Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 49 for “"Low resistivity"”.
-
Induction Heating of Aluminum Cookware
… difficulty is encountered when trying to head low-resistivity, non-ferromagnetic metals such as aluminum and copper, which are commonly used for cookware in several societies. The lack of ferromagnetic properties, resulting in no hysteresis dissipation, and low resistivity of such metals …
-
Imaging in karst terrain using the Electrical Resistivity Tomography (ERT) and Multi-Channel Analysis of Surface Waves (MASW) methods
<p>"Electrical Resistivity Tomography (ERT) and Multi-channel Analysis of Surface Waves (MASW) methods were used to image the subsurface in karst terrain in the southeast of Missouri. A SuperSting R8 system was used to acquire the ERT profiles; a multi-channel engineering seismograph was used to …
-
RESISTIVITY IMAGING OF PROMINENT SEEPAGE PATHWAYS IN KARST TERRAIN
… Greene County, southwestern Missouri. Electrical resistivity tomography (ERT) was employed to image anomalously low resistivity zones associated with the presence of seepage pathways that were anthropogenic and/or natural in origin. Techniques including visual inspection (VI), multichannel …
-
GIS-based spatial analysis coupled with geophysical imaging to identify and evaluate factors that control the formation of karst sinkholes in southwestern Missouri
… by a linear, visually prominent zones of low resistivity. The relatively low resistivity values are attributed to vertical seepage and the associated piping of fine-grained soils through preexisting fractures (often widened by solutioning)"--Abstract, page iv.</p>
-
The manufacture and commercial applications of metastannic acid and of tin dioxide based semiconducting materials
… route for the large scale manufacture of low resistivity indium tin oxide. Extensive experimental trials resulted in the consistent production of a low resistivity material prepared from the thermal decomposition of indium tin benzoate. Other areas of research covered in this project were, …
-
Electrical resistivity and ground-penetrating radar as tools to characterize groundwater surface water interaction at Mirror Lake, NH
The results of electrical resistivity surveys using both surface-towed and stationary (lake bottom) cables at Mirror Lake, NH suggested that resistivity surveying can be useful for characterizing geologic heterogeneities that control groundwater-surface water interaction, as well as for imaging …
-
Heated atomic force microscope cantilever with high resistivity and improved temperature sensitivity for nanotopography sensing
… with an atomic force microscope using a high-resistivity (HR) heated cantilever and a previously studied low-resistivity (LR) heated cantilever, with respective heater doping concentrations of 1 x 10^16 cm^-3 and 3 x 10^17 cm^-3. The HR cantilever temperature sensitivity on a 100 nm tall …
-
A study of copper diffusion through Pd₂Si thin films
… unless an alternative for aluminium is found the resistivity of the metal interconnects will soon limit device performance. Copper, with its low resistivity and greater resistance to electromigration is one of the obvious substitutes. However, before aluminium can be replaced by copper, a careful …
-
Fabrication of Zinc Nitride Thin Films using RF Magnetron Sputtering Deposition for Optoelectronic Applications
… a small optical band gap with direct transition, low resistivity, high mobility and carrier concentration. Therefore, it may be suitable as an optoelectronic material for infrared sensors, smart windows and energy conversion devices. The objective of this work is to grow zinc nitride thin films …
-
Cobalt silicide characterization
… sheet resistance on poly-silicon lines and shallow junctions. The mostly widely accepted silicide process, Titanium Silicide (TiSi2), was adopted because of its low resistivity. Major limitations of TiSi2 include an inability to form on narrow poly-lines and gate shorting. Cobalt silicide is an …
-
Examining Pathways for Water Loss from Mountain Lake, Giles County, Virginia
… that the main cause of water loss is outflow to groundwater. However, the flow paths of water exiting the lake are unknown. This study applied hydrologic, geophysical, and dye tracer methods to examine the pathways for water loss and the possible geologic controls on these flow paths. …
-
Resistivity Survey to Identify Archaeological Features at the Nathan Boone Homestead State Historic Site
… helps solve that problem by using electrical resistivity surveys to identify sub-surface archaeological deposits in the cabin area at the NBHSHS. To delineate subsurface deposits, I used two different electrical resistivity methods. First, a Geoscan RM15 resistivity meter was used to survey …
-
Fluctuations in resistivity in the Tuscaloosa Marine Shale, southwest Mississippi and southeast Louisiana
… of the shale where a continuous increase in resistivity greater than 5 Ohmm can be observed. This increase was originally attributed solely to the generation of hydrocarbons from the organic matter contained within the shale, with the presence of the oil and gas impeding the flow of electrons …
-
Hydrogeologic Controls on Lake Level at Mountain Lake, Virginia
… contacts between three upper Ordovician and lower Silurian formations, the lake is one of two natural lakes in Virginia. A daily water balance, geophysical surveying with dipole-dipole electrical resistivity, and chemical sampling have shed light on the nature of flow to and from the lake, …
-
Electrodeposition of Epitaxial Wide Bandgap P-Type Semiconductors and Copper Metal for Energy Conversion and Flexible Electronics
<p>"Epitaxial electrodeposition is a simple, low-cost technology to produce highly ordered materials on single-crystal surfaces. This research focuses on the epitaxial electrodeposition of wide bandgap p-type semiconductors and epitaxial Cu thin films via a self-assembled monolayer for energy …
-
New precursors and chemistry for the growth of transition metal films by atomic layer deposition
… ionizations with carbon concentrations below the detection limit after argon ion sputtering. Due to preferential nitrogen sputtering in XPS, Rutherford backscattering spectrometry (RBS) and nuclear reaction analysis (NRA) were performed and subsequently revealed Ni:N ratios between 2-4 for …
-
Delineating Wastewater Contaminant Plumes from On-Site Wastewater Treatment Systems in the North Carolina Coastal Plain using Electromagnetic Induction
… to monitor these systems. One technique, low-induction number (LIN) electromagnetic induction (EMI), could provide a means to quickly monitor these systems without intruding the ground surface. Studies employing LIN EMI show that this technique can track wastewater-impacted groundwater in …
-
Electrical Resistivity Tomography (ERT) and electromagnetic (CMD) assessment of Scottish reservoir embankments
… erosion and cracking. These investigations allow greater learning about the soil layers and detection of metallic objects in the ground, animal burials and the vertical fissuring network which are other factors of weakness. The data can also be used to identify high and low conductivity areas …
-
A geophysical characterization of New River terrace deposits in Giles County, Virginia
… meters/second, while apparent electrical resistivity values vary from 300-2000 ohm-meters. A 75 meter wide, east-west trending low resistivity zone extending across the center of the study area is juxtaposed against an extremely high resistivity zone which is present to the north. The …
-
Geomagnetic variations in the Northwest Atlantic : implications for the electrical resistivity of the oceanic lithosphere
… revealed the presence of at least one layer of low electrical resistivity. The low resistivity layer of approximately 10 ohm-m has been found at three widely spaced seafloor sites with crustal ages of 85, 110 and 150 million years. There is also evidence that the resistivity increases to greater …
Page 1 of 3