1. Public handling of protective masks from use to disposal and recycling options to new productsKatarina Remic, Alen Erjavec, Julija Volmajer Valh, Sonja Šterman, 2022, izvirni znanstveni članek Opis: A study was conducted on the waste of disposable surgical masks and their problematic impact on the environment. The studies examined have shown the negative effects on the environment that are likely to occur and those that have already occurred. In this article, society's relationship to the potential recycling of disposable surgical masks is considered and projected onto the possibilities of the cradle-to-cradle design approach. The development of a product from recycled surgical masks is driven by two different surveys. The first focuses on wear and disposal habits, and the second on the relationship to recycling. As a result, the flooring was developed with thermally treated recycled surgical masks replacing the filler layer. The goal of the product design was to improve the long-term life cycle analysis of a waste surgical mask.
Ključne besede: maske, medicinski odpadki, okolje, recikliranje izdelka z dodano vrednostjo, analiza življenjskega cikla, masks, medical waste, recycling added-value product, life-cycle-analysis
Objavljeno v DKUM: 26.03.2025; Ogledov: 0; Prenosov: 1
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2. Developing a framework for closed-loop supply chain and its impact on sustainability in the petrochemicals industryLobna Tag el Sheikh, Rebeka Kovačič Lukman, 2022, izvirni znanstveni članek Opis: Companies rely on formulating, implementing, and monitoring strategies in social, environmental and economic aspects to ensure that they achieve their goals and keep abreast of developments related to sustainability requirements. Therefore, our study develops a system to integrate the closed-loop supply chain approach in the petrochemical sector. The research follows the quantitative-based approach by collecting data through a questionnaire directed to employees in the supply chain departments, including 230 questionnaires that were collected. Correlation and structural equation models (SEM) were used. This technique consists of multiple regression analysis and factor analysis and analyses the structural relationship between the underlying structures and the measured variables. The results indicated a significant relationship between the supply chains that have a loop from the following perspectives: economic motivations, customer awareness, environmental legislation, and sustainability. By increasing financial reasons, customer awareness and environmental legislation, sustainability will increase as they all move in the same direction. Therefore, the overall effect of a closed-loop supply chain is positive and significant.
Ključne besede: closed-loop supply chain, petrochemicals, cost effectivity, product stewardship, multiple regression analysis, factor analysis, sustainability
Objavljeno v DKUM: 12.12.2024; Ogledov: 0; Prenosov: 4
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3. Degradation of waste tetra pak packaging with hydrothermal treatment in sub-/supercritical waterMihael Irgolič, Maja Čolnik, Petra Kotnik, Mojca Škerget, 2024, izvirni znanstveni članek Ključne besede: hydrothermal degradation, waste packing, tetra pak, subcritical water, subcritical waste, chemical recycling, one-stage process, two-stage process, product analysis
Objavljeno v DKUM: 16.07.2024; Ogledov: 88; Prenosov: 26
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4. Product assembly assistance system based on pick-to-light and computer vision technologyDarko Hercog, Primož Bencak, Uroš Vincetič, Tone Lerher, 2022, izvirni znanstveni članek Opis: Product assembly is often one of the last steps in the production process. Product assembly is often carried out by workers (assemblers) rather than robots, as it is generally challenging to adapt automation to any product. When assembling complex products, it can take a long time before the assembler masters all the steps and can assemble the product independently. Training time has no added value; therefore, it should be reduced as much as possible. This paper presents a custom-developed system that enables the guided assembly of complex and diverse products using modern technologies. The system is based on pick-to-light (PTL) modules, used primarily in logistics as an additional aid in the order picking process, and Computer Vision technology. The designed system includes a personal computer (PC), several custom-developed PTL modules and a USB camera. The PC with a touchscreen visualizes the assembly process and allows the assembler to interact with the system. The developed PC application guides the operator through the assembly process by showing all the necessary assembly steps and parts. Two-step verification is used to ensure that the correct part is picked out of the bin, first by checking that the correct pushbutton on the PTL module has been pressed and second by using a camera with a Computer Vision algorithm. The paper is supported by a use case demonstrating that the proposed system reduces the assembly time of the used product. The presented solution is scalable and flexible as it can be easily adapted to show the assembly steps of another product.
