Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


1 - 10 / 36
Na začetekNa prejšnjo stran1234Na naslednjo stranNa konec
1.
Nadomestni prevoz : težave nizkocenovne, neodvisne filmske produkcije
Ana Logar, 2024, diplomsko delo

Opis: Vsaka filmska produkcija je sestavljena iz predprodukcije, produkcije in postprodukcije. Diplomsko delo govori o težavah v vseh fazah ustvarjalnega procesa. Vsako poglavje se začne s prikazom, kako naj bi v profesionalnem svetu filma posamezna faza produkcije potekala, nato pa opisuje mojo lastno izkušnjo in težave, na katere smo z ekipo med ustvarjanjem naleteli. Teoretični deli so povzeti iz literature in intervjuja s slovensko asistentko režije Urško Kos. Nalogo začnem z opisom predprodukcije in njenih podpoglavj, kjer bralec lahko vidi, kaj vse je treba narediti, preden sploh lahko začnemo snemati film: od ideje do scenarija, iskanja ekipe, igralcev in lokacij ter do izposoje opreme tik pred snemanjem. Z opisom osebnega doživljanja vsake faze predprodukcije prikažem, koliko stvari gre lahko narobe že pri na videz povsem preprostih zadevah. V nadaljevanju diplomska naloga govori o produkciji filma oziroma o snemanju. Vsak snemalni dan povzamem v svojem poglavju ter opišem delo na setu med snemanjem kratkega filma. V primerjavi z navedenimi profesionalnimi okoliščinami, kjer popišem vse potrebne člane ekipe za potek snemanja, je vidno pomanjkanje ekipe v pri snemanju študentskega filma. V opisu zadnje faze, postprodukcije, naloga govori o delu na filmu po tem, ko je film posnet: od prvega pregledovanja materiala do montaže, po končani montaži slike pa urejanje barv slike in montaža zvoka. Faza ustvarjanja filma, ki pretežno poteka na računalnikih, a vendarle z raznolikimi zapleti. Zaključek je namenjen predvsem bralcem, ki se bodo v prihodnosti prvič srečevali s filmsko produkcijo. Celotna naloga je napisana z mislijo na generacije za menoj, ki se bodo s težavami filmske produkcije še srečevale, in z upanjem, da jim bo morda moja izkušnja pomagala pri prvih korakih. Zato v zaključku zapišem tudi nekaj vzpodbudnih besed.
Ključne besede: film, filmska produkcija, težave, snemanje, predprodukcija, postprodukcija, igralci, ekipa, scenarij, montaža, diplomske naloge
Objavljeno v RUNG: 30.09.2024; Ogledov: 386; Prenosov: 11
.pdf Celotno besedilo (4,13 MB)
Gradivo ima več datotek! Več...

2.
Analiza procesa in predlog rešitve izmenjave logističnih podatkov med izbranima partnerjema preskrbovalne verige skladno z globalnimi standardi : diplomsko delo
Karin Logar, 2024, diplomsko delo

Opis: Sodobni logistični procesi zahtevajo hitro in zanesljivo izmenjavo podatkov, kar je ključno za učinkovito delovanje podjetij in konkurenčnost na trgu. Glavni cilj tega dela je identificirati pomanjkljivosti v trenutnem procesu izmenjave podatkov in predlagati rešitve za njihovo odpravo. Analiza trenutnega stanja izmenjave logističnih podatkov med podjetjem Termoplasti – Plama d. o. o. in izbranim kupcem oz. partnerjem je pokazala, da obstoječi sistemi za izmenjavo podatkov med partnerjema niso dovolj učinkoviti, saj se pojavljajo težave z združljivostjo, varnostjo in natančnostjo podatkov. Na podlagi ugotovitev analize so bili pripravljeni predlogi rešitev, ki vključujejo implementacijo sodobnejših tehnologij, kot so RIP – standardizirana računalniška izmenjava podatkov in API – aplikacijski programski vmesniki, ter uvedbo globalnih standardov za izmenjavo podatkov. Na podlagi trenutnega stanja podjetja smo se odločili za posodobitev obstoječega ERP programa Navision. Predlagana rešitev predvideva avtomatizacijo procesov, uporabo standardiziranih podatkovnih formatov in protokolov ter izboljšanje varnostnih mehanizmov. Pričakovani rezultati implementacije vključujejo povečano učinkovitost, zmanjšanje napak, izboljšano varnost in hitrejše poslovne procese. S tem se bo omogočila boljša izmenjava podatkov med partnerjema, kar bo prispevalo k zanesljivejši in učinkovitejši preskrbovalni verigi. Delo zaokrožuje ugotovitev, da bo implementacija globalnih standardov za izmenjavo podatkov prinesla pomembne koristi za podjetja, priporoča pa se tudi nadaljnje raziskave in razvoj na tem področju.
Ključne besede: diplomske naloge, logistični proces, globalni standardi, logistični podatki
Objavljeno v RUNG: 24.09.2024; Ogledov: 406; Prenosov: 8
.pdf Celotno besedilo (1,21 MB)

