منابع مشابه
UWB Propagation through Walls
The propagation of ultra wide band (UWB) signals through walls is analyzed. For this propagation studies, it is necessary to consider not only propagation at a single frequency but in the whole band. The UWB radar output signal is formed by both transmitter and antenna. The effects of antenna receiving and transmitting responses for various antenna types (such as small and aperture antennas) ar...
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Acoustic &&breakout'' and &&breakin'' through duct walls had, until the late 1970s, been a rather neglected topic of research, particularly in the "eld of heating, ventilating and air-conditioning ducts. Since then, interest has grown and many publications have appeared in which predictive methods have been reported. Research in this area, especially that which has been conducted over the past ...
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We initiate the study of a fundamental combinatorial problem: Given a capacitated graph G = (V,E), find a shortest walk (“route”) from a source s ∈ V to a destination t ∈ V that includes all vertices specified by a set W ⊆ V : the waypoints. This waypoint routing problem finds immediate applications in the context of modern networked distributed systems. Our main contribution is an exact polyno...
متن کاملWalking through angina.
Many patients know that the amount of physical activity that provokes angina varies throughout the day. Often relatively little effort is enough early on-towelling down after a shower or taking a short walk to the garage or bus stop-whereas later substantially more vigorous exertion may be undertaken without provoking pain. This "first effort angina," or "warming up phenomenon," appears to be r...
متن کاملThrough-Walls Communication for Medical Emergency Services
This paper presents a proposal for an outdoor wearable augmented reality computer system to support collaboration. A key attribute of this system is its ability to use all four time-space configurations for collaboration systems: same time same place, same time – different place, different time same place, and different time different place. The proposed main form of user interaction is the use...
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ژورنال
عنوان ژورنال: Nature Nanotechnology
سال: 2006
ISSN: 1748-3387,1748-3395
DOI: 10.1038/nnano.2006.151