DEFENSE MECHANISM ON THE MAIN CHARACTER DEPICTED IN THE BABADOOK MOVIE

El presente trabajo de investigación lleva como título “DISEÑO DE CONCRETO PERMEABLE, PARA PAVIMENTOS RÍGIDOS, UTILIZANDO PIEDRA HUSO 67 Y ARENA GRUESA DE LA CANTERA LA PODEROSA, PARA LA CIUDAD DE AREQUIPA”, la investigación tiene como objetivo experimentar con diferentes diseños de mezcla para así comparar resultados y aplicarlos en pavimentos rígidos. Este documento presenta los resultados de una investigación realizada en el laboratorio de Ingeniería Civil de la Universidad Católica de Santa María, Facultad de Arquitectura e Ingenierías Civil y del Ambiente, Escuela Profesional de Ingeniería Civil. Se elaboraron 18 diseños de mezclas utilizando cemento portland tipo IP, agua potable, agregado de la cantera la Poderosa de la ciudad de Arequipa, aditivos de las marcas SIKA Viscocrete 1110 y EUCO Neoplast 8500 HP, en distintas combinaciones y dosificaciones. Seguidamente, para cada diseño de mezcla se prepararon cilindros y vigas de prueba, para posteriormente realizar ensayos de resistencia a compresión, flexión, tensión indirecta, desgaste y permeabilidad, para así determinar de esta manera el diseño de mezcla con el mejor comportamiento ante estos esfuerzos. Luego se analizaron los diferentes resultados obtenidos estadísticamente y se escogió el diseño de mezcla óptimo que cumpla con los requisitos requeridos para ser utilizado en el diseño de pavimento rígido permeable. Finalmente, se procedió a hacer el diseño de una losa demostrativa usando los parámetros necesarios del terreno y las condiciones de tráfico que soportará. En suma, la investigación expresa el diseño de mezcla del concreto permeable, las propiedades y características del mismo, las consideraciones que se deben de tomar en cuenta para su uso en pavimentos permeables en la ciudad de Arequip

Tailoring Three-Point Functions and Integrability

We use Integrability techniques to compute structure constants in N=4 SYM to leading order. Three closed spin chains, which represent the single trace gauge-invariant operators in N=4 SYM, are cut into six open chains which are then sewed back together into some nice pants, the three-point function. The algebraic and coordinate Bethe ansatz tools necessary for this task are reviewed. Finally, we discuss the classical limit of our results, anticipating some predictions for quasi-classical string correlators in terms of algebraic curves.Comment: 52 pages, 6 figures. v2: Typos corrected, references added and update

Synthesis and properties of novel macrocycles and related chromophoric benzenoid compounds

The synthesis and properties of some macrocyclic compounds of interest are presented. Resorcinarenes with functionalized conjugated rigid rods made of oligo-p-phenylenes would lead to an entirely new class of functional, soluble, well-defined architectures impacting a variety of multidisciplinary research efforts. The general synthetic design described in this document could be readly extrapolated to include other electronic systems such as heteroaromatics and polyenes. An extensive collaborative study of chromophore formation in resorcinarene solutions is also described here. The study reveals that upon oxidation, the reversible conversion to acyclic precursors occur first, and then these precursors undergo oxidation to quinoid-type compounds (xanthenes). The understanding of the mechanism of chromophore formation allowed us to design selective receptors for carbohydrates and the development of post-column selective reagents for the detection of mono- and oligosaccharides. This latter work is still in progress and the preliminary studies are described here. In another study involving macrocyclic architectures, tiliacorinine, an alkaloid, which consists of five rings forming a macrocycle exhibits a rare H-H spin coupling in its 1H NMR. Molecular modeling was used to determine the spatial relationship between the protons involved. Fluorinated [2,2]p-cyclophanes have been attracting increased attention. Poly(p-xylylene) polymers are materials of current technological interest. An obstacle to the commercialization of these polymers is the multistep syntheses required to obtain the fluorinated monomers. We describe a two-step synthesis of the tetrafluoro[2,2]p-cyclophanes. Another family of compounds, the fullerenes, was studied. Authors of a recent communication about the isolation and characterization of what was called the missing isomer of C60O postulated that this isomer could be present during the epoxidation of C60. Our HPLC and 1H NMR studies of the epoxidation of C60 revealed that there is no other isomer besides the epoxide in the photooxigenation of C60

Time-variant failure probability of critical slopes under strong rainfall hazard including mitigation effects

Se presenta una formulación probabilista para evaluar el nivel de seguridad de taludes sujetos a lluvias intensas.The time-variant failure probability for critical slopes under strong rainfalls, which cause reductions on the soil shear strength, is calculated and compared to the target failure probability. The soil properties and the rainfall characteristics are considered as random and the correlation between rainfall intensity and duration is included to assess the impact of water infiltration on the slope failure probability. The failure probability, defined as the probability that the safety factor is less than 1, is calculated through a Monte Carlo simulation process. The paper emphasizes the importance of the time during the water infiltration into the soil, as the rainfall sequence occurs. The target failure probability, derived from the minimum expected life-cycle cost, is compared to the slope failure probability to decide if the slope requires mitigation measures. If mitigation is required, the slope model is modified and a new annual failure probability is calculated. The slope annual failure probability, for 3 sites under strong rainfall hazard, is found to be around 0.78. However, by introducing mitigation actions, the failure probability reduces to 0.037. The slope failure probability allows for the risk-based prioritization of slopesConacyt, Problemas Nacionales, proyecto 24778