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  • Lukkassen, D.
    et al.
    UiT The Arctic University of Norway.
    Persson, Lars-Erik
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). UiT The Arctic University of Norway.
    Tephnadze, G.
    The University of Georgia, Georgia.
    Tutberidze, G.
    UiT The Arctic University of Norway; The University of Georgia, Georgia.
    Some inequalities related to strongconvergence of Riesz logarithmic means2020In: Journal of inequalities and applications (Print), ISSN 1025-5834, E-ISSN 1029-242X, article id 79Article in journal (Refereed)
    Abstract [en]

    In this paper we derive a new strong convergence theorem of Riesz logarithmicmeans of the one-dimensional Vilenkin–Fourier (Walsh–Fourier) series. Thecorresponding inequality is pointed out and it is also proved that the inequality is in asense sharp, at least for the case with Walsh–Fourier series.

  • Høibakk, Ralph
    et al.
    Lukkassen, Dag
    UiT The Arctic University of Norway.
    Meidell, Annette
    UiT The Arctic University of Norway.
    Persson, Lars-Erik
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). UiT The Arctic University of Norway.
    A New Look at the Single Ladder Problem (SLP) via Integer Parametric Solutions to the Corresponding Quartic Equation2020In: Mathematics, E-ISSN 2227-7390, Vol. 8, no 2, article id 267Article in journal (Refereed)
  • Public defence: 2020-04-17 10:00 11D257 Agardhsalen, Karlstad
    Lindroos-Moll, Sebastian
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School (from 2013).
    Värdering vid upprättande av kontrollbalansräkning: En aktiebolagsrättslig och redovisningsrättslig studie2020Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The aim of the study is to investigate how valuation shall be carried out in drawing up balance sheet for liquidation purposes and whether valuation rules, in particular, and rules on involuntary liquidation due to capital deficiency, in general, need to be changed.

    It is stated in Ch. 25, sect. 13, Swedish Companies Act (SCA), that the board is under the obligation to draw up a balance sheet for liquidation purposes without delay when there is reason to expect that the company's own capital is less than half of the registered shareholder equity. Balance sheet for liquidation purposes shall be drawn up pursuant to applicable law on annual reports, but in calculating its own assets a number of adjustments may be made. The study focuses on the meaning of valuation consistent with the generally accepted accounting principles (Swedish GAAP), and reporting assets at net realisable value.

    In the 1970s, it was stated that the Swedish GAAP was an actual existing praxis in a qualitatively representative circle of parties under duty to keep accounts, an identified praxis among the actors. This description is far from the present situation as it is specifically stated in the general guidelines issued by the Swedish Accounting Standards Board (BFN) that private companies must comply with their guidelines.

    Among other things in this study, the role of the guidelines issued by the BFN are investigated and analysed in terms of their constitutional status regarding norm setting. The study includes a comparison of the Danish, Norwegian and Finnish rules on “serious loss” of the subscribed capital.

    One conclusion is that, under the current Swedish regulations regarding obligation to liquidate due to capital deficiency, there is room for changes which would reduce the distance between intended functions and the wording of the law. A more long-term solution, however, would require a total review of capital protection rules.

  • Sandelin, Kenneth
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for the Studies of Social Sciences Didactics (from 2013). Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Political, Historical, Religious and Cultural Studies (from 2013).
    Historieundervisning i mångkulturella klassrum på grundskolans högstadium: En analys av lärares narrationer utifrån deras tal om sin historieundervisning2020Licentiate thesis, monograph (Other academic)
    Abstract [sv]

    Vilket innehåll kännetecknar historieundervisningen i klasser där samtliga eleverna har sin bakgrund i icke- europeiska länder? Hur ser innehållet ut i historieundervisningen i klasser där tvärtom alla eleverna har sin bakgrund i Sverige? Frågorna ledde fram till syftet för denna studie: att undersöka hur historielärare på grundskolans högstadium talar om innehållsval i mångkulturella klasser.

    Studiens datainsamlingsmetod utgörs av intervjuer, både individuella och fokusgruppsintervjuer. De lärare som kom att medverka i studien har alla stor erfarenhet av att undervisa i mångkulturella klasser på grundskolans högstadium.

