Traumatic occult pneumothorax and ipsilateral hydatid cyst: A case report.

Introduction: Traumatic pneumothorax is a common chest condition that can be caused by a chest trauma. Hydatid cysts are also common, especially in Syria, and is caused by Echinococcus granulosis infection.

Case Presentation: We report a case of mutual presentation of pneumothorax and a large Hydatid cyst on the same chest side in an 18 years-old patient who got stabbed in the chest.

Thermal Efficiency in Laser-Assisted Joining of Polymer-Metal Composites.

Heat conduction joining is mainly used in laser-based joining of metals with polymers but results in a large amount of dissipated heat. The consideration of thermal efficiency allows the determination of power actually used for creating the joint, which is highly relevant for technical and economic reasons, e.g.