Sökning: "GPR"

Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet GPR.

1. 1. Spatial distribution of snow in Antarctica and other glacier studies using ground-penetrating radar

   Författare :Cecilia Richardson-Näslund; Robert W. Jacobel; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GPR; ground-penetrating radar; radar soundings; snow accumulation; accumulation rate; spatial variability; Antarctica; Dronning Maud Land; cold surface layer; thermal regime; glacial cirques; Sweden; Antarktis; Glaciärer; Ackumulering av snö; Geography; Physical Geography; geografi med naturgeografisk inriktning;

   Sammanfattning : The overall aim of this thesis is to develop and exemplify the use of ground-penetrating radar (GPR) within the field of glaciology. The main focus is on the spatial distribution of snow in Dronning Maud Land, East Antarctica. LÄS MER

3. 2. Genetic studies on childhood asthma and allergy : role of interactions

   Författare :Erik Melén; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Air pollution; asthma; allergy; BAMSE; child; environment; epistasis; GPR-A; genetics; haplotype; heredity; interaction; polymorphism; wheezing;

   Sammanfattning : The occurrence of asthma and allergic diseases is influenced by inherited and environmental factors, and symptoms of asthma and allergy usually begin in early childhood. The overall aim with this thesis was to study the role of genetic factors for the development of childhood asthma and allergy, and to evaluate potential interaction between genetic and environmental factors. LÄS MER

4. 3. Analysis of Resistor-Loaded Bow-Tie Antennas for Ground Penetrating Radar Applications

   Författare :Disala Uduwawala; KTH; []
   Nyckelord :Ground penetrating radar; Buried object detection; Simulation; Radar antennas; Radar signal processing; FDTD methods; Optimal design; Lossy media; Dispersive media; Clutter; Polarization;

   Sammanfattning : Ground penetrating radar (GPR) systems are increasinglybeing used for the detection and location of buried objectswithin the upper regions of the earth's surface. Numericalsimulation of such systems plays an important role in thedevelopment of GPR hardware and signal processingtechniques. LÄS MER

5. 4. Fault detection in water resource recovery facilities

   Författare :Oscar Samuelsson; Bengt Carlsson; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Sammanfattning : Reliable sensor values are important for resource-efficient control and operations of wastewater treatment processes. Automatic fault detection methods are necessary to monitor the increasing amount of data produced in any modern water resource recovery facility (WRRF). LÄS MER

7. 5. Integrated geophysical-geochemical methods for archaeological prospecting

   Författare :Kjell Persson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geophysics; geophysical; geochemical; prospecting; archaeology; electric; magnetometric; Geofysik; Geophysics; Geofysik;

   Sammanfattning : A great number of field measurements with different methods and instruments were conducted in attempts to develop a method for an optimal combination of various geochemical and geophysical methods in archaeological prospecting. The research presented in this thesis focuses on a study of how different anthropogenic changes in the ground can be detected by geochemical and geophysical mapping and how the results can be presented. LÄS MER