PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Researchers boost efficiency of multi-hop wireless networks

2012-04-21
(Press-News.org) Multi-hop wireless networks can provide data access for large and unconventional spaces, but they have long faced significant limits on the amount of data they can transmit. Now researchers from North Carolina State University have developed a more efficient data transmission approach that can boost the amount of data the networks can transmit by 20 to 80 percent.

"Our approach increases the average amount of data that can be transmitted within the network by at least 20 percent for networks with randomly placed nodes – and up to 80 percent if the nodes are positioned in clusters within the network," says Dr. Rudra Dutta, an associate professor of computer science at NC State and co-author of a paper on the research. The approach also makes the network more energy efficient, which can extend the lifetime of the network if the nodes are battery-powered.

Multi-hop wireless networks utilize multiple wireless nodes to provide coverage to a large area by forwarding and receiving data wirelessly between the nodes. However, these networks have "hot spots" – places in the network where multiple wireless transmissions can interfere with each other. This limits how quickly the network can transfer data, because the nodes have to take turns transmitting data at these congested points.

Data can be transmitted at low power over short distances, which limits the degree of interference with other nodes. But this approach means that the data may have to be transmitted through many nodes before reaching its final destination. Or, data can be transmitted at high power, which means the data can be sent further and more quickly – but the powerful transmission may interfere with transmissions from many other nodes.

Dutta and Ph.D. student Parth Pathak developed an approach called centrality-based power control to address the problem. Their approach uses an algorithm that instructs each node in the network on how much power to use for each transmission depending on its final destination.

The algorithm optimizes system efficiency by determining when a powerful transmission is worth the added signal disruption, and when less powerful transmissions are needed.

The paper, "Centrality-based power control for hot-spot mitigation in multi-hop wireless networks," is published online by the journal Computer Communications, and is in press for a print version of an upcoming issue of the journal. Pathak is lead author. The research was supported in part by the U.S. Army Research Office.

INFORMATION:

END



ELSE PRESS RELEASES FROM THIS DATE:

Prior Lake Children's Dentist Offers New Technology for Increased Care

2012-04-21
To ensure top of the line technology for increased patient care, Dr. Tom Morgan, Prior Lake children's dentist, of Babcock and Morgan Family Dentistry is pleased to offer 3D x-rays. With the introduction of 3D x-rays to Babcock and Morgan Family Dentistry, Drs. Michael Babcock and Tom Morgan can take 3D x-ray images of the face and jaws in an affordable manner to the patient. This technology is traditionally only found in hospitals or medical radiology offices, but Dr. Morgan, children's dentist in Prior Lake, is honored to offer this innovative technology at Babcock ...

A study points to the importance of seeking new pine varieties resistant to climate change

2012-04-21
The radiata pine is the tree species par excellence in the Basque Country's forests. Like other types of pine, the lack of water is one of the factors having the greatest effect on its survival and productivity. Until now, the Basque Country's high, steady rainfall has encouraged the cultivation and good productivity of this species. This situation could change over the coming years if, in line with the predictions of climate change, average temperatures rise and droughts become more frequent and intense. So, new varieties of the radiata pine that are more resistant to ...

New coating for hip implants could prevent premature failure

2012-04-21
CAMBRIDGE, Mass. — Every year, more than a million Americans receive an artificial hip or knee prosthesis. Such implants are designed to last many years, but in about 17 percent of patients who receive a total joint replacement, the implant eventually loosens and has to be replaced early, which can cause dangerous complications for elderly patients. To help minimize these burdensome operations, a team of MIT chemical engineers has developed a new coating for implants that could help them better adhere to the patient's bone, preventing premature failure. "This would ...

Brookfield Family Dentist Encourages Patients to Leave Reviews of Their Dental Experience

2012-04-21
To maintain quality dental health care, Dr. Kevin Kuffel, Brookfield family dentist, invites patients to leave reviews via popular search engines - Google and Yahoo! By leaving reviews, patients further help Dr. Kuffel maintain a dental office that meets their every need. "We always look forward to hearing from our patients, and by leaving reviews they can help us to be the best dental team we can be. When our patients leave reviews, they do not go overlooked. We value each review and take into consideration their experience. We hope to further expand our practice ...

Safe sleep environments key to preventing many infant deaths, MU researcher says

Safe sleep environments key to preventing many infant deaths, MU researcher says
2012-04-21
COLUMBIA, Mo. – Since 1992, the government's Back-to-Sleep Campaign has encouraged parents to place infants on their backs to sleep. Still, more than 4,500 infants die unexpectedly during sleep each year in the United States. Now, a University of Missouri injury prevention researcher says that safe, separate sleep environments for infants are critical to preventing sudden unexpected infant deaths (SUIDs). "Many of these SUIDs are due to unsafe sleep environments, and these deaths are totally preventable," said Patricia Schnitzer, an associate professor in the MU Sinclair ...

