objective: better understanding of the furcation anatomy may serve to decrease the risk of root perforation. the purpose of this study was to measure the thickness of root walls in the danger zone in mandibular first molars. materials and methods: the roots of 53 extracted human mandibular first molars were sectioned in the horizontal plane 4 mm below the orifice of the mesial and distal root c...

original article   health, safety and environment management has a vast area in which ergonomics aspects is known as one of the related aspects. in this case study the occupational hygiene by ergonomic intervention was focused. one of the prevalence activities among industrial sectors' worker in the developing countries is manual lifting tasks and other related physical activities which are imp...

The selection of instrumentation for data acquisition in physical model studies depends on type and resolution to be recorded, time frame the study, available alternatives, availability skilled personnel overall budget study. recording bed levels or three-dimensional information geometry a range from simple manual gauges sophisticated laser acoustic sensors. In this Structure Motion (SfM) techn...

The paper presents a detailed study of certain working regimes TV2-117A turboshaft engine, based on practical research using experimental data following the engine run tests. tests were made into test bench, hydraulic dynamometer to vary load free power turbine and measure main parameters, by operating dynamometer, different are obtained. To accomplish tests, execution an additional instrumenta...