Results 41 to 50 of about 1,492,115 (344)

Influence of stress wave-induced disturbance on ultra-low friction in broken blocks

International Journal of Coal Science & Technology, 2022
Deep rock mass tends to be broken into blocks when mining for materials deep below the surface. The rock layer of the roof of the mine can be regarded as a system of blocks of fractured rock mass.
Liping Li, Haitao Zhang, Yishan Pan, Xiangyu Ju, Lei Tang, Minghui Li   +5 more
doaj   +1 more source

Ultra low frequency geomagnetic field measurements during earthquake activity in Italy (September-October 1997)

Annals of Geophysics, 2001
Different methods with different results have been proposed in the scientific literature to identify the possible occurrence of weak seismo-magnetic ULF emissions. In September-October, 1997 Central Italy was struck by repeated seismic activity (M L <
A. Piancatelli, M. Vellante, U. Villante
doaj   +1 more source

Theoretical and Experimental Investigations on the Ultra-Low-Frequency Broadband of Quasi-Static Metamaterials

Applied Sciences, 2022
This paper proposes an I-shaped radial elastic metamaterial with ultra-low-frequency broadband characteristics and studies the propagation characteristics of elastic waves in their quasi-static state.
Haixia Liu, Weitao He, Lixia Li, Qi Jia
doaj   +1 more source

Low noise high performance 50nm T-gate metamorphic HEMT with cut-off frequency f_T of 440 GHz for millimeterwave imaging receivers applications [PDF]

, 2005
The 50 nm m-HEMT exhibits extremely high f_T, of 440GHz, low F_min of 0.7 dB, associated gain of 13 dB at 26 GHz with an exceptionally high Id of 200 mA/mm and gm of 950 ms/mm at low noise biased ...
H. McLelland, Elgaid, K., K. Elgaid, M. Holland, I.G. Thayne, Holland, M., Thayne, I.G., Moran, D., McLelland, H., D. Moran   +9 more
core   +1 more source

Thick conducting polymer films for ultra-low frequency stimulation [PDF]

APL Electronic Devices
Conducting polymers like poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) offer the possibility of improving the electrochemical performance of bioelectronic and biomedical devices beyond what conventional electrode materials offer. To
Christopher M. Proctor, Yaw O. Ansong Snr   +1 more
doaj   +1 more source

Venous Thromboembolism in Pediatric Bone Sarcoma Patients: A 10‐Year, Single‐Institution Experience Encompassing the COVID‐19 Pandemic

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Osteosarcoma (OS) and Ewing sarcoma (EWS) are the most common primary bone cancers in children, but acute thrombosis is poorly characterized in this population. Our study evaluated the rates of venous thromboembolism (VTE) and associated risk factors in pediatric patients with bone sarcomas treated over a 10‐year period encompassing
Sarah Kappa, Shou Xu, Mark Zobeck, Sarah E. Sartain, Nino Rainusso, Lisa Wang, Nicole Montgomery, Paige Wheaton, Sarah Whittle   +8 more
wiley   +1 more source

Projeto de um circuito divisor de frequência de ultra-baixo consumo de potência [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia ElétricaEsta dissertação apresenta o projeto de um circuito Prescaler Dual-Modulus 8/9 (PDM), projetado para a tecnologia TSMC 0 ...
Giusti, Gustavo Buchweitz
core  

Design of frequency invariant beamformer for broadband arrays

, 2007
A simple method for the design of a class of arrays with frequency invariant beam patterns is proposed. Starting from the desired frequency invariant beam pattern of an n-D array, the proposed method uses a series of substitutions and an n-D inverse ...
Weiss, Stephan, Stephan Weiss, Liu, Wei, Weiss, S., Liu, W., Wei Liu   +5 more
core   +1 more source

Serological Benefit of SARS‐CoV‐2 Vaccination Relative to Infection in Children With Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with acute lymphoblastic leukemia (ALL) are at risk of severe outcomes from SARS‐CoV‐2 (SCV2). In the post‐pandemic context, where most children have been infected with SCV2, there are limited data on whether vaccination remains beneficial in children with ALL.
Janna R. Shapiro, Freda Qi, Karen Colwill, Alina D. Dorogy, Ying Liu, Michelle Science, Anne‐Claude Gingras, James M. Rini, Sumit Gupta, Sarah Alexander, Shelly Bolotin, Tania H. Watts   +11 more
wiley   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source