Results 61 to 70 of about 301,173 (181)

The Masses of the Milky Way and Andromeda galaxies [PDF]

, 2010
We present a family of robust tracer mass estimators to compute the enclosed mass of galaxy haloes from samples of discrete positional and kinematical data of tracers, such as halo stars, globular clusters and dwarf satellites.
Armandroff, Bahcall, Bellazzini, Bellazzini, Bellazzini, Belokurov, Belokurov, Belokurov, Belokurov, Besla, Binney, Braun, Brunthaler, Brunthaler, Chapman, Cioni, Cole, Coleman, Costa, Crain, Dehnen, Diemand, Evans, Evans, Evans, Evans, Fellhauer, Freedman, Geha, Gottesman, Harris, Heisler, Helmi, Ibata, Ibata, Irwin, Irwin, Jin H. An, Johnston, Kahn, Kalirai, Kaluzny, Karachentsev, Karachentsev, Klypin, Koch, Koch, Koch, Kochanek, Kroupa, Kulessa, Laura L. Watkins, Law, Letarte, Li, Little, Lynden-Bell, Majewski, Martin, Martin, Martin, Martin, Mateo, McConnachie, McConnachie, McConnachie, N. Wyn Evans, Navarro, Nicastro, Piatek, Piatek, Piatek, Piatek, Piatek, Piatek, Queloz, Raychaudhury, Reid, Rohlfs, Sakai, Sales, Saviane, Scholz, Seigar, Simon, Sohn, Van Der Marel, Van Der Marel, Walker, Walker, Walker, White, Wilkinson, Xue, York, Zaritsky, Zucker, Zucker, Zucker, Zucker   +99 more
core   +2 more sources

Non-line-of-sight tracking of people at long range [PDF]

, 2017
A remote-sensing system that can determine the position of hidden objects has applications in many critical real-life scenarios, such as search and rescue missions and safe autonomous driving.
Chan, Susan, Faccio, Daniele, Gariepy, Genevieve, Leach, Jonathan, Warburton, Ryan E.   +4 more
core   +3 more sources

Integrated Analysis of Line-Of-Sight Stability of Off-Axis Three-Mirror Optical System

Photonics
As a space camera works in orbit, the stress rebound caused by gravity inevitably results in the deformation of its optomechanical structure, and the relative position change between different optical components will affect the Line-Of-Sight pointing of ...
Yatao Lu, Bin Sun, Gui Mei, Qinglei Zhao, Zhongshan Wang, Yang Gao, Shuxin Wang   +6 more
doaj   +1 more source

Semi-Definite Programming Relaxation for Non-Line-of-Sight Localization

, 2012
We consider the problem of estimating the locations of a set of points in a k-dimensional euclidean space given a subset of the pairwise distance measurements between the points.
Ekambaram, Venkatesan, Fanti, Giulia, Ramchandran, Kannan   +2 more
core   +1 more source

Achievable directive antenna gain measurements and modeling for 60 GHz indoor links

Scientific Reports
Highly directive antennas may be a key component in millimeter wave links to offset their inherently high path losses. In cluttered scenarios such as Non-Line-Of-Sight (NLOS) indoor settings, antenna gain is degraded by the interaction of the channel ...
Sebastián Bruna, Mauricio Rodríguez, Rodolfo Feick, Francisco Pizarro, Reinaldo Valenzuela, Jinfeng Du, Dmitry Chizhik, Jakub Sapis, Sergio Chapana   +8 more
doaj   +1 more source

Intervening BLR Clouds' Effects on Optical/UV Spectrum [PDF]

, 2012
Recent x-ray observations of Mrk 766 suggest that broad emission line region clouds cross our line of sight and produce variable x-ray absorption. Here we investigate what optical/ultraviolet spectroscopic features would be produced by such "Intervening ...
Arav, Arav, Baldwin, Bentz, Bianchi, Bianchi, Bregman, Chen Hu, Dunn, Elvis, Ferland, Ferland, Ferland, Ferland, Francis, Gary J. Ferland, Gaskell, Gaskell, Hu, Hu, Jian-Min Wang, Korista, Korista, Korista, Mathews, Nardini, Osterbrock, Osterbrock, Osterbrock, Peterson, Pu Du, Puccetti, Ralchenko, Rines, Risaliti, Risaliti, Risaliti, Risaliti, Shakura, Shang, Shields, Smith, Vasudevan, Wang, Wang, Wang, Wang, Ye Wang, Zheng   +48 more
core   +3 more sources

PENGIRIMAN DATA NRF24L01+ DENGAN KONDISI LINE OF SIGHT DAN NON LINE OF SIGHT

Jurnal RESISTOR (Rekayasa Sistem Komputer), 2020
Wireless Sensor Network is a wireless network technology that includes sensor nodes and embedded systems. WSN has several advantages: it is cheaper for large-scale applications, can withstand extreme environments, and data transmission is relatively more stable. One of the WSN devices is nRF24L01+.
I Gusti Made Ngurah Desnanjaya, Mohammad Dwi Alfian   +1 more
openaire   +2 more sources

Uplink Performance Analysis in D2D-Enabled mmWave Cellular Networks

, 2017
In this paper, we provide an analytical framework to analyze the uplink performance of device-to-device (D2D)-enabled millimeter wave (mmWave) cellular networks.
Gursoy, M. Cenk, Turgut, Esma
core   +2 more sources

Retinally stabilized differential resolution television display [PDF]

, 1985
A remote television viewing system employing an eye tracker is disclosed, wherein a small region of the image appears in high resolution, and the remainder of the image appears in low resolution. The eye tracker monitors the position of the viewer's line
Ruoff, C. F., Jr.
core   +1 more source

Non-Line-of-Sight Beacon Identification for Sensor Localization

International Journal of Distributed Sensor Networks, 2012
In recent years, sensors are often deployed to sense the target environment. Besides the sensed environmental information, sensor's position information itself is very important in most cases.
Chunfeng Wan, Akira Mita, Songtao Xue
doaj   +1 more source