Time filter

Source Type

Ymittos Athens, Greece

News Article
Site: http://phys.org/technology-news/

New research led by scientists at Michigan Technological University, along with the National Center for Atmospheric Research (NCAR) and Mainz University, analyzes the mixing of drier air with water-saturated air in clouds using holographic imaging and an airborne laboratory. Raymond Shaw, a Michigan Tech physicist, looks at the smallest part of clouds: droplets. To understand groups of droplets, Shaw and NCAR researchers flew airplanes through fluffy cumulus clouds in Wyoming and Colorado. Aboard the plane, the team took detailed 3-D images with an instrument called the Holographic Detector for Clouds (HOLODEC--after the "Star Trek" holodeck). These particular clouds were made up only of liquid water. The size of the drops is a key part of cloud formation and mixing. The HOLODEC instrument, which is a tube about six inches in diameter and several feet long, samples a cloud volume about the size of a marker and provides unique insight into cloud mixing. Using HOLODEC, the scientists observed clear boundaries--distinct lines between wet and dry air. Credit: NCAR Imagine watching the World Cup or the Super Bowl in 3-D in the comfort of your own home. That option may be available sooner than you think. With support from the National Science Foundation (NSF), optical scientist Nasser Peyghambarian and his team at the University of Arizona are working to make next-generation holograms possible. The researchers foresee the day, possibly within the next decade, when laser-generated holograms will be transmitted anywhere in the world, in real time. Transmitting a video rate hologram takes an enormous amount of bandwidth and power—think 10,000 times the rates for high-definition television. At the Center for Integrated Access Networks (CIAN), the vision is to create transformative technologies for optical access networks that can do just that—transmit huge amounts of data to a broad population anywhere, at any time. The broader impacts of CIAN's research could be felt in almost every home. Ultra-high data bandwidth and cost effective services could contribute to business innovation, improve educational opportunities, enhance distribution of medical services, minimize the environmental impact from infrastructure and pollution, enable new and varied entertainment opportunities, and increase overall national security, just to name a few possibilities. At the Beyond Today's Internet Summit, researchers from the University of Texas at Dallas demonstrated a working prototype of a next generation communication system that uses 3-D video and force feedback devices to virtually recreate a physical therapy session between a patient and a therapist. Three-dimensional models of the two participants are captured using off-the-shelf Microsoft Kinect 3-D Cameras and the models are placed in a shared virtual environment of one's choosing. To simulate the physical touch aspect of a physical therapy session, the researchers used a Haptic force-feedback device, the data from which is also transmitted to and fro, to recreate the experience of resistance in the virtual environment. In the example, the team created a simulation where two individuals practice sawing a log--a task that mimics the rehabilitation movements used by recovering stroke patients. Credit: National Science Foundation

Meliones A.,University of Piraeus | Economou D.,Access Networks | Liverezas I.,Access Networks
Proceedings - 2010 6th International Conference on Intelligent Environments, IE 2010 | Year: 2010

Intelligent environments have been commercially available already over ten years without becoming such a mass product as expected. The expectations of potential users of mentioned solutions have not fulfilled yet due to missing globally accepted standards causing interoperability problems of different hardware and software components, complexity of configuration and use, lack of universal service consideration, and insufficient ROI for private residence owners. Clearly, a stronger emphasis needs to be set on device adaptation, usability and scalability, which can seamlessly accommodate new smart environment services. This paper presents a framework for network adaptation in intelligent environments using OSGi and UPnP technology allowing the uniform and transparent access to devices and services present in the networked environment and supporting the realization of activity spheres across a mixture of heterogeneous networks. The proposed network adaptation framework has been implemented within the ATRACO project and supports an ambient ecology trial hosted in the iSpace in Essex demonstrating a "feeling comfortable with guests" scenario. © 2010 IEEE. Source

Apostolakos S.,Access Networks | Meliones A.,Access Networks | Lykakis G.,Access Networks | Touloupis E.,Access Networks | Vlagoulis V.,Access Networks
International Journal of Parallel Programming | Year: 2010

The telephony world is consistently moving to the transmission of voice through packet networks, so as to unify data and voice and to enable the provisioning of new services in a less costly manner. Service providers are offloading the task of converting analog voice to VoIP to the end-points. In this paper we present an IP-PBX/VoIP Gateway system based on a single, multi-core SoC that performs all the required processing. The system targets the low density market of home gateways and SME IP-PBXs, where cost is the main factor. We prove it is feasible to implement a 4-channel IP-PBX/VoIP gateway on a SoC based purely on both software and hardware provided by the open-source community, reducing both upfront and final product costs thus allowing newplayers into the market. The highly configurable design allows the integration of multiple embedded cores in the same die increasing channel density while reducing clock cycles per channel. The idea of using one or more open-source embedded cores can be extended to many different applications requiring moderate DSP performance, resulting in a "DSP-free", low-cost system, with minimal design effort. © Springer Science+Business Media, LLC 2010. Source

Discover hidden collaborations