    Resultaten av studien visar att lärare befinner sig i en balanssituation i skiljelinjen mellan ämnestradition, styrdokument och elever. Vidare framgår av samtalen att utgångspunkten för allt innehållsurval utgörs av den traditionella västerländska berättelsen, som i studien benämns ”det dominerande narrativet”. Beroende på klasskontext öppnas narrativet upp. I klasser med en hög andel elever med annan bakgrund än Sverige öppnas narrativet upp mot en minoritetsanpassning.

    Även i klasskontexter med få elever med annan bakgrund än Sverige har innehållet genomgått förändringar, men helt inom ramen för det dominerande västerländska narrativet. Det samtalas bland annat om andra sätt att bruka tid på än den traditionella kronologiska. Vidare hanteras delar av det traditionella narrativet utifrån olika perspektiv. Allt inom ramen för en majoritetsanpassning.

    Studiens bidrag kan uttryckas som att den synliggör den komplexa situation som historielärare befinner sig i, samtidigt som erfarna lärare har utvecklat strategier. Avslutningsvis hoppas jag att undersökningen bidrar till att nyansera bilden av en historieundervisning som fortgår som den alltid har gjort.

  • Ali Shah, Usman
    et al.
    University of Engineering and Technology at Peshawar, Pakistan.
    Yousaf, Suhail
    University of Engineering and Technology at Peshawar, Pakistan.
    Ahmad, Iftikhar
    University of Engineering and Technology at Peshawar, Pakistan.
    Ur Rehman, Safi
    Karakoram International University, Pakistan.
    Ahmad, Muhammad Ovais
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013).
    Accelerating Revised Simplex Method using GPU-based Basis Update2020In: IEEE Access, E-ISSN 2169-3536, Vol. 8, p. 52121-52138Article in journal (Refereed)
    Abstract [en]

    Optimization problems lie at the core of scientific and engineering endeavors. Solutions to these problems are often compute-intensive. To fulfill their compute-resource requirements, graphics processing unit (GPU) technology is considered a great opportunity. To this end, we focus on linear programming (LP) problem solving on GPUs using revised simplex method (RSM). This method has potentially GPU-friendly tasks, when applied to large dense problems. Basis update (BU) is one such task, which is performed in every iteration to update a matrix called basis-inverse matrix. The contribution of this paper is two-fold. Firstly, we experimentally analyzed the performance of existing GPU-based BU techniques. We discovered that the performance of a relatively old technique, in which each GPU thread computed one element of the basis-inverse matrix, could be significantly improved by introducing a vectorcopy operation to its implementation with a sophisticated programming framework. Second, we extended the adapted element-wise technique to develop a new BU technique by using three inexpensive vector operations. This allowed us to reduce the number of floating-point operations and conditional processing performed by GPU threads. A comparison of BU techniques implemented in double precision showed that our proposed technique achieved 17.4% and 13.3% average speed-up over its closest competitor for randomly generated and well-known sets of problems, respectively. Furthermore, the new technique successfully updated basisinverse matrix in relatively large problems, which the competitor was unable to update. These results strongly indicate that our proposed BU technique is not only efficient for dense RSM implementations but is also scalable.

  • Jerkeby, Stefan
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Educational Studies (from 2013).
    Undervisning som osäkerhetshantering och lärande som självändamål: Analyser, förståelser och undervisningsideal i ett lacanskt perspektiv2020Book (Other academic)
    Abstract [sv]

    Boken ger exempel på analyser av sociala konflikter och språkbruk samt problematiserar olika former av värdegrundsarbete i svensk grundskola och på gymnasiet. Genom en serie teoretiska och empiriska illustrationer utvecklas ett förståelsebegrepp lämpligt för att hantera den osäkerhet och omedvetenhet som kan prägla undervisningssituationer.

