Search for dissertations about: "column"

Showing result 16 - 20 of 503 swedish dissertations containing the word column.

  2. 16. Radiation Therapy Patient Scheduling: An Operations Research Approach

    Author : Sara Frimodig; Per Enqvist; Jan Kronqvist; Mats Carlsson; Willem-Jan van Hoeve; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Radiation therapy scheduling; patient scheduling; multi-appointment scheduling; operations research; integer programming; constraint programming; column generation; Schemaläggning; strålterapi; operationsanalys; heltalsprogrammering; villkorsprogrammering; kolumngenerering; Optimeringslära och systemteori; Optimization and Systems Theory;

    Abstract : The manual scheduling of patients for radiation therapy is difficult and labor-intensive. With the increase in cancer patient numbers, efficient resource planning is an important tool to achieve short waiting times and equal right to care. This thesis studies an operations research approach to the radiation therapy scheduling problem. READ MORE

  4. 17. The Tail Assignment Problem

    Author : Mattias Grönkvist; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; hybrid optimization; fleet planning; aircraft routing; column generation; airline optimization; tail assignment; constraint programming;

    Abstract : The Aircraft Assignment problem is the problem of assigning flights to aircraft in such a way that some operational constraints are satisfied, and possibly that some objective function is optimized.We propose an approach to aircraft assignment which captures all operational constraints, including minimum connection times, airport curfews, maintenance, and preassigned activities. READ MORE

  5. 18. Composite Action and Confinement Effects in Tubular Steel-Concrete Columns

    Author : Mathias Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; connection; composite action; composite column; finite element analysis; bond; confined concrete; high-strength concrete; experiment; concrete-filled steel tube;

    Abstract : Composite columns composed of concrete-filled steel tubes (CFT) have become increasingly popular in structural applications around the world. This type of column can offer many advantages, for instance, high strength, ductility, and large energy absorption capacity, as well as increased speed of construction, positive safety aspects, and possible use of simple standardized connections. READ MORE

  6. 19. Multivariate spectroscopic methods for the analysis of solutions

    Author : Kent Wiberg; Sven Jacobsson; Lars Nørgaard; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemometrics; UV-Vis spectroscopy; Multivariate calibration; Lidocaine; Identity; Content; PLS; SIMCA; Non-column; Diode array UV spectroscopy; DAD; Control sample; High Capacity Analysis HCA ; Fluorescence spectroscopy; Albumin; Immunoglobulin G; HPLC-DAD; Prilocaine; Peak purity determination; PCA; PARAFAC; Partial separation; Curve resolution; Analytical chemistry; Analytisk kemi;

    Abstract : In this thesis some multivariate spectroscopic methods for the analysis of solutions are proposed. Spectroscopy and multivariate data analysis form a powerful combination for obtaining both quantitative and qualitative information and it is shown how spectroscopic techniques in combination with chemometric data evaluation can be used to obtain rapid, simple and efficient analytical methods. READ MORE

  7. 20. Dispersal in free-living, marine, benthic nematodes : passive or active processes?

    Author : Jörgen Ullberg; Emil Ólafsson; John Lambshead; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nematod; dispersial; water column; choice; algal mats; disturbance; meiofauna; community; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Abstract : Meiofauna, and especially marine nematodes are common in sediments around the world. Despite very wide ranging distributions in many nematode species, little is presently known about their dispersal mechanisms shaping these patterns. Rafting, and perhaps ballast water transport has been suggested as viable means for nematode long-range transport. READ MORE