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  • 1.
    Kajtazi, Miranda
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    An Exploration of Information Inadequacy: Instances that Cause the Lack of Needed Information2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Information is one of the most essential resources in our contemporary societies, as it guideshuman thinking, planning and subsequent actions, which in turn generates consequencesthat are desired or not. The Lehman Brothers bankruptcy in 2008, the tsunami in Indonesiain 2004, the Space Shuttle Challenger destruction in 1986 are just three instances ofdramatic situations, emerging continuously, where information plays a crucial role. Thisstudy investigates the phenomenon of the lack of needed information, predominantlyexperienced with difficulties in human, social and industrial affairs. Consequently, thechallenge is to understand why such situations emerge. Two approaches are utilized toexplore this challenge using an interpretivist tradition. The first is a hermeneutic approach,the second a grounded theory approach. The first approach – theoretically oriented –investigates numerous theoretical bodies, selected with the assumption that they can explainthe addressed challenge. The results show that there are no comprehensive theoreticalbodies that can fully account for the phenomenon of the lack of needed information.Furthermore, there is no consensus on what “information” is – the very core of thechallenge, which gave the foundations for a formulation of an alternative notion ofinformation and is instrumental for the present investigation. Thus, no a priori theory isused to guide the empirical investigation. The second approach – empirically oriented –investigates fifty empirical cases, where the lack of needed information is clearly manifested.The results present an initial outline for a possible future theory of information inadequacy,constituted by the dichotomy of information-lack and information-overflow. Informationlackis dominated by: “information is non-existent”, “information is insufficient”, “information is censored” and “information is undelivered”. Whereas, information-overflow isdominated by: “information is ambiguous”, “information is redundant”, “information isirrelevant” and “information is undervalued”. The two main dichotomous characteristics andtheir interrelations result in patterns of various information inadequacies. The keyconclusion of the present study is that while dramatic situations are increasing everyday,there is as yet no theoretical body designed to comprehensively account for the phenomenonin context; only partial accounts are found. Thus, the empirical investigation suggests thatthe phenomenon of the lack of needed information seems to emerge because of diversefactors, ranging from political and cultural structures, through human individualcapabilities, and ending with procedural and technological artefacts. This study advocatesthat further research is needed to fully account for and explain instances of the lack ofneeded information, and that such an account requires an innovative and interdisciplinary focus.

  • 2.
    Dahl, Marianne
    University of Gothenburg.
    Barns sociala liv på fritidshemmet: En studie om praktikgemenskaper och alliansbildning i egenstyrda aktiviteter2011Licentiatavhandling, monografi (Annet vitenskapelig)
  • 3.
    Danylenko, Antonina
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Decisions: Algebra and Implementation2011Licentiatavhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    Processing decision information is a constitutive part in a number of applicationsin Computer Science fields. In general, decision information can be used to deduce the relationship between a certain context and a certain decision. Decision information is represented by a decision model that captures this information. Frequently used examples of decision models are decision tables and decision trees. The choice of an appropriate decision model has an impact on application performance in terms of memory consumption and execution time. High memory expenses can possibly occur due to redundancy in a decision model; and high execution time is often a consequence of an unsuitable decision model.

    Applications in different domains try to overcome these problems by introducing new data structures or algorithms for implementing decision models. These solutions are usually domain-specificand hard to transfer from one domain to another. Different application domains of Computer Science often process decision information in a similar way and, hence, have similar problems. We should thus be able to present a unifying approach that can be applicable in all application domains for capturing and manipulating decision information. Therefore, the goal of this thesis is (i) to suggest a general structure(Decision Algebra) which provides a common theoretical framework that captures decision information and defines operations (signatures) for storing, accessing, merging, approximating, and manipulating such information along with some general algebraic laws regardless of the used implementation. Our Decision Algebra allows defining different construction strategiesfor decision models and data structures that capture decision information as implementation variants, and it simplifies experimental comparisons between them.

    Additionally, this thesis presents (ii) an implementation of Decision Algebra capturing the information in a non-redundant way and performing the operations efficiently. In fact, we show that existing decision models that originated in the field of Data Mining and Machine Learning and variants thereof as exploited in special algorithms can be understood as alternative implementation variants of the Decision Algebra by varying the implementations of the Decision Algebra operations. Hence, this work (iii) will contribute to a classification of existing technology for processing decision information in different application domains of Computer Science.

