Results 51 to 60 of about 430,234 (233)
Wi-PoS : a low-cost, open source ultra-wideband (UWB) hardware platform with long range sub-GHz backbone [PDF]
, 2019 Ultra-wideband (UWB) localization is one of the most promising approaches for indoor localization due to its accurate positioning capabilities, immunity against multipath fading, and excellent resilience against narrowband interference.
De Poorter, Eli +7 more
core +1 more source
Frontiers in Astronomy and Space SciencesXinjiang Qitai is constructing a 110-m fully steerable radio telescope (QiTai radio Telescope [QTT]) equipped with a phased array feeds (PAF) receiver, which will install the focal plane operating from 0.7 to 1.8 GHz.
Peng Wu +6 more
doaj +1 more source
Performance Assessment and Improvement of Central Receivers Used for Solar Thermal Plants
Energies, 2019 In this work, the energy status and supply plans of Saudi Arabia are discussed with a focus on concentrated solar power (CSP) technologies. Subsequently, optimal designs for a 20 MWe solar power plant external receiver, combined with a 15 h thermal ...
Alhussein Albarbar, Abdullah Arar
doaj +1 more source
The external ears as receiving antennas in echolocating bats [PDF]
The Journal of the Acoustical Society of America, 1982 The external ears of bats appear to vary greatly in size and shape, but they in fact have dimensions specifically related to the structure of sonar sounds in different species. They determine the directionality of hearing and produce cues for vertical target localization.
openaire +1 more source
Miniature implantable instrument measures and transmits heart function data [PDF]
, 1971 Heart diameter is derived from measured transit time of 2.25 MHz ultrasonic pulse between two piezoelectric crystals attached to diametrically opposite heart surfaces.
Lee, R. D.
core +1 more source
Scientific ReportsA scoring system to discriminate between uncomplicated and complicated appendicitis is beneficial to determine the optimal treatment for acute appendicitis.
Mikito Mori +13 more
doaj +1 more source
On the use of thermal conductive focusing for solar concentration enhancement [PDF]
, 2016 © 2016. This version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/We discuss the possibility for solar concentration enhancement via conductive heat transport. Here, we are concerned, as in orthodox
Arias Montenegro, Francisco Javier
core +2 more sources
Ecological Solutions and EvidenceSmartphones are handheld computers and multichannel communication devices that carry an array of sensors and can link with specialist external devices. These powerful tools have an established role in biological recording and ecological surveying.
Andrew Osborne +3 more
doaj +1 more source
IEEE Access, 2021 Simultaneous wireless information and power transfer (SWIPT) presents a genuine opportunity toward achieving sustainable low-energy wireless devices. This paper introduces a receiver design for an energy harvesting sensor node (SN).
Amar Esse +3 more
doaj +1 more source
Miniature modular microwave end-to-end receiver [PDF]
, 1993 An end-to-end microwave receiver system contained in a single miniature hybrid package mounted on a single heatsink is presented. It includes an input end connected to a microwave receiver antenna and an output end which produces a digital count ...
Cooley, Thomas W. +3 more
core +1 more source