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  • Public defence: 2018-05-28 13:00 Albertsalen, Trollhättan
    Haj-Bolouri, Amir
    University West, School of Business, Economics and IT, Divison of Informatics.
    Designing for Adaptable Learning2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The research in this thesis emphasizes the endeavor of designing for adaptable learning. Designing for adaptable learning is understood as an overall response to designing for integration work. Designing for integration work is thus classified as a special case of designing for adaptable learning. Integration work in this research is understood as a professional practice that aims to improve and support the integration process of newly arrived immigrants (referred to as newcomers) in society. As professional practitioners of integration work, integration workers face daily challenges that are wicked by nature. In order to understand and problematize these challenges, the empirical work of this research was organized and performed within a case of digitalizing the civic orientation program in Sweden. The civic orientation program is a special case of integration work in Sweden, where integration workers organize and provide civic orientation to newcomers in Sweden. Different groups of newcomers are subsequently participating in a required 60 hours of civic orientation and are provided sessions through their native language. The integration workers are responsible for organizing and performing civic orientation through a dynamic process of dialogues, exercises, and more. Integration work as a practice, however, does not incorporate a standardized knowledge base, which provides integration workers a unified way of organizing and performing civic orientation. Instead, different counties and municipalities in Sweden organize and perform civic orientation in various ways. Furthermore, due to the extreme heterogeneity among newcomers as participants in civic orientation, the integration workers are forced to adapt. In turn, the integration workers themselves are heterogeneous due to their different roles, areas of responsibilities, and more essentially, worldviews. In order to understand and problematize the aspects of designing for integration work, an explorative approach was adopted through three consecutive cycles of Action Design Research. The cycles were performed from 2013 until completion of this thesis. The thesis was subsequently governed through three research questions: (1) How to design for integration work? (2)What makes designing for integration work significant? (3) Why do design for integration work? There search questions were addressed and answered through a body of produced knowledge that captures and provides the essential contributions of the thesis. The contributions of the thesis highlight different aspects of designing for integration work, as a special case of designing for adaptable learning. Thus, the contributions are presented and discussed with an explicit bearing toward designing for adaptable learning,as the general class of problems and solutions of this research. The contributions are consequently provided through: (1) an ensemble artifact that is termed a digital platform for civic orientation; (2) an Information Systems Design Theory for adaptable e-learning; (3) a design research methodology that incorporates work-integrated learning; (4) the meta-design of an open learning platform that supports the social integration of newcomers in society; and (5) a philosophical concept that problematizes and conceptualizes the essence of presence in e-learning. Ultimately, the research contributes to the research domains of information systems and work-integrated learning, by providing findings that problematize core aspects of designing for adaptable learning. Furthermore, the thesis extensively discusses the findings of this research by emphasizing a philosophical perspective toward core aspects of the research contributions. Finally, the thesis concludes with a set of limitations of the current research and a brief discussion about potential endeavours of future research.

  • Agic, Adnan
    University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
    Analysis of entry phase in intermittent machining2018Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Cutting forces and vibrations are essential parameters in the assessment of a cutting process. As the energy consumption in the machining process is directly affected by the magnitude of the cutting forces it is of vital importance to design cutting edges and select process conditions that will maintain high tool performance through reduced energy consumption. The vibrations are often the cause of poor results in terms of accuracy, low reliability due to sudden failures and bad environmental conditions caused by noise. The goal of this work is to find out how the cutting edge and cutting conditions affect the entry conditions of the machining operation. This is done utilizing experimental methods and appropriate theoretical approaches applied to the cutting forces and vibrations. The research was carried out through three main studies beginning with a force build-up analysis of the cutting edge entry into the workpiece in intermittent turning. This was followed by a second study, concentrated on modelling of the entry phase which has been explored through experiments and theory developed in the first study. The third part was focused on the influence of the radial depth of cut upon the entry of cutting edge into the workpiece in a face milling application. The methodology for the identification of unfavourable cutting conditions is also explained herein. Important insights into the force build-up process help addressing the correlation between the cutting geometries and the rise time of the cutting force. The influence of the nose radius for a given cutting tool and workpiece configuration during the initial entry is revealed. The critical angle i.e. the position of the face milling cutter that results in unfavourable entry conditions has been explained emphasizing the importance of the selection of cutting conditions. Finally, the theoretical methods utilized for the evaluation of the role of cutting edge geometry within entry phase dynamics has been explored. This has revealed the trends that are of interest for selection of cutting conditions and cutting edge design.

  • Johansson, Kristina
    University West, Department of Social and Behavioural Studies, Division of Psychology, Pedagogy and Sociology.
    VILÄR: 7-8 december 20172017Conference proceedings (editor) (Other academic)
  • Public defence: 2018-05-08 10:15 F104, Trollhättan
    Bonilla Hernández, Ana Esther
    University West, Department of Engineering Science, Research Enviroment Production Technology West.
    On cutting tool resource management2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The search for increased productivity and cost reduction in machining can be interpreted as desire to increase the Material Removal Rate, , and maximize the cutting tool utilization. The CNC process is complex and involves numerous constraints and parameters; ranging from tolerances to machinability. A well-managed preparation process creates the foundation for achieving a reduction in manufacturing errors and machining time. Along the preparation process of the NC-program, two different studies have been performed and are presented in this thesis. One study examined the CAM programming process from the Lean perspective. The other study includes an evaluation of how the cutting tools are used in terms of and tool utilization. Two distinct combinations of cutting data might provide the same . However, the tool life and machining cost can be different. Therefore, selection of appropriate cutting parameters that best meet all these objectives is challenging. An algorithm for analysis and efficient selection of cutting data for maximal , maximal tool utilization and minimal machining cost has been developed and is presented in this work. The presented algorithm shortens the time dedicated to the optimized cutting data selection and the needed iterations along the program development. Furthermore, the objectives that need to be considered during the estimation of the manufacturing processes sustainability have been identified. In addition, this thesis also includes a theoretical study to estimate energy use, CO2-footprint and water consumption during the manufacture of a workpiece, which can be invaluable for companies in their search for sustainability of their manufacturing processes.