Digital repository of Slovenian research organisations

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in

Options:
  Reset


Query: "keywords" (model) .

1 - 10 / 133
First pagePrevious page12345678910Next pageLast page
1.
Psychometric properties of the Slovenian adaptation of Zuckerman-Kuhlman Cross-Cultural 50 item personality questionnaire (ZKPQ-50-CC) in a sample of emerging adults
Timotej Glavač, Žan Lep, Maja Zupančič, 2023, original scientific article

Abstract: The aim of the present study was to validate the Slovenian version of the ZKPQ-50-CC (Aluja et al., 2006). The ZKPQ-50- CC is a shortened, cross-culturally validated version of the Zuckerman Kuhlman Personality Questionnaire (ZKPQ; Zuckerman et al., 1988), based on an alternative five-factor model of personality. Our sample included 2138 emerging adults (1534 females; Mage = 21.28 years; SD = 3.62) who filled in both the ZKPQ-50-CC and the Big Five Inventory (BFI; John et al., 1991). The results of a confirmatory factor analysis showed similarities to those of the original validation study across four European countries (Aluja et al., 2006). To improve upon the psychometric properties of the ZKPQ-50-CC scales, however, we removed six items with low factor loadings (below .30), resulting in the ZKPQ-44-CC. The five factors (Impulsive Sensation Seeking, Neuroticism-Anxiety, Aggression-Hostility, Activity, and Sociability) of the adjusted instrument suggested acceptable internal reliability, as well as satisfactory convergent and divergent validity against the BFI factors. We also determined relatively high levels of temporal stability (measurements two years apart) of the alternative five factors in a smaller follow-up sample (n = 168). Despite several drawbacks, we consider the ZKPQ-44-CC appropriate for psychological research in Slovenia.
Keywords: Zuckerman’s alternative five-factor personality model, the ZKPQ-50-CC, Slovenian validation, validity, internal reliability, temporal stability, Zuckerman-Kuhlman Cross-Cultural 50 item personality questionnaire ZKPQ-50-CC, test validity, psychometrics, test reliability
Published in DiRROS: 08.07.2025; Views: 37; Downloads: 9
.pdf Full text (503,31 KB)
This document has many files! More...

2.
Intergenerational model of financial satisfaction and parent-child financial relationship
Maja Zupančič, Mojca Poredoš, Žan Lep, 2023, original scientific article

Abstract: The study examined an intergenerational model offinancial socialization and its outcomesthat connects parents’and their children’s self-perceivedfinancial learning outcomes tosatisfaction withfinancial management and parent-childfinancial relationships. Theconceptual model was based on models offinancial socialization processes contributing tohealthyfinancial development of emerging adult students (Shim et al., 2010; Sirsch et al.,2020), but extended the links across two generations within the same family. Consideringperspectives of both generations in a single model, it was tested in a sample of 482 pairs ofSlovenianfirst-year university students and one of their parents. Structural equationmodeling revealed that parental healthyfinancial learning outcomes (knowledge, be-havioral control, behavior) shaped their children’s positivefinancial development (fi-nancial learning outcomes and satisfaction) and promoted the parents’satisfaction withfinancial management. In turn, both the students’and the parents’financial managementsatisfaction positively predicted a joint measure of satisfaction with parent-childfinancialrelationship. Similar links offinancial learning outcomes to satisfaction withfinancialmanagement and parent-childfinancial relationships were observed for both generations,even though parents and their children werefinancially socialized under different so-cioeconomic conditions.
Keywords: financial relationship, parent-child, financial satisfaction, intergenerational model, financial socialization, financial management
Published in DiRROS: 08.07.2025; Views: 35; Downloads: 10
.pdf Full text (866,80 KB)
This document has many files! More...

