Percepción visual. Una discusión urbana y arquitectónica

Este texto describe el paso por un camino: caminar e investigar por Curitiba de julio a septiembre de 2012. Este andar, nada medido, motivo inicial de esta reflexión, posibilita recuperar el concepto de percepción, para decir que el camino es dinámico y teórico. Es dinámico, porque, camino, camino por las plazas, los parques, las calles, en el transporte de la ciudad. Es teórico, porque camino por los textos de teorización de la percepción visual

Implementation of Field Oriented Control in Simulink

Indukční stroje jsou jedním z nejpoužívanějších elektrických strojů v mnoha průmyslových a dopravních aplikacích. Je proto důležité mít zařízení pro jejich ovládání. Naproti tomu, DC stroje je možné řídit pomocí mnohem jednodušších schémat, ale kvůli jejich technickým nevýhodám se v současnosti nejeví jako nejlepší volba pro průmyslové použití. Pro řízení rychlosti a točivého momentu indukčních strojů bylo vyvinuto mnoho řídicích strategií a stále probíhá další výzkum pomocí modernějších technik, jako například „Fuzzy logic“ nebo neuronové sítě. Tématem práce je polem orientované vektorové řízení, které je jedním z nejpoužívanějších způsobů řízení. Implementovali jsme schéma s polem orientovaným řízením v softwaru Simulink na indukční stroj se skutečnými parametry. Pro zkoumaný řadič jsme vyzkoušeli různé scénáře s cílem zjistit jeho fungovaní a možná vylepšení. Rovněž jsme implementovali bezsenzorové řízení stroje s odhadem otáček.Induction machines are one of the most widely used electric machines on many industrial and transportation applications. It is, therefore, important to have a facility to control these machines for the wide range of applications. On the other hand, it is possible to control DC machines with much simpler control schemes, but their technical drawbacks do not make them the preferable choice for the industry nowadays. Many control strategies have been developed for the speed and torque control of induction machines and more research is still ongoing using more modern techniques, such as “fuzzy logic” and “neural networks”. One of the most widely used control techniques is the “field-oriented control”, which is the topic of this thesis. With the parameters of a real induction machine, we implemented a control scheme based on the field-oriented control in the Simulink software. Various scenarios were applied to the controller in order to study its functioning and possible improvements. Furthermore, a speed estimation part was implemented for a sensorless control of the machine

El deterioro de la política educativa, científica y tecnológica destinada al ámbito rural

Como parte de la crisis capitalista que vive México, el abandono al sector educativo, científico y tecológico relacionado con el medio rural es alarmante. Más aún si se le compara con la participación de la educación en las actividades agropecuarias durante la década de los treinta y principios de los cuarenta en el siglo XX. Sin embargo, el sistema nacional de educación agrícola superior, surgió sin planeación y criterios definidos que integren la educación destinada al sector agropecuario con los intereses campesinos jornaleros, ejidatarios y comuneros del país

The international law gaze: Marshall Island v United Kingdom

The International Court of Justice recently bowed to nuclear weapons States and disappointed the rest of the international community. Forty-two years after the Court’s astonishing decision in declaring the dispute on nuclear tests between New Zealand and France terminated (Nuclear Test Case (New Zealand v. France), [1974] I.C.J. Rep. 458, at [54]), a new chapter on the reluctance of the Court to deal with nuclear weapons took place in its judgment of 5 October 2016 on Preliminary Objections in Obligations Concerning Negotiations Relating to Cessation of the Nuclear Arms Race and to Nuclear Disarmament (Marshall Islands v United Kingdom). There, the Court declared that it lacked jurisdiction, since there was no dispute between the parties. (Marshall Islands v UK, at [59])

Risk analysis not previously evaluated in the pre investment for road projects in Bogota City – Location Kennedy

