Phases Dynamic Balancer

Most of the current domestic installations are single phase, with contracted power equal to or less than 15 kW and with a potential difference of 230 V. When consumption is expected to be higher you choose to use three different alternating currents with a difference voltage of 400 V between them, which are called phases. This enables the subdivision of the installation in different single-phase circuits, fed independently with the neutral installation. These couples have, in turn, a difference in voltage of 230 V. The neutral is common for all three phases so that, if the system is balanced, no current flows through it. The problem with these installations is that they are designed to work in an offset manner, using phase loads, and simultaneously an equal amount of energy consumed by the three phases of the network. Connection to each of the phases makes independent single-phase loads or disturbance of the operation of the original phase circuit and, consequently, the corresponding increases in consumption, heating of engines, etc.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Optimization of Energy Distribution in Solar Panel Array Configurations by Graph Theory and Minkowski’s Paths

Nowadays, the development of the photovoltaic (PV) technology is consolidated as a source of renewable energy. The research in the topic of maximum improvement on the energy efficiency of the PV plants is today a major challenge. The main requirement for this purpose is to know the performance of each of the PV modules that integrate the PV field in real time. In this respect, a PLC communications based Smart Monitoring and Communications Module, which is able to monitor at PV level their operating parameters, has been developed at the University of Malaga. With this device you can check if any of the panels is suffering any type of overriding performance, due to a malfunction or partial shadowing of its surface. Since these fluctuations in electricity production from a single panel affect the overall sum of all panels that conform a string, it is necessary to isolate the problem and modify the routes of energy through alternative paths in case of PV panels array configuration.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Análisis de Eficiencia Energética en instalaciones de Alumbrado Público. Indicador PM2

En la presente Tesis Doctoral comenzaremos por analizar el estado actual e histórico del alumbrado público, lo que nos permitirá comprobar como con el paso del tiempo los problemas que se les plantean a los ayuntamientos (responsables principales de estas instalaciones) no han cambiado, y como una de las posibles soluciones es externalizar la gestión de estas instalaciones. A partir de esta introducción histórica fijaremos el objetivo de la Tesis Doctoral que consistirá en proponer un indicador

Optical Sensing of Structural Dynamics in Complex Media

Quantifying the structural dynamics of complex media is challenging because of the multiple temporal and spatial scales involved. Thanks to the ability to retrieve collective dynamics noninvasively, light scattering-based approaches are often the methods of choice. This dissertation discusses specific features of dynamic light scattering that utilizes spatio-temporal coherence gating. It is demonstrated that this optical fiber-based approach can operate over a large range of optical regimes and it has a number of unique capabilities such as an effective isolation of single scattering, a large sensitivity, and a high collection efficiency. Moreover, the approach also provides means for proper ensemble averaging, which is necessary when characterizing multi-scale dynamics. A number of applications are reviewed in which these specific characteristics permit recovering dynamic information of complex fluids beyond the capabilities of traditional light scattering-based techniques

Análisis de los indicadores de alumbrado actuales

Comunicación presentada en XXXIX Simposium Nacional de alumbrado. Ciudad de Mataró, del 22 al 25 de3 mayo de 201

Passive optical mapping of structural evolution in complex fluids

Self-assembling complex systems exhibit properties that involve a broad spectrum of thermal, structural, morphological, and optical transitions. Various techniques have been used to assess different aspects of the phase transitions in these complex systems. However, because of inherent technical constraints, structural information is usually provided only within narrow ranges of concentrations and temperatures. We show here that by effectively suppressing multiple scattering, low-coherence dynamic light scattering permits assessing the aggregation dynamics of self-assembling systems in a completely passive manner and over ranges of concentration and temperatures well beyond the limits of traditional approaches. The power spectral analysis of scattered intensity fluctuations permits a reliable characterization of multiple relaxation times. We demonstrate that the entire phase diagram can be covered in a consistent way and structural phase transitions can be mapped over a broad optical regime from weak to strong scattering

Airborne particulate matter PM2.5 from Mexico City affects the generation of reactive oxygen species by blood neutrophils from asthmatics: an in vitro approach

<p>Abstract</p> <p>Background</p> <p>The Mexico City Metropolitan Area is densely populated, and toxic air pollutants are generated and concentrated at a higher rate because of its geographic characteristics. It is well known that exposure to particulate matter, especially to fine and ultra-fine particles, enhances the risk of cardio-respiratory diseases, especially in populations susceptible to oxidative stress. The aim of this study was to evaluate the effect of fine particles on the respiratory burst of circulating neutrophils from asthmatic patients living in Mexico City.</p> <p>Methods</p> <p>In total, 6 subjects diagnosed with mild asthma and 11 healthy volunteers were asked to participate. Neutrophils were isolated from peripheral venous blood and incubated with fine particles, and the generation of reactive oxygen species was recorded by chemiluminescence. We also measured plasma lipoperoxidation susceptibility and plasma myeloperoxidase and paraoxonase activities by spectrophotometry.</p> <p>Results</p> <p>Asthmatic patients showed significantly lower plasma paraoxonase activity, higher susceptibility to plasma lipoperoxidation and an increase in myeloperoxidase activity that differed significantly from the control group. In the presence of fine particles, neutrophils from asthmatic patients showed an increased tendency to generate reactive oxygen species after stimulation with fine particles (PM_2.5).</p> <p>Conclusion</p> <p>These findings suggest that asthmatic patients have higher oxidation of plasmatic lipids due to reduced antioxidant defense. Furthermore, fine particles tended to increase the respiratory burst of blood human neutrophils from the asthmatic group.</p> <p>On the whole, increased myeloperoxidase activity and susceptibility to lipoperoxidation with a concomitant decrease in paraoxonase activity in asthmatic patients could favor lung infection and hence disrupt the control of asthmatic crises.</p

