| 1. |
- Almusaed, Amjad, 1967-, et al.
(författare)
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A Research on the Biophilic Concept upon School's Design from Hot Climate : A Case Study from Iraq
- 2022
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Ingår i: Advances in Materials Science and Engineering. - UK : Hindawi Publishing Corporation. - 1687-8434 .- 1687-8442.
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Tidskriftsartikel (refereegranskat)abstract
- In recent years, there have been solid global trends and severe attempts by ministries of education in the world to improve the reality of educational institutions and schools through the design and construction of schools and educational systems that meet the requirements of the age by applying the concepts of sustainable and effective systems to the new generation. They called for a promising future and hence the need to activate the applications of the biophilic schools. The theme of the biophilic schools is closely related to the concept of sustainable environmental structures that deal with the surrounding natural environment with intimacy, which is one of the most important new methods of design and construction at present, where ecological challenges are powerfully evoked in the making of their design decisions. Biophilic schools are an essential part of a new concept that wants to design revolutionary educational systems with new economic outputs that are valuable but do not depart from the idea of sustainable schools in general. It represents an expression given to schools designed to be environmentally sensitive and healthy for their occupants and educational systems based on experience, humanity, and attraction. Indeed, many architects have begun to explore and develop new architectural designs linked with the concepts of biophilic schools. Through the researchers' awareness of the negative circumstance experienced by school buildings in Iraq and by investing in the recommendations of an applied field research, it was reached to crystallize the research problem represented in the obstacles that schools suffer from, which calls for the search for developmental solutions for an efficient educational environment, and in order to reach this goal, by informing researchers about new global experiences in this field, the research presented its hypothesis in choosing the model of biophilic schools that exist in many countries in the world, because of what it can provide from successful and fruitful educational and urban components. The researchers reached many conclusions and recommendations aimed at applying the research hypothesis and achieving its goals.
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| 2. |
- Despeisse, Mélanie, 1985, et al.
(författare)
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A systematic review of empirical studies on green manufacturing: eight propositions and a research framework for digitalized sustainable manufacturing
- 2022
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Ingår i: Production and Manufacturing Research. - : Informa UK Limited. - 2169-3277. ; 10:1, s. 727-759
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Tidskriftsartikel (refereegranskat)abstract
- Manufacturers are facing increasing pressures to adapt their operations to meet sustainability goals. Research and developments on industrial digitalization (aka Industry 4.0) present new opportunities to create and capture value in ever-more complex and connected industrial systems. However, digitalization does not always align with sustainability, and case studies combining these two topics are still scarce. To address these gaps, we adopted a bottom-up approach to (1) identify existing environmental solutions and their implementation challenges by reviewing 208 empirical studies, and (2) formulate eight propositions to guide further work so that digitalization supports environmental improvements more systematically. Finally, a framework for Digitalized Sustainable Manufacturing consisting of four research themes is proposed, pointing to future research needed to align industrial development with sustainable development goals. The propositions and framework aim to structure and focus future research by targeting specifically the challenges encountered when implementing environmental solutions in manufacturing.
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| 3. |
- Jalilzadehazhari, Elaheh, 1985-, et al.
(författare)
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Achieving a trade‐off construction solution using BIM, an optimization algorithm, and a multi‐criteria decision‐making method
- 2019
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Ingår i: Buildings. - Basel, Switzerland : MDPI. - 2075-5309. ; 9:4, s. 1-14
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Tidskriftsartikel (refereegranskat)abstract
- The Energy Performance of Building Directive obligated all European countries to reduce the energy requirements of buildings while simultaneously improving indoor environment quality. Any such improvements not only enhance the health of the occupants and their productivity, but also provide further economic benefits at the national level. Accomplishing this task requires a method that allows building professionals to resolve conflicts between visual and thermal comfort, energy demands, and life‐cycle costs. To overcome these conflicts, this study exploits the incorporation of building information modelling (BIM), the design of experiments as an optimization algorithm, and the analytical hierarchy process (AHP) into a multi‐criteria decision‐ making method. Any such incorporation can (i) create constructive communication between building professionals, such as architects, engineers, and energy experts; (ii) allow the analysis of the performance of multiple construction solutions with respect to visual and thermal comfort, energy demand, and life‐cycle costs; and (iii) help to select a trade‐off solution, thereby making a suitable decision. Three types of energy‐efficient windows, and five types of ground floors, roofs, and external wall constructions were considered as optimization variables. The incorporation of several methods allowed the analysis of the performance of 375 construction solutions based on a combination of optimization variables, and helped to select a trade‐off solution. The results showed the strength of incorporation for analyzing big‐data through the intelligent use of BIM and a simulation in the field of the built environment, energy, and costs. However, when applying AHP, the results are strongly contingent on pairwise comparisons
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| 4. |
- Hedelind, Mikael, et al.
(författare)
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Factory-in-a-Box - Solutions for Availability and Mobility of Flexible Production Capacity
- 2007
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Ingår i: The Swedish Production Symposium,2007.
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Konferensbidrag (refereegranskat)abstract
- The objective of this paper is to present examples of how to realize a flexible and reconfigurable production system. An ongoing research project in Sweden called Factory-in-a-Box will be presented which is one research initiative within this area. The purpose of the Factory-in-a-Box project is to develop solutions for mobile production capacity on demand. Three key features have been identified as enablers for these kinds of production capabilities: mobility, flexibility, and speed. The concept consists of standardized modules that can be installed in e.g. containers and easily transported by trucks, rail vehicles, and boats. The modules can easily be combined into complete production systems and reconfigured for new products and/or scaled to handle new volumes. The goal of the Factory-in-a-Box project is to build fully operative production modules that are developed in close cooperation between different academic and industrial partners. This paper will present the results from these demonstrators giving examples of the usability of the Factory-in-a-Box concept in industry.
