space E we mean an m-differentiable manifold H with coordinates in a space T such that (1) T is a space E and H has allowable k coordinate systems^ (2) the differentials of the coordinate transformations possess adjoints with respect to the inner product [x, y] of E at each point of their domains of definition; (3) there exists a covariant vector field valued linear form, called a metric form, ...

In this paper, the stress intensity factor (SIF) expression for defected butt welds containing undercut and inclined lack of penetration (LOP) subject to far-field tensile stress is derived. Some of the standards such as ISO 5817 and BS EN 25817 have specified allowable limits for the length of the undercut and LOP defects and for the height of the weld. In addition, EN 29692 standard has deter...

This paper develops a computational technique for finding the maximum allowable load of mobile manipulators for a given trajectory. The maximum allowable loads which can be achieved by a mobile manipulator during a given trajectory are limited by the number of factors; probably the dynamic properties of mobile base and mounted manipulator, their actuator limitations and additional constraints a...

The throughput optimality ofpriority management strategies in a single buffer has been studiedfor a general aggregate arrival law. The tight upper bounds found are useful to understand optimality in utilization of specijic priority schemes such as push-out buffer (POB) and partial buffer sharing (PBS). This paper further focuses on the maximum allowable load pmaa versus the priority mix a for a...

In this article, the multi-objective optimization of cylindrical aluminum tubes under axial impact load is presented.The absorbed energy and the specific absorbed energy (SEA) are considered as objective functions while the maximum crush load should not exceed allowable limit. The geometric dimensions of tubes including diameter, length and thickness are chosen as design variables. The Non-domi...

ABSTRACT: A model is developed to minimize the sum of road construction plus forwarding costs with the constraint that rut depth caused by the forwarder cannot exceed a maximum depth during the anticipated season of operation. Road spacing, forwarder trail spacing, and forwarder capacity are used as decision variables in developing the transportation plan. The total cost was minimized using the...

Calculations based on the usual one-dimensional theory of piezoelectric rystal systems have been carried out for several particular variable resonant frequency crystal systems radiating into water. Curves are presented showing the (1) power output as a function of frequency for operation both on and off resonance, (2) resonant frequency shift as a function of backing length, and (3) relative ba...

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...