We study a three-level quantum refrigerator which is driven by generic light state, even nonclassical one. With the help of $P$ function expansion driving light, we obtain heat current generated different types states. It turns out all input states give same coefficient performance for this refrigerator, while cooling power depends not only on intensity but also specific photon statistics light...

Proper storage of shea butter is crucial to maintain quality and ensure availability the product over time, particularly in production zones where refrigeration not an option. The present study investigated several characteristics under different conditions. Three packaging materials (i.e. calabash, black plastic, transparent plastic), often used store zones, were for six months at ambient cond...

A reciprocating quantum refrigerator is analyzed with the intention to study the limitations imposed by external noise. In particular we focus on the behavior of the refrigerator when it approaches the absolute zero. The cooling cycle is based on the Otto cycle with a working medium constituted by an ensemble of noninteracting harmonic oscillators. The compression and expansion segments are gen...

1. The virus of yellow fever may be preserved for at least 154 days in the blood or liver tissue of infected monkeys if the material is dried in a vacuum while in the frozen state and kept in the refrigator in sealed glass containers. A gradual diminution of virulence is noticeable in the older specimens. 2. If infectious blood is dried in a vacuum at room temperature, instead of in the frozen ...

We introduced home drinking water disinfection and handwashing with soap in Karachi squatter settlements to evaluate their effect on diarrhea. In April 2000, 150 households received soap, 76 received dilute bleach and a water storage vessel, and 76 were enrolled as controls. In 2000, among households wealthy enough to own a refrigerator, children in households that received bleach and a vessel ...

An intermittent noise that occurs around 30 seconds after compressor start-up has been disturbing customers of many domestic refrigerator manufacturers over the past 10 years. This noise is very similar to that produced by popcorn popping, being referred to as popping noise. The most probable cause of this strange and unpleasant noise is thought to be CIS (Condensation Induced Shock). The aim o...