A Biomorphic model for automated cloud adaptation

Cloud computing is one of the most discussed areas in computer science in the last years. Although there is an extensive amount of research covering this field, the field of bio-inspired cloud computing is underinvestigated when compared to the general research area. This study tries to find answers on how a biomorphic model can be implemented in the cloud in order to achieve adaptive cloud behaviour. The process of cellular differentiation where cells transform from one type to another, is chosen to be the foundation model for a developed technical model. We define analogies to the cloud where stem cells are blank servers and web servers are cells with a specific function. With a combination of configuration management, version control and cloud deployment systems, an imitation of this biological process is applied in the cloud. The use of automated cloud scaling as a case of adaptive behaviour is the main goal of the research. Two different approaches have been developed for mapping the biological model to the cloud. The first approach consists of a prototype where the signal detection and node activation is being triggered by using the concept of random generated timers. The second approach is based on the concept of random seeds which are used to coordinate the transformation procedure. The project results were able to adapt the cloud based on current needs, with each prototype having its advantages and disadvantages over the other

Sharp Estimates of the Embedding Constants for Besov Spaces bs p,q, 0 < p < 1

Sharp estimates are obtained for the rates of blow up of the norms of embeddings of Besov spaces bs p,q in Lorentz spaces as the parameters approach critical values. In [8] the case 1 _ p < 1 was investigated. The case 0 < p < 1 of the present paper requires different methods as the pointwise estimates established are different and the interpolation argument used in [8] is no longer available

Deux sites de l’âge du Bronze final IIb à Nice (Alpes-Maritimes)

Deux sites du Bronze final IIb ont été anciennement découverts sur la Colline du Château à Nice, le premier qui correspond à un habitat de plein air sur le plateau même et le second dans la falaise le bordant où une grotte sépulcrale à inhumations sera réutilisée ultérieurement par un habitat riche en faune alimentaire. L’intérêt est aussi de présenter, dans une région qui manque de références pour cette période, une série céramologique du Bronze final IIb.Two late Bronze Age sites from Nice (Alpes-Maritimes). This paper presents two late Bronze Age sites that had been discovered on the castle hill in Nice. The first is an open-air habitat on the plateau, and the second is on the adjacent cliff and comprises a cave burial with inhumations that subsequently revealed a site that was rich with animal food resources. This paper also presents a ceramic assemblage for a region that lacks such data for this period

Reinvestigation of the roles of the carboxyl groups of glutathione with yeast glyoxalase I : Implications as to the mechanism and coenzymic role of glutathione

A number of carboxyl-substituted s-blocked glutathiones have been shown to be competitive inhibitors of yeast glyoxalase I at 25[deg]C, pH 6.6. Amidation of the glycyl carboxyl group of S-(p-bromobenzyl)glutathione has no appreciable effect on binding whilst methylation reduces binding by 8.9-fold, indicating a steric constraint and the possible presence of a hydrogen bond in this region of the enzyme. Amidation of both carboxyl groups of S-(p-bromobenzyl)glutathione reduces binding significantly by 237-fold; this result agrees with electrostatic interaction of the Glu COO- group with a group located within the enzyme surface as opposed to the Gly COO- group, previously proposed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/26104/1/0000180.pd

Long Tailed Maps as a Representation of Mixed Mode Oscillatory Systems

Mixed mode oscillatory (MMO) systems are known to exhibit some generic features such as the reversal of period doubling sequences and crossover to period adding sequences as bifurcation parameters are varied. In addition, they exhibit a nearly one dimensional unimodal Poincare map with a longtail. We recover these common features from a general class of two parameter family of one dimensional maps with a unique critical point that satisfy a few general constraints that determine the nature of the map. We derive scaling laws that determine the parameter widths of the dominant windows of periodic orbits sandwiched between two successive states of RL^k sequence. An example of a two parameter map with a unique critical point is introduced to verify the analytical results.Comment: 13 pages and 8 figure

Random Convex Hulls and Extreme Value Statistics

In this paper we study the statistical properties of convex hulls of $N$ random points in a plane chosen according to a given distribution. The points may be chosen independently or they may be correlated. After a non-exhaustive survey of the somewhat sporadic literature and diverse methods used in the random convex hull problem, we present a unifying approach, based on the notion of support function of a closed curve and the associated Cauchy's formulae, that allows us to compute exactly the mean perimeter and the mean area enclosed by the convex polygon both in case of independent as well as correlated points. Our method demonstrates a beautiful link between the random convex hull problem and the subject of extreme value statistics. As an example of correlated points, we study here in detail the case when the points represent the vertices of $n$ independent random walks. In the continuum time limit this reduces to $n$ independent planar Brownian trajectories for which we compute exactly, for all $n$, the mean perimeter and the mean area of their global convex hull. Our results have relevant applications in ecology in estimating the home range of a herd of animals. Some of these results were announced recently in a short communication [Phys. Rev. Lett. {\bf 103}, 140602 (2009)].Comment: 61 pages (pedagogical review); invited contribution to the special issue of J. Stat. Phys. celebrating the 50 years of Yeshiba/Rutgers meeting

Tight binding inhibitors of xanthine oxidase

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24536/1/0000815.pd