Institution
Instituto Tecnológico de Buenos Aires
About: Instituto Tecnológico de Buenos Aires is a based out in . It is known for research contribution in the topics: Online analytical processing & Data warehouse. The organization has 319 authors who have published 631 publications receiving 6722 citations. The organization is also known as: Buenos Aires Institute of Technology & ITBA.
Topics: Online analytical processing, Data warehouse, Control theory, Nonlinear system, Formal specification
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, the main focus is made on electrolysis, a mature procedure, and some developed proposals as previous steps to the hydrogen economy are presented, while some lines of research to improve alkaline electrolysis technology are commented.
Abstract: The renewed concern for the care of the environment has led to lower emissions of greenhouse gases without sacrificing modern comforts. Widespread proposal focuses on energy produced from renewable sources and its subsequent storage and transportation based on hydrogen. Currently, this gas applies to the chemical industry and its production is based on fossil fuels. The introduction of this energy vector requires the development of environmental-friendly methods for obtaining it. In this paper, existing techniques are just presented and the main focus is made on electrolysis, a mature procedure. In turn, some developed proposals as previous steps to the hydrogen economy are presented. Finally, some lines of research to improve alkaline electrolysis technology are commented.
293 citations
••
TL;DR: It is established that a nested pattern of contacts is the best possible one as far as robustness is concerned, but only when the least linked species have the greater probability of becoming extinct.
292 citations
••
TL;DR: It is shown that in systems of very different nature and scale -including sheep herds, pedestrian crowds, assemblies of grains, and colloids- the probability distribution of time lapses between the passages of consecutive bodies exhibits a power-law tail with an exponent that depends on the system condition.
Abstract: When a large set of discrete bodies passes through a bottleneck, the flow may become intermittent due to the development of clogs that obstruct the constriction. Clogging is observed, for instance, in colloidal suspensions, granular materials and crowd swarming, where consequences may be dramatic. Despite its ubiquity, a general framework embracing research in such a wide variety of scenarios is still lacking. We show that in systems of very different nature and scale -including sheep herds, pedestrian crowds, assemblies of grains and colloids- the probability distribution of time lapses between the passages of consecutive bodies exhibits a power-law tail with an exponent that depends on the system condition. Consequently, we identify the transition to clogging in terms of the divergence of the average time lapse. Such a unified description allows us to put forward a qualitative clogging state diagram whose most conspicuous feature is the presence of a length scale qualitatively related to the presence of a finite size orifice. This approach helps to understand paradoxical phenomena, such as the faster-is-slower effect predicted for pedestrians evacuating a room and might become a starting point for researchers working in a wide variety of situations where clogging represents a hindrance.
261 citations
••
TL;DR: Helbing et al. as mentioned in this paper experimentally show that the FIS effect occurs in three different systems of discrete particles flowing through a constriction: humans evacuating a room, a herd of sheep entering a barn, and grains flowing out a 2D hopper over a vibrated incline.
Abstract: The "faster-is-slower" (FIS) effect was first predicted by computer simulations of the egress of pedestrians through a narrow exit [D. Helbing, I. J. Farkas, and T. Vicsek, Nature (London) 407, 487 (2000)]. FIS refers to the finding that, under certain conditions, an excess of the individuals' vigor in the attempt to exit causes a decrease in the flow rate. In general, this effect is identified by the appearance of a minimum when plotting the total evacuation time of a crowd as a function of the pedestrian desired velocity. Here, we experimentally show that the FIS effect indeed occurs in three different systems of discrete particles flowing through a constriction: (a) humans evacuating a room, (b) a herd of sheep entering a barn, and (c) grains flowing out a 2D hopper over a vibrated incline. This finding suggests that FIS is a universal phenomenon for active matter passing through a narrowing.
133 citations
••
TL;DR: The aggregation rates, aggregate size and aggregate morphology of NanoTiO2 under the presence of inert electrolytes, divalent cations, and these two combined with natural organic matter are studied to provide a comprehensive investigation of the phenomena of interaction of nanomaterials and natural waters and elucidate some of the conflicting information reported in the literature.
122 citations
Authors
Showing all 319 results
Name | H-index | Papers | Citations |
---|---|---|---|
Jorge H. Medina | 76 | 291 | 20422 |
Osvaldo A. Rosso | 49 | 241 | 8770 |
Rafael Garcia | 41 | 263 | 5957 |
Federico Milano | 40 | 287 | 7151 |
Alejandro A. Vaisman | 27 | 119 | 3039 |
Fernando D. Bianchi | 27 | 74 | 3320 |
Daniel Borrajo | 26 | 168 | 2619 |
Daniel R. Parisi | 22 | 48 | 1790 |
Jorge Stripeikis | 20 | 35 | 821 |
Alvaro N. Barbeira | 20 | 47 | 3032 |
Marcelo F. Frias | 19 | 81 | 980 |
Carlos Sarraute | 19 | 102 | 1092 |
Diana Alejandra Estenoz | 17 | 82 | 875 |
Marcelo Risk | 16 | 71 | 874 |
Paola Verónica Britos | 15 | 110 | 765 |