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Sökning: WFRF:(Liu Lisa) > Teknik

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  • Liu, Yuanhua, 1971, et al. (författare)
  • Considering the importance of user profiles in interface design
  • 2009
  • Ingår i: User Interfaces. ; , s. 23-
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • User profile is a popular term widely employed during product design processes by industrial companies. Such a profile is normally intended to represent real users of a product. The ultimate purpose of a user profile is actually to help designers to recognize or learn about the real user by presenting them with a description of a real user’s attributes, for instance; the user’s gender, age, educational level, attitude, technical needs and skill level. The aim of this chapter is to provide information on the current knowledge and research about user profile issues, as well as to emphasize the importance of considering these issues in interface design. In this chapter, we mainly focus on how users’ difference in expertise affects their performance or activity in various interaction contexts. Considering the complex interaction situations in practice, novice and expert users’ interactions with medical user interfaces of different technical complexity will be analyzed as examples: one focuses on novice and expert users’ difference when interacting with simple medical interfaces, and the other focuses on differences when interacting with complex medical interfaces. Four issues will be analyzed and discussed: (1) how novice and expert users differ in terms of performance during the interaction; (2) how novice and expert users differ in the perspective of cognitive mental models during the interaction; (3) how novice and expert users should be defined in practice; and (4) what are the main differences between novice and expert users’ implications for interface design. Besides describing the effect of users’ expertise difference during the interface design process, we will also pinpoint some potential problems for the research on interface design, as well as some future challenges that academic researchers and industrial engineers should face in practice.
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  • Liu, Yuanhua, 1971, et al. (författare)
  • Usability Tests as a Benchmarking Tool - A Case Study on Complex Medical Ventilators
  • 2009
  • Ingår i: Contemporary Ergonomics 2009. - 9780415804332 ; , s. 182-188
  • Konferensbidrag (refereegranskat)abstract
    • Medical ergonomics has become an important topic in the field of ergonomics due to the increasing deficiencies in medical device design. The aim of the present study was to use usability testing as a benchmarking tool of modern and complex ventilator machines in a real hospital setting to propose future redesign ideas for a target machine – SERVO-i. A usability study was carried out at the neonatal intensive care unit (ICU) with 6 expert nurses. During the tests, an artificial lung was used to simulate the real treatment context on a neonatal patient. A number of potential usability problems were detected on SERVO-i. Using Babylog and Stephanie as two reference machines, the strengths and weaknesses of SERVO-i were identified as well. Some valuable lessons were learnt from the study, which could be used as guidance for the choice of test subjects and control of tests in real life human-machine working environments.
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  • Ekstrand, Lisa, 1974, et al. (författare)
  • Characterization of thermally conductive epoxy nano-composites
  • 2005
  • Ingår i: 28th International Spring Seminar on Electronics Technology: Meeting the Challenges of Electronics Technology Progress, 2005; Wiener Neustadt; Austria; 19 May 2005 through 20 May 2005. - 9780780393240 ; 2005, s. 35-39
  • Konferensbidrag (refereegranskat)abstract
    • This work aims to develop an Anisotropic Conductive Adhesive (ACA) paste with improved thermal conductivity. ACA consists of a polymer based resin and conductive filler particles. We introduce an electrically insulating but thermally conductive phase into the adhesive. Nano and micro scale particles of alumina oxide, silicon carbide and carbon nanotubes are used with and without surface treatment. The thermal measurements are carried out by transient hot wire method. So far, the thermal conductivity of the epoxy has been increased with more than 100%.
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  • Toller, Lisa, 1990-, et al. (författare)
  • Investigation of Cemented Carbides with Alternative Binders after CVD Coating
  • 2017
  • Ingår i: International journal of refractory metals & hard materials. - : Elsevier BV. - 0263-4368. ; 62, s. 225-229
  • Tidskriftsartikel (refereegranskat)abstract
    • Due to health concerns surrounding the use of cobalt as a binder for tungsten carbide in cemented carbides there is a drive to find an alternative binder. Although there are many publications on cemented carbides with alternative binders very few consider the possibility to coat these materials. In this work four different binder compositions containing iron-nickel or iron-nickel-cobalt and a pure cobalt reference are investigated with respect to coating ability. It is shown that it is possible to coat these cemented carbides with alternative binders through the same chemical vapor deposition process that is commonly used for cobalt based inserts and get similar coating structure. It is further shown that it can be done without the formation of η-phase and with comparable scratch test adhesion.
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