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Some aspects of fabric drape
Darja Žunič-Lojen, Simona Jevšnik, 2007, izvirni znanstveni članek

Opis: Drape is one of the important factors influencing the aesthetics and functionality of fabrics. Therefore, investigation into drape parameters is important for analysing its behaviour. Drape parameters were investigated from different aspects using the Cusick Drape meter and Image Analyser. Firstly, the influence of time on the drape coefficient and number of folds was studied over 24 hours. Usually, drape is considered as a static, time-independent problem. However, this investigation shows that the drape coefficient of a fabric changes si-gnificantly over a longer time period. Furthermore, the comparison of drape parameters is shown using samples with two different diameters. The larger samples have smaller drape coefficient than those with smaller diameters, and their drape is less changeable over time. Basically, the three-dimensional fabric drape is not an independent fabric property, there-fore, the connection between bending rigidity and drapecoefficient was studied. The last aspect of this investigation was the repeatability of drape measurements, and the establish-ment of the required number of measurements for drape coefficient and fold numbers.
Ključne besede: fabric drape, drape parameters, time-dependence, bending rigidity, measurement repeatibility
Objavljeno: 31.05.2012; Ogledov: 981; Prenosov: 29
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Influence of temperature on the surface enhanced Raman scattering spectra of 2, 4, 6 - trinitrotoluene
Simon Hamler, 2015, magistrsko delo

Opis: The detection of trace amounts of explosive like trinitrotoluene (TNT) is an important issue in the prevention of terrorist attacks. Surface enhanced Raman scattering (SERS) spectroscopy has become a powerful detection technique for identification of minute amounts of analytes. This thesis presents data of TNT in solution, deposited on a nanostructured gold surface, which is heated up to 60 °C. The observed changes in the microscopy images and in the SERS spectra are explained by evaporation, phase transition and decomposition of the TNT molecules. The impact of temperature dependence of SERS effect is studied on a chemisorbed 4-Nitrothiophenol monolayer. To minimize the evaporation of TNT molecules, a self-assembled monolayer of mercaptohexanol (MCH) was inserted between plasmonic surface and TNT.
Ključne besede: surface enhanced Raman spectroscopy, explosives, temperature dependence, microscopy, evaporation, phase transition, decomposition
Objavljeno: 05.11.2015; Ogledov: 855; Prenosov: 48
.pdf Celotno besedilo (2,25 MB)

Dependence between Croatian and European stock markets
Silvo Dajčman, 2013, izvirni znanstveni članek

Opis: The objective of this paper is to analyze dependence structure between the returns of Croatian and five European stock markets (Austrian, French, German, Italian, and the U.K.ʼs). We propose a copula GARCH approach, where the return series are modeled as univariate GARCH processes and the dependence structure between the return series is defined by a copula function. Four different copulas are fitted - a constant and conditional normal and symmetric Joe-Clayton (SJC) copulas - and estimated by a semi-parametric method. We found that the time-varying normal copula yields the best fit for CROBEX-CAC40, CROBEX-DAX, and CROBEX-FTSE-MIB stock indices pairs, while the time-varying SJC copula is the best fit for CROBEX-ATX and CROBEX-FTSE100. Further, we found that the probability of simultaneous extreme positive and negative returns in Croatian and other European stock markets can increase to 0.77 during turbulent times. The lower and upper tail dependence dynamics between Croatian and other European stock markets is similar in pattern, differing only in scale. The basic conclusion of the research is that the dependence between the stock markets of Croatia and five major European stock markets is dynamic and can be properly captured by either a dynamic normal or symmetrized Joe-Clayton copula GARCH models.
Ključne besede: stock market, stock companies, econometric models, Croatia, EU, dependence, copula GARCH
Objavljeno: 17.07.2017; Ogledov: 263; Prenosov: 67
.pdf Celotno besedilo (1,58 MB)
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Considering interactions among multiple criteria for the server selection
Vesna Čančer, 2010, izvirni znanstveni članek

Opis: Decision-making about server selection is one of the multi-criteria decision-making (MCDM) processes where interactions among criteria should be considered. The paper introduces and develops some solutions for considering interactions among criteria in the MCDM problems. In the frame procedure for MCDM by using the group of methods, based on assigning weights, special attention is given to the synthesis of the local alternatives' values into the aggregate values where the mutual preferential independence between two criteria is not assumed. Firstly, we delineate how to complete the additive model into the multiplicative one with synergic and redundancy elements in the case that criteria are structured in one level and in two levels. Furthermore, we adapted the concept of the fuzzy Choquet integral to the multi-attribute value theory. Studying and comparing the results of the example case of the server selection obtained by both aggregation approaches, the paper highlights the advantages of the first one since it does not require from decision makers to determine the weights of all possible combinations of the criteria and it enables the further use of the most preferred MCDM methods.
Ključne besede: interaction, multi-criteria decision-making, preferential dependence, server
Objavljeno: 03.08.2017; Ogledov: 268; Prenosov: 49
.pdf Celotno besedilo (1,00 MB)
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VAT gap dependence and fiscal administration measures
Tomaž Lešnik, Timotej Jagrič, Vita Jagrič, 2018, izvirni znanstveni članek

Opis: The paper examines the VAT gap estimated on the basis of VAT tax returns. The assessment of tax gap dependence is examined based on macroeconomic influences and the measures of the Slovenian fiscal administration. Regarding the latter, the number of audits being performed and the effects of audit activity (tax yield) have been considered. The results of the analysis support the thesis that the tax gap is reduced in conditions of economic growth. The fiscal administration measures showed the desired effect. An important factor lowering the gap was proven to be the number of (VAT) audits. A similar impact on the tax gap, although considerably smaller, was found to have effects of an audit. Audit planning might be considered as guidance for fiscal policies to lower the tax gap.
Ključne besede: tax gap, VAT, tax gap dependence
Objavljeno: 10.10.2018; Ogledov: 363; Prenosov: 169
.pdf Celotno besedilo (285,40 KB)
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