Results 131 to 140 of about 655,319 (295)
Demo 09-28 Rubber Tube Standing Waves
, 2001 A variable frequency motor is used to vibrate the end of a long rubber tube, creating standing waves, as seen in Figure 1 for the third harmonic mode.
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Concealed explosives detection using swept millimetre waves [PDF]
, 2012 The aim of this project is to develop a system for the stand-o detection (typically ten metres) of concealed body-worn explosives. The system must be capable of detecting a layer of explosive material hidden under clothing and distinguishing explosives ...
Smith, Sarah Elizabeth
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Advanced Functional Materials, EarlyView.Rapid microwave plasma torch engineering tunes crystal phases, carbon graphitization and oxygen‐vacancy defects in HfO2/C@C core‐shell fibrous membranes. Synergistic multi‐loss effects optimize impedance matching to deliver −65.75 dB reflection loss and a 7.37 GHz effective bandwidth for flexible electromagnetic wave absorption.
Qichao Ding +14 more
wiley +1 more source
A New Optical Signal Distribution Method for Phased Array Antennas at Millimetre Waves
, 1999 The optical beam forming of phased array antennas is a very promising technique because of the advantages of the fibre optic signal transmission and the optical control of microwave monolithic integrated circuits (MMICs).
Berceli, Tibor +6 more
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Ground‐State Charge‐Transfer Doping in Donor–Acceptor Semiconducting Polymers
Advanced Functional Materials, EarlyView.This work demonstrates controlled ground‐state charge‐transfer complex formation (GS‐CTC) and doping in a series of diketopyrrolopyrrole‐based donor–acceptor semiconducting polymers paired with a π‐conjugated penta‐t‐butylpentacyanopentabenzo[25]annulene “cyanostar” macrocycle. Complementary experimental techniques show how subtle molecular, electronic,
Tanner L. Smith +13 more
wiley +1 more source
In Situ Magnetic Ordering and Microfabrication of Liquid Crystal Networks with Discretized Alignment
Advanced Functional Materials, EarlyView.Miniaturizing liquid crystal network actuators typically demands costly laser writing or digital light processing. A low‐cost photolithography platform couples rotating photomasks with a Halbach magnetic array to discretize in‐plane molecular alignment down to 50 µm, producing programmable, light‐responsive grippers, checkerboards, and origami‐inspired
Matthew Gene Scarfo +3 more
wiley +1 more source
New Proposal for the Detection of Concealed Weapons: Electromagnetic Weapon Detection for Open Areas [PDF]
Terrorist groups, hijackers, and people hiding guns and knifes are a constant and increasing threat Concealed weapon detection (CWO) has turned into one of the greatest challenges facing the law enforcement community today.
Agurto Goya, Alan
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Advanced Functional Materials, EarlyView.This work reveals the UV‐curing‐induced monomer‐rich domain, oligomer‐rich domain, and entangled oligomer domain. The cured submicron films in stressed state induce interlayer nano‐wrinkle structures during the deposition of the second layer. Stress‐free cured films in relaxed state form non‐diffusive, diffusive and semi‐diffusive interlayer ...
Shouzheng Chen +13 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao +8 more
wiley +1 more source