Results 21 to 30 of about 775,463 (344)

Fitting Planar Graphs on Planar Maps [PDF]

Journal of Graph Algorithms and Applications, 2014
Graph and cartographic visualization have the common objective to provide intuitive understanding of some underlying data. We consider a problem that combines aspects of both by studying the problem of fitting planar graphs on planar maps. After providing an NP-hardness result for the general decision problem, we identify sufficient conditions so ...
Tamara Mchedlidze, Stephen G. Kobourov, Michael Kaufmann, Md. Jawaherul Alam   +3 more
openaire   +3 more sources

Circularly Polarized Broadband Printed Antenna for Wireless Applications

Sensors, 2018
A simple, compact sickle-shaped printed antenna with a slotted ground plane is designed and developed for broadband circularly polarized (CP) radiation.
Md. Samsuzzaman, Mohammad Tariqul Islam
doaj   +1 more source

Applying the Czédli-Schmidt Sequences to Congruence Properties of Planar Semimodular Lattices

Discussiones Mathematicae - General Algebra and Applications, 2021
Following Grätzer and Knapp, 2009, a planar semimodular lattice L is rectangular, if the left boundary chain has exactly one doubly-irreducible element, cl, and the right boundary chain has exactly one doubly-irreducible element, cr, and these elements ...
Grätzer G.
doaj   +1 more source

Method for Selecting the Functioning Modes of the Carriage Drive of Probe Equipment during Transient Processes Providing Minimization of Probing Cycle Duration. Part 1. Method for Studying Mechanical Oscillations of the Object Stage Drive

Механика машин, механизмов и материалов, 2022
The article presents the results of the analysis of preliminary studies of mechanical vibrations with a natural frequency of the object stage of the probe equipment.
Alexei V. Kozinets, Vladimir L. Basiniuk, Rita E. Volkotrub   +2 more
doaj   +1 more source

Planar and Quasi-Planar Simultaneous Geometric Embedding [PDF]

The Computer Journal, 2014
A simultaneous geometric embedding SGE of two planar graphs G 1 and G 2 with the same vertex set is a pair of straight-line planar drawings Γ1 of G 1 and Γ2 of G 2 such that each vertex is drawn at the same point in Γ1 and Γ2. Many papers have been devoted to the study of which pairs of graphs admit a SGE, and both positive and negative results have ...
DI GIACOMO, Emilio, DIDIMO, WALTER, LIOTTA, Giuseppe, Meijer, Henk, Wismath, Stephen K.   +4 more
openaire   +2 more sources

Method of Selecting the Operation Parameters of Electric Spindle with Aerostatic Supports for Separation of Semiconductor Plates to Crystals. Parts 2–3

Механика машин, механизмов и материалов, 2021
The article presents the results of studies of the shaft oscillation processes of a precision horizontal highspeed electric spindle with aerostatic radial and axial supports, used at Planar OJSC in equipment for separation of semiconductor plates into ...
Alexander E. Kovensky, Vladimir L. Basiniuk, Ryta E. Volkotrub   +2 more
doaj   +1 more source

Enhanced photovoltage for inverted planar heterojunction perovskite solar cells

Science, 2018
Perovskite layers make the grade Inverted planar perovskite solar cells offer opportunities for a simplified device structure compared with conventional mesoporous titanium oxide interlayers.
Deying Luo, Wenqiang Yang, Zhiping Wang, A. Sadhanala, Qin Hu, Rui Su, Ravichandran Shivanna, G. Trindade, J. Watts, Zhaojian Xu, Tanghao Liu, Ke Chen, Fengjun Ye, Pan Wu, Lichen Zhao, Jiang Wu, Yongguang Tu, Yifei Zhang, Xiaoyu Yang, Wei Zhang, R. Friend, Q. Gong, H. Snaith, Rui Zhu   +23 more
semanticscholar   +1 more source

Multilevel Planarity

Journal of Graph Algorithms and Applications, 2018
In this paper, we introduce and study multilevel planarity, a generalization of upward planarity and level planarity. Let $G = (V, E)$ be a directed graph and let $\ell: V \to \mathcal P(\mathbb Z)$ be a function that assigns a finite set of integers to each vertex.
Barth, Lukas, Brückner, Guido, Jungeblut, Paul, Radermacher, Marcel   +3 more
openaire   +5 more sources

Clustered Planarity = Flat Clustered Planarity [PDF]

, 2018
The complexity of deciding whether a clustered graph admits a clustered planar drawing is a long-standing open problem in the graph drawing research area. Several research efforts focus on a restricted version of this problem where the hierarchy of the clusters is "flat", i.e., no cluster different from the root contains other clusters.
Maurizio Patrignani, Pier Francesco Cortese   +1 more
openaire   +2 more sources

Enumerating Hamiltonian Cycles in a Planar Graph Using Combinatorial Cycle Bases

Journal of Applied Computer Science & Mathematics, 2016
Cycle bases belong to a k-connected simple graph used both for listing and enumerating Hamiltonian cycles contained in a planar graph. Planar cycle bases have a weighted induced graph whose weight values limited to 1.
Retno MAHARESI
doaj   +1 more source