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.
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Showing 1 to 13 of 13 for “"open fractures"”.
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Plugging performance of preformed particle gels in fractures and its influencing factors
… applied to combat the water channeling caused by fractures or fracture-like channels. Understanding the placement and plugging of PPG in fractures is crucial for gel treatment design. The objective of the dissertation is to explore the plugging performance of three PPG products in two types of …
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Intramedullary nailing of open tibia and femur fractures through the supra & infrapatellar approach. Is septic arthritis a real concern?
… this risk increases notably in cases involving open fractures, as all associated wounds are deemed contaminated. Consequently, the potential introduction of infection into the knee joint consistently remains a concern for the surgeon performing these procedures. Methods: All instances of open …
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Relationship Between Fault Zone Architecture and Groundwater Compartmentalization in the East Tintic Mining District, Utah
… fault is an extensive network of interconnected open fractures and fault intersections that provide conduits for groundwater flow in otherwise impermeable units. The fault core breccia has been re-cemented and mineralized, which eliminates porosity in the rock by creating a thick impermeable …
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Outcomes after percutaneous leverage reduction and pinning for irreducible metaphyseal fractures of distal radius in children
BACKGROUND: Irreducible metaphyseal fractures of distal radius in children have been treated by open reduction. The authors have used percutaneous leverage reduction with a small osteotome and fixed with percutaneous pinning to treat irreducible fractures. HYPOTHESIS: Percutaneous leverage …
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Ground penetrating radar investigations in Upper Kama potash mines
… state of the rock mass surrounding underground openings in the potash mines is critically important for safe mining, planning the methods of extraction of an orebody, and preventing the influx of ground water. Continuous common offset ground penetrating radar (GPR) data were acquired in the …
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Numerical simulation study of gel treatment for conformance control from lab to field
… method was built to simulate gel extrusion in open fractures, which can consider the effect of dehydration. A decision tree model was built to present a roadmap that could be used to identify where and when gel treatment was more effective”--Abstract, page iv.</p>
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Multiscale determination of in situ stress and fracture properties in reservoirs
… of SHmax determines the preferred orientation of open fractures. Surface seismic reflection data provide the means for detecting the fractures.
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Characterization of prokaryotic diversity in a chlorinated solvent-contaminated bedrock aquifer using denaturing gradient gel electrophoresis, ribosomal DNA sequencing, and real time PCR
… that was associated with the core, (2) open fractures and (3) partially mineralized sealed fractures (PMSF) exposed by striking the core with a surface-sterilized geology hammer. DNA representing the attached and unattached microbial communities was extracted from these samples, and the …
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Structural and stratigraphic controls on fracture distribution within sand bodies of the Upper Iles and Lower Williams Fork formations, Mamm Creek and Divide Creek fields, Piceance Basin, Colorado
… of hydrocarbons requires the presence of fractures, either natural fractures or induced fractures from hydraulic stimulation. Natural fractures have been documented to significantly enhance reservoir permeability. This thesis examines the stratigraphic and structural controls on fracture …
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Soft tissue Reconstruction of Gustilo-Anderson Grade IIIB Open Extra-Articular Tibial Fractures at a Tertiary Hospital in Cape Town, South Africa: A Retrospective Case Series
… Management of Gustilo-Anderson grade 3b tibia fractures are challenging due to the high rate of complications which includes infection, nonunion and possible amputation. Due to limited soft tissue coverage of the tibia antero-medially, open fractures remain a treatment challenge. Despite many …
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Train accidents: orthopaedic injury and management at Groote Schuur Hospital, Cape Town, South Africa
… 1.74 body parts. Thirty-five patients sustained open fractures (38%). Non- operative management was undertaken in 32% of patients. Operative management took place in 68% of patients. A total of 61 patients had surgery for orthopaedic injuries. Each patient underwent on average 2.38 operations. …
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Simulating and diagnosing three-dimensional multistage hydraulic fracturing with the generalized finite element method
… In order to reduce operational costs, hydraulic fractures are usually created in stages (or clusters) where multiple fractures are propagated at the same time. It is estimated, however, that the majority of the production comes from only 20 to 30% of these clusters. It is known that tortuosity of …
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Crustal heterogeneities and complexities of fault processes
… the observed offset of secondary surface fractures with respect to the strike direction of the seismic fault. The results of this model also suggest that further fractures can develop in the opposite quadrant and so a second model describing fault branching in the upper layer is proposed. …