Sökning: "shortening"

Visar resultat 6 - 10 av 217 avhandlingar innehållade ordet shortening.

1. 6. Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels

   Författare :Adnan Prlja; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital data transmission; receivers; decoders; channel modeling; intersymbol interference; ISI; MIMO; Faster-than-Nyquist signaling; complexity reduction; observation models; BCJR algorithm; turbo equalization; iterative detection; channel shortening;

   Sammanfattning : Fast and reliable data transmission together with high bandwidth efficiency are important design aspects in a modern digital communication system. Many different approaches exist but in this thesis bandwidth efficiency is obtained by increasing the data transmission rate with the faster-than-Nyquist (FTN) framework while keeping a fixed power spectral density (PSD). LÄS MER

3. 7. Telomeres in ecology and evolution: Hypotheses and connections between telomere length, infections and life history trade-offs

   Författare :David Gomez Blanco; MEMEG; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; telomeres; life history; telomere elongation; telomere shortening; early-life telomere length; critical threshold; malaria infection; great reed warbler; Acrocephalus arundinaceus;

   Sammanfattning : Studying life history strategies is crucial for understanding the diversity among organisms. The trade-offs in traits related to survival, self-maintenance and reproduction play an important role in the variation of life histories and can be adjusted in response to environmental and physiological factors. LÄS MER

4. 8. Stretch-shortening cycle (SSC) muscle power, muscle strength and functional capacity in Scandinavian women and men - Effects of ageing

   Författare :Cecilia Elam; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Stretch-shortening cycle peak muscle power; Physical performance; Ageing; Physiotherapy; Functional capacity;

   Sammanfattning : Ageing is associated with a gradual decline in physical function due to age-related loss of muscle mass, strength, and muscle power, leading to loss of independence. Physical therapists employ various tests to assess of physical functional performance, postural control, and muscle strength. LÄS MER

5. 9. Effects of ageing on contractility and myosin composition of rat and man skeletal muscles and muscle cells : with special reference to muscle adaptability

   Författare :Xiaopeng Li; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :ageing; hyperthyroidism; skeletal muscle; single skinned fibre; isometric twitch; slack test; shortening velociy; electrophoresis; myosin isoform; immunocytochemistry;

   Sammanfattning : The aims of this thesis were to characterize the effects of ageing on the contractile and biochemical properties of fast- and slow-twitch skeletal muscles at the whole muscle and single fibre level in an attempt to improve our understanding of the mechanisms underlying the age-related impairments of muscle fibres. Specific interest was in the adaptability of skeletal muscle and the regulation of speed of shortening at single-cell level in the rat and man. LÄS MER

7. 10. Superimposition of Contractional Structures in Models and Nature

   Författare :Hongling Deng; Hemin Koyi; Sudipta Sengupta; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; superimposition; progressive deformation; multiple phases; coaxial; non-coaxial; analogue modelling; fold-and-thrust belts; Geovetenskap med inriktning mot mineralogi; petrologi och tektonik; Earth Science with specialization in Mineral Chemistry; Petrology and Tectonics;

   Sammanfattning : Superimposition of contractional structures is widely observed in different scales in the world. Superimposed structures form due to different processes: change in strain accommodation from one type of structure to another during a single progressive shortening; successive coaxial shortening phases separated by an unconformity; superimposition of different non-coaxial shortening phases. LÄS MER