1. Geometrijske in mehanske lastnosti celičnih metamaterialovNejc Novak, Branko Nečemer, 2025 Abstract: Učbenik z naslovom "Mehanske in geometrijske lastnosti celičnih metamaterialov" je namenjen kot študijsko gradivo pri predavanjih predmetov Konstruiranje s celičnimi gradivi in Dimenzioniranje lahkih konstrukcij za študente Univerze v Mariboru. Učbenik temelji na raziskavah naprednih metamaterialov, ki združujejo edinstvene mehanske in geometrijske lastnosti. Vsebuje pregled sodobnih celičnih metamaterialov in izdelovalnih tehnologij, uporaba eksperimentalnih in numeričnih pristopov, ter izsledke opravljenih raziskav mehanske in geometrijske karakterizacije. Vsebina učbenika je v skladu z učnimi načrti omenjenih predmetov.
Keywords: celični metamateriali, mehanske lastnosti, geometrijske lastnosti, mehansko testiranje, računalniške simulacije
Published in DKUM: 13.05.2025; Views: 0; Downloads: 0
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2. Primerjava algoritmov Apriori in GSP nad podatki Covid-19 z osredotočenjem na časovno dimenzijoVita Kulčar, 2025, undergraduate thesis Abstract: Diplomsko delo se osredotoča na uporabo metod podatkovnega rudarjenja, specifično, na odkrivanje asociativnih pravil. V uvodu so predstavljeni osnovni pojmi in tehnike rudarjenja, vključno z merami zanimivosti, ki se uporabljajo za analizo povezanosti med različnimi elementi v podatkih. Delo podrobno opisuje algoritem Apriori in algoritem posplošenih zaporednih vzorcev, njune prednosti in slabosti ter implementacijo za generiranje pogostih vzorcev in oblikovanje pravil. Osredotoča se tudi na analizo podatkov z upoštevanjem časovne dimenzije in preučevanje rezultatov rudarjenja, vključno z vizualizacijo in interpretacijo ugotovitev.
Keywords: algoritem Apriori, algoritem GSP, asociativna pravila, rudarjenje velepodatkov
Published in DKUM: 08.05.2025; Views: 0; Downloads: 2
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3. Notranji nadzor pitne vode v zdravstveni ustanovi in načrt ukrepanja ob izrednih dogodkih : magistrsko deloGoran Novak, 2025, master's thesis Abstract: V magistrskem delu sta obravnavana notranji nadzor pitne vode v zdravstveni ustanovi in načrt ukrepanja ob izrednih dogodkih. Namen raziskave je bil ugotoviti delež zdravstvene ustreznosti in skladnosti pitne vode v interni vodovodni napeljavi javnega zdravstvenega zavoda Univerzitetni klinični center Maribor, raziskati učinkovitost letnega načrta spremljanja zdravstvene ustreznosti in skladnosti pitne vode ter primerjati zdravstveno ustreznost in skladnost pitne vode med lokacijo Maribor in lokacijo Slivniško Pohorje. Uporabljene metode so vključevale vzorčenje in laboratorijsko preskušanje pitne vode na parametre iz Uredbe o pitni vodi. Magistrsko delo temelji na rezultatih mikrobiološkega preskušanja pitne vode, odvzetih vzorcih v času med 1. januarjem 2013 in 31. decembrom 2021. Skupno je bilo analiziranih 1.642 vzorcev pitne vode, od katerih je bilo 95,2 % skladnih z mejnimi vrednostmi parametrov iz Uredbe o pitni vodi. Delež zdravstvene ustreznosti in skladnosti pitne vode, vzorčenih na interni vodovodni napeljavi zdravstvenih objektov UKC Maribor na lokaciji Maribor, je bil višji kot delež zdravstvene ustreznosti in skladnosti pitne vode, vzorčenih na interni vodovodni napeljavi zdravstvenega objekta UKC Maribor na lokaciji Slivniško Pohorje. Ugotovljeno je, da dosledno izvajanje preventivnih in korekcijskih ukrepov bistveno pripomore k izboljšanju zdravstvene ustreznosti in skladnosti pitne vode. S tem magistrskim delom je omogočen hitrejši vpogled nad obvladovanjem bolnišničnih okužb s področja oskrbe z zdravstveno ustrezno pitno vodo. V prihodnje je priporočeno dosledno izvajanje notranjega nadzora in preventivnih ukrepov za zagotavljanje zdravstveno ustrezne in skladne pitne vode, redno posodabljanje načrta ukrepanja ob izrednih dogodkih ter izobraževanja osebja glede pomena zagotavljanja ustrezne kakovosti pitne vode.
