Ventilation for Swine Buildings

The trend in swine housing toward multiple farrowing systems and confinement growing and finishing units has brought about a need for an increased amount of environmental control. Close control of temperature, relative humidity, fresh air and sanitation has become a matter of prime importance. Of these factors, the control of temperature, relative humidity and fresh air thro ugh proper insulation and ventilation require the most precise planning and design in swine housing systems. Ventilation is required to remove the moisture produced by the animals as well as to control temperature and odors. A properly planned ventilation system requires an adequately insulated building, good air distribution and some form of supplemental heat to maintain inside temperatures during cold weather

A Progress Report on the Performance of Growing-Finishing Swine Under Different Environmental Conditions

Another series of trials have been completed on the effects of various floor types, number of pigs per pen and open versus insulated, ventilated housing on the performance of growing-finishing pigs. The floor types were: 10 0% slotted , 5 0% slotted, 2 5 % slotted, and concrete with a narrow, deep gutter across the end of the pen. The slats were 5 inch wide reinforced concrete. Pits under the floor accumulated the manure. Pen sizes were either 5 x 15 feet or 10 x 15 feet. Eight or 9 pigs were placed in the smaller pens and the number of pigs was doubled in the larger pens. The pigs used in these trials were SPF Hampshire, Yorkshire, and Duree crossbred pigs. A 22 x 22 foot house with an adjoining outside concrete pen was used to compare the performance of pigs reared in this environment with the pigs in the insulated, ventilated house. Bedding was used in this house during both trials and the pigs were watered outside. One of two groups in this house was fed inside and the other was fed outside

Swine Housing Research - Southeast Experiment Farm

The development of the Southeastern Experimental Farm has created the opportunity for studies in swine housing management. Initial steps taken to develop a program were the construction of three temporary structures, which were described in the 1963 Animal Science Mimeo Series. Results of the first summer study (A.S. Mimeo 63 -1) were reported. Daily gains and feed required per pound of gain were approximately the same among pigs on slotted floor, concrete floor with slotted dunging alley and concrete floor with bedding. More labor was required for the conventional concrete floor and sloping floor than was required for the completely slotted floor. In 1963 all were removed and the farm was repopulated with SPF (specific pathogen free) pigs. The uninsulated temporary house was moved to pasture for the two insulated houses were used for growing-finishing 1963-64 and the summer of 1964

Swine Housing Studies: Type of Floors, Insulation and Methods of Handeling Waste

Swine housing is in an era of research, new ideas, and changes. Never before have we been more conscious of housing management and facilities for swine. Many swine producers are wondering if they should continue with the same facilities, or remodel the existing buildings, or construct a new building. If the producer decides to change or remodel, then a barrage of questions should be answered. Important considerations are: Complete confinement or pasture? What floor plan and manure handling method? Should the building be enclosed, insulated, ventilated, and how much automatic equipment? Perhaps we should make it clear in this paper that the authors are not suggesting a change should be made by swine producers, but rather swine can be profitably reared with good management under many conditions on pasture, in confinement, or a combination of pasture and confinement. Confinement rearing is relatively new and many new ideas are being tested. The purpose of this research is to provide information on some of these ideas

Marshall University Music Department Presents the 2010 Marshall University Chamber Choir Invitational, Dr. Angela Batey, Adjudicator/Guest Clinician, Dr. David Castleberry, Adjudicator, Dr. H.G. Young III, Adjudicator

https://mds.marshall.edu/music_perf/1443/thumbnail.jp

Performance of Growing-Finishing Swine Under Different Environmental Conditions

The performance of growing-finishing pigs maintained in pens with different floor construction has been studied in two experiments (winter and summer). The four types of floor construction are: completely slotted, 5CY/o slotted, 25% slotted and a sloped concrete floor with a narrow gutter across the lower end of the pen. Pits under the slotted floors accumulate the manure. In addition to floor type, a comparison has been made of number of pigs per pen and controlled and uncontrolled house temperatures. Pen size was 5 x 15 feet when 8 or 9 pigs were used per pen and 10 x 15 feet when the pig numbers were doubled thus allowing the same number of square feet per pig. Feeder and water space per pig was also equalized between lots. During the winter trial two lots of pigs were also confined in an uninsulated house and bedded with straw. Feeders and waters were located inside of these houses. Identical rations were fed to all lots of pigs in both experiments. The composition of the rations fed are shown in Table 1

Monte Carlo simulations of the four-dimensional XY spin glass at low temperatures

We report results for simulations of the four-dimensional XY spin glass using the parallel tempering Monte Carlo method at low temperatures for moderate sizes. Our results are qualitatively consistent with earlier work on the three-dimensional gauge glass as well as three- and four-dimensional Edwards-Anderson Ising spin glass. An extrapolation of our results would indicate that large-scale excitations cost only a finite amount of energy in the thermodynamic limit. The surface of these excitations may be fractal, although we cannot rule out a scenario compatible with replica symmetry breaking in which the surface of low-energy large-scale excitations is space filling.Comment: 6 pages, 8 figure

Numerical studies of the two- and three-dimensional gauge glass at low temperature

We present results from Monte Carlo simulations of the two- and three-dimensional gauge glass at low temperature using the parallel tempering Monte Carlo method. Our results in two dimensions strongly support the transition being at T_c=0. A finite-size scaling analysis, which works well only for the larger sizes and lower temperatures, gives the stiffness exponent theta = -0.39 +/- 0.03. In three dimensions we find theta = 0.27 +/- 0.01, compatible with recent results from domain wall renormalization group studies.Comment: 7 pages, 10 figures, submitted to PR

Quantum theta functions and Gabor frames for modulation spaces

Representations of the celebrated Heisenberg commutation relations in quantum mechanics and their exponentiated versions form the starting point for a number of basic constructions, both in mathematics and mathematical physics (geometric quantization, quantum tori, classical and quantum theta functions) and signal analysis (Gabor analysis). In this paper we try to bridge the two communities, represented by the two co--authors: that of noncommutative geometry and that of signal analysis. After providing a brief comparative dictionary of the two languages, we will show e.g. that the Janssen representation of Gabor frames with generalized Gaussians as Gabor atoms yields in a natural way quantum theta functions, and that the Rieffel scalar product and associativity relations underlie both the functional equations for quantum thetas and the Fundamental Identity of Gabor analysis.Comment: 38 pages, typos corrected, MSC class change