Certain minimal varieties are set-theoretic complete intersections

We present a class of homogeneous ideals which are generated by monomials and binomials of degree two and are set-theoretic complete intersections. This class includes certain reducible varieties of minimal degree and, in particular, the presentation ideals of the fiber cone algebras of monomial varieties of codimension two

Rebuilding along the Rappahannock: The Methodologies of Urban Archaeological Survey in Fredericksburg and Beyond

**I can definitely do an abstract if the other articles in the Fredericksburg volume have one!*

Left Out in the Cold: Archaeology of the Sentry Box Ice House and the Ice Business in Fredericksburg, Virginia

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Computer use by students with disabilities perceived advantages, problems and solutions

Titre de l'écran-titre (visionné le 4 oct. 2013)Bibliogr

Learning technologies : students with disabilities in postsecondary education : final report to the Office of learning technologies

Également disponible en version électroniqueBibliogr.: p. 181-19

Arithmetical rank of the cyclic and bicyclic graphs

We show that for the edge ideals of the graphs consisting of one cycle or two cycles of any length connected through a vertex, the arithmetical rank equals the projective dimension of the corresponding quotient ring

An Introduction to the Viable Systems Approach and its Contribution to Marketing

Organizations are increasingly challenged by dynamism and turbulence that determine conditions of complexity in decision making. The aim of this paper is to highlight the need for a general frame of reference for management and marketing and to justify why adopting a systems approach is adequate at both theoretical and practical level. Specifically, the purpose of this paper is to explain why a systems approach is needed to understand business and market dynamics, and why the VSA may represent a good integrator of management and marketing theories and practices. The paper begins with a brief review of systems theories that have been proposed in the general context of management and marketing. It proceeds by illustrating the fundamental principles and concepts of the VSA and its contribution to marketing. The paper closes by discussing future research avenues and suggesting implications for researchers and practitioners

On the distribution and characteristics of isozyme expression in Mycoplasma, Acholeplasma, and Ureaplasma species.

A summary of a survey of three genera of mycoplasmatales (Mycoplasma, Acholeplasma, and Ureaplasma) for isozyme expression is presented. Isozyme analysis of mycoplasmas has been employed in at least three distinct areas: (1) as genetic markers for identification, individualization, and taxonomic classification; (2) as markers for cell culture contamination; and (3) as a qualitative measure of the operative metabolic pathways in the diverse species. We have found five ubiquitous enzymes: purine nucleoside phosphorylase, adenylate kinase, inorganic pyrophosphatase, dipeptidase, and esterase. Three enzymes, glucose-6-phosphate dehydrogenase, phosphogluconate dehydrogenase, and superoxide dismutase, were restricted to Acholeplasma species and were not detected in Mycoplasma or Ureaplasma. Four glycolytic enzymes, glucose phosphate isomerase, triose phosphate isomerase, glyceraldehyde-3-phosphate dehydrogenase, and lactate dehydrogenase, were restricted to those species of Mycoplasma and Acholeplasma capable of glucose fermentation. Two of these glycolytic enzymes, glucose phosphate isomerase and lactate dehydrogenase, were detected in serovars I and II of U. urealyticum, which is inconsistent with the non-glycolytic activity in this genus