Thermal energy storage is an essential component of solar heating systems. A numerical analysis of thermal stratification in hot water storage tanks suitable for solar water heating applications is presented in this paper. Transient, axi-symmetric, turbulent natural convection in fully and partially charged storage tanks for varying Rayleigh Number in the range of 10 to 10 is studied. Mix Numbe...

The objective of this study was to probe the relationship between prevalence of selected principal mastitis pathogens and somatic cell counts in bulk tank milk samples. The sources of milk contamination were evaluated. The samples were collected from 298 dairy herds (with approximately 32 000 dairy cows). Only 48.3% of the bulk tank milk samples were free of contamination of pathogens of intere...

Chlorine is extensively used to disinfect drinking water supply. However, the design of chlorine contact tank is usually based on the volume displacement criterion, paying attention that detention time would be at least of half an hour. This criterion relies upon the assumption that plug-flow conditions hold along the tank. However, the existence and arrangement of baffles in the tank, and the ...

BACKGROUND At the entrance of a tunnel, reflection of sunlight from the surrounding environment and a lack of adequate lighting usually cause some vision problems. The purpose of this study was to perform a safety evaluation of lighting on a very long road in Ilam, Iran. METHODS The average luminance was measured using a luminance meter (model S3; Hagner, Solna, Sweden). A camera (model 108, ...

The design of vehicles transporting hazardous materials has important public safety and economic implications. Conventional wisdom among industry and government has held that a thicker tank on railroad tank cars and trucks reduces risk. However, a thicker tank increases vehicle weight and thus leads to an increase in the number of shipments required to transport the same amount of product and c...

Stereoscopy is commonly used in film and interactive media to provide depth perception, but is not the only method available to meet this need. This paper examines fish tank virtual reality as an alternative to stereoscopy. A study was conducted using three methods of depth perception projection: a stereoscopic image, a fish tank virtual reality (VR) image, and a combination of stereoscopic and...

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has met all requirements and is qualified for the medical study program, he/she is invited for an entrance examination. The applicant is informed about the date and place of the entrance examination in time. The examination is in the form of multiple-choice tests in Biology and Chemistry and it is carried out in English language. The test consists of 40 questions in each of the subjects and it ...

An environmental water releases to the Snowy River was made in October 2011 (12,000 ML/day) as part of the Snowy River Increased Flows Program. The effects on the inlet entrance morphology and tidal response were measured on four field trips for each release to cover the flow peak and recovery. Water level recorders were deployed in the principal channels over the period of the releases and for...