Sökning: "berner"

Visar resultat 1 - 5 av 37 avhandlingar innehållade ordet berner.

  1. 1. The effect of forest nutrients status on ectomycorrhizal growth and community structure in response to minerals

    Författare :Christoffer Berner; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Ectomycorrhiza are a symbiosis between trees and soil inhabiting fungi. The fungal hyphae ensheath the fine roots creating a mantle and grow in between root cells to create the Hartig net, where the exchange of carbon and mineral nutrients occurs. The ectomycorrhizal fungus is dependent on the host tree to receive the carbon it needs to grow. LÄS MER

  3. 2. Automatic Controller Tuning using Relay-based Model Identification

    Författare :Josefin Berner; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Automatic tuning; Relay feedback; PID control; Model identification; Process control;

    Sammanfattning : Proportional-integral-derivative (PID) controllers are very common in the process industry. In a regular factory there may be hundreds or thousands of them in use. LÄS MER

  4. 3. Automatic Tuning of PID Controllers Based on Asymmetric Relay Feedback

    Författare :Josefin Berner; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis presents an improved version of the classic relay autotuner. The proposed autotuner uses an asymmetric relay function to better excite the process in the experiment phase. The improved excitation provides the possibility to obtain better models and hence better tuning, without making the autotuner more complicated or time consuming. LÄS MER

  5. 4. Psychosocial, Socio-Demographic and Health Determinants in Information Communication Technology Use by Older-Adults

    Författare :Jessica Berner; Blekinge Tekniska Högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Older-adults; Information communication technology; Gerontechnology; Healthy aging;

    Sammanfattning : The aim of the thesis was to investigate factors influencing ICT use by older-adults. A selection of psycho-social, socio-demographic and health determinants were investigated with Internet use. Data were collected through questionnaires (Studies I-III) and interviews (Study IV). LÄS MER

  7. 5. The role of substance P in respiratory control in the newborn : effects of morphine and nicotine

    Författare :Jonas Berner; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : We breathe in order to maintain oxygen, carbon dioxide and pH levels within the physiological range in response to the metabolic demands of the body. To achieve this, the respiratory control system is dependent on input from peripheral and/ central chemosensitive areas and on participation of different neuromodulator systems. LÄS MER