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  • 1.
    Aarnes, Rose-Marie
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Andersson, Malin
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Varför lyckas inte alla?: En studie på Hantverksprogrammet Frisör och Florist om skillnader mellan hög- och lågpresterande elever.2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Our purpose with this study was to investigate whether there was any difference between high and low performing students from selected aspects such as choice of studies, achievement, self-image, motivation, confidence and career choices.

    A training professional in today's schools requires knowledge of how young people think about their lives for us to help students develop both high-and low-performing students. Students have different conditions, but no matter good or bad conditions, each individual pupil must be allowed to develop.

    The concepts used in the study are of study, self-image, motivation, achievement in the future and career choices. In the background, describes these concepts through literature study. The method we have used was semi-structured interviews. Which means a fixed structure, but with room for follow-up questions.

    The results of our study indicate that there were clear differences between high-and low-performing students. The differences suggest that the high-performing students were more conscious about their study options than low-performing students. Differences were also in the students' views of themselves,where the high-performance had a lower self- image than the low-performing students had. High performance compared each other more often with other people and was more unsure of themselves, however, the motivation was significantly higher among the high-performance students, performance showed the same results. The high-performing students had a clearer vision of the future and that they had a clearer picture of their career choice than the low-performing students.

    Discussion on how we as educators can strengthen each student based on their individual needs have been based on results of the study.

  • 2.
    Abbas, Nadeem
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Towards autonomic software product lines2011In: SPLC '11 Proceedings of the 15th International Software Product Line Conference, Volume 2, ACM Press, 2011, p. 44:1-44:8Conference paper (Refereed)
    Abstract [en]

    We envision an Autonomic Software Product Line (ASPL). The ASPL is a dynamic software product line that supports self adaptable products. We plan to use reflective architecture to model and develop ASPL. To evaluate the approach, we have implemented three autonomic product lines which show promising results. The ASPL approach is at initial stages, and require additional work. We plan to exploit online learning to realize more dynamic software product lines to cope with the problem of product line evolution. We propose on-line knowledge sharing among products in a product line to achieve continuous improvement of quality in product line products.

  • 3.
    Abbas, Nadeem
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Andersson, Jesper
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Löwe, Welf
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Autonomic Software Product Lines (ASPL)2010In: ECSA '10 Proceedings of the Fourth European Conference on Software Architecture: Companion Volume / [ed] Carlos E. Cuesta, ACM Press, 2010, p. 324-331Conference paper (Refereed)
    Abstract [en]

    We describe ongoing work on a variability mechanism for Autonomic Software Product Lines (ASPL). The autonomic software product lines have self-management characteristics that make product line instances more resilient to context changes and some aspects of product line evolution. Instances sense the context, selects and bind the best component variants to variation-points at run-time. The variability mechanism we describe is composed of a profile guided dispatch based on off-line and on-line training processes. Together they form a simple, yet powerful variability mechanism that continuously learns, which variants to bind given the current context and system goals.

  • 4.
    Abbas, Nadeem
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Andersson, Jesper
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Löwe, Welf
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Towards Autonomic Software Product Lines (ASPL) - A Technical Report2011Report (Other academic)
    Abstract [en]

    This report describes a work in progress to develop Autonomic Software Product Lines (ASPL). The ASPL is a dynamic software product line approach with a novel variability handling mechanism that enables traditional software product lines to adapt themselves at runtime in response to changes in their context, requirements and business goals. The ASPL variability mechanism is composed of three key activities: 1) context-profiling, 2) context-aware composition, and 3) online learning. Context-profiling is an offline activity that prepares a knowledge base for context-aware composition. The context-aware composition uses the knowledge base to derive a new product or adapts an existing product based on a product line's context attributes and goals. The online learning optimizes the knowledge base to remove errors and suboptimal information and to incorporate new knowledge. The three activities together form a simple yet powerful variability handling mechanism that learns and adapts a system at runtime in response to changes in system context and goals. We evaluated the ASPL variability mechanism on three small-scale software product lines and got promising results. The ASPL approach is, however, is yet at an initial stage and require improved development support with more rigorous evaluation. 

  • 5.
    Abbas, Nadeem
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Andersson, Jesper
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Weyns, Danny
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Knowledge evolution in autonomic software product lines2011In: SPLC '11 Proceedings of the 15th International Software Product Line Conference, Volume 2, New York, NY, USA: ACM Press, 2011, p. 36:1-36:8Conference paper (Refereed)
    Abstract [en]

    We describe ongoing work in knowledge evolution management for autonomic software product lines. We explore how an autonomic product line may benefit from new knowledge originating from different source activities and artifacts at run time. The motivation for sharing run-time knowledge is that products may self-optimize at run time and thus improve quality faster compared to traditional software product line evolution. We propose two mechanisms that support knowledge evolution in product lines: online learning and knowledge sharing. We describe two basic scenarios for runtime knowledge evolution that involves these mechanisms. We evaluate online learning and knowledge sharing in a small product line setting that shows promising results.

  • 6.
    Abbas, Nadeem
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Andersson, Jesper
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Weyns, Danny
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Modeling Variability in Product Lines Using Domain Quality Attribute Scenarios2012In: Proceedings of the WICSA/ECSA 2012 Companion Volume, ACM Press, 2012, p. 135-142Conference paper (Refereed)
    Abstract [en]

    The concept of variability is fundamental in software product lines and a successful implementation of a product line largely depends on how well domain requirements and their variability are specified, managed, and realized. While developing an educational software product line, we identified a lack of support to specify variability in quality concerns. To address this problem we propose an approach to model variability in quality concerns, which is an extension of quality attribute scenarios. In particular, we propose domain quality attribute scenarios, which extend standard quality attribute scenarios with additional information to support specification of variability and deriving product specific scenarios. We demonstrate the approach with scenarios for robustness and upgradability requirements in the educational software product line.

  • 7. Abbasi, R.
    et al.
    Abdou, Y.
    Abu-Zayyad, T.
    Adams, J.
    Aguilar, J. A.
    Ahlers, M.
    Andeen, K.
    Auffenberg, J.
    Bai, X.
    Baker, M.
    Barwick, S. W.
    Bay, R.
    Alba, J. L. Bazo
    Beattie, K.
    Beatty, J. J.
    Bechet, S.
    Becker, J. K.
    Becker, K. -H
    Benabderrahmane, M. L.
    Berdermann, J.
    Berghaus, P.
    Berley, D.
    Bernardini, E.
    Bertrand, D.
    Besson, D. Z.
    Bissok, M.
    Blaufuss, E.
    Boersma, D. J.
    Bohm, C.
    Bolmont, J.
    Botner, O.
    Bradley, L.
    Braun, J.
    Breder, D.
    Carson, M.
    Castermans, T.
    Chirkin, D.
    Christy, B.
    Clem, J.
    Cohen, S.
    Cowen, D. F.
    D'Agostino, M. V.
    Danninger, M.
    Day, C. T.
    De Clercq, C.
    Demiroers, L.
    Depaepe, O.
    Descamps, F.
    Desiati, P.
    de Vries-Uiterweerd, G.
    DeYoung, T.
    Diaz-Velez, J. C.
    Dreyer, J.
    Dumm, J. P.
    Duvoort, M. R.
    Edwards, W. R.
    Ehrlich, R.
    Eisch, J.
    Ellsworth, R. W.
    Engdegard, O.
    Euler, S.
    Evenson, P. A.
    Fadiran, O.
    Fazely, A. R.
    Feusels, T.
    Filimonov, K.
    Finley, C.
    Foerster, M. M.
    Fox, B. D.
    Franckowiak, A.
    Franke, R.
    Gaisser, T. K.
    Gallagher, J.
    Ganugapati, R.
    Gerhardt, L.
    Gladstone, L.
    Goldschmidt, A.
    Goodman, J. A.
    Gozzini, R.
    Grant, D.
    Griesel, T.
    Gross, A.
    Grullon, S.
    Gunasingha, R. M.
    Gurtner, M.
    Ha, C.
    Hallgren, A.
    Halzen, F.
    Han, K.
    Hanson, K.
    Hasegawa, Y.
    Helbing, K.
    Herquet, P.
    Hickford, S.
    Hill, G. C.
    Hoffman, K. D.
    Homeier, A.
    Hoshina, K.
    Hubert, D.
    Huelsnitz, W.
    Huelss, J. -P
    Hulth, P. O.
    Hultqvist, K.
    Hussain, S.
    Imlay, R. L.
    Inaba, M.
    Ishihara, A.
    Jacobsen, J.
    Japaridze, G. S.
    Johansson, H.
    Joseph, J. M.
    Kampert, K. -H
    Kappes, A.
    Karg, T.
    Karle, A.
    Kelley, J. L.
    Kemming, N.
    Kenny, P.
    Kiryluk, J.
    Kislat, F.
    Klein, S. R.
    Knops, S.
    Kohnen, G.
    Kolanoski, H.
    Koepke, L.
    Koskinen, D. J.
    Kowalski, M.
    Kowarik, T.
    Krasberg, M.
    Krings, T.
    Kroll, G.
    Kuehn, K.
    Kuwabara, T.
    Labare, M.
    Lafebre, S.
    Laihem, K.
    Landsman, H.
    Lauer, R.
    Lehmann, R.
    Lennarz, D.
    Lucke, A.
    Lundberg, J.
    Luenemann, J.
    Madsen, J.
    Majumdar, P.
    Maruyama, R.
    Mase, K.
    Matis, H. S.
    McParland, C. P.
    Meagher, K.
    Merck, M.
    Meszaros, P.
    Meures, T.
    Middell, E.
    Milke, N.
    Miyamoto, H.
    Montaruli, T.
    Morse, R.
    Movit, S. M.
    Nahnhauer, R.
    Nam, J. W.
    Niessen, P.
    Nygren, D. R.
    Odrowski, S.
    Olivas, A.
    Olivo, M.
    Ono, M.
    Panknin, S.
    Patton, S.
    Paul, L.
    de los Heros, C. Perez
    Petrovic, J.
    Piegsa, A.
    Pieloth, D.
    Pohl, Arvid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Porrata, R.
    Potthoff, N.
    Price, P. B.
    Prikockis, M.
    Przybylski, G. T.
    Rawlins, K.
    Redl, P.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Rizzo, A.
    Rodrigues, J. P.
    Roth, P.
    Rothmaier, F.
    Rott, C.
    Roucelle, C.
    Rutledge, D.
    Ruzybayev, B.
    Ryckbosch, D.
    Sander, H. -G
    Sarkar, S.
    Schatto, K.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Schukraft, A.
    Schulz, O.
    Schunck, M.
    Seckel, D.
    Semburg, B.
    Seo, S. H.
    Sestayo, Y.
    Seunarine, S.
    Silvestri, A.
    Slipak, A.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Stephens, G.
    Stezelberger, T.
    Stokstad, R. G.
    Stoufer, M. C.
    Stoyanov, S.
    Strahler, E. A.
    Straszheim, T.
    Sulanke, K. -H
    Sullivan, G. W.
    Swillens, Q.
    Taboada, I.
    Tamburro, A.
    Tarasova, O.
    Tepe, A.
    Ter-Antonyan, S.
    Terranova, C.
    Tilav, S.
    Toale, P. A.
    Tooker, J.
    Tosi, D.
    Turcan, D.
    van Eijndhoven, N.
    Vandenbroucke, J.
    Van Overloop, A.
    van Santen, J.
    Voigt, B.
    Walck, C.
    Waldenmaier, T.
    Wallraff, M.
    Walter, M.
    Wendt, C.
    Westerhoff, S.
    Whitehorn, N.
    Wiebe, K.
    Wiebusch, C. H.
    Wiedemann, A.
    Wikstrom, G.
    Williams, D. R.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Xu, C.
    Xu, X. W.
    Yodh, G.
    Yoshida, S.
    Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector2010In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 81, no 5, p. Article ID: 057101-Article in journal (Refereed)
    Abstract [en]

