To investigate mechanism of hydrogen-induced intergranular fractures, low energy positron beams with different energies were applied to fracture surfaces 80Ni-20Cr alloy, and depth distributions the lattice defects evaluated by Doppler broadening spectroscopy annihilation lifetime one. At least at depths between 0.1 μm 1 from surface, a large number homogeneously distributed. Both dislocation d...

methods retrospective cohort study of blunt trauma patients with rib fractures at a level i trauma center that had both a cxr and a ct chest. the ct finding of ≥ 3 additional fractures in patients with ≤ 3 rib fractures on cxr was considered clinically meaningful. student’s t-test and chi-square analysis were used for comparison. results we identified 499 patients with rib fractures: 93 (18.6%)...

A 3D numerical model was presented to investigate the blast-induced damage characteristics of highly stressed rock mass. The RHT (Riedel, Hiermaier, and Thoma) in LS-DYNA used simulate its parameters were calibrated by a physical test. Based on model, influences confining pressure free surface span investigated. results show that under uniaxial loading, crater volume increases with increases. s...

In a low permeability formation, connectivity of natural and induced fractures determines overall hydraulic diffusivity in fluid flow through this formation defines effective rock permeability. Efficient evaluation fracture is nontrivial task. Here, we utilize topological concept global efficiency to evaluate connectivity. We address the impact key geometrical properties stochastic networks (fr...

conclusions although external fixation in open pediatric fractures and severe injuries is recommended, intramedullary nailing is also an effective method with low complications. combining pins and flexible intramedullary nails is effective in developing more stability and is not associated with more complications. background tibial fractures are the third most common pediatric long-bone fractur...

Abstract In the coupled electric interaction of rock fractures and gas invasion, that is, when gases interact with newly created crack surfaces, unpaired electrons within crystal defects are thermally stimulated, released into due to temperature rise at tip via plastic work, attached ambient molecules electrify them in a negative state. Using working hypothesis this mechanism is source seismo-e...

ABSTRACT BACKGROUND: Radiation-induced pathological fractures of the proximal femur are difficult to treat due frequent non-union and hardware failure using standard fracture fixation techniques. This case series investigates endoprosthetic replacement as a treatment option METHODS: A retrospective folder review from private hospital in Cape Town, patients who had sustained radiation-induced fr...

Abstract Background Tumor-induced osteomalacia (TIO) is a rare condition with fewer than 500 cases reported in the literature although described. Phosphaturic mesenchymal tumor (PMT) often unrecognized cause of hypophosphatemia. This case report aims to highlight such association which warrants clinical and radiologist attention. Case A 51-year-old man had pain his feet 2 years prior most recen...

Abstract The in situ stress state within fault zones is technically challenging to characterize. At the Bedretto Underground Laboratory Swiss Alps, breakouts observed an array of eight inclined boreholes penetrating a zone offer unique opportunity characterize fault‐associated spatial variations. Synthesizing multiple geophysical logs, natural geologic structures intersecting these are identifi...

conclusions although external fixation in open pediatric fractures and severe injuries is recommended, intramedullary nailing is also an effective method with low complications. combining pins and flexible intramedullary nails is effective in developing more stability and is not associated with more complications. background tibial fractures are the third most common pediatric long-bone fractur...