The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Harold W. Gonyou - One of the best experts on this subject based on the ideXlab platform.
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Artificial Pigs in Space: Using Artificial Intelligence and Artificial Life Techniques to Design Animal Housing
Journal of Animal Science, 1998Co-Authors: W. R. Stricklin, J.z. Zhou, Paul Bourcier, Harold W. GonyouAbstract:Computer simulations have been used by us since the early 1970s to gain an understanding of the spacing and movement patterns of confined Animals. The work has progressed from the early stages, in which we used randomly positioned points, to current investigations of animats (computer-simulated Animals), which show low levels of learning via artificial neural networks. We have determined that 1) pens of equal floor area but of different shape result in different spatial and movement patterns for randomly positioned and moving animats; 2) when group size increases under constant density, freedom of movement approaches an asymptote at approximately six animats; 3) matching the number of animats with the number of corners results in optimal freedom of movement for small groups of animats; and 4) perimeter positioning occurs in groups of animats that maximize their distance to first- and second-nearest neighbors. Recently, we developed animats that move, compete for social dominance, and are motivated to obtain resources (food, resting sites, etc.). We are currently developing an animat that learns its behavior from the spatial and movement data collected on live pigs. The animat model is then used to pretest pen designs, followed by new pig spatial data fed into the animat model, resulting in a new pen design to be tested, and the steps are repeated. We believe that methodologies from artificial-life and artificial intelligence can contribute to the understanding of basic Animal behavior principles, as well as to the solving of problems in production agriculture in areas such as Animal Housing design.
Chung-min Liao - One of the best experts on this subject based on the ideXlab platform.
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Dynamic model for predicting dust-borne odour concentrations in ventilated Animal Housing
Applied Mathematical Modelling, 2000Co-Authors: Chung-min Liao, Jui-sheng Chen, Jein-wen ChenAbstract:Abstract The behavior of the interaction among odour, airborne dust, and dust-borne odour in a ventilated enclosure was studied from a dynamic point of view. Various parameters are of interest including the odour emission from stored manure, the role of ventilation as a removal mechanism, and the behavior of the ambient airborne dust present in the Animal Housing. Gas-phase (odour), airborne dust-phase, and adsorbed-phase (dust-borne odour) were included in the model to reflect the dynamic and time-dependent scheme such as odour degradation, adsorption of odour to the existing airborne dust, ventilation, and surface deposition. The derived dynamic equations are sufficiently general to take into account the simultaneous removal effects of turbulent diffusive deposition, gravitational sedimentation, and airflow within a ventilated enclosure. A sensitivity analysis for evaluating the parameters such as ventilation rate, dust particle size, and ambient aerosol profile is also presented. The model can be used in the future to evaluate the dust-borne odour exposure as a function of environmental and other parameters such as aerosol profile, ventilation rate, and enclosure dimension.
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Design of an airborne dust control system in ventilated Animal Housing
Applied Mathematical Modelling, 1993Co-Authors: Chung-min Liao, J.j.r. FeddesAbstract:Abstract The dynamics of a lumped-parameter model for describing the behavior of airborne dust in Animal Housing are used in the development of controllers for an airborne dust control system. Proportional ( P ) and Proportional-integral ( PI ) feedback controllers designed from the viewpoint of modern state-variable control theory are used as an airborne dust control system in ventilated Animal Housing. Linear quadratic regulators ( LQRs ) with output feedback control of a linear-invariant system are chosen for this study. The plant is represented by a linear dynamic equation that describes the dynamic behavior of airborne dusts undergoing turbulent diffusive deposition and gravitational settling in a ventilated airspace. To illustrate this procedure, the design was applied to control the dust concentration in typical Animal Housing.
David B. Beasley - One of the best experts on this subject based on the ideXlab platform.
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Real-time airflow rate measurements from mechanically ventilated Animal buildings.
Journal of the Air & Waste Management Association (1995), 2009Co-Authors: Steven J. Hoff, Dwaine S. Bundy, Minda A. Nelson, Brian C. Zelle, Larry D. Jacobson, Albert J. Heber, Yuanhui Zhang, Jacek A. Koziel, David B. BeasleyAbstract:Abstract This paper describes techniques used to determine airflow rate in multiple emission point applications typical of Animal Housing. An accurate measurement of building airflow rate is critical to accurate emission rate estimates. Animal Housing facilities rely almost exclusively on ventilation to control inside climate at desired conditions. This strategy results in building airflow rates that range from about three fresh-air changes per hour in cold weather to more than 100 fresh-air changes per hour in hot weather. Airflow rate measurement techniques used in a comprehensive six-state study could be classified in three general categories: fan indication methods, fan rotational methods, and airspeed measurement methods. Each technique is discussed and implementation plans are noted. A detailed error analysis is included that estimated the uncertainty in airflow rate between ±5 and ±6.1% of reading at a building operating static pressure, air temperature, relative humidity, and barometric pressure o...
