Sökning: "Capacity bound"

Visar resultat 21 - 25 av 167 avhandlingar innehållade orden Capacity bound.

1. 21. Expression and regulation of water channels and ion transporters : ontogenic aspects

   Författare :Masato Yasui; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :water balance; developmental gene expression regulation; gene transcription; fetal lung fluid; urinary concentrating capacity; hormonal regulation;

   Sammanfattning : The content and distribution of body water changes dramatically during the perinatal period and in infancy. Transport of water across the cell membrane occurs via diffusion and via specific water channels. Transport via water channels is fast and may be hormonally regulated. LÄS MER

3. 22. On Deterministic Models for Gaussian Networks

   Författare :Nicolas Schrammar; Mikael Skoglund; Petar Popovski; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : In this thesis we study wireless networks modeled by the additive white Gaussian noise (AWGN) model. The AWGN capacity region of most network topologies is unknown, which means that the optimal transmission scheme is unknown as well. This motivates the search for capacity approximations and for approximately optimal schemes. LÄS MER

4. 23. Amine oxidases in dental pulp : a study with special regard to a semicarbazide-sensitive amine oxidase with catalytic potency towards serotonin

   Författare :Astrid Norqvist-Sjöberg; Lars Oreland; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Sammanfattning : The amine oxidizing capacity of piglet dental pulp tissue has been investigated. At least six separate enzyme activities could be distinguished:- a soluble semicarbazide-sensitive (SSAO) activity towards benzylamine, most likely to be derived from the content of blood plasma within the pulp tissue;- a soluble pulp tissue SSAO activity with most properties in common with the plasma enzyme, however with great efficiency not only regarding benzylamine but also tryptamine;- a tissue bound SSAO activity with activity towards benzylamine, tryptamine, tyramine and ß-phenylethylamine;- a tissue bound semicarbazide-sensitive activity towards serotonin (SSA0-5HT) (a combination of properties never reported before);- a mitochondrially bound and clorgyline-sensitive monoamine oxidase-A (MAO-A) activity with activity towards serotonin;- a mitochondrially bound and deprenyl-sensitive MAO-B activity with activity towards e. LÄS MER

5. 24. Bounds on the maximum coding rate of multiple-access channels and feedback channels

   Författare :Rahul Devassy; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : We provide upper and lower bounds on the coding rate of multiple-access channels (MACs) and feedback channels.Traditional MACs have been extensively studied under the assumption of availability of perfect channel state information (CSI).In Paper A we relax this assumption for a Rayleigh block-fading MAC and provide bounds on the sum-rate capacity. LÄS MER

7. 25. Lead in blood. ICP-MS studies of lead in plasma, blood and erythrocyte proteins

   Författare :Ingvar A Bergdahl; Avdelningen för arbets- och miljömedicin; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; distribution; plasma; blood; erythrocytes; lead-binding prtoeins; delta-aminlevulinic acid dehydratase; inductively coupled plasma mass spectrometry; ALAD; arbetsmiljömedicin; Occupational health; industrial medicine; Lead; toxicity; ICP-MS; Yrkesmedicin;

   Sammanfattning : An inductively coupled plasma mass spectrometry (ICP-MS) method for the determination of lead in blood plasma has been developed. The detection limit was below 0.1 microgram/liter, and the precision 5%. There was no significant difference between levels in plasma and serum. LÄS MER