Results 21 to 30 of about 856,870 (289)
Vibration control of thin-walled circular plate structures based on piezoelectric shunt arrays
Lixin Yang +4 more
openalex +2 more sources
JACC: Case Reports, 2023 We present a 22-week fetus with isolated absent aortic valve and inverse circular shunt. The pregnancy was interrupted. Here, echocardiography and pathology images demonstrate this rare entity.
Eleanor L. Schuchardt, MD +7 more
doaj +1 more source
IET Microwaves, Antennas & Propagation, 2021 In the present study, a novel periodic planar leaky‐wave antenna (PLWA) was designed, simulated, and fabricated based on the substrate integrated waveguide (SIW) technology.
Saeed Barzegari +2 more
doaj +1 more source
Parameter study of ehf dual-band vibrator antennas with coaxial and two-wire shunts [PDF]
Радиофизика и электроника, 2021 Subject and Purpose. Two types of new dual-frequency microwave antennas with coaxial and two-wire shunts are considered with a view to improve calculation methods of radio engineering and design parameters of the antennas of the kind.
V.V. Ovsyanikov
doaj +1 more source
Frontiers in Physiology, 2020 Decompression sickness and arterial gas embolism, collectively known as decompression illness (DCI), are serious medical conditions that can result from compressed gas diving. DCI can present with a wide range of physiologic and neurologic symptoms.
Frank Hartig +7 more
doaj +1 more source
Isolation and Identification of Pentalenolactone Analogs from Streptomyces sp. NRRL S-4
Molecules, 2021 Terpene synthases are widely distributed in Actinobacteria. Genome sequencing of Streptomyces sp. NRRL S-4 uncovered a biosynthetic gene cluster (BGC) that putatively synthesizes pentalenolactone type terpenes.
Huanhuan Li +4 more
doaj +1 more source
Design of circularly polarized planar leaky‐wave antenna using characteristic mode analysis
IET Microwaves, Antennas & Propagation, 2021 In the present study, a characteristic mode analysis (CMA) is proposed for the first time to design a periodic leaky‐wave antenna (LWA). By applying CMA to the unit cell of a periodic travelling wave structure, the open stopband is suppressed and ...
Saeed Barzegari +2 more
doaj +1 more source
IEEE Access, 2021 In this paper a metamaterial-inspired T-matching network is directly imbedded inside the feedline of a microstrip antenna to realize optimum power transfer between the front-end of an RF wireless transceiver and the antenna.
Mohammad Alibakhshikenari +14 more
doaj +1 more source
Impedance analysis of new PS internal dump design [PDF]
, 2018 The High Luminosity Large Hadron Collider (HL-LHC) project at CERN calls for increasing beam intensity in the injector chain. In the Proton Synchrotron (PS), a pre-injector of the LHC, these intensities can result in beam instabilities and potential RF ...
Popovic, Branko +2 more
core +1 more source