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| 5. |
- Wlazlak, Paraskeva, et al.
(författare)
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Original equipment manufacturer (OEM)-supplier integration to prepare for production ramp-up
- 2019
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Ingår i: Journal of Manufacturing Technology Management. - : Emerald Group Publishing Limited. - 1741-038X .- 1758-7786. ; 30:2, s. 506-530
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: Although prior research provides evidence that production ramp-up is often disrupted by supplier-related problems, it fails to discuss how the original equipment manufacturer (OEM) and various types of suppliers integrate their functions and operations to secure preparations for production ramp-up. The purpose of this paper is to investigate OEM–supplier integration in a new product development (NPD) project to prepare for production ramp-up.Design/methodology/approach: The results presented in this paper are based on a real-time, longitudinal study of a single collaborative NPD project in the mechanical engineering industry. The NPD project involves seven suppliers and it is carried out in a large Swedish company (the OEM) and fits the theory-elaborating approach of this research.Findings: This study argues that the aspect of timing in OEM–supplier integration, the OEM’s research and development (R&D) attitude toward collaboration and the OEM’s (R&D) operating procedure are challenges affecting the preparation for production ramp-up. The following three mechanisms to facilitate OEM–supplier integration in order to prepare for production ramp-up are also discussed: the mediator’s role, the OEM’s face-to-face meeting at the project level and suppliers’ formal face-to-face meetings with the OEM and internally.Originality/value: This paper elaborates on and extends prior research on production ramp-up by conducting an empirical analysis that incorporates supplier integration in NPD. It bridges the gap between the literature on production ramp-up and on supplier integration in NPD and clearly indicates that supplier integration is an important prerequisite for successful production ramp-up.
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| 6. |
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| 7. |
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| 8. |
- Grahn, Sten, et al.
(författare)
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Potential Advantages Using Large Anthropomorphic Robots in Human-robot Collaborative, Hand Guided Assembly
- 2016
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Ingår i: Procedia CIRP. - : Elsevier. - 2212-8271. ; 44, s. 281-286, s. 281-286
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Tidskriftsartikel (refereegranskat)abstract
- Collaborative robot installations often mean man-machine workspace sharing. This mode of operation can lead to reductions of tact time and work space requirements. We have analyzed potential further benefits of man-machine collaboration, where operators and powerful robots share workspace, cooperating when lifting and handling large objects. We found that this mode of operation has the potential to generate economic advantages by reducing the need for manual operators and lifting tools and by offering new opportunities for component logistics.
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| 9. |
- Gustafsson, Erik, et al.
(författare)
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Shape Optimization of Castings by using Successive Response Surface Methodology
- 2008
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Ingår i: Structural and multidisciplinary optimization (Print). - : Springer Science and Business Media LLC. - 1615-147X .- 1615-1488. ; 35:1, s. 11-28
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, an optimization routine for a thermomechanical problem is presented. The optimization routine is based on the successive response surface methodology where the panning and zooming technique presented by Stander and Craig has been implemented and improved. The optimization routine has been applied to an optimization problem of a three-dimensional beam that undergoes a solidification process. The material in the beam is assumed to be low-alloyed gray iron. The thermomechanical solidification analysis is uncoupled where, first, a thermal analysis is performed to determine the thermal history. This thermal history is then used to calculate the residual stresses in the beam. The residual stresses are solved by using classical J 2-plasticity with temperature-dependent material properties. The residual stresses from solidification are then carried on to the structural analysis where a mechanical load is applied. These are all linked together via scripts, and the commercial FE software Abaqus is used as the FE solver. The obtained maximum von Mises stress and mass information for every set of parameters are then exported to Matlab where general quadratic response surfaces are fitted by a least square method. Taken together, these response surfaces define a minimum of weight problem, which is solved by using sequential linear programming. To minimize the number of evaluations needed, the parameters are chosen to be D-optimally selected. The numerical results show that the residual stresses from solidification might influence the optimal shape significantly. The residual stress results have been compared with those obtained from casting simulation softwares, and the results are similar. The optimization has been compared with a commercial optimization software and shows very promising results.
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| 10. |
- Lang, Jenny, et al.
(författare)
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Thermo-mechanical reliability and performance degradation of a lead-free RF power amplifier with GaN-on-SiC HEMTs
- 2017
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Ingår i: Materials Science Forum. - : Trans Tech Publications. - 9783035710434 ; , s. 715-718
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Konferensbidrag (refereegranskat)abstract
- RF power amplifier demonstrators containing each one GaN-on-SiC, HEMT, CHZ015AQEG, from UMS in SMD quad-flat no-leads package (QFN) were subjected to thermal cycles (TC) and power cycles (PC) followed by electrical, thermal and structural evaluation. Two types of solders i.e. Sn63Pb36Ag2 and lead-free SnAgCu (SAC305) and two types of TIM materials (NanoTIM and TgonTM 805) for PCB attachment to liquid cold plate were tested for thermomechanical reliability. Changes in electrical performance of the devices namely reduction of the current saturation value, threshold voltage shift, increase of the leakage current and degradation of the HF performance were observed as a result of an accumulated current stress during PC. No significant changes in the investigated solder or TIM materials were observed.
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