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  • A. Alkhamisi, Mahdi, et al. (författare)
  • A Monte Carlo Study of Recent Ridge Parameters
  • 2007
  • Ingår i: Communications in statistics. Simulation and computation. - 0361-0918. ; 36:3, s. 535-547
  • Tidskriftsartikel (refereegranskat)
  • A. Alkhamisi, Mahdi, et al. (författare)
  • Developing Ridge Parameters for SUR Model
  • 2008
  • Ingår i: Communication in Statistics, Theory and Methods. ; 37:4, s. 544-564
  • Tidskriftsartikel (populärvet., debatt m.m.)
  • A Asif, Farazee M, 1980-, et al. (författare)
  • Performance analysis of the closed loop supply chain
  • 2012
  • Ingår i: Journal of Remanufacturing. - Germany. - 2210-4690. ; 2:4
  • Tidskriftsartikel (refereegranskat)abstract
    • PurposeThe question of resource scarcity and emerging pressure of environmental legislations has brought a new challenge for the manufacturing industry. On the one hand, there is a huge population that demands a large quantity of commodities; on the other hand, these demands have to be met by minimum resources and pollution. Resource conservative manufacturing (ResCoM) is a proposed holistic concept to manage these challenges. The successful implementation of this concept requires cross functional collaboration among relevant fields, and among them, closed loop supply chain is an essential domain. The paper aims to highlight some misconceptions concerning the closed loop supply chain, to discuss different challenges, and in addition, to show how the proposed concept deals with those challenges through analysis of key performance indicators (KPI).MethodsThe work presented in this paper is mainly based on the literature review. The analysis of performance of the closed loop supply chain is done using system dynamics, and the Stella software has been used to do the simulation. Findings The results of the simulation depict that in ResCoM; the performance of the closed loop supply chain is much enhanced in terms of supply, demand, and other uncertainties involved. The results may particularly be interesting for industries involved in remanufacturing, researchers in the field of closed loop supply chain, and other relevant areas. Originality The paper presented a novel research concept called ResCoM which is supported by system dynamics models of the closed loop supply chain to demonstrate the behavior of KPI in the closed loop supply chain.
  • A Atlasov, Kirill, et al. (författare)
  • 1D photonic band formation and photon localization in finite-size photonic-crystal waveguides
  • 2010
  • Ingår i: OPTICS EXPRESS. - 1094-4087. ; 18:1, s. 117-122
  • Tidskriftsartikel (refereegranskat)abstract
    • A transition from discrete optical modes to 1D photonic bands is experimentally observed and numerically studied in planar photonic-crystal (PhC) L-N microcavities of length N. For increasing N the confined modes progressively acquire a well-defined momentum, eventually reconstructing the band dispersion of the corresponding waveguide. Furthermore, photon localization due to disorder is observed experimentally in the membrane PhCs using spatially resolved photoluminescence spectroscopy. Implications on single-photon sources and transfer lines based on quasi-1D PhC structures are discussed.
  • A. Costa, Nicole, 1988-, et al. (författare)
  • Perceived success factors of participatory ergonomics in ship design
  • 2015
  • Ingår i: Occupational Ergonomics. - 1359-9364. ; 12:4, s. 141-150
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The more complex and perilous a sociotechnical system is, the more crucial it is to have users and other relevant stakeholder groups in focus throughout its design lifecycle. In the design and development of ships and ship systems, there has been resistance towards the integration of ergonomic principles through a human-centred approach as well as to involving the user. This inattention can result in an inadequate design, which may have negative repercussions on usability, ultimately threatening the safety of onboard operations, overall system performance and the well-being of the crew. OBJECTIVE: This study explores the perceived success factors of participatory ergonomics based on the standpoint of young seafarers. METHODS: Such is achieved by examining a focus group with cadets inspired by Grounded Theory approach. RESULTS: The findings reveal user participation as a designer’s essential contact with reality, provided that a set of pre-conditions that supports the success of participatory ergonomics can be fulfilled: involving the right users and filling in the gap between end-user needs and ship-owner requirements. The consequent success factors are described at a usability level, an intrinsic level for the end-users, and ultimately at the level of increased safety and efficiency. CONCLUSIONS: User input may not only affect design as an outcome, it may also influence the way participatory ergonomics is performed in the maritime sector.
  • A Herrera, I, et al. (författare)
  • Comparing a multi-linear (STEP) and systemic (FRAM) method for accident analysis
  • 2010
  • Ingår i: RELIABILITY ENGINEERING and SYSTEM SAFETY. - Elsevier Science B.V., Amsterdam.. - 0951-8320. ; 95:12, s. 1269-1275
  • Tidskriftsartikel (refereegranskat)abstract
    • Accident models and analysis methods affect what accident investigators look for, which contributory factors are found, and which recommendations are issued. This paper contrasts the Sequentially Timed Events Plotting (STEP) method and the Functional Resonance Analysis Method (FRAM) for accident analysis and modelling. The main issue addressed in this paper is the comparison of the established multi-linear method STEP with the new systemic method FRAM and which new insights the latter provides for accident analysis in comparison to the former established multi-linear method. Since STEP and FRAM are based on a different understandings of the nature of accidents, the comparison of the methods focuses on what we can learn from both methods, how, when, and why to apply them. The main finding is that STEP helps to illustrate what happened, involving which actors at what time, whereas FRAM illustrates the dynamic interactions within socio-technical systems and lets the analyst understand the how and why by describing non-linear dependencies, performance conditions, variability, and their resonance across functions.
  • A, Komonen, et al. (författare)
  • Insects associated with fruit bodies of the wood-decaying fungus Oak mazegill (Daedalea quercina) in mixed oak forests in southern Sweden
  • 2012
  • Ingår i: Entomologisk Tidskrift. - 0013-886X. ; 133:4, s. 173-181
  • Tidskriftsartikel (refereegranskat)abstract
    • Polypores host species rich insect assemblages, but relatively few polypore species have been studied in detail. We investigated insect assemblages associated with the fruit bodies of Daedalea quercina, a specialist species on oak in southern Sweden. Fruit bodies (n = 228) were collected from 25 nature reserves and woodland key habitats, and were taken into the laboratory to collect emerging insects. A total of 245 insect individuals were recorded, belonging to at least 45 species. The numerically dominant fungivores were the tineid moths Montescardia tessulatella (n = 38 individuals) and Nemapogon fungivorellus (n = 10) and the coleopteran Ennearthron cornutum (Ciidae) (n = 44). Altogether 40 individuals of hymenopteran parasitoids were recorded, belonging to Braconidae (Exothecinae, Microgastrinae and Rogadinae, altogether 6 spp.), Ichneumonidae (Banchinae, Cryptinae and Orthocentrinae, altogether 4 spp.), Torymidae (1 sp.), Perilampidae (1 sp.) and Scelionidae (1 sp.). Most of the remaining insect species are not specifically associated with fruit bodies, but occupy many types of decaying material. In conclusion, D. quercina hosted a low number of insect individuals in general and only a few coleopteran species. The fungus apparently has only one specialist species, N. fungivorellus, which is a near-threatened (NT) species on the Swedish red list; the record from Norra Vi is the first from the Jönköping. The overall low number of insect individuals and the dominance of Lepidoptera among the fungivores is possibly explained by the tough fruit bodies of D. quercina, which only moths are able to utilize; fruit bodies which had already started to rot were devoid of moths.
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