Search for dissertations about: "Q factors"

Showing result 1 - 5 of 108 swedish dissertations containing the words Q factors.

2. 1. Some Basic Problems in Rock Breakage by Blasting and by Indentation

   Author : S.Q. Kou; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

   Abstract : This thesis is devoted to discussing some basic problems in rock breakage by blasting and by mechanical excavation, and contains a detailed summary and six appended papers numbered as Papers A to F. The central problem treated in this thesis is the interaction between either explosion products or mechanical tools and rock. READ MORE

4. 2. Myocardial infarction personality factors, coping strategies, depression and secondary prevention

   Author : Mona Schlyter; Malmö högskola; []
   Keywords : Acute myocardial infarction; Personality factors; Coping strategies; depression; smoking cessation; Secondary prevention;

   Abstract : A longitudinal study with 400 patients diagnosed with myocardial infarction (MI) was conducted at the Cardiology department at Malmö University hospital in Sweden, between 2002 and 2005. The aim of the project was to identify personality and psychosocial factors, influencing patients’ actions and the prognoses after MI. READ MORE

5. 3. Investigating and Enhancing Performance of Multiple Antenna Systems in Compact MIMO/Diversity Terminals

   Author : Shuai Zhang; Sailing He; Raj Mittra; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple antennas; planar inverted-F antenna; mutual coupling; slot antenna; compact antenna; mobile antenna; Q factors; antenna array; ultra-wideband UWB antenna; pattern diversity; polarization diversity; user effects; adaptive arrays; chassis mode;

   Abstract : Today, owners of small communicating device are interested in transmitting or receiving various multimedia data. By increasing the number of antennas at the transmitter and/or the receiver side of the wireless link, the diversity/Multiple-Input Multiple-Output (MIMO) techniques can increase wireless channel capacity without the need for additional power or spectrum in rich scattering environments. READ MORE

6. 4. Diabetes mellitus and acute coronary syndromes. Prognosis and risk factors

   Author : Ann-Marie Svensson; Göteborgs universitet; []
   Keywords : diabetes; prognosis; hyperglycaemia; hypoglycaemia; risk-factors; morbidity; mortality; unstable coronary syndrome; unstable angina pectoris; acute myocardial infarction;

   Abstract : Aims: the aims of the thesis were: - To investigate the prognostic influence of diabetes on short- and long-term mortality after an episode of unstable coronary disease - To evaluate the association between glycometabolic parameters on admission and during hospitalization and the 2 year mortality risk among diabetic patients with unstable coronary disease - To investigate the influence of diabetes on treatment and outcome in patients with acute myocardial infarction (AMI) - To determine long-term morbidity and mortality after hospitalization for unstable coronary disease in patients with and without diabetes Diabetes was associated with higher mortality: We investigated an unselected series of 4,341 patients with unstable angina or non-Q-wave myocardial infarction, of which 722 (17%) had diabetes. Diabetes was associated with increased mortality during initial hospitalization (10. READ MORE

7. 5. Workload transitions and stress : changes over time

   Author : Erik Prytz; Mark Scerbo; USA VA Norfolk Old Dominion University Department of Psychology; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; human factors; workload transition; stress; workload;

   Abstract : Workload transitions are situations where operators are suddenly confronted with levels of workload substantially different from previously established levels. Workload transitions may affect the operators' state of stress and coping behaviors but previous research has not conclusively demonstrated the nature of those. READ MORE