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1.
Izgradnja električnega ojačevalnika za piezoelektrični aktuator
Gregor Korže, 2022, diplomsko delo

Opis: V okviru diplomskega dela je bil izdelan hladilni sistem za električni ojačevalnik, ki ga uporabljamo za napajanje piezoelektričnih aktuatorjev. Preračunali smo temperature spoja ojačevalnika, izbrali ustrezen hladilnik in določili ustrezne ventilatorje za aktivno hlajenje sistema. Električni ojačevalnik smo nato testirali pri vhodnih signalih različnih frekvenc in amplitud, ob tem pa smo opazovali izhodni signal in temperaturo ohišja močnostnega ojačevalnika PB51. S programom Apex Power Design smo opravili analizo stabilnosti sestavljenega električnega ojačevalnika. Za lažje in bolj kvalitetno zajemanje fotografij in posnetkov smo 3d natisnili tudi nastavek za mobilni telefon, ki se pritrdi na okular mikroskopa. Tako lahko sedaj zajemamo počasne posnetke kroženja vode na mikroskopskem stekelcu, kar nam bo olajšalo nadaljnje raziskave na področju mikrofluidnih motorjev.
Ključne besede: Močnostni ojačevalnik, piezoelektrični aktuator, hladilni sistem, 3d tiskanje, SolidWorks, Apex Power Design.
Objavljeno v DKUM: 19.09.2022; Ogledov: 26; Prenosov: 2
.pdf Celotno besedilo (4,05 MB)

2.
Importance of business models in circular economy : bachelor thesis
Fernández Gómez Raquel, 2022, diplomsko delo

Opis: This bachelor thesis studies and analyzes the importance of business models in the Circular Economy. The company studied is an SME, i.e. 10 to 250 employees. The smaller companies are mainly confronted with the problem of resources, and the larger ones with their strategic orientation. The aim is to generate a guideline or way of doing that serves as a model for the SMEs already created so that the transition from the Linear Economy, which is still predominant today, to a Circular Economy. The idea is, after the study, a real case study of SMEs working with the premises of CE to establish a market model that follows the same. To support changes, we have documented the different business models currently in use, choosing the Canvas Business Model for several reasons and making the various changes necessary to make this a sustainable and circular model. In addition, it is established that the process of innovation and modification must be applied as a continuous cyclical process. If the company wants to be successful, it is a continuous cycle model, which should never stop.
Ključne besede: Business Models for Circular Economy, Business Model Canvas, Industrial symbiosis, Ressource efficciency, Synergies, Sustainable development, CE in SMEs, Circular Economy, Product Sustainable Design.
Objavljeno v DKUM: 12.07.2022; Ogledov: 122; Prenosov: 7
.pdf Celotno besedilo (3,43 MB)

3.
Uporaba tehnologije React Redux pri razvoju spletne aplikacije za prodajo in nakup kriptovalut : diplomsko delo
Klara Gicheva, 2022, diplomsko delo

Opis: V okviru diplomske naloge smo obravnavali eno najbolj privlačnih tehnologij danes, to so kriptovalute, njihova prodaja in nakup, torej trgovanje s kriptovalutami. Projekt vključuje številne tehnologije, ogrodja in knjižnice. Knjižnici React Redux in Redux Toolkit zavzemata glavno mesto tukaj. Logiko Redux uporabljamo za izgradnjo uporabniškega vmesnika in upravljanje celotnega stanja aplikacije. Projekt je sestavljen iz več strani, kot so seveda registracija in prijava uporabnikov, profil, nakup in prodaja kriptovalut v denar in obratno, kripto denarnica in zgodovina vseh do sedaj opravljenih transakcij.
Ključne besede: spletna aplikacija, kriptovalut, trgovanje, React, React Redux, Redux Toolkit, ANT DESIGN, TypeORM
Objavljeno v DKUM: 27.06.2022; Ogledov: 265; Prenosov: 92
.pdf Celotno besedilo (2,48 MB)