    A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross sections for LKP masses in the range 250-3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.

  • 8. Abbasi, R.
    et al.
    Abdou, Y.
    Abu-Zayyad, T.
    Adams, J.
    Aguilar, J. A.
    Ahlers, M.
    Andeen, K.
    Auffenberg, J.
    Bai, X.
    Baker, M.
    Barwick, S. W.
    Bay, R.
    Alba, J. L. Bazo
    Beattie, K.
    Beatty, J. J.
    Bechet, S.
    Becker, J. K.
    Becker, K. -H
    Benabderrahmane, M. L.
    Berdermann, J.
    Berghaus, P.
    Berley, D.
    Bernardini, E.
    Bertrand, D.
    Besson, D. Z.
    Bissok, M.
    Blaufuss, E.
    Boersma, D. J.
    Bohm, C.
    Bolmont, J.
    Botner, O.
    Bradley, L.
    Braun, J.
    Breder, D.
    Castermans, T.
    Chirkin, D.
    Christy, B.
    Clem, J.
    Cohen, S.
    Cowen, D. F.
    D'Agostino, M. V.
    Danninger, M.
    Day, C. T.
    De Clercq, C.
    Demiroers, L.
    Depaepe, O.
    Descamps, F.
    Desiati, P.
    de Vries-Uiterweerd, G.
    DeYoung, T.
    Diaz-Velez, J. C.
    Dreyer, J.
    Dumm, J. P.
    Duvoort, M. R.
    Edwards, W. R.
    Ehrlich, R.
    Eisch, J.
    Ellsworth, R. W.
    Engdegard, O.
    Euler, S.
    Evenson, P. A.
    Fadiran, O.
    Fazely, A. R.
    Feusels, T.
    Filimonov, K.
    Finley, C.
    Foerster, M. M.
    Fox, B. D.
    Franckowiak, A.
    Franke, R.
    Gaisser, T. K.
    Gallagher, J.
    Ganugapati, R.
    Gerhardt, L.
    Gladstone, L.
    Goldschmidt, A.
    Goodman, J. A.
    Gozzini, R.
    Grant, D.
    Griesel, T.
    Gro, A.
    Grullon, S.
    Gunasingha, R. M.
    Gurtner, M.
    Ha, C.
    Hallgren, A.
    Halzen, F.
    Han, K.
    Hanson, K.
    Hasegawa, Y.
    Heise, J.
    Helbing, K.
    Herquet, P.
    Hickford, S.
    Hill, G. C.
    Hoffman, K. D.
    Hoshina, K.
    Hubert, D.
    Huelsnitz, W.
    Huelss, J. -P
    Hulth, P. O.
    Hultqvist, K.
    Hussain, S.
    Imlay, R. L.
    Inaba, M.
    Ishihara, A.
    Jacobsen, J.
    Japaridze, G. S.
    Johansson, H.
    Joseph, J. M.
    Kampert, K. -H
    Kappes, A.
    Karg, T.
    Karle, A.
    Kelley, J. L.
    Kenny, P.
    Kiryluk, J.
    Kislat, F.
    Klein, S. R.
    Knops, S.
    Kohnen, G.
    Kolanoski, H.
    Koepke, L.
    Kowalski, M.
    Kowarik, T.
    Krasberg, M.
    Kuehn, K.
    Kuwabara, T.
    Labare, M.
    Lafebre, S.
    Laihem, K.
    Landsman, H.
    Lauer, R.
    Lennarz, D.
    Lucke, A.
    Lundberg, J.
    Luenemann, J.
    Madsen, J.
    Majumdar, P.
    Maruyama, R.
    Mase, K.
    Matis, H. S.
    McParland, C. P.
    Meagher, K.
    Merck, M.
    Meszaros, P.
    Middell, E.
    Milke, N.
    Miyamoto, H.
    Mohr, A.
    Montaruli, T.
    Morse, R.
    Movit, S. M.
    Nahnhauer, R.
    Nam, J. W.
    Niessen, P.
    Nygren, D. R.
    Odrowski, S.
    Olivas, A.
    Olivo, M.
    Ono, M.
    Panknin, S.
    Patton, S.
    de los Heros, C. Perez
    Petrovic, J.
    Piegsa, A.
    Pieloth, D.
    Pohl, Arvid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Porrata, R.
    Potthoff, N.
    Price, P. B.
    Prikockis, M.
    Przybylski, G. T.
    Rawlins, K.
    Redl, P.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Rizzo, A.
    Rodrigues, J. P.
    Roth, P.
    Rothmaier, F.
    Rott, C.
    Roucelle, C.
    Rutledge, D.
    Ryckbosch, D.
    Sander, H. -G
    Sarkar, S.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Schukraft, A.
    Schulz, O.
    Schunck, M.
    Seckel, D.
    Semburg, B.
    Seo, S. H.
    Sestayo, Y.
    Seunarine, S.
    Silvestri, A.
    Slipak, A.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Stephens, G.
    Stezelberger, T.
    Stokstad, R. G.
    Stoufer, M. C.
    Stoyanov, S.
    Strahler, E. A.
    Straszheim, T.
    Sulanke, K. -H
    Sullivan, G. W.
    Swillens, Q.
    Taboada, I.
    Tamburro, A.
    Tarasova, O.
    Tepe, A.
    Ter-Antonyan, S.
    Terranova, C.
    Tilav, S.
    Toale, P. A.
    Tooker, J.
    Tosi, D.
    Turcan, D.
    van Eijndhoven, N.
    Vandenbroucke, J.
    Van Overloop, A.
    Voigt, B.
    Walck, C.
    Waldenmaier, T.
    Walter, M.
    Wendt, C.
    Westerhoff, S.
    Whitehorn, N.
    Wiebusch, C. H.
    Wiedemann, A.
    Wikstroem, G.
    Williams, D. R.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Xu, X. W.
    Yodh, G.
    Yoshida, S.
    SEARCH FOR MUON NEUTRINOS FROM GAMMA-RAY BURSTS WITH THE IceCube NEUTRINO TELESCOPE2010In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 710, no 1, p. 346-359Article in journal (Refereed)
    Abstract [en]

    We present the results of searches for high-energy muon neutrinos from 41 gamma-ray bursts (GRBs) in the northern sky with the IceCube detector in its 22 string configuration active in 2007/2008. The searches cover both the prompt and a possible precursor emission as well as a model-independent, wide time window of -1 hr to + 3 hr around each GRB. In contrast to previous searches with a large GRB population, we do not utilize a standard Waxman-Bahcall GRB flux for the prompt emission but calculate individual neutrino spectra for all 41 GRBs from the burst parameters measured by satellites. For all of the three time windows, the best estimate for the number of signal events is zero. Therefore, we place 90% CL upper limits on the fluence from the prompt phase of 3.7 x 10(-3) erg cm(-2) (72 TeV-6.5 PeV) and on the fluence from the precursor phase of 2.3 x 10(-3) erg cm(-2) (2.2-55 TeV), where the quoted energy ranges contain 90% of the expected signal events in the detector. The 90% CL upper limit for the wide time window is 2.7 x 10(-3) erg cm(-2) (3 TeV-2.8 PeV) assuming an E-2 flux.

