Sökning: "initial conditions"

Visar resultat 16 - 20 av 973 avhandlingar innehållade orden initial conditions.

  1. 16. Conditions for Technology Enhanced Learning and Educational Change : a case study of a 1:1 initiative

    Författare :Marcia Håkansson Lindqvist; Anders D. Olofsson; Limin Gu; Trond-Eiliv Hauge; Rosemary Luckin; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; digital technologies; ICT; laptops; one-to-one; school development; school leaders; students; teachers; teacher professional development; TEL;

    Sammanfattning : The uptake and use of digital technologies continues to increase in schools throughout the world. In many schools the uptake and use of digital technologies takes place in One-to-One (1:1) initiatives in which teachers and students have their own laptops. LÄS MER

  3. 17. Lone parenting, socioeconomic conditions and severe ill-health : longitudinal register-based studies

    Författare :Gunilla Ringbäck Weitoft; Denny Vågerö; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Public health; Single parent; single mother; single father; children; risk factor; socio-economic status; mortality; morbidity; injury; psychiatric disease; education; epidemiology; longitudinal; Folkhälsomedicin; Public health medicine research areas; Folkhälsomedicinska forskningsområden; epidemiologi; Epidemiology;

    Sammanfattning : The general aims of this dissertation are to analyse how family situation, and especially lone parenting, influence health and life chances in Sweden and the extent to which possible relations are influenced by socioeconomic circumstances and health selection. In two population-based cohort studies we analysed overall and cause-specific mortality (1991-95), and also severe morbidity (1991-94) from different causes among lone mothers in comparison with mothers with partners. LÄS MER

  4. 18. The initial phase of sodium sulfite pulping of softwood : A comparison of different pulping options

    Författare :Raghu Deshpande; Ulf Germgård; Pedro Fardim; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Activation energy; acid sulfite pulping; bisulfite pulping; cellulose; delignification; dissolving pulp; extractives; glucomannan; hemicelluloses; lignin; lignin condensation; lignin carbohydrate complexes; pine; spruce; thiosulfate; total SO2; xylan; Chemical Engineering; Kemiteknik;

    Sammanfattning : Single stage and two-stage sodium sulfite cooking were carried out on either spruce, pine or pure pine heartwood chips to investigate the influence of several process parameters on the initial phase of such a cook down to about 60 % pulp yield. The cooking experiments were carried out in the laboratory with either a lab-prepared or a mill-prepared cooking acid and the temperature and time were varied. LÄS MER

  5. 19. Confined Compression of Single Particles : Development of a Novel Triaxial Testing Instrument and Particle-Scale Modelling

    Författare :Henrik Jonsson; Göran Frenning; Göran Alderborn; Abderrahim Michrafy; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Powder compaction; Compression; Single particle; Particle mechanics; Powder mechanics; Confined conditions; Triaxial; Apparatus design; Modelling; Galenisk farmaci; Pharmaceutics;

    Sammanfattning : When predicting the performance of a powder compaction process, assessing the behaviour of the particles comprising the powder bed is of central relevance. Currently, however, no experimental methods are available for mimicking the multiaxial loading conditions imposed on the individual particles in a powder bed during compaction, and such analyses are therefore usually performed in silico. LÄS MER

  7. 20. Experimental and analytical study of thermal mixing at reactor conditions

    Författare :Mattia Bergagio; Henryk Anglart; Horst-Michael Prasser; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-cycle thermal fatigue; Hilbert-Huang transform; large eddy; WALE; rainflow; inverse heat conduction; adjoint conjugate gradient; Energy Technology; Energiteknik; Fysik; Physics;

    Sammanfattning : High-cycle thermal fatigue due to turbulent mixing of streams at distinct temperatures is an interdisciplinary issue affecting safety and life extension of existing reactors together with the design of new reactors. It is challenging to model damage and thermal loads arising from the above mixing. LÄS MER