Sökning: "Attenuation coefficient"
Visar resultat 11 - 15 av 23 uppsatser innehållade orden Attenuation coefficient.
11. Cs-137 i Svamp : Dataanalysrutiner för gammaspektroskopi
Kandidat-uppsats, Uppsala universitet/Tillämpad kärnfysikSammanfattning : Kärnkraftsolyckan i Tjernobyl ledde till en spridning av radioaktiva ämnen över Europa och Sverige. År 2018 är det 32 år sedan kärnkraftsolyckan ägde rum och den enda radioaktiva isotopen som finns kvar i det svenska ekosystemet som följd av olyckan i en betydande mängd är Cs-137, på grund av dess 30-åriga halveringstid. LÄS MER
12. Development of narrow-bandwidth filters for the suppression of scattered light for optical and ultrasound analysis of tissue
Magister-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionenSammanfattning : Ultrasound-modulated optical tomography (UOT) is a proposed diagnostic technique with potential as a means of discovering cancerous tumours. The technique combines ultrasound and laser radiation to probe tissue in a non-invasive, harmless way. LÄS MER
13. Material Identification using Multiple X-Ray Absorptiometry
Master-uppsats, KTH/Numerisk analys, NASammanfattning : Dual Energy X-ray Absorptiometry is a proven technique used to identify unknown materials, by measuring the transmission of two X-ray energies. This technique is limited to measuring a single chemical quantity and is not able to handle more chemical variation. To overcome this, one approach is to use multiple-energies to resolve more information. LÄS MER
14. Posidonia Oceanica habitat mapping in shallow coastal waters along Losinj Island, Croatia using Geoeye-1 multispectral imagery
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : Seagrasses are important components of marine ecosystem. They are a primary food source for many organisms and provide shelter and nursery areas for many more. Also they stabilize sediments and act as a natural barrier against coastal erosion. But despite their valuable rule, Seagrasses are facing large threats because of human development. LÄS MER
15. Automatic Segmentation of Skeleton in Whole-Body MR Images
Uppsats för yrkesexamina på avancerad nivå, Institutionen för informationsteknologiSammanfattning : Magnetic Resonance Imaging(MRI) has developed as a widespread technique to examine various body parts and diagnose a wide range of diseases. MRI can often be superior to other imaging techniques such as Computed Tomography(CT) since it does not use ionizing radiation and can give a clearer image of soft tissue. LÄS MER