Optimal Economic Schedule for a Network of Microgrids With Hybrid Energy Storage System Using Distributed Model Predictive Control

Artículo Open Access en el sitio web el editor. Pago por publicar en abierto.In this paper, an optimal procedure for the economic schedule of a network of interconnected microgrids with hybrid energy storage system is carried out through a control algorithm based on distributed model predictive control (DMPC). The algorithm is specifically designed according to the criterion of improving the cost function of each microgrid acting as a single system through the network mode operation. The algorithm allows maximum economical benefit of the microgrids, minimizing the degradation causes of each storage system, and fulfilling the different system constraints. In order to capture both continuous/discrete dynamics and switching between different operating conditions, the plant is modeled with the framework of mixed logic dynamic. The DMPC problem is solved with the use of mixed integer linear programming using a piecewise formulation, in order to linearize a mixed integer quadratic programming problem.Ministerio de Economía, Industria y Competitivadad DPI2016-78338-RComisión Europea 0076-AGERAR-6-

Use of a liquid-crystal, heater-element composite for quantitative, high-resolution heat transfer coefficients on a turbine airfoil, including turbulence and surface roughness effects

Local heat transfer coefficients were measured along the midchord of a three-times-size turbine vane airfoil in a static cascade operated at roon temperature over a range of Reynolds numbers. The test surface consisted of a composite of commercially available materials: a Mylar sheet with a layer of cholestric liquid crystals, which change color with temperature, and a heater made of a polyester sheet coated with vapor-deposited gold, which produces uniform heat flux. After the initial selection and calibration of the composite sheet, accurate, quantitative, and continuous heat transfer coefficients were mapped over the airfoil surface. Tests were conducted at two free-stream turbulence intensities: 0.6 percent, which is typical of wind tunnels; and 10 percent, which is typical of real engine conditions. In addition to a smooth airfoil, the effects of local leading-edge sand roughness were also examined for a value greater than the critical roughness. The local heat transfer coefficients are presented for both free-stream turbulence intensities for inlet Reynolds numbers from 1.20 to 5.55 x 10 to the 5th power. Comparisons are also made with analytical values of heat transfer coefficients obtained from the STAN5 boundary layer code

United States of Banana: A Postcolonial Dramatic Fiction

This paper wants to be a recollection of the process of staging the play “United States of Banana”, based on the original text written by Puerto Rican author Giannina Braschi. This work has been widely praised by academics both in and outside the United States and has opened new spaces to reflect on the ideas that concern the Latino population living in the US. These literary expressions are the sign of a vital community that is slowly assuming a historical role in the shaping of the most powerful nation in the planet. Since I consider theater to be a social thermometer, I chose this play as my thesis project to testify about the state of affairs regarding the situation of Puerto Rico. Its lack of sovereignty and self-regulation constitute a metaphor about the foreign policy the government of the United States has exercised in many countries, but especially in Latin America. However, it is also time to set our own proposals over the table and abandon the paternalist model that justifies and supports our attitude of beneficiaries of the charities coming from the first world. In this play, characters from Classical literature become symbols of entire races and populations to polish a gigantic mirror in which we can look at ourselves. Despite its scathing humor and harrowing critique, the text helped us create a performative event in 6 which we all, creators and spectators, shared a common responsibility: that of contributing to making a world that is fairer and a society that finds hope more easily

Theoretical and Numerical Analysis of 3D Reconstruction Using Point and Line Incidences

We study the joint image of lines incident to points, meaning the set of image tuples obtained from fixed cameras observing a varying 3D point-line incidence. We prove a formula for the number of complex critical points of the triangulation problem that aims to compute a 3D point-line incidence from noisy images. Our formula works for an arbitrary number of images and measures the intrinsic difficulty of this triangulation. Additionally, we conduct numerical experiments using homotopy continuation methods, comparing different approaches of triangulation of such incidences. In our setup, exploiting the incidence relations gives both a faster point reconstruction and in three views more accurate.Comment: 27 pages, 5 Figures, 3 table

