University of Arkansas

About: University of Arkansas is a education organization based out in Fayetteville, Arkansas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 17225 authors who have published 33329 publications receiving 941102 citations. The organization is also known as: Arkansas & UA.

Development of a phosphorus index for pastures fertilized with poultry litter--factors affecting phosphorus runoff.

Abstract: Currently, several state and federal agencies are proposing upper limits on soil test phosphorus (P), above which animal manures cannot be applied, based on the assumption that high P concentrations in runoff are due to high soil test P. Recent studies show that other factors are more indicative of P concentrations in runoff from areas where manure is being applied. The original P index was developed as an alternative P management tool incorporating factors affecting both the source and transport of P. The objective of this research was to evaluate the effects of multiple variables on P concentrations in runoff water and to construct a P source component of a P index for pastures that incorporates these effects. The evaluated variables were: (i) soil test P, (ii) soluble P in poultry litter, (iii) P in poultry diets, (iv) fertilizer type, and (v) poultry litter application rate. Field studies with simulated rainfall showed that P runoff was affected by the amount of soluble P applied in the fertilizer source. Before manure applications, soil test P was directly related to soluble P concentrations in runoff water. However, soil test P had little effect on P runoff after animal manure was applied. Unlike most other P indices, weighting factors of the P source components in the P index for pastures are based on results from runoff studies conducted under various management scenarios. As a result, weighting factors for the P source potential variables are well justified. A modification of the P index using scientific data should strengthen the ability of the P index concept to evaluate locations and management alternatives for P losses.

Discovery of stable skyrmionic state in ferroelectric nanocomposites

Abstract: Non-coplanar swirling field textures, or skyrmions, are now widely recognized as objects of both fundamental interest and technological relevance. So far, skyrmions were amply investigated in magnets, where due to the presence of chiral interactions, these topological objects were found to be intrinsically stabilized. Ferroelectrics on the other hand, lacking such chiral interactions, were somewhat left aside in this quest. Here we demonstrate, via the use of a first-principles-based framework, that skyrmionic configuration of polarization can be extrinsically stabilized in ferroelectric nanocomposites. The interplay between the considered confined geometry and the dipolar interaction underlying the ferroelectric phase instability induces skyrmionic configurations. The topological structure of the obtained electrical skyrmion can be mapped onto the topology of domain-wall junctions. Furthermore, the stabilized electrical skyrmion can be as small as a few nanometers, thus revealing prospective skyrmion-based applications of ferroelectric nanocomposites.

Forums for management information systems scholars

Abstract: hat is " scholarly nzsearch " and which pub& cation outlets are considered 'best " ? In any academic discipline, the answers to these questions ate sought by:. Selection, promotion, and tenure committees as they seek to secure and retain the best possible individuals for thar faculty [5,151; l Researchers, as they seek to determme appropriate outlets for their research findings [5,6, 151; l Individuals seelung to identify the significant research streams in an academxc disciphne [25]; l Journal editors and assoaates as they seek to raise the quality of their journal to the highest possible l&l; I l The academic discipline in question as it seeks to gain an identity of its own, especially if it is a relatively young field [ 11, 251; l Students of the discipline as they seek to gain an understanding of what the discipline encompasses [6, 11,251; and l Librarians as they seek to wisely invest their ever-decreasing funds. Borrowing from the vernacular of consumer behavior theory, these constituents all have an interest in the " consumption " of knowledge. As with any consumption decision, limited resources dictaw that decisions be made concerning which " products " to consume. Thus, in the academic setting, this consumption decision concerns determining the bestjournals to further the discipline [15]. From the demand perspective, consumers of knowledge (e.g., researchers, individuals interested in the field, libraries) wish to invest their time and money economically, consuming the best material possible. On the supply side, producers of knowledge (e.g., researchers,journal editors, associates) wish to produce material that best meets consumer demand. Thus, many constituents have a definite interest in the determination of the relevance of publication outlets in a particular discipline. This study was undertaken to determine the important publishing journals and/or other outlets for management information systems (MIS) faculty. The MIS faculty were viewed as expert consumers of MIS research. In particular, three dimensions of each expert's background were considered important: the expert's education, role orientation, and academic lifestyle. The impact of these dimensions was studied to determine their influence on MIS faculty perception of publishing journals. Finally, presenting the results within an analytically sound framework will permit future researchers in MIS forums to use this study's model to better present their findings. Previous pertinent research done on potential MIS research forums and factors influencing their results are assessed and discussed in the following subsections. In 1983, Hamilton and …