Results 91 to 100 of about 28,552 (197)

Joint received signal strength, angle-of-arrival, and time-of-flight positioning [PDF]

open access: yes, 2019
This paper presents a software positioning framework that is able to jointly use measured values of three parameters: the received signal strength, the angle-of-arrival, and the time-of-flight of the wireless signals.
Deprez, Wouter   +4 more
core   +1 more source

Cooperative and Distributed Localization for Wireless Sensor Networks in Multipath Environments

open access: yes, 2011
We consider the problem of sensor localization in a wireless network in a multipath environment, where time and angle of arrival information are available at each sensor.
Leng, Mei   +2 more
core   +1 more source

Dimensionally Resolved Nanostructures of an Atomically Precise and Optically Active 1D van der Waals Helix

open access: yesAdvanced Materials, Volume 38, Issue 8, 6 February 2026.
The ability to grow nanostructures based on inorganic helical crystals with long‐range order will enable a platform to realize physical states that arise from chirality. Herein, it is demonstrated that controlled vapor phase deposition of an atomically precise helical crystal, GaSI, into ultrathin 1D nanowires and quasi‐2D nanoribbons.
Kaitlyn G. Dold   +15 more
wiley   +1 more source

A Stochastic Geometry Framework for LOS/NLOS Propagation in Dense Small Cell Networks

open access: yes, 2015
The need to carry out analytical studies of wireless systems often motivates the usage of simplified models which, despite their tractability, can easily lead to an overestimation of the achievable performance.
Doyle, Linda   +3 more
core   +1 more source

Ferroelectric Fluids for Nonlinear Photonics: Evaluation of Temperature Dependence of Second‐Order Susceptibilities

open access: yesAdvanced Optical Materials, Volume 14, Issue 5, 2 February 2026.
Nonlinear optical susceptibilities of five different materials that exhibit the ferroelectric nematic phase, as well as smectic A ferroelectric phase, are determined. The materials investigated include archetypal molecular architectures as well as mixtures showing room‐temperature ferroelectric phases.
Matija Lovšin   +7 more
wiley   +1 more source

NLO photon parton parametrization

open access: yes, 2005
An NLO photon parton parametrization is presented based on the existing $F_2^ $ measurements from $e^+e^-$ data and the low-$x$ proton structure function from $ep$ interactions. Also included in the extraction of the NLO parton distribution functions are the dijets data coming from $ p \to j_1 + j_2 +X$.
Abramowicz, Halina   +2 more
openaire   +2 more sources

Probing Ultrafast Coherent Bandgap Modulation in Monolayer WSe2 by Nonlinear Optics

open access: yesAdvanced Optical Materials, Volume 14, Issue 5, 2 February 2026.
This work sheds light on how resonant nonlinear optics blursthe line between perturbative and non‐perturbative nonlinear optics. Measured deviationsfrom the quadratic second‐harmonic scaling near the excitonic resonance arisefrom optical Stark and Bloch‐Siegert shifts. The experimental results arefurther underpinned by analytical and numerical analysis
Sebastian Klimmer   +7 more
wiley   +1 more source

A Post-Processing Multipath/NLoS Bias Estimation Method Based on DBSCAN

open access: yesSensors
Positioning based on Global Navigation Satellite Systems (GNSSs) in urban environments always suffers from multipath and Non-Line-of-Sight (NLoS) effects. In such conditions, the GNSS pseudorange measurements can be affected by biases disrupting the GNSS-
Yihan Guo   +3 more
doaj   +1 more source

Protocol‐Agnostic Meta Key Distribution for Encrypted Wireless Communications Enabled by Space‐Time‐Coding Metasurface

open access: yesAdvanced Science, Volume 13, Issue 7, 3 February 2026.
This paper presents a programmable metasurface‐based Meta Key Distribution (MKD) system for secure, protocol‐independent key exchange in indoor wireless settings. By embedding entropy into the wireless channel, it enables lightweight, compatible cryptographic key generation.
Xinyu Li   +7 more
wiley   +1 more source

Indoor Mobile Localization in Wireless Sensor Network under Unknown NLOS Errors

open access: yesInternational Journal of Distributed Sensor Networks, 2013
Localization is one of the key techniques in wireless sensor network. One of the main problems in indoor mobile localization is non-line-of-sight (NLOS) propagation. And the NLOS effects will lead to a large localization error. So the NLOS problem is the
Long Cheng   +3 more
doaj   +1 more source

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