Experiments were performed to study the effects of introducing vapor into a dewar where a coaxial pulse tube refrigerator was used as a liquefier in the neck of the dewar. We were concerned about how the introduction of vapor might impact the refrigeration load as the vapor barrier in the neck of the dewar is disturbed. Three experiments were performed where the input power to the cooler was he...

Previous work showed that local cooling (LC) attenuates the vasoconstrictor response to whole body cooling (WBC). We tested the extent to which this attenuation was due to the decreased baseline skin blood flow following LC. In eight subjects, skin blood flow was assessed using laser-Doppler flowmetry (LDF). Cutaneous vascular conductance (CVC) was expressed as LDF divided by blood pressure. Su...

ABSTRACT Low-temperature storage is one of the most effective techniques to maintain quality and durability cut flowers. Both maintenance are dependent on plant metabolism factors such as antioxidant system. The objective was evaluate effect low-temperature precooling after harvest, calla lily [Zantedeschia aethiopica (L.) K. Spreng] concerning system, levels hydrogen peroxide (H2O2), malondial...

In the present study, we analyse individual and combined effects of conductive horizontal walls fins on natural convection air in side heated cavities (SHC). The flow heat transfer are studied for Rayleigh numbers range 104−109: Direct Numerical Simulation (DNS) is conducted lower Large Eddy (LES) higher (>108). Thermally destabilize yielding an earlier transition to turbulence expedite decay b...

In recent years, various heating, ventilation, and air-conditioning (HVAC) control strategies have been proposed to reduce buildings’ energy consumption environmental impacts. Due different research designs, it is impossible directly compare the reported performance of these determine best approach for operating real-world buildings. To fill this gap, uses a well-validated building simulation m...

Traditional and modern supply chains for tomato in Cambodia were assessed and possible handling improvements were introduced. Traditional chain involved farmers and collectors in Kandal Province, and wholesalers and retailers in wet markets in the capital of Phnom Penh, about 35 km apart. In the modern chain, only one intermediary between farmers and supermarkets in Phnom Penh was involved; col...