Sökning: "urban andersson"

Visar resultat 1 - 5 av 61 avhandlingar innehållade orden urban andersson.

1. 1. An exerimental study of the flow in a sharp-heel draft tube

   Författare :Urban Andersson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : The goal of the Turbine 99 Draft Tube experiments is to provide extensive experimental data on a well-defined sharp-heel draft-tube flow. The data bank has served as calibration data for the simulation challenge presented by the Turbine 99 workshop in Porjus in June 1999. LÄS MER

3. 2. An experimental study of the flow in a sharp-heel Kaplan draft tube

   Författare :Urban Andersson; Torbjørn K Nilsen; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : This research project was originally part of a package (Turbine-99 Draft Tube) that had a mutual goal, to improve the understanding of draft tube flow and establish Best Practise Guidelines for simulation of draft tube flow.The draft tube is situated after the runner in a Hydropower turbine to recover as much of the remaining head and kinetic energy as possible before the water leaves the turbine. LÄS MER

4. 3. Urban Evolution

   Författare :Claes Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : In nature, objects formed from a dynamics on one level often form yet new objects and new dynamics on a new level. This process generates a hierarchical organization of nature that is particularly tall for objects that are of biological or human origin. LÄS MER

5. 4. Framing the water and sanitation challenge : A history of urban water supply and sanitation in Ghana 1909 - 2005

   Författare :Anna Bohman; Lena Andersson-Skog; Urban Strandberg; Björn-Ola Linnér; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ghana; urban water supply; sanitation; institutional change; policy development; frames; private sector participation; economic history; Economic history; Ekonomisk historia; ekonomisk historia; Economic History;

   Sammanfattning : This thesis analyses the development of urban water supply and sanitation services in Ghana from 1909 to 2005.  Special focus is put on institutional arrangements with regard to networked, large scale and centrally managed water and sewerage services. LÄS MER

7. 5. Exploring Perceptions of Route Environments in Relation to Walking

   Författare :Dan Andersson; Peter Schantz; Lina Wahlgren; Eva Andersson; Maria Johansson; Gymnastik- och idrottshögskolan; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicin Teknik; Medicine Technology;

   Sammanfattning : Background: Every walk takes place in a route environment, which can play an important role in deterring or facilitating walking. The focus of this thesis is on the perceptions of environmental variables, and how they relate to appraisals of route environments as hindering – stimulating for walking and unsafe – safe for reasons of traffic, in two metropolitan environments. LÄS MER