Antibacterial metabolites from an unexplored strain of marine fungi Emericellopsis minima and determination of the probable mode of action against Staphylococcus aureus and methicillin‐resistant S. aureus
Sign Up to like & getrecommendations! Published in 2022 at "Biotechnology and Applied Biochemistry"
DOI: 10.1002/bab.2334
Abstract: Increasing prevalence of drug resistance has led researchers to focus on discovering new antibacterial agents derived from the marine biome. Although ample studies have investigated marine fungi for their bioactive metabolites with hopeful prospects in… read more here.
Keywords: marine fungi; methicillin resistant; staphylococcus aureus; resistant aureus ... See more keywords
Gradient Surfing: A New Deterministic Approach for Low-Dimensional Global Optimization
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Optimization Theory and Applications"
DOI: 10.1007/s10957-018-1397-z
Abstract: We describe a novel global optimization technique which utilizes global minima basins of attraction in order to quickly converge to a global minima. A key to the proposed method is the “steeper goes deeper” heuristic:… read more here.
Keywords: gradient surfing; global optimization; surfing new; minima ... See more keywords
Blood vessel segmentation and extraction using H-minima method based on image processing techniques
Sign Up to like & getrecommendations! Published in 2021 at "Multimedia Tools and Applications"
DOI: 10.1007/s11042-020-09646-3
Abstract: In this paper, the H-minima transform is used for blood vessel segmentation. The aim of this study is to get the high accuracy of blood vessel segmentation in retinal images. In this study the good… read more here.
Keywords: blood vessel; vessel segmentation; method; minima ... See more keywords
Fixed points of symmetric complex-valued Hopfield neural networks
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DOI: 10.1016/j.neucom.2017.05.006
Abstract: Abstract A complex-valued Hopfield neural network (CHNN) is a model of a multistate Hopfield neural network, and has been applied to the storage of multilevel data. Weak noise tolerance, however, is a disadvantage of CHNNs.… read more here.
Keywords: valued hopfield; minima; local minima; complex valued ... See more keywords
Depletions of Multi‐MeV Electrons and Their Association to Minima in Phase Space Density
Sign Up to like & getrecommendations! Published in 2022 at "Geophysical Research Letters"
DOI: 10.1029/2021gl097620
Abstract: Fast‐localized electron loss, resulting from interactions with electromagnetic ion cyclotron (EMIC) waves, can produce deepening minima in phase space density (PSD) radial profiles. Here, we perform a statistical analysis of local PSD minima to quantify… read more here.
Keywords: emic waves; phase space; minima phase; space density ... See more keywords
Distribution of Seed Electron Phase Space Density Minima in Earth's Radiation Belts
Sign Up to like & getrecommendations! Published in 2024 at "Geophysical Research Letters"
DOI: 10.1029/2023gl108028
Abstract: We conducted a statistical analysis of local phase space density (PSD) minima across a wide energy range (∼20 keVs to ∼10 MeV), using observations from the Van Allen Probes and the Geostationary Operational Environmental Satellite.… read more here.
Keywords: minima; seed; distribution; radiation belts ... See more keywords
GaSb band-structure models for electron density determinations from Raman measurements.
Sign Up to like & getrecommendations! Published in 2023 at "Journal of applied physics"
DOI: 10.1063/5.0140357
Abstract: We investigate the use of Raman spectroscopy to measure carrier concentrations in n-type GaSb epilayers to aid in the development of this technique for the nondestructive characterization of transport properties in doped semiconductors. The carrier… read more here.
Keywords: band; carrier; conduction band; gasb conduction ... See more keywords
Dynamo modelling for cycle variability and occurrence of grand minima in Sun-like stars: rotation rate dependence
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1105
Abstract: Like the solar cycle, stellar activity cycles are also irregular. Observations reveal that rapidly rotating (young) Sun-like stars exhibit a high level of activity with no Maunder-like grand minima and rarely display smooth regular activity… read more here.
Keywords: sun like; stars rotation; dynamo; minima ... See more keywords
Viscoelastic Fluid-Inspired Swarm Behavior to Reduce Susceptibility to Local Minima: The Chain Siphon Algorithm
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2021.3128705
Abstract: We present a novel distributed robotic swarm algorithm inspired by the open channel siphon phenomenon displayed in certain viscoelastic fluids. Self-siphoning viscoelastic fluids are often able to mitigate the trapping effects of local minima in… read more here.
Keywords: minima; susceptibility local; swarm; local minima ... See more keywords
Spurious Local Minima in Power System State Estimation
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Control of Network Systems"
DOI: 10.1109/tcns.2019.2920586
Abstract: The power system state estimation problem computes the set of complex voltage phasors given quadratic measurements using nonlinear least squares. This is a nonconvex optimization problem, so even in the absence of measurement errors, local… read more here.
Keywords: state estimation; local minima; minima; spurious local ... See more keywords
The loss surface of deep linear networks viewed through the algebraic geometry lens
Sign Up to like & getrecommendations! Published in 2021 at "IEEE transactions on pattern analysis and machine intelligence"
DOI: 10.1109/tpami.2021.3071289
Abstract: By using the viewpoint of modern computational algebraic geometry, we explore properties of the optimization landscapes of the deep linear neural network models. After clarifying on the various definitions of "flat" minima, we show that… read more here.
Keywords: algebraic geometry; number; linear networks; minima ... See more keywords