Results 101 to 110 of about 895,042 (230)

Distributed localization of a RF target in NLOS environments

, 2014
We propose a novel distributed expectation maximization (EM) method for non-cooperative RF device localization using a wireless sensor network. We consider the scenario where few or no sensors receive line-of-sight signals from the target. In the case of
Leng, Mei, Quitin, Francois, Razul, Sirajudeen G., Tay, Wee Peng, Xu, Wenjie   +4 more
core   +1 more source

US Contrast Agent Arrival Time Difference Ratio for Benign versus Malignant Subpleural Pulmonary Lesions

, 2021
Ke Bi, Rui-Rui Zhou, Yi Zhang, Mengjun Shen, Hongwei Chen, Yang Cong, Hui-ming Zhu, Chunhong Tang, Jing Yuan, Yin Wang   +9 more
openalex   +1 more source

Performance Analysis for Time Difference of Arrival Localization in Long-Range Networks

Smart Cities
LoRa technology is a recent technology belonging to the Low Power and Wide Area Networks (LPWANs), which offers distinct advantages for wireless communications and possesses unique features.
Ioannis Daramouskas, Isidoros Perikos, Michael Paraskevas, Vaios Lappas, Vaggelis Kapoulas   +4 more
doaj   +1 more source

Valuation of uncertainty in travel time and arrival time - some findings from a choice experiment [PDF]

We are developing a dynamic modeling framework in which we can evaluate the effects of different road pricing measures on individual choice behavior as well as on a network level.
Dirk Van Amelsfort, Michiel Bliemer
core  

Puzzles in Time Delay and Fermat Principle in Gravitational Lensing [PDF]

, 2011
The current standard time delay formula (CSTD) in gravitational lensing and its claimed relation to the lens equation through Fermat's principle (least time principle) have been puzzling to the author for some time.
Rhie, Sun Hong
core  

Connecting speeds, directions and arrival times of 22 coronal mass ejections from the Sun to 1 AU

, 2014
Forecasting the in situ properties of coronal mass ejections (CMEs) from remote images is expected to strongly enhance predictions of space weather, and is of general interest for studying the interaction of CMEs with planetary environments. We study the
Amla, K., Colaninno, R. C., Davies, J. A., De Jong, E. M., Farrugia, C. J., Galvin, A. B., Hall, J. R., Harrison, R. A., Liewer, P. C., Liu, Y. D., Lugaz, N., Luhmann, J. G., Möstl, C., Peinhart, V., Rollett, T., Temmer, M., Veronig, A. M., Vršnak, B.   +17 more
core   +1 more source

Real-time time difference of arrival estimation for moving wideband acoustic sources [PDF]

, 2016
Alexander Sedunov
openalex   +1 more source

On the spontaneous breaking of Lorentz invariance

, 2000
We show that estimates of the Lorentz symmetry violation extracted from ultra-high energy cosmic rays beyond the GZK cut-off set bounds on the parameters of a Lorentz-violating extension of the Standard Model.
Amelino-Camelia, Bell, Bell, Bertolami, Bertolami, Bertolami, Bertolami, Bird, Bird, Bird, Bluhm, Bluhm, Bluhm, Brillet, Brucker, Carroll, Carroll, Coleman, Coleman, Colladay, Colladay, Colladay, Colladay, Drever, Efimov, Gaisser, Glashow, Greisen, Halzen, Hayashida, Hughes, Kostelecký, Kostelecký, Kostelecký, Kostelecký, Kostelecký, Kostelecký, Lamoreaux, Lawrence, Mannheim, Nielsen, Orfeu Bertolami, Phillips, Takeda, Waxman, Weinberg, Witten, Zatsepin   +47 more
core   +2 more sources

A Decisive test to confirm or rule out the existence of dark matter emulators using gravitational wave observations

, 2008
We consider stable modified theories of gravity that reproduce galactic rotation curves and the observed amount of weak lensing without dark matter. In any such model gravity waves follow a different geodesic from that of other massless particles.
Kahya, E. O.
core   +1 more source

Indoor positioning in 5G new radio: how it works, status quo of research, and the road ahead

ICT Express
In this paper, the architecture and mechanism of 5G New Radio indoor positioning schemes such as downlink time difference of arrival (DL-TDOA), uplink (UL) TDOA, multiple-cell round trip time (Multi-RTT), DL angle of departure, UL angle of arrival (AOA),
Jiaqi Li, Seung-Hoon Hwang
doaj   +1 more source