Results 231 to 240 of about 2,749,924 (279)

Accuracy of position detection using a position-sensitive detector

IEEE Transactions on Instrumentation and Measurement, 1998
Position-sensitive detectors (PSD) provide four current outputs that are proportional to the two-dimensional center of mass of a light spot impinging on the face of the detector. This characteristic permits the PSD to be used for sensing the position of a light source.
Peter Schaefer, Ronald D. Williams, G. Kirk Davis, Robert A. Ross   +3 more
openaire   +2 more sources

Distance and positioning accuracy for robotic manipulators

Proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS'94), 2002
This research concerns the relationship between distance accuracy and positioning accuracy for robotic manipulators. We propose an approach for calibration and verification of the positioning accuracy based on a polynomial approximation to the workspace.
Xuecai Zhou, Qixian Zhang, William A. Gruver, Gongliang Guo   +3 more
openaire   +2 more sources

Positional Accuracy of Two Methods of Geocoding

Epidemiology, 2005
Geocoding is often used in epidemiologic studies to map residences with geographic information systems (GIS). The accuracy of the method is usually not determined.We collected global positioning system (GPS) measurements at homes in a case-control study of non-Hodgkin lymphoma in Iowa. We geocoded the addresses by 2 methods: (1) in-house, using ArcView
Mary H, Ward, John R, Nuckols, James, Giglierano, Matthew R, Bonner, Calvin, Wolter, Matthew, Airola, Wende, Mix, Joanne S, Colt, Patricia, Hartge   +8 more
openaire   +2 more sources

Effect of distance metrics on positioning accuracy

2018 26th Signal Processing and Communications Applications Conference (SIU), 2018
RF fingerprinting based positioning systems have come to the forefront among indoor positioning systems as they provide both high precision and can use existing infrastructure like Wi-Fi access points effectively. In this study, an architecture that constructs the RF signal map of the environment in real-time is proposed.
Umut Can Altin, Nuray At, Cihan Topal
openaire   +1 more source

Fundamental Limits in the Accuracy of Wireless Positioning

2012
Peer ...
BACCI, GIACOMO, P. Closas, D'AMICO, ANTONIO ALBERTO, D. Dardari, C. Fernández Prades, D. Fontanella, S. Gezici, LUISE, MARCO, A. Mallat, MENGALI, UMBERTO, M. Nájar, M. Nicoli, C. Oestges, L. Vanderdorpe   +13 more
openaire   +4 more sources

Accuracy of maxillary positioning in bimaxillary surgery

British Journal of Oral and Maxillofacial Surgery, 2009
The aim of the study was to investigate the accuracy of a modified pin system for the vertical control of maxillary repositioning in bimaxillary osteotomies. The preoperative cephalograms of 239 consecutive patients who were to have bimaxillary osteotomies were superimposed on the postoperative films.
W B, Kretschmer, W, Zoder, G, Baciut, Mihaela, Bacuit, K, Wangerin   +4 more
openaire   +2 more sources

Enhancing Accuracy Performance of Bluetooth Positioning

2007 IEEE Wireless Communications and Networking Conference, 2007
Huge popularity of mobile devices and Internet open new application field of wireless positioning and navigation systems, and this integration also brings new research issues. Currently the positioning and navigation systems are mostly based on satellite positioning systems, such as GPS.
Le Thanh Son, Pål Orten
openaire   +1 more source

LTE Positioning Accuracy Performance Evaluation

2015
In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in Long Term Evolution (LTE) networks using dedicated positioning reference signal (PRS) by means of comprehensive simulation model.
Mstislav Sivers, Grigoriy Fokin
openaire   +1 more source

Accuracy of Patient Positioning in Mantle Field Irradiation

Medical Dosimetry, 1992
A prospective study of the accuracy of patient positioning in mantle field irradiation was carried out in 13 lymphoma patients treated with curative radiotherapy. Patients were treated in the supine and prone position for anterior and posterior fields, respectively.
C L, Creutzberg, A G, Visser, P M, De Porre, J H, Meerwaldt, V G, Althof, P C, Levendag   +5 more
openaire   +2 more sources

Accuracy of Stereotaxic Positioning of Transcranial Magnetic Stimulation

Brain Topography, 2005
In cognitive neuroscience, optically tracked frameless stereotaxic navigation has been successfully used to precisely guide transcranial magnetic stimulation (TMS) to desired cortical areas for brain-mapping purposes. Thereby, potential sources of imprecision are the fixation of a reference frame to the head of the subject and the referencing procedure
Schönfeldt-Lecuona, C, Thielscher, A, Freudenmann, R W, Kron, M, Spitzer, M, Herwig, U   +5 more
openaire   +2 more sources