Sökning: "feed-back"

Visar resultat 16 - 20 av 82 avhandlingar innehållade ordet feed-back.

1. 16. Life-history consequenses of host plant choice in the comma butterfly

   Författare :Lina Söderlind; Sören Nylin; Niklas Janz; Charles W. Fox; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nymphalidae; voltinism; larval performance; Hopkins’ Host Selection Principle; GeneFishing; real-time qPCR; Urtica dioica; Salix cinerea; Betula pubescens; Ulmus glabra; Ribes uva-crispa.; zoologisk ekologi; Animal Ecology;

   Sammanfattning : There is much evidence that herbivory is a key innovation for the tremendous success of insect. In this thesis I have investigated different aspects of host plant utilization and phenotypic plasticity using the polyphagous comma butterfly, Polygonia c-album. LÄS MER

3. 17. Cobalamin communication in Sweden 1990 – 2000 : views, knowledge and practice among Swedish physicians

   Författare :Mats Nilsson; Johan Lökk; Göran Westman; Bo Norberg; Kurt Svärdsudd; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine; Cobalamin; folate; iron; homocysteine; MMA; vitamin B12 deficiency; therapy tradition; drug epidemiology; communication; receivers; senders; Medicin; Dermatology and venerology; clinical genetics; internal medicine; Dermatologi och venerologi; klinisk genetik; invärtesmedicin; medicin; Medicine;

   Sammanfattning : Cobalamin (vitamin B12) is one of several essential micronutrients needed by the human organism. Other important micronutritients, which interplay with vitamin B12, are folate and iron. During the last ten years, the attention has been drawn to different forms of neurological disorders supposed to be caused by vitamin B12 deficiency. LÄS MER

4. 18. Intake air dynamics on a turbocharged SI-engine with wastegate

   Författare :Per Andersson; Linköpings universitet; []
   Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : On turbocharged spark-ignited (SI) engines with wastegate the position of the wastegate changes the exhaust manifold pressure. A secondary effect of this is that the residual gas mass trapped inside the cylinder at exhaust valve closing changes and causes the volumetric efficiency to change. LÄS MER

5. 19. Digital Dispersion Equalization and Carrier Phase Estimation in 112-Gbit/s Coherent Optical Fiber Transmission System

   Författare :Tianhua Xu; Sergei Popov; Gunnar Jacobsen; Jie Li; Magnus Karlsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Coherent transmission; chromatic dispersion; carrier phase estimation; digital signal processing; Optics; Optik; Photonics; Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Coherent detection employing multilevel modulation format has become one of the most promising technologies for next generation high speed transmission system due to the high power and spectral efficiencies. With the powerful digital signal processing (DSP), coherent optical receivers allow the significant equalization of chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN) and nonlinear effects in the electrical domain. LÄS MER

7. 20. Social-ecological dynamics in a highly regulated fisheries system - Sources of resilience and limits to command-and-control management

   Författare :Jonas Hentati-Sundberg; Henrik Österblom; Margit Eero; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; resilience; social-ecological system; feed-backs;

   Sammanfattning : Sustainable governance of natural resources is challenged by the poor understanding of complex human-nature couplings. Major advancements in resilience theory, acknowledging the importance of social-ecological linkages and the self-organizing capacity of social-ecological systems, provides a new perspective on research in sustainability science. LÄS MER