Digital Library University of West Bohemia
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Recent Submissions
Stereoid genus Heteroradulum (Basidiomycota, Auriculariales) in the Czech Republic
(2025) Kout, Jiří; Brzica, Matěj; Tomšovský, Michal
The current knowledge of the lignicolous genus Heteroradulum was clarified for the Czech Republic. The occurrences of both European species, Heteroradulum deglubens and H. kmetii,are based on field collections and herbarium specimens. Heteroradulum deglubens was collected on dead hardwoods in near-natural forests and its identity was confirmed by DNA sequences of the ITS region. Heteroradulum kmetii was collected in warmer parts of the Czech Republic only and differs from H. deglubens in its ecology. An extended host tree spectrum is confirmed for both species.
Finding the Shear Reflection Symmetry Plane in a 3D Point Cloud
(ScitePress, 2025) Poór, Vítek; Kolingerová, Ivana; Strnad, Damjan
Many objects, namely man-made ones, show signs of various types of symmetry. The most common type perceived by humans is reflection symmetry to some plane. When detecting the symmetry for geometric models, the existing algorithms look for orthogonal reflection symmetry. However, the models can be sheared, therefore, algorithms detecting shear reflection symmetry would be useful. In this paper, we propose an algorithm for detecting the plane of shear reflection symmetry in a 3D point cloud on condition that the shear was done in one of the coordinate axes.
A Library for General Genetic Algorithm with Sequential/Parallel Fitness Function Calculation
(IEEE, 2025) Potužák, Tomáš; Křenek, Filip
IIn this paper, we describe a library for Java, which enables easy usage of a genetic algorithm in a project. The library – Genetic Algorithm Library for Java (GAL4J) – contains multiple utilizable variants of individual parts of the genetic algorithm and also enables parallel computation of the fitness values of the individuals. The usability of the library was demonstrated on two classical problems. The speed of the GAL4J genetic algorithm using sequential and parallel fitness function calculation was investigated. The GAL4J was also compared to two existing GA libraries of third parties.
Zvýšení efektivity odpadového hospodářství ve výrobním podniku pomocí vizuálních, informačních a motivačních nástrojů
(Západočeská univerzita v Plzni, 2025) Bednářová, Nikola; Šimon, Michal
Článek se zabývá problematikou efektivního odpadového hospodářství v průmyslovém podniku a představuje případovou studii zaměřenou na návrh a implementaci konkrétních opatření vedoucích ke zlepšení třídění odpadu a snížení plýtvání materiálem. Na základě analýzy stávajícího stavu byly identifikovány hlavní nedostatky v systému třídění, zejména v oblasti vizualizace, informovanosti a motivace zaměstnanců. Následně byl navržen komplexní soubor nástrojů včetně nového značení nádob, vícejazyčných brožur, informačních tabulí, motivačních prvků a gamifikace. Cílem těchto opatření je zvýšit ekologické povědomí zaměstnanců a podpořit jejich aktivní zapojení do systému nakládání s odpady. Vyhodnocení účinnosti navržených změn bude provedeno firmou po uplynutí určité doby, a to formou sběru kvantitativních a kvalitativních dat.
Fabrication of Conductive Contact on Graphene Monolayers via Direct Ink Writing
(IEEE, 2025) Šorm, Martin; Štulík, Jiří; Janda, Martin; Hamáček, Aleš
This study investigates the formation of conductive contacts directly on graphene monolayers using direct ink writing (DIW). A glass substrate coated with a graphene monolayer was patterned using femtosecond laser ablation to create test lines with 200μ m width. Silver paste was deposited on the patterned graphene using DIW and then sintered at 60∘C in ambient air. The electrical properties of the resulting heterostructure were characterized by resistance, impedance, and current-voltage (I-V) measurements. The results showed that the silver-graphene interface exhibits ohmic behavior, with linear I-V characteristics and negligible effect on the conductivity of the graphene pathways. The measured resistivity values were consistent with lower values than theoretical expectations. This study demonstrates that the combination of femtosecond laser patterning and DIW provides an efficient approach to forming reliable electrical contacts for graphene-based devices, potentially as a pathway for applications in flexible electronics and sensors.