Results 21 to 30 of about 87,664 (270)

Partial Discharge Localization Method Based on UHF Wireless Sensor Array in Air-insulated Substation

open access: yesZhongguo dianli, 2021
To achieve comprehensive insulation deterioration monitoring of power equipment and fault early-warning of air-insulated substations, we propose a data-driven partial discharge (PD) source localization methodology based on received signal strength ...
Shuai YAN   +5 more
doaj   +1 more source

Ligand-Driven Optimization of Iron Oxide Nanoprobes for In Vivo MRI Enhancement at Ultra-High Field. [PDF]

open access: yesSmall
Ligand‐tailored iron oxide nanoparticles reveal how surface chemistry controls T2 relaxivity and in vivo performance in ultra‐high‐field MRI. Systematic variation of hydrophilicity and charge across five coatings modulated r2 by up to 333 mm−1 s−1, with chemical properties, rather than shell thickness, dictating magnetic dephasing and enabling reliable
García-Acevedo P   +6 more
europepmc   +2 more sources

Transceiver 16-Channel Coaxial-End Dipole Array for Combined Head and C-Spine MRI at 9.4 T. [PDF]

open access: yesNMR Biomed
A double‐row transceiver array consisting of 16 folded‐end coaxial‐end dipoles was designed. Curved dipole elements were aligned on a tight‐fitting, ergonomically shaped holder optimized for subject comfort. Transmit efficiency, B1+ field homogeneity, and SAR were numerically evaluated using EM‐simulations and optimized with respect to several ...
Solomakha GA   +11 more
europepmc   +2 more sources

Comparative Performance of Aonla (Emblica officinalis G.) Cultivars under Parbhani Condition

open access: yesInternational Journal of Bio-Resource and Stress Management, 2023
The present investigation was carried out at the Department of Horticulture, college of Agriculture, Marathwada Krishi Vidyapeeth, Parbhani Maharastra during year 2009-2010 to evaluate “Comparative Performance of Aonla (Emblica officinalis G.) Cultivars
Bantesh Kumar Maholiya   +4 more
doaj  

Exact broken-symmetry states and Hartree-Fock solutions for quantum dots at high magnetic fields

open access: yes, 2004
Wigner molecules formed at high magnetic fields in circular and elliptic quantum dots are studied by exact diagonalization (ED) and unrestricted Hartree-Fock (UHF) methods with multicenter basis of displaced lowest Landau level wave functions. The broken
B. Szafran   +14 more
core   +1 more source

Broadband Compact Quasi Yagi Antenna for UHF Wireless Communication Systems with Enhanced Performance at UHF ISM Bands [PDF]

open access: yesRadioengineering, 2020
In this study, a broadband planar quasi Yagi antenna operated at ultra-high frequency (UHF) band is presented. The performance of the antenna is particularly improved for two popular UHF frequencies of 433 and 868 MHz used in several wireless ...
Y. Bakirli, A. Selek, M. Secmen
doaj  

Combined in-oil PD sensor with AE and UHF methods for PD detection in transformer

open access: yesEnergy Reports, 2022
In the present study, a combined in-oil partial discharge (PD) sensor based on oil valve with acoustical emission and ultra high frequency (AE/UHF) methods for PD measurement in transformer is proposed. The combined PD sensor is designed by placing an AE
Wenrong Si   +4 more
doaj   +1 more source

TDZ Induced Organogenesis and Phytochemical Profiling of In Vitro Raised Plants of Sarpgandha (Rauvolfia serpentina L.)- An Endangered Medicinal Plant

open access: yesInternational Journal of Economic Plants
This study was conducted during June, 2020–2021 at Department of Biotechnology, COHF, Dr YS Parmar UHF, Neri, Hamirpur, Himachal Pradesh, India for evaluating effect of TDZ on in vitro regeneration of Rauwolfia serpentina and further phytochemicals ...
Karuna Dhiman   +3 more
doaj   +1 more source

Quantitative Assessment of TV White Space in India

open access: yes, 2013
Licensed but unutilized television (TV) band spectrum is called as TV white space in the literature. Ultra high frequency (UHF) TV band spectrum has very good wireless radio propagation characteristics.
Karandikar, Abhay   +3 more
core   +1 more source

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