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real time airflow rate measurements from mechanically ventilated Animal buildings
Journal of The Air & Waste Management Association, 2009Co-Authors: Steven J. Hoff, Dwaine S. Bundy, Minda A. Nelson, Brian C. Zelle, Larry D. Jacobson, Albert J. Heber, Yuanhui Zhang, Jacek A. Koziel, David B. BeasleyAbstract:This paper describes techniques used to determine airflow rate in multiple emission point applications typical of Animal Housing. An accurate measurement of building airflow rate is critical to accurate emission rate estimates. Animal Housing facilities rely almost exclusively on ventilation to control inside climate at desired conditions. This strategy results in building airflow rates that range from about three fresh-air changes per hour in cold weather to more than 100 fresh-air changes per hour in hot weather. Airflow rate measurement techniques used in a comprehensive six-state study could be classified in three general categories: fan indication methods, fan rotational methods, and airspeed measurement methods. Each technique is discussed and implementation plans are noted. A detailed error analysis is included that estimated the uncertainty in airflow rate between +/-5 and +/-6.1% of reading at a building operating static pressure, air temperature, relative humidity, and barometric pressure of 20 Pa, 25 degrees C, 50%, and 97,700 Pa, respectively.
W. R. Stricklin - One of the best experts on this subject based on the ideXlab platform.
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Artificial Pigs in Space: Using Artificial Intelligence and Artificial Life Techniques to Design Animal Housing
Journal of Animal Science, 1998Co-Authors: W. R. Stricklin, J.z. Zhou, Paul Bourcier, Harold W. GonyouAbstract:Computer simulations have been used by us since the early 1970s to gain an understanding of the spacing and movement patterns of confined Animals. The work has progressed from the early stages, in which we used randomly positioned points, to current investigations of animats (computer-simulated Animals), which show low levels of learning via artificial neural networks. We have determined that 1) pens of equal floor area but of different shape result in different spatial and movement patterns for randomly positioned and moving animats; 2) when group size increases under constant density, freedom of movement approaches an asymptote at approximately six animats; 3) matching the number of animats with the number of corners results in optimal freedom of movement for small groups of animats; and 4) perimeter positioning occurs in groups of animats that maximize their distance to first- and second-nearest neighbors. Recently, we developed animats that move, compete for social dominance, and are motivated to obtain resources (food, resting sites, etc.). We are currently developing an animat that learns its behavior from the spatial and movement data collected on live pigs. The animat model is then used to pretest pen designs, followed by new pig spatial data fed into the animat model, resulting in a new pen design to be tested, and the steps are repeated. We believe that methodologies from artificial-life and artificial intelligence can contribute to the understanding of basic Animal behavior principles, as well as to the solving of problems in production agriculture in areas such as Animal Housing design.
Vincent Dodd - One of the best experts on this subject based on the ideXlab platform.
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Applications of computational fluid dynamics (CFD) in the modelling and design of ventilation systems in the agricultural industry: A review
Bioresource technology, 2007Co-Authors: Tomas Norton, Da-wen Sun, Jim Grant, Richard Fallon, Vincent DoddAbstract:The application of computational fluid dynamics (CFD) in the agricultural industry is becoming ever more important. Over the years, the versatility, accuracy and user-friendliness offered by CFD has led to its increased take-up by the agricultural engineering community. Now CFD is regularly employed to solve environmental problems of greenhouses and Animal production facilities. However, due to a combination of increased computer efficacy and advanced numerical techniques, the realism of these simulations has only been enhanced in recent years. This study provides a state-of-the-art review of CFD, its current applications in the design of ventilation systems for agricultural production systems, and the outstanding challenging issues that confront CFD modellers. The current status of greenhouse CFD modelling was found to be at a higher standard than that of Animal Housing, owing to the incorporation of user-defined routines that simulate crop biological responses as a function of local environmental conditions. Nevertheless, the most recent Animal Housing simulations have addressed this issue and in turn have become more physically realistic.