Žilinská univerzita v Žiline

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    Informačné prostredie v kontexte informačnej vedy
    (University of Žilina, 2025) Formanek, Matúš; Drozdová, Matilda
    Vysokoškolská učebnica Informačné prostredie v kontexte informačnej vedy komplexne prepája teoretické a praktické aspekty informačnej vedy, pričom nadväzuje na predchádzajúcu publikáciu Architektonické pohľady informačného prostredia. Kapitoly uvedené v tejto publikácii poskytujú čitateľom širšie a hlbšie porozumenie systému informačného prostredia. Učebnica zámerne obsahuje vizuálne rôznorodo spracované obrázky a ilustrácie, ktoré sa líšia jazykom (slovenský, anglický), štýlom aj spôsobom celkového spracovania. Tento prístup reflektuje multimodálne vnímanie informácií dnešnej generácie Z a podporuje schopnosť študentov pracovať s medzinárodným obsahom. Prepájanie viacerých jazykov a vizuálnych formátov zároveň rozvíja i kritické a kreatívne myslenie študentov. Ako autori veríme, že každá kapitola prispeje svojím dielom k objasneniu kľúčových pojmov a pridružených teórií, ktoré považujeme za relevantné k oblasti informačnej vedy. Chceme tak poskytnúť nosné vedomosti študentom magisterského štúdia v programe mediamatika a kultúrne dedičstvo, ako aj ostatným záujemcom prejavujúcim snahu hlbšie porozumieť širokému kontextu informačnej vedy. Pri tvorbe obsahu sme kládli dôraz i na aplikáciu získaných poznatkov pri riešení praktických problémov, ktoré sa objavujú v súčasnej spoločnosti.
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    Architektonické pohľady informačného prostredia
    (University of Žilina, 2025) Formanek, Matúš; Drozdová, Matilda
    Vysokoškolská učebnica Architektonické pohľady informačného prostredia je určená všetkým záujemcom, ktorí prejavujú hlbší záujem o rôzne aspekty architektúr informačného prostredia. Predovšetkým však táto kniha slúži študentom magisterského stupňa študijného programu mediamatika a kultúrne dedičstvo, ktorý je uskutočňovaný na Žilinskej univerzite v Žiline. V rámci uvedeného programu predstavuje táto učebnica prvú časť študijného materiálu k predmetu teoretické základy informačnej vedy. Druhú časť študijných materiálov tvorí ďalšia, plynule nadväzujúca učebnica, ktorá sa venuje problematike informačného prostredia v kontexte informačnej vedy.
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    Technológ - celé číslo 2/2025
    (University of Žilina, 2025)
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    Vplyv geometrie reznej hrany na tvorbu triesky a zložky reznej sily
    (University of Žilina, 2025) Mičietová, Anna; Čilliková, Mária
    This paper deals with influence of cutting edge geometry on chip formation and components of cutting force components. The insert with the flat surface is compared with the insert containing positive geometry in order to produce acceptable chip form. It was found that cutting forces components are lower for the insert having positive geometry together with the lower energy consumed for chip formation. Furthermore, the acceptable chips in the form of short sequence is developed as contrasted against the insert of flat surface producing long chips. The measured cutting force components are decomposed in order to distinguishes between the components associated with chip formation and energy consumed in the produce new surface. Chip ratio for the flat insert is more and the shearing angle is therefore less.
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    Giga casting ako technologická revolúcia vo výrobe automobilov
    (University of Žilina, 2025) Bolibruchová, Dana
    Giga casting is referred to as a technological revolution in automobile manufacturing. Large aluminium castings are increasingly used for the production of automotive vehicles, especially for electric vehicles with low weight and to reduce production costs. Since most of them are structural components loaded quasi-statically, dynamically and cyclically, the quality and quantifiable performance of extremely large aluminium castings is crucial for their production. This article briefly analyses the current state of the art in the field of giga castings, some examples of their use in the automotive industry, their benefits and advantages.
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    Opotrebenie strižníkov a ich ostrenie
    (University of Žilina, 2025) Moravec, Ján; Melo, Borislav
    The paper focuses on the issue of shear wear. Theoretical foundations are presented and an analysis of the issue of sharpening the active parts of the shear tool is also described. Sharpening the shears themselves is an important part of repairing shear tools and their required starting position before setting them on the press.
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    Analýza stavu povrchu po shot peenovaní duplexnej ocele AlSi 318
    (University of Žilina, 2025) Neslušan, Miroslav; Florková, Zuzana
    This paper deals with surface integrity and the corresponding stress state as well as surface topography after shot peening of duplex steel AlSi 318 under the variable shot-peening conditions such as number of passes and applied air pressure. It was found that the energy of shot impacts is consumed mainly by austenitic phase whereas the ferritic one is less affected. High magnitude of residual stresses is developed under the higher number of cycles as well as for the higher media pressure. Amplitude of compressive residual stresses in austenite is more as that for ferrite one. Surface roughness is decreasing along with the number of shot peening cycles and the typical crater-like surface is produced.
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    Ultrazvuková kontrola zvarov na železných materiáloch s hrúbkou do 8 mm
    (University of Žilina, 2025) Koňár, Radoslav
    The paper deals with the possibilities of inspecting butt welds on steel materials with a wall thickness of up to 8 mm using phased array ultrasonic technology. The possibility of using ultrasonic technology also for materials with a wall thickness of up to 8 mm will allow in practice the extension of ultrasonic inspections to welds that are currently inspected only by the x-ray method. Ultrasonic inspection could fully replace the x-ray test, thereby increasing the efficiency and flexibility of NDT inspections in the construction of steel structures.
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    Analýza tribologických vlastností kompozitného materiálu PA66+GF25
    (University of Žilina, 2025) Bronček, Jozef; Drbúl, Mário; Čuchor, Dávid; Madaj, Rudolf
    The aim of experiments was to acquire the knowledge that can be used in designing materials for bearing cages. The current trend is that leading bearing manufacturers are replacing metal cages in bearing construction with glass fiber (GF) reinforced polyamide (PA) cages. Experimental measurements were realized on the experimental device linear microtribometer working on the principle of method ball on plane. This method according to the standard ISO 7148-2 is standard method for tribological properties testing. The structure analysis of experimental samples was performed because of understanding of potential structure influence on material properties.
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    Vplyv precipitačného vytvrdzovania na mechanické vlastnosti nehrdzavejúcich ocelí
    (University of Žilina, 2025) Kantoríková, Elena
    The article aims to highlight the impact of heat treatment - precipitation hardening on stainless steels. Precipitation hardening allows to achieve very high mechanical properties (tensile strength and yield strength), often significantly higher than in classical austenitic or ferritic steels. The aim is to compare the theoretical conditions of heat treatment and thus increase awareness of its advantages.