Results 51 to 60 of about 17,391 (302)

Circle packing and Möbius transformations [PDF]

open access: yes, 2019
A graph can be represented by various geometric representations. In this work we focus on the circle packing representation. We state various concepts impor- tant for proving results regarding this kind of representation.
Porvichová, Janka
core  

Power-Efficient Wireless Coverage Using Minimum Number of UAVs

open access: yesSensors, 2021
Unmanned aerial vehicles (UAVs) can be deployed as backup aerial base stations due to cellular outage either during or post natural disaster. In this paper, an approach involving multi-UAV three-dimensional (3D) deployment with power-efficient planning ...
Ahmad Sawalmeh   +5 more
doaj   +1 more source

Construction of both Geometric Relationships of Ellipses and Parabola-bounded Regions in Geometric Placement Problems [PDF]

open access: yesJournal of Mechanical Engineering, 2020
Currently, there is a significant growth of interest in the practical problems of mathematically modeling the placement of geometric objects of various physical natures in given areas.
Mykola I. Hil, Volodymyr M. Patsuk
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

open access: yesFEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Optimal SMF packing in photonic lanterns: comparing theoretical topology to practical packing arrangements [PDF]

open access: yes, 2021
Photonic lanterns rely on a close packed arrangement of single mode fibers, which are tapered and fused into one multi-mode core. Topologically optimal circle packing arrangements have been well studied.
John J. Davenport (14386950)   +3 more
core   +1 more source

Finetuning Discrete Architectural Surfaces by use of Circle Packing

open access: yesJournal of Asian Architecture and Building Engineering
This paper presents an algorithmic approach for the conceptual design of architectural surfaces represented by triangulated meshes. Specifically, we propose a method to optimise a surface according to user-specified geometric properties including the ...
Shizuo Kaji, Jingyao Zhang
doaj   +1 more source

A design tool for globally developable discrete architectural surfaces using Ricci flow

open access: yesJapan Architectural Review, 2023
This paper presents an approach for the design of discrete architectural surfaces that are globally developable; that is, having zero Gaussian curvature at every interior node.
Jingyao Zhang, Makoto Ohsaki
doaj   +1 more source

Simulation study and parameter optimization of laser TSV using artificial neural networks

open access: yesJournal of Materials Research and Technology, 2023
Through-Silicon Vias (TSV) play an important role in the field of semiconductor 3D packaging by providing interconnections during layer-by-layer stacking.
Dileep Karnam, Yu-Lung Lo, Chia-Hua Yang
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

A Tabu Search Approach for the Circle Packing Problem [PDF]

open access: yes, 2014
This paper concerns the problem to place N non overlapping circles in a circular container with minimum radius. This is a well known and widely studied problem with applications in manufacturing and logistics and, in particular, to problems related to ...
Carmine Cerrone   +8 more
core   +1 more source

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