Search the digital library catalog

Abstract: Namen diplomskega dela je bil sintetizirati poli(metil metakrilat-ko-etilen glikol dimetakrilat) monolite, krajše poli(MMA-ko-EGDMA), s polimerizacijo emulzij z različnim deležem notranje faze (0–95 vol%). Delež notranje faze se je izkazal kot ključen parameter za nastanek por in morfologijo končnega polimera. Pri nizkih deležih so nastali kompaktni monoliti, pri srednjih deležih se je razvila celična struktura z redkimi povezovalnimi porami, pri visokih deležih pa odprta makroporozna mreža. S pomočjo FT-IR spektroskopije in elementne analize smo potrdili uspešno vključitev monomerov MMA in EGDMA v polimerno mrežo. S SEM analizo smo potrdili prehod od kompaktne do spužvaste strukture, pri čemer se je v območju med 60 in 95 vol% notranje faze pokazalo izrazito povečevanje primarnih por ter postopno nastajanje in širjenje povezovalnih por, ob sočasnem tanjšanju sten porozne mreže. Meritve so potrdile, da povprečni premeri por in povezovalnih por naraščajo s povečevanjem deleža notranje faze. Premeri primarnih por so se v analiziranih vzorcih gibali od najmanjših 2,6 μm pri vzorcu PL-02 do največjih 44,2 μm pri PL-13, kar kaže na izrazito povečanje velikosti por. Povezovalne pore so bile zaznane šele od vzorca PL-08 dalje, pri čemer so se njihove vrednosti gibale od 0,7 μm (PL-08 in PL-10) do 10,3 μm (PL-13). Pri PL-09 so bile primarne pore enotne (≈5,5 μm), povezovalne pa majhne (1,2–1,8 μm). Tako primarne kot povezovalne pore so torej dosegle največje dimenzije v vzorcu PL-13 (95 vol% notranje faze). Specifična površina, določena z BET metodo, je prav tako naraščala z večanjem poroznosti in dosegla največjo vrednost 5,42 m²/g pri 80 vol% notranje faze. Rezultati tako jasno potrjujejo povezavo med deležem notranje faze, morfologijo in specifično površino polimernih materialov.
Keywords: HIPE, poliHIPE, poli(MMA-ko-EGDMA), delež notranje faze, poroznost, FT-IR spektroskopija, SEM, BET analiza.
Published in DKUM: 07.10.2025; Views: 0; Downloads: 4
Full text (4,36 MB)

Abstract: Background/Purpose: Companies are becoming aware of the fact that corporate social responsibility (CSR) is becoming the imperative of their sustainable business model despite the potential costs it could generate. Researchers are mostly focused on estimating the relationship between CSR and financial performance where most of the findings indicate their positive relationship. This paper expands existing research and focuses on the relationship between CSR and the risk of bankruptcy using the data from 102 midsize and large companies from non-financial sectors using the data for four years. Research expands existing studies on the EU level according to the fact that most of the existing studies are performed among US companies. Method: Descriptive statistics and SEM-PLS methodology was used to compare and analyze financial data with data collected from 7 groups of stakeholders. Results: Research results indicate that the relation between CSR and the risk of bankruptcy is negative. Conclusion: Becoming a socially responsible company is in the best interest of all stakeholders because CSR activities contribute to financial stability and maintenance of going concern assumption.
Keywords: corporate social responsibility, bankruptcy prediction, Altman Z’ score, SEM-PLS methodology
Published in DKUM: 26.09.2025; Views: 0; Downloads: 2
Full text (713,38 KB)
This document has many files! More...