Keywords: pitna voda, notranji nadzor, zdravstvena ustreznost, načrt ukrepanja ob izrednih dogodkih, interna vodovodna napeljava
Published in DKUM: 05.05.2025; Views: 0; Downloads: 8
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4. Organizacija in organiziranje2025 Abstract: Sodobna družba je družba organizacij. Organizacije so prostor, kjer se ljudje nahajamo v različnih oblikah, različnih dejavnostih in zasledujemo različne interese in cilje. Ravno tako se vprašanje organizacije skozi institucionalno, instrumentalno opredelitev in skozi oblikovanje organizacije razvija že od samih začetkov vzpostavitve znanstvenega raziskovanja s področja organizacijskih ved. Vprašanja, ki so vezana na organizacijo in organiziranje, izhajajo najprej iz percepcije človeka in razumevanja zakonitosti organizacij, ki jih je potrebno upoštevati tako v formalnem kot v neformalnem pogledu. V znanstveni monografiji z naslovom Organizacija in organiziranje smo povezali vsebinsko zaokrožena poglavja, ki so nastala v avtorstvu in soavtorstvu visokošolskih učiteljev in sodelavcev ter doktorskih študentov. Tematski sklopi so vezani na področja organizacije, saj upoštevajo kadrovski, procesni in informacijski vidik. Obravnavajo torej področje treh glavnih stebrov organizacije, ki skozi zgodovino pomenijo tudi odskočno desko za bodoči razvoj in raziskovanje organizacijskih ved.
Keywords: organizacija, kompetence, družbena odgovornost, komunikacija, kakovost
Published in DKUM: 18.04.2025; Views: 0; Downloads: 8
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5. Problematika zadržanja mladega kadra v podjetjihLucija Sirk, 2025, master's thesis Abstract: Sodobne organizacije se soočajo z izzivom zadržanja zaposlenih, zlasti mladih, ki pogosto zapuščajo delovna mesta zaradi pomanjkanja vlaganja v njihov razvoj, neustreznega vodenja ali slabega delovnega okolja. Prvi del magistrskega dela zajema pregled obstoječe literature o zadrževanju mladega kadra v podjetjih, razlikah med zaposlenimi milenijci in generacijo Z, zavzetosti zaposlenih in dobrih vodjah. Drugi del zajema empirično raziskavo vzrokov za odhod mladih zaposlenih iz podjetij. Raziskavo smo izvedli med naključno izbranimi posamezniki, mlajšimi od 35 let, ki so v zadnjih dveh letih zapustili podjetje, v katerem so bili zaposleni. Zastavili smo si tri cilje, in sicer smo pri prvem raziskali, kako vodenje, kompetence vodij in komunikacija v obliki letnih oziroma polletnih razgovorov vplivajo na zadovoljstvo in zadržanje mladih zaposlenih v podjetju. Pri drugem cilju smo ugotavljali, v kolikšni meri vpliva na odločitev posameznika za menjavo delodajalca plača, pri tretjem cilju pa smo preverjali, kateri so najpogostejši razlogi, da mladi odhajajo iz podjetij v Sloveniji.
Ugotovili smo, da imata največjo vlogo za zadržanje mladega kadra v podjetjih vodja in management podjetij. Ugotovili smo, da kompetence vodje vplivajo na zadovoljstvo zaposlenih. Analiza je pokazala, da zadovoljstvo s plačo ni odvisno od spola in da je največji dejavnik za odhod iz prejšnjega podjetja plača. Glavni dejavnik, zaradi katerega bi mladi zaposleni v naslednjih 12 mesecih zapustili trenutno podjetje, je vodenje in management. Predlagamo, da podjetja vlagajo v razvoj vodij z uporabo coachinga, ki izboljša njihove veščine poslušanja, postavljanja vprašanj in sodelovalnega vodenja. Redni razgovori z mladimi zaposlenimi ter personaliziran pristop krepijo njihovo motivacijo, zadovoljstvo pri delu in zadrževanje talentov.
Keywords: zadržanje mladega kadra, fluktuacija, zavzetost zaposlenih, vzroki za odhod mladega kadra
Published in DKUM: 15.04.2025; Views: 0; Downloads: 8
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6. Evaluation of ▫$Au/ZrO_2$▫ catalysts prepared via postsynthesis methods in ▫$CO_2$▫ hydrogenation to methanolT. Vikram Sagar, Janez Zavašnik, Matjaž Finšgar, Nataša Novak Tušar, Albin Pintar, 2022, original scientific article Abstract: Au nanoparticles supported on ZrO2 enhance its surface acidic/basic properties to produce
a high yield of methanol via the hydrogenation of CO2. Amorphous ZrO2-supported 0.5–1 wt.% Au
catalysts were synthesized by two methods, namely deposition precipitation (DP) and impregnation
(IMP), characterized by a variety of techniques, and evaluated in the process of CO2 hydrogenation
to methanol. The DP-method catalysts were highly advantageous over the IMP-method catalyst. The
DP method delivered samples with a large surface area, along with the control of the Au particle
size. The strength and number of acidic and basic sites was enhanced on the catalyst surface. These
surface changes attributed to the DP method greatly improved the catalytic activity when compared
to the IMP method. The variations in the surface sites due to different preparation methods exhibited
a huge impact on the formation of important intermediates (formate, dioxymethylene and methoxy)
and their rapid hydrogenation to methanol via the formate route, as revealed by means of in situ
DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) analysis. Finally, the rate of
formation of methanol was enhanced by the increased synergy between the metal and the support.
