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1.
An innovative approach to organizational changes for sustainable processes : a case study on waste minimization
Eva Krhač Andrašec, Tomaž Kern, Benjamin Urh, 2023, izvirni znanstveni članek

Opis: It is necessary to adapt constantly to the business environment with its changing demands. Understanding the objectives, scope, and limitations of actual process changes is crucial, and can be achieved with numerous measures, methods, and techniques. This research demonstrates an innovative approach to organizational changes to enable sustainable processes. In the first part of this research, relevant measures, methods, and techniques are selected through an in-depth literature review. Then, an international online questionnaire is executed among 213 enterprises from four countries. In the last part of this research, the developed approach is tested for the example of waste minimization in the process of developing coatings. Based on the analysis of the survey questionnaire, the usability and benefits of various measures are demonstrated, namely from the point of view of their positive impact on structural and operational efficiency indicators. At the end of the article, a case study presents the success of the innovative approach in terms of 88% waste minimization and up to 48% time and cost reductions in the process of developing coatings. The proposed approach enables better choices to be made and the more efficient use of various measures, which can lead to more sustainable processes and improve the efficiency of enterprises.
Ključne besede: organizational changes, key performance indicators, measures, methods and techniques, sustainable processes, waste minimization
Objavljeno v DKUM: 02.04.2024; Ogledov: 219; Prenosov: 14
.pdf Celotno besedilo (2,34 MB)
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2.
Sustainable processing of materials using supercritical fluids : doktorska disertacija
Dragana Borjan, 2022, doktorska disertacija

Opis: Supercritical fluids (SCFs) are powerful solvents with many unique properties. They have great potential for many processes, from extraction to chemical reactions and recycling. Accordingly, phase equilibrium data and thermodynamic and transport properties measurements in systems with a supercritical phase, as well as reliable and versatile mathematical models of the phase equilibrium thermodynamics, are needed for the process design and economic feasibility studies. The dissertation focuses on the benefits of supercritical fluid technology and consists of three main sections. The first section includes studies of the phase equilibria of the binary gas-alcohol and gas-urea derivatives. The influence of pressure and temperature on the system behaviour (solubility, viscosity, density, interfacial tension, melting point curve) was investigated. Most of the experiments were carried out with a high-pressure optical view cell, with minor modifications of the apparatus and measurement principle to determine mentioned thermodynamic and transport properties. The second part of the dissertation deals with the recovery of extracts from natural materials. Special interest is oriented towards supercritical fluid extracts, characterised by strong biological activities, especially antimicrobial and antioxidant properties. Supercritical fluid extraction has been performed on a semi-continuous apparatus (at pressures of 150 bar and 250 bar and temperatures of 313.15 K and 333.15 K for oregano extraction; and at pressures of 100 bar and 300 bar and temperatures of 313.15 K and 333.15 K for red beetroot extraction) and various methods such as the microdilution method and the DPPH method were used to determine antimicrobial and antioxidant activity. In the third part, an overview of different methods for recycling carbon fibre reinforced composites is given, including chemical recycling with supercritical fluids. This field has not been well explored, and the approach is relatively new but very interesting from a sustainable point of view. For an economically feasible process design, the thermodynamic and mass transfer data have to be determined. The principles of the future lab- and pilot-scale operations demand these supporting data be known. The results obtained in the frame of this study represent the high added value in the scientific field. They are essential to design and modify processes that yield products that cannot be achieved with conventional production processes.
Ključne besede: supercritical fluids, alcohols, urea, phase equilibria, viscosity, density, interfacial tension, modified capillary method, isolation methods, supercritical fluid extraction, pharmacological activity, carbon fiber reinforced composites, recycling techniques
Objavljeno v DKUM: 11.10.2022; Ogledov: 922; Prenosov: 133
.pdf Celotno besedilo (4,64 MB)

3.
Teaching Methods for Economics and Business Sciences : Proceedings of the 3rd International Scientific Conference
2020

Opis: The author of the first paper explores how students perceive various types of active learning techniques. The second paper identifies the teaching methods that are accepted by Generation Y students. The author of the third paper addresses the characteristics of contemporary students and their implications for teaching strategies. The fourth paper explores the effects of interdisciplinary problem-based learning on the development of students' knowledge, skills, and competences. Gamification as a teaching strategy is discussed in the fifth paper. The sixth paper addresses the challenge of merging disciplines of entrepreneurship and finance in one study program. The approaches to increasing students’ focus in learning finance-related subjects are discussed in the seventh paper. In the eighth paper authors expose the value of practical higher education as a response to the perceived phenomena of financial illiteracy and financial exclusion. The role of research results transfer into university teaching of transport economics discusses the author of the ninth paper. The authors of tenth paper explore the relevance of mastering Spanish for students of economics and business disciplines. The last paper discusses the authors' experiences with e-learning in higher education from the perspective of its extent and importance.
Ključne besede: higher education, economics, business sciences, teaching methods, teaching strategies, active learning techniques, Generation Y, problem-based learning, practical higher education, e-learning
Objavljeno v DKUM: 02.06.2020; Ogledov: 1367; Prenosov: 47
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