1. Analysis and synthesis of theoretical and practical implications of case management model and notationMateja Bule, Gregor Polančič, 2025, izvirni znanstveni članek Opis: Case Management Model and Notation (CMMN) is a graphical notation used to model less predictable, highly flexible processes that may behave differently in each instance. It uses an event-centred approach and expands on what can be modelled with procedural modelling notations. Nearly a decade since the occurrence of CMMN, its practical use is questionable. We performed this research to identify possible reasons for this and to classify the potential advantages and disadvantages of CMMN. With the aforementioned objectives, we conducted a systematic literature review, which provided a broad insight into the state of the investigated object along with techniques for analysing qualitative data, coding, and successive approximation. From an initial set of 942 articles, 43 remain relevant. The results of the analysis and synthesis of the obtained data from relevant articles were generalised codes, which were used to explicitly answer the research questions. The results indicate that CMMN has good foundations in the declarative modelling approach and within the Case Management paradigm. Nevertheless, some issues were identified with the notation and elements of CMMN and with its complement—Business Process Model and Notation (BPMN).
Ključne besede: CMMN, case management, BPMN, declarative modelling, flexibility, visual language
Objavljeno v DKUM: 23.04.2025; Ogledov: 0; Prenosov: 0
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2. Assessment of in-plane timber floor stiffness as structural diaphragms: a numerical approach to lateral load responseJelena Vilotijević, Miroslav Premrov, 2024, izvirni znanstveni članek Opis: The behaviour of horizontal floor diaphragms plays a crucial role in ensuring the overall response of a building during earthquakes, as the stiffness of these diaphragms determines whether the structure will act as an integrated system. If the diaphragms do not exhibit sufficient stiffness, differences in the redistribution of forces on wall elements arise, increasing the risk of significant deformations and even local damage, which is commonly observed in earthquake-affected areas. Additionally, flexible diaphragms heighten the risk of torsional effects. Due to these factors, more attention should be given to the response of buildings with flexible diaphragms. Eurocode standard specifies general requirements under which diaphragms should be considered rigid within their plane, depending on the maximum diaphragm moment. However, specific guidelines regarding the geometric and material properties of elements that significantly impact seismic behaviour are not included in the existing European standards. This served as a basis for conducting a numerical study analysing the in-plane behaviour of floor elements made from different materials. This study, limited to a simple box-shaped structure with masonry walls, symmetrical in both orthogonal directions, evaluated and thoroughly analysed the deformations for different types of diaphragms, including prefabricated wooden frame-panel floors, CLT panels, and reinforced concrete slabs. Special emphasis was placed on wooden structural elements due to the increased demand for timber construction, as the behaviour of these elements needs to be properly studied, especially in seismic regions. The study results were obtained through FEM analysis using the SCIA Engineer software, version 22. The modelling of elements was carried out considering the orthotropy of brick wall and wooden ceiling elements, as well as simulating the appropriate shear stiffness of the connecting means.
Ključne besede: horizontal diaphragms, floor flexibility, lateral load resisting system, timber frame-panel floor, cross-laminated timber, concrete slab, seismic design
Objavljeno v DKUM: 10.01.2025; Ogledov: 0; Prenosov: 17
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3. Energy flexibility in aluminium smelting : a long-term feasibility study based on the prospects of electricity load and photovoltaic productionMarko Bizjak, Niko Uremović, Domen Mongus, Primož Sukič, Gorazd Štumberger, Haris Salihagić Hrenko, Dragan Mikša, Stanislav Kores, Niko Lukač, 2024, izvirni znanstveni članek Ključne besede: energy flexibility, aluminium smelting, renewable energy, virtual battery, solar production
Objavljeno v DKUM: 17.12.2024; Ogledov: 0; Prenosov: 16
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4. A Machine Learning Application for the Energy Flexibility Assessment of a Distribution Network for ConsumersJaka Rober, Leon Maruša, Miloš Beković, 2023, izvirni znanstveni članek Ključne besede: flexibility, baseline, demand response, distribution transformer, congestion management, power flow control, peak shaving, load shifting, predictive models, machine learning
Objavljeno v DKUM: 05.01.2024; Ogledov: 386; Prenosov: 58
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5. Investigating the impact of supply chain management practices on customer satisfaction through flexibility and technology adoption : empirical evidenceNourhan Ahmed Saad, Sara El Gazzar, Sonja Mlaker Kač, 2024, izvirni znanstveni članek Opis: The aim of this research is to empirically investigate the influence of supply chain management practices (SCMPs) on customer satisfaction through the mediating rolesof flexibility and technology adoption. A questionnaire was used to collect data from organizational consumers in the Egyptian context, in which hypotheses were analyzed through covariance-based structural equation modeling for 1009 usable questionnaires. The findings revealed the positive relationship between SCMPs and flexibility, technology adoption, and customer satisfaction. Moreover, it revealed the positive relationship between technology adoption and customer satisfaction, however, the direct impact of flexibility on customer satisfaction is not significant. Empirical evidence also illustrated that technology adoption can significantly mediate the relationship between SCMPs and customer satisfaction.