Published in DKUM: 10.04.2025; Views: 0; Downloads: 4
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7. Faculty of Mechanical Engineering : Research Guide2025, guide book Abstract: The publication presents an overview of research activities and research achievements at the Faculty of Mechanical Engineering. The following research areas are presented: Energy, process and environmental engineering, Construction and design, Materials technology, Mechanics, Production engineering, Textile materials and design, and Fundamental and general areas. Individual laboratories and centers of the faculty present their research equipment, service offerings for industry, collaborations with companies and other institutions, the most prominent publications, patents, national and international projects and the most important research achievements.
Keywords: energy, construction and design, process and environmental engineering, materials technology, mechanics, production engineering, textile materials and design
Published in DKUM: 01.04.2025; Views: 0; Downloads: 2
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8. In-plane deformation behavior and the open area of rotating squares in an auxetic compound fabricPolona Dobnik-Dubrovski, Nejc Novak, Matej Borovinšek, Matej Vesenjak, Zoran Ren, 2022, original scientific article Abstract: A conventional compound fabric was used to develop a modern, multifunctional material
with an auxetic behaviour and a tailored open area for particle filtration. Such material was produced
using traditional textile technology and laser cutting, to induce a rotating squares unit geometry. The
behaviour was investigated of three different rotating unit cell sizes. The laser slit thickness and the
length of the hinges were equal for all three-unit cells. The tensile properties, Poisson’s ratio and
auxetic behaviour of the tested samples were investigated, especially the influence of longitudinal
displacement on the fabric’s open area and the filtered particle sizes (average and maximum). Results
show that the developed compound fabric possesses an average negative Poisson’s ratio of up to
−1, depending on the applied auxetic geometry. The larger rotating cell size samples offer a higher
average negative Poisson’s ratio and a higher breaking strength due to the induced slits. The findings
highlight the usefulness of patterned cuts in conventional textile materials to develop advanced
auxetic textile materials with tailored geometrical and mechanical properties.
Keywords: compound textile material, auxetic structure, open area, filtration, mechanical properties, Poisson’s ratio
Published in DKUM: 25.03.2025; Views: 0; Downloads: 3
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9. 44th International Conference on Organizational Science Development : Human Being, Artificial Intelligence and Organization, Conference Proceedings2025, proceedings of peer-reviewed scientific conference contributions (international and foreign conferences) Abstract: The 44th International Scientific Conference on the Development of Organisational Science was focused on developing and advancing knowledge in the organisational sciences, with a focus on the contemporary challenges and opportunities of our time. On the one hand, it is humans who have woven the knowledge of organisations and will continue to enrich the knowledge of organisations in the future. On the other hand, we need to take into account the situational factors and the wider environment that are intrinsic to understanding organisations. The title of this year's conference is: Human being, Artificial Intelligence and the Organisation. The society we live in today is going through a period of great change in various areas of our lives. Although our pace sometimes stops, the forces of the environment do not. The pace of change often no longer surprises us. But the pillars of our action, the achievements of human society, are something of which we can be justly proud. Artificial intelligence is one of the forces that has entered our everyday lives in many places in recent times. Where are the opportunities and where are the dangers of artificial intelligence, where is human intelligence still a significant step ahead of artificial intelligence?
Keywords: organization, human being, artificial intelligence, changes, organizational development
Published in DKUM: 20.03.2025; Views: 0; Downloads: 28
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10. Total Knee replacement with an uncemented porous tantalum tibia component: A failure analysisSamo K. Fokter, Nenad Gubeljak, Esther Punzón Quijorna, Primož Pelicon, Mitja Kelemen, Primož Vavpetič, Jožef Predan, Luka Ferlič, Igor Novak, 2022, original scientific article Abstract: Porous tantalum has been extensively used in orthopaedic surgery, including uncemented
total knee arthroplasty (TKA). Favourable results were reported with earlier monobloc tibial components and the design evolved to modular implants. We aimed to analyse possible causes for extensive
medial tibia bone loss, resulting in modular porous tantalum tibia baseplate fracture after primary
TKA. Retrieved tissue samples were scanned with 3 MeV focused proton beam for Proton-Induced
X-ray Emission (micro-PIXE) elemental analysis. Fractographic and microstructural analysis were
performed by stereomicroscopy. A full 3D finite-element model was made for numerical analysis
of stress–strain conditions of the tibial baseplate. Histological examination of tissue underneath
the broken part of the tibial baseplate revealed dark-stained metal debris, which was confirmed by
micro-PIXE to consist of tantalum and titanium. Fractographic analysis and tensile testing showed
that the failure of the tibial baseplate fulfilled the criteria of a typical fatigue fracture. Microstructural
analysis of the contact surface revealed signs of bone ingrowth in 22.5% of the surface only and
was even less pronounced in the medial half of the tibial baseplate. Further studies are needed to
confirm the responsibility of metal debris for an increased bone absorption leading to catastrophic
tibial tray failure.
Keywords: total knee arthroplasty, uncemented, cementless, trabecular metal, porous tantalum, tibial component, cementless baseplate fracture
Published in DKUM: 20.03.2025; Views: 0; Downloads: 2
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