The purpose of this work was to generate a data base of mechanical and fracture properties data for single crystal GaAs to be used in the design of reiiable GaA_ solar cells and modules. This report contains results of this test program inc uding _ysical property characterization, fracture behavior evaluation and the strength of cells determined as a function of cell processing and material par...

BACKGROUND Remote ballistic femoral fractures are rare fractures reported in the literature but still debated as to their existence and, indeed, their treatment. This study aimed to prove their existence, understand how they occur and determine which ammunition provides the greatest threat. In addition, fracture patterns, soft tissue disruption and contamination were assessed to aid in treatmen...

Un patient de 22 ans se présente aux urgences pour une impotence fonctionnelle douloureuse et immédiate du pied gauche suite à un accident de la voie publique. L'examen clinique montre une vive douleur du tiers inférieur de la jambe, avec une cheville oedématiée sans ouverture cutanée. Les diagnostics à évoquer sont une fracture bimalléolaire ou une fracture du quart distale de jambe. Le bilan ...

Consisting of stretchable and flexible cell walls or ligaments, soft elastic foams exhibit extremely high fracture toughness. Using the analogy between the cellular structure and the network structure of rubbery polymers, this paper proposes a scaling law for the fracture energy of soft elastic foam. To verify the scaling law, a phase-field model for the fracture processes in soft elastic struc...

Bedrock fracture systems facilitate weathering, allowing fresh mineral surfaces to interact with corrosive waters and biota from Earth's surface, while simultaneously promoting drainage of chemically equilibrated fluids. We show that topographic perturbations to regional stress fields explain bedrock fracture distributions, as revealed by seismic velocity and electrical resistivity surveys from...

Mallet fingers with an avulsion fracture of the distal phalanx or rupture of the terminal tendon of the extensor mechanism is known as a common injury, while mallet thumb is very rare. In this paper, the case of a 19-year-old woman with a sprained left thumb sustained while playing basketball is presented. Plain radiographs and computed tomography revealed an avulsion fracture involving more th...

Objective: The authors report a rare case of uterine adenocarcinoma metastasis to both the skull base and cervical spine presenting with pathological fracture and myelopathy. Methods: We report the case of a 43-year-old Asian female with widely metastatic uterine adenocarcinoma who over the course of 3 years was diagnosed with a large clival mass and more recently a cervical spine pathological ...

A 45-year-old male was autopsied. He had fallen backwards from a two-stairs height to the ground and passed away. A skull fracture was detected in the left occipital area, extending up to the left side of the skull base. The patient's death occurred due to the very low thickness of the calvarial bones, which led to the aforementioned fracture, and in turn resulted in subarachnoid hemorrhage and...

Stress is a proximal interphalangeal (PIP) joint model was analyzed by the two-dimensional and three-dimensional finite element methods (FEM) to study the onset mechanisms of the middle phalangeal base fracture. The structural shapes were obtained from sagittally sectioned specimens of the PIP joint for making FEM models. In those models, four different material properties were given correspond...

STUDY HYPOTHESIS Information on the influence of the mass of the helmet on the pattern of head injuries suffered by motorcyclists involved in collisions is scarce. This study was undertaken to verify a possible connection between the weight of the helmet worn and the occurrence of a ring fracture of the base of the skull surrounding the foramen magnum. DESIGN One hundred twenty-two fatally in...