  • 4.
    Mångs, Andreas
    Linnéuniversitetet, Fakultetsnämnden för ekonomi och design, Ekonomihögskolan, ELNU.
    Essays on Self-employment: A Gender Perspective2011Licentiatavhandling, med artikler (Annet vitenskapelig)
  • 5.
    Glaser, Joakim
    Malmö university, Sweden;Lund university, Sweden.
    Med muren i backspegeln: Nationens betydelse för ungas identitetsskapande i östra Tyskland2011Licentiatavhandling, monografi (Annet vitenskapelig)
  • 6.
    Mansour, Osama
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Share with Social Media: The Case of a Wiki2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Traditional approaches to knowledge collaboration and sharing have proven to be limited in the sense of addressing organizational needs of dynamic and distributed knowledge. More recently, the emergence of social media and the second generation of web technologies have introduced new ways and possibilities for sharing knowledge in organizations. In particular, the wiki technology, as one type of social media, is argued to mark a shift in the way people collaborate and share knowledge with each other on the web. It represents a new, open style of knowledge collaboration and sharing which allows anyone to freely and openly create and shape knowledge. In this respect, organizations have been attracted by this new dynamic approach which is based on open collaboration and flexible participation. More organizations are using wikis in order to effectively leverage distributed knowledge and improve their competitive edge. Against this backdrop, this research is concerned with examining how such organizations use social media, the wiki technology in particular, for sharing knowledge among individuals and groups. The aim is twofold: to develop an understanding of the ways by which these individuals and groups exchange and share knowledge with each other and to identify different factors that influence knowledge collaboration and sharing using a wiki in an organizational setting. The research is based on three published research papers which provide both theoretical and empirical accounts of knowledge collaboration and sharing using wikis. To these ends of this research, an interpretive case study was used as an empirical research method with interviews as primary sources of data. Several other data sources have been triangulated during the empirical inquiry including field visits, observations, and documents. The case took place at a large multinational organization that used a wiki as a collaborative platform to support knowledge sharing among members of several professional communities of practice. Eventually, the outcome of the research is a thorough understanding that describes knowledge collaboration and sharing using a wiki as a dynamic social process involving recursive and dynamic social interactions among members of communities of practice through which knowledge is collaboratively constructed and reconstructed and thus shared. It also presents a dual impact of wiki openness on knowledge collaboration and sharing within organizations.

     

  • 7.
    Yurova, Ekaterina
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Study of ergodicity of p-adic dynamical systems with the aid of van der Put basis2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The study of p-adic dynamical systems is motivated by their applications in various (and surprisingly diverse) areas of mathematics, e.g., in physics, genetics, biology, cognitive science, neurophysiology, computer science, cryptology, etc.

    In this thesis we use decomposition of a continuous function f : zp -> zp into a convergent van der Put series to determine whether f is 1-Lipschitz, measure-preserving and/or ergodic.

    The main mathematical tool used in this research is the representation of the function by the van der Put series, which are special convergent series from p-adic analysis.

    This is the first attempt to use the van der Put basis to examine the properties of (discrete) dynamical systems in fields of p-adic numbers. Note that the van der Put basis differs fundamentally from previously used ones, for example, the monomial and Mahler bases, which are related to the algebraic structure of p-adic fields.

    The van der Put basis is related to the zero dimensional topology of these fields (ultrametric structure), since it consists of characteristic functions of p-adic balls; i.e., the basic point in the construction of this basis is the continuity of the characteristic function of a p-adic ball.

  • 8.
    Eliasson, Lars
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Ställ krav på virket: Rätt virke för produktion i framtidens trähusfabrik2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [sv]

    Denna avhandling behandlar den svenska trähusbranschens behov och möjligheter att erhålla trämaterial med egenskaper som uppfyller de krav som produktion och slutkund ställer. Ett gemensamt problem för den svenska trähusbranschen är de kvalitetsbrister hos det virke sombranschens företag köper för sin produktion, som kan resultera i merkostnader för branschen med 100 MSEK årligen.

