• 터널과지하공간
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• 제23권6호
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• pp.581-592
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• 2013

본 사례연구논문에서는 유럽에서의 지열에너지개발과 관련된 연구프로젝트의 현황에 대한 개괄적인 내용과, 저자가 참여했던 GEISER프로젝트(Geothermal Engineering Integrating Mitigation of Induced Seismicity in Reservoirs)와 핵심세부과제인 유도지진(Induced Seismicity)에 관한 연구결과를 요약 정리하였다. 본 사례연구 논문에서 다룬 GEISER프로젝트의 연구결과와 교훈을 통해 수리자극에 의한 지열저류층 개발과 그에 수반되는 유도지진에 따른 문제가 예상되는 향후 지열에너지개발 프로젝트에 도움이 될 수 있기를 기대한다.

• Coupled systems mechanics
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• 제1권4호
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• pp.325-343
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• 2012

We present different numerical methods for solving the shallow shelf equations with basal drag (SSAB). An alternative approach of splitting the SSAB equation into a Laplacian and diagonal shift operator is discussed with respect to the underlying eigenvalue problem. First, we solve the equations using standard methods. Then, the coupled equations are decomposed into operators for membranes stresses, basal shear stress and driving stress. Applying reasonable parameter values, we demonstrate that the operator of the membrane stresses is much stiffer than the operator of the basal shear stress. Here, we could apply a new splitting method, which alternates between the iteration on the membrane-stress operator and the basal-shear operator, with a more frequent iteration on the operator of the membrane stresses. We show that this splitting accelerates and stabilize the computational performance of the numerical method, although an appropriate choice of the standard method used to solve for all operators in one step speeds up the scheme as well.

• Journal of Trauma and Injury
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• 제32권1호
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• pp.51-59
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• 2019

Unstable pelvic ring lesions are usually treated with internal fixation. In patients presenting clinical instability or soft tissue complication risk, external fixation is a safe treatment option. However, pin tract infection, insufficient biomechanical properties, difficulty sitting and changing decubitus are important drawbacks related to the treatment. The present study reports the association of anterior and posterior subcutaneous internal fixation by applying spine-designed implants on the pelvic ring disruption: supra-acetabular pedicle screws with an interconnecting rod (Infix), plus posterior transiliac fixation with the same system, which the authors have named the "Hula Hoop Technique".