  • 9. Abbasi, R.
    et al.
    Abdou, Y.
    Abu-Zayyad, T.
    Adams, J.
    Aguilar, J. A.
    Ahlers, M.
    Andeen, K.
    Auffenberg, J.
    Bai, X.
    Baker, M.
    Barwick, S. W.
    Bay, R.
    Alba, J. L. Bazo
    Beattie, K.
    Beatty, J. J.
    Bechet, S.
    Becker, J. K.
    Becker, K. -H
    Benabderrahmane, M. L.
    Berdermann, J.
    Berghaus, P.
    Berley, D.
    Bernardini, E.
    Bertrand, D.
    Besson, D. Z.
    Bissok, M.
    Blaufuss, E.
    Boersma, D. J.
    Bohm, C.
    Botner, O.
    Bradley, L.
    Braun, J.
    Buitink, S.
    Carson, M.
    Chirkin, D.
    Christy, B.
    Clem, J.
    Cohen, S.
    Colnard, C.
    Cowen, D. F.
    D'Agostino, M. V.
    Danninger, M.
    De Clercq, C.
    Demiroers, L.
    Depaepe, O.
    Descamps, F.
    Desiati, P.
    de Vries-Uiterweerd, G.
    DeYoung, T.
    Diaz-Velez, J. C.
    Dreyer, J.
    Dumm, J. P.
    Duvoort, M. R.
    Ehrlich, R.
    Eisch, J.
    Ellsworth, R. W.
    Engdegard, O.
    Euler, S.
    Evenson, P. A.
    Fadiran, O.
    Fazely, A. R.
    Feusels, T.
    Filimonov, K.
    Finley, C.
    Foerster, M. M.
    Fox, B. D.
    Franckowiak, A.
    Franke, R.
    Gaisser, T. K.
    Gallagher, J.
    Ganugapati, R.
    Geisler, M.
    Gerhardt, L.
    Gladstone, L.
    Goldschmidt, A.
    Goodman, J. A.
    Grant, D.
    Griesel, T.
    Gross, A.
    Grullon, S.
    Gunasingha, R. M.
    Gurtner, M.
    Ha, C.
    Hallgren, A.
    Halzen, F.
    Han, K.
    Hanson, K.
    Hasegawa, Y.
    Haugen, J.
    Helbing, K.
    Herquet, P.
    Hickford, S.
    Hill, G. C.
    Hoffman, K. D.
    Homeier, A.
    Hoshina, K.
    Hubert, D.
    Huelsnitz, W.
    Huelss, J. -P
    Hulth, P. O.
    Hultqvist, K.
    Hussain, S.
    Imlay, R. L.
    Inaba, M.
    Ishihara, A.
    Jacobsen, J.
    Japaridze, G. S.
    Johansson, H.
    Joseph, J. M.
    Kampert, K. -H
    Kappes, A.
    Karg, T.
    Karle, A.
    Kelley, J. L.
    Kemming, N.
    Kenny, P.
    Kiryluk, J.
    Kislat, F.
    Kitamura, N.
    Klein, S. R.
    Knops, S.
    Kohnen, G.
    Kolanoski, H.
    Koepke, L.
    Koskinen, D. J.
    Kowalski, M.
    Kowarik, T.
    Krasberg, M.
    Krings, T.
    Kroll, G.
    Kuehn, K.
    Kuwabara, T.
    Labare, M.
    Lafebre, S.
    Laihem, K.
    Landsman, H.
    Lauer, R.
    Laundrie, A.
    Lehmann, R.
    Lennarz, D.
    Luenemann, J.
    Madsen, J.
    Majumdar, P.
    Maruyama, R.
    Mase, K.
    Matis, H. S.
    Matusik, M.
    Meagher, K.
    Merck, M.
    Meszaros, P.
    Meures, T.
    Middell, E.
    Milke, N.
    Miyamoto, H.
    Montaruli, T.
    Morse, R.
    Movit, S. M.
    Nahnhauer, R.
    Nam, J. W.
    Naumann, U.
    Niessen, P.
    Nygren, D. R.
    Odrowski, S.
    Olivas, A.
    Olivo, M.
    Ono, M.
    Panknin, S.
    Paul, L.
    de los Heros, C. Perez
    Petrovic, J.
    Piegsa, A.
    Pieloth, D.
    Pohl, Arvid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Porrata, R.
    Posselt, J.
    Price, P. B.
    Prikockis, M.
    Przybylski, G. T.
    Rawlins, K.
    Redl, P.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Rizzo, A.
    Robl, P.
    Rodrigues, J. P.
    Roth, P.
    Rothmaier, F.
    Rott, C.
    Roucelle, C.
    Rutledge, D.
    Ruzybayev, B.
    Ryckbosch, D.
    Sander, H. -G
    Sandstrom, P.
    Sarkar, S.
    Schatto, K.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Schukraft, A.
    Schultes, A.
    Schulz, O.
    Schunck, M.
    Seckel, D.
    Semburg, B.
    Seo, S. H.
    Sestayo, Y.
    Seunarine, S.
    Silvestri, A.
    Slipak, A.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Stephens, G.
    Stezelberger, T.
    Stokstad, R. G.
    Stoyanov, S.
    Strahler, E. A.
    Straszheim, T.
    Sullivan, G. W.
    Swillens, Q.
    Taboada, I.
    Tamburro, A.
    Tarasova, O.
    Tepe, A.
    Ter-Antonyan, S.
    Terranova, C.
    Tilav, S.
    Toale, P. A.
    Tosi, D.
    Turcan, D.
    van Eijndhoven, N.
    Vandenbroucke, J.
    Van Overloop, A.
    van Santen, J.
    Voigt, B.
    Wahl, D.
    Walck, C.
    Waldenmaier, T.
    Wallraff, M.
    Walter, M.
    Wendt, C.
    Westerhoff, S.
    Whitehorn, N.
    Wiebe, K.
    Wiebusch, C. H.
    Wikstrom, G.
    Williams, D. R.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Xu, C.
    Xu, X. W.
    Yodh, G.
    Yoshida, S.
    Zarzhitsky, P.
    Calibration and characterization of the IceCube photomultiplier tube2010In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 618, no 1-3, p. 139-152Article in journal (Refereed)
    Abstract [en]

    Over 5000 PMTs are being deployed at the South Pole to compose the IceCube neutrino observatory. Many are placed deep in the ice to detect Cherenkov light emitted by the products of high-energy neutrino interactions, and others are frozen into tanks on the surface to detect particles from atmospheric cosmic ray showers. IceCube is using the 10-in. diameter R7081-02 made by Hamamatsu Photonics. This paper describes the laboratory characterization and calibration of these PMTs before deployment. PMTs were illuminated with pulses ranging from single photons to saturation level. Parameterizations are given for the single photoelectron charge spectrum and the saturation behavior. Time resolution, late pulses and afterpulses are characterized. Because the PMTs are relatively large, the cathode sensitivity uniformity was measured. The absolute photon detection efficiency was calibrated using Rayleigh-scattered photons from a nitrogen laser. Measured characteristics are discussed in the context of their relevance to IceCube event reconstruction and simulation efforts. (C) 2010 Elsevier B.V. All rights reserved.

