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  • Resultat 168801-168810 av 290014
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168801.
  • Magnusson, Frans, 1981, et al. (författare)
  • Morphology & Development - knowledge management in architectural design computation practice
  • 2017
  • Ingår i: Proceedings of the International Conference on Education and Research in Computer Aided Architectural Design in Europe. - 2684-1843. ; 2, s. 683-690
  • Konferensbidrag (refereegranskat)abstract
    • In this paper we address the problem of knowledge management in architectural design computation practice, reflecting on our practice at Dsearch - a design computation network within White arkitekter. As a means to investigate relevant aspects of visual scripting, we introduce the notions of code, algorithm and note. We also introduce two different modes of operation within architectural practice: morphology and development - which help us distinguish the diverse knowledge types typically occurring in the structure of visual scripts. We describe two sets of tools developed by Dsearch to continuously integrate planning and documentation with design development work. The main conclusion from our practical experience of this approach is that it allows critical reflection into an efficient workflow. This constitutes a new kind of practice based and action oriented knowledge that can be curated in the form of design narratives.
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168802.
  • Magnusson, Fredrik, et al. (författare)
  • Symbolic Transformations of Dynamic Optimization Problems
  • 2014
  • Ingår i: Proceedings of the 10th International Modelica Conference. - 1650-3686. - 9789175193809 ; 1650-3740:96, s. 1027-1036
  • Konferensbidrag (refereegranskat)abstract
    • Dynamic optimization problems involving differential-algebraic equation (DAE) systems are traditionally solved while retaining the semi-explicit or implicit form of the DAE. We instead consider symbolically transforming the DAE into an ordinary differential equation (ODE) before solving the optimization problem using a collocation method. We present a method for achieving this, which handles DAE-constrained optimization problems. The method is based on techniques commonly used in Modelica tools for simulation of DAE systems. The method is evaluated on two industrially relevant benchmark problems. The first is about vehicle-trajectory generation and the second involves startup of power plants. The problems are solved using both the DAE formulation and the ODE formulation and the performance of the two approaches is compared. The ODE formulation is shown to have roughly three times shorter execution time. We also discuss benefits and drawbacks of the two approaches.
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168803.
  • Magnússon, Gunnlaugur, 1979- (författare)
  • Enacting Contradictory educational ideals : Balancing marketization and social inclusion in practice
  • 2017
  • Konferensbidrag (refereegranskat)abstract
    • BackgroundThe marketization of education is an international phenomenon, with widespread consequences for schools, teachers and pupils. The marketization of the Swedish education system is a particularly interesting and extreme case in the international and European context. The realisation of market ideology in the Swedish education system can be viewed as a success in terms of its implementation and public and political acceptance. For instance, the proportions of pupils attending independent schools and the number of independent schools have grown exponentially, and school choice is seen as a democratic right and supported by most established political parties. However, there are several problems. Most importantly, market elements have contributed to increased segregation related to pupils’ background, the provision of special support, and of attainment. This is a real dilemma for a system that has emphasised social inclusion and education for all, egalitarian views that are seen as a point of departure for the Swedish education system. Thus, Swedish education lives with a tension of two educational ideologies, an individualistic-market educational ideology and a collectivistic-egalitarian educational ideology. Of course, both ideologies are far from unidimensional and encompass several different values and concepts. Several studies conclude or assume that these ideologies – and the policies inspired by them – are contradictory and that market mechanisms will undermine inclusive ambitions. However, this may appear differently in different schools, as policies are interpreted and enacted rather than implemented. While there are examples of policy analyses regarding one or both of these ideologies, and studies regarding their contradictions and incompatibility, there have been few attempts to study empirically the interplay and consequences of their coexistence and enactment in schools. In particular, we know very little about ‘unexceptional’ or ‘ordinary’ schools and their enactment of policies.The project’s main objective is to develop a theoretical understanding of how these educational ideologies influence school’s work and organisation via policy and the enactment of policy. Using interviews with head teachers, the research questions are:How do head teachers address, define and reflect around the challenges of social inclusion and market oriented policies in their work and in their schools?To what extent do they believe pupils in general, and vulnerable pupils in particular are affected by market mechanisms in education? What are the challenges and/or benefits?  