Sökning: "hr doktorsavhandling"

Visar resultat 11 - 15 av 476 avhandlingar innehållade orden hr doktorsavhandling.

1. 11. Surface Chemical Characteristics of Chromium-alloyed Steel Powder and the Role of Process Parameters during Sintering

   Författare :Dimitris Chasoglou; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbothermal reaction; sintering atmosphere; depth profiling; XPS AES; HR SEM EDX; water atomized powder; surface coverage; reduction oxidation; PM steels; sintering; Cr-Mn-spinel oxides; surface oxides;

   Sammanfattning : Powder Metallurgy (PM) is a cost efficient method suitable for sustainable production of structural parts that have strict dimensional tolerances and complex geometries. It has been a common practice to utilize Ni and Cu as alloying elements in PM steels, but the high and fluctuating prices of Ni and the concerns around it associated with health hazards as well as the difficulty in recycling Cu lead the PM industry to search for effective alternatives such as Cr and Mn. LÄS MER

3. 12. Integrated Antenna Solutions for Wireless Sensor and Millimeter-Wave Systems

   Författare :Shi Cheng; Anders Rydberg; Paul Hallbjörner; Zhining Chen; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; harmonic radar HR ; liquid alloy; millimeter-wave; micromachining; phase shifters; planar inverted cone antennas PICA ; printed circuit boards PCB ; quasi-Yagi antennas; radio frequency microelectromechanical system RF MEMS ; stretchable antennas; substrate integrate waveguides SIW ; T-matched dipole antennas; tapered slot antennas; traveling wave array antennas; ultrawideband UWB ; wireless sensor networks.; Electrical engineering; Elektroteknik; Elektronik; Electronics;

   Sammanfattning : This thesis presents various integrated antenna solutions for different types of systems and applications, e.g. wireless sensors, broadband handsets, advanced base stations, MEMS-based reconfigurable front-ends, automotive anti-collision radars, and large area electronics. LÄS MER

4. 13. Jämtelands afradsland ... under professorens Hr. Anders Berchs inseende ... i Upsala afhandlade och ... framgifne den [...] decemb. 1750 af Henning Tideman, Jämtlänninge

   Författare :Anders Berch; Anders Berch; Uppsala universitet; []
   Nyckelord :Agriculture; Alllmän ekonomisk historia; Jämtland; Lantbruk; Sverige; Lantbruksekonomi;

   Sammanfattning : .... LÄS MER

5. 14. Assessment of physical activity and energy expenditure in adolescents

   Författare :Ulf Ekelund; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Accelerometry; Activity diary; Doubly labelled water; Heart rate monitoring; FLEX HR; Oxygen uptake; Physical activity level; Total energy expenditure; ;

   Sammanfattning : Physical activity (PA) is a complex, multidimensional human behaviour that includes all bodily movement from fidgeting to participation in marathon running. The detailed relationship (i.e. dose - response) between the type and degree of PA and its effects on various aspects of health remains to be elucidated, not least in young people. LÄS MER

7. 15. Dietary intakes of Swedish children and adolescents

   Författare :Emma Patterson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :24-hr recall; nutritional epidemiology; dietary patterns; cardiovascular disease; food-based dietary guidelines; risk factor clustering; tracking;

   Sammanfattning : Background: Knowing what children and adolescents eat, how stable their diets are, and how diet relates to other chronic disease risk factors are important issues for public health nutrition. Setting and design: In 1998-9, 1120 children (grade 3) and adolescents (grade 9) took part in the European Youth Heart Study in Sweden. LÄS MER