Design and deployment of a smart system for data gathering in aquaculture tanks using wireless sensor networks

[EN] The design of monitoring systems for marine areas has increased in the last years. One of the many advantages of wireless sensor networks is the quick process in data acquisition. The information from sensors can be processed, stored, and transmitted using protocols efficiently designed to energy saving and establishing the fastest routes. The processing and storing of data can be very useful for taking intelligent decisions for improving the water quality. The monitoring of water exchange in aquaculture tanks is very important to monitor the fish welfare. Thus, this paper presents the design, deployment, and test of a smart data gathering system for monitoring several parameters in aquaculture tanks using a wireless sensor network. The system based on a server is able to request and collect data from several nodes and store them in a database. This information can be postprocessed to take efficient decisions. The paper also presents the design of a conductivity sensor and a level sensor. These sensors are installed in several aquaculture tanks. The system was implemented using Flyport modules. Finally, the data gathering system was tested in terms of consumed bandwidth and the delay Transmission Control Protocol (TCP) packets delivering data from the sensors.This work has been partially supported by the Postdoctoral Scholarship “Contratos Postdoctorales UPV 2014 (PAID‐ 10‐14)” of the “Universitat Politècnica de València,” by the “Programa para la Formación de Personal Investigador— (FPI‐2015‐S2‐884)” of the “Universitat Politècnica de València,” and by the pre‐doctoral student grant “Ayudas para contratos predoctorales de Formación del Profesorado Universitario FPU (Convocatoria 2014)” Reference: FPU14/ 02953 by the “Ministerio de Educación, Cultura y Deporte,” by Instituto de Telecomunicações, Next Generation Networks and Applications Group (NetGNA), and Covilhã Delegation, by the National Funding from the FCT—Fundação para a Ciência e a Tecnologia through the UID/EEA/500008/2013 Project, by the Government of Russian Federation, Grant 074‐U01, and by Finep, with resources from Funttel, Grant No. 01.14.0231.00, under the Radiocommunication Reference Center (Centro de Referência em Radiocomunicações —CRR) project of the National Institute of Telecommunications (Instituto Nacional de Telecomunicações—Inatel), Brazil.Parra-Boronat, L.; Sendra, S.; Lloret, J.; Rodrigues, JJPC. (2017). Design and deployment of a smart system for data gathering in aquaculture tanks using wireless sensor networks. International Journal of Communication Systems. 30(16):1-15. https://doi.org/10.1002/dac.3335S115301

Modelo estratégico integral para los procesos de selección de FECEDA (Fondo de Empleados Oficiales del Departamento del Meta)

Las ilustraciones representan cada una de las preguntas y respuestas realizadas a los gerentes de la organización.El Fondo de Empleados Oficiales del Departamento del Meta - FECEDA, es una organización que presenta un crecimiento sostenido y gran solidez patrimonial, con una trayectoria de más de 30 años brindando servicios para el mejoramiento de la calidad de vida y el bienestar integral de todos sus asociados. Con el transcurrir de los años FECEDA implementa decisiones y acciones para su desarrollo, hoy en día es el fondo de empleados más representativo en el departamento del Meta, cuenta con más de 3.500 asociados, genera 36 puestos de trabajos directos además de un número indeterminado de empleos indirectos Para realizar la selección de acuerdo a lo que las organizaciones esperan, muchas veces debemos detectar las expectativas implícitas que éstas tienen. Para ello hay que tener en cuenta el tipo de empresa, su cultura, el mercado, el discurso con el cual se maneja, el clima organizacional, las relaciones formales (organigrama), la descripción de tareas del puesto. Para esto es necesario realizar una entrevista con el gerente o responsable. Por lo tanto, es importante acordar una entrevista con el/la responsable de recursos humanos y de ser necesario con quienes puedan aportar datos que ayuden a elaborar el perfil requerido.The Official Employees Fund of the Meta Department - FECEDA, is an organization that presents a sustained growth and great patrimonial solidity, with a trajectory of more than 30 years providing services for the improvement of the quality of life and the integral well-being of all its associates. Over the years, FECEDA implements decisions and actions for its development, today it is the most representative employee fund in the Meta department, it has more than 3,500 associates, it generates 36 direct jobs in addition to an undetermined number of indirect jobs To make the selection according to what organizations expect, many times we must detect the implicit expectations that they have. To do this, the type of company, its culture, the market, the discourse with which it is handled, the organizational climate, the formal relationships (organization chart), the job description of the position must be taken into account. This requires an interview with the manager or person in charge. Therefore, it is important to arrange an interview with the person responsible for human resources and, if necessary, with those who can provide data to help develop the required profile