A 42-year-old male with a history of multiple shoulder dislocations presented to the emergency department via emergency medical services with both arms locked above his head, stating that he had been jumped at a bar and had since been unable to move his arms. A single anteroposterior chest radiograph (Figure) demonstrates bilateral inferior shoulder dislocations. The humeral head (white arrow) ...

The principal effects of plastic deformation on the low-temperature conductivity of alkali halide crystals are summarised and interpreted as follows : 1. The high conductivity during deformation is due to the movement of charged dislocations under the forces exerted simultaneously by the stress and the applied electric field. 2. The increased conductivity following deformation which subsequentl...

Shoulder dislocations are a common condition seen by orthopedic surgeons and emergency medicine physicians. Shoulder dislocations typically present unilaterally and are anterior in nature. Bilateral simultaneous posterior shoulder dislocations are typically associated with seizure or electrocution and are more common than bilateral simultaneous anterior dislocations, which occur because of trau...

Of 54 patients with posterior dislocations of the hip of type I and type II (Stewart and Milford 1954), 47 were followed for a mean period of 6.7 years (2 to 11). Of these, 23 had dislocation with minimal lesions of the acetabulum (type I) and 24 had an avulsed dorsocranial fragment (type II). All were reduced by closed methods within six hours. The subsequent treatment of type I dislocations w...

Dislocations are very frequent in adult French across dialects, and can affect not only subjects, but any sentence constituent. In the speech of children, dislocations appear very early on, and they are frequent from the start (see (3)-(5)). The rationale behind this investigation is that the pervasive nature of early dislocations must reflect a relative syntactic simplicity: at any one time in...

725 Abstract—Infrared transmission images from GaAs semi insulating wafers were considered for years as directly related to the quantum absorption by electrons on fundamental states of deep centers, especially EL2. The satisfying correspondence of these images with the dislocations revealed by etching or X ray topography or infrared tomography led to the opinion that a strong concentration of E...

Atomic-level defects such as dislocations play key roles in determining the macroscopic properties of crystalline materials. Their effects range from increased chemical reactivity to enhanced mechanical properties. Dislocations have been widely studied using traditional techniques such as X-ray diffraction and optical imaging. Recent advances have enabled atomic force microscopy to study single...

INTRODUCTION Sternoclavicular dislocations are difficult to diagnose and often missed. Anterior dislocations are more common than posterior dislocations and typically have a low risk of complications. PRESENTATION OF CASE We report the third case of post-traumatic superior sternoclavicular dislocation, which was successfully treated by functional treatment. DISCUSSION The sternoclavicular j...

Nanoindentation and nanoscratching of an indium phosphide (InP) semiconductor surface was investigated via contact mechanics. Plastic deformation in InP is known to be caused by the nucleation, propagation, and multiplication of dislocations. Using selective electrochemical dissolution, which reveals dislocations at the semiconductor surface, the load needed to create the first dislocations in ...

Nanoindentation and nanoscratching of an indium phosphide (InP) semiconductor surface was investigated via contact mechanics. Plastic deformation in InP is known to be caused by the nucleation, propagation, and multiplication of dislocations. Using selective electrochemical dissolution, which reveals dislocations at the semiconductor surface, the load needed to create the first dislocations in ...