Results 31 to 40 of about 238,893 (183)

Differential Cohomology and Gerbes: An Introduction to Higher Differential Geometry

open access: yesAxioms
Differential cohomology is a topic that has been attracting considerable interest. Many interesting applications in mathematics and physics have been known, including the description of WZW terms, string structures, the study of conformal immersions, and
Byungdo Park
semanticscholar   +1 more source

PARTICLE MOTION OVER THE EDGE OF AN INCLINED PLANE THAT PERFORMS AXIAL MOVEMENT IN A VERTICAL LIMITING CYLINDER

open access: yesActa Polytechnica, 2019
Differential equations of a relative material particle motion over the edge of an inclined flat ellipse that rotates around the axis of a vertical limiting cylinder have been deduced. The position of a plane relative to the axis of the rotation is set by
Serhii F. Pylypaka   +3 more
doaj   +1 more source

Planar quadrature RF transceiver design using common-mode differential-mode (CMDM) transmission line method for 7T MR imaging. [PDF]

open access: yesPLoS ONE, 2013
The use of quadrature RF magnetic fields has been demonstrated to be an efficient method to reduce transmit power and to increase the signal-to-noise (SNR) in magnetic resonance (MR) imaging. The goal of this project was to develop a new method using the
Ye Li   +4 more
doaj   +1 more source

Differential geometry of line of curvature on parametric hypersurfaces in $\mathbb{E}^4$

open access: yes, 2018
The purpose of this paper is, first, to give an algorithm that enables to obtain the lines of curvature on parametric hypersurfaces in Euclidean 4-space, and then, to obtain the curvatures of such lines by using the extended Darboux frame along the curve.
Çelik, Fatih, Düldül, Mustafa
openaire   +2 more sources

Foraging behaviour of honeybees (Apis spp.) (Hymenoptera: Apidae) in hybrid seed production of Indian mustard (Brassica juncea)

open access: yesThe Indian Journal of Agricultural Sciences, 2014
Pollination of entomophilous crops by honeybees is considered as one of the effective and inexpensive method for improving the crop yield and its quality. In most of the crops, effective pollination is prerequisite for fruitful fertilisation.
ANIRUDDHA MAITY   +2 more
doaj   +1 more source

Automatic PCB Layout Optimization of a DC-DC Converter Through Genetic Algorithm Regarding EMC Constraints

open access: yesIEEE Access, 2021
This paper proposes an optimization approach for an automatic buck converter printed circuit board (PCB) design regarding the electromagnetic compatibility (EMC) constraints.
Wided Belloumi   +4 more
doaj   +1 more source

Timelike line congruences via surface theory in Minkowski 3-space

open access: yesAIP Advances
Line congruences are crucial in classical geometry, particularly in relating one surface to another through families of lines. These correspondences are most valuable when they preserve key geometric features of the original surface.
Areej A. Almoneef, Rashad A. Abdel-baky
doaj   +1 more source

Railway Infrastructure Classification and Instability Identification Using Sentinel-1 SAR and Laser Scanning Data

open access: yesSensors, 2020
Satellite radar interferometry (InSAR) techniques have been successfully applied for structural health monitoring of line-infrastructure such as railway.
Ling Chang   +3 more
doaj   +1 more source

The geometry of differential privacy: the sparse and approximate cases [PDF]

open access: yesSymposium on the Theory of Computing, 2012
We study trade-offs between accuracy and privacy in the context of linear queries over histograms. This is a rich class of queries that includes contingency tables and range queries and has been the focus of a long line of work.
Aleksandar Nikolov   +2 more
semanticscholar   +1 more source

指状锥面二次包络圆柱蜗杆传动接触线分析

open access: yesJixie chuandong, 2007
Based on differential geometry and spatial engaging theory,a set of formula of finger conical surface double enveloping worm gearing is derived.Through an example,the undercutting boundary line and contact line are depicted.At the same time,the variation
彭晓南, 王自兴
doaj  

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