3.
Green synthesis of Zeolitic Imidazolate Frameworks and their evaluation for ▫$CO_2$▫ capture in humid conditions : dissertation
Aljaž Škrjanc, 2024, doktorska disertacija

Opis: Emissions of green-house gasses have been in the forefront of scientific research in recent decades. One of the approaches towards reducing the amount of green gas CO2 in the atmosphere is its capture and storage with subsequent conversion where pure enough CO2 can be regenerated. While CO2 capture widely utilizes two mature technologies, amine absorption and cryogenic distillation, they both have significant downsides, in either cost or potential new danger to the environment. To that end an adsorption-based CO2 capture has seen quite a lot of interest in recently. Nanoporous materials have been extensively studied for this application, starting with zeolites, followed by aluminophosphates and also the new members of the porous materials group, the so called reticular porous materials. Metal-Organic Frameworks (MOFs), the first discovered reticular porous materials have shown very promising results for post combustion CO2 capture and recently also for in-door and direct air capture. MOFs are in general enough thermally stable for CO2 capture, their main weakness for wide applicability is sometimes lower selectivity for CO2 in real gas mixtures and lower stability in humid conditions. Zeolitic imidazolate frameworks (ZIFs), a subgroup of MOFs, have in recent years been extensively studied for sorption applications, also CO2, due to their superior stability and kinetics for vapour/gas adsorption if compared to carboxylate-based MOFs. While extensively studied, an overview of articles shows that most research is limited to a limited set group of frameworks, with ZIF-8 being used in more than half of ZIF papers. While ZIF-8 has successfully been prepared in water and even in solvent-free conditions, the rest of the ZIFs synthesis still heavily rely on solvothermal synthesis with formamide based solvent systems and synthesis times upwards of 5 days. Even in the case of ZIF-8, while greener synthesis approaches are available, dimethylformamide (DMF) synthesis still prevails in the cases tested for CO2 capture, mainly due to the increased CO2 uptake resulting from the synergistic contribution of the remaining DMF solvent in the pores. The goal of this thesis was to develop green synthesis approaches, both solvothermal and mechanochemical, for known ZIFs and then to extend the scope towards preparation of new ZIF materials. The goal for latter was to experimentally determine the optimal topology and functionality of ZIFs for CO2 adsorption in humid conditions. Model humid gas isotherms were developed and measured for a series of ZIFs with mostly SOD (sodalite) and RHO framework topologies and Zn and Ni as metal nodes. Finally, some novel bio-based binder materials were tested for the use with ZIFs. The sorption tests revealed than the SOD topology ZIFs have high potential for CO2 sorption applications, as the adsorption is rapid and further combination of terminally functionalised imidazoles in those frameworks drastically increases the frameworks affinity for CO2 at lower pressures. With most common 4,5- functionalised imidazole having hydrophilic functional groups, the challenge of competitive water sorption still remains. On the other hand some hydrophobic 4,5-substituted sodalite ZIFs, both with 4,5-dichloroimidazole, show excellent CO2 sorption and even complete hydrophobicity. The results led us to hypothesize that further research on ZIFs- for CO2 capture has to shift form 2 substituted sodalite frameworks to 4,5 substituted frameworks with strongly dipolar hydrophobic groups. The hydrophilic polar groups currently in use lead to issues with competitive water adsorption, due to their potential to form hydrogen bonds with water. Furthermore, some new agar and alginate based shaping methods were tested, as both potential binders are not environmentally toxic and are already used on the industrial scale world-wide for other applications.
Ključne besede: carbon capture, synthesis, metal-organic frameworks, zeolitic imidazolate frameworks, nanoporous materials, dissertations
Objavljeno v RUNG: 10.09.2024; Ogledov: 696; Prenosov: 21
.pdf Celotno besedilo (15,56 MB)

