the aim of this article is study of tool plunge depth (tpd) effects on mechanical properties of friction stir welding of aa1100 aluminium alloy to a441 aisi steel. for this purpose the 0.1, 0.2, 0.4, and 0.6 mm tpd selected and other welding parameters kept constant. the results shows that the frictional heat increases and stir zone grain size decreases with increasing tpd at both base metals. ...

The purpose of this study was to characterize both spatial and temporal patterns of the shoulder joint movement in the upper limb motion when ballet dancers are performing the flaps of swan wings. Twenty-three expert female dancers (Dance group) and 21 inexperienced age-matched females (Control group) participated in the study. Thirty-three reflective markers were attached to the trunk and uppe...

INTRODUCTION Shoulder joint is the most frequently dislocated joint. However, it is rarely neglected and treatment is sought immediately. Delayed or neglected shoulder dislocations are difficult to manage and require extensive procedures to obtain good functional outcome. Very few cases are described in literature showing neglected shoulder dislocation with good functional range of movement. We...

BACKGROUND The natural history of rotator cuff tears can be unfavorable as patients develop fatty infiltration and muscle atrophy that is often associated with a loss of muscle strength and shoulder function. To facilitate study of possible biologic mechanisms involved in early degenerative changes to rotator cuff muscle and tendon tissues, the objective of this study was to develop a joint cap...

BACKGROUND AND PURPOSE Long-term outcome after surgery for grade-V acromioclavicular joint dislocation has not been reported. We performed a retrospective analysis of functional and radiographic outcome 15-22 years after surgery. PATIENTS AND METHODS We examined 50 patients who were treated at our hospital between April 1985 and December 1993. Various methods of stabilization were used: K-wir...