evidence acquisition a search of pubmed for studies on proximal fifth metatarsal fracture and jones fracture focusing on the classification and management was performed. the reference list of the retrieved articles was searched for additional related studies. conclusions lawrence and botte’s classification of proximal fifth metatarsal fractures is recommended by experts, due to its implication ...

Hydraulic fracturing of coalbed methane wells has been widely practised as an effective method to increase drainage efficiency in low-permeability, low-pressure and low-saturated coal seams. To investigate hydraulic fracture performance associated seismic response coal, experiments were carried out on two cubic blocks containing a host natural fractures using true triaxial rock testing machine ...

We develop a fully-coupled hydro-mechanical model to simulate fluid injection-induced activation of pre-existing fractures, propagation new damages, development seismic activities, and alteration network connectivity in naturally fractured rocks. The natural fracture system is represented by discrete network. stress strain fields the porous media are solved framework finite element model, which...

Hydraulic fracturing is performed to enhance rock permeability, for example, in the frame of geothermal energy production or shale gas exploitation, and can potentially trigger induced seismicity. The tracking increased permeabilities extent often based on microseismic event distribution within stimulated volume, but it debated whether activity adequately depicts fracture formation. We are able...

Since hydraulic fractures exhibit a strong tendency to propagate in a plane normal to the least principal stress, the preferred plane of propagation under thrust stress regime (Sh > Sv) conditions is horizontal. This can lead to complications in applying the hydrofracture stress measurement technique as horizontal fractures do not directly sample the horizontal stress field. Recent experiences ...

BACKGROUND Previous studies regarding the mechanism by which balloon angioplasty increases luminal patency have generally used animal models or postmortem specimens from occasional fatal cases of angioplasty performed in human patients. In either case, conclusions regarding participatory mechanisms have relied exclusively on nonserial, postangioplasty histopathological examination. METHODS AN...

Coal permeability is related to the fracture-pore structure of coal and a key factor in determining gas drainage efficiency. The characteristics methane flow fractures are different from those matrix pores. However, due difficulty observing fast fractures, effect on has seldom been considered investigated. In this study, cylindrical sample used for measurement under pressures, an abrupt change ...

Active tectonic movement and frequent ground fissure disasters occur in the Kenya Rift Valley. Ground fissures are often exposed to surface after rainfall, resulting huge economic losses. We conducted a field geological survey exploratory trenching order identify developmental characteristics of The were found be connected with concealed bedrock fissures, which is typical characteristic fissure...

BACKGROUND It is controversial whether an early reduction and internal fixation can reduce the occurrence of femoral neck fracture-induced osteonecrosis of the femoral head (ONFH). This prospective study was designed to reflect the relationship between injury-to-surgery interval (ISI) and traumatic ONFH based on a canine model of femoral neck fractures. MATERIAL/METHODS Twenty-four dogs were ...

background: arterial damage is sometimes associated with supracondylar fractures of the humerus. diagnosis and careful management of the fracture and arterial repair is crucial. objectives: the aim of this study was to determine the prevalence and outcome of supracondylar fractures of the humerus with signs and symptoms of limb ischemia, before and after arterial decompression or arterial recon...