Results 251 to 260 of about 129,193 (316)
Deer antler polypeptides promote osteogenesis for fracture healing via activating neurosensory PGE2/EP4/p-CREB axis. [PDF]
J Orthop TranslatHe Y +8 more
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Development and Validation of an AI-Integrated System for Automated Fracture Detection and Pedicle Puncture Planning in Lumbar Osteoporotic Vertebral Compression Fractures Based on the Nine-Grid Area Division Method. [PDF]
Orthop SurgZuo W +12 more
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SPE EUROPEC/EAGE Annual Conference and Exhibition, 2011 Abstract The interaction between natural fractures and hydraulic fracture was observed in multiple naturally fractured blocks by a series of physical model tests. The effect of natural fractures and in-situ stress on fracture geometry was revealed. Three types of fracture geometry were observed due to a change of in-situ stress contrast.
Jian Zhou, Chengjin Xue
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Effect of a natural fracture on hydraulic fracture propagation
, 2004 The effect of an existing fracture in a naturally fractured formation on the extension of a hydraulically induced natural fracture has been studied. Fracture interaction criterion was presented and a numerical model was developed to predict the dynamic fracture dimensions based on PKN³¹ fracture mechanics.
Potluri, Naga Kiran
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On the nature of stress fractures
The American Journal of Sports Medicine, 1978It is felt that stress fractures are caused by excessive, repetitive muscle forces acting across the affected bone. These fractures should be suspected in participants of athletic endeavors who present with a history of persistent, focal, activity-related pain regardless of their stage of physical conditioning.
C L, Stanitski +2 more
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Hydraulic-Fracture Propagation in a Naturally Fractured Reservoir
SPE Production & Operations, 2010Summary We present the results of numerical modeling that quantify the physical mechanisms of mechanical activation of a natural fault because of contact with a pressurized hydraulic fracture (HF). We focus on three stages of interactions: HF approaching, contact, and subsequent infiltration of the fault.
D. A. Chuprakov +3 more
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Detection and Characterization of Fractures in Naturally Fractured Reservoirs
Proceedings of SPE Annual Technical Conference and Exhibition, 2000Abstract Imaging log, sonic log, optical microscopy, NMR, MRI, and tomography have greatly enhanced the possibility of measuring fracture geometric characteristics. However, the fracture hydraulic width and permeability can only be evaluated from dynamic data revealing production or adsorption along the wellbore.
VERGA, FRANCESCA +4 more
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Journal of Natural Gas Science and Engineering, 2015
Abstract Hydraulic fracturing technique has been commonly used in the development of shale reservoir aiming to produce from complex network of fractures. One of the key parameters that affects the hydraulic fracture complexity is the natural fracture in the shale reservoir.
Wan Cheng, Yan Jin, Mian Chen
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Abstract Hydraulic fracturing technique has been commonly used in the development of shale reservoir aiming to produce from complex network of fractures. One of the key parameters that affects the hydraulic fracture complexity is the natural fracture in the shale reservoir.
Wan Cheng, Yan Jin, Mian Chen
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Sternal fractures — The natural history
Annals of Emergency Medicine, 1988A five-year retrospective study was undertaken to analyze the natural history of sternal fractures and to scrutinize the current method of management. Sixty-six patients with documented sternal fractures were evaluated. The most common mechanism of injury was motor vehicle accidents (59%). Most of these victims did not wear seat belts.
J B, Wojcik, A S, Morgan
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