Results 31 to 40 of about 377,910 (301)
Extended Evolutionary Algorithms with Stagnation-Based Extinction Protocol
Applied Sciences, 2021 Extinction has been frequently studied by evolutionary biologists and is shown to play a significant role in evolution. The genetic algorithm (GA), one of popular evolutionary algorithms, has been based on key concepts in natural evolution such as ...
Gan Zhen Ye, Dae-Ki Kang
doaj +1 more source
The Reasons for Stagnation of Calf Breeding Cooperatives in Kermanshah City (A Case Study of Cooperative No. 348) [PDF]
تعاون و کشاورزی, 2011 The purpose of this qualitative research was to determine the reasons of stagnation in calf breeding farm cooperatives in Kermanshah City in 2010 by utilizing Grounded Theory. To this end, the stagnated calf breeding cooperative no.
Sh Geravandi, A. H Alibeigi
doaj
Response of air stagnation frequency to anthropogenically enhanced radiative forcing
Environmental Research Letters, 2012 Stagnant atmospheric conditions can lead to hazardous air quality by allowing ozone and particulate matter to accumulate and persist in the near-surface environment.
Daniel E Horton +2 more
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Richardson's pair diffusion and the stagnation point structure of turbulence [PDF]
, 2002 DNS and laboratory experiments show that the spatial distribution of straining stagnation points in homogeneous isotropic 3D turbulence has a fractal structure with dimension D_s = 2.
A. Obukhov +15 more
core +2 more sources
e-Government Lessons from South Africa 2001-2011: Institutions, State of Progress and Measurement
The African Journal of Information and Communication, 2012 Electronic governance is the future of public governance globally. Governments that do not make the transition from paper-based systems of public administration to electronic platforms of public governance may swiftly undermine their chances of ...
Fanie Cloete
doaj +1 more source
, 2013 We present spatially resolved measurements characterizing the stagnation layer between two obliquely merging supersonic plasma jets. Intra-jet collisionality is very high ($\lambda_{ii} \ll 1$mm), but the inter-jet ion-ion mean free paths are on the same
Gilmore, Mark +4 more
core +1 more source
Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition
Advanced Engineering Materials, EarlyView.A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley +1 more source
Vortex shedding in a two-dimensional diffuser: theory and simulation of separation control by periodic mass injection [PDF]
, 2004 We develop a reduced-order model for large-scale unsteadiness (vortex shedding) in a two-dimensional diffuser and use the model to show how periodic mass injection near the separation point reduces stagnation pressure loss.
Colonius, Tim +2 more
core +1 more source
Advanced Engineering Materials, EarlyView.A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič +7 more
wiley +1 more source
Journal of Biomechanical Science and Engineering, 2011 Blood flow in a filter for an extracorporeal blood circuit was analyzed numerically to assess fluid mechanical quantities related to thrombogenesis. Results showed stagnant flow regions, in particular at the downstream side of the ceiling of a filter.
Masanori NAKAMURA +2 more
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