Results 251 to 260 of about 229,309 (277)
Some of the next articles are maybe not open access.
Passive Immunization against the Local Shwartzman Reaction
The Journal of Immunology, 1972Abstract Passive immunization with rabbit antiserum to endotoxin prevented the Shwartzman reaction due to homologous and heterologous endotoxins. Homologous protection lasted at least 1 month, was conferred with the 19S fraction, and was accompanied by accelerated clearance of radioactive endotoxin from the circulating blood ...
A I, Braude, H, Douglas
openaire +2 more sources
Manatee position estimation by passive acoustic localization
The Journal of the Acoustical Society of America, 2007Passive sound source localization with sensor arrays is based on the estimation of the time difference of arrival (TDOA), and precise TDOA is required to achieve accurate position estimation. For a majority of practical localization systems (based on TDOA estimation with four sensors in two dimensions), only three time delays are computed to determine ...
Paulin Buaka, Muanke +1 more
openaire +2 more sources
Passive localization from Doppler shifted frequency measurements
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991An efficient search scheme for an underwater radiating source is developed by introducing intermediate variables which are products of some of the unknowns. The search dimension is only two, in x-y position, instead of five. The resultant intermediate equations become linear and are easier to solve; the major calculation at each grid point requires an ...
Y.T. Chan, J.J. Towers
openaire +1 more source
Subarray processing for passive radar localization
2017 IEEE Radar Conference (RadarConf), 2017The addition of an array to a passive radar increases the possible ways to process data for different purposes. The digital beamforming capability, used in a passive radar environment with multiple transmitters and geometries, can be used to increase gain in a particular direction, reduce signal interference in another, or to estimate the direction of ...
Jamie H. Huang +3 more
openaire +1 more source
Scan-based emitter passive localization
IEEE Transactions on Aerospace and Electronic Systems, 2007This paper investigates the problem of estimating the position of a scanning emitter using a passive scan-based geolocation technique. This is achieved by taking advantage of the geometric constraints introduced by the uniform rotating motion of the antenna main beam as it sweeps across a number of separate receivers.
openaire +1 more source
Localization Systems Using Passive UHF RFID
2009 Fifth International Joint Conference on INC, IMS and IDC, 2009Since gathering spatial information of objects often provides a large number of extended functions in RFID based applications, many different localization systems have been developed in recent years. Determining and estimating the physical location of tagged objects in an interrogating area is known as localization.
Jae Sung Choi +3 more
openaire +1 more source
Array based passive radar target localization
2016 IEEE Radar Conference (RadarConf), 2016In this paper, a procedure for target localization with digital television based passive radar is developed. Considerations for beamforming, including array calibration and range-Doppler processing are presented, which establish a comprehensive framework for determining the 3D position of a target in space.
Jamie H. Huang +3 more
openaire +1 more source
Challenges of passive infrared indoor localization
2008 5th Workshop on Positioning, Navigation and Communication, 2008In this paper a new approach for locating people indoors is proposed. Since location based services become relevant for an increasing number of people, e. g. the location dependent automatic control of lighting, there is a need for unobtrusive and easy to use location systems.
Jurgen Kemper, Holger Linde
openaire +1 more source
UAV Path Planning for Passive Emitter Localization
IEEE Transactions on Aerospace and Electronic Systems, 2012A path planning algorithm is presented for uninhabited aerial vehicles (UAVs) trying to geolocate an emitter using passive payload sensors. The objective is to generate a sequence of waypoints for each vehicle that minimizes localization uncertainty.
openaire +2 more sources
Indoor localization with passive sensors
2013In this thesis, a framework is described that is designed to perform indoor localization in the Smart Condo (TM). A significant aspect of the framework is that it mainly operates on the basis of binary sensors - including motion sensors and occupancy sensors - and it primarily involves geometric computations.
openaire +1 more source