Results 21 to 30 of about 419,970 (292)
Device Discovery in D2D Communication: A Survey
IEEE Access, 2019 Device to Device (D2D) communication was first considered in out-band to manage energy issues in the wireless sensor networks. The primary target was to secure information about system topology for successive communication.
Omar Hayat +5 more
doaj +1 more source
Modeling, synthesis, and characterization of thin film copper oxide for solar cells [PDF]
, 2009 The modeling, growth, and characterization of Copper Oxide thin films for solar cell applications are reported. Cu_2O has several attractive properties which include its direct band gap (Eg=2.17 eV) for use in photoelectrolysis of water and use in ...
Atwater, Harry A., Darvish, Davis S.
core +1 more source
Multi-band asymmetric piezoelectric MEMS microphone inspired by the Ormia Ochracea [PDF]
, 2016 A multi-band piezoelectric directional MEMS microphone is demonstrated based on a bio-mimetic design inspired by the parasitoid fly Ormia ochracea, using the PiezoMUMPs multi-user foundry process.
Bauer, Ralf +3 more
core +1 more source
Reconfigurable multi-band, graphene-based THz absorber: Circuit model approach
Results in Physics, 2020 Using dual bias for a single graphene layer a multi-layer THz absorber is proposed. An exclusive circuit representation is derived and a two-layer structure is investigated as a reconfigurable multi-narrow band absorber.
Toktam Aghaee, Ali A. Orouji
doaj +1 more source
Partially-disordered photonic-crystal thin films for enhanced and robust photovoltaics [PDF]
, 2012 We present a general framework for the design of thin-film photovoltaics based on a partially-disordered photonic crystal that has both enhanced absorption for light trapping and reduced sensitivity to the angle and polarization of incident radiation ...
Favuzzi, Pedro A. +5 more
core +2 more sources
Relay Probing for Millimeter Wave Multi-Hop D2D Networks
IEEE Access, 2020 The communications in the millimeter wave (mmWave) band, e.g., WiGig (60 GHz), is considered as one of the main components of 5G and beyond 5G (B5G) networks.
Ehab Mahmoud Mohamed +5 more
doaj +1 more source
Investigation Of Device For Geophysical Exploration At Shallow Depth [PDF]
, 2017 The article presents the results of the development of the echolocation device for geophysical exploration at shallow depth. The principle of operation, block diagram and time diagrams of the echolocation device for geophysical exploration at shallow ...
Kuldashev, O. (Obbozzhon) +1 more
core +2 more sources
IEEE Access, 2018 In this paper, a new 3-D electromagnetic (EM) simulation approach for heterojunction bipolar transistor (HBT) parameter extraction in terahertz band is presented.
Yapei Chen +7 more
doaj +1 more source
Efficient Exploitation of Radio Frequency and Visible Light Communication Bands for D2D in Mobile Networks [PDF]
, 2019 The concept of device-to-device (D2D) communication, combining common radio frequency (RF) and visible light communication (VLC), is seen as a feasible way how to cope with spectrum crunch in the RF domain and how to maximize spectral efficiency in ...
Bečvář Z. +4 more
core +1 more source
Photoresponsive Piezoelectrics
Frontiers in Materials, 2021 Most piezoelectric materials are not interactive with visible light, meaning that their band gaps are beyond the photon energies of the visible part of the light spectrum.
Yang Bai
doaj +1 more source