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  • A. Costa, Nicole, 1988-, et al. (författare)
  • 2014
  • Ingår i: The Royal Institution of Naval Architects - Human Factors in Ship Design & Operation Conference. ; s. 15-26
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • The industry of shipping and ship design involves a set of requirements and business strategies that aim at reliability, efficiency, keeping up with state-of-the-art technology and creating a competitive advantage. Inattention to ergonomics (or human factors) in the process may, however, jeopardize the safety of onboard operations and, in turn, implicate higher costs for the company. Ergonomics and user involvement applied to design through a User-centred Design (UCD) approach is believed to result in several success factors that improve the overall safety and quality of work and life onboard. This study explores and disseminates the success factors of UCD from which seafarers believe they can benefit as ship users. Such is done by cross-examining data from two focus group interviews comprised predominantly by participants with seagoing experience. The results show that the participants perceive UCD as an added value in terms of physical, cognitive, psychosocial and organizational improvements. Communication between stakeholders, usability, safety and satisfaction are a few of the categories that result from the identified success factors. This study conveys a comprehensive summary of the success factors collected in the focus groups, of the corresponding categories and of the affected dimensions of life and work onboard. Such findings represent the importance of UCD for those who operate ships and may serve as an incentive for ship-owners and designers to adopt a UCD approach, as well as for researchers to continue studying this subject further.
  • A.F. Da, Silva, et al. (författare)
  • Growth, electrical and optical properties of SnO2 : F on ZnO, Si and porous Si structures
  • 2009
  • Ingår i: Nanotechnology 2009 : Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - Technical Proceedings of the 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009. - 978-143981782-7 ; s. 352-355
  • Konferensbidrag (refereegranskat)abstract
    • In this work we have analyzed the optical absorption of the ZnO and SnO2:F (FTO) films and applied them in porous silicon light-emitting diodes. The absorption and energy gap were calculated by employing the projector augmented wave method [1] within the local density approximation and with a modeled on-site self-interaction-like correction potential within the LDA+U SIC [2]. Experiment and theory show a good agreement when the optical absorption and optical energy gap are considered. A layer of FTO is deposited by spray pyrolysis on top of porous Si (PSi) or ZnO/(PSi) in order to make the LEDs. The morphology and roughness of the films are analyzed by Atomic Force Microscopy before and after the FTO deposition. The electrical and optical properties are studied by characteristics curves J × V, and electroluminescence intensity versus bias.
  • A Monfared, Behzad, 1983-, et al. (författare)
  • Design and Test of a Domestic Heat Pump with Ammonia as Refrigerant
  • 2011
  • Ingår i: 4th IIR Conference : Ammonia Refrigeration Technology. - France : International Institute of Refrigeration.
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Among alternative refrigerants, ammonia with zero Ozone Depleting Potential (ODP) and Global Warming Potential (GWP), and favorable thermodynamic properties is a sensible choice as a replacement for the synthetic refrigerants, which are powerful greenhouse gases.In this paper, the results of experiments done on a new ammonia water-to-water heat pump prototype at different evaporation temperatures and compressor speeds are reported. The heat pump is designed to deliver 7 kW heat at evaporation temperature of -5°C and condensation temperature of 40°C. The hot discharge gas from compressor is utilized to provide sanitary hot water, and the rest of the heat is used for preheating the tap water and space heating of a single-family house. The compact design of the heat pump helps reducing the refrigerant charge. To reduce the charge further and to prevent oil accumulation at the bottom of evaporator, a minichannel aluminum heat exchanger is used as evaporator.
  • A Monfared, Behzad, 1983-, et al. (författare)
  • Design and Test of a Small Ammonia Heat Pump
  • 2011
  • Ingår i: 10th IEA Heat Pump Conference 2011. ; s. s3_p18
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Since synthetic refrigerants may cause environmental damages, by depleting the ozone layer or by contribution in global warming, many researchers, in recent years, have focused on the use of natural refrigerants such as ammonia to replace the synthetic ones. Although ammonia has been used in large refrigeration systems, its application in small units, say a small heat pump, is quite rare.The work presented in this paper is design and test of a small water-to-water ammonia heat pump, providing about 7 kW heat, sufficient for space heating and tap water heating of a single-family house. To reduce the charge and to overcome the problem of accumulation of oil at the bottom of evaporator, a minichannel heat exchanger is used as evaporator. Oil miscible in ammonia is also used to facilitate the oil return to compressor. A permanent magnet motor together with an inverter is used to run the compressor. Supplying the 7 kW heat, the heat pump runs efficiently with heating capacity to compression work ratio of 5.1 at evaporation and condensation temperatures of -5 °C and 40 °C.
  • Aaboen, Lise (författare)
  • 2014
  • Konferensbidrag (refereegranskat)abstract
    • Production transfers are a result of outsourcing and offshoring decisions. Though, because ofthe strategic focus of the outsourcing literature have not the operational issues of howrelationship development between sender, receiver and raw material been fully depicted. Thepurpose of the present paper is to explore relationship development connected to transfer ofraw material supplies responsibility during transfer of production. To fulfil the purpose, fourdifferent production transfers were studied: three from Sweden to China, Romania andHungary respectively and one transfer from Holland to Sweden. We can see that thedependence and power shifts gradually between the sender and the receiver and therelationship between them sets the arena for what relationship is developed between thereceiver and the raw material suppliers. Furthermore, short social distances can over bridgecultural and technological distances to some extent, because it motivates to take therelationship into a more developed state.
  • Aaboen, Lise, 1978- (författare)
  • Business Incubators as Networks - How and Why?
  • 2008
  • Ingår i: Proceedings of ECEI 2008 The 3rd European Conference on Entrepreneurship and Innovation. - 978-1-906638-15-3 ; s. 1-8
  • Konferensbidrag (refereegranskat)
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