Results 51 to 60 of about 118,109 (263)

The relation between parameter curves and lines of curvature on canal surfaces

Kuwait Journal of Science, 2017
A canal surface is the envelope of a moving sphere with varying radius, defined by the trajectory C(t) (spine curve) of its center and a radius function r(t).
Fatih Dogan, Yusuf Yayli
doaj  

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

A cell model in the ventral visual pathway for the detection of circles of curvature constituting figures

Heliyon, 2020
The contour of an arbitrary figure can be represented as a group of circles of curvature in contact with it, with each curvature circle represented by its center OC and radius r.
Susumu Kawakami, Takehiro Ito, Yoshinari Makino, Makoto Hashimoto, Masafumi Yano   +4 more
doaj   +1 more source

Modulation of Homer1 EVH1 domain internal dynamics by putative autism‐associated mutations

FEBS Letters, EarlyView.
The putative autism‐associated M65I and S97L variants of the EVH1 domain of the postsynaptic scaffold protein Homer1 do not exhibit substantial changes in their overall structure or partner binding. Both of them, but especially the M65I variant, show altered internal dynamics relative to the wild‐type domain on the μs‐ms timescale, indicated by the ...
Fanni Farkas, Brigitta Maruzs, Zsófia E. Kálmán, Tomas Klumpler, Gyula Batta, Bálint Péterfia, Zoltán Gáspári   +6 more
wiley   +1 more source

Geometric characteristics of quantum evolution: curvature and torsion

Condensed Matter Physics, 2017
We study characteristics of quantum evolution which can be called curvature and torsion. The curvature shows a deviation of the state vector in quantum evolution from the geodesic line.
H.P. Laba, V.M. Tkachuk
doaj   +1 more source

Representation of a Monotone Curve by a Contour with Regular Change in Curvature

Entropy, 2021
The problem of modelling a smooth contour with a regular change in curvature representing a monotone curve with specified accuracy is solved in this article.
Yevhen Havrylenko, Yuliia Kholodniak, Serhii Halko, Oleksandr Vershkov, Oleksandr Miroshnyk, Olena Suprun, Olena Dereza, Taras Shchur, Mścisław Śrutek   +8 more
doaj   +1 more source

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

FEBS 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, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

Magnetic Field-line Curvature and Its Role in Particle Acceleration by Magnetically Dominated Turbulence

The Astrophysical Journal Letters
We employ first-principles, fully kinetic particle-in-cell simulations to investigate magnetic field-line curvature in magnetically dominated turbulent plasmas and its role in particle acceleration through curvature-drift motion along the motional ...
Samuel T. Sebastian, Luca Comisso
doaj   +1 more source

Curvature Blindness Illusion

i-Perception, 2017
We report a novel illusion––curvature blindness illusion: a wavy line is perceived as a zigzag line. The following are required for this illusion to occur.
Kohske Takahashi
doaj   +1 more source

Measurement point layout strategy of free-form surface based on gridding using coordinate measuring machine

International Journal of Metrology and Quality Engineering, 2023
The layout of measurement points is the key to the efficient inspection of free-form surfaces. Two algorithms are proposed for the layout of free-form surface measurement points: the free-form surface Gaussian curvature variation grid method and the ...
Zeng Linan, Chen Yueping
doaj   +1 more source