Results 61 to 70 of about 411,389 (202)

Comparison of Triature Doppler Velocimetry and Visar

Journal of Physics: Conference Series, 2010
Triature Photon Doppler Velocimetry (TDV) is an adaptation of Photonic Doppler Velocimetry (PDV) that rejects common-mode data noise after splitting PDV three ways, with each signal 120° out of phase from each other. Testing has demonstrated that the TDV also improves temporal resolution from the typical five-nanoseconds of PDV to a subnanosecond range.
Cenobio H Gallegos, Bruce Marshall, Matthew Teel, Vincent T Romero, Abel Diaz, Michael Berninger   +5 more
openaire   +1 more source

A Video SAR Multi-Target Tracking Algorithm Based on Re-Identification Features and Multi-Stage Data Association

Remote Sensing
Video Synthetic Aperture Radar (ViSAR) operates by continuously monitoring regions of interest to produce sequences of SAR imagery. The detection and tracking of ground-moving targets, through the analysis of their radiation properties and temporal ...
Anxi Yu, Boxu Wei, Wenhao Tong, Zhihua He, Zhen Dong   +4 more
doaj   +1 more source

Suitability of Magnesium Oxide as a VISAR Window [PDF]

AIP Conference Proceedings, 2006
Impedance matching of a velocity interferometer for any reflector (VISAR) window to a material under study helps simplify a shock experiment by effectively allowing one to measure an in situ particle velocity. The shock impedance of magnesium oxide (MgO) falls roughly midway between those of sapphire and LiF, two of the most frequently used VISAR ...
openaire   +1 more source

Red‐listed species under threat: Unexpectedly high deadwood thresholds for their presence in managed boreal forests

Journal of Applied Ecology, Volume 63, Issue 6, June 2026.
We show that deadwood volume is a reliable, taxon‐specific indicator of the presence of red‐listed bryophytes and fungi but not lichens. By explicitly focusing on threatened species and deriving statistically defined thresholds from managed boreal forests, our study provides empirical benchmarks that go beyond commonly used biodiversity indicators. The
Alwin A. Hardenbol, Faith A. M. Jones, Jörgen Sjögren, Albin Larsson Ekström, Anne‐Maarit Hekkala, Mari Jönsson, Matti Koivula, Joachim Strengbom   +7 more
wiley   +1 more source

On the use of crystalline admixtures in cement based construction materials: from porosity reducers to promoters of self healing

, 2016
The project detailed in this paper aims at a thorough characterization of the effects of crystalline admixtures, currently employed as porosity reducing admixtures, on the self-healing capacity of the cementitious composites, i.e.
Moretti, Fabio, Krelani, Visar, FERRARA, LIBERATO   +2 more
core   +1 more source

An Embedded-GPU-Based Scheme for Real-Time Imaging Processing of Unmanned Aerial Vehicle Borne Video Synthetic Aperture Radar

Remote Sensing
The UAV-borne video SAR (ViSAR) imaging system requires miniaturization, low power consumption, high frame rates, and high-resolution real-time imaging.
Tao Yang, Xinyu Zhang, Qingbo Xu, Shuangxi Zhang, Tong Wang   +4 more
doaj   +1 more source

Volcanism at Piton de la Fournaise as an Analog for Chloris Mons, Venus

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Identifying and investigating terrestrial analogs for Venus volcanic activity is necessary to prepare for the planned upcoming missions to Venus. We propose volcanism at Piton de la Fournaise, a frequently active oceanic shield volcano, as an analog to volcanism at Chloris Mons, Venus.
Evan G. K. Cooper, Ian T. W. Flynn, Sean I. Peters, Elliott W. Benson, Sara B. Murphy, Eleanor D. Sterling   +5 more
wiley   +1 more source

全光纤VISAR系统中色散问题的研究

四川大学学报. 自然科学版, 2003
全光纤VISAR进入干涉仪能产生干涉的两光束光程差近似为零 ,是全光纤VISAR测速的前提条件 .对此 ,研究了低输入光功率时 ,单模光纤的色散对全光纤VISAR光程差的影响 ...
张小强, 周昕, 胡绍楼
doaj  

Doing Age and Aged Doings in 10–12‐Year‐Olds' Descriptions of Their Leisure Opportunities

Children &Society, Volume 40, Issue 3, Page 590-599, May 2026.
ABSTRACT The aim of this study is to contribute knowledge about how children aged 10 to 12 describe their leisure time, and how their accounts of what they do, what they want to do, and what they perceive as available to them can be understood in relation to age as a social category.
Lina Lago, Sanna Hedrén
wiley   +1 more source

Design, performance and application of a line-imaging velocity interferometer system for any reflector coupled with a streaked optical pyrometer system at the Shenguang-II upgrade laser facility

High Power Laser Science and Engineering
The velocity interferometer system for any reflector (VISAR) coupled with a streaked optical pyrometer (SOP) system is used as a diagnostic tool in inertial confinement fusion (ICF) experiments involving equations of state and shock timing.
Dawei Yuan, Shaojun Wang, Huigang Wei, Haochen Gu, Yu Dai, Jiayong Zhong, Yutong Li, Gang Zhao, Jie Zhang   +8 more
doaj   +1 more source