  • Voronkov, Artem
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013).
    Usability of Firewall Configuration: Making the Life of System Administrators Easier2020Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Firewalls are an important component of network security that serve to protect networks by regulating incoming and outgoing traffic. However, setting up firewalls correctly is a challenging task, which becomes more difficult with the growth of the network's size. Firewall configuration files consist of rule sets that might be hard to understand even for professionals who deal with them regularly. The main reason for this is that most firewall rule sets have a certain structure: the higher the position of a rule in the rule set, the higher priority it has. Challenging problems arise when a new rule is added to the set and a proper position for it needs to be found or the existing rules are removed due to a security policy change. This brings us to the usability problem associated with the configuration of firewalls.

    The overall aim of this thesis is to help system administrators better manage firewalls. We explore three different aspects of firewall configuration: 1) the syntax of rules, 2) the organization of rules in a rule set, and 3) the way rule sets are presented to a user. Using this acquired knowledge, we offer system administrators more usable firewall solutions and approaches to the configuration process that can help facilitate their daily work.

  • Berglund, Teresa
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).
    Student views of environmental, social and economic dimensions of sustainable development and their interconnectedness: A search for the holistic perspective in education for sustainable development2020Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The work in this thesis centers on upper secondary students’ views of the environmental, social and economic dimensions of sustainable development and their interconnectedness. The focus has been to study the diversity of students’ views in various contexts. The research uses as its starting point the aims of education for sustainable development to facilitate a holistic understanding among students, which implies the consideration of environmental, social and economic perspectives when dealing with issues of sustainability.

    A mixed methods and iterative approach was applied in this research. Two data sets were collected: one larger-scale data set from 638 students in grade 12 (aged 18-19) on science and social science programs, and one smaller set involving 18 students of similar age and programs. In the first data collection exercise, the students responded to questionnaires investigating their sustainability consciousness and decision-making within different everyday contexts. The aim of the second data collection exercise was to study, in-depth, patterns of students’ views on the interconnectedness of sustainability dimensions. 

    The results reveal a diversity of student views that specifically relate to the economic dimension in sustainable development. The economic dimension is perceived differently in their sustainability consciousness, and when they encounter the economic dimension in various sustainability contexts. Moreover, there are four distinctly different beliefs among students about the interconnectedness of the economy and sustainable development. The four beliefs are identified as the un-differentiating positive, the nuanced ambivalent, the two-way convinced and the critical, differing in their arguments about the interconnectedness of environmental, social and economic dimensions. The findings indicate the potential resource students’ views and different contexts can represent in teaching that aims at perspective-shifting and learning about the complexity and dynamic nature of sustainability issues.

  • Bergvall, Åke
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Language, Literature and Intercultural Studies (from 2013).
    Apocalyptic History and the Protestant Cause in Sir Philip Sidney’s Revised “Arcadia” by Barbara Brumbaugh.2020In: Renaissance quarterly, ISSN 0034-4338, E-ISSN 1935-0236, Vol. 73, no 2Article, book review (Refereed)
  • Samuelsson, Johan
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for the Studies of Social Sciences Didactics (from 2013). Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Political, Historical, Religious and Cultural Studies (from 2013).
    Skola inför rätta: Tolkning och användning av skolhistoria i samtidens debatt om framtidens samhälle och skola2019In: Nordic Journal of Educational History, ISSN 2001-7766, E-ISSN 2001-9076, Vol. 6, no 2, p. 23-44Article in journal (Refereed)
    Abstract [en]

    School on Trial: Interpretation and Use of School History in Contemporary Debate About the Future of Society and School. This article centres on how education and the Swedish School Commission as an historical phenomenon become resources in the discussion on how society and education should be developed. Three authors’ texts on the School Commission are analysed based on narrative history theory, which engages in how history is used to legitimise political change. Education and the School Commission are inscribed in a national narrative of decline. The 1946 Commission is blamed for the perceived problems in present society and education, allegedly having caused a lack of focus on nationalism, morals and knowledge in Sweden. To change society, the message is, education must learn from the historical mistake of the Commission and invest in knowledge and nationalism. The narrative plot is reminiscent of other historical narratives, for example, of heroes (teachers) and villains (Alva Myrdal), who personify structural changes. The historical narrative of education also fits in with contemporary trends of modernism criticism.