Abstract: Document Management Systems (DMS) are essential tools for managing organisational information throughout its lifecycle. Despite increasing adoption, many DMS implementations fail to deliver the expected value due to inadequate attention to Critical Success Factors (CSFs). This monograph investigates the impact of selected CSFs—such as top management support, process orientation, and organisational culture—on different phases of the DMS lifecycle: selection, implementation, and usage. Drawing on the ITIL framework and lifecycle-based thinking, the study employs a quantitative methodology using PLS-SEM on data collected from Slovenian organisations. The results show that CSFs vary in importance across lifecycle stages, highlighting the need for dynamic, phase-specific implementation strategies. The findings contribute to theory by integrating CSFs with DMS lifecycle management and provide actionable insights for practitioners seeking to optimise DMS adoption and performance.
Keywords: document management systems (DMS), critical success factors (CSFs), information systems lifecycle, ITIL, system implementation, PLS-SEM, organisational change
Published in DKUM: 29.08.2025; Views: 0; Downloads: 7
Full text (444,58 KB)
This document has many files! More...

Abstract: Background/purpose: This study examines the relationship between students’ cybersecurity vulnerability behavior and e-learning obstacles. With the rapid growth of online education, ensuring the security and privacy of digital platforms has become crucial. In this background, the current study is a first-of-its-kind attempt to understand the relationship between these two variables in the background of higher educational institutions in Iraq. Methods: For this study, the researchers collected data during 2023 from students aged between 19 and 25 enrolled in the University of Karbala, Iraq, using a semi-structured research questionnaire, who were selected through a random sampling method. The questionnaire comprised questions pertaining to the dimensions of both the dependent and the independent variable. A total of 350 valid responses were considered for the analysis in which PLS-SEM was conducted. Results: The outcomes revealed that the professional and human obstacles have a high association with cybersecurity vulnerability behavior. The study also found that the overall obstacles have a significant effect on the cybersecurity vulnerability behavior. All hypotheses were verified and the outcomes confirm that there is an effective relationship between cybersecurity vulnerability behavior and e-learning obstacles Conclusion: Based on the study outcomes, the authors proposed a few recommendations for all the stakeholders of the e-learning process, such as ducational institutions, governments, faculty members, students, and their parents. Though the current study has been confined to a single university in Iraq, future researchers can focus on expanding the study to other higher educational institutions so that a nationwide policy-level initiative can be brought based on the research evidence.
Keywords: cybersecurity vulnerability behavior, e-learning obstacles, higher education, PLS-SEM, student motivation, learning behaviour
Published in DKUM: 06.08.2025; Views: 0; Downloads: 2
Full text (2,90 MB)
This document has many files! More...

Abstract: Particulate matter (PM10 and PM2.5) is a key contributor to urban air pollution and poses significant health risks, particularly in densely populated areas. While conventional air quality monitoring focuses on particle size and concentration, this study emphasizes the importance of understanding chemical composition and emission sources for effective air pollution management. PM samples were collected between 2019 and 2022 at two locations in the Republic of Slovenia: a traffic-dominated urban site and an industrial area. Annual average PM10 concentrations ranged from 14 to 34 μg/m3, and those of PM2.5 ranged from 9 to 22 μg/m3. In addition to decreasing annual concentrations, a notable reduction in exceedance days was observed between 2019 and 2022, indicating the effectiveness of recent air quality improvement measures. Meteorological data and statistical models were used to assess environmental influences on PM variability. Advanced SEM-EDS analysis revealed substantial seasonal and spatial differences in particle composition, with key elements such as silicon (4.3–28.4%), carbon (13.1–61.7%), and trace amounts of lead and zinc varying across sites and particle types. Mineral dust (Si, Al, Ca, Fe, Mg), originating from soil resuspension, construction, and Saharan dust, was dominant. Combustion-related particles containing C, Pb, Zn, and Fe oxides were associated with vehicle emissions, industrial processes, and biomass burning. Secondary aerosols, such as sulphates and nitrates, showed seasonal trends, with higher concentrations in summer and winter, respectively. The results confirm that PM levels are driven by complex interactions between local emissions, weather conditions, and seasonal dynamics. The study supports targeted policy measures, particularly regarding residential heating and traffic emissions, to improve air quality.
Keywords: air pollution, air quality, PM particles, SEM-EDS, Slovenia
Published in DKUM: 30.05.2025; Views: 0; Downloads: 5
Full text (4,02 MB)