We present the case of a 48-year-old woman with hypothenar hammer syndrome. Hypothenar hammer syndrome is caused by chronic repetitive trauma to the ulnar artery and superficial palmar arch. This syndrome was originally described in males working in occupations that involved repetitive blunt trauma including working with jackhammers. It is believed that the ulnar artery is repetitively damaged ...

For concrete strength detection in structures different testing procedures are being used. For nondestructive testing of concrete strength built in the construction the most used impact hammers in technical practice are those of Schmidt system. The hammer rebound value on concrete is influenced by number of factors, these includes the treatment of the test area. In the article there are present...

An elderly woman was observed after hip surgery to start a rehabilitation program; physical examination revealed a lush hallux valgus, however no complaints were reported. Hallux valgus is a frequent forefoot deformity; global prevalence is 35% in those over 65 years-old.1 Women are more affected; deformity is normally attributed to ill-fitting shoes.1 Imbalance of the extrinsic/intrinsic foot ...

The objective is to evaluate the primary mechanical and physical properties of particleboard made from hammer-milled rice straw particles of six different categories and two types of resins. The results show the performance of straw particleboards is highly dependent upon the straw particle size controlled by the opening size of the perforated plate inside the hammer-mill. The static bending an...

Original scientific paper In the pipelines of water supply systems, the water hammer phenomenon often arises during rapid unsteady developments. Pipelines are mostly protected using an air vessel, which is designed by means of equations for oscillations of water mass. In this study, an analysis is made of the impact of pressure increases caused by water hammer on pressure variations in pipeline...

This report outlines the development and testing of a prototype compact automated impact hammer designed to be surface mounted on a structure to provide an impulse-based structural excitation source for vibration testing. The automated device was designed to be integrated with a distributed fibre optic sensing system which measures the in-plane dynamic strain of the structure at a spatially den...

A circular 30-microphone array of 90 cm radius has been used to produce acoustic images of several string instruments. The soundboxes were excited by an automated impact hammer, and the instruments were suspended inside the array in such a manner that both the soundbox and hammer mechanism could be rotated in the horizontal plane. By normalizing all microphone signals to the hammer signal, data...