3.
The relative effect of job demands, resources, and personal resources on teaching quality and students' engagement during the COVID-19 pandemic
Žan Lep, Eva Klemenčič Mirazchiyski, Plamen Mirazchiyski, 2023, original scientific article

Abstract: During the COVID-19 pandemic's school closures and the distance education that resulted from it, teachers were faced with an increasing workload and significant changes in their working environment. Because increased workload can result not only in worsened mental health and lower work motivation, but also in worsened learning outcomes, this article explores how teacher-perceived job demands, job resources, and personal resources are related to teachers' assessment of teaching quality and student engagement during the pandemic. Using the data of 1,422 8th grade teachers in Slovenia from the IEA Responses to Educational Disruptions Survey (REDS) survey, this study also explores the perceived level of support from different institutional actors and the utility of Job demands-resources model for this specific group of workers in a specific work setting. The results show that the teachers of 8th graders in Slovenia perceived a higher level of support from their closest working environment compared to the national bureaucracy. In terms of job demands, the increased workload in preparing the lessons had negative effect on both teaching quality and student engagement, while the reported increase in time spent on direct work with students and social support received (a job resource) contributed positively to both outcome variables. In line with theoretical expectations, personal resources were positive predictors of teaching quality and student engagement in our model. Compared with the initial expectations this study had based on the underlying theoretical model, the results paint a complex relationship between job characteristics and learning outcomes during distance learning. Thus, some of the challenges both teachers and policy-makers face and will continue to face in possible similar situations are discussed.
Keywords: job demands, job resources, teachers, teaching quality, student engagement, job demandsrResources model, covid-19
Published in DiRROS: 08.07.2025; Views: 29; Downloads: 11
.pdf Full text (856,56 KB)
This document has many files! More...

4.
Go with the flow : a case study of migratory beekeeping and its associated costs
Anja Pavlin, Andraž Marinč, Janez Prešern, 2025, original scientific article

Keywords: honey, colonies, migration, model, CO2
Published in DiRROS: 27.06.2025; Views: 122; Downloads: 42
.pdf Full text (1,25 MB)

5.
Spatially explicit individual-based model reveals the mauve stinger jellyfish distribution in the Mediterranean Sea
Martin Vodopivec, Alenka Malej, 2025, original scientific article

Abstract: The mauve stinger Pelagia noctiluca is a holoplanktonic oceanic jellyfish known for its painful sting and large outbreaks at irregular intervals. As jellyfish field observations are almost exclusively limited to coastal regions, there are many unknowns about the spatial and temporal dynamics of most species. We approach the problem using a spatially explicit individual-based model for the mauve stinger in the Mediterranean Sea. The newly developed module for the OpenDrift Lagrangian particle tracking tool includes diel vertical migrations, fooddependent growth modeled on Michaelis–Menten kinetics, and custom mortality related to shallow waters and stranding. In the first part of the study, we analyze the resulting parameter space searching for solutions that ensure a stable Pelagia noctilucapopulation in the western Mediterranean Sea. In the second part, we conducted several 21-year simulations. Despite its relative simplicity, the model reveals for the first time the dynamic spatio-temporal distribution of Pelagia noctiluca. We demonstrate how spatially explicit individual-based model can be used to generate a realistic spatio-temporal distribution of marine zooplankton, even with a limited set of observations and loosely constrained parameters. The model code is easy to modify and freely available.
Keywords: individual-based model, agent-based model, zooplankton, Lagrangian particle tracking, ocean circulation, jellyfish
Published in DiRROS: 05.06.2025; Views: 226; Downloads: 122
.pdf Full text (5,98 MB)
This document has many files! More...

6.
Age-dependent moisture response of conifers near their cold range limit
Jan Tumajer, Grudd Håkan, Jernej Jevšenak, Andreas J. Kirchhefer, Francesco Marotta, Jiří Mašek, Kiara Maria Nowatzki, Nikolaus Obojes, Markus Stoffel, V. Treml, Jelena Lange, 2025, original scientific article