  • 10. Abbasi, R.
    et al.
    Abdou, Y.
    Ackermann, M.
    Adams, J.
    Aguilar, J. A.
    Ahlers, M.
    Andeen, K.
    Auffenberg, J.
    Bai, X.
    Baker, M.
    Barwick, S. W.
    Bay, R.
    Alba, J. L. Bazo
    Beattie, K.
    Beatty, J. J.
    Bechet, S.
    Becker, J. K.
    Becker, K. -H
    Benabderrahmane, M. L.
    Berdermann, J.
    Berghaus, P.
    Berley, D.
    Bernardini, E.
    Bertrand, D.
    Besson, D. Z.
    Bissok, M.
    Blaufuss, E.
    Boersma, D. J.
    Bohm, C.
    Bolmont, J.
    Boeser, S.
    Botner, O.
    Bradley, L.
    Braun, J.
    Breder, D.
    Castermans, T.
    Chirkin, D.
    Christy, B.
    Clem, J.
    Cohen, S.
    Cowen, D. F.
    D'Agostino, M. V.
    Danninger, M.
    Day, C. T.
    De Clercq, C.
    Demiroers, L.
    Depaepe, O.
    Descamps, F.
    Desiati, P.
    de Vries-Uiterweerd, G.
    DeYoung, T.
    Diaz-Velez, J. C.
    Dreyer, J.
    Dumm, J. P.
    Duvoort, M. R.
    Edwards, W. R.
    Ehrlich, R.
    Eisch, J.
    Ellsworth, R. W.
    Engdegard, O.
    Euler, S.
    Evenson, P. A.
    Fadiran, O.
    Fazely, A. R.
    Feusels, T.
    Filimonov, K.
    Finley, C.
    Foerster, M. M.
    Fox, B. D.
    Franckowiak, A.
    Franke, R.
    Gaisser, T. K.
    Gallagher, J.
    Ganugapati, R.
    Gerhardt, L.
    Gladstone, L.
    Goldschmidt, A.
    Goodman, J. A.
    Gozzini, R.
    Grant, D.
    Griesel, T.
    Gross, A.
    Grullon, S.
    Gunasingha, R. M.
    Gurtner, M.
    Ha, C.
    Hallgren, A.
    Halzen, F.
    Han, K.
    Hanson, K.
    Hasegawa, Y.
    Heise, J.
    Helbing, K.
    Herquet, P.
    Hickford, S.
    Hill, G. C.
    Hoffman, K. D.
    Hoshina, K.
    Hubert, D.
    Huelsnitz, W.
    Huelss, J. -P
    Hulth, P. O.
    Hultqvist, K.
    Hussain, S.
    Imlay, R. L.
    Inaba, M.
    Ishihara, A.
    Jacobsen, J.
    Japaridze, G. S.
    Johansson, H.
    Joseph, J. M.
    Kampert, K. -H
    Kappes, A.
    Karg, T.
    Karle, A.
    Kelley, J. L.
    Kenny, P.
    Kiryluk, J.
    Kislat, F.
    Klein, S. R.
    Klepser, S.
    Knops, S.
    Kohnen, G.
    Kolanoski, H.
    Koepke, L.
    Kowalski, M.
    Kowarik, T.
    Krasberg, M.
    Kuehn, K.
    Kuwabara, T.
    Labare, M.
    Lafebre, S.
    Laihem, K.
    Landsman, H.
    Lauer, R.
    Leich, H.
    Lennarz, D.
    Lucke, A.
    Lundberg, J.
    Luenemann, J.
    Madsen, J.
    Majumdar, P.
    Maruyama, R.
    Mase, K.
    Matis, H. S.
    McParland, C. P.
    Meagher, K.
    Merck, M.
    Meszaros, P.
    Middell, E.
    Milke, N.
    Miyamoto, H.
    Mohr, A.
    Montaruli, T.
    Morse, R.
    Movit, S. M.
    Muenich, K.
    Nahnhauer, R.
    Nam, J. W.
    Niessen, P.
    Nygren, D. R.
    Odrowski, S.
    Olivas, A.
    Olivo, M.
    Ono, M.
    Panknin, S.
    Patton, S.
    de los Heros, C. Perez
    Petrovic, J.
    Piegsa, A.
    Pieloth, D.
    Pohl, Arvid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Porrata, R.
    Potthoff, N.
    Price, P. B.
    Prikockis, M.
    Przybylski, G. T.
    Rawlins, K.
    Redl, P.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Rizzo, A.
    Rodrigues, J. P.
    Roth, P.
    Rothmaier, F.
    Rott, C.
    Roucelle, C.
    Rutledge, D.
    Ryckbosch, D.
    Sander, H. -G
    Sarkar, S.
    Satalecka, K.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Schukraft, A.
    Schulz, O.
    Schunck, M.
    Seckel, D.
    Semburg, B.
    Seo, S. H.
    Sestayo, Y.
    Seunarine, S.
    Silvestri, A.
    Slipak, A.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Stephens, G.
    Stezelberger, T.
    Stokstad, R. G.
    Stoufer, M. C.
    Stoyanov, S.
    Strahler, E. A.
    Straszheim, T.
    Sulanke, K. -H
    Sullivan, G. W.
    Swillens, Q.
    Taboada, I.
    Tarasova, O.
    Tepe, A.
    Ter-Antonyan, S.
    Terranova, C.
    Tilav, S.
    Tluczykont, M.
    Toale, P. A.
    Tosi, D.
    Turcan, D.
    van Eijndhoven, N.
    Vandenbroucke, J.
    Van Overloop, A.
    Vogt, C.
    Voigt, B.
    Walck, C.
    Waldenmaier, T.
    Walter, M.
    Wendt, C.
    Westerhoff, S.
    Whitehorn, N.
    Wiebusch, C. H.
    Wiedemann, A.
    Wikstrom, G.
    Williams, D. R.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Xu, X. W.
    Yodh, G.
    Yoshida, S.
    Measurement of sound speed vs. depth in South Pole ice for neutrino astronomy2010In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 33, no 5-6, p. 277-286Article in journal (Refereed)
    Abstract [en]

    We have measured the speed of both pressure waves and shear waves as a function of depth between 80 and 500 m depth in South Pole ice with better than 1% precision. The measurements were made using the South Pole Acoustic Test Setup (SPATS), an array of transmitters and sensors deployed in the ice at the South Pole in order to measure the acoustic properties relevant to acoustic detection of astrophysical neutrinos. The transmitters and sensors use piezoceramics operating at similar to 5-25 kHz. Between 200 m and 500 m depth, the measured profile is consistent with zero variation of the sound speed with depth, resulting in zero refraction, for both pressure and shear waves. We also performed a complementary study featuring an explosive signal propagating vertically from 50 to 2250 m depth, from which we determined a value for the pressure wave speed consistent with that determined for shallower depths, higher frequencies, and horizontal propagation with the SPATS sensors. The sound speed profile presented here can be used to achieve good acoustic source position and emission time reconstruction in general, and neutrino direction and energy reconstruction in particular. The reconstructed quantities could also help separate neutrino signals from background. (C) 2010 Elsevier B.V. All rights reserved.

  • 11.
    Abdulhusen, Maria
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Binokulärseende hos elitidrottare: En studie om djupseende, ackommodationsfacilitet och vergensfacilitet2011Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [sv]

    Syfte: Syftet med denna studie var att ta reda på om elitidrottare som spelar en bollsport har bättre djupseende, bättre förmåga att kunna ändra fokus mellan olika avstånd och mer uthålliga ögonmuskler än personer som inte spelar någon bollsport alls.

    Metod: Mätningarna utfördes på femton innebandyspelare som spelar på elitnivå och femton personer som inte spelar någon bollsport. Medelåldern var 22 år i båda grupperna. Först fick varje försöksperson svara på en enkät, sedan mättes visus upp monokulärt och binokulärt på 3 m med en logMAR visustavla. Efter det mättes djupseendet med Randot stereotest på 40 cm och sedan mättes försökspersonens förmåga att kunna ändra fokus mellan olika avstånd. Detta gjordes på 40 cm med en flipper med styrkorna ±2,00D. Sista mätningen var att få ett mått på hur uthålliga försökspersonens ögonmuskler var, detta gjordes på 40 cm med en flipper av styrkorna 3Δ Bas In/ 12Δ Bas Ut.

    Resultat: Medelvärdet på djupseendet i respektive grupp visade ingen statistisk signifikant skillnad mellan de båda grupperna (p=0,70). Det fanns en signifikant skillnad på medelvärdet mellan de båda grupperna när det gäller förmågan att kunna ändra fokus mellan olika avstånd (p=0,02). Medelvärdet på uthålligheten av ögonmusklerna visade ingen signifikant skillnad mellan de båda grupperna (p=0,08).

    Slutsats: Studien visade att innebandyspelare på elitnivå har bättre förmåga att ändra fokus mellan olika avstånd. Studien visade även att innebandypelare på elitnivå inte har mer uthålliga ögonmuskler eller bättre djupseende än de som inte spelar någon bollsport alls.

