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Showing 1 to 17 of 17 for “"Dhia"”.
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Nutritional and Management Practices to Reduce Excessive Nutrient Excretion on Dairy Farms
… collaborator herds were identified, all at state DHIA average or better for milk yield and days open. Baseline feed samples and ration information were collected for 2 mo and analyzed for phosphorus (P) and nitrogen (N). Feeds were analyzed monthly, and monthly DHIA milk yield, milk composition, …
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Development of an expert system for the evaluation of reproductive performance and management of Virginia dairy farms
… utilizes information from the user and from DHIA reproductive management reports developed by the Dairy Records Processing Center in Raleigh, NC. The reproductive reports are captured in a computer file and read by the expert system to identify problems of conception categorized by …
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Effects of within herd variation on the relationship between genetic evaluations and performance of offspring
… official Dairy Herd Improvement Association (DHIA) records from 20,380 and 34,000 herd-years, respectively, were used to compute herd-year means and within herd-year standard deviations for individual mature equivalent (ME) milk, fat, and fat percent. These herd-year means and within standard …
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Reasons Why Cows Were Removed From the SDSU Fairy Herd 1. Discriminant Analysis to Classify Cows with or without Reproductive Problems
… of cows from Dairy Herd Improvement Association (DHIA) and research herds have shown that a large portion of the cull cows were removed because of low production, reproductive problems, mastitis, sold for dairy purposes, and type related problems. Dairymen have indicated that low fertility is …
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Relationships between first lactation milk yield, first calving interval, herd life, lifetime milk production, and descriptive type subtraits in Holstein cattle
… Association of America was compared to DHIA production data to determine which of the type subtraits were related to first lactation production, first calving interval, herd life, and lifetime milk and fat yields. Variables other than type traits were expressed as deviations from the …
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Comparison of Neospora seroprevalence in Virginia dairy herds with high and low abortion rates
… participated in the study. Twelve herds had DHIA reported annual abortion rates of 6% or greater (high abortion rate herds) and twelve herds had abortion rates of 2% or less (low abortion rate herds). High abortion rate herds were each paired to a low abortion rate herd (control) herd within …
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An Evaluation of Feeding a Blend of Essential Oils and Cobalt Lactate to Lactating Dairy Cows
… by the Dairy Herd Improvement Association (DHIA) were significantly greater (P < 0.05) for cows fed EOC compared to cows fed Control for Phases 2 and 1 respectively. Both protein and lactose percentage and yield (kg) measured by DHIA were similar (P > 0.10) for cows fed EOC and Control. Milk …
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Effects of using an enzyme-linked immunosorbent assay to monitor the control of Staphylococcus aureus mastitis in dairy herds
… by 97%. ProStaph I was used to rapidly screen DHIA preserved milk samples in 10 Virginia cooperator herds. Herds were classified as high (>10% infected) or low prevalence (<10% infected). There were six high prevalence herds after the first test. Average prevalence of cows scoring Ab +2 and +3 …
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Importance of body conformation in predicting longevity and wearability of dairy cows
… of America from January, 1967 to June, 1974 and DHIA production data recorded by the U.S. Department of Agriculture from January, 1960 to May, 1974 were evaluated as progeny tests to ascertain the relationship between body conformation and longevity and wearability of dairy cows. Data for 788 …
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Heuristic Solution Approaches to the Solid Assignment Problem
The 3-dimensional assignment problem, also known as the Solid Assignment Problem (SAP), is a challenging problem in combinatorial optimisation. While the ordinary or 2-dimensional assignment problem is in the P-class, SAP which is an extension of it, is NP-hard. SAP is the problem of allocating n …
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The Double Edge: Contradictory Functions of Civil Society Organizations in the Tunisian Democratic Process
<p>“Democratic transition,” the act of becoming democratic, and “democratic consolidation,” the subsequent actions that solidify the achievement of becoming democratic, are two separate processes that go hand in hand. While several Arab Spring nations overthrew their dictators, fewer underwent a …
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Modelling-based design of anisotropic piezocomposite transducers and multi-domain analysis of smart structures
… coupled via the Arlequin method proposed by Ben Dhia. Solid, plate and beam finite elements for mechanical and for piezoelectric problems are presented. Via UF, higher order and piezoelectric elements can be formulated straightforwardly. These elements are combined in variable kinematic solutions …
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The transfer of modal content in translation
The present thesis seeks to examine the grammatico-pragmatic problem of translating modality from English into Arabic (two formally and genetically different languages) and vice versa, with the aim of suggesting tentative ways that would tackle such a problem for the Arab translator who finds …
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Essays on job search and retraining
This thesis comprises three essays in empirical labor economics. Broadly, the essays provide evidence on the existence and the effects of information barriers in situations of job search and retraining. Chapter 1 (coauthored with Esther Mbih) begins from the observation that little is known about …
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Cooperative formation and immigration: The case of cow-testing associations in the US dairy industry
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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The Influence of Artificial Insemination in Three Midwestern States
… these sires is exercised. Consideration of DHIA Sire Summary Lists indicates that these sires are being identified and that effective means of improving genetic merit may be available. A sire's value for dairy purposes is dependent on the quality of daughters he leaves. The measure of this …
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Genetic and Maternal Factors Underlying Early Milk Production and Their Influence on Calf Health
… colostrum samples from JE cows were sent to DHIA where compositional measurements were obtained (i.e. true protein, fat, lactose, SCS, solid non-fats). Lactoferrin concentration for JE colostrum samples was also determined via ELISA. Calf blood samples were collected within 72 h post-partum …