Search for dissertations about: "LED"

Showing result 11 - 15 of 3196 swedish dissertations containing the word LED.

  2. 11. Novel Processing and Electrical Characterization of Nanowires

    Author : Kristian Storm; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gate; Capacitance; Hall effect; InP; InAs; Characterization; Nanowires; Processing; LED; Transistor; Fysicumarkivet A:2013:Storm;

    Abstract : This thesis investigates novel electrical nanowire characterization tools and devices. Conventional characterization methods, long available to bulk semiconductor samples, have been adapted and transferred to the nanowire geometry. READ MORE

  4. 12. On voltage fluctuations in low voltage grids – characterization, propagation and impact on LED lamps

    Author : Elena Gutierrez Ballesteros; Sarah Rönnberg; Aurora Gil de Castro; Izaskun Azcarate; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; household devices; LED lamps; light flicker; low voltage grid; voltage fluctuations; Electric Power Engineering; Elkraftteknik;

    Abstract : The work presented focuses on voltage fluctuations produced by household devices and their impact on the light output of LED lamps. Voltage fluctuations can produce unsteadiness on the light intensity of the lamps, so-called light flicker. An observer may or may not experience light flicker, depending on e.g. READ MORE

  5. 13. Fluorescence as a biological feedback signal for energy optimising spectra for greenhouse LED-illumination

    Author : Linnéa Ahlman; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluorescence; Photosynthesis; Automatic control; Greenhouse illumination; LED lighting; Spectrum optimisation;

    Abstract : The introduction of LED-lighting for greenhouses has enabled new ways of controlling the light, both spectrum and intensity, to save energy and increase crop production. We have investigated a new method of automatically tuning the spectrum based on biological feedback. READ MORE

  6. 14. Modernisation and farmer-led irrigation development in Africa : A study of state-farmer interactions in Tanzania

    Author : Chris de Bont; Lowe Börjeson; Gert Jan Veldwisch; Mats Widgren; Anna Mdee; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; irrigation development; modernity; modernisation; farmer-led irrigation development; expert knowledge; Tanzania; sub-Saharan Africa; Geography with Emphasis on Human Geography; geografi med kulturgeografisk inriktning;

    Abstract : After years of relatively low investment, irrigation development in Africa has been put back on the policy agenda as a way of increasing agricultural productivity. In spite of existing evidence of farmers’ irrigation initiatives across the African continent, current policy prescriptions still revolve around (large-scale) state intervention. READ MORE

  7. 15. Registered nurse-led emergency department triage : organisation, allocation of acuity ratings and triage decision making

    Author : Katarina Göransson; Anna Ehrenberg; Margareta Ehnfors; Gun Nordström; Örebro universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Accuracy; Canadian Triage and Acuity Scale; concordance; decision making; emergency department; patient scenarios; registered nurses; survey; think aloud; triage; Caring sciences; Vårdvetenskap; Vårdvetenskap; Nursing Science;

    Abstract : Successful triage is the basis for sound emergency department (ED) care, whereas unsuccessful triage could result in adverse outcomes. ED triage is a rather unexplored area in the Swedish health care system. This thesis contributes to our understanding of this complex nursing task. READ MORE