Search for dissertations about: "Boundary object"

Showing result 11 - 15 of 75 swedish dissertations containing the words Boundary object.

2. 11. Boundary Detection in Cardiovascular Ultrasonic Images Based on Multiscale Dynamic Programming

   Author : Quan Liang; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multiscale dynamic programming; artery measurement; cardiac measurement; edge-preserving smoothing; ultrasonic imaging; boundary detection;

   Abstract : Non-invasive ultrasonic imaging is widely used in cardiovascular studies as well as clinical diagnostics. This is due to its non-invasiveness, low cost and easy operation. However, ultrasonic images are noisy and present artifacts, speckles, and echo dropouts. READ MORE

4. 12. A Novel Fiber Interaction Method for Simulation of Early Paper Forming

   Author : Gustav Kettil; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fiber suspension flow model; object-object interaction model; contact forces; lay down simulations; paper forming; immersed boundary methods; contact forces;

   Abstract : In the forming section of a paper machine, a fiber suspension is flowing down onto a forming fabric, and a paper structure is formed. By using computer simulations this process can be studied, attaining new knowledge helping to improve paper quality and machine efficiency. READ MORE

5. 13. Numerical approximations of time domain boundary integral equation for wave propagation

   Author : Andreas Atle; KTH; []
   Keywords : MOT; Marching on in time; boundary integral equations;

   Abstract : Boundary integral equation techniques are useful in thenumerical simulation of scattering problems for wave equations.Their advantage over methods based on partial di.erentialequations comes from the lack of phase errors in the wavepropagation and from the fact that only the boundary of thescattering object needs to be discretized. READ MORE

6. 14. Study of generation, growth and breakdown of streamwise streaks in a Blasius boundary layer

   Author : Luca Brandt; KTH; []
   Keywords : Fluid mechanics; laminar-turbulent transition; boundary layer flow; transient growth; streamwise streaks; lift-up effect; receptivity; free-stream turbulence; streak instability; secondary instability; Direct Numerical Simulation.;

   Abstract : Transition from laminar to turbulent flow has beentraditionally studied in terms of exponentially growingeigensolutions to the linearized disturbance equations.However, experimental findings show that transition may occuralso for parameters combinations such that these eigensolutionsare damped. READ MORE

7. 15. Boundaries, believers and bodies : a cultural analysis of a multidisciplinary research community

   Author : Helena Pettersson; Britta Lundgren; Erik Stolterman; David Hakken; Umeå universitet; []
   Keywords : HUMANIORA; HUMANITIES; Culture; ethnographic method; research; technology; boundary object work; symbolic capital; technoromanticism; future; speed; creativity; reality; dystopia; focal things; trading; multidisciplinary; gender; reflexivity; Ethnology; Etnologi;

   Abstract : The aim of this study is to analyze the construction of research culture and collaboration within the research studio Tools for Creativity, one node in the larger Interactive Institute. This studio is an arena that in today’s society is associated with boundary crossing, dynamics and variability: An environment with high-tech equipment, a staff equipped with diverse skills, and a flexible approach with the ambition of developing innovative tools based on ICT to strengthen human creativity. READ MORE