Results 31 to 40 of about 87,664 (270)

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

Otkrivanje i analiza signala parcijalnih pražnjenja u energetskom transformatoru UHF metodom

Energija, Ekonomija, Ekologija, 2020
U ovom radu predstavljeno je praktično otkrivanje signala parcijalnih pražnjenja pomoću UHF davača montiranog na energetskom transformatoru i izvršena je detaljna analiza signala.
Đorđe Dukanac
doaj   +1 more source

Propagation and localisation of partial discharge in transformer bushing based on ultra‐high frequency technique

High Voltage, 2021
As an essential component of power transformers, the detection and diagnosis of incipient partial discharge (PD) activities of bushings are of great significance. A 35‐kV oil‐impregnated paper (OIP) bushing is investigated.
Jun Jiang, Judong Chen, Jiansheng Li, Xiaoping Yang, Ricardo Albarracín‐Sánchez, Prem Ranjan, Chaohai Zhang   +6 more
doaj   +1 more source

Ultimate Intrinsic SNR in the Torso of Realistic Body Models. [PDF]

Magn Reson Med
ABSTRACT Purpose This work aims to investigate how the ultimate intrinsic signal‐to‐noise ratio (uiSNR) varies with increasing static magnetic field B0$$ {B}_0 $$ in the torso of realistic body models. Methods A dipole cloud was positioned around the realistic body model and randomly excited.
Wang Y, May MW, Gratz M, Ladd ME, Orzada S.   +4 more
europepmc   +2 more sources

Eliminating spin contamination in auxiliary-field quantum Monte Carlo: realistic potential energy curve of F2

, 2007
The use of an approximate reference state wave function |Phi_r> in electronic many-body methods can break the spin symmetry of Born-Oppenheimer spin-independent Hamiltonians.
Henry Krakauer, Shiwei Zhang, W. A. Al-Saidi, Wirawan Purwanto, Zhang S.   +4 more
core   +1 more source

Isomorphisms of UHF algebras

Journal of Functional Analysis, 1978
AbstractWe show that all uniformly hyperfinite C∗-algebras have Borel isomorphic spectra, and that the spectrum of each separable C∗-algebra not of type I contains a copy of this space as a Borel subset.
openaire   +2 more sources

Systematic Benchmarking of a Noise‐Tolerant Conductive Hydrogel Electrode for Epidermal Bioelectronics

Advanced Science, EarlyView.
General schematic of the approach. Abstract Conventional Silver/Silver Chloride (Ag/AgCl) electrodes remain the clinical standard for electrophysiological monitoring but are hindered by poor skin conformity, mechanical rigidity, and signal degradation, particularly under motion or sweat.
Nazmi Alsaafeen, Ioannis Ziogas, Shirina Alsaedi, Mouza Alshehhi, Shahd Almheiri, Adil Rehman, Khulood Al Shehhi, Hani Saleh, Ahsan Khandoker, Charalampos Pitsalidis, Antoun Khawaja, Anna‐Maria Pappa   +11 more
wiley   +1 more source

Influence of Aspect on Phenology of Himalayan Wild Cherry viz.Prunus cerasoides D. Don

International Journal of Bio-Resource and Stress Management
The current study was carried out on Prunus cerasoides at two sites: Daro in District Sirmour and Nauni in District Solan of Himachal Pradesh (August 2022–May, 2023), aimed to understand the phenological behaviour of Himalayan wild cherry viz.
Sugandhi Chauhan, Jai Pal Sharma, Pratima Vaidya, Nitin Sharma, Shikha Bhagta, Anchal   +5 more
doaj   +1 more source

Land use and land cover changes in Kullu valley of Himachal Pradesh

The Indian Journal of Agricultural Sciences, 2018
Land use changes are the land conversions from one type to another that alter the earth surface to satisfy mankind's immediate demand. Land use change detection using satellite imageries has emerged important mean to gather information on regional scale
PRATIMA VAIDYA, SATISH KUMAR BHARDWAJ, SAHIL SOOD   +2 more
doaj   +1 more source

Wideband UHF Antenna for Partial Discharge Detection

Applied Sciences, 2020
This paper presents a ultra-high frequency (UHF) antenna for partial discharge (PD) detection and the antenna sensor can be used near a conducting ground wire.
Zhen Cui, Seungyong Park, Hosung Choo, Kyung-Young Jung   +3 more
doaj   +1 more source