The theoretical point of departure is inspired by the work of Michael Apple, (2004), Thomas Popkewitz, (2008) and Stephen Ball (1993; Ball et al., 2012). Questions about what education should accomplish, how it is organised and who is to be educated are often implicit in political discourse. Here, educational ideologies are seen as rendering different answers to these questions and thus leading to different implications for educational practice and organisation. It is argued that these ideologies have different conceptualization of society, democracy and even the individual citizen. While public education may historically have collectivistic ideals, the market ideal views the citizen-in-the-making as a consumer rather than as a participant in the shaping of future society. The individual consumer of education is thus to be able to choose schooling according to his/her preferences. This can be opposed to viewing schooling as contributing to social cohesion and inclusion by accommodating a plurality of pupils.These ideologies in turn find their way to policies, i.e. products of compromises, agendas and influences of various actors at various stages. Often containing contradicting goals and ambitions, policies then have to be interpreted and enacted by schools in a meaningful manner that fulfils the will of regulating and governing agencies as well as appeals to their prospective clients, namely pupils and parents. Method  For the purposes of this study, head teachers of primary schools have been chosen as respondents. Being in a middle management position, head teachers in Sweden are held accountable for the both the educational and economic situation of their schools. They answer to their principal organiser (PO) regarding economics, whether the PO is a municipality or a private organisation. Simultaneously, they are also accountable for the day to day work, the attainment of the pupils and the organisational situation the teachers work within. Additionally, head teachers are legally responsible for the special educational services and the preventive work against bullying. Finally yet importantly, they are to promote their schools as they compete for pupils (and thus fiscal resources). It can thus be argued that if anyone would see the consequences of market mechanisms and the responsibility of maintaining or achieving social inclusion, it would be the head teachers.Twenty school leaders from both municipal and independent schools in three municipalities will be interviewed and asked to reflect upon marketization of education and dimensions of social inclusion. They are asked how these ideologies translate into their work, the organisation of their school, their staff, pupils and guardians of the pupils. In addition, documents and policies from each municipality and each school will be analysed.The selection of municipalities and respondents is strategic. The three municipalities chosen have had different political approaches as regards the acceptance of market influences and thus very different experiences of the introduction of school choice and competition between schools. Municipality A has been very positive towards choice and private actors, for instance, implementing a ‘purchaser-provider’ model in the school sector services for several years. Municipality B has on the other hand been restrictive and attempted to veto the introduction of privately run schools several times. The third municipality is markedly smaller than the other two, and had not had any independent schools up until quite recently. In order to enrich the material with different experiences and perspectives, respondents will be contacted from schools with varying pupil demographics, in areas with varying social situations, and from both publically run schools and independent schools. These semi-structured interviews will take approximately an hour each and will be recorded and transcribed for subsequent analysis, using qualitative content analysis. Other theoretical devices, such as profession theory and organisation theory, may become useful to interpret these results.Expected outcomes/results The interviews are to be conducted in the upcoming month. The expected results are assumed to shed light upon how these educational ideologies, namely the individualistic-market ideology and the collectivistic-egalitarian ideology, can influence day to day work in primary schools. A common assumption is that they are incompatible and contradictory, and this is expected to appear in the responses. However, some prior research has shown that they live side by side in practice. That is not to say that one does not influence or diminish the other, rather that schools find ways to balance the two, resolving dilemmas as they arise. Hopefully, the paper can render a more nuanced understanding of these educational ideologies, how the coexistence of them can appear in the local context, and how schools enact seemingly contradictory policies.Additionally, this research can contribute to an understanding of the role of head teachers as actors within the school system in general, and the individual schools in particular, especially as regards the consequences of marketization of the education system.Intent of publication  The results presented here are to be submitted to an international peer-reviewed journal shortly after presentation at the conference.   References  Andersson, E., B. Malmberg & Östh, J. (2012). Travel to school distances in Sweden 2000-2006: changing school geography with equality implications. Journal of Transport Geography, 23:34-45.Apple, M. W. (2004). Ideology and curriculum. New York, NY: Routledge.Ball, S. J. (1993). What is policy? Texts, trajectories and toolboxes. Discourse, 13(2): 10-17. Reprinted in Ball, S.J. (2006). (Ed.) Education Policy and Social Class. The selected works of Stephen J. Ball. New York: Routledge pp. 43-66Ball, S. J., Maguire, M. & Braun, A. (2012). How Schools do Policy. Policy Enactment in Secondary Schools. London, England: Routledge.Booth, T., Ainscow, M. & Dyson, A. (1997). Understanding Inclusion and exclusion in the English competitive education system. International Journal of Inclusive Education, 1(4), 337-355.Dyson, A. & Gallanaugh, F. (2007). National policy and the development of inclusive school practices: a case study. Cambridge Journal of Education, 37(4), 437-488 Englund, T. (1998a). Utbildning som “public good “ eller “private good”? In T. Englund (Ed.), Utbildningspolitiskt systemskifte?  (pp. 107-142). Stockholm: HLS förlag.Lubienski, C. (2009). Do Quasi-markets Foster Innovation in Education? A Comparative Perspective. OECD Education Working Papers No. 25, OECD Publishing.Lundahl, L., Erixon Arreman, I., Holm, A.-S. and Lundström, U. (2013). Educational marketization the Swedish way. Education Inquiry, 4(3): 497–517.Magnússon, G. (2015). Traditions and Challenges. Special Support in Swedish Independent Compulsory Schools. (Dissertation). Västerås: Mälardalen University.Popkewitz, T. (2008). Cosmopolitanism and the Age of School Reform. Science, Education, and Making Society by Making of the Child. New York, NY: Routledge.Rönnberg, L. (2015). Marketization on export: Representations of the Swedish free school model in English media. European Education Research Journal,
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168804.
