Sökning: "Primary Frequency Control"

Visar resultat 16 - 20 av 130 avhandlingar innehållade orden Primary Frequency Control.

1. 16. The Force of Blood : Epidemiological studies of blood pressure in stroke, atrial fibrillation and primary care

   Författare :Johan-Emil Bager; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; epidemiology; blood pressure; hypertension; stroke; myocardial infarction; atrial fibrillation; anticoagulants; LDL cholesterol; primary health care;

   Sammanfattning : Aim: The overarching aim of this thesis was to investigate the prevalence, temporal trends and associations to cardiovascular outcomes of blood pressure levels in patients in Västra Götaland. Methods and findings: In Study I, Cox regression analysis was used to investigate associations between blood pressure and mortality in 799 patients with acute ischemic stroke who were identified in the quality register of a stroke ward at Sahlgrenska University Hospital. LÄS MER

3. 17. On Reverberation Enhancement in Auditoria

   Författare :Peter Svensson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active sound field control; room acoustics; reverberation enhancement; listening tests; subjective effects; sound-reinforcement; feedback systems; feedback control; computer modelling of acoustics in enclosures; modulation; electro acoustics; time-varying filters;

   Sammanfattning : The analysis of electroacoustic systems for reverberation enhancement in auditoria is the topic of this thesis. Such systems have been developed since the 50's and been commercially available since then as well. During the 80's several new system ideas have been presented but there are still some open questions that are addressed here. LÄS MER

4. 18. Dynamic Processes and Active Power Control of Hydropower Plants

   Författare :Weijia Yang; Per Norrlund; Torbjørn Kristian Nielsen; Uppsala universitet; []
   Nyckelord :Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Hydro-electricity plays an important role in the safe, stable and efficient operation of electric power systems. Frequency stability of power systems refers to the ability to maintain steady frequency following a severe system upset resulting in a significant imbalance between generation and load. LÄS MER

5. 19. Noise and Vibration Control of Combustion Engine Vehicles

   Författare :Mathias Winberg; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Noise and vibrations have over the last two decades been regarded as significant environmental health problems. Regulations regarding acoustic as well as vibration levels have therefore become more stringent. LÄS MER

7. 20. Att förstå patienters bristande deltagande i individualiserat rehabiliteringsprogram

   Författare :Lena Oldfors Engström; Birgitta Öberg; Gunnevi Sundelin; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Adherence; Compliance; Gender perspective; Health-care provider patient relationship; Physiotherapy; Longstanding pain; Primary health care; Health Locus of Control; Health Belief; Patient perspective; Qualitative inquiry; Physiotherapy; Sjukgymnastik fysioterapi;

   Sammanfattning : The aim of this investigation was to elucidate and describe those patients who had discontinued their participation and/or paticipated infrequently in physiotherapy treatment based on their own activity and responsibility. The ambition was to understand the phenomenon of compliance/adherence from various perspectives in behavioural as well as social science. LÄS MER