The dynamic assignment problem arises in a number of application areas in transportation and logistics. Taxi drivers have to be assigned to pick up passengers, police have to be assigned to emergencies, and truck drivers have to pick up and carry loads of freight. All of these problems are characterized by demands that arrive continuously and randomly throughout the day, and require a dispatche...

Overhead cranes are usually operated manually to move heavy loads. Fast and smooth movements of the loads are the main objectives of crane operations. However, both the objectives always contradict with each other, so that it is hard to achieve positioning and swing control simultaneously by using conventional methods. This paper presents the adaptive fuzzy sliding mode controller (AFSMC) to re...

Textile wastewater contains substantial pollution loads in terms of Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS) and heavy metals. Phytoremediation used for removing heavy metals and other pollutants by aquatic macrophytes treatment systems (AMATS) is well established environmental protective technique. A lab scale stud...

Nowadays, the use of Auxiliary power supply (APS) systems to energize low power rating appliances (e.g. televisions, water dispensers, etc.) and lighting (e.g. CFL lamps) has become pervasive in countries where long power rationing schemes are applied. Although the existing APS systems offer overload protection, it cannot be directly connected to the existing electric circuit unless heavy loads...

Farm youth often carry loads that are proportionally large and/or heavy, and field measurements have determined that these tasks are equivalent to industrial jobs with high injury risks. The purpose of this study was to determine the effects of age, load amount, and load symmetry on lower extremity joint moments during carrying tasks. Three age groups (8-10 years, 12-14 years, adults), three lo...

It has been suggested that exposure to heavy school backpacks is a relatively recent phenomenon. Factors such as reduced use of student lockers secondary to security concerns, an increased use of laptop computers, and increased carrying of non-educational loads such as musical instruments and sports equipment have potentially increased student exposure to heavy load carriage. It is therefore pl...