Results 31 to 40 of about 86,214 (301)

Perfect hexagon triple systems

open access: yesDiscrete Mathematics, 2004
This paper gives necessary and sufficient conditions (with only two exceptional cases which remain open) for the existence of perfect maximum packings of \(3kK_n\) with hexagon triples. Here a hexagon triple is a collection of three triples \(abc\), \(cde\), \(efa\) forming a hexagon.
Selda Küçükçifçi   +1 more
openaire   +1 more source

Crushing Behavior of Composite Hexagonal Ring System

open access: yes, 2011
An extensive experimental investigation of inplane crushing of composite hexagonal ring system between platens has been carried out. Woven roving glass/epoxy hexagonal ring system with different angles and arrangement were employed.
Elsadig Mahdi, A. M. S. Hamouda
core   +1 more source

Performance Analysis of Linear Cellular Networks on Highways

open access: yesJournal of Communications Software and Systems
This study demonstrates the importance of designing wireless networks along highways efficiently, taking into consideration the linear distribution of cells to improve performance and preserve communication quality in environments with linear structures.
Sarab Kamal Mahmood   +2 more
doaj   +1 more source

BACK TO BASICS: TOWARDS NOVEL COMPUTATION AND ARRANGEMENT OF SPATIAL SENSORY IN IMAGES

open access: yesActa Polytechnica, 2016
The current camera has made a huge progress in the sensor resolution and the lowluminance performance. However, we are still far from having an optimal camera as powerful as our eye is.
Wei Wen, Siamak Khatibi
doaj   +1 more source

Hexagon quadrangle systems

open access: yesDiscrete Mathematics, 2008
AbstractA hexagon quadrangle system of order n and index ρ [HQSρ(n)] is a pair (X,H), where X is a finite set of n vertices and H is a collection of edge disjoint hexagon quadrangles (called blocks) which partitions the edge set of ρKn, with vertex set X.
openaire   +1 more source

Central composite design (CCD)-Response surface methodology (RSM) for modeling and simulation of MWCNT-water nanofluid inside hexagonal cavity: Application to electronic cooling

open access: yesCase Studies in Thermal Engineering, 2023
Purpose: In application of hexagonal shapes, engineers and researchers use mathematical modeling, computational fluid dynamics (CFD), and experimental techniques to study natural convection inside hexagonal cavities and improve the design and efficiency ...
Jianfeng Wang   +7 more
doaj   +1 more source

Influence of ice crystal shape on retrieval of cirrus optical thickness and effective radius: A case study

open access: yes, 2009
Airborne measurements of spectral upwelling radiances (350â  2200 nm) reflected by cirrus using the Spectral Modular Airborne Radiation measurement sysTem (SMART)-Albedometer were made over land and water surfaces.
Minikin, Andreas   +7 more
core   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

open access: yesFEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill   +4 more
wiley   +1 more source

The fundamental group and Galois coverings of hexagonal systems in 3-space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2006
We consider hexagonal systems embedded into the 3-dimensional space ℝ3. We define the fundamental group π1(G) of such a system G and show that in case G is a finite hexagonal system with boundary, then π1(G) is a (non-Abelian) free group.
J. A. De La Peña, L. Mendoza
doaj   +1 more source

The impact of lead on structural, electronic, and vibrational properties of pristine C36 and its boron, nitrogen-dopant C36 on pentagonal and hexagonal rings

open access: yesChemical Physics Impact, 2023
In this work, lead's impacts on the structural, electronic, and vibrational characteristics of pure C36 and C36 doped with boron and nitrogen on pentagonal and hexagonal rings are calculated using the DFT method.
Shaida Anwer Kakil   +2 more
doaj   +1 more source

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