4.
Parametrični vplivi na kakovost in zanesljivost merilnega vezja : učbenik
Vojko Matko, 2022, učbenik

Opis: Vsebina obsega vplive posameznih parametrov na kakovost in zanesljivost merilnega vezja. Parametrični pristop daje zelo natančen kakovostni pregled nad vplivi parametrov vezja, vplivnimi količinami in tudi optimiranju merilnih vezij v smislu “ECO (Ecology) design-a”. Ta je predpisan z evropsko direktivo 2009/125 /CE in postavlja okvir za določitev zahtev za okoljsko primerno zasnovo izdelkov, povezanih s čim manjšo porabo električne energije. Ob upoštevanju te direktive pa moramo ob zmanjšanju porabe energije posameznih vezij tudi preverjati kakovost in zanesljivost delovanja, kar je v tem učbeniku osredotočeno na področje merilne negotovosti merilnih vezij. Pomembne pridobitve parametričnega pristopa so, da v končni analizi dobimo informacijo o velikostnih redih posameznih parametričnih vplivov, da izboljšamo kakovost v smislu izboljšanja merilne negotovosti ob sočasnem zmanjšanju porabe električne energije in predvsem, da dobimo informacijo kako izboljšati vezje. Vsebina te publikacije je splošno uporabna tudi pri drugih predmetih študija splošne elektrotehnike.
Ključne besede: vpliv parametrov, analize parametrov, merilna negotovost, zanesljivost delovanja, »eco design«
Objavljeno v DKUM: 25.05.2022; Ogledov: 219; Prenosov: 37
.pdf Celotno besedilo (22,80 MB)
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5.
Suitability of Hydrogen Fuel Cell Powertrain for High-Performance Sports Cars : diplomsko delo
Dominik Ozmec, 2021, diplomsko delo

Opis: This bachelor´s thesis describes the development of Hydrogen Fuel Cell powertrain based on the case of the Tushek TS900 hybrid car. We wanted to see if a hydrogen fuel cell-powered vehicle could achieve comparable performance compared to an existing hybrid vehicle. We have built a Fuell Cell propulsion model for the high-performance sports car Tushek TS900, then we presented the basics and principles of the powertrains itself, and its connections. We performed vehicle acceleration simulations and compared them with a hybrid powertrain powered vehicle.
Ključne besede: hydrogen fuel cells, sports cars, powertrain design, car characteristics, driving simulation
Objavljeno v DKUM: 16.02.2022; Ogledov: 210; Prenosov: 32
.pdf Celotno besedilo (3,24 MB)

6.
Oblikovanje multifunkcionalnega stojala za gojenje zelišč v stanovanju : magistrsko delo
Monika Hudournik, 2022, magistrsko delo

Opis: Ljudje se vedno bolj zavedajo prednosti sveže in naravno pridelane hrane, ki jo je vedno težje najti. Tudi zelišča, ki jih uporabljamo skozi celo leto. Veliko ljudi želi gojiti zelišča v stanovanju, vendar imajo velikokrat premalo prostora in neprimerne pogoje za gojenje ter premalo časa in znanja za vzgojo rastlin. Z razvojem izdelka, osredotočenim na uporabnika, ki je potekal skozi faze metode design thinking, smo oblikovali multifunkcionalni sobni vrtiček z ambientalno lučjo. Ta bo omogočal enostavno gojenje več zelišč na majhnem prostoru in v stanovanje prinesel košček narave, ob katerem se bo uporabnik lahko sprostil.
Ključne besede: produktno oblikovanje, design thinking, notranji vrt, zelišča, multifunkcionalnost, modularnost
Objavljeno v DKUM: 26.01.2022; Ogledov: 296; Prenosov: 47
.pdf Celotno besedilo (5,93 MB)

