PURPOSE Laparoscopic colectomy has been reported as a safe and oncologically similar operation to open colectomy. A number of expensive surgical instruments are necessary for the procedure which should be applied if it is cost-effective for the patient and the health system in general. The purpose of the current study was the economic evaluation of laparoscopic compared to open colectomy for th...

The welding is the major working process in fitness equipment manufacturing industry, and International Agency for Research on Cancer has classified welding fumes as possibly carcinogenic to humans (Group 2B). The present study aimed to evaluate associations between the occupational exposure of metals and oxidative damage and telomere length shortening in workers involved in the manufacture of ...

Operation of underground coal mine mobile equipment is usually done in a restricted workspace with reduced visibility. This work environment puts machine operators in awkward postures for tasks that require awareness of their surroundings and fast reactions to avoid hazardous situations. Using experienced equipment operators as a source, researchers conducted an investigation that developed a m...

Modern mechanical engineering is characterized by high energy consumption, which specific share of cost can reach from 15 to 25%. The task research energy-efficient technological methods processing, will reduce the and duration production cycle.As a criterion for optimizing machining process, it proposed use quantitative indicators intensity cutting. feasibility using strengthening in process m...

in order to help in the engineering design of rice harvesting machines, there is a need to have exact information concerning the physical and mechanical properties of rice stems. the cutting force for rice stems, therefore, was measured by designing and fabricating a static and dynamic shear test apparatus. the effects of moisture levels and the cross-sectional area of stem as well as the varie...

In the laser cutting process some well-known parameters, e.g. laser power and cutting speed, play major roles in the performance of the process. Each parameter or a combination of parameters can affect the material removal volume and cutting volume efficiency. The purpose of this research is to study the effect of power and maximum cutting speed on the material removal rate (MRR) and cutting vo...

This article continues the series of publications that describe in detail process development, research, and implementation circuit modeling machine vision mechanisms industrial equipment for laser trimming resistors order to obtain products with better characteristics increase economic efficiency process. A model film-resistive elements under action a measuring voltage source, as well an algor...

This paper reports a study aiming at devising common procedure for determining the geometric parameters of tools’ cutting part in technological systems that involve machining by cutting. Underlying development this is generalized theory on blades.
 The analysis geometry tool edges different coordinate has shown used given depends type and design edges. In process cutting, tools change alon...