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Sökning: förf:(johan bergman)

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  • Bergman, Johan, et al. (författare)
  • Continued HSPA Evolution of Mobile Broadband
  • 2009
  • Ingår i: Ericsson review (English ed.). - 0014-0171. ; 86:1, s. 7-11
  • Tidskriftsartikel (refereegranskat)abstract
    • The telecommunication industry is capitalizing on continuous evolution of the HSPA (high speed packet access) broadband technology, which is implemented in the form of 3GPP Release 7, 8, and 9. The novel solutions effectively meets the increased demands for higher data rates and greater cell capacity driven by the success of the mobile broadband. The HSPA 3GPP Release 7 supports the higher order modulation, multiple input, multiple output (MIMO) technology in the downlink, data rates of up to 28Mbps in the downlink, and 11.5 Mbps in the uplinks. The features of HSGPA 3GPP Release 8 include multicarrier operation, higher order modulation combined with MIMO, and enhancements to common states, and integrated mobile broadcast. The technology facilitates the existing WCDMA operators a cost-effective way of broadcasting data through 5MHz of unpaired spectrum. The ongoing works to standardization 3GPP Release 9 focuses on the support of features that further increases bit rates.
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  • Bergman, Johan, 1973- (författare)
  • Kulturfolk eller folkkultur? : 1968, kulturarbetarna och demokratin
  • 2010
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • Cultural folk or folk culture? 1968, cultural workers and democracy. In the early 1960’s it became clear that although Swedish citizens had experienced an overall increase in material well-being and political democracy, there were still severe shortages in terms of cultural democracy. The radicalisation of the 1960’s meant that students and leftist artists were to play an important part in attempts to rectify this — both as idea-bearers and policy-makers. Using the debates of cultural democracy as a starting point, this thesis focuses on how leftist radical “cultural workers” aimed at democratising culture during the 1960’s and the 1970’s. Demands were raised for a fundamental shift in focus from the context of cultural production (and, accordingly, the producers) to cultural consumption and the consumers. The study follows a cultural democratic tendency that expanded from established theatre institutions during the 1960’s over to the radical so-called “free” theatre groups, the progressive music movement and the textile collectives of the 1970’s. By comparing three organisations within the fields of theatre, music and textile respectively, both general and specific conditions and dilemmas that characterised these branches are analysed. The democratisation of culture during the 1970’s led to processes of professionalisation and politicisation. In these developments, authoritative criteria for what constituted “true” art were called upon. These measures can be understood both as a consequence of the actors’ ambition to reduce competition that resulted from producing culture on a market, but also as a way of gaining cultural status. Despite various revolutions within different cultural areas the agents agreed on one thing; the absolute right of an autonomous cultural field to exist. This meant that the battle of defining “true art” was about something real and precisely therefore a battle worth fighting.
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  • Bergman, Johan, et al. (författare)
  • Roll cutting at paper mills
  • 2002
  • Ingår i: Proceedings of the Control Systems 2002. ; , s. 159-163
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Roll cutting has attracted a great deal of research attention. However, most of the development of models and methods in academic research has not considered some key industrial requirements. These are practical production aspects that often create non-tractable optimization problems. In this paper, we study two important problems and show how these can be solved efficiently in an industrial setting. These are operative roll cutting where the number of reels and different patterns should be minimized and real-time cutting, when defects and quality restrictions on ordered rolls are included.
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