Abstract: Growth dynamics of cold subarctic and subalpine forests are primarily sensitive to temperature, but growth responses may vary across regions or shift over tree ontogeny. Systematic assessments of spatial, interspecific, and demographic variation in temperature and moisture limitation of tree growth at cold distribution margins are essential for enhancing our understanding of how these ecosystems will evolve under climate regimes. To address this gap, we built a network of 22 tree-ring width chronologies from cold forests covering two regions (Fennoscandia, European Alps), three species (Pinus sylvestris, Pinus cembra, Larix decidua), and two age cohorts (45–100 and >150 years). We combined daily climate-growth correlations with the process-based Vaganov-Shashkin growth model to identify differences in critical growth factors between species and age cohorts. In addition, we assessed the coincidence of unusually wide and narrow tree rings with years of specific climatic anomalies. Although growing season temperature was the dominant growth-limiting factor, seasonal effects of water balance on tree growth were considerably large and varied systematically between regions, species, and particularly age cohorts. The growth of young P. sylvestris in Fennoscandia responded negatively to water balance and narrow rings coincided with wet years. In contrast, the growth of young P. cembra in the Alps was drought-limited. Old trees of all species and both age cohorts of L. decidua in the Alps showed limited sensitivity to water balance. The patterns of climate-growth responses in cohort chronologies based on tree age at the year of coring were similar to ontogenetic shifts of climate-growth responses if chronologies were based on the cambial age of individual rings. Our results stress the need to account for interspecific and demographic differences in sensitivity to climate in large-scale studies of cold forest ecosystems.
Keywords: boreal forest, Larix, subalpine forest, pinus, tree ring, Vaganov-Shashkin model
Published in DiRROS: 04.06.2025; Views: 198; Downloads: 86
.pdf Full text (10,22 MB)
This document has many files! More...

7.
A simple multiple flow regime modeling approach of induced flow in external loop airlift reactors
Bor Zupan, Matjaž Perpar, Jurij Gregorc, Božidar Šarler, 2025, original scientific article

Abstract: Accurate treatment of heat and mass transfer processes inside airlift reactors requires accurate velocity field information. This study presents a novel one-dimensional model forecasting induced liquid flow within an external loop airlift reactor across diverse flow regimes. The approach is grounded on homogeneous flow assumption, augmented by a novel correction term derived through modeling of turbulence-induced pressure losses behind gas structures, employing the separated flow model (Lockhart-Martinelli). The model was assessed by comparing the results with purpose-provided experimental data utilizing air and demineralized water. The gas and liquid superficial velocities ranged from 0.001-0.6 m/s and 0.2–1.1 m/s, respectively. Within ± 10 %, an agreement between the novel model and experimental data was observed for both bubbly, separated, and in- termediate flow regimes. A similarly robust agreement was confirmed through comparisons with five published experimental datasets. The distinctive feature of this model is its ability to accommodate multiple flow regimes in a unified manner. It circumvents the necessity for specific regime modeling by introducing a correction term with a complexity marginally surpassing that of the conventional homogeneous flow approach. Beyond its primary application in airlift reactors, the model provides a unified framework for modeling two-phase flow hydrody- namics in thermal applications, particularly in flow boiling and bubble-induced convective heat transfer systems. The model’s simple yet effective structure also allows for integration into higher-fidelity heat transfer simula- tions, making it valuable for boiling heat transfer studies, enhanced cooling strategies, and industrial multiphase flow applications.
Keywords: airlift reactor, homogeneous flow, separated flow, theoretical model, induced flow
Published in DiRROS: 13.05.2025; Views: 229; Downloads: 89
.pdf Full text (4,69 MB)
This document has many files! More...

8.
9.
10.
Considering the concept of synergism in corrosion inhibition
Anton Kokalj, 2023, original scientific article

Abstract: Synergism in corrosion inhibition and how to best quantify it is explored conceptually. In the equation for the synergistic parameter, the mixture’s inhibition efficiency is evaluated against a threshold inhibition efficiency based on the performance of pure compounds. However, the choice for the threshold value is not unique. In the literature, the threshold of Aramaki–Hackerman is usually used. Herein, several other reasonable choices are developed, which are based on (i) the Langmuir adsorption model, (ii) the requirement that a mixture’s inhibition efficiency is higher than the highest inhibition efficiency of pure compounds, or (iii) that corrosion resistance in a mixture is higher than the sum of resistances in pure compounds. The presented synergistic models are also extended to multi-component mixtures.
Keywords: corrosion inhibition, synergism, Langmuir adsorption model
Published in DiRROS: 23.04.2025; Views: 243; Downloads: 62
.pdf Full text (1,65 MB)

Search done in 0.21 sec.
Back to top