7.
Retaining structure in demanding ground conditions: PK-16, road Hrastnik - Zidani Most : master's thesis
Aleksandr Sokolov, 2021, magistrsko delo

Opis: The master thesis presents the findings of the review of the design documentation of PGD plans for the PK-16 retaining structure, reconstruction of the G2-108 Hrastnik - Zidani Most road and deviation of the G1-5 Rimske Toplice - Zidani Most - Radeče road. The PK 16 retaining structure is foreseen between the Sava riverbed and the new road. The length of the retaining structure is substaintal (approx. 1140 m), the morphology of the terrain along the wall varies greatly. However, due to the erosion of the Sava River, it is estimated that the wall will need to be deep or corrosion protection should be constructed. Temporary security and work platforms based on the Sava River Basin (which is already impounded and quite deep in this part) will be required. The retaining structure is designed as a vertical cantilever wall that is on the underside rigidly fixed to the horizontal foundation plate. On the bulk of the structure, the foundation plate is supported by piles in two rows. The vertical wall at the top passes into a horizontal cantilever along which a corridor with a fringe runs. The controlling calculations were done employing a computational 2D model that takes into account the elastoplastic Mohr - Coulomb model for soil and the elastic model of concrete structures. The accompanying geotechnical calculations of the retaining structure in profiles P283 and P299 were compared with the analyses made in the design project to confirm the possibility of carrying out the proposed structures.
Ključne besede: civil engineering, geotechnical design, retaining structures, cantilever walls, piles
Objavljeno v DKUM: 13.10.2021; Ogledov: 351; Prenosov: 31
.pdf Celotno besedilo (2,99 MB)

8.
Ensemble Docking Coupled to Linear Interaction Energy Calculations for Identification of Coronavirus Main Protease (3CLpro) Non-Covalent Small-Molecule Inhibitors
Marko Jukič, Dušanka Janežič, Urban Bren, 2020, izvirni znanstveni članek

Opis: SARS-CoV-2, or severe acute respiratory syndrome coronavirus 2, represents a new strain of Coronaviridae. In the closing 2019 to early 2020 months, the virus caused a global pandemic of COVID-19 disease. We performed a virtual screening study in order to identify potential inhibitors of the SARS-CoV-2 main viral protease (3CLpro or Mpro). For this purpose, we developed a novel approach using ensemble docking high-throughput virtual screening directly coupled with subsequent Linear Interaction Energy (LIE) calculations to maximize the conformational space sampling and to assess the binding affinity of identified inhibitors. A large database of small commercial compounds was prepared, and top-scoring hits were identified with two compounds singled out, namely 1-[(R)-2-(1,3-benzimidazol-2-yl)-1-pyrrolidinyl]-2-(4-methyl-1,4-diazepan-1-yl)-1-ethanone and [({(S)-1-[(1H-indol-2-yl)methyl]-3-pyrrolidinyl}methyl)amino](5-methyl-2H-pyrazol-3-yl)formaldehyde. Moreover, we obtained a favorable binding free energy of the identified compounds, and using contact analysis we confirmed their stable binding modes in the 3CLpro active site. These compounds will facilitate further 3CLpro inhibitor design.
Ključne besede: COVID-19, SARS-CoV-2, Mpro, 3CLpro, 3C-like protease, virtual screening, inhibitors, in silico drug design, free-energy calculations
Objavljeno v DKUM: 10.12.2020; Ogledov: 697; Prenosov: 97
.pdf Celotno besedilo (2,99 MB)

9.
The direct and indirect relationships between design orientation and market orientation
Sanja Rocco, 2019, doktorska disertacija