  • Magnusson, Georg (författare)
  • Från tumstock till laser, mätteknisk utveckling
  • 1998
  • Ingår i: VTI:s och KFB:s forskardagar. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 89-101
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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168805.
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168806.
  • Magnússon, Gunnlaugur, 1979- (författare)
  • Parallell Paradigm shifts? : Developments of Market Ideals and Ideals of Inclusion in the Swedish Education System
  • 2016
  • Konferensbidrag (refereegranskat)abstract
    • Prior research indicates that the marketization of the Swedish education system has contributed to segregation, particularly between schools. Research on school choice, independent schools and special educational provision further strengthens this image which, in an education system previously seen as highly inclusive, must be seen as a disconcerting development. However, the interplay between the individualist discourse of market education and the more collective oriented discourse of inclusive education has not been studied to a high degree on a theoretical level. This article presents and compares developments within Swedish education as encompassing paradigm shifts taking place in international and national discourse on education. The first shift regards the shift from a state centred education system based upon collectivist ideals to a marketized education system based upon individualist ideals. The other shift regards a shift in how the need for special educational support was understood and defined leading to a move from a segregating special educational provision – where individuals were compensated for their deficits – to inclusive education as an ideal – encompassing different positions as regards participation in classrooms, curriculum and peer activities.Commonalities and differences between the two emerging paradigms are discussed as well as how they have affected each other. The article also relates these paradigms to political ideals and discourses about what education is and how it should be organised. As such, both shifts are seen as interventions for more democratic education, each departing from a different view of what democracy is and who is to be in focus for it. Conclusions are drawn about how different understandings of the concept of inclusion may be coloured by the hegemonic market paradigm's focus on the individual, leading to a different understandings of inclusion. This is thus a theoretical contribution to the discussion about inclusive education. As such it utilises theoretical tools from educational philosophy and democratic theory as well as theoretical works about special education and inclusive education, in particular Thomas Skrtic and Clark, Dyson and Millward. Although the focus is upon developments in the Swedish education system, the discussion and conclusions have relevance on an international level, particularly for the Nordic countries.
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168807.
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168808.
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168809.
  • Magnusson, Håkan, et al. (författare)
  • A compact dual-band power amplifier driver for 2.4GHz and 5.2GHz WLAN transmitters
  • 2007
  • Ingår i: Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium. - 9781424405305 ; , s. 83-86
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents a dual-band power amplifier (PA) driver with matched output operating in the 2.4 GHz and 5.2 GHz ISM bands. The use of tunable differential inductors both in the RF choke and the matching circuit saves significant die-area compared to traditional configurations of integrated PA drivers. The fabricated circuit size is as small as 0.48 mm 2 for the used 0.18 mu m CMOS process, saving about 0.5 mm(2) silicon area. Measurement results show that the circuit achieves 10.4 dB gain and a maximum output power of 13 dBm at 2.4 GHz while the gain is 5.1 dB and maximum output power is 8.7dBm at 5.2 GHz. The circuit dissipates 13mA from a 1.8V supple.
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168810.
  • Magnusson, Håkan, et al. (författare)
  • A cross-coupled dual-loop feedback power amplifier driver
  • 2005
  • Ingår i: Proceedings of the 2005 European Conference on Circuit Theory and Design. - 0780390660 - 9780780390669 ; , s. 309-312
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents a wide-band power amplifier (PA) driver with matched output. A dual-loop cross-coupled feedback is applied on a simple two stage core amplifier. The use of a dual-loop feedback provides a broad-band 50 Ω output match without the use of any area consuming matching networks. The PA driver exhibits a gain higher than 6.4 dB, more than +1.9dBm 1-dB compression point with S22 less than -22 dB at the output, while dissipating 42 mA from a 1.8V supply. The output IP3 is better than +13.9 dBm at 2.4 GHz.
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