The reversible electrical variations hitherto described for plants and animals consist in a reversible loss of positive potential at a stimulated spot by which it becomes more negative. In this paper we describe changes which consist in a reversible loss of negative potential at a stimulated spot whereby it becomes more positive. We suggest that this be called a positive variation. The stimulat...

I was asked by the organisers to present some aspects of Deformation Quantization. Moshé has pursued, for more than 25 years, a research program based on the idea that physics progresses in stages, and one goes from one level of the theory to the next one by a deformation, in the mathematical sense of the word, to be defined in an appropriate category. His study of deformation theory applied to...

In addition to their roles in organizing the actin cytoskeleton, members of the Rho family of GTP-binding proteins have recently been implicated in a plethora of other functions, including the activation of kinase cascades and transcription factors, and the control of endocytosis and secretion. Alongside this expansion is proposed functions has been the identification of multiple target protein...

Genome structural variations (SVs) in the human genome are defined as DNA sequence polymorphisms of at least a few dozen or few hundred bases in length and include deletions, duplications, inversions, translocation, retroelement insertions, and more complex rearrangements that could be thought of as consisting of multiple fragments from the just listed categories. More bases in a personal genom...

We consider 9 natural tightness conditions for topological spaces that are all variations on countable tightnes and investigate the interrelationships between them. Several natural open problems are raised.

the best valves currently in use. A linearized rate is calculated as the number of events divided by total patientyears, which is then multiplied by 100 to convert the rate to units of “events per 100 years” or “percent per year.” For mechanical valves, the OPC (percent/year) is estimated at 0.8 for valve thrombosis and 3.0 for thromboembolism. For biologic valves, the OPC (percent/year) is est...

In constructive mathematics, several nonequivalent notions of finiteness exist. In this paper, we continue the study of Noetherian sets in the dependently typed setting of the Agda programming language. We want to say that a set is Noetherian, if, when we are shown elements from it one after another, we will sooner or later have seen some element twice. This idea can be made precise in a number...

Coursebooks discussing graph algorithms usually have a chapter on minimum spanning trees. It usually contains Prim’s and Kruskal’s algorithms [1, 2] but often lacks other applications. This type of problem is rarely present at informatics competitions or in tests in secondary or higher level informatics education This article is aimed at describing some competition tasks that help us prove that...