
The Anti-ID-Theft Bill That Isn't Feb 8, 2009
This public shaming needs the cooperation of the press and, unfortunately, there's an attenuation effect going on. The first major breach after California passed its disclosure law -- -- was in February 2005, when ChoicePoint sold personal data on 145,000 people to criminals. (Yahoo News -- Online Privacy)
