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183. Empirical observations on the interpretation of the Macedonian articles : master's thesisMetodi Efremov, 2024, magistrsko delo Opis: This thesis investigates the use and the interpretation of three alleged definite articles in Macedonian from a formal perspective. It is concerned with the following questions: (i) does Macedonian indeed have a definite article? (ii) are all three articles in Macedonian definite articles or demonstratives? (iii) what are the formal features that distinguish among these items and how are they licensed in different semantic contexts? The thesis provides evidence that Macedonian has only one definite article – the t-root one – as it presupposes uniqueness and does not have a deictic feature. The other two items – the v- and n-root articles – are at the intersection of a definite article and a demonstrative: they have a deictic feature but do not presuppose uniqueness or non-uniqueness. In addition, it is demonstrated that Macedonian has a set of three demonstratives that have a deictic feature and presuppose non-uniqueness. Ključne besede: master's thesis, semantics, definite articles, demonstrative, uniqueness, deixis, reference Objavljeno v RUNG: 12.07.2024; Ogledov: 713; Prenosov: 17 Celotno besedilo (908,04 KB) |
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185. Preface to the special issue "State-of-the-art mathematical applications in Europe"Irina Elena Cristea, Patrick Siarry, Gintautas Dzemyda, Yuriy Rogovchenko, 2024, drugi znanstveni članki Ključne besede: mathematical physics, navigation algorithm, commutative ring, hypercompositional algebra, differential equation Objavljeno v RUNG: 10.07.2024; Ogledov: 563; Prenosov: 6 Celotno besedilo (136,82 KB) Gradivo ima več datotek! Več... |
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187. Kako se približati umetninam, umetnicam in umetnikom, umetnosti?Aleš Vaupotič, 2023, samostojni strokovni sestavek ali poglavje v monografski publikaciji Opis: Razstava z naslovom Od blizu - Moderna galerija, Ljubljana, 22. 12. 2022-2. 4. 2023 - je drugačna od običajnih razstav v Moderni galeriji, od razstav v galerijah nasploh, saj na njej niso predstavljena samo umetniška dela, ampak predvsem postopki ohranjanja teh del v muzejih. Slike, kipi, tudi videi in prostorske postavitve, vse to se sčasoma spreminja ali celo poškoduje. Pose- bej usposobljene strokovnjakinje in strokovnjaki z zelo širokega področja umetniških, humanističnih in naravoslovnih disciplin si zato s svojim raziskovalnim in zahtevnim strokovnim delom pri- zadevajo ta dela čim dlje ohraniti v stanju, da jih lahko gledamo in doživljamo na razstavah. Ključne besede: Moderna galerija, dostopnost razstav, restavratorstvo, konservatorstvo Objavljeno v RUNG: 08.07.2024; Ogledov: 604; Prenosov: 5 Povezava na datoteko Gradivo ima več datotek! Več... |
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189. XAS analysis of bifunctional Ni/ZSM-5 catalystsIztok 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: 661; Prenosov: 3 Povezava na datoteko Gradivo ima več datotek! Več... |
190. Non-oxidative calcination enhances the methane dry reforming performance of ▫$Ni/CeO_{2−x}$▫ catalysts under thermal and photo-thermal conditionsKristijan Lorber, Vasyl Shvalya, Janez Zavašnik, Damjan Vengust, Iztok Arčon, Matej Huš, Andraž Pavlišič, Janvit Teržan, Uroš Cvelbar, Blaž Likozar, Petar Djinović, 2024, izvirni znanstveni članek Opis: We analyzed the effect of the calcination atmosphere and visible-light contribution to an accelerated
reaction rate and improved H2 selectivity over 2 wt% Ni/CeO2−x nanorod catalysts. Spectroscopic and
structural characterization was performed by operando DRIFTS, in situ Raman, UV-vis and XAS
techniques, which were complemented by DFT calculations. Calcination in an argon or H2 atmosphere
yields 15% more active catalysts in the thermally driven reaction, which are also more susceptible to
light-induced rate acceleration compared to the catalyst calcined in air. The most active 2Ni/CeO2
catalyst calcined in hydrogen converts methane with a rate of 7.5 mmol (gcat min)−1 and produces a H2/
CO ratio of 0.6 at 460 °C when stimulated by a combination of visible light and thermal energy. In the
absence of visible light illumination and at an identical catalyst temperature, the achieved methane rate
was 4.2 mmol (gcat min)−1 and the H2/CO ratio was 0.49. The non-oxidative calcination improves nickel
dispersion and the formation of subnanometer sized Ni clusters, together with a higher abundance of
surface and bulk oxygen vacancies in ceria nanorods. The Ni–Ov–Ce3+components constitute the
catalytically active sites under visible light illumination, which enable the DRM reaction to proceed with
an Ea value of 20 kJ mol−1. Visible light also induces the following changes in the 2Ni/CeO2−x catalyst
during the DRM reaction: (1) decomposition and desorption of carbonates from the nickel–ceria
interface sites, (2) reduced population of nickel surface with carbonyl species and (3) promoted
adsorption and dissociation of methane. Ključne besede: methane dry reforming performance, calcination Objavljeno v RUNG: 05.07.2024; Ogledov: 757; Prenosov: 16 Celotno besedilo (4,24 MB) Gradivo ima več datotek! Več... |