Beyond the blue bins: New American Chemical Society video on recycling

2012-04-21
WASHINGTON, April 19, 2012 — Just in time for Sunday's celebration of Earth Day, the American Chemical Society (ACS) today released a video revealing the journey that recyclable materials take beyond those blue curbside bins. In the latest episode of ACS' award-winning Bytesize Science series, viewers take a tour of a typical recycling center to see how these facilities sort the mountains of recyclables they receive every day. The video is available at www.BytesizeScience.com. It points out that the average American generates about 4.5 pounds of trash every day. That's ...

The solar cell that also shines: Luminescent 'LED-type' design breaks efficiency record

The solar cell that also shines: Luminescent LED-type design breaks efficiency record
2012-04-21
WASHINGTON, April 19—To produce the maximum amount of energy, solar cells are designed to absorb as much light from the Sun as possible. Now researchers from the University of California, Berkeley, have suggested – and demonstrated – a counterintuitive concept: solar cells should be designed to be more like LEDs, able to emit light as well as absorb it. The Berkeley team will present its findings at the Conference on Lasers and Electro Optics (CLEO: 2012), to be held May 6-11 in San Jose, Calif. "What we demonstrated is that the better a solar cell is at emitting photons, ...

Dentist in Lauderhill, FL Brings Awareness to Oral Cancer During the Month of April

2012-04-21
With an estimated 36, 540 people diagnosed with oral cancer in 2010, the Oral Cancer Foundation has made April oral cancer awareness month. Dr. Robert Getz, dentist in Lauderhill, FL, joins dentists from all over the country to bring further awareness to this life-threatening disease. "Oral cancer screening is a routine part of a dental examination. Regular checkups, including an examination of the entire month, are essential in the early detection of cancerous and pre-cancerous conditions," stated Dr. Robert Getz, Lauderhill, FL dentist. "Even though ...

Georgia Tech researchers address bus bunching

Georgia Tech researchers address bus bunching
2012-04-21
As any city dweller knows, buses are rarely on time. It's typical to wait a while, only to have several buses show up one after another – a phenomenon known as bus bunching. Fortunately, researchers and students at the Georgia Institute of Technology have developed a possible solution for bus bunching that provides better service to riders, simplifies the job of drivers and reduces work for management. Industrial & Systems Engineering Professor John Bartholdi and Georgia Tech alumnus Don Eisenstein (MS IE 1983, PhD IE 1992), a colleague from the University of Chicago, ...

Swallowing exercises can help patients with head and neck cancer

2012-04-21
Mount Sinai School of Medicine researchers have found that targeted swallowing exercises can help alleviate swallowing dysfunction – a debilitating side effect in people undergoing chemoradiation therapy (CRT) for head and neck cancer. The study, published in the April issue of Archives of Otolaryngology – Head & Neck Surgery, a JAMA Network publication, suggests that clinicians should consider giving all patients undergoing CRT an exercise regimen to improve their quality of life after treatment. "This study provides clear evidence that aggressive swallowing therapy ...

LAST 30 PRESS RELEASES:

Parents of children with health conditions less confident about a positive school year

New guideline standardizes consent for research participants in Canada

Research as reconciliation: Oil sands and health

AI risks overwriting history and the skills of historians have never been more important, leading academic outlines in new paper

The Lancet Diabetes & Endocrinology: Higher doses of semaglutide can safely enhance weight loss and improve health for adults living with obesity, two new clinical trials confirm

Trauma focused therapy shows promise for children struggling with PTSD

School meals could drive economic growth and food system transformation

Home training for cerebellar ataxias

Dry eyes affect over half the general population, yet only a fifth receive diagnosis and treatment

Researchers sound warning about women with type 2 diabetes taking oral HRT

Overweight and obesity don’t always increase the risk of an early death, Danish study finds

Cannabis use associated with a quadrupling of risk of developing type 2 diabetes, finds study of over 4 million adults

Gestational diabetes linked to cognitive decline in mothers and increased risk of developmental delays, ADHD and autism among children

Could we use eye drops instead of reading glasses as we age?

Patients who had cataracts removed or their eyesight corrected with a new type of lens have good vision over all distances without spectacles

AI can spot which patients need treatment to prevent vision loss in young adults

Half of people stop taking popular weight-loss drug within a year, national study finds

Links between diabetes and depression are similar across Europe, study of over-50s in 18 countries finds

Smoking increases the risk of type 2 diabetes, regardless of its characteristics

Scientists trace origins of now extinct plant population from volcanically active Nishinoshima

AI algorithm based on routine mammogram + age can predict women’s major cardiovascular disease risk

New hurdle seen to prostate screening: primary-care docs

MSU researchers explore how virtual sports aid mental health

Working together, cells extend their senses

Cheese fungi help unlock secrets of evolution

Researchers find brain region that fuels compulsive drinking

Mental health effects of exposure to firearm violence persist long after direct exposure

Research identifies immune response that controls Oropouche infection and prevents neurological damage

University of Cincinnati, Kent State University awarded $3M by NSF to share research resources

Ancient DNA reveals deeply complex Mastodon family and repeated migrations driven by climate change

[Press-News.org] Researchers boost efficiency of multi-hop wireless networks