David J. Brown

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Two hundred sixteen crossbred barrows and gilts (84.3 kg BW) were used to test the effects of dietary energy density and lysine:energy ratio (Lys:ME) on the performance, carcass characteristics, and pork quality of finishing pigs fed 10 ppm ractopamine. Pigs were blocked by BW and gender, allotted to 36 pens (six pigs per pen), and pens were assigned(More)
Phosphorylated mannans derived from the yeast cell wall of Saccharomyces cerevisiae may beneficially modulate immune function in the weanling pig, possibly providing an alternative to the use of dietary growth-promoting antibiotics. Therefore, in this study, 32 pigs averaging 19 d of age and 5.7 +/- 0.2 kg initial BW were randomly assigned to 16 pens in an(More)
With recent advances in battery capacity and the development of hydrogen fuel cells, autonomous underwater vehicles (AUVs) are being used to undertake longer missions that were previously performed by manned or tethered vehicles. As a result, more advanced navigation systems are needed to maintain an accurate position over a larger operational area. The(More)
Elicited from the least means squares optimal algorithm (LMS), an adaptive fuzzy logic controller (AFC) based on interval type-2 fuzzy sets is proposed for vehicle non-linear active suspension systems. The interval membership functions (IMF<sup>2</sup>s) are utilized in the AFC design to deal with not only non-linearity and uncertainty caused from irregular(More)
In order to study left ventricular function in idiopathic hypertrophic subaortic stenosis (IHSS), left ventricular echograms were analyzed by computer and compared with results in normal subjects. Systolic function was consistently normal or above normal even in the presence of severe diastolic abnormalities. Wide variation in diastolic function in IHSS(More)
Two experiments were conducted to determine the efficacy of mannan oligosaccharides (MOS) fed at two levels of Cu on growth and feed efficiency of weanling and growing-finishing pigs, as well as the effect on the immunocompetence of weanling pigs. In Exp. 1, 216 barrows (6 kg of BW and 18 d of age) were penned in groups of six (9 pens/treatment). Dietary(More)
Customer requirements are the foundation upon which a software system is built. These requirements, derived from the customers’ needs and desires, are used to both guide the development of the system and to determine if the completed system is what the customer requested. Because of its importance, requirement specification has become a research area known(More)
Discovery of Design Methodologies for the Integration of Multi-disciplinary Design Problems by Cirrus Shakeri Doctor of Philosophy in Mechanical Engineering Worcester Polytechnic Institute In order to succeed in today’s global, competitive market, manufacturing industries need continuous improvements in their multi-disciplinary design processes. These(More)
measure of left ventricular volume, estimates offilling rates were also made. The characteristics of left ventricular filling were studied in IO normal subjects, and in 5o patients with different types of heart disease. In normal subjects, the peak rate of increase of left ventricular dimension had a mean value of iI cm/sec, corresponding to a filling rate(More)
An echocardiographic study was carried out on 23 young diabetics, 19 of whom had retinopathy. Their diastolic function was analysed by comparing the timing and pattern of mitral valve opening with the pattern of left ventricular wall movement. Only six patients had all their values within the normal range. Fourteen patients had abnormalities similar to(More)