  • 12.
    Abghoui, Younes
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Computational design, synthesis, and characterization of oseltamivir molecularly imprinted polymers2012Independent thesis Advanced level (degree of Master (Two Years)), 40 credits / 60 HE creditsStudent thesis
  • 13.
    Aboubi, Fadoua
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    A cost effective and environmentally friendly stormwater treatment method: The use of wood fly ash and H2O22011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This current study is a lab-scale investigation focused on the treatment of stormwater runoff generated in wood-storage areas. The main target constituents of the proposed treatment were: metals (Cu, Cd, Co, V, Pb, Zn, Ni, Cr, Fe, As), COD, TOC, Phenols, and color. The method implemented for this project follows the main concept of using low-cost and environmentally friendly technologies and had as main steps the use of a by-product of wood-based industries - wood fly ashes as sorbents - followed by oxidation with H2O2 (Hydrogen Peroxide). The results obtained during this investigation were vey promising since satisfactory removal % was achieved. Removal rates of 98.5%, 86%, 89.6%, 79.6% were achieved for color, chemical oxygen demand (COD), total organic carbon (TOC) and phenols respectively. Furthermore a decrease in metals concentrations was also observed with the exception of chromium. The study showed that for 300 ml storm water, optimum conditions were with 7g wood fly ash, 5 hours time reaction, pH≈11.46 and 150 μl of a 30% H2O2 solution in a room temperature. To conclude it can be stated that the use of a by-product from wood industry to treat contaminated water from the same sector, following the concept of a closed-loop system, is promising and possible. However further studies need to be conducted in order to evaluate such system in scaled-up conditions.

  • 14.
    Abrahamsson, Jimmy
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Nätverksoptimering: Bästa möjliga tillgänglighet till lägsta möjliga länkkostnad2012Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats behandlar nätverksoptimering, med fokus på att få fram den bästa möjliga tillgängligheten till lägsta möjliga kostnad, i form av länkar. I studien tas en teoretiskt grundad hypotes om en metod fram för att lösa detta problemet. Samt genomförs ett test där metoden appliceras på ett studieobjekt för att bekräfta huruvida metoden verkar fungerar eller inte.

    Resultatet blir slutligen en metod som genom att analysera tillgängligheten, länk redundansen samt beräkna antal oberoende vägar mellan noder i ett nätverk. Kan genom att jämföra resultat från före en förändring med resultat från efter en förändring lyfta fram de förändringar som medför förbättringar. Varpå ett nätverk kan optimeras till bästa möjliga tillgänglighet till lägsta möjliga kostnad, i form av länkar.

  • 15.
    Abrahamsson, Micael
    et al.
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    Tybring, Johnas
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    Underhållssystem, Tillgänglighet och Felrapportering: En sammanställning och undersökning av felrapporteringar på Första Amfibieregementets Stridsbåt 90 system2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis has analysed incident and maintenance reports concerning the FirstMarine Regiment’s combat boat maintenance system. The aim was to find thosepossible deficiencies and shortcomings causing reduced accessibility. In addition, thethesis includes an analysis of maintenance-related statistics reported in 2008. Byusing these reports and statistical data as our factual base, we have examined thoseparts of the maintenance system and its components most frequently affected bydeficiencies and shortcomings. The thesis presents the most likely reasons for thesenegative occurrences, but also recommendations regarding measures that willincrease the overall accessibility.During our research, however, it also became evident that the main and most likelyreason for the reduced accessibility was the inherent capacity of the maintenancesystem (DIUS) used by the Royal Swedish Navy. In conclusion, this system is notsufficiently adapted to the great number of naval units and personnel who are usingit. Further, the naval personnel operating the system sometimes lack adequatetraining.

  • 16.
    Abrahamsson, Victor
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Development of a fluorometric method for the quantification of sulfite and thiol-containing compounds in beer2011Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Sulfite is the most important antioxidant in beer. Quantification of sulfite is crucial due to restrictions as an additive and for investigative purposes of sulfite and thiol-containing proteins role as redox mediators. A method based on fluorometric determination of sulfite and thiol-containing compounds in beer was developed. The analytes were derivatized with ThioGlo®  1 and subsequently separated on a C18 column with wide pore size, featuring a high-performance liquid chromatography system equipped with fluorescence detector. Two peaks corresponding to sulfite derivatives were observed. The two derivatives were assessed with exact mass spectrometry and both provided identical mass spectra. To compensate for adverse matrix effects in samples a matrix-matched calibration curve is proposed. Sulfite diminished in an inverse exponential manner upon hydrogen peroxide addition in beer. The amount of thiol groups decreased when beer was subjected to oxidative stress, thus confirming its antioxidative role in beer.

  • 17.
    Abrahamsson, Victor
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Hoff, Signe
    University of Copenhagen, Denmark.
    Nielsen, Nikoline J.
    University of Copenhagen, Denmark.
    Lund, Marianne N.
    University of Copenhagen, Denmark.
    Andersen, Mogens L.
    University of Copenhagen, Denmark.
    Determination of Sulfite in Beer Based on Fluorescent Derivatives and Liquid Chromatographic Separation2012In: Journal of the American Society of Brewing Chemists, ISSN 0361-0470, E-ISSN 1943-7854, Vol. 70, no 4, p. 296-302Article in journal (Refereed)
    Abstract [en]

    A method was developed for quantification of sulfite in beer based on derivatization with the maleimide-derived probe ThioGlo I followed by separation of fluorescent adducts by reversed-phase high-performance liquid chromatography and fluorescence detection. Sulfite gave two ThioGlo 1 derivatives and it was shown by mass spectrometry that both had identical mass spectra. Matrix effects were observed when constructing sulfite standard curves in different beers and, therefore, use of a matrix-matched calibration curve is proposed. ThioGlo I was found to generate fluorescent adducts with both bound and free sulfite, providing a quantification of the total sulfite content in beer. The limit of quantification of sulfite was 0.6 mg/L and the method can be used for quantification of sulfite in highly colored beers.

  • 18.
    Acharya, Om Nath
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Upadhyaya, Sabin
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Space Time Coding For Wireless Communication2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As the demand of high data rate is increasing, a lot of research is being conducted in the field of wireless communication. A well-known channel coding technique called Space-Time Coding has been implemented in the wireless Communication systems using multiple antennas to ensure the high speed communication as well as reliability by exploiting limited spectrum and maintaining the power. In this thesis, Space-Time Coding is discussed along with other related topics with special focus on Alamouti Space-Time Block Code. The Alamouti Codes show good performance in terms of bit error rate over Rayleigh fading channel. The performance of Altamonte’s code and MIMO capacity is evaluated by using MATLAB simulation.

  • 19.
    Achek, Jennie
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Geometri: Hur lärare undervisar i geometri i de tidigare skolåren2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A number of both international and national enquires shows that Swedish pupils are getting worse results in mathematics. One area that’s frequently pointed out is geometry. This enquiry intends to find out how the subject of geometry has developed in the Swedish school and witch methods and concepts teachers who teach in preschool and the early school years grade use in their teaching. This enquiry is based upon eight semi structured interviews and from studying previous curriculums. The result shows that teachers use a great deal of concepts and methods in their teaching but that there are a need for further education among teachers. The enquiry also shows that the significance of the subject has changed over time.

  • 20.
    Adbo, Karina
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Relationships between models used for teaching chemistry and those expressed by students2012Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis is focused upon chemistry as a school subject and students' interpretations and use of formally introduced teaching models. To explore students' developing repertoire of chemical models, a longitudinal interview study was undertaken spanning the first year of upper secondary school chemistry. Matter in its different states was selected as the target framework for this study. The results presented are derived from both generalisations of groups of students as well as a case study describing an individual learner's interpretation of formal content. The results obtained demonstrated that the formal teaching models provided to the students included in this study were not sufficient to afford them a coherent framework of matter in its different states or for chemical bonding. Instead, students' expressed models of matter and phase change were to a high degree dependent on electron movement (Paper I), anthropomorphism (Paper II) and, for one student, a mechanistic approach based on small particles and gravitation (Paper III). The results from this study place focus on the importance of learners' prior learning (previous experiences) and the need to develop a coherent framework of formal teaching models for the nature of matter and phase change.

  • 21.
    Adbo, Karina
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Taber, Keith
    Developing a way to view chemistry: a case study of one Swedish student’s rich conceptualisations to make sense of upper high school chemistryManuscript (preprint) (Other academic)
  • 22.
    Adenier, Guillaume
    et al.
    Tokyo University of Science, Japan.
    Khrennikov, Andrei
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Watabanabe, Noboru
    Tokyo University of Science, Japan.
    A Fair sampling test for Ekert protocol2011In: Quantum Bio-inforamtics IV: From Quantum Information to BioInformatics / [ed] Luigi Accardi, Wolfgang Freudenberg, Masanori Ohya, World Scientific, 2011, p. 403-412Chapter in book (Refereed)
  • 23.
    Adenier, Guillaume
    et al.
    Oslo University.
    Ohya, Masanori
    Tokyo University of Science.
    Watanabe, Noboru
    Tokyo University of Science.
    Basieva, Irina
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Khrennikov, Andrei
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Double Blinding-Attack on Entanglement-Based Quantum Key Distribution Protocols2012In: AIP Conference Proceedings, ISSN 0094-243X, E-ISSN 1551-7616, Vol. 1424, no 1, p. 9-16Article in journal (Refereed)
    Abstract [en]

    We propose a double blinding-attack on entangled-based quantum key distribution protocols. The principle of the attack is the same as in existing blinding attack except that instead of blinding the detectors on one side only, Eve is blinding the detectors of both Alice and Bob. In the BBM92 protocol, the attack allows Eve to get a full knowledge of the key and remain undetected even if Alice and Bob are using 100% efficient detectors. The attack can be easily extended to Ekert protocol, with an efficiency as high as 85.3%.

