Sökning: "JDC"

Hittade 5 avhandlingar innehållade ordet JDC.

1. 1. The Jovian Plasma Dynamics and Composition Analyzer (JDC) for ESA's JUICE Mission

   Författare :Philipp Wittmann; Martin Wieser; Stas Barabash; Krister Wiklund; Frédéric Allegrini; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; JUICE mission; positive ions; negative ions; electrons; time-of-flight; time-of-arrival; PEP; JDC; CEM; channel electron multiplier; pressure; instrument development; calibration; TOF; TOA; fysik; Physics; rymd- och plasmafysik; Space and Plasma Physics;

   Sammanfattning : This dissertation covers the development and calibration of the Jovian plasma Dynamics and Composition analyzer (JDC). JDC is together with five other sensors a part of the Particle Environment Package (PEP), one of the payloads of the European Space Agency's JUpiter ICy moons Explorer (JUICE) mission. LÄS MER

3. 2. Advanced Plasma Analyzer for Measurements in the Magnetosphere of Jupiter

   Författare :Joan Stude; Stas Barabash; Martin Wieser; Joseph H. Westlake; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; plasma instrumentation; time-of-flight; space; Jupiter; JUICE; PEP; JDC; start surface; charge fraction; the final frontier; accidental counts; chance counts; micro pore optics; spherical-wedge electrostatic analyzer; rymd- och plasmafysik; Space and Plasma Physics; fysik; Physics;

   Sammanfattning : The Jupiter Icy Moons Explorer is a planetary exploration mission that aims to study the moons of Jupiter in the planet’s vast magnetosphere. Among the various instruments on board is the Particle Environment Package (PEP), that is led by the Swedish Institute of Space Physics (IRF) in Kiruna. LÄS MER

4. 3. The importance of organizational characteristics for psychosocial working conditions and health

   Författare :Malin Bolin; Björn Halleröd; Staffan Marklund; Annika Härenstam; Birgitta Eriksson; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Organization; workplace; bureaucracy; post-bureaucracy; psychosocial working conditions; JDC model; multilevel analysis; health; sickness absence; Sociology; Sociologi; sociologi; Sociology;

   Sammanfattning : The importance of organizations for understanding differences in the working conditions and health of employees is often emphasized but rarely explored empirically. The general aim of this thesis is to describe organizational characteristics of workplaces, and to assess their impact on the psychosocial working conditions and health of employees. LÄS MER

5. 4. Externally assessed psychosocial work characteristics : a methodological approach to explore how work characteristics are created, related to self-reports and to mental illness

   Författare :Kerstin Waldenström; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Psychosocial work characteristics; exposure assessment; overreporting; psychological well-being; anxiety; depression; work organisation; action strategies; action theory;

   Sammanfattning : The general aim of this thesis was to add knowledge to the area of measurement issues of psychosocial work characteristics and job design by using a more objective methodological approach. Expert assessments were made through direct observations and interviews and are a theory guided nonemotional description that is independent of the specific individuals social or cultural frame of reference. LÄS MER

7. 5. Re-Os dating of molybdenite : new anlytical approaches using ICP-MS

   Författare :Dmitry Malinovskiy; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

   Sammanfattning : In recent years, there has been a surge of interest in the direct dating of ore deposits using Re-Os geochronometer for the ore minerals themselves. Molybdenite has been or particular interest because it is a common ore mineral and is suitable for analysis by the Re-Os method due to relatively high concentration of both Re and Os. LÄS MER