Large-scale longwall mining of shallow coal seams may cause mining-induced fractures that can project completely through to the surface. This could lead to a series of mine safety and environmental issues, further deteriorating the already fragile ecological environment in the Western mining areas in China. Therefore, an accurate and effective understanding of the spatiotemporal evolution law o...

PURPOSE To investigate the association between glucocorticoid-induced osteoporosis and myasthenia gravis (MG) using a cross-sectional survey in Japan. METHODS We studied 363 patients with MG (female 68%; mean age, 57 ± 16 years) who were followed at six Japanese centers between April and July 2012. We evaluated the clinical information of MG and fractures, bone markers, and radiological asses...

Background Prior osteoporotic fractures are strongly associated with the subsequent fractures. To prevent this, the diagnosis of osteoporosis following an osteoporotic fracture is important. The measurement of bone mineral density (BMD) is the first step for the diagnosis and management of osteoporosis. Therefore, the purposes of this study are 1) to evaluate the rate of BMD measurement after o...

In recent years, infill horizontal well technology has been used to develop oil and gas in the remaining areas of unconventional low-permeability reservoirs. However, initial fractures parent wells will affect hydraulic formed by fracturing infilling wells. The interaction mechanisms between artificial are still unclear. Combined with boundary element method maximum circumferential tensile stre...

Multi-stage hydraulic fracturing of horizontal wells is the main stimulation method in recovering gas from tight shale gas reservoirs, and stage spacing determination is one of the key issues in fracturing design. The initiation and propagation of hydraulic fractures will cause stress redistribution and may activate natural fractures in the reservoir. Due to the limitation of the analytical met...

introduction: restoration of normal anatomic alignment is a key component of the treatment of distal radius fractures (drf). this study aimed to evaluate the accuracy of ultrasonography (us) in determining the adequacy of closed reduction in these fractures. methods : drf patients admitted to the emergency department of al-zahra hospital, isfahan, iran from september 2011 to 2012, were enrolled...

Friction-permeability response of rock fractures is a fundamental issue in developing geo-energy extraction and storage. This review aims to summarize promote our understanding friction-permeability relationships for inspire us create robust solutions engineering puzzles. From perspective laboratory experiments, we the common methods provide state-of-the-art discussions on frictional instabilit...

BACKGROUND An alleged association of chronic use of thiazide diuretics with an increased risk of bone fragility fractures has been highlighted by a relatively recent prospective cohort study. However, the concept that thiazides exert a beneficial effect on osteoporosis is still a predominant view. This effect would be mediated by the decrease in renal clearance of calcium ions, a pharmacologica...