Sökning: "particle-tracking"

Visar resultat 1 - 5 av 79 avhandlingar innehållade ordet particle-tracking.

1. 1. Biological Insights from Single-Particle Tracking in Living Cells

   Författare :Arash Sanamrad; Johan Elf; Måns Ehrenberg; Achillefs Kapanidis; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; single-particle tracking; intracellular diffusion; nucleoid exclusion; transcription-translation coupling; antibiotics; Biology with specialization in Molecular Biotechnology; Biologi med inriktning mot molekylär bioteknik;

   Sammanfattning : Single-particle tracking is a technique that allows for quantitative analysis of the localization and movement of particles. In this technique, trajectories are constructed by determining and connecting the positions of individual particles from consecutive images. LÄS MER

3. 2. Optical characterisation of subwavelength dielectric particles using particle tracking beyond the Stokes-Einstein relation

   Författare :Erik Olsén; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; off-axis holography; Optical microscopy; size determination; particle tracking; partial slip; lipid vesicles; particle dynamics;

   Sammanfattning : As the importance of nanoparticles continues to increase in both biology and industrial processes, so does the need for accurate and versatile characterisation methods. However, most light-based methods to quantify size and refractive index of individual particles are either limited to snapshot observations, particles larger than the wavelength of light, non-dynamic particle properties, or assuming the hydrodynamic boundary conditions without experimental evaluation. LÄS MER

4. 3. Impedance and Instabilities in the MAX IV 3 GeV Ring

   Författare :Galina Skripka; Lunds universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Collective effects; geometric impedance; resistive wall impedance; wakefields; particle tracking; harmonic cavity;

   Sammanfattning : To ensure the beam with an ultralow emittance and high current the possible effects deteriorating the beam stability must be investigated. When ultrarelativistic particles travel in the vacuum chamber they induce electromagnetic fields which can act back on them and the following particles. LÄS MER

5. 4. Macroscopic modeling of fluid dynamics in large-scale circultaing fluidized beds

   Författare :David Pallarès; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fuel mixing; fluid dynamics; large-scale circulating fluidized bed; particle tracking;

   Sammanfattning : Satisfactory knowledge of the fluid dynamics governing the gas-solid flow in large-scaleCirculating Fluidized Bed (CFB) units is still lacking, although the CFB technology is widelyused for power (and heat) generation. Due to the complex two-phase flow in large CFB unitsfluid dynamical modeling of practical use is so far limited to a macroscopic approach andavailable models generally focus in describing one of the following key-phenomena: maingas-solid flow pattern, mixing of fuel particles and gas mixing. LÄS MER

7. 5. Three-Dimensional Simulation and Physical Modelling of Flows in Detention Tanks - Studies of Flow Pattern, Residence Time and Sedimentation

   Författare :Åsa Adamsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tracer study; pond; numerical simulation; particle tracking; CFD; bed shear stress; storage tank; stormwater; detention tank; flow pattern;

   Sammanfattning : Improving effluent water quality to receiving waters using stormwater ponds and storage tanks is acknowledged to be an effective method. The performance of the method depends however on flow conditions such as velocity distribution, short-circuiting currents and the volume through which the influent water flows, the so called effective volume. LÄS MER