Results 11 to 20 of about 2,627,966 (379)

Ultra-High-Frequency-Radio-Frequency-Acoustic Molecular Imaging with Saline Nanodroplets in Living Subjects

Nature Nanotechnology, 2021
Molecular imaging is a crucial technique in clinical diagnostics but it relies on radioactive tracers or strong magnetic fields that are unsuitable for many patients, particularly infants and pregnant women. Ultra-high-frequency radio-frequency acoustic (
Yun-Sheng Chen, Yang Zhao, C. Beinat, A. Zlitni, E. Hsu, Dong-Hua Chen, F. Achterberg, Hanwei Wang, Tanya Stoyanova, J. Dionne, S. Gambhir   +10 more
semanticscholar   +3 more sources

Estimation of the activation energy in the Ag/SnSe/Ge2Se3/W self-directed channel memristor [PDF]

Modern Electronic Materials, 2023
In this study, we conducted an investigation into the Ag/SnSe/Ge2Se3/W ionic memristor, focusing on the determination of activation energies associated with its two primary operational processes: the formation of conductive filaments and memristor ...
Andrey N. Aleshin, Oleg A. Ruban
doaj   +3 more sources

High-temperature terahertz quantum-cascade lasers: design optimization and experimental results

Российский технологический журнал, 2022
Objectives. Terahertz quantum-cascade lasers (THz QCLs) are compact solid-state lasers pumped by electrical injection to generate radiation in the range from 1.2 to 5.4 THz.
D. V. Ushakov, A. A. Afonenko, I. A. Glinskiy, R. A. Khabibullin   +3 more
doaj   +1 more source

Robust Simultaneous Localization and Mapping Using Range and Bearing Estimation of Radio Ultra High Frequency Identification Tags

IEEE Transactions on Control Systems Technology, 2023
In this article, we consider an indoor simultaneous localization and mapping (SLAM) problem for a mobile robot measuring the phase of the signal backscattered by a set of passive radio ultra high frequency identification (ID) tags, deployed in unknown ...
Fabrizio Romanelli, F. Martinelli, E. D. Giampaolo   +2 more
semanticscholar   +1 more source

Ultra-High-Frequency Ultrasound: A Modern Diagnostic Technique for Studying Melanoma

Ultraschall in der Medizin - European Journal of Ultrasound, 2023
The development of new ultra-high-frequency devices with a resolution of 30 μm makes it possible to use ultrasound in the study of new small anatomical units and to apply this tool to new fields of pathology.
A. Reginelli, A. Russo, D. Berritto, V. Patanè, C. Cantisani, R. Grassi   +5 more
semanticscholar   +1 more source

Improving the efficiency of an optical-to-terahertz converter using sapphire fibers

Российский технологический журнал, 2023
Objectives. The study aims to improve the efficiency of a large-area photoconductive terahertz (THz) emitter based on an optical-to-terahertz converter (OTC) having a radiating area of 0.3 × 0.3 mm2 for generating high-power THz radiation by using an ...
N. V. Zenchenko, D. V. Lavrukhin, I. A. Glinskiy, D. S. Ponomarev   +3 more
doaj   +1 more source

Ventricular Dyssynchrony and Pacing-induced Cardiomyopathy in Patients with Pacemakers, the Utility of Ultra-high-frequency ECG and Other Dyssynchrony Assessment Tools

Arrhythmia & Electrophysiology Review, 2022
The majority of patients tolerate right ventricular pacing well; however, some patients manifest signs of heart failure after pacemaker implantation and develop pacing-induced cardiomyopathy.
J. Mizner, P. Jurák, H. Linkova, R. Smíšek, K. Čurila   +4 more
semanticscholar   +1 more source

Fabrication and Characterization of an 8 × 8 Terahertz Photoconductive Antenna Array for Spatially Resolved Time Domain Spectroscopy and Imaging Applications

IEEE Access, 2021
Terahertz (THz) technology is promising in several applications such as imaging, spectroscopy and communications. Among several methods in the generation and detection of THz waves, a THz time-domain system that is developed using photoconductive ...
Raphael Henri, Kathirvel Nallappan, Dmitry S. Ponomarev, Hichem Guerboukha, Denis V. Lavrukhin, Alexander E. Yachmenev, Rustam A. Khabibullin, Maksim Skorobogatiy   +7 more
doaj   +1 more source

GaAs Molecular Beam Epitaxy on (110)-Oriented Substrates

Crystals, 2022
Molecular-beam epitaxial growth of Si-doped GaAs single-crystal layers on (110)-oriented GaAs substrates has been studied. The surface morphology of grown films was analyzed by scanning electron microscopy and atomic force microscopy, and the crystal ...
Evgeniy Klimov, Aleksey Klochkov, Sergey Pushkarev, Galib Galiev, Rinat Galiev, Nataliya Yuzeeva, Aleksey Zaitsev, Yury Volkovsky, Alexey Seregin, Pavel Prosekov   +9 more
doaj   +1 more source

Financial Econometric Analysis at Ultra-High Frequency: Data Handling Concerns

Computational Statistics and Data Analysis, 2006
Christian T. Brownlees, Giampiero M. Gallo   +1 more
openalex   +3 more sources