    Trähusföretagen uttrycker en viss uppgivenhet över bemötandet från virkesleverantörerna. Virkesleverantörerna å sin sida menar att köparna av trämaterial inklusive företagen i trähusbranschen i ringa utsträckning genomför reklamationer. Avgörande för genomförda virkesaffärer är ofta priset – det blir affär med den som erbjuder lägst pris. Sammantaget innebär detta att det inte blir någon dialog mellan leverantör och köpare som utvecklar synsättet på trämaterialkvalitet.

    Avhandlingsarbetet har bland annat behandlat beredning av träråvaran till färdiga ämnen t.ex. studier vid tillverkning av kvistfria ämnen. Resultatet av arbetet visar på vikten av att genomföra utvärderingar av material och leverantörer. Resultatet visar vidare att kapkostnaden för färdiga träämnen inkl. spill är ca 1/3 av ämneskostnaden. Dock är kostnaden för trämaterialet låg i relation till totalkostnaden för det färdiga huset vilket innebär att ett högre pris för ett virke som fullt ut motsvarar kravspecifikationerna i liten utsträckning påverkar totalkostnaden för huset.

    Råd till trähusbranschen är att ställa krav på virkesråvaran, utvärdera material och leverantörer samt att trähusbranschen ska sikta mot att bli en modern tillverkningsindustri i likhet med de mest framgångsrika inom verkstadsindustrin.

  • 9.
    Ciganovic, Renato
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Supportability Engineering in Wind Power Systems - Who Cares?: Considering important stakeholders and their requirements2011Licentiatavhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    Wind power is one of the fastest growing energy sources, which have advantages in terms of delivering clean, cheap and fast energy. Many actors and organizations have realized this potential, which has lead to exponential growth of the wind power over recent couple of years. Despite promising future of clean and green energy through wind there are still areas to be improved to tackle main hinders for further development on a larger scale. The larger scale development of wind power has up-to-date been reached in only few countries such asDenmarkandGermany. The most potential can be found through offshore wind turbines due to, among other, lesser height and noise restrictions than inland wind turbines as well as better wind resources.

    This thesis is mainly characterized by the mixed-method method, which is in its turn characterized by mixing different research methods such as induction, deduction and abduction as they might be suitable to apply during the different stages of the research process. In this thesis the system approach will be considered to model the scope of this study’s context. As this thesis was constructed as a theoretical study the systematic literature review was used as the main source for data collection. The synthesis of the reviewed articles was initially performed in a broad manner to show overall picture of research related to the scope of this thesis. In the following step, the adopted LCM tool was used to extract study specific data from the reviewed and additional articles. This enabled to link some of the current problems, in wind power area, and ‘unfulfilled’ stakeholder requirements.   

    This thesis aim was to identify important stakeholders and to address their respective requirements within the scope of supportability engineering applied in the wind power context, particularly stakeholder requirements that have not been considered by previous research. The purpose of it was to compare different requirements with current issues in the wind power sector. Conducted systematic literature review showed significant and costly (development) issues related to the supportability engineering such as reliability, availability, maintainability, accessibility problems etc. This was fully in line with the stakeholders’ requirements, which in several cases demanded higher dependability i.e. availability performance and its influencing factors. 

    The thesis also included definition of supportability engineering framework, through comparing several widely accepted and standardized theoretical concepts. This comparison enabled definition of more focused approach with requirements on the ‘supported system’ and to lesser extent the ‘support system’. These requirements are usually mixed within the different theoretical concepts. 

    The main findings from this study are that application of supportability engineering framework would lead to earlier identification of important stakeholders and their requirements. Considering these requirements, for instance availability and maintainability of the wind turbines, at earlier stages of the life cycle through better design and improved supportability infrastructure could potentially decrease amount of current problems in the wind energy sector in particular for the offshore part. Another result was that different stakeholders and their requirements were identified. Thesis contribution overall was a new ‘refined approach’ to deal with supportability issues through supportability engineering framework, whose main focus is the ‘supported system’.

