in the traditional hole drilling method the in-plane stresses are studied in detail and the interlaminar stresses are not taken seriously. the interlaminar stresses on the free edge of composite materials are important and can cause matrix cracking and delamination. inserting holes in composite laminates causes free edges and it can induce interlaminar shear and normal stresses. in this researc...

background accident is an event that occurs suddenly, unexpectedly and inadvertently under unforeseen circumstances. accidents can have individual, social and economical effects 2080 injury cases including labor-law workers were studied in mashhad city, islamic republic of iran. their data were collected from the labor office archive. objectives this study was conducted to determine the effecti...

Effective interventions to reduce work-related exposures are available for many types of work-related diseases or injuries. However, knowledge of the impact of these interventions on injury or disease outcomes is scarce due to practical and methodological reasons. Study designs are considered for the evaluation of occupational health interventions on occupational disease or injury. Latency and ...

results the overall prevalence of occupational asthma was 9.7%. this rate was 13.8% in the exposed group. logistic regression analysis showed that even after adjustment for confounding factors, a significant correlation existed between the frequency of occupational asthma and exposure to the produced dust particles (p < 0.05). in addition, age, work experience, body mass index, cigarette smokin...

Thin film Ni-Cu diffusion couples (individual layer thicknesses: 50 nm) were prepared by direct-current magnetron sputtering on silicon substrates. Interdiffusion and solid-solution formation, the associated changes of microstructure and the evolution of mechanical stresses of the Ni-Cu diffusion couples during thermal treatments were investigated employing ex-situ X-ray diffraction phase and t...

applications of thermoplastic composites have developed extensively. the thermoplastic composites in comparison with the thermoset composites have many advantages. thermoplastic composites can be melted and remolded many times. the duration of manufacturing process of these composites is short, producing very tough material, and the welding ability and multiple recyclings are their further adva...

Background: Most studies on occupational health and safety in home and community care focus on the health and safety of professional health care workers such as nurses and therapists and very few address the occupational health and safety of personal support workers (PSWs) who provide 70–80% of community care in the home. The PSW Health and Safety Matters! project provides evidence on the healt...

OBJECTIVE To examine the opinion of patients of an occupational diseases hospital on the quality of provision of occupational medicine services in Turkey. MATERIALS AND METHODS A total of 189 patients were interviewed using a 13-item survey about their jobs and workplaces. RESULTS The overall results of this study were as follows: 80.4% of the patients stated that physicians were located at...