نتایج جستجو برای: global positioning systems

تعداد نتایج: 1594635  

Journal: :Transportation Research Record: Journal of the Transportation Research Board 2009

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2010
Ferdinando Urbano Francesca Cagnacci Clément Calenge Holger Dettki Alison Cameron Markus Neteler

To date, the processing of wildlife location data has relied on a diversity of software and file formats. Data management and the following spatial and statistical analyses were undertaken in multiple steps, involving many time-consuming importing/exporting phases. Recent technological advancements in tracking systems have made large, continuous, high-frequency datasets of wildlife behavioural ...

2014
André SEACK Jan KAYS Christian REHTANZ

Being subject of historic growth and focusing on the load supply in the past, only few low voltage grid models are available for research purposes. Due to energy system changes with large amounts of renewable feed-in being redistributed within these grids, it becomes more important to create a reliable data basis to evaluate innovative control approaches. Facing this lack of data, in this paper...

Journal: :Journal of strength and conditioning research 2014
Nathan Elsworthy Darren Burke Brendan R Scott Christopher J Stevens Ben J Dascombe

This study examined the physical and decision-making requirements of elite Australian football (AF) umpires during match play. Twenty-nine field umpires were assessed across 20 AF League matches. Physical demands were monitored using global positioning system devices to record the total distance covered and high-speed running (HSR; >14.4 km·h) demands across each quarter. Decision-making perfor...

Journal: :Anais da Academia Brasileira de Ciencias 2008
Mushtaq Ahmed Daniel V Magalhães Aida Bebeachibuli Stella T Müller Renato F Alves Tiago A Ortega John Weiner Vanderlei S Bagnato

Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past four decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. ...

2016
Graham K Taylor Kate V Reynolds Adrian L R Thomas

Here, we analyse the energetics, performance and optimization of flight in a moving atmosphere. We begin by deriving a succinct expression describing all of the mechanical energy flows associated with gliding, dynamic soaring and thermal soaring, which we use to explore the optimization of gliding in an arbitrary wind. We use this optimization to revisit the classical theory of the glide polar,...

Journal: :International journal of environmental research and public health 2015
Michelle Takemoto Jordan A Carlson Kevin Moran Suneeta Godbole Katie Crist Jacqueline Kerr

This study used objective Global Positioning Systems (GPS) to investigate the relationship between pedestrian and vehicle trips to physical, cognitive, and psychological functioning in older adults living in retirement communities. Older adults (N = 279; mean age = 83 ± 6 years) wore a GPS and accelerometer for 6 days. Participants completed standard health measures. The Personal Activity and L...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Junmeng Zhao Xiaohui Yuan Hongbing Liu Prakash Kumar Shunping Pei Rainer Kind Zhongjie Zhang Jiwen Teng Lin Ding Xing Gao Qiang Xu Wei Wang

The fate of the colliding Indian and Asian tectonic plates below the Tibetan high plateau may be visualized by, in addition to seismic tomography, mapping the deep seismic discontinuities, like the crust-mantle boundary (Moho), the lithosphere-asthenosphere boundary (LAB), or the discontinuities at 410 and 660 km depth. We herein present observations of seismic discontinuities with the P and S ...

2012
Yuta Mitsui Kosuke Heki

Day-scale Earth's free oscillation after large earthquakes has been detected by underground instruments such as strainmeters, gravimeters and seismometers, to investigate Earth's internal structure, geodynamics, and source properties of earthquakes. Here we show that Global Positioning System (GPS) can also detect the signals of the Earth's free oscillation. A dense GPS array in Japan (GEONET) ...

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