This paper describes a tabu search heuristic for a vehicle routing problem where the owner of a private fleet can either visit a customer with one of his vehicles or assign the customer to a common carrier. The owner's objective is to minimize the variable and fixed costs for operating his fleet plus the total costs charged by the common carrier. The proposed tabu search is shown to outperform ...

To the Editor: Ezri et al.1 described serum electrolyte changes following ingestion of cathartics prior to bowel resection surgery. The authors dosed 90 mL of Fleet® Phospho-soda® to their subjects. This is twice the recommended dose of 30–45 mL according to the current professional Fleet® Phospho-soda® labelling.2 Fleet® Phospho-soda® should be used only at the recommended dosage and only in p...

The Indiana Department of Transportation (INDOT) spends approximately $30 to $60 million a year on deicing salt and operates fleet 1,000 winter operations trucks distributed among 140 locations. entire is now instrumented with location telematics, all new have integrated dash cameras, spreader application rate plow up/plow down into the telematics link. When storms occur, they varying regional ...

The future of U.S. transport energy requirements and emissions is uncertain. Transport policy research has explored a number of scenarios to better understand the future characteristics of U.S. light-duty vehicles. Deterministic scenario analysis is, however, unable to identify the impact of uncertainty on the future U.S. vehicle fleet emissions and energy use. Variables determining the future ...

the conventional method towards deriving schedule for a fleet of ships to minimize cost alone has the short-coming of not addressing the problem of operation revenue losses associated with delays during maintenance at ships dockyards. in this paper, a preventive maintenance schedule for a fleet of ships that incorporates op-portunity cost is presented. the idea is to assign a penalty cost to al...

Spatial and temporal variability of atmospheric water vapor (H2O) is extremely high, and therefore it is difficult to accurately evaluate the measurement precision of H2O data by a simple comparison between the data derived from two different instruments. We determined the measurement precisions of column-averaged dry-air mole fractions of H2O (XH2O) retrieved independently from spectral radian...

The growth in the short sea shipping sector motivated the development of a methodology used as a decision support tool in which both the parameters regarding the demand of markets and the characteristics of the fleet may be tested and appraised. It is also possible to determine the fleet deployment, establishing its routes and scales in the ports for a particular scenario. The considered method...