Results 51 to 60 of about 12,187,245 (343)
SensorsIn the process of unconventional oil and gas production, a large number of microseismic signals are generated. These signals are received by geophones deployed on the ground or in wells and used for safety monitoring.
Zesheng Yang +3 more
doaj +1 more source
Sensors, 2023 Natural frequency is an important parameter in the structural health monitoring (SHM) system. Any changes in this parameter indicate structural alteration due to damage.
Prattasha Saha, Mijia Yang
doaj +1 more source
Size and frequency of natural forest disturbances and Amazon carbon balance [PDF]
, 2014 Forest inventory studies in the Amazon indicate a large terrestrial carbon sink. However, field plots may fail to represent forest mortality processes at landscape-scales of tropical forests. Here we characterize the frequency distribution of disturbance
Asner, Gregory P +20 more
core +1 more source
On the 1/f Frequency Noise in Ultra-Stable Quartz Oscillators
, 2006 The frequency flicker of an oscillator, which appears as a 1/f^3 line in the phase noise spectral density, and as a floor on the Allan variance plot, originates from two basic phenomena, namely: (1) the 1/f phase noise turned into 1/f frequency noise via
Giordano, Vincent, Rubiola, Enrico
core +4 more sources
Wave chaos in rapidly rotating stars [PDF]
, 2008 Effects of rapid stellar rotation on acoustic oscillation modes are poorly understood. We study the dynamics of acoustic rays in rotating polytropic stars and show using quantum chaos concepts that the eigenfrequency spectrum is a superposition of ...
A. Baglin +7 more
core +2 more sources
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source
Applied Sciences, 2023 The article defines and explains methods for detecting and locating damage and quantifying its extent on an example of a finite element model of a simple beam.
Marek Páleník +2 more
doaj +1 more source
What are natural frequencies? [PDF]
BMJ, 2011 Doctors need to find better ways to communicate risk to patients A 2011 Cochrane Review concluded that health professionals and consumers “understood natural frequencies better than probabilities.”1 A 2011 Annals of Internal Medicine article reported the opposite, that “natural frequencies are not the best format for communicating the absolute ...
openaire +2 more sources
Reciprocal control of viral infection and phosphoinositide dynamics
FEBS Letters, EarlyView.Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley +1 more source
Natural Frequency Analysis Of All Edges Clamped Flexible Thin Plate [PDF]
, 2010 In this paper, the analysis of natural frequencies for all clamped edges rectangular flexible thin plate is carried out using Finite Difference (FD) and Finite Element (FE) approaches.
Mat Darus, Intan Zaurah +1 more
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