Ključne besede: customer satisfaction, Egypt, flexibility, micro, small and medium-sized enterprises, supply chainmanagement practices, technology adoption
Objavljeno v DKUM: 15.12.2023; Ogledov: 106; Prenosov: 18
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6. Use of active elements for providing suitable voltage profiles and prevent overloads in radial distribution networksMarko Vodenik, Matej Pintarič, Gorazd Štumberger, 2022, izvirni znanstveni članek Opis: The article deals with the issue of providing suitable voltage profiles and preventing congestion of network elements in distribution networks. Active network elements and network users’ energy flexibility services are used to provide a suitable voltage profile and prevent congestion in distribution networks. The discussed active network elements include a transformer with on-load tap changer, reactive power compensation devices, energy storage systems, distributed energy resources, and network users’ energy flexibility services, where the active consumers adjust their consumption, production and storage of energy. Based on the Backward Forward Sweep load flow computation method, the case studies are performed for the discussed low voltage distribution network, where the measurement results were available. The case studies for preventing overload of the distribution transformer are performed using a battery energy storage system and network users’ energy flexibility services. The case studies for providing suitable voltage profiles are performed using all listed active elements and a combination of different active elements. In addition, to provide suitable voltage profiles, the existing conductors are replaced with conductors of a larger cross-section. Technically acceptable solutions that can provide a suitable voltage profile and prevent the overloading of network elements in the most demanding operating conditions are presented in this article.
Ključne besede: voltage profile, radial distribution network, load flow calculations, active network elements, energy flexibility
Objavljeno v DKUM: 30.10.2023; Ogledov: 537; Prenosov: 10
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7. Part-time jobs: opportunity or obstacle? : case of the Moravian-Silesian RegionŠárka Čemerková, Irena Šebestová, Roman Šperka, 2018, pregledni znanstveni članek Opis: Background and Purpose: Part-time employment could be seen as a modern form of employment or a type of innovative organizational change. The average share of part-time jobs in the Czech Republic in the observed period of 2004-2016 was 3.9 % according to the OECD, in comparison to the average OECD value of 16.6%. The main question to arise was, are there any regional differences? The presented conclusions are based on a regional study in the Moravian-Silesian Region (MSR) in the Czech Republic where the median value of part- time jobs is 10%. The main goal is to evaluate the regional level of part-time job offers and identify the main opportunities and obstacles which cause the low number of these job positions.
Design/Methodology/Approach: The paper is based on a quantitative study using a questionnaire-based survey, comprising 215 respondents – owners of small and medium-sized enterprises (SMEs) in the Moravian-Silesian Re- gion in the Czech Republic. The survey consists of 16 questions in three main areas: (i) Entrepreneurial motivation (1 item), (ii) External factors – Labour market problems (4 items), and (iii) Internal factors. Secondary information such as the results of earlier studies and regional government websites were used for data results comparison. All variables are compared in the context of the branch of business, number of employees, turnover, and age. Finally, a factor analysis was used to find the main way how to improve part-time job offers.
Results: The variety of businesses and different regional locations opens up space for discussion regarding part- time job support. A factor analysis found five significant issues, which could affect local labour market and company behaviour.
Conclusion: The added value of the paper can be seen in the factor identification, where internal willingness to sup- port part-time employment and qualification growth as organizational change must be in first place.
Ključne besede: flexibility, Moravian Silesian Region, part-time employment, SME
Objavljeno v DKUM: 10.10.2018; Ogledov: 1079; Prenosov: 157
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8. Flexicurity or flexicarity? : a Portuguese overviewNoemia Bessa Vilela, José Caramelo Gomes, Natacha Silva, 2016, izvirni znanstveni članek Opis: Due to the increasing competition on the labour market, the search for new approaches to labour legislations led to the creation and adoption, in some countries, of so called “flexicurity”. “Flexicurity” became top of the list in the policy agenda in the European Union, but there is doubt that such an agenda for encompassing labour market reform providing not employment. As sources are used “flexicurity” models, in countries where it has already been successfully implemented, as well as Eurostat data, information made available by the European Commission, as well as doctrinal and research papers. Portuguese jurisdiction is considered by national legal doctrine as a closed model. Heavy regulation and constitutional constraints drive an almost unanimous rejection of the possibility to introduce the concept at national level. This article's goal is to discuss the ways the concept could be introduced in the Portuguese jurisdiction. Would the model effectively create security, or would it result in precarity?