4.
XAS analysis of bifunctional Ni/ZSM-5 catalysts
Iztok Arčon, Hue-Tong Vu, Goran Dražić, Janez Volavšek, Gregor Mali, Nataša Zabukovec Logar, Nataša Novak Tušar, 2024, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: In a bifunctional Ni/ZSM-5 zeolite type catalyst, catalytic properties are usually tuned via varying Al and Ni contents [1]. Here we present a systematic structural study of the Ni/ZSM-5 materials by Ni K-edge XANES and EXAFS analyses, to monitor the changes of local structure and chemical state of Ni species in the catalysts as a function of Al and Ni content. A series of Ni/ZSM-5 type zeolites with different Al to Si and Ni to Si molar ratios were synthesized by a “green”, template free technique [2]. With a combination of XAS, XRD and TEM we resolved the changes in the local environment of Ni species induced by the different Al contents in the Ni/ZSM-5 catalysts. Ni species in Ni/ZSM-5 exist as NiO nanocrystals and as charge compensating Ni2+ cations. The Ni K-edge XANES and EXAFS results enabled the quantification of Ni-containing species. At a low Al to Si ratio (nAl/nSi < 0.04), the NiO nanoparticles predominate in the samples and account for over 65% of Ni phases. However, NiO is outnumbered by Ni2+ cations attached to the zeolite framework in ZSM-5 with a high Al to Si ratio (nAl/nSi = 0.05) due to a higher number of framework negative charges imparted by Al. The obtained results show that the number of highly reducible and active NiO nanocrystals is strongly correlated with the framework Al sites present in Ni/ZSM-5 zeolites.
Ključne besede: Ni EXAFS, XANES Ni/ZSM-5 catalyst
Objavljeno v RUNG: 05.07.2024; Ogledov: 897; Prenosov: 3
URL Povezava na datoteko
Gradivo ima več datotek! Več...

5.
Insight into the interdependence of Ni and Al in bifunctional Ni/ZSM-5 catalysts by Ni K-edge XAS analysis
Iztok Arčon, Hue-Tong Vu, Goran Dražić, Janez Volavšek, Gregor Mali, Nataša Zabukovec Logar, Nataša Novak Tušar, 2023, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Catalyst design is crucial for improving catalytic activity and product selectivity. In a bifunctional Ni/ZSM-5 zeolite type catalyst, catalytic properties are usually tuned via varying Al and Ni contents [1]. While changes in acid properties associated with Al sites are usually closely investigated, Ni phases, however, receive inadequate attention. Herein, we present a systematic structural study of Ni in the Ni/ZSM-5 materials by Ni K-edge XANES (X-ray absorption near edge structure) and EXAFS (extended X-ray absorption fine structure) analyses, to monitor the local structure and chemical state of Ni species in the catalysts. In combination with XRD and TEM we resolved the changes in the local environment of Ni species induced by the different Al contents of the parent ZSM-5 prepared by a “green”, template free technique [2]. Ni species in Ni/ZSM-5 exist as NiO crystals (3–50 nm) and as charge compensating Ni2+ cations. The Ni Kedge XANES and EXAFS results enabled the quantification of Ni-containing species. At a low Al to Si ratio (nAl/nSi < 0.04), the NiO nanoparticles predominate in the samples and account for over 65% of Ni phases. However, NiO is outnumbered by Ni2+ cations attached to the zeolite framework in ZSM-5 with a high Al to Si ratio (nAl/nSi = 0.05) due to a higher number of framework negative charges imparted by Al. The obtained results show that the number of highly reducible and active NiO crystals is strongly correlated with the framework Al sites present in ZSM-5 zeolites, which depend greatly on the synthesis conditions. Therefore, this kind of study is beneficial for any further investigation of the catalytic activities of Ni/ZSM-5 and other metal-modified bifunctional catalysts.
Ključne besede: Ni/ZSM-5 catalysts, Ni EXAFS, XANES
Objavljeno v RUNG: 19.09.2023; Ogledov: 1755; Prenosov: 5
URL Povezava na datoteko
Gradivo ima več datotek! Več...

6.
7.
Winning combination of Cu and Fe oxide clusters with an alumina support for low-temperature catalytic oxidation of volatile organic compounds
Tadej Žumbar, Iztok Arčon, Petar Djinović, Giuliana Aquilanti, Gregor Žerjav, Albin Pintar, Alenka Ristić, Goran Dražić, Janez Volavšek, Gregor Mali, Margarita Popova, Nataša Zabukovec Logar, Nataša Novak Tušar, 2023, izvirni znanstveni članek