Opis: The main purpose of this doctoral thesis is to investigate the relationship between design orientation and market orientation and propose a new conceptual model. Existing models were investigated. The initial conceptual model was proposed as the starting point. The research combined qualitative and quantitative methods. Quantitative research was conducted among managers and CEOs from Croatian companies in different industries. According to the final PLS-SEM model, design orientation has a direct and significant impact on market orientation and an indirect but significant impact on business success. Managerial approach has a direct and significant impact on design orientation, as well as on market orientation of a company. The new design orientation-market orientation model contributes to both marketing and design scholars, as well as implications for marketers, designers, and managers in practice. Our findings demonstrate that companies with higher level of market orientation and supported with design orientation also have the potential for achieving better results in the market and, consequently, better financial performance. It also provides the basis for future research on the topic.
Ključne besede: market orientation, design orientation, relationships, conceptual model, implications
Objavljeno v DKUM: 22.07.2020; Ogledov: 821; Prenosov: 54
.pdf Celotno besedilo (6,06 MB)

10.
FORMULATION, PREPARATION AND CHARACTERIZATION OF NANOEMULSIONS FOR PARENTERAL NUTRITION : doctoral disertation
Dušica Mirković, 2019, doktorska disertacija

Opis: The aim of this doctoral research was to develop and optimize parenteral nanoemulsions as well as the total parenteral nutrition (TPN) admixture containing a nanoemulsion obtained in the course of the optimization process (hereinafter referred to as optimal nanoemulsion), and to examine their physicochemical and biological quality as well. In addition, the quality of the prepared nanoemulsions was compared with the quality of the industrial nanoemulsion (Lipofundin® MCT/LCT 20%), and, in the end, the TPN admixture initially prepared was also compared with the admixture into which the industrial emulsion was incorporated. Parenteral nanoemulsions that were considered in this dissertation were prepared by the high-pressure homogenization method. This method is the most widely applied method for the production of nanoemulsions due to the shortest length of homogenization time, the best-obtained homogeneity of the product and the smallest droplet diameter. For the nanoemulsion formulation, preparation and optimization purposes, by using, firstly, the concept of the computer-generated fractional design, and, after that, the full experimental design, the assessment of both direct effects of different formulation and process parameters (the oil phase type, the emulsifier type and concentration, a number of homogenization cycles and the pressure under which homogenization was carried out) as well as the effects of their interactions on the characteristics of prepared nanoemulsions was performed. Monitoring the nanoemulsion physical and chemical stability parameters was carried out immediately after their preparation, and then after 10, 30 and 60 days. It included the visual inspection, the measurement of the droplet diameter (the mean and volume droplet diameter), the polydispersity index, the ζ-potential, the pH value, the electrical conductivity, and the peroxide number. After the preparation and after 60 days, the biological evaluation (the sterility test and the endotoxic test) of the prepared nanoemulsions was carried out. As far as the characterization of the TPN admixture is concerned, it included practically the same parameters. The dynamics of monitoring the characteristics of the TPN admixture was determined on the basis of practical needs of hospitalized patients (0h, 24h and 72h). The scope and comprehensiveness of this issue indicated the need to divide the doctoral dissertation into three basic stages. The first stage was preliminary. Using the 24-1 fractional factorial design, nanoemulsions for the parenteral nutrition were prepared. They contained either a combination of soybean and fish oil, or a combination of medium chain triglycerides and fish oil. In addition, the type and the amount of an emulsifier used, a number of high-pressure homogenization cycles, and the homogenization pressure, were also varied. The measurement of the above-mentioned parameters for the industrial nanoemulsion was parallely carried out (Lipofundin® MCT/LCT 20%). The objective of this part of the research was to identify critical numerical factors having the most significant effect on the characteristics that define the prepared parenteral nanoemulsions. Parameters that were singled out as the result of this stage of the research (the emulsifier concentration and a number of homogenization cycles) were used as independent variables in the second stage of the research.
Ključne besede: nanoemulsions, total parenteral nutrition admixtures, high pressure homogenization, design of experiments, optimization, analysis of variance, artificial neural networks
Objavljeno v DKUM: 07.06.2019; Ogledov: 11280; Prenosov: 7
.pdf Celotno besedilo (2,82 MB)

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