Effect of Wind Farm and Thyristor Switched Series Capacitors on a Faulty Network

Controlling voltage and active or reactive losses are one of the most important issues in each power grid. In this paper, the influence of wind farm and thyristors switched capacitors on the network are considered. TSSC and Wind turbines are one of the significant components of each network. These instruments are also one of the resources of producing active and reactive power. In this study, wind farm and TSSC are already located optimally by Genetic algorithm. This network studied when a fault considered in one of buses. So that, in first step none of wind farm and TSSC are in the power grid. In the second step, both wind farm and TSSC are connected while a short circuit accrues in one of the busses or lines of the network.  At the end, it will be observed that using thyristor switched capacitors and wind farm influence the network. So that, the capacity of producing the reactive and active power will be increased and totally the loss of the system will be decreased. Furthermore, the voltage profile will be in a suitable range

Determinación de la mejor combinación de abono orgánico, suelo y riego en la mejora del crecimiento (cm) de la alfalfa (Medicago Sativa l.) en la Provincia de Melgar - 2017

TesisEl presente trabajo de investigación DETERMINACIÓN DE LA MEJOR COMBINACIÓN DE ABONO ORGÁNICO, SUELO Y RIEGO EN LA MEJORA DEL CRECIMIENTO (CM) DE LA ALFALFA (Medicago Sativa L.), se realizó en el fundo Ankara del distrito de Umachiri en la Provincia de Melgar del departamento de Puno. Se encuentra a una altitud de 3921 m.s.n.m., la investigación tuvo como objetivo determinar la mejor combinación de abonos orgánicos, tipos de suelo y riego para mejorar el crecimiento de altura (cm) para productividad de alfalfa en la Provincia de Melgar, esto ha sido motivado, principalmente, por la necesidad de contar con un recurso forrajero perenne, de alta calidad y de uso estival para lograr una mayor producción de leche, carne, lana y fibra, de esta manera obtendremos mejores ingresos económicos y generar una rentabilidad positiva para los productores. Para lo cual se aplicó el diseño estadístico de Bloque Completamente al Azar y un bloque con 3 niveles y tratamientos con 2 factores cada una de 3 niveles. Luego se validó el experimento usando el software SAS, STATGRAPHICS, en el cual se realizó un análisis de varianza (ANOVA) una vez procesado los datos concluimos que existe diferencia estadística significativa entre tipos de abonos, sistemas de riegos, tipo de suelo, para el crecimiento de altura (cm) de la alfalfa, el mejor tratamiento es el suelo humífero con el abono de biol y el sistema de riego por aspersión, con el que mejoró la altura de crecimiento en un 75.97cm. En cuanto a la fenología del cultivo los resultados obtenidos e interpretados son de la siembra del 1 de noviembre del 2016 hasta el 30 de abril del 2017

Improving Sensitivity of Direct Microscopy for Detection of Acid-Fast Bacilli in Sputum: Use of Chitin in Mucus Digestion

In order to try to improve the results of direct smear microscopy, we used the mucus-digesting quality of chitin in tuberculosis (TB) laboratories. For this purpose, a total of 430 sputum specimens were processed by the N-acetyl-l-cysteine concentration, sodium hypochlorite (NaOCl) liquefaction, chitin sedimentation, and direct microscopy methods. Then, the smear sensitivity for acid-fast bacillus detection by chitin-treated sputum was compared with the sensitivity of smears prepared by other methods. Our results showed that the chitin solution took less time to completely homogenize the mucoid sputum than did the N-acetyl-l-cysteine and NaOCl methods. The N-acetyl-l-cysteine concentration method demonstrated sensitivity and specificity levels of 83 and 97%, respectively. In comparison, the sensitivity of chitin sedimentation was 80%, with a specificity of 96.7%. The NaOCl liquefaction method showed a sensitivity of 78%, with a specificity of 96%. Finally, the sensitivity of direct microscopy was lower than those of the other tested methods and was only 46%, with a specificity of 90%. The chitin and NaOCl liquefaction methods are both easy to perform, and they do not require additional equipment (centrifuges). Also, our results demonstrated that the chitin method is less time-consuming than the NaOCl method, since only 30 min of incubation is required to bring complete sedimentation of bacilli in chitin-treated sputum whereas the NaOCl method needs 10 to 12 h to give the same results in the same sputum specimens. Therefore, the chitin liquefaction and sedimentation method may provide better results in TB laboratories of developing countries than the N-acetyl-l-cysteine concentration, NaOCl overnight sedimentation, and direct smear microscopy methods