Results 61 to 70 of about 23,983 (294)

Radial Level Planarity Testing and Embedding in Linear Time

open access: yesJournal of Graph Algorithms and Applications, 2005
A graph with an ordered k-partition of the vertices is radial level planar if there is a strictly outward drawing on k concentric levels without crossings.
Christian Bachmaier   +2 more
doaj   +1 more source

Atomic Embeddability, Clustered Planarity, and Thickenability

open access: yes, 2020
We study the atomic embeddability testing problem, which is a common generalization of clustered planarity (c-planarity, for short) and thickenability testing, and present a polynomial time algorithm for this problem, thereby giving the first polynomial ...
Tóth, Csaba D., Fulek, Radoslav
core   +1 more source

Digital Light Processing of Thermoplastic Poly(methyl methacrylate) Photoresin Combined With Solvent Vapor Smoothing

open access: yesAdvanced Engineering Materials, EarlyView.
A thermoplastic PMMA‐based photoresin enables high‐resolution DLP printing followed by solvent‐vapor smoothing. The treatment reduces staircase‐induced surface roughness from 2.33 µm to 129 nm and increases visible‐light transmittance from approximately 30% to 80%, providing a route toward transparent PMMA components for rapid prototyping and non ...
Rozhin Heydarpour   +5 more
wiley   +1 more source

Hanani-Tutte for Radial Planarity

open access: yesJournal of Graph Algorithms and Applications, 2017
A drawing of a graph $G$ is radial if the vertices of $G$ are placed on concentric circles $C_1, \ldots, C_k$ with common center $c$, and edges are drawn radially: every edge intersects every circle centered at $c$ at most once.
Radoslav Fulek   +2 more
doaj   +1 more source

Influence of Particle Shape and Size in Copper‐Based Low‐Temperature Metallization Paste for Solar Cells

open access: yesAdvanced Engineering Materials, EarlyView.
Particle morphology controls the balance between printability and electrical connectivity in low‐temperature AgCu/Ag metallization pastes. Flake‐shaped AgCu particles form extended low‐resistance contacts, whereas spherical particles favor processability at high metal loading. Fine Ag particles further tune void filling and conductive‐network formation
O. Mhirsi   +3 more
wiley   +1 more source

Analysis of the response surface method for optimising the flatness of ceramic-metal brazing

open access: yesHanjie xuebao
Ceramic-to-metal packaging is widely used as a key process in electronic vacuum devices in integrated circuit packaging, medical devices, and defence.The flatness of the two connections determines the reliability of the chip, and it is of great ...
Guanghui WANG   +4 more
doaj   +1 more source

Quantitative Criteria for Solvent Selection in Liquid-Phase Exfoliation: Balancing Exfoliation and Stabilization Efficiency

open access: yesNanomaterials
The selection of solvent is pivotal in liquid-phase exfoliation (LPE), as an ideal solvent minimizes the energy required to disrupt the interlayer attractive interactions while stabilizing exfoliated layers to prevent re-agglomeration.
Shunnian Wu   +3 more
doaj   +1 more source

Overlapping Cluster Planarity

open access: yesJournal of Graph Algorithms and Applications, 2008
This paper investigates a new direction in the area of cluster planarity by addressing the following question: Let G be a graph along with a hierarchy of vertex clusters, where clusters can partially intersect.
Walter Didimo   +2 more
doaj   +1 more source

Fan-planarity: Properties and complexity [PDF]

open access: yes, 2015
In a fan-planar drawing of a graph an edge can cross only edges with a common end-vertex. Fan-planar drawings have been recently introduced by Kaufmann and Ueckerdt [35], who proved that every n-vertex fan-planar drawing has at most 5. n-.
Binucci, Carla   +6 more
core   +1 more source

Microstructural, Mechanical, and Textural Evolution of Dissimilar Combination of Laser‐Welded Maraging Steel and 4340 Steel

open access: yesAdvanced Engineering Materials, EarlyView.
The present work reports the microstructural, mechanical, and texture evolution of a dissimilar combination laser‐welded maraging steel with 4340 steel. This is important for aerospace applications. The demand for dissimilar welding is growing rapidly with the requirement of efficient and durable joints.
Bharat Behl   +3 more
wiley   +1 more source

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