Results 71 to 80 of about 350,893 (316)

A discrete methodology for controlling the sign of curvature and torsion for NURBS [PDF]

open access: yes, 2009
This paper develops a discrete methodology for approximating the so-called convex domain of a NURBS curve, namely the domain in the ambient space, where a user-specified control point is free to move so that the curvature and torsion retains its sign ...
Karousos, EI   +5 more
core   +1 more source

Curvature and solidification [PDF]

open access: yesJournal of Computational Physics, 1985
A method is presented for finding the osculating circle, and thus the curvature and the normal, of a curve defined by an array of partial volumes. This method is applied, within the framework of an enthalpy formulation, to the solutions of model equations that describe the motion of a front separating ice and supercooled water.
openaire   +2 more sources

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

open access: yesFEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Maximal Graphs and Spacelike Mean Curvature Flows in Semi-Euclidean Spaces [PDF]

open access: yes, 2011
Two main results are proved. The first is for the maximal graph system in semi-Euclidean spaces. Existence of smooth solutions to the Dirichlet problem is proved, under certain assumptions on the boundary data.
THORPE, BENJAMIN,STUART   +1 more
core  

APPLICATIONS OF THE SPACE DIFFERENTAL GEOMETRY AT THE STUDY OF PRODUCTION FUNCTIONS

open access: yesEIRP Proceedings, 2006
This paper is a new onset about production functions. Because all papers on this subject use the projections of production functions on a plan, the analysis becomes heavy and less general in conclusions, and for this reason we made a treatment from the ...
Catalin Angelo Ioan
doaj  

Enhanced Curvature-Based Fabric Defect Detection: A Experimental Study with Gabor Transform and Deep Learning

open access: yesAlgorithms
Quality control at every stage of production in the textile industry is essential for maintaining competitiveness in the global market. Manual fabric defect inspections are often characterized by low precision and high time costs, in contrast to ...
Mehmet Erdogan, Mustafa Dogan
doaj   +1 more source

Surface Roughness and Land Use in Slovenia

open access: yesActa Geographica Slovenica, 2004
The article describes characteristics of several relief indicators (surface height, surface slope, surface aspect, height coefficient of surface roughness, slope coefficient of surface roughness, and aspect coefficient of surface roughness) relative to ...
Mauro Hrvatin, Drago Perko
doaj   +1 more source

Curves in the Lorentz-Minkowski plane with curvature depending on their position

open access: yesOpen Mathematics, 2020
Motivated by the classical Euler elastic curves, David A. Singer posed in 1999 the problem of determining a plane curve whose curvature is given in terms of its position. We propound the same question in the Lorentz-Minkowski plane, focusing on spacelike
Castro Ildefonso   +2 more
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

Invariance of the distributional curvature of the cone under smooth diffeomorphisms

open access: yes, 1999
An explicit calculation is carried out to show that the distributional curvature of a 2-cone, calculated by Clarke et al (Clarke C J S, Vickers J A and Wilson J P 1996 Class. Quantum Grav.
Vickers, J.A., Wilson, J.P.
core   +1 more source

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