  • 24.
    Adolfsson, Helena
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Köper du något av en försäljare som du inte tycker om: En studie kring vad gymnasielärare anser vara fungerande relationer och hur dessa skapas2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det här arbetet var ett försök att konkretisera vad gymnasielärare anser vara fungerande relationer och på vilket sätt de upplever att de skapar dessa. Undersökningen är en kvalitativ intervjustudie med fyra gymnasielärare. I resultatet framkommer lärarnas syn på kännetecken för en fungerande relation samt hur de uppfattar att de skapar fungerande relationer.

  • 25.
    Adriansson, Eva
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Kommunal verksamhetsprocess efter införandet av en e-tjänst: Informationsflöde och informationshantering sett ur ett Lean-perspektiv2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Trots de svenska medborgarnas ökande krav på digital självservice via e-tjänster, går införande trögt hos kommunerna. En anledning är den relativt låga kunskap som finns i området. Främst vad gäller avancerade e-tjänster som förutom att öka medborgarnas tillgänglighet, insyn och delaktighet i sina offentliga ärenden, även ska minska den administrativa hanteringen för att istället låta mer av resurserna gå till kärnverksamheten. I den här kvalitativa fallstudien studerades hur en kommunal verksamhetsprocess utvecklas vid införandet av en e-tjänst. Hur slöseri kan identifieras i processen informationshantering och informationsflöde och hur dessa förändrats efter att e-tjänsten införts. Resultatet baserades på material från intervjuer och analyserades utifrån Leans kategorier av slöseri och teorin om Microsystem. Resultatet visade att slöseri som uppstår i informationshantering och informationsflöde mellan enheter eller microsystem kunde identifieras om alla microsystem kartlägger processen tillsammans. Mycket slöseri hade tagits bort i utvecklingsarbetet och lett till en smidigare och troligtvis mer effektiv process. Ett antagande men som även bekräftades av personalens upplevelser från testförsöken. Processutvecklingen tillsammans med e-tjänsten har säkerställt delar av processflödet där antalet informationsöverföringar blivit färre och på så sätt troligtvis även minskat risken för att missförstånd och felhantering ska uppstå av informationshanteringen.

  • 26.
    Afridi, Muhammad Zeeshan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Umer, Muhammad
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Razi, Daniyal
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Design and simulation of beam steering for 1D and 2D phased antenna arrays using ADS.2012Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    Phased arrays eliminate the problems of mechanical steering by using fast and reliable electronic components for steering the main beam. Modeling and simulation of beam steering for 1D and 2D arrays is the aspect that is considered in this thesis. A 1D array with 4 elements and a 2D array with 16 elements are studied in the X-band (8-12 GHz). The RF front-end of a phased array radar is modeled by means of ADS Momentum (Advanced design system).

  • 27.
    Aganovic, Deni
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Åhrberg, Cecilia
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Att fånga en oskuld: En undersökning kring ungdomars intresse för ekonomisk information online2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Att vid 18 års ålder tvingas ansvara för sina handlingar är för många ett stort steg, inte minst då en del av ansvaret är ekonomi. Ungdomarna vänder sig ofta till föräldrarna med frågor, men var ska de vända sig när föräldrarna inte har svaret? Bankerna har börjat söka sig lägre ner i åldrarna med sin marknadsföring för att fånga kunden innan denne blir myndig, men fortfarande är det många frågetecken kring informationen ungdomarna behöver.

    Uppdraget var att undersöka vad ungdomar behöver för information i en webbplats riktad mot ungdomar från banken. En undersökning genomfördes med en enkätundersökning med 100respondenter och tre olika fokusgrupper som genererade att ungdomarna känner att banker är alldeles för avlägsna. En minskad distans skulle medföra att ungdomarna lättare vänder sig till banken vid frågor kring sin ekonomi vilket i sin tur medför att deras intresse kring privatekonomiska frågor ökar.

    Designförslaget som presenteras fokuserar mycket på en funktion med textbaserad personlig service med co-browsingfunktioner som tillåter en bankman guida den unga kunden genom webbplatsen. Strävan är att ungdomarna ska känna en samhörighet till banken och lättare kan få alla typer av frågor besvarade då de var osäkra på vilken information de behöver. Om man inför en sådan tjänst bör användbarhetstest och utvärderingar på designförslaget genomföras för att kontrollera om distansen mellan bank och ungdom minskar.

  • 28.
    Ahlberg, Sandra
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Elevers möjlighet att utveckla matematiska förmågor utifrån läromedlet Pixel2012Student paper other, 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med arbetet är att ta reda på i vilken utsträckning elever ges förutsättningar att utveckla de olika förmågor som beskrivs i kursplanen för ämnet matematik, LGR11, när undervisningen bygger på ett vanligt förekommande läromedel, Pixel. Metoden är kvalitativ och det har skett en textanalys på geometriavsnitten i läromedlet. De förmågor som eleverna når upp till är att använda sig av olika matematiska begrepp, samt att formulera och lösa problem. Eleverna har goda möjligheter att själva kunna välja olika sätt att lösa uppgifter. De får även kunskap att förstå och använda olika uttrycksformer. Eleverna uppmuntras inte med hjälp av detta läromedel, att föra egna matematiska diskussioner. 

  • 29.
    Ahlgren, Tobias
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Eliassi, Jalal
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Värmeförluster vid utvändigt placerade ventilationssystem2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    To be able to handle tomorrows need for limited energy consumption we need to reduce our use of energy. The building sector stands for around 40 % of all energy consumption in the society. The government has put up a goal to reduce the energy consumption in our buildings with 20 % by year 2020 and 50 % by year 2050 compared with year 1995. To be able to do reach that goal we need a more energy efficient building stock.

    The main part of the energy used in our buildings is used for space heating. By installing ventilation systems with heat recovery on the exhaust air it is possible to use the heat-energy in the exhaust air to warm up the incoming air. This can contribute to a reduction in energy use.

    A ventilation system with heat recovery on the exhaust air is space demanding and there can be problems with finding enough space to do the installation indoors. Therefore it can be an advantage to place the aggregate and the ducts on the outside of the buildings climate shell. A placement exterior of the buildings climate shell or in an unheated space leads to thermal heat losses.

    The aim with this essay is to investigate how significant the heat losses are on exterior placed ventilation systems. The investigation has been done with help of theoretical calculations and measurements of the temperature difference in the ventilation ducts. Analysis has been made on life cycle costs on how to reduce the heat losses in an economic manner. To buildings, Höstvägen 14 and 22 in Växjö, which have been equipped with exterior placed ventilation systems have been studied. The two buildings have two different types of installation of the ducts.

    Our result shows that the heat losses through the ventilation systems on Höstvägen 14 and 22 are significant. The majority of the losses occur in the ducts. In the aggregate the thermal bridges in the framework accounts for the larger part.

  • 30.
    Ahlin, Klara
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Identifiering och visualisering av aktuella ämnen och sociala relationer i ett mikrobloggnätverk.: Riksdagspartiernas twitteranvändning inför riksdagsvalet 20102010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Att enskilda politiker och partier väljer att använda sig av sociala medier i valsammanhang blir allt vanligare. I denna uppsats granskades de svenska riksdagspartiernas twitteranvändning inför det svenska riksdagsvalet 2010. Genom en social- och innehållsmässig analys kring twitteranvändandet kunde enskilda partiers kommunikationsmönster anas. Den sociala analysen baserades på relationen mellan en användares följare och följande, den innehållsmässiga på de taggar nätverkets mikroblogginlägg märkts med.

    Bland annat identifierades två partier med en ren tvåvägskommunikation, och ett parti med en klar envägskommunikation. Två av de undersökta partierna hade även tendenser till att rikta sin kommunikation mot en inre grupp av politiska twittrare. Den innehållsmässiga analysen pekade även på att de olika partiernas nätverk till viss del har en liknande sammansättning, politikerna hade en tendens att följa varandra och partispecifika taggar dök upp i samtliga av de analyserade partiernas nätverk. Datan använd i analysen hämtades med hjälp av en utvecklad prototyp.

