Results 211 to 220 of about 544,023 (260)
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Journal of Theoretical Biology, 2008
Metabolic control analysis (MCA) has become what it is, largely because the special organization of living cells led to rather specific questions. These questions focused on the role of enzymes, genes, and, in subsequent generalizations, on well-defined process activities.
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Metabolic control analysis (MCA) has become what it is, largely because the special organization of living cells led to rather specific questions. These questions focused on the role of enzymes, genes, and, in subsequent generalizations, on well-defined process activities.
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Localization using signal strength
Proceedings of the first ACM international workshop on Mobile entity localization and tracking in GPS-less environments, 2008Received Signal Strength (RSS) data collected within a wireless network can be used to obtain either range estimates or connectivity information. Both approaches lead to localization schemes that require no additional hardware. It is not clear, however, when a range-based scheme should be used in favor of a connectivity-based one.
Gianni Giorgetti +2 more
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Geolocation From Received Signal Strength
2018 52nd Asilomar Conference on Signals, Systems, and Computers, 2018Radio frequency transmitter geolocation has been addressed by many techniques. The approach presented in this paper uses received signal strength measurements to estimate transmitter locations, which can be obtained with relatively simple hardware. Several algorithms are described that do received signal strength-based geolocation and are tested on ...
Sam Whiting +2 more
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Differential signal strength fingerprinting revisited
2014 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 2014The provision of reliable location estimates in WiFi fingerprinting localization is challenging, mainly because users typically carry heterogeneous devices that report Received Signal Strength (RSS) measurements from surrounding Access Points (AP) very differently.
Laoudias, C. +5 more
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2018
In radio positioning, five basic signal parameters have been widely considered for position determination, namely signal strength, time-of-arrival, frequency difference-of-arrival, carrier phase, and angle-of-arrival. Each of these methods have different strengths and weaknesses, so in general there must be a tradeoff between complexity, the associated
Ian Sharp, Kegen Yu
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In radio positioning, five basic signal parameters have been widely considered for position determination, namely signal strength, time-of-arrival, frequency difference-of-arrival, carrier phase, and angle-of-arrival. Each of these methods have different strengths and weaknesses, so in general there must be a tradeoff between complexity, the associated
Ian Sharp, Kegen Yu
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TCR Signal Strength and T Cell Development
Annual Review of Cell and Developmental Biology, 2016Thymocyte selection involves the positive and negative selection of the repertoire of T cell receptors (TCRs) such that the organism does not suffer autoimmunity, yet has the benefit of the ability to recognize any invading pathogen. The signal transduced through the TCR is translated into a number of different signaling cascades that result in ...
Gascoigne, N +3 more
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Signal Strength Variations of Satellite Signals
Nature, 1964RECORDINGS of the strength of the 54-Mc/s radio beacon transmission from the satellite 1961 o1, Transit 4A, have been made at Moore's Valley, Wellington, New Zealand (41° 17′ S., 174° 47′ E.), and at Campbell Island (52° 30′ S., 169° 0′ E.). The signals received on a horizontal half-wave dipole have often been seen to exhibit a quasi-periodic type of ...
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A Comparison of Signal Strength Localization Methods with Sigfox
2018 15th Workshop on Positioning, Navigation and Communications (WPNC), 2018Location-based services play an important role in Internet of Things (IoT) applications. However, a trade-off has to be made between the location estimation error and the battery lifetime of an IoT device. As IoT devices communicate over Low Power Wide Area Networks (LPWAN), signal strength localization methods can use the existing communication link ...
Michiel Aernouts +3 more
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Signal strength prediction in built-up areas. Part 1: Median signal strength
IEE Proceedings F Communications, Radar and Signal Processing, 1983Field trials in London between an elevated base station and a mobile moving in the city streets have produced a propagation data base at frequencies between 168 and 900 MHz. Various important parameters such as range, frequency and relative height, together with quantitative measures of the extent of urbanisation, have been used in conjunction with the
M.F. Ibrahim, J.D. Parsons
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On Measurement of Signal Strength
Proceedings of the IRE, 1919The "shunted telephone" method of measuring audibility of received signals is discussed, and it is shown that the audibility factor as usually calculated, may vary widely from the true strength ratio. This is true whether shunted resistance or shunted impedance is taken as the basis of calculation.
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