Search for dissertations about: "Long range hf"

Showing result 1 - 5 of 9 swedish dissertations containing the words Long range hf.

2. 1. Secondary Electromagnetic Radiation Generated by HF Pumping of the Ionosphere

   Author : Lars Norin; Bo Thidé; Savely M. Grach; Bengt Gustafsson; James W. LaBelle; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; space physics; ionospheric modification experiments; plasma turbulence; stimulated electromagnetic emission; ionospheric irregularities; radio waves; parametric processes; thermal parametric instability; transient dynamics; wave-wave interactions; Physics; Fysik;

   Abstract : Electromagnetic waves can be used to transmit information over long distances and are therefore often employed for communication purposes. The electromagnetic waves are reflected off material objects on their paths and interact with the medium through which they propagate. READ MORE

4. 2. Caring needs in patient-partner dyads affected by heart failure : An evaluation of the long-term effects of a dyadic psycho-educational intervention

   Author : Maria Liljeroos; Anna Strömberg; Tiny Jaarsma; Susanna Ågren; Gerd Ahlström; Linköpings universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heart failure; intervention; caregiver burden; partner; dyad; nursing; qualitative content analysis; caring needs;

   Abstract : Introduction: As medical treatment has improved, patients with heart failure (HF) now live longer and care mostly takes place at home with partners providing the main assistance. Taking care of an ill or disabled individual imposes a well-documented burden on the partner’s healthrelated quality of life. READ MORE

5. 3. Renal dysfunction in heart failure : insights on prevalence and prognosis

   Author : Ida Löfman; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Background: Kidney disease is common in heart failure (HF) and has been found to be associated with worse outcomes. The impact of different degrees of chronic kidney disease (CKD) in HF, as well as the link to, and impact of CKD in HF with reduced (HFrEF), the newly defined mid-range (HFmrEF) and preserved ejection fraction (HFpEF) have been uncertain. READ MORE

6. 4. On the tissue response to hafnium, titanium and thin calcium phosphate coatings

   Author : Sham Mohammadi; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; hafnium; titanium; calcium phosphates; hydroxyapatite; implants; bone; soft tissue; histomorphometry;

   Abstract : Background: Titanium (Ti) is the gold standard material for load-bearing implants. Although high success rates have been reported for Ti implants, failures do occur. Alternative materials/surface modifications might further improve the performances of Ti implants, particularly in situations with non-optimal local tissue conditions. READ MORE

7. 5. Lithium-ion Battery Safety - Assessment by Abuse Testing, Fluoride Gas Emissions and Fire Propagation

   Author : Carl Fredrik Larsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fire; thermal runaway; gas emission; gas explosion; propagation; safety; abuse testing; Lithium-ion; cell case explosion; hydrogen fluoride;

   Abstract : Lithium-ion batteries offer high energy and power densities as well as long life time but have a more narrow stability window compared to other battery types and contain reactive and flammable materials. In case of overheating the battery cell can release gas (vent) and, at temperatures of about 150-200 °C, a so called thermal runaway can occur, that is a rapid self-heated temperature increase which is typically accompanied with a large release of smoke and gas, fire and a potential cell case explosion or gas explosion. READ MORE