Parallel Partial Stabilizing Algorithms for Large Linear Control Systems

In this paper we present parallel algorithms for stabilizing large linear control systems on multicomputers. Our algorithms first separate the stable part of the linear control system and then compute a stabilizing feedback for the unstable part. Both stages are solved by means of the matrix sign function which presents a high degree of parallelism and scalability.The experimental results on an IBM SP2 platform show the performance of our approach.     

Interaction of the human intestinal microbiota with the release of bound phenolic compounds in chickpea (Cicer arietinum L.)

The objective of this work was to release bound phenolic compounds (PC) from chickpea by the interaction of the microbiota of a volunteer and to identify the enzymes implied to deliver these PC. The highest amount of PC was released at 12 and 24 h (16.8–18.5 mg GAE/g). Higher antioxidant capacity was observed in these hours through 2,20-azino-bis-(3ethylbenzothiazoline-6-sulfonic acid), 2,2-diphenyl-1-picrylhydrazyl, ferric reducing antioxidant power and 2,´2.Azobis (2 methylpropionamidine) techniques. Escherichia, Klebsiella, Bacteroides and Veillonella were some genera identified in the microbiota implied in delivered PC. The principal PC identified by ultra performance liquid chromatography–mass spectrometry were flavonoids. Proteomic analysis identified hundreds of proteins from the intestinal microbiota after 12 h of fermentation, including enzymes related to the release of bound PC from chickpea such as pectin esterase. Therefore, this enzyme could be used in other food sources for the release of PC bound to the food matrix and thus take advantage of their bioactive benefits.     

Visual analytics for spatiotemporal events

Multimedia Tools and Applications - Crimes, forest fires, accidents, infectious diseases, or human interactions with mobile devices (e.g., tweets) are being logged as spatiotemporal events. For...     

Normalization Results for Typeable Rewrite Systems

In this paper we introduce Curryfied term rewriting systems, and a notion of partial type assignment on terms and rewrite rules that uses intersection types with sorts andω. Three operations on types—substitution, expansion, and lifting—are used to define type assignment and are proved to be sound. With this result the system is proved closed for reduction. Using a more liberal approach to recursion, we define a general scheme for recursive definitions and prove that, for all systems that satisfy this scheme, every term typeable without using the type-constantωis strongly normalizable. We also show that, under certain restrictions, all typeable terms have a (weak) head-normal form, and that terms whose type does not containωare normalizable.     

From input to output: the potential of parallel corpora for CALL

The aim of this paper is to illustrate the potential of a parallel corpus in the context of (computer-assisted) language learning. In order to do so, we propose to answer two main questions (1) what corpus (data) to use and (2) how to use the corpus (data). We provide an answer to the what-question by describing the importance and particularities of compiling and processing a corpus for pedagogical purposes. In order to answer the how-question, we first investigate the central concepts of the interactionist theory of second language acquisition: comprehensible input, input enhancement, comprehensible output and output enhancement. By means of two case studies, we illustrate how the abovementioned concepts can be realized in concrete corpus-based language learning activities. We propose a design for a receptive and productive language task and describe how a parallel corpus can be at the basis of powerful language learning activities. The Dutch Parallel Corpus, a ten-million word sentence aligned and annotated parallel corpus, is used to develop these language tasks.     

Hydrodynamic conditions induce changes in secretion level and glycosylation patterns of Von Willebrand factor (vWF) in endothelial cells

The effect of low-speed agitation on the level of secretion and glycosylation patterns of the Von Willebrand factor in endothelial cells cultured in 6-cm Petri dishes located in a rotating platform was studied. In this simple system, complex and non-intuitive velocity fields arise. As revealed by simple calculations of tangential velocities and CFD analysis, flow behavior strongly varies as a function of radial distance and rotational velocity. We found significant differences in both secretion level and glycosylation extent and completeness, as a result of relatively small changes in rotational speed. Results obtained support the hypothesis that differences in hydrodynamic conditions may induce important changes in the secretion and assembly of glycoproteins in mammalian cell cultures.