Para las empresas que se dedican a la construcción de la infraestructura vial, es de vital importancia que cuenten con buenos procesos planificación, con el fin de no originar sobrecostos a proyectos que puedan generar una viabilidad económica como social. Por lo anterior, se hace necesario que se realicen análisis técnicos, económicos, sociales como la identificación de riesgos para cada uno de estos factores antes de la ejecución y puesta en marcha de cualquier proyecto. El propósito de este artículo es analizar los factores que no se tuvieron en cuenta en la etapa de planificación de un proyecto vial, ubicado en la localidad de Kennedy; donde después de haber iniciado con la construcción, se hizo necesario un cambio en las variables de diseño por la incorporación de nuevas rutas de transporte público. Estos cambios tuvieron como resultado unos sobrecostos en el presupuesto inicial, donde se dejaron de percibir significativos recursos económicos por parte del contratista. Estas pérdidas se generaron por falta de comunicación entre entidades, la no realización de un análisis de riesgo del proyecto en la zona de influencia como una mala planificación. Se analizaron cada una de las variables que sufrieron cambio en los diseños, con el fin de obtener una cuantificación y clasificación mediante el método Mosler; resaltando que a medida que los reprocesos se generen en etapas superiores a la pre inversión, mayores serán los costos de mejora y menores serán las ganancias recibidas.For the companies engaged in the construction of road infrastructure, is of vital importance that has good planning processes, in order to not cause cost overruns for projects that can generate economic viability and social. Therefore, it is necessary to technical, economic, social analysis, such as the identification of risks for each of these factors occur before execution and start-up of any project. The purpose of this article is to analyze the factors that were not taken into account at the planning stage of a road project, located Kennedy Town; where after the initiation of the construction, is necessitated a change in the variables of design by the incorporation of new public transportation routes. These changes resulted in some cost overruns in the initial budget, where they let themselves perceive significant economic resources by the contractor. These losses were generated by lack of communication between entities, not conducting a risk analysis of the project in the area of influence as a poor planning. Analysed each of the variables that underwent change in the designs, in order to obtain a quantification and classification using the Mosler method; highlighting that to the reprocesses generated as superior to the pre investment stages, the greater the costs of improvement and less will be received earnings

TropeTwist: Trope-based Narrative Structure Generation

Games are complex, multi-faceted systems that share common elements and underlying narratives, such as the conflict between a hero and a big bad enemy or pursuing some goal that requires overcoming challenges. However, identifying and describing these elements together is non-trivial as they might differ in certain properties and how players might encounter the narratives. Likewise, generating narratives also pose difficulties when encoding, interpreting, analyzing, and evaluating them. To address this, we present TropeTwist, a trope-based system that can describe narrative structures in games in a more abstract and generic level, allowing the definition of games' narrative structures and their generation using interconnected tropes, called narrative graphs. To demonstrate the system, we represent the narrative structure of three different games. We use MAP-Elites to generate and evaluate novel quality-diverse narrative graphs encoded as graph grammars, using these three hand-made narrative structures as targets. Both hand-made and generated narrative graphs are evaluated based on their coherence and interestingness, which are improved through evolution.Comment: submitted, 9 page

Casa GGG and Casa Negro

Casa GGG The house could be seen as the most simple and yet the most complex and exciting architectural theme. I understand it as a passage that transports inhabitants from every day life of the street to an inner world of intimacy

Cooperation or Coordination of Underwater Glider Networks? An Assessment from Observing System Simulation Experiments in the Ligurian Sea

Abstract The coordinated and cooperative-unaware networking of glider fleets have been proposed to obtain a performance gain in ocean sampling over naïve collective behavior. Whether one of these implementations results in a more efficient sampling of the ocean variability remains an open question. This article aims at a performance evaluation of cooperative-unaware and coordinated networks of gliders to reduce the uncertainty in operational temperature model predictions. The evaluation is based on an observing system simulation experiment (OSSE) implemented in the northern Ligurian Sea (western Mediterranean) from 21 August to 1 September 2010. The OSSE confronts the forecast skills obtained by the Regional Ocean Modeling System (ROMS) when assimilating data gathered from a cooperative and unaware network of three gliders with the prediction skill obtained when data comes from a coordinated configuration. An asynchronous formulation of the ensemble Kalman filter with a 48-h window is used to assimilate simulated temperature observations. Optimum sampling strategies of the glider networks, based on a pattern search optimization algorithm, are computed for each 48-h forecasting period using a covariance integrated in time and in the vertical direction to reduce the dimensionality of the problem and to enable a rapid resolution. Perturbations of the depth-averaged current field in glider motions are neglected. Results indicate a better performance of the coordinated network configuration due to an enhanced capacity to capture an eddy structure that is responsible for the largest forecast error in the experimental domain