  • 10.
    Anderson, Pia
    Stockholm University.
    Textuell makt: Fem gymnasieelever läser och skriver i svenska och samhällskunskap2011Licentiatavhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    The aim of this thesis was to study how five students linguistically express textual power in conversation and writing about reading, as well as to investigate their possibilities to linguistically express textual power. The study was performed within some of the literacy practices in the subjects of Swedish and Social Studies at the social sciences programme in upper secondary school. “Textual power” is here defined as both ability and possibility: to position oneself in relation to the text, to read/interpret critically and to show mobility in the actual literacy sphere. Two analytical tools were used: Langer’s theories about envisionment building and Martin & White’s appraisal framework for attitude and engagement. The linguistic expressions are contextualised in a model inspired by Linell. I base my discussion of the students’ mobility in the actual literacy sphere on the New Literacy theories of Barton and Street, while Anward gives the means to understand text-reproducing practices. The results indicate that the students used a limited range of positions in relation to texts, rarely expressed critical literacy and showed limited mobility in the actual literacy spheres. The students’ possibilities to linguistically express textual power were determined by the design of the teaching contexts. The students were given few possibilities to develop their ability to linguistically express textual power. To compensate for this, the students used a strategy of task solving. This caused a gap between ideally desired and actually produced text. The acceptance of the gap can be explained if the practice is considered text-reproducing. The literacy sphere where the students found themselves seems to consist of an ecological system based on a consensus-driven text-reproducing practice where critical and comparative reading and writing do not take root and thrive.

  • 11.
    Blyberg, Louise
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för teknik, TEK.
    Timber/Glass Adhesive Bonds for Structural Applications2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Timber with its natural appearance and glass with its transparency may be appealing material for architects and users of modern buildings. Glass is a brittle material, but it is about six times stiffer than timber. Combined appropriately, the materials could form different types of composite products, e.g. beams or shear walls, that can be included in the load-carrying structure of buildings. e knowledge on load- carrying timber/glass components is limited. e intention of this research has been to contribute to the knowledge required for the industry to be willing to produce timber/glass components for the market.

    The thesis includes experimental testing accompanied with complementary nite element simulations, which provide more details and information about the test results. Tests were performed on small-scale specimens with a bond area of 800 mm2 as well as on I-beam and shear wall prototypes. For the small-scale specimens tested in standard climate, three different adhesives were used for the bond line between timber and glass. ese specimens were tested in both tension and shear. In addition, one of the adhesives was used for small-scale shear specimens which were exposed to different humidity levels before the tests were performed. e 4 m long I-beam prototypes designed with a web of glass and wooden anges were tested in four- point bending. e shear wall prototypes were tested by applying either a vertical load, a horizontal load or a combination of these, all being applied in the plane of the shear wall.

    Of the three adhesives used in the small-scale testing, an acrylate adhesive had the largest strength, both in tension and in shear. e study on the effect of humidity was performed with this adhesive. is study indicates that the adhesive properties do not change dramatically in indoor climate. is adhesive was also used for twelve of the fourteen tested I-beams. e results from the beams show that a signi cant redundancy is obtained; the load at the nal failure was around 240 % of the load when the rst crack in the glass web appeared. e shear walls were glued using the acrylate adhesive and for a few cases a 2-component silicone based adhesive. e results from the shear wall tests showed the shear wall to behave in a much more brittle manner, without any noticeable redundancy.

  • 12.
    Pettersson, Oskar
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Towards a Mobile Learning Software Ecosystem2011Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The ability to carry communication services around, combined with the ubiquitous presence of computing technology, affects everything we do from how we pay for things to how we expect to interact with public institutions such as schools. There are now plenty of systems that convey education by utilizing mobile devices. As an extension of technology moving towards ubiquity, there are efforts aiming to bring this to an educational use as well. Efforts in this direction are channelized in the field of mobile learning. The speed of technological development, and the possibilities it brings introduces a large number of challenges when implemented in educational settings. These challenges can be related to for example pedagogical aspects, tools, implementations and organizations. Recent developments including the notions of learning ecosystems, learning landscapes and organizations suggest that the domain of mobile learning can be negatively affected from the lack of a systematic reuse approach. This thesis pursues these challenges by investigating how systematic reuse can be promoted in mobile learning systems.

    A collection of five peer-reviewed publications that elaborates on the different stages of the research process pursuing the main research question forms the core of this thesis. This research process includes a survey stage, elaborating on different aspects related to reuse and mobile learning, an analysis stage that resulted in a descriptive model and several additional domain models; and finally a stage where the descriptive model is refined into a reference model for mobile learning ecosystems. The outcomes of these activities and the analysis of these results provide some fundamental building blocks regarding how to approach the challenge of reuse in mobile learning systems. The proposed reference model can be considered as the first step towards the creation of a common vocabulary that can be used to compare Software Ecosystems within the domain of mobile learning. 

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