Assessment of indoor atmospheric contamination in sheep shelter

Assessment of indoor atmospheric contamination in sheep shelter

Автор: A Yasotha

Indoor air pollution is one of the most serious constraints mostly concerned with livestock housing under intensive/industrial system of management. In intensive system of animal rearing, the incidences of respiratory diseases are high owing to quality of air and its contents such as dust, microorganisms and gaseous pollutants. Hence, this book enlightens in detail to assess the quality of air inside the sheep house particularly reared under different flooring systems. The book reveals relevant facts about the level of contaminants such as dust, ammonia, total bacteria, coliform and mould content in the atmosphere of sheep house including air temperature, relative humidity and air velocity on health and performance of sheep. It also provides a perfect platform for the sheep farmers to decide on type of flooring system providing better air quality in sheep confinement pens. Further, it will be helpful for the budding researchers, sheep entrepreneurs and policy makers to implement…

Performance Assessment of Active Contour Models

Performance Assessment of Active Contour Models

Автор: Hum Yan Chai,Tan Tian Swee and Teng Jih Bao

Image segmentation is one of the significant techniques in image processing to distinguish desired parts from its background for further analysis. It provides visual means for inspection of anatomical structure of human body, identification of disease, tracking of its development and input for surgical planning and simulation. Active contour models are regarded as promising and vigorously research model-based approach to computer assisted medical image analysis. However, it is not trivial to assess whether one segmentation algorithm performs more superior than the other. Therefore, a systematic assessment tool is designed and implemented to examine all the important aspects of active contour models. Meanwhile, a novel supervised evaluator including analytical method and empirical methods are proposed to acts as objective evaluator. The obtained results highlighted both the strengths and limitations of the studied active contour models.

Heavy Metal Concentrations in Urban Runoff

Heavy Metal Concentrations in Urban Runoff

Автор: Bruceline Fru and Edward Martinez ( PhD)

Awareness of the possible contamination of our rivers and lakes with heavy metals resulting from urban runoff is necessary. The need for baseline data on pollution studies resulting from urban runoff to water bodies (streams, lakes, rivers etc) is of profound importance. This study focuses on the urbanized part of the Gallinas watershed of Las Vegas, San Miguel County, New Mexico — USA, which covers approximately 52,500 acres to the west of Las Vegas and is developed primarily with residential and light commercial areas. Significant amounts of urban runoff enter the Gallinas River from different drainages and areas during wet weather flow without pre-treatment. The primary objective of this study was to identify the various heavy metals and their concentrations associated with aqueous and suspended solid phases during wet weather flow before discharge into the Gallinas River.

Segregation of powder mixtures in silos

Segregation of powder mixtures in silos

Автор: Niklas Engblom

Segregation can broadly be defined as the opposite of mixing. In bulk solids technology, segregation refers to the involuntary separation of the constituents in an assembly of particles. Segregation can occur at any stage of industrial production or handling of particulate solids and can be very difficult – if not impossible – to avoid. The adverse effects of segregation include reduced blend quality and flow problems in bulk solids handling equipment. This work comprises an experimental investigation of the segregation of mineral-based construction materials and mixtures resembling these (in composition and behavior) in silos of different size (0.5-70 m3). Segregation observed at the end of complete silo emptying was analyzed by use of segregation mechanisms and discharge flow patterns. The relevant segregation mechanisms were identified at silo filling as embedding, fluidization and air-current effects whereas the impact of the discharge flow pattern — mass flow or funnel flow — was…