It is generally considered necessary to measure concentrations of contaminants-of-concern at a background location when conducting atmospheric environmental surveillance. This is because it is recognized that measurements of background concentrations can enhance interpretation of environmental monitoring data. Despite the recognized need for background measurements, there is little published gu...

The goal of a laboratory’s general ventilation system is to control airborne contaminants below concentrations of concern while maintaining a comfortable environment. One concern while managing general laboratory ventilation is how uniformly the room is ventilated. We have observed that, depending on the configuration of the ventilation supply and exhaust points relative to the geometry of the ...

The blooming of economy in Hong Kong started in 1950s. People witnessed the change from a rural town to a modern city. It required the participation of a large number of labours. The development of a list of "practical" hygiene standards for control of airborne contaminants in workplaces is important to protect the well beings of those workers. It follows the pace of economic changes, and it ta...

UNLABELLED The droplets exhaled by an index patient with infectious disease such as influenza or tuberculosis may be the carriers of contagious agents. Indoor environments such as the airliner cabins may be susceptible to infection from such airborne contagious agents. The present investigation computed the transport of the droplets exhaled by the index patient seated in the middle of a seven-r...

Large-scale scientific computing is playing an ever-increasing role in critical decision-making and dynamic, event-driven systems. While some computation can simply wait in a job queue until resources become available, key decisions concerning life-threatening situations must be made quickly. A computation to predict the flow of airborne contaminants from a ruptured railcar must guide evacuatio...

The increasing occurrence of allergies in the developed countries and greater interest in food safety has drawn attention to the presence of allergens in agro products during storage. Stored agro products can contain allergenic contaminants of plant, microbial, or animal origin. Several stored-product insect and mite species were confirmed as sources of allergens. The most important are storage...

Childhood lung diseases in the United States are on the rise. This is especially true for chronic respiratory diseases such as allergic asthma, where the incidence among children in polluted inner cities has reached epidemic proportions. We believe that the recent marked increase in the incidence of childhood asthma results from the convergence of six separate factors (three of which are charac...

Abstract Over the last decade, several hyper-scale data center companies such as Google, Facebook, and Microsoft have demonstrated cost-saving capabilities of airside economization with direct/indirect heat exchangers by moving to chiller-less air-cooled centers. Under pressure from owners, information technology equipment OEMs like Dell IBM are developing that can withstand peak excursion temp...