Neutrinos from microquasars

The jets of microquasars with high-mass stellar companions are exposed to the dense matter field of the stellar wind as well as to the photon densities found in the surrounding medium. Photopion and proton-proton interactions could then lead to copious production of neutrinos. In this work, we analyze the hadronic microquasar model, particularly in what concerns to the neutrino production. Limits to this kind of models using data from AMANDA-II are established. New constraints are also imposed upon specific microquasar models based on photopion processes. These are very restrictive particularly for the case of SS433, a microquasar for which the presence of accelerated hadrons has been already inferred from iron X-ray line observations.Comment: Talk presented at the V Microquasar Workshop, Beijing, China, June 5-13, 2004. Proceedings to appear in the Chinese Journal of Astronomy and Astrophysic

Use of CdS from Teaching-Laboratory Wastes as a Photocatalyst for the Degradation of Fluoroquinolone Antibiotics in Water

Laboratory wastes containing Cd2+ and water polluted by pharmaceuticals represent an environmental concern. In this work, a proof concept, consisting of the use of teaching-laboratory wastes to synthesize CdS and its subsequent use as a photocatalyst to degrade fluoroquinolone antibiotics, was developed. The CdS was prepared by extraction with thioacetamide and calcination (at 450 °C) and characterized using several techniques. The photocatalytic activity of the CdS, to degrade levofloxacin and norfloxacin, was tested, and the routes involved in the process and the primary transformations of the fluoroquinolones were established. Moreover, the ability of CdS-photocatalysis to eliminate levofloxacin in simulated matrices of fresh urine and hospital wastewater was evaluated. The characterization analyses indicated that the CdS semiconductor was synthesized successfully. Effectively, the CdS acted as a photocatalyst toward degradation of levofloxacin, involving the action of superoxide anion radical, holes, and singlet oxygen mainly. The process induced transformations on the methyl-piperazyl moiety, plus hydroxylation of the fluoroquinolone nucleus on levofloxacin. Additionally, CdS-photocatalysis was highly selective for the elimination of the target pollutant in both tested matrices. Our research indicated the good potentiality of recycling teaching-laboratory wastes to generate photocatalysts to degrade organic pollutants. This work was presented at 4° Congreso Colombiano de Procesos Avanzados de Oxidación (4CCPAOx)

El secreto bancario: los alcances de su flexibilizacin como requisito del ingreso de Chile a la Organizacion Economica de Cooperacion y Desarrollo (OCDE)

73 p. La siguiente tesis no es autorizada por el autor para su difusión en formato digitalEl siguiente trabajo trata principalmente del análisis a la figura del secreto bancario, su posible flexibilización como consecuencia de los requerimientos exigidos por la OCDE, para que Chile pueda formar parte de ésta. Esta investigación se desarrolla utilizando una metodología jurídico dogmática, además de realizar un análisis del proyecto de ley que modifica el actual artículo 62 del Código Tributario, estableciendo normas que permitan el acceso a la información bancaria por parte de la autoridad tributaria, facultando al Director nacional del Servicio de Impuestos Internos para que pueda requerir información relativa a operaciones bancarias para dar cumplimiento a un convenio internacional, compromisos de intercambio de información, como para satisfacción de su función fiscalizadora, determinando si el proyecto vulnera las garantías de un debido proceso y finalmente analizamos las implicancias del posible ingreso de Chile a la OCDE./ ABSTRACT: Following work analyzes, mainly, the banking secrecy legal figure, and its possible flexibilization as a consequence of OCDE’s demanded requirements in order to Chile become part of it. This research is developed using a legal dogmatic methodology through which banking secrecy understanding is expected, plus an actual Tribute Code 62th article modification law project analysis, establishing a frame within which the tribute authority can access the banking information, allowing the National Internal Revenue Service director so he can gather information related to banking operations in order to fulfill an international agreement, information exchange, to satisfy its controlling function, determining if the project breaks a due process guarantees and finally a possible membership of Chile into OCDE implications analysis

Neutrinos from Microquasars

The jets of microquasars with high-mass stellar companions are exposed to the dense matter field of the stellar wind as well as to the photon densities found in the surrounding medium. Photopion and proton-proton interactions could then lead to copious production of neutrinos. In this work, we analyze the hadronic microquasar model, particularly in what concerns to the neutrino production. Limits to this kind of models using data from AMANDA-II are established. New constraints are also imposed upon specific microquasar models based on photopion processes. These are very restrictive particularly for the case of SS433, a microquasar for which the presence of accelerated hadrons has been already inferred from iron X-ray line observations.Fil: Torres, Diego F.. Lawrence Livermore National Laboratory; Estados UnidosFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Mirabel Miquele, Igor Felix. Centre d’Etudes de Saclay; Franci