Please cite this article in press as: Burton JC doi:10.1016/j.cryogenics.2011.03.001 We have designed and constructed a continuously operating He cryostat with windows for laser ablation and spectroscopy. A two-stage pulse-tube refrigerator cools two platforms to base temperatures of approximately 40 K and 4 K respectively. The platforms are equipped with heat exchangers that cool separate stre...

OBJECTIVE The North Dakota Legislature recently passed a law exempting the state's agricultural truck fleet from a federal safety program requirement for rear-guard equipment on large trucks. This equipment has been shown to reduce crash severity when a passenger vehicle collides with the rear of the truck. This study uses truck fleet, truck crash, and injury severity data to estimate the publi...

BACKGROUND Drivers of heavy and tractor-trailer trucks accounted for 56% of all production and nonsupervisory employees in the truck transportation industry in 2011. There are limited data for illness and injury in long-haul truck drivers, which prompted a targeted national survey. METHODS Interviewers collected data during 2010 from 1,670 long-haul truck drivers at 32 truck stops across the ...

The objective of this study was to test the effect of four different diluents on the motility of goat semen stored at room and refrigerator temperatures. To achieve this objective, four West African dwarf bucks aged 10-12 months were ejaculated weekly for five weeks using the electro-ejaculator method. The ejaculated semen were extended using four diluents namely sodium citrate (T1), sodium bic...

The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the ty...

background listeria monocytogenes has been isolated from various foods and environments in temperate areas, tropical countries and different parts of iran. the bacterium as a psychrotrophic organism is capable of growth at refrigeration temperatures. objective the current study was conducted to determine the incidence of listeria spp. on the surfaces of domestic refrigerators in ahvaz city as a...

Abstract Application of memetic algorithm (MA) is considered in this work to solve the truck and trailer routing problem (TTRP). In TTRP, some customers can be designated as vehicle customers and can be serviced either by a complete vehicle (a trailer pulling by truck) or a single truck. However, some customers are known as truck customers and have to be serviced by a single truck. To employ t...

This paper considers the effectiveness of a truck appointment system in improving the yard efficiency of the container terminal. This research uses truck appointment information to improve the import container retrieval operation and reduce container rehandles by adopting an advanced container location assignment algorithm. By reducing the container rehandles, the terminal could improve yard cr...

In the present paper, the idea of braking energy regeneration and reusing that energy during acceleration for a refuse truck is comprehended. According to their driving cycle, the refuse trucks have a good potential for braking energy regeneration. On the other hand, hydraulic hybrid is a powertrain with high power density which is appropriate for energy regeneration. In the primary stage of th...

The paper analyzes the various factors that cause failure of refrigerator evaporator. The refrigerator evaporator failure spectrum is constructed through qualitative analysis of the fault tree system after building a corresponding fault tree system. There is an analysis procedure of fault tree system based on computer aided fault tree analysis system (CAFTA).