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...

with the prolonged use of domestic centrifugal pump, due to erosion, corrosion and an unbalance the sever vibration of the pump are resulted. an erratic sound coming out of pump makes the user uncomfortable. here, tuned vibration absorber (tva) is used as a vibration controlling device. it is designed to reduce the rms velocity below 20% of the circumferential speed, at which the impeller is ba...

  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...

In this paper, a two-dimensional axisymmetric module of gas arc extinguishing was simulated using energy balance theories. We used simulation to study the distribution change during arc-extinguishing process. built lightning impulse current experimental platform according IEC standard, and experiments verified preliminary conclusions simulation. Comparison curves data calculations were drawn in...

For a separable metric space X, we consider possibilities for the sequence S(X) = {dn : n ∈ N} where dn = dimX. In Section 1, a general method for producing examples is given which can be used to realize many of the possible sequences. For example, there is Xn such that S(Xn) = {n, n + 1, n + 2, . . .}, Yn, for n > 1, such that S(Yn) = {n, n+ 1, n+ 2, n+ 2, n+ 2, . . .}, and Z such that S(Z) = ...

Machines whose sole function is to re-order their input data are considered. Every such machine defines a set of allowable input-output pairs of permutations. These sets are studied in terms of the minimal disallowed pairs (the basis). Some allowable sets with small bases are considered including the one defined by a priority queue machine. For more complex machines defined by two or more prior...