Sökning: "thulin"

Visar resultat 16 - 20 av 38 avhandlingar innehållade ordet thulin.

1. 16. On Confidence Intervals and Two-Sided Hypothesis Testing

   Författare :Måns Thulin; Silvelyn Zwanzig; Burkhardt Seifert; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical Statistics; Matematisk statistik;

   Sammanfattning : This thesis consists of a summary and six papers, dealing with confidence intervals and two-sided tests of point-null hypotheses.In Paper I, we study Bayesian point-null hypothesis tests based on credible sets. A decision-theoretic justification for tests based on central credible intervals is presented. LÄS MER

3. 17. On Exergy and Aero Engine Applications

   Författare :Oskar Thulin; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Installed propulsion unit performance; Turbofan; Aero engine; Performance modelling; Exergy analysis;

   Sammanfattning : Aero engine performance analysis is highly multidimensional using various measures of component performance such as turbomachinery and mechanical efficiencies, and pressure loss coefficients. Using conventional performance analysis, relying on only the first law of thermodynamics, it is possible to understand how the performance parameters affect the component performance, but not how the component performance relates to the system performance. LÄS MER

4. 18. On the Analysis of Energy Efficient Aircraft Engines

   Författare :Oskar Thulin; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Performance modelling; Aero engine; Turbofan; Aircraft engine; Installed propulsion; Ultra high bypass ratio; Exergy analysis; Engine weight estimate; Variable area fan nozzle; Multiple pivoting flaps; Translating cowls;

   Sammanfattning : Aero engine performance analysis is highly multidimensional using various measures of component performance such as turbomachinery and mechanical efficiencies, and pressure loss coefficients. Using conventional performance analysis, relying on only the laws of thermodynamics, it is possible to understand how the performance parameters affect the component performance, but it is difficult to directly compare the magnitude of various loss sources. LÄS MER

5. 19. Essays on Regional Growth, Comparative Advantages and Foreign Direct Investments

   Författare :Per Thulin; Pontus Braunerhjelm; David Audretsch; KTH; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Agglomeration; agglomeration economies; dynamic comparative advantage; FDI; gross domestic investment; industry-specific effects; institutions; labor mobility; market size; R D; regional growth; relative costs; Economics; Nationalekonomi;

   Sammanfattning : This thesis consists of four essays, covering four different topics. The first essay investigates the relationship between inter-firm labor mobility and regional productivity growth. Previous studies have shown that density is positively correlated with growth. LÄS MER

7. 20. Lärares tal och barns nyfikenhet : kommunikation om naturvetenskapliga innehåll i förskolan

   Författare :Susanne Thulin; Niklas Pramling; Ingrid Pramling Samuelsson; Lena Bäckström; Jan-Erik Johansson; Högskolan Kristianstad; Gothenburg University; Göteborgs universitet; []
   Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Early childhood education; Science; Learning; Curriculum; Content; Early childhood education;

   Sammanfattning : The aim of this thesis is to generate new knowledge about how children and teachers communicate scientific contents in preschool. The general research question is formulated as: How do the object of learning and the act of learning appear in communication about scientific contents in preschool? This thesis is a collection of three (previously published) empirical studies and takes shape in the encounter between a projected knowledge acquisition task for preschool and the educational tradition of preschool. LÄS MER