Ključne besede: labour, flexicurity, security, flexibility, employment
Objavljeno v DKUM: 02.08.2018; Ogledov: 1199; Prenosov: 71
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9. Multi-objective synthesis of company’s supply-networks based on integration of renewable resourcesAnnamaria Vujanović, 2017, doktorska disertacija Opis: The aim of this doctoral dissertation was to develop a general methodology for sustainable integration of company's supply networks into nearby regional networks by i) integrating renewables, thereby increasing company's energy self-sufficiency, ii) by performing multi-objective synthesis in order to obtain economically efficient and yet environmentally benign or even unburdening solutions, and iii) to perform dynamic and stochastic synthesis under uncertainties in dynamically changing market conditions in order to obtain more reliable and realistic solutions. The research work is directly interlinked with a large-scale European meat producing company Perutnina Ptuj d.d., which is located in the heart of Slovenia.
The aim of the first part was to integrate renewables into companies’ supply-networks at regional level in order to maximize the self-sufficiencies of their energy supplies. This concerns companies’ activities from the use of natural resources to supplying their final products to the customers being interlinked with their regional networks. A Mixed-Integer Linear Programming (MILP) model has been developed for the integration of both the companies’ and surrounding regional supply-networks and the utilization of different types of renewables as sources for the companies’ energy supplies. The potential renewable energy sources, which are located within companies surrounding region are solar, biomass, organic and animal wastes. The result indicates that by sufficient integration of renewables into companies’ supply networks, profitable and yet energy self-sufficient solutions can be obtained.
The second part presents the multi-objective synthesis of a company’s supply-network by integrating renewables and accounting for several environmental footprints. A previously developed model for achieving energy self-sufficiency by integrating renewables into companies’ supply-networks has been extended for the evaluation of environmental impacts, such as energy, carbon, nitrogen, and water footprints. The achievement of an energy self-sufficient supply-network has been considered whilst significantly reducing environmental impacts. Direct (burdening) and indirect (unburdening) effects that form total effects on the environment are considered for the evaluation of environmental footprints. This approach identifies those alternative energy production technologies that are more profitable and environmentally more benign with significant unburdening capabilities. The results showed significant unburdening of the environment in terms of carbon and nitrogen footprints; however, higher burdening in terms of the water footprint.
The third part presents a multi-objective MILP synthesis of a dynamic supply-network under uncertainty applied to the company. The previously-developed multi-objective model for achieving energy self-sufficiency by integrating renewables into companies’ supply-networks has now been extended to account for the dynamic consideration of variable supply and demand over the year, for uncertainties related to products’ demand and sun radiation, and for multi-objective optimisation, in order to obtain the most sustainable company’s supply-network. The sustainable synthesis of a company’s network is performed regarding the integration of the renewables such as biomass and other wastes, and solar energy. The obtained solutions are those reflecting maximal profit, reflecting constantly-changing dynamic market conditions, accounting for several uncertain parameters, and protecting the environment.
Ključne besede: Company's supply network, Renewables, Environmental Impacts, Dynamic synthesis, Flexibility, Multi-objective optimisation, Uncertainty
Objavljeno v DKUM: 21.07.2017; Ogledov: 1694; Prenosov: 176
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10. The role of tipping in reducing labour costs : case of sector retail petroleum productsAndrej Raspor, Gozdana Miglič, Goran Vukovič, Blaž Rodič, 2014, izvirni znanstveni članek Opis: The purpose of this paper was to determine whether tipping could reduce labour costs in the petroleum products retail sector. The research we present was designed on the basis of survey results gathered from Slovenian petrol stations in 2009 and 2010. We have identified the following factors in the tipping process: job satisfaction, flexibility, service quality, satisfaction, motivation and the factor of receiving tips. The analysis showed correlation between methods used to increase the value of tips and better service quality, increased financial and numerical flexibility, motivation, satisfaction upon receipt of tips and the method used to increase the value of tips. In order to decrease labour costs we propose that the management take control of tipping and integrates tips into the reward system. Also, the employees should be made aware about how tipping improves service and increases their income.
Ključne besede: motivation, tipping, flexibility
Objavljeno v DKUM: 06.07.2017; Ogledov: 842; Prenosov: 155
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