Sökning: "gudrun brattström"

Hittade 4 avhandlingar innehållade orden gudrun brattström.

1. 1. Evaluation of climate model simulations by means of statistical methods

   Författare :Ekaterina Fetisova; Gudrun Brattström; Rolf Sundberg; Anders Moberg; Peter Guttorp; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Climate models; Climate proxy; Pseudo-proxy experiment; Factor analysis; the Wald confidence interval; the Fieller confidence set.; Mathematical Statistics; matematisk statistik;

   Sammanfattning : Evaluation of climate model simulations is a key issue within climate research. The statistical framework proposed by Sundberg et al., 2012, provides a theoretical underpinning of methods for evaluation of climate models by use of climateproxy data from the last millennium. LÄS MER

3. 2. Towards a flexible statistical modelling by latent factors for evaluation of simulated responses to climate forcings

   Författare :Ekaterina Fetisova; Gudrun Brattström; Anders Moberg; Rolf Sundberg; Johan Lindström; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Confirmatory Factor Analysis; Measurement Error models; Structural Equation models; Wald confidence interval; Fieller confidence set; Climate model simulations; Climate forcings; Climate proxy data; Detection and Attribution; Mathematical Statistics; matematisk statistik;

   Sammanfattning : In this thesis, using the principles of confirmatory factor analysis (CFA) and the cause-effect concept associated with structural equation modelling (SEM), a new flexible statistical framework for evaluation of climate model simulations against observational data is suggested. The design of the framework also makes it possible to investigate the magnitude of the influence of different forcings on the temperature as well as to investigate a general causal latent structure of temperature data. LÄS MER

4. 3. Matematiskt begåvade ungdomars motivation och erfarenheter av utvecklande verksamheter

   Författare :Verner Gerholm; Kerstin Petterson; Gudrun Brattström; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; gifted education; mathematical activities; mathematics education; mathematically gifted students; motivation; Self Determination Theory; matematikämnets didaktik; Mathematics Education;

   Sammanfattning : This licentiate thesis deals with some influencing factors to develop mathematicalabilities among mathematical gifted adolescents. Krutetskii’s structureof the mathematical abilities and Mönks’ triadic model of giftedness isused as a theoretical framework.The thesis consists of two articles with different aims. LÄS MER

5. 4. Mathematics achievement of early and newly immigrated students in different topics of mathematics

   Författare :Jöran Petersson; Eva Norén; Gudrun Brattström; Markku Hannula; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; achievement profile; grade 9; mathematics achievement; mathematics education; second language learners; statistics literacy; student as-sessment; matematikämnets didaktik; Mathematics Education;

   Sammanfattning : This thesis aims to explore the mathematics achievement of second language immigrants in compulsory school as they continue their schooling in Sweden. Specifically, the thesis aims to generate more knowledge about different sub-categories of second language students, namely newly arrived immigrants, early arrived immigrants and other second language students in compulsory school. LÄS MER