Search for dissertations about: "Field shift"

Showing result 21 - 25 of 333 swedish dissertations containing the words Field shift.

  2. 21. Predicting the sound field from aeroacoustic sources on moving vehicles : Towards an improved urban environment

    Author : Nicolas Pignier; Ciarán O'Reilly; Susann Boij; Michael Carley; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pass-by simulations; aeroacoustic sources; urban sound propagation; direct numerical beamforming; linear programming deconvolution; Kirchhoff approximation; moving sources; detached-eddy simulation; Ffowcs Williams-Hawkings; vehicle design; förbifartssimuleringar; aeroakustiska källor; urban ljudutbredning; direkt numerisk lobformning; avfaltning med hjälp av linjärprogrammering; Kirchhoffs approximation; rörliga källor; detached-eddy simulation; Ffowcs Williams-Hawkings; fordonsdesign; Vehicle and Maritime Engineering; Farkostteknik;

    Abstract : In a society where environmental noise is becoming a major health and economical concern, sound emissions are an increasingly critical design factor for vehicle manufacturers. With about a quarter of the European population living close to roads with heavy traffic, traffic noise in urban landscapes has to be addressed first. READ MORE

  4. 22. Nematic Liquid Crystal Spatial Light Modulators for Laser Beam Steering

    Author : Emil Hällstig; Mikael Lindgren; Lars Sjöqvist; William Crossland; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; spatial light modulator; liquid crystal; beam steering; tracking; phase modulation; fringing field; director distribution; finite-difference time-domain; polarization; temporal properties; Fysik; Physics; Fysik;

    Abstract : Laser beam control is important in many applications. Phase modulating spatial light modulators (SLMs) can be used to electronically alter the phase distribution of an optical wave-front and thus change the direction and shape of a laser beam. READ MORE

  5. 23. Responses of peatland vegetation to enhanced nitrogen

    Author : Magdalena Wiedermann; Lars Ericson; Juul Limpens; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sphagnum; nitrogen; peatlands; soluble amino acids; gradient study; field experiment; Biology; Biologi;

    Abstract : Human alteration of the global nitrogen (N) cycle has had major impacts on naturally N-limited ecosystems worldwide. Peatlands, dominated by peat mosses, Sphagnum species, represent one such sensitive ecosystem. READ MORE

  6. 24. Swedish Working Life Research : Formation and conceptual development of a research field in transition

    Author : Carin Håkansta; Ann Bergman; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Work Environment; Industriell produktionsmiljö; Arbetsvetenskap; Human Work Science;

    Abstract : The purpose of this thesis is to contribute to the understanding of working life research in Sweden by focusing on the conceptual and institutional evolution of the field. The analyses include the roles of the researchers and other actors as well as theories and processes that form and have formed working life research. READ MORE

  7. 25. Automated Patient-Specific Multi-tissue Segmentation of MR Images of the Head

    Author : Mahmood Qaiser; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D image segmentation; mean shift; Bayesian; Magnetic resonance; brain or head tissues; source localization.;

    Abstract : The automated segmentation of magnetic resonance (MR) images of the human head is an active area of research in the field of neuroimaging. The resulting segmentation yields a patient-specific labeling of individual tissues and makes possible quantitative characterization of these tissues (e.g. READ MORE