Thai Pongal in the life of the Vellalars of Karimangalam Area

In the early days when the Tamil people lived in groups, they followed certain guidelines for the betterment of their lives. Its expression can still be seen today in the works of Sangam literature. It would not be an exaggeration to say that this is the way our forefathers followed then to understand the Tamil people as civilized people today. Thus, the Velala Gounder living in the Karimangalam area of ​​the Dharmapuri district, a Tamil tribe, are still celebrating Pongal. A few days before the commencement of the festival in the Karimangalam area, all the people of Urgudi unanimously decided to collect firewood for Pongal, to boil the door, to roll the clay, to set the stove, to provide the other community with the customs of Thaipongal, and to preserve the Pongal on the day of Poki. Feasting, sharing of food with others, worshiping with cow dung, embracing the dead, bringing a plant from the river to worship the dead, and worshiping the cow, which helps to improve their lives. Making people feel the pain of bullfighting and making people feel the pain of bullfighting and celebrating the festival at the beginning of the festival are just as important as the honor of sharing a bouquet so that no one can return home empty-handed after the festival

Experimental and finite element approach for finding sound absorption coefficient of bio-based foam

The enormous consumption of Polyurethane foam leads to severe environmental pollution and health hazards, so it is necessary to overcome this problem. This paper presents alternative and less hazardous foam that differs from traditional foams. A bio-based foam was developed either by using castor oil-based polyol or natural fibers as fillers. In the present study, rigid foam is synthesized by both castor polyol and luffa fiber, whereas for flexible foam, only luffa fiber is incorporated. Luffa fillers enhance the porosity of Polyurethane foam, which is the dominating factor influencing the value of the sound absorption coefficient. Both rigid and flexible foams were developed with 5, 10 and 15 percentages of filler loaded. The samples are tested experimentally using the two-microphone impedance tube method and the measured result was compared with the numerical result, which is predicted from COMSOL Multiphysics. The experimental results of flexible foam demonstrate good agreement with numerical results. The results indicate that the addition of Luffa fibers enhances the sound absorption performance of flexible foam and deterioration in the rigid foam because of the high viscosity of castor oil polyol

Scotland, Catalonia and the “right” to self-determination: a comment suggested by Kathryn Crameri’s “Do Catalans Have the Right to Decide?

No abstract available

General Information About the Design of Smart Grids in Universities

Until recently, the dominant paradigm in the electrification consisted of universal service and its centralization, and for loor modern times think of the power grid of the future where a qualitative and radical leap is required because of the need to manage better energy resources, promote environmental protection and meet the increasingly demanding requirements of quality of service. A power distribution network becomes intelligent acquiring data, communicating, processing information and exercising control through a feedback that allows you to adjust to changes that may arise in actual operation. Ecuador aimed at energy efficiency through smart grids, which allow the dealer to maintain absolute monitoring of energy flow and the elements of the power grid. Thus, it is possible that service companies can efficiently manage their assets and the end user to manage consumption rationally, requiring to enhance the energy efficiency of power grids, one management timely and efficient energy

Photovoltaic Energy to Face an Earthquake

The application of photovoltaic technology is necessary to reduce the harmful effects of an intense earthquake in the city of Portoviejo. It is based on the information obtained about the occurrence of the earthquake on April 16 and considering data from other events of the same nature occurred in the territory, an assessment of the seismic risk for the city and by characterization of one of the zones is made subject to danger, the introduction of photovoltaic luminaires is proposed in order to provide certain strengths that can facilitate the work of the first urgency in the rescue and urgent repair of breakdowns, as well as the evacuation of the population to safer areas especially at night. An analysis is made of the technological structure of photovoltaic luminaires and the prices they have in the market, both internally and Internationally

Roadmap for the Introduction of Smart Grids in Ecuador

Distributed generation and smart grids are the reality of an efficient electricity grid, at work an analysis of the advantages that distinguish both concepts related to the scenario generation, transportation, distribution and supply of energy is provided. Some results achieved in the related study of the solar potential and wind energy, focused on the use of these resources will improve in quality future university exposed electrical service. The main elements that have been considered to be incorporated in the roadmap for the introduction of smart grids in Ecuador expose

Analysis of Stationary- and Synchronous-Reference Frames for Three-Phase Three-Wire Grid-Connected Converter AC Current Regulators

The current state of the art shows that unbalance and distortion on the voltage waveforms at the terminals of a grid-connected inverter disturb its output currents. This paper compares AC linear current regulators for three-phase three-wire voltage source converters with three different reference frames, namely: (1) natural (abc), (2) orthogonal stationary (αβ), and (3) orthogonal synchronous (dq). The quantitative comparison analysis is based on mathematical models of grid disturbances using the impedance-based analysis, the computational effort assessment, as well as the steady-state and transient performance evaluation based on experimental results. The control scheme devised in the dq-frame has the highest computational effort and inferior performance under negative-sequence voltage disturbances, whereas it shows superior performance under positive-sequence voltages among the reference frames evaluated. In contrast, the stationary natural frame abc has the lowest computational effort due to its straightforward implementation, with similar results in terms of steady-state and transient behavior. The αβ-frame is an intermediate solution in terms of computational cost.This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).fi=vertaisarvioitu|en=peerReviewed

Book reviews

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44309/1/10597_2006_Article_BF02349243.pd

Anteproyecto Arquitectónico Turístico, Segunda Etapa del “Parque Temático de Orquídeas”, La Suana, San Ramón, Matagalpa.

Se realiza un anteproyecto arquitectónico turístico, segunda etapa del “parque temático de orquídeas”, La Suana, San Ramón, Matagalpa, en el cual consiste en el mejoramiento ecológico y preservación del parque temático de orquídeas y tiene como finalidad preservar los recursos naturales asegurando el equilibrio y la continuidad de los procesos evolutivos y ecológicos, así como de asegurar el aprovechamiento sustentable de la biodiversidad del territorio en cuestión

The Future of Micro-grids in Ecuador

An analysis is made on the development of power lines worldwide and that offer the approaches of the impacts that are generated in the economic and environmental, which justify the application of smart grids in Ecuador, as an effective way to raise the efficiency of the electric power service and to achieve a more efficient use of the energy that is generated by showing the different technologies used in electricity generation where renewable energy sources are incorporated. A comparative analysis of how the installed generation power has been increasing until 2016 is shown