Opis: A γ-alumina support functionalized with transition metals is one of the most widely used industrial catalysts for the total oxidation of volatile organic compounds (VOCs) as air pollutants at higher temperatures (280−450 °C). By rational design of a bimetal CuFe-γ-alumina catalyst, synthesized from a dawsonite alumina precursor, the activity in total oxidation of toluene as a model VOC at a lower temperature (200−380 °C) is achieved. A fundamental understanding of the catalyst and the reaction mechanism is elucidated by advanced microscopic and spectroscopic characterizations as well as by temperature-programmed surface techniques. The nature of the metal−support bonding and the optimal abundance between Cu−O−Al and Fe−O−Al species in the catalysts leads to synergistic catalytic activity promoted by small amounts of iron (Fe/Al = 0.005). The change in the metal oxide−cluster alumina interface is related to the nature of the surfaces to which the Cu atoms attach. In the most active catalyst, the CuO6 octahedra are attached to 4 Al atoms, while in the less active catalyst, they are attached to only 3 Al atoms. The oxidation of toluene occurs via the Langmuir−Hinshelwood mechanism. The presented material introduces a prospective family of low-cost and scalable oxidation catalysts with superior efficiency at lower temperatures.
Ključne besede: Iron oxide clusters, copper oxide clusters, alumina support, synergistic effect, low-temperature total catalytic oxidation, toluene, Cu, Fe XANES, EXAFS
Objavljeno v RUNG: 06.07.2023; Ogledov: 2706; Prenosov: 27
.pdf Celotno besedilo (11,05 MB)
Gradivo ima več datotek! Več...

8.
Insight into the interdependence of Ni and Al in bifunctional Ni/ZSM-5 catalysts at the nanoscale
Hue-Tong Vu, Iztok Arčon, Danilo Oliveira de Souza, Simone Pollastri, Goran Dražić, Janez Volavšek, Gregor Mali, Nataša Zabukovec Logar, Nataša Novak Tušar, 2022, izvirni znanstveni članek

Opis: Catalyst design is crucial for improving catalytic activity and product selectivity. In a bifunctional Ni/ZSM-5 zeolite type catalyst, catalytic properties are usually tuned via varying Al and Ni contents. While changes in acid properties associated with Al sites are usually closely investigated, Ni phases, however, receive inadequate attention. Herein, we present a systematic structural study of Ni in the Ni/ZSM-5 materials by using Ni K-edge XANES and EXAFS analyses, complemented by XRD and TEM, to resolve the changes in the local environment of Ni species induced by the different Al contents of the parent ZSM-5 prepared by a “green”, template free technique. Ni species in Ni/ZSM-5 exist as NiO crystals (3–50 nm) and as charge compensating Ni2+ cations. The Ni K-edge XANES and EXAFS results enabled the quantification of Ni-containing species. At a low Al to Si ratio (nAl/nSi # 0.04), the NiO nanoparticles predominate in the samples and account for over 65% of Ni phases. However, NiO is outnumbered by Ni2+ cations attached to the zeolite framework in ZSM-5 with a high Al to Si ratio (nAl/nSi ¼ 0.05) due to a higher number of framework negative charges imparted by Al. The obtained results show that the number of highly reducible and active NiO crystals is strongly correlated with the framework Al sites present in ZSM-5 zeolites, which depend greatly on the synthesis conditions. Therefore, this kind of study is beneficial for any further investigation of the catalytic activities of Ni/ZSM-5 and other metal-modified bifunctional catalysts.
Ključne besede: Ni/ZSM-5 catalysts, zeolite, Ni XANES, EXAFS
Objavljeno v RUNG: 11.05.2022; Ogledov: 2525; Prenosov: 50
.pdf Celotno besedilo (1,25 MB)
Gradivo ima več datotek! Več...

9.
Removal of copper from aqueous solutions with zeolites and possible treatment of exhaust materials
Nataša Zabukovec Logar, Iztok Arčon, Janez Kovač, Margarita Popova, 2021, izvirni znanstveni članek

Opis: The mechanism of Cu2+ loading into commercially available natural HEU-type and synthetic LTA-type zeolites for their possible use in environmental processes, such as water and air treatment applications, was studied. Elemental analysis, SEM/EDXS, XRD, XAS and XPS analyses revealed 4-fold coordination of Cu2+ cations with oxygen atoms in the pores, a predominant location of copper atoms on the surface of crystallites and retained crystallinity of zeolites throughout the processes. The post-treatment of Cu2+-loaded samples with HCl and/or NaCl solutions confirmed the predominantly reversible sorption of copper on zeolites from aqueous solutions by ion-exchange mechanism and, therefore, excellent regeneration possibilities for both types of zeolites. Furthermore, with the calcination of exhaust metal-loaded zeolites, catalysts for total toluene oxidation reaction, as a model VOC pollutant, were obtained.
Ključne besede: Cu2+ ion exchange, Total toluene oxidation, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, Zeolite
Objavljeno v RUNG: 03.06.2021; Ogledov: 2702; Prenosov: 154
URL Povezava na celotno besedilo
Gradivo ima več datotek! Več...

10.
Paradoksi pametnih skupnosti : diskurz
2021, druge monografije in druga zaključena dela

Objavljeno v RUNG: 12.04.2021; Ogledov: 2932; Prenosov: 12
URL Povezava na celotno besedilo

Iskanje izvedeno v 0.05 sek.
Na vrh