Ključne besede: product assembly, PTL, pick-to-light, computer vision, LabVIEW, performance analysis
Objavljeno v DKUM: 31.07.2023; Ogledov: 493; Prenosov: 31
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5. Comparative model analysis of two types of clamping elements in dynamic conditionsPetar Todorovic, Borut Buchmeister, Marko Djapan, Djordje Vukelić, Marko Milosevic, Branko Tadic, Milan Radenkovic, 2014, izvirni znanstveni članek Opis: This paper studies the compliance of the fixture-workpiece system. Workpiece clamping case with two types of clamping elements is considered. The first type of clamping element is standard, with flat top, while the second one is specially designed, with round cutting insert. Analyzed was the case of workpiece clamping using small forces, whereby the deformations in the workpiece/clamping element interface are predominantly on the order of magnitude of roughness height. A comparative analysis of dynamic behaviour of both types of clamping elements is also presented. In comparison with its standard counterpart, the specially designed clamping element with round cutting insert has superior clamping performance regarding both tangential load capacity and compliance.
Ključne besede: clamping, clamping element design, product development, machining, cutting, compliance, fixture, roughness, analysis, dinamical behaviour
Objavljeno v DKUM: 11.07.2017; Ogledov: 1193; Prenosov: 111
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6. Matolcsi, Máté: On the relation of closed forms and Trotter's product formula. - J. Funct. Anal. 205, No.2, 401-413 (2003). [ISSN 0022-1236]Miklavž Mastinšek, 2005, recenzija, prikaz knjige, kritika Ključne besede: matematika, teorija operatorjev, Trotter-Katova produktna formula, kvaziskrčljivost, mathematics, analysis, closed sectorial forms, Trotter-Kato product formula, quasicontractivity
Objavljeno v DKUM: 10.07.2015; Ogledov: 807; Prenosov: 31
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7. Analysis of product development on large-scale production with multi-criteria approachTomaž Kostanjevec, Jože Balič, Matej Rajh, 2009, izvirni znanstveni članek Opis: The multi-criteria (MC) method is applied to the development of a large-scale product in the case of mid-price range washing machines using MC approach. The concept represents the method for developing a new product in the production process. The development of a large-scale product on the basis of MC analysis provides more accurate forecasting of the most important parameters in the centrefold of a multidimensional (MD) character in the way of customer demands, and important production and development restrictions areset in this MD environment with aid of MC analysis. The production parameters are identified and through this, there is a possibility of reducing production costs. A forecasting method of production demands as possible result is powerful tool for achieving strategically and concurrent advantage.
Ključne besede: product development, multi-criteria analysis, forecasting, washing machines
Objavljeno v DKUM: 31.05.2012; Ogledov: 2198; Prenosov: 48
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8. Product development simulation with multicriteria analysisTomaž Kostanjevec, Andrej Polajnar, Metka Kostanjevec, 2009, izvirni znanstveni članek Opis: Effective product development rests on a productćs design ability to create a positive product experience. This involves complex transformation of product information from customers to engineers to production to sales and back to customers. This work presents the concept of simulating the development of a new product. The multicriteria analysis of product development in a multi-dimensional space is being used. Based on simulation, the model shows in which direction the product will be developed on the basis of existing information. In the set multi-dimensional space, in which each observation parameter has a designated polar dimensional in terms of dependence on time, development on the basis of selected products is simulated. In an innovative way and in the case of sanitary fittings, simulation of the development of a new product in the early stages of design ideas is shown.
Ključne besede: product development, simulation, multicriteria analysis, multidimensional space
Objavljeno v DKUM: 31.05.2012; Ogledov: 2314; Prenosov: 186
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