198,209 research outputs found
Eating quality of filet and round from grazing Holstein bulls and Limousine x Holstein Bulls and Heifers
No full textCrossbred Limousine x Holstein bulls and heifers may be an alternative to purebred Holstein bulls in organic beef production of young cattle because of the improved gain, carcass conformation and taste, but the fatness and texture of the crossbred bulls need to be improved through changes in the production strategy, especially feeding prior to slaughter, and in the pre and post mortem handling
Extensions and applications of the Tuza-Vestergaard theorem
No full textThe transversal number τ(H) of a hypergraph H is the minimum number of vertices that intersect every edge of H. A 6-uniform hypergraph has all edges of size 6. On 10 November 2000 Tuza and Vestergaard (2002) conjectured that if H is a 3-regular 6-uniform hypergraph of order n, then [Formula presented]. This conjecture was recently proven by the Henning and Yeo (2023) and is now called the Tuza-Vestergaard Theorem. In this paper we extend the Tuza-Vestergaard Theorem by relaxing the 3-regularity constraint and allowing bounded maximum degree 4. We present several applications of the Tuza-Vestergaard Theorem and its extension. We obtain best known upper bounds to date on the transversal number of a (general) 6-uniform hypergraph H of order n and size m. In particular, if H is a 4-regular 6-uniform hypergraph of order n, then we show that [Formula presented]. The Tuza constant c6 is defined by [Formula presented], where the supremum is taken over the class of all 6-uniform hypergraphs H. Since 1990 the exact value of c6 has yet to be determined. We show that [Formula presented], where [Formula presented] is conjectured to be the correct bound. Moreover we show that if G is a graph of order n with δ(G)≥6, then [Formula presented], where γt(G) denotes the total domination number of G and [Formula presented] is conjectured to be the correct bound. These bounds improve best known bounds to date.</p
Ratcheting in Renewable Resources Contracting
No full textReal life implies that public procurement contracting of renewable resources results in repeated interaction between a principal and the agents. The present paper analyses ratchet effects in contracting of renewable resources and how the presence of a resource constraint alters the “standard” ratchet effect result. We use a linear reward scheme to influence the incentives of the agents. It is shown that for some renewable resources we might end up both with more or with less pooling in the first-period compared to a situation without a resource constraint. The reason is that the resource constraint implies a smaller performance de-pendent bonus, which reduces the first-period cost from concealing information but at the same time the resource constraint may also imply that second-period benefits from this concealment for the efficient agent are reduced. In situations with high likelihood of first-period pooling, the appropriateness of applying lin-ear incentive schemes can be questioned.Political support function, political economy, environmental regula-tion, lobbyism, rent-seeking, taxation, auction, grandfathering, emission trad-ing, European Union, interest groups, industry, consumers, environmentalists
Bæredygtig oksekød - ammetantesystm
No full textI denne film fortæller Mogens Vestergaard fra Aarhus Universitet om produktion af tre bæredygtige økologiske oksekødsprodukter, hvor der i denne film er fokus på fodring og projektets erfaring med brug af ammetanter til kalvene
Factors causing a higher level of liver abscesses in organic compared with conventional dairy herds
No full textA data analysis based on the Danish Cattle Data Base shows that organic Holstein-Friesian cows have significantly higher frequencies of liver abscesses (LA) than conventional Holstein-Friesian cows (8% versus 5%). Based on a questionnaire among 91 organic dairy herds, a statistical analysis was made in order to identify which feeding and management factors that were related to the level of LA in the herds. Compared with conventional herds, the feed ration in organic herds had a lower energy and fatty acid level and a higher starch level. During summer season the organic herds had a lower level of digestible cell walls in the ration. Organic herds with a higher grazing level had a higher level of LA (P=0.012). Increasing levels of grain also tended to increase the level of LA. A herd-based analysis (644 herds) showed that lower minimum fat percentage and a higher variation in both fat and protein percentage corresponded with higher levels of LA. Organic herds generally had a 0.1 unit lower fat percentage. The results indicate that organic dairy cows, compared with conventional dairy cows, are more exposed to rumen acidosis and liver abscesses due to higher starch levels and unbalanced feeding strategies in particular during grazing
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A catalogue of optical to X-ray spectral energy distributions of z ≈ 2 quasars observed with Swift – I. First results
No full textWe present the Swift optical to X-ray spectral energy distributions (SEDs) of 44 quasars at redshifts z approximate to 2 observed by Swift, part of a larger program to establish and characterize the optical through X-ray SEDs of moderate-redshift quasars. Here, we outline our analysis approach and present preliminary analysis and results for the first third of the full quasar sample. Not all quasars in the sample are detected in X-rays; all of the X-ray-detected objects so far are radio loud. As expected for radio-loud objects, they are X-ray bright relative to radioquiet quasars of comparable optical luminosities, with an average alpha(ox) = 1.39 +/- 0.03 (where alpha(ox) is the power-law slope connecting the monochromatic flux at 2500 angstrom and at 2 keV), and display hard X-ray spectra. We find integrated 3000 angstrom-25 keV accretion luminosities of between 0.7 x 10(46) erg s (1) and 5.2 x 10(47) erg s (1). Based on single-epoch spectroscopic virial black hole mass estimates, we find that these quasars are accreting at substantial Eddington fractions, 0.1 less than or similar to L/L-Edd less than or similar to 1.Danish Council for Independent Research via grant [DFF 4002-00275]; Alfred P. Sloan Foundation; National Science Foundation; U.S. Department of Energy Office of ScienceThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]
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