Results 21 to 30 of about 2,526,915 (286)

STOCHASTIC DYNAMICS OF CELL LINEAGE IN TISSUE HOMEOSTASIS. [PDF]

open access: yes, 2019
During epithelium tissue maintenance, lineages of cells differentiate and proliferate in a coordinated way to provide the desirable size and spatial organization of different types of cells.
Chen, Weitao, Nie, Qing, Qiu, Yuchi
core   +2 more sources

Noise levels in dental schools [PDF]

open access: yesEuropean Journal of Dental Education, 2006
Objective:  To measure and analyse noise levels in the learning–teaching activities at the Dental School of the University of Porto (Portugal).Materials and methods:  Sound levels were measured in five different practice areas and laboratories, selected as representative of a variety of learning–teaching activities.
Sampaio-Fernandes J.   +4 more
openaire   +3 more sources

STUDY ON NOISE LEVEL GENERATED BY HUMAN ACTIVITIES IN SIBIU CITY, ROMANIA [PDF]

open access: yesScientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2014
In this paper I have proposed an analysis and monitoring of the noise sources in the open spaces of air traffic, rail and car in Sibiu. From centralizing data obtained from the analysis of the measurements performed with equipment noise levels, we ...
Cristina STANCA-MOISE
doaj  

Extrapolation of Tikhonov regularization method

open access: yesMathematical Modelling and Analysis, 2010
We consider regularization of linear ill‐posed problem Au = f with noisy data fδ, ¦fδ - f¦≤ δ . The approximate solution is computed as the extrapolated Tikhonov approximation, which is a linear combination of n ≥ 2 Tikhonov approximations with different
Uno Hämarik, Reimo Palm, Toomas Raus
doaj   +1 more source

Noise and decoherence in quantum two-level systems

open access: yes, 2002
Motivated by recent experiments with Josephson-junction circuits we reconsider decoherence effects in quantum two-level systems (TLS). On one hand, the experiments demonstrate the importance of 1/f noise, on the other hand, by operating at symmetry ...
Alexander Shnirman   +4 more
core   +2 more sources

Scaled Sparse Linear Regression

open access: yes, 2012
Scaled sparse linear regression jointly estimates the regression coefficients and noise level in a linear model. It chooses an equilibrium with a sparse regression method by iteratively estimating the noise level via the mean residual square and scaling ...
Sun, Tingni, Zhang, Cun-Hui
core   +1 more source

CFAR matched direction detector [PDF]

open access: yes, 2006
In a previously published paper by Besson et al., we considered the problem of detecting a signal whose associated spatial signature is known to lie in a given linear subspace, in the presence of subspace interference and broadband noise of known level ...
Besson, Olivier, Scharf, Louis
core   +1 more source

Assessment of the noise level on arterial streets depending on traffic flow indicators

open access: yesTransport Technologies, 2021
The intensity of traffic flows increases every year and intensifies its impact significantly on urban territory's ecologic situation and natural environment.
Oleg Mironyuk
doaj   +1 more source

A Noise Emission and Vibration Study of a MISTA RD-165 FHAD Grader to Reduce Environmental Harmful Impact

open access: yesTechnologia i Automatyzacja Montażu, 2023
Construction machinery noise emission and vibration on the operator sitearethe most important harmful factors having impact on human health. Theyaffect for people working on the operators andas well as otherpersons around the machine.
Janusz Kobiałka, Andrzej Barszcz
doaj   +1 more source

Two-level system with noise: Blue's function approach

open access: yes, 1997
By using the random matrix approach and generalized Blue's function representation we solve analytically the model of an effective two-level system coupled to a noise reservoir.
Brézin   +38 more
core   +1 more source

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