Artificial silk is made by the viscose process in Hungary. Systematic air analyses and medical surveys have been carried out in a viscose rayon factory for the purpose of studying the maximum allowable or toxic concentration ofcarbon disulphide. In view of the fact that widely varying concentrations may give misleading results, we have not drawn any conclusions from the investigation of persons...

Workforce scheduling problems are typical constraint satisfaction problems in which different constraints must be fulfilled, like needed workforce per day, forbidden sequences of shifts, length of work and days-off blocks etc. There are two main variants of workforce schedules: rotating (or cyclic) workforce schedules and non-cyclic workforce schedules. In a rotating workforce schedule all empl...

The continuous increase in the number of new chemical substances introduced into industry, or arising in the course of production, forces us to search for faster methods of establishing the maximum allowable concentrations (M.A.C.'s). It is obvious that the M.A.C. can only be one that does not have any harmful effects on the human organism in the course of full-time work of long duration. It is...

The authors investigated different sulfolane concentrations in surface water and also performed the field study. The results showed that the practical threshold value of sulfolane affecting the organoleptic property (order) of water amounted to 10.6 mg/L. The sulfolane concentration did not inhibit the process of biochemical oxygen demand (BOD). The chronic threshold and no-effect doses for sul...

There are two approaches to the determination of maximum permissible concentrations in urine (M.V.C.'s). The first is the direct method of comparing the concentration of toxic substances with the incidence of symptoms of intoxication. The second is the indirect approach of considering the worker as a sampling device and relating the urinary excretion to the atmospheric concentration to which th...

When designing Networked Control Systems (NCS), the maximum allowable transmission interval (MATI) is an important quantity, as it provides admissible time between two instants. An efficient procedure to compute a bound on MATI such that stability can be guaranteed for general nonlinear NCS emulation of continuous-time controller. In this paper, we present simple but modification well-establish...

background and objectives: in this paper, a real life nurse scheduling model is described based on the conditions in iranian hospitals such as monthly shift rotation, consecutive morning and evening shifts and consecutive evening and night shift.   methods: the developed model considers both hospital constraints and nurses’ preferences. hospital constraints include assigning adequate qualified ...

  A new computational technique is presented to find the optimal base position of dual arm robots in order to carry maximum allowable load. The maximum allowable load on a desired trajectory is limited by the number of factors such as; actuators torque limits, kinematic constraints, and kinematic redundancy of cooperative manipulators. For a dual arm robot mounted on a rail or table, load works...