Sökning: "losses"

Visar resultat 41 - 45 av 1394 avhandlingar innehållade ordet losses.

1. 41. Notifications and job losses on the Swedish labour market

   Författare :Ann-Christin Jans; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Arbetslöshet; Sverige; 1990-talet; uppsägning;

   Sammanfattning : .... LÄS MER

3. 42. Process-based modelling of N losses from terrestrial ecosystems

   Författare :Josefine Nylinder; Göteborgs universitet; []
   Nyckelord :;

   Sammanfattning : Nitrogen (N) loss to atmosphere and ground water can contribute to environmental destruction, by N emission as the greenhouse gas nitrous oxide (N2O) and by leaching of N to contamination and eutrophication of water. Dynamic models are important keys to increase the knowledge of ecosystems N processes. LÄS MER

4. 43. Food Packaging for Sustainable Development

   Författare :Helén Williams; Fredrik Wikström; Ole Jørgen Hanssen; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Packaging; sustainable development; service perspective; food losses; food waste; consumer interaction; life cycle assessment - LCA; consumer value; Miljö- och energisystem; Environmental and Energy Systems;

   Sammanfattning : Packaging has been on the environmental agenda for decades. It has been discussed and debated within the society mainly as an environmental problem. Production, distribution and consumption of food and drinks contribute significant to the environmental impact. However, consumers in the EU waste about 20% of the food they buy. LÄS MER

5. 44. On Inter-bar Currents in Induction Motors with Cast Aluminium and Cast Copper Rotors

   Författare :Alexander Stening; Chandur Sadarangani; Ola Aglén; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Induction motors; Inter-bar currents; Copper rotors; Aluminium rotors; Starting torque; Asynchronous torques; Starting current; Stray losses; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : This thesis presents a study of the effects of inter-bar currents on inductionmotor starting performance and stray-load losses. The work is focused on theperformance differences between aluminium and copper casted rotors.A method to predict the stator current when starting direct-on-line isdeveloped. LÄS MER

7. 45. Slotless High-Performance Electric Drives : Harmonic Loss Analysis, Sensorless Control, and Inverter Design

   Författare :Jonas Millinger; Oskar Wallmark; Juliette Soulard; Zi-Qiang Zhu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite-element analysis; harmonic losses; sensorless control; slotless motor drives; thermal modeling; wide-bandgap inverter; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Electric motor drives are a cornerstone for many fundamental functions in today’s society, and their expected dominance within the transport sector is considered one of the main keys to abate global warming. Subsequently, the incentives for improved performance of electric motor drives cannot be sufficiently emphasized. LÄS MER