Iskanje po katalogu digitalne knjižnice

Opis: This master’s thesis explores the expanding discrepancy and subsequent outcomes between prevailing pedagogical approaches and the realities of conventional assessment practices, where a fundamental understanding of a syntactic organisation is a prerequisite for engagement. Thus, the thesis aims to examine Slovene EFL primary school students’ familiarity with the English sentence structure and its elements guided by the assumptions addressing the syntactic influence of students’ L1, their limited syntactic competence, and their explicit awareness of English sentence structure and its constituent parts. Adopting a mixed methods research design and grounded in a comprehensive theoretical framework, the empirical study involved of 75 participants aged between 11 and 14 years (±1 year), which were in turn tasked with completing a grammar awareness task, language function task, word order task, and a sentence structure in translation task. The findings ultimately indicate students’ shortcomings in the identification of core sentence elements, the emergence of explicit syntactic knowledge, and a salient reliance on Slovene syntactic frameworks.
Ključne besede: English as a Foreign Language, metalinguistic awareness, cross-linguistic influence, syntactic competence, English sentence structure
Objavljeno v DKUM: 18.09.2025; Ogledov: 0; Prenosov: 7
Celotno besedilo (5,12 MB)

Opis: In this paper, we examine roots of graph polynomials where those roots can be considered as structural graph measures. More precisely, we prove analytical results for the roots of certain modified graph polynomials and also discuss numerical results. As polynomials, we use, e.g., the Hosoya, the Schultz, and the Gutman polynomial which belong to an interesting family of degree-distance-based graph polynomials; they constitute so-called counting polynomials with non-negative integers as coefficients and the roots of their modified versions have been used to characterize the topology of graphs. Our results can be applied for the quantitative characterization of graphs. Besides analytical results on bounds and convergence, we also investigate other properties of those measures such as their degeneracy which is an undesired aspect of graph measures. It turns out that the measures representing roots of graph polynomials possess high discrimination power on exhaustively generated trees, which outperforms standard versions of these indices. Furthermore, a new measure is introduced that allows us to compare different topological indices in terms of structure sensitivity and abruptness.
Ključne besede: graph theory, Hosoya polynomial, Schultz polynomial, Gutman polynomial, root-index, discrimination power, structure sensitivity
Objavljeno v DKUM: 03.07.2025; Ogledov: 0; Prenosov: 5
Celotno besedilo (1,29 MB)
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Opis: 1,6-hexanediol diacrylate (HDDA) or divinyl adipate (DVA) and pentaerythritol tetrakis(3- mercaptopropionate) (TT) were polymerised via a thiol-ene radical initiated photopolymerisation using emulsions with a high volume fraction of internal droplet phase and monomers in the continuous phase as precursors. The porous structure derived from the high internal phase emulsions (HIPEs) followed the precursor emulsion setup resulting in an open porous cellularly structured polymer. Changing the emulsion composition and polymerisation conditions influenced the resulting morphological structure significantly. The investigated factors influencing the polymer monolith morphology were the emulsion phase ratio and surfactant concentration, leading to either interconnected cellular type morphology, bicontinuous porous morphology or a hollow sphere inverted structure of the polymerised monoliths. The samples with interconnected cellular morphology had pore diameters between 4 µm and 10 µm with approx. 1 µm sized interconnecting channels while samples with bicontinuous morphology featured approx. 5 µm wide pores between the polymer domains. The appropriate choice of emulsion composition enabled the preparation of highly porous poly(thiol-enes) with either polyHIPE or bicontinuous morphology. The porosities of the prepared samples followed the emulsion droplet phase share and could reach up to 88%.
Ključne besede: high internal phase emulsions, thiol-ene polymerisation, polyHIPE, bicontinuous structure, phase inversion, poly(thiol-enes)
Objavljeno v DKUM: 13.05.2025; Ogledov: 0; Prenosov: 10
Celotno besedilo (5,24 MB)
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Opis: This paper proposes an on-line method for foreign object detection in a double DD coil system. The foreign object is detected by real-time measurement of the mutual inductance between the transfer pads. Measurement of the mutual inductance between coils can be performed at the start, during initialisation, or during the wireless power transfer. The coils in the double DD coil structure can be used separately; one coil can be used for power transfer and the other can be used for the mutual inductance measurement. The mutual inductance measurement is based on the voltage measurement across the open circuit receiver coil. The measured value of mutual inductance between the transmitter and the receiver pad can be used in a control algorithm and in a foreign object detection algorithm. Additionally, a 2DDq coil structure can be used as a replacement for the double DD coil structure, which increases the power transfer density. The DD coils in the double DD coil structure can also be driven using two phase-shifted voltages, which enables better location and detection of foreign objects. The method also helps to differentiate the mutual inductance change due to the distance change from the mutual inductance change due to the presence of a foreign object.
Ključne besede: WPT, double DD coil structure, mutual inductance measurement, coupling coefficient measurement, FOD, on-line measurement
Objavljeno v DKUM: 01.04.2025; Ogledov: 0; Prenosov: 7
Celotno besedilo (6,66 MB)
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Opis: 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.
Ključne besede: compound textile material, auxetic structure, open area, filtration, mechanical properties, Poisson’s ratio
Objavljeno v DKUM: 25.03.2025; Ogledov: 0; Prenosov: 11
Celotno besedilo (2,67 MB)
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