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41.
  • Chu, H.S., et al. (författare)
  • VLBI observations of the puzzling BL Lacertae object 0235+164
  • 1996
  • Ingår i: Astronomy and Astrophysics. - Springer. - 0004-6361 .- 1432-0746. ; 307:1, s. 15-20
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>For over 20 years, many models have been proposed to explain the variability of AO0235+164. Among them, the most favorable has been micro-lensing. We have made a series of VLBI observations on this source in order to better understand its nature. The resultant maps indicate dramatic changes in the position angle of the jet between observations as well as a correlation between the intensity of the VLBI core and flux outbursts which occurred between the observing sessions. These characteristics, in conjunction with other arguments, suggest that the source variability is intrinsic, i.e. microlensing is of minor importance. We suggest two models: 1) a model in which the jet starts at a very small angle to the line of sight and then curves away to become about 6deg at about 1 mas from the core; and 2) a CME (Coronal Mass Ejection) model that also may explain the violent variability in intensity, polarization position angle, and jet direction in AO0235+164.</p>
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42.
  • Collin, Sven-Olof, et al. (författare)
  • Market Segmentation in Scientific Publications : Research Patterns in American vs European Management Journals
  • 1996
  • Ingår i: British Journal of Management. - Chichester : Wiley-Blackwell. - 1045-3172 .- 1467-8551. ; 7:2, s. 141-154
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Ideal science should conform to certain criteria or goals, among them the goals of universalism and commonality. Realization of these goals may be limited, however, through the dividing up of researchers in terms of geographical borders. In this study the general hypothesis is tested that there is a segmentation of the society of management researchers into a North American (US) and a European (E) segment, a segmentation which is furthered by differences in incentive schemes and in paradigms. Four leading management journals from North America and from Europe, respectively, and the 242 articles they contained published in 1993 were selected to represent the different geographical segments. The results provide: support for the existence of two such segments; support for differences in incentive schemes influencing the articles; support for their being paradigm differences between the two segments; and support for a paradigm effect being stronger in US-journals than in E-journals, US-authors are more willing, however, to conform to the E-paradigm than vice versa. We argue for methodological pragmatism in order to reduce the presumed counter-productive effects of paradigmatic rigidity.</p>
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43.
  • Cuesta, Marta, 1954- (författare)
  • Candomblé: : a Study on Afro-Brazilian Identity
  • 1998
  • Ingår i: Corriente del Golfo : Revista Noruega de Estudios Latinoamericanos. - Bergen. - 0804-7303. ; :3-4, s. 221-241
  • Tidskriftsartikel (refereegranskat)
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44.
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45.
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46.
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47.
  • Dimmler, Martin, et al. (författare)
  • On-line arithmetic for real-time control of microsystems
  • 1999
  • Ingår i: IEEE/ASME transactions on mechatronics. - Piscataway, NJ : IEEE Press. - 1083-4435 .- 1941-014X. ; 4:2, s. 213-217
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The integration of microcontrollers within mechanical systems is a current trend. However, decreasing the size of the system and satisfying higher precision requirements make it necessary to reevaluate the common signal processing techniques for controller implementations, because limited controller size, computation speed, and power consumption become major topics. In this paper, we demonstrate that serial computations with the most significant digits first, that is, on-line arithmetic, offer an important potential for real-time control. They enable a combination of traditional functions, such as analog-to-digital converters and control data computations. This leads to very efficient controller implementations with small size, high speed, and low power consumption. After a brief description of the requirements and challenges of microsystem controller design, the use of on-line arithmetic for real-time control is proposed. A short introduction to on-line arithmetic is given and control-specific implementation guidelines are presented and finally applied to a simple test system.</p>
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48.
  • Duc, Benoıt, et al. (författare)
  • Face authentication with Gabor information on deformable graphs
  • 1999
  • Ingår i: IEEE Transactions on Image Processing. - New York, NY : IEEE Press. - 1057-7149 .- 1941-0042. ; 8:4, s. 504-516
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Elastic graph matching has been proposed as a practical implementation of dynamic link matching, which is a neural network with dynamically evolving links between a reference model and an input image. Each node of the graph contains features that characterize the neighborhood of its location in the image. The elastic graph matching usually consists of two consecutive steps, namely a matching with a rigid grid, followed by a deformation of the grid, which is actually the elastic part. The deformation step is introduced in order to allow for some deformation, rotation, and scaling of the object to be matched. This method is applied here to the authentication of human faces where candidates claim an identity that is to be checked. The matching error as originally suggested is not powerful enough to provide satisfying results in this case. We introduce an automatic weighting of the nodes according to their significance. We also explore the significance of the elastic deformation for an application of face-based person authentication. We compare performance results obtained with and without the second matching step. Results show that the deformation step slightly increases the performance, but has lower influence than the weighting of the nodes. The best results are obtained with the combination of both aspects. The results provided by the proposed method compare favorably with two methods that require a prior geometric face normalization, namely the synergetic and eigenface approaches</p>
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49.
  • Eriksen, Lars Bo, et al. (författare)
  • In the path of the pioneers : longitudinal study of web news genre
  • 1999
  • Ingår i: Proceedings of the 22nd Information Systems Research Seminar in Scandinavia (IRIS 22) : "Enterprise Architectures for Virtual Organisations", Volume 1. - Jyväskylä : University of Jyväskylä. - 9513905128 - 9789513905125 ; s. 289-304
  • Konferensbidrag (refereegranskat)abstract
    • <p>Based on repetitive visits to three Scandinavian Newspaper organizations, this paper presents an analysis of the evolution of the web news genre from 96 to 99. Genre awareness is an explanation of how users and designers create and maintain web site awareness beyond the individual site. In the paper genre is elaborated in terms of content, form, rationale and work. From the data it is concluded that web news by 99 possess characteristics that makes it distinctive from print media and web news sites from 96. The immediacy of the web affords the provision of news in a continuous pattern similar to “live” reporting. Primary content of web news is hard news that affords users to visit news sites throughout the day to stay informed. In comparison to print media, the web genre has introduced composites to support the users in navigating and browsing the content of a news site. Internal resistance towards new media has been reduced from 96 to 99 as a consequence of increased competition in the web media.</p>
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50.
  • Eriksson, Jonnie, 1978-, et al. (författare)
  • Tarkovskijs "Stalker<em>"</em> : En analys
  • 1999
  • Rapport (övrigt vetenskapligt)abstract
    • <p>Arbetet bygger på ett projekt inom ämnet filmvetenskap vid Högskolan i Halmstad, Foto- och Filmhögskolan i Göteborg samt Göteborgs Universitet, i vilket studenter analyserat Andrej Tarkovskijs film <em>S</em><em>talker</em> (1972) utifrån en rad frågor. Svaren på dessa uppgifter har här legat till underlag för en självständig bearbetning som sammanfattar resultatet i formen av en analys av filmen ifråga utifrån sju aspekter: handlingens tematik, den dramaturgiska framställningsformen, bildspråkets former, gestaltningen av tid och av rum, skildringen av fiktionens karaktärer samt den människosyn som representeras. Den teoretiska tonvikten ligger vid Bakhtins och Deleuzes idéer om bilden av rum och tid inom konst; en särskild hänsyn tas till filosofiska och religiösa frågor inom filmen.</p>
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