  • 31.
    Ahmad, Muhammad
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Jhanzeb, Jhanzeb
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Modeling and Simulation of an Electrostatic Precipitator Including a Comsol Multiphysics Guide for Modeling an ESP2011Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Gaseous exhaust of different industries contains dust particles of different chemical precipitates that are harmful for the environment. Electrostatic Precipitators are very often used in industries to filter their gaseous exhaust and to prevent the atmosphere to being polluted. Electrostatic Precipitators are very efficient in their work. Electrostatic Precipitators use the force of the electric field to separate the dust particles from gaseous exhaust. Electrostatic Precipitators charge the dust particles and remove these particles by attracting these charged dust particles toward the collecting plates. The charging of dust particles requires a charging zone. When gas passes through that charging zone, the dust particles in the gas stream become charged and then these charged particles are attracted toward the collecting plates. The design of an Electrostatic Precipitators requires the knowledge of its working principle and the problems that often arise during its working. This thesis is the study of the working and the problems of the Electrostatic Precipitators. The main reason for problems in working of an Electrostatic Precipitator is the dust resistivity. This dust resistivity affects the collection performance of an Electrostatic Precipitator. This thesis also contains the simulation of an Electrostatic Precipitator. In the simulation part, the Electric Potential and the Electric Field of an ESP is modeled in an ideal condition, when no gas is flowing through the ESP. The industrial software Comsol Multiphysics is used for the simulation. A Comsol Multiphysics guide is given in appendix of this thesis report that provides information about using this software.

     

  • 32.
    Ahmad, Qadeer
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    CUBIC CONGRUENCE EQUATIONS2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Let Nm(f(x)) denote the number of solutions of the congruence equation f(x)≡0 (modm), where m≥2 is any composite integer and f(x) is a cubic polynomial. In this thesis, we use different theorems and corollaries to find a number of solutions of the congruence equations without solving then we also construct the general expression of corresponding congruence equations to demonstrate the solutions of the equations. In this thesis, we use Mathematica software as a tool.

  • 33.
    Ahmed, Naveed
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Ahmed, Waqas
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Classification of perfect codes and minimal distances in the Lee metric2010Independent thesis Advanced level (degree of Master (Two Years)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Perfect codes and minimal distance of a code have great importance in the study of theoryof codes. The perfect codes are classified generally and in particular for the Lee metric.However, there are very few perfect codes in the Lee metric. The Lee metric hasnice properties because of its definition over the ring of integers residue modulo q. It isconjectured that there are no perfect codes in this metric for q > 3, where q is a primenumber.The minimal distance comes into play when it comes to detection and correction oferror patterns in a code. A few bounds on the number of codewords and minimal distanceof a code are discussed. Some examples for the codes are constructed and their minimaldistance is calculated. The bounds are illustrated with the help of the results obtained.

  • 34.
    Ahmed, Naveed
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Ahmed, Waqas
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Local orthogonal mappings and operator formulation for varying cross-sectional ducts.2010Independent thesis Advanced level (degree of Master (Two Years)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    A method is developed for solving the two dimensional Helmholtz equation in a ductwith varying cross-section region bounded by a curved top and flat bottom, having oneregion inside. To compute the propagation of sound waves in a curved duct with a curvedinternal interface is difficult problem. One method is to transform the wave equation intoa solvable form and making the curved interface plane. To this end a local orthogonaltransformation is developed for the varying cross-sectional duct having one medium inside.This transformation is first used to make the curved top of the waveguide flat andto transform the Helmholtz equation into an initial value problem. Later on the local orthogonaltransformation is developed for a waveguide having two media inside with flattop, a flat bottom and a curved interface. This local orthogonal transformation is used toflatten the interface and also to transform the Helmholtz equation into a simple, solvableordinary differential equation. In this paper we present operator formulation for the partwith flat bottom and curved top including a curved interface. In the ordinary differentialequation with operators in coefficients, obtained after the transformation, all the operationsrelated to the transverse variable are treated as operators while the derivative withrespect to the range variable is kept.

  • 35.
    Ahmed, Samaar
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Akram, Junaid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Promotion of Knowledge Sharing culture at local branch of a global Professional Services Firm: an Exploratory Case Study2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Professional Services Firms promote knowledge sharing cultures to maintain consistency in the internal flow of organizational knowledge. Building a knowledge sharing culture takes tough time. Enterprises make lot of efforts to share knowledge in effective way by adjusting the influencing factors like changing the organisational structure and culture, motivation and evaluation mechanism etc. Any knowledge management strategy designed to improve business performance must address the component “organizational culture” that includes behaviours, norms and practices. Organisation needs to promote knowledge sharing by adopting various methods for motivating employees, so they successfully diffuse their knowledge.The purpose of this case study was to explore the different issues faced by global Professional Services Firms while promoting knowledge sharing culture at their local branch. It was interesting to figure out that how a global „Professional Services Firm‟ promotes knowledge sharing culture at their local branch. Aim was also to highlight how these firms can change employee‟s „knowledge-hoarding behaviours‟ to „knowledge-sharing behaviours’ with the help of incentives and rewards.A qualitative exploratory case study was conducted by adopting social constructivist worldview. The research settings for our research were the Ernst & Young (Växjö) branch. Data was collected through observations and interviews. To assist the data collection phase, we have taken permission to observe their daily practises of knowledge sharing twice in a month.The main findings conclude that „Working as a unit‟ and „spirit of helping everyone‟ is a key to promote knowledge sharing culture at global Professional Services Firm‟s local branches. „Low power distances‟ as in „Nordic culture‟ provides solid platform for global Professional Services Firms to promote knowledge sharing culture. This is actually a good way of promoting knowledge sharing culture by decreasing level gap. Findings show that by decreasing level gaps and helping juniors, knowledge can become organisational rather than individual. Our investigation indicates that this local branch hasn‟t adopted any incentive programmes specifically for knowledge sharing. They are managing knowledge sharing with Nordic or Swedish way of working. Non-monetary incentives can be useful to motivate and reinforce specific behaviours of individuals. It can also helpful to boost up cooperative behaviours while working in teams. Professional Services Firms can win the battle of developing a true knowledge sharing culture by working as a unit, reducing power distances and motivating employees.

  • 36.
    Ahmed, Suhail
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sun, Hong
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Developing a Model for Managing Production Performance of Small and Medium Enterprises in Sweden2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The study developed a model for production performance management of small and medium enterprises (SMEs) in Sweden. The developed model works for assessing, follow up and improvement in production performance. SMEs differ in size, structure, culture, competition, management practices, resource availability and lot more when compared with large organizations. SMEs also lack in effective performance management framework as most of the framework developed are designed for large organizations.

     

    Production is core and critical value adding process especially for SMEs manufacturer for their survival and growth. SMEs are more motivated with doing rather than measuring it. Taking all these consideration a comprehensive model is developed which consists of four major steps. The model starts with studying of company’s strategy, and then there are steps for design of production performance measurement which works for identifying details strategically aligned performance measures. Benchmarking step is included to compare performance with best practices, finally measurements results are analysed and improvement actions are taken to continuously improve the production performance.

     

    Developed model based on literature study, multiple case study (three case studies) are being conducted to check model applicability. The result of case studies supports the applicability and formulated problem is also well-answered by developed model.

  • 37.
    Ahsan, Murshidul
    et al.
    Bangladesh Agricultural University, Bangladesh.
    Hasan, Badrul
    Uppsala University.
    Algotsson, Magnus
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Sarenbo, Sirkku
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Casting methods, slaughtering activities, hygiene practice and animal welfare of cattle-buffalo at local slaughter houses in Bangladesh2012In: Presented at the Eighteenth BSVER Annual Scientific Conference (BSVER ASCon XVIII) Bangladesh Agricultural University (BAU). Mymensingh-2202, Bangladesh, 18-19 February 2012, 2012, p. 34-35Conference paper (Other academic)
    Abstract [en]

    The study documented first time in Bangladesh of different locally practiced rope casting methods of Cattle-buffalo before slaughtering at local slaughter houses of six representative places of five different districts. The study also documented the most inhumane and primitive system of Cattle-buffalo transportation and handling in the abattoirs from both native and cross-border traded source. Animals were transported by driving on foot or in crowded truck for several days over harsh road without feed, water and adequate rest. We found that 89.06% animals were injured at sacral, ribs and shoulder area due to transportation in densely populated truck among 64 injured animals. It revealed that animals were slaughtered beside human toilet, road sides, unclean surface; and Dogs, Crows and Chickens easily entered at slaughter area. More than 21% animals were in very poor health condition and cachectic and 21.19% animals were injured and 11.25% animals had other clinical signs among 302 inspected animals. Diarrhoea was predominant other than injury (59.09%) and elevated body temp to the next (25%) and one pregnant animal also found to slaughter. We also detected six heavily injured and one highly exhausted lied animals just after unloading of truck by instant inspection at Cattle market. The research revealed that in Bangladesh Muslim Scholars permit conditional stunning before slaying but lack of facilities and information, humane slaughtering method is not practiced. Lack of implementation of the “Animal Slaughter and Meat Control Act”, absence or weak inspection of veterinarian increased unauthorized butcher-man and slaughter house; unhygienic, unsafe and lower quality meat production; animal welfare concern and zoonotic disease risk. 

