Search for dissertations about: "threshold values"

Showing result 11 - 15 of 128 swedish dissertations containing the words threshold values.

  2. 11. Threshold and Temperature Characteristics of InGa(N)As-GaAs Multiple Quantum Well Lasers

    Author : Göran Adolfsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GaAs; Semiconductor lasers; molecular beam epitaxy; multiple quantum wells; characteristic temperature; temperature dependence; dilute nitrides; ambipolar diffusion; InGa N As;

    Abstract : Semiconductor lasers emitting in the 1.3 μm regime are of interest for applications in access-networks like fiber-to-the-home and radio-over-fiber systems. Suchfiber optical networks are expected to replace the copper-based access-networks currently in use due to a continuously increasing demand on user bandwidth. READ MORE

  4. 12. A Fault Detection Framework Using Recurrent Neural Networks for Condition Monitoring of Wind Turbines

    Author : Yue Cui; Lina Bertling; Pramod Bangalore; Bikash C Pal; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asset management; condition monitoring; fault detection; preventive maintenance; recurrent neural networks; two-stage threshold; wind power; kapitalförvaltning; underhållsstyrning; tillståndsövervakning; feldetektering; förebyggande underhåll; återkommande neurala nätverk; tvåstegs tröskel; vindkraft; Electrical Engineering; Elektro- och systemteknik;

    Abstract : The global energy system is experiencing a transition to a sustainable system with ambitious targets for increased use of renewable energy. One key trend for this transition has been the large introduction of wind power and integration into the electricity grid. READ MORE

  5. 13. Spectroscopy of Stable and Radioactive Negative Ions

    Author : Annie Ringvall-Moberg; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic Physics; ISOLDE; CERN; Electron Correlation; Electron Affinity; Photodetachment; Negative Ions; Anions; Radioisotopes; Laser Photodetachment Spectroscopy; Resonance Ionization; Neutral Particle Detection; Wigner Threshold Law; Molecular Dissociation; RFQcb; DESIREE; Radiative Lifetimes;

    Abstract : Negative ions are unique quantum systems which are of fundamental interest within the field of atomic physics due to the importance of the electron correlation in their creation, stability, and existence. Properties of these ions, such as the electron affinity, i.e. READ MORE

  6. 14. Pedicled and free TRAM flaps in breast reconstructions : a comparative study

    Author : Åsa Edsander-Nord; Karolinska Institutet; Karolinska Institutet; []
    Keywords : breast reconstruction; TRAM; pedicled flap; free flap; microdialysis; monitoring; flap circulation; flap metabolism; glucose; lactate; glycerol; abdominal muscles; trunk muscle strength; KIN-COM; quantitative sensory testing; tactile perception threshold; thermal perception threshold; breast volume; thermoplastic; quality of life; SF-36; esthetic evaluation; applanation tonometry;

    Abstract : The transverse rectus abdominis musculocutaneous (TRAM) flap is frequently used when autologous tissue is desired for breast reconstruction, and it can be transferred pedicled or free. The pedicled TRAM flap is elevated as a lower transverse abdominal flap with the rectus abdominis muscle attached in the epigastric area, by which means the deep superior epigastric vessels nourish the flap. READ MORE

  7. 15. Masseter muscle pain and its relation to pain mediators in fibromyalgia and local myalgia

    Author : Britt Hedenberg-Magnusson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Fibromyalgia; glucocorticoid; intramuscular temperature; isometric contraction; leukotriene B4; masseter muscle; microdialysis; myalgia; neuropeptide Y; pressure pain threshold; pressure pain tolerance level; prostaglandin E2; trapezius muscle; temporomandibular disorders; questionnaire; visual analogue pain scale.;

    Abstract : The aim of this investigation was to study chronic jaw muscle pain in fibromyalgia, local myalgia and healthy individuals in relation to the pain mediators PGE2, LTB4 and NPY and to study the effects of glucocorticoid administration and repetitive isometric contraction. A questionnaire showed presence of symptoms from the temporomandibular region in almost all fibromyalgia patients and the local pain was correlated to the general pain but on a lower level. READ MORE