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Search Results: 1 - 10 of 2896 matches for " Edgar Fuller "
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 Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.49B005 Abstract: In this work we describe the placement testing and student intake process at a large, land-grant university and show that long-standing general assessment exams administered during secondary schooling are not accurate predictors of success in university level mathematics courses. We then present results indicating that a placement exam administered during arrival as a first-year student provides a strong indicator of potential for student success in first-semester calculus.
 Mathematics , 1998, Abstract: Let T be the standard torus of revolution in R^3 with radii b and 1, 0
 Social Networking (SN) , 2013, DOI: 10.4236/sn.2013.21003 Abstract: In this work we propose a centrality measure for networks, which we refer to as Laplacian centrality, that provides a general framework for the centrality of a vertex based on the idea that the importance (or centrality) of a vertex is related to the ability of the network to respond to the deactivation or removal of that vertex from the network. In particular, the Laplacian centrality of a vertex is defined as the relative drop of Laplacian energy caused by the deactivation of this vertex. The Laplacian energy of network G with n vertices is defined as , where  is the eigenvalue of the Laplacian matrix of G. Other dynamics based measures such as that of Masuda and Kori and PageRank compute the importance of a node by analyzing the way paths pass through a node while our measure captures this information as well as the way these paths are “redistributed” when the node is deleted. The validity and robustness of this new measure are illustrated on two different terrorist social network data sets and 84 networks in James Moody’s Add Health in school friendship nomination data, and is compared with other standard centrality measures.
 PLOS ONE , 2012, DOI: 10.1371/journal.pone.0042033 Abstract: Adhesion of motile cells to solid surfaces is necessary to transmit forces required for propulsion. Unlike mammalian cells, Dictyostelium cells do not make integrin mediated focal adhesions. Nevertheless, they can move rapidly on both hydrophobic and hydrophilic surfaces. We have found that adhesion to such surfaces can be inhibited by addition of sugars or amino acids to the buffer. Treating whole cells with αlpha-mannosidase to cleave surface oligosaccharides also reduces adhesion. The results indicate that adhesion of these cells is mediated by van der Waals attraction of their surface glycoproteins to the underlying substratum. Since glycoproteins are prevalent components of the surface of most cells, innate adhesion may be a common cellular property that has been overlooked.
 John A. Fuller Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.26056 Abstract: The purpose of this study is to determine the type and level of assessment being done at selected music departments in higher education. A twelve-item questionnaire was developed and distributed to twenty-two universities. Sixteen universities were chosen because they are the peer institutions to the author’s campus. The others do not have music major but possess other strengths including several ensembles, many courses for students to choose from and in many cases, a minor in music. Cover letters and questionnaires were emailed to the Director of each Music Department. The cover letter explained the purpose of the questionnaire and asked that the director forward it to the individual in charge of assessment. Eleven universities responded. Results of this study indicate that assessment is going on in higher education in music. Although there were only eleven institutions involved in the study, every responding university indicated that they were doing some kind of assessment in music. The degree of assessment varied from campus to campus. Assessment training and support was limited. But, eleven music departments nationwide feel the need (and responsibility) to examine what and how they are teaching and then to come up with decisions on how to improve their teaching. Further, they feel that implementation of reviewed assessment techniques will improve students’ learning.
 Open Journal of Discrete Mathematics (OJDM) , 2012, DOI: 10.4236/ojdm.2012.24026 Abstract: This article presents a generalization of the standard art gallery problem to the case where the sides of the gallery are continuous curves which are limits of polygonal arcs. The allowable limiting processes for such generalized art galleries are defined. We construct an art gallery in which one side is the Koch fractal and the other sides are three sides of a rectangle. The appropriate measure of coverage by guards is not the total number of guards but, rather, the guards-to-side ratio. We compute this ratio for the cases of shallow and deep versions of the Koch fractal art gallery.
 American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.43063 Abstract: Investigation was made to confirm the stability of drought and salt stress tolerance in cauliflower (Brassica oleracea var.botrytis) mutants after regeneration and micropropagation. The N-nitroso-N-ethyleurea (NEU) and N-nitroso-N-methylurea (NMU) induced mutants of cauliflower were created and screened for drought and salt stress tolerance. The highly tolerant mutants were selected, regenerated by tissue culture techniques, screened again for drought and salt tolerance under in-vitro and in-vivo conditions, correlated the response of in-vitro and in-vivo plants within a clone. Free proline levels in clones were correlated with stress tolerance. Results confirmed the persistence of mutations in clones with enhanced resistance levels to stresses over control plants. The regenerated in-vitro and in-vivo plants within a clone showed a positive significant correlation for drought (R2 = 0.663) and salt (R2 = 0.647) resistance that confirms the
 Maria Fuller Lipids in Health and Disease , 2010, DOI: 10.1186/1476-511x-9-113 Abstract: Sphingolipids have become the subject of a number of biochemical processes and as such have earned the topical label of "bioactivity" [1]. Sphingolipids are also implemented in a number of disease states not only when their metabolism is affected, but when seemingly unrelated cellular homeostatic mechanisms are imbalanced. Sphingolipids are amphipathic molecules with varying degrees of hydrophobic and hydrophilic properties. The hydrophobic region comprises a long-chain base, sometimes referred to as a sphingoid base, which is linked through an amide bond to a fatty acid (Figure 1). The sphingoid base is usually 18 carbons in length, with the C20 being somewhat less common (reviewed in [2]). The hydrophilic region in the simplest sphingolipids can consist of just hydroxyl groups, whereas the more complex sphingolipids have phosphates and sugar residues attached. Given there are at least five different sphingoid bases present in mammalian cells with more than 20 arrangements of fatty acids differing in length of the alkyl chain and level of both saturation and hydroxylation, coupled with more than 500 carbohydrate structures reported in the glycosphingolipids, the number of possible structures is considerable [1,3]. Although a paradigm of combinatorial biosynthesis has been described to address the high degree of complexity [4], how cells deal with such lipid complexity is a central biochemical question. This can be taken to an extra dimension when considering the aberrations that can occur in a cell's management of lipids and how this is linked to disease.Human diseases caused by alterations in the metabolism of sphingolipids are generally disorders of their degradation [5]. Traditionally the hallmark is the sphingolipidoses, named after the lipids that accumulate. They are a group of relatively rare inborn errors of metabolism caused by gene defects encoding proteins in the lysosomal degradation of sphingolipids [6]. Consequently the sphingolipid substrate for the
 Estudios y perspectivas en turismo , 2011, Abstract: this essay analyses the impact of a project of sustainable tourism that reshaped the image of a rural district to transform it in a tourist product. a peculiarity of this case is that the local government, an ngo, several state agencies and the local population joined efforts to transform this rural community under the supposition that tourism would be a new source of jobs and income to its impoverished inhabitants. this a case that allows pondering on the limits and possibilities of rural communitarian tourism and the model of management that it proposes.
 Maderas. Ciencia y tecnología , 2005, DOI: 10.4067/S0718-221X2005000300004 Abstract: the need for a drying stress indicator has previously been stated with some research in the past to this means. given the recent successes in achieving this goal through monitoring shrinkage, the refinement and further understanding of the process was needed, specifically, the influence that penetration of the mount-foot had on the shrinkage data. four different lvdtmounts were investigated in an attempt to acquire this information. the results indicated that the depth of penetration influenced the absolute value of shrinkage measured but did not influence determination of when peak stress occurred. the mounts mounted on the face of the board displayed the most stable and informative results
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