  • 38.
    Aidemark, Jan
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    A Multi-Dimensional Knowledge ManagementSystems Planning Approach2010In: Journal of information & knowledge management, ISSN 0219-6492, Vol. 09, no 03, p. 291-302Article in journal (Refereed)
  • 39.
    Aidemark, Jan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Askenäs, Linda
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Exploring learning in Patient-centered care2011In: Americas conference on information systems, 2011, 2011Conference paper (Refereed)
  • 40.
    Aidemark, Jan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Askenäs, Linda
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Patient-Centered Care as a Learning Process2012In: Electronic Healtcare: 4th International Conference, eHealth 2011, Málaga, Spain, November 21-23, 2011, Revised Selected Papers / [ed] P. Kostkova, M. Szomszor, and D. Fowler, Springer, 2012, p. 85-92Conference paper (Refereed)
  • 41.
    Airey, John
    et al.
    University of Kalmar, School of Human Sciences.
    Kelly, Greg
    Linder, Cedric
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Martins, Isabel
    Exploring the Landscape of Scientific Literacy: Visions for Research and Practice: Exploring language perspectives2009In: Symposium paper presented at European Science Education Research Association ESERA 2009, 2009Conference paper (Refereed)
  • 42.
    Airey, John
    et al.
    Linnaeus University, Faculty of Humanities and Social Sciences, School of Language and Literature.
    Linder, Cedric
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Tvåspråkig ämneskompetens? En studie av naturvetenskaplig parallellspråkighet i svensk högre utbildning: Bilingual disciplinary literacy? A study of parallel language use in Swedish undergraduate science2010In: Språkvård och språkpolitik: Svenska språknämndens forskningskonferens i Saltsjöbaden 2008 = Language planning and language policy : proceedings of the Swedish Language Council Research Conference in Saltsjöbaden 2008 / [ed] Lars-Gunnar Andersson, Olle Josephson, Inger Lindberg, Mats Thelander, Stockholm: Norstedts Förlag, 2010, p. 195-212Chapter in book (Other academic)
  • 43.
    Akhtar, Asim
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Alahi, Hassan Mateen
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Sehnan, Moeed
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Simulation of Phased Arrays with Rectangular Microstrip Patches on Photonic Crystal Substrates2012Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    This thesis describes the investigation of photonic crystals as a substrate in microstrip phased array antennas. Alumina with a relative dielectric constant of 9.6 is used as substrate to obtain miniaturization of the components in the high-frequency range. The proposed design consists of four rectangular patches in a linear array conguration operating at 12 GHz. The antenna elements are excited by a microstrip feed line using the inset feeding technique for perfect impedance matching. A beam steering of 20o is achieved using a switched line phase shifter. Antenna parameters, including impedance matching, bandwidth, gain, directivity and the S parameters of the proposed array antenna are obtained. The simulation results are obtained with the Advanced Design System (ADS) simulator.

  • 44.
    Akkaya, Deniz
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Thalgott, Fabien
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Honeypots in network security2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Day by day, more and more people are using internet all over the world. It is becoming apart of everyone’s life. People are checking their e-mails, surfing over internet, purchasinggoods, playing online games, paying bills on the internet etc. However, while performingall these things, how many people know about security? Do they know the risk of beingattacked, infecting by malicious software? Even some of the malicious software arespreading over network to create more threats by users. How many users are aware of thattheir computer may be used as zombie computers to target other victim systems? Astechnology is growing rapidly, newer attacks are appearing. Security is a key point to getover all these problems. In this thesis, we will make a real life scenario, using honeypots.Honeypot is a well designed system that attracts hackers into it. By luring the hackerinto the system, it is possible to monitor the processes that are started and running on thesystem by hacker. In other words, honeypot is a trap machine which looks like a realsystem in order to attract the attacker. The aim of the honeypot is analyzing, understanding,watching and tracking hacker’s behaviours in order to create more secure systems.Honeypot is great way to improve network security administrators’ knowledge and learnhow to get information from a victim system using forensic tools. Honeypot is also veryuseful for future threats to keep track of new technology attacks.

  • 45. Aksimsek, Sinan
    et al.
    Cinar, Gökhan
    Nilsson, Börje
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Nordebo, Sven
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    TEM wave propagation in a coaxial cable with a step discontinuity on the outer wall2012Report (Other academic)
  • 46. Albertazzi, Simone
    et al.
    Basile, Francesco
    Barbera, Davide
    Benito, Patricia
    Brandin, Jan
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Einvall, Jessica
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Fornasari, Giuseppe
    Trifirò, Ferruccio
    Vaccari, Angelo
    Deactivation of a Ni-Based Reforming Catalyst During the Upgrading of the Producer Gas, from Simulated to Real Conditions2011In: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 54, no 10, p. 746-754Article in journal (Refereed)
    Abstract [en]

    The deactivation of a nickel reforming catalyst during the upgrading of the producer gas obtained by gasification of lignocellulosic biomass was studied. The research involved several steps: the selective deactivation of the catalyst in a laboratory scale; the streaming of the catalyst with the producer gas of a downdraft and an oxygen/steam circulating fluidized bed (CFB) gasifier; and tests in a reformer placed in a slipstream of the CFB gasifier. The information obtained allowed to elucidate the catalyst deactivation mechanisms taking place during the reforming of the producer gas: physical deactivation by deposition of fine ashes, aerosol particulate or carbon; poisoning by H2S and HCl present in the gas phase and thermal sintering because of the high operation temperatures required to avoid the chemical deactivation. These physical and chemical effects depended on the composition of the biomass fuel.

  • 47.
    Albet-Torres, Nuria
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Gunnarsson, Anders
    Persson, Malin
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Balaz, Martina
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Höök, Fredrik
    Månsson, Alf
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Molecular motors on lipid bilayers and silicon dioxide: different driving forces for adsorption2010In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 6, no 14, p. 3211-3219Article in journal (Refereed)
    Abstract [en]

    Understanding how different types of interactions govern adsorption of the myosin motor fragment heavy meromyosin (HMM) onto different substrates is important in functional studies of actomyosin and for the development of motor powered lab-on-a-chip applications. In this study, we have combined in vitro motility assays and quartz crystal microbalance with dissipation (QCM-D) monitoring to investigate the underlying adsorption mechanisms of HMM onto supported lipid bilayers in comparison with pure and silanized SiO2. The QCM-D results, combined with data showing actin transportation by HMM adsorbed onto positively charged supported lipid bilayers, suggest reversible HMM surface adsorption via the negatively charged coiled-coil tail region. In contrast, the QCM-D data for HMM adsorption onto negatively charged lipids support a model according to which HMM adsorbs onto negatively charged surfaces largely via the positively charged actin binding regions. Adsorption studies at low (30-65 mM) and high (185-245 mM) ionic strengths onto piranha cleaned SiO2 surfaces (contact angle < 20 degrees) support this general model. However, unlike the situation for charged lipids, rinsing in high ionic strength solution caused only partial HMM desorption from SiO2, without restoration of actin propulsion by the remaining HMM molecules. This suggests that mechanisms other than electrostatic interactions are involved in the tethering of HMM heads to SiO2 surfaces. An expanded model for HMM adsorption is formulated on the basis of the data and the potential of the results for nanotechnological applications of actomyosin is discussed.

  • 48.
    Albet-Torres, Nuria
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Månsson, Alf
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Long-Term Storage of Surface-Adsorbed Protein Machines2011In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 27, no 11, p. 7108-7112Article in journal (Refereed)
    Abstract [en]

    The effective and simple long-term storage of complex functional proteins is critical in achieving commercially viable biosensors. This issue is particularly challenging in recently proposed types of nanobiosensors, where molecular-motor-driven transportation substitutes microfluidics and forms the basis for novel detection schemes. Importantly, therefore, we here describe that delicate heavy meromyosin (HMM)-based nanodevices (HMM motor fragments adsorbed to silanized surfaces and actin bound to HMM) fully maintain their function when stored at -20 degrees C for more than a month. The mechanisms for the excellent preservation of acto-HMM motor function upon repeated freeze thaw cycles are discussed. The results are important to the future commercial implementation of motor-based nanodevices and are of more general value to the long-term storage of any protein-based bionanodevice.

  • 49. Albeverio, S
    et al.
    Khrennikov, Andrei
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Shelkovich, V
    Theory of p-adic distributions: linear and nonlinear models2010Book (Refereed)
  • 50.
    Albeverio, Sergio
    et al.
    University of Bonn, Institute of Applied Mathematics.
    Hilbert, Astrid
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Kolokoltsov, Vassili
    University of Warwick, Department of Statistics.
    Uniform Asymptotic Bounds for the Heat Kernel and the Trace of a Stochastic Geodesic Flow2012In: Stochastics: An International Journal of Probablitiy and Stochastic Processes, ISSN 1744-2508, E-ISSN 1744-2516, Vol. 84, no 2-3, p. 315-333Article in journal (Refereed)
    Abstract [en]

    We analyze the asymptotic behaviour of the heat kernel dened by a stochastically perturbedgeodesic ow on the cotangent bundle of a Riemannian manifold for small time and smalldiusion parameter. This extends WKB-type methods to a particular case of a degenerateHamiltonian. We give uniform bounds for the solution of the degenerate Hamiltonian boundaryvalue problem for small time. The results are exploited to derive two sided estimates andmultiplicative asymptotics for the heat kernel semigroup and its trace.

1234567 1 - 50 of 2881
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