Transformer’s internal short circuit fault detection by using transmission line model
In this study, a new approach is proposed for modeling power transformers internal faults by using transmission line model (TLM) and also presented a method to forecasting these kinds of faults by monitoring the effect of partial discharges on transformer primary side current. These monitoring actions boost the reliability of power system. Simulating and detecting loop to loop and loop to ground faults between the desired Transformer’s coil wires in early stages is advantage of this method. Finally, Transformers TLM is implemented with Matlab for observing this method. Simulation results verified application of proposed modeling technique for studying and detecting power transformers different short-circuit faults conditions.
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Urysohn Lemma and Tietze Extension Theorem in Fuzzy soft topological space
In this paper fuzzy soft mapping, fuzzy soft continuity on family of soft sets are introduced. Equivalent conditions related these concepts are proved. The famous Urysohn lemma and Tietze Extension theorem are established in fuzzy soft setting.
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Wood Anatomy of Mistletoe-Infected Wood of Tectona grandis Linn. F
Anatomical features of infected wood of teak (Tectona grandis) were investigated in this study. Mistletoe-infected trees were sectioned and examined under a light microscope in order to ascertain the extent of infestation of the parasite, especially the haustoria, on the wood species. Wood micrographs of healthy Tectona grandis were presented, while photomicrographs of the infested wood sections revealed patches of deposits which were noticeable at the tangential section in the parenchyma cells. Upon examination and in comparison to sections from healthy Tectona grandis, it was observed that the deposits might have been as a result of the wood response to the infestation of the parasite (mistletoe). The materials which seemed to plug part of the rays were associated to the parasite activities in the wood rays, as the areas mostly infected were the parenchyma cells where food materials are normally stored in wood. The study revealed that impact of Mistletoes goes beyond the peripheral of the bark region but further into the host wood microstructures.
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“Turnover lead to more turnover” The effect of organization culture and job climate on employee retention in Pakistan
This study investigated the employee retention dependency on predictor variables like training program, incentive programme, co-worker social support, working hours and union representation. For this purpose data have collected from individuals in four banks and government employee who are living in government colonies in Pakistan. Total population was approximately 550 and sample size 226 has been used for collecting data. The regression test is used to check dependency of employee retention on predictor variables. the result of the study indicate that employee retention depend more on incentive program, union representation, co-worker social support, and less on working hours and supervisory program. However incentive program is more significant predictor variable for employee retention than other variable.
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A review on the Cohesive Zone Models for crack propagation analysis
The cohesive zone model (CZM) can be regarded as a computational model which provides valuable insights in the prediction of crack initiation and propagation. The concept behind this model considers the process of fracture as a gradual phenomenon in which separation takes place between two adjacent virtual surfaces across an extended crack tip. The role of the CZM in analyzing the crack propagation in different materials and variations in the traction separation law(TSL) are covered in a detailed manner in this paper.
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A study on brand preference for two-wheelers by women in Salem
The purpose of the study is to test empirical and conceptualization of women consumer assessment of brand image, brand attitude and quality of a two-wheeler, which is considered as a durable product. The researcher’s interest to know the degree to which women’s preference varies with age, education, occupation, or other characteristics. The data is collected from the 149 women who uses two wheeler in Salem District. In the study the researcher have tried to measure the expectation and satisfaction of the women consumers towards two wheelers. The results derived from the study indicate that the factor that induces the consumers to buy a particular vehicle on account of special features like easy start, gearless, auto gear etc.
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Adsorption of safranin onto chemically modified rice husk in a upward flow packed bed reactor: artificial neural network modeling
The study reports the adsorption of safranin onto NaOH-modified rice husk in a upward packed bed column. Effects of the operating parameter such as flow rate, influent dye concentration were studied. To determine the characteristic parameters of the column, four models- Thomas, Adams–Bohart, BDST, and Yoon–Nelson models were applied to the experimental data. The results showed that Thomas model best fitted with the experimental data at various flow rates, while Yoon-Nelson model was suitable with data at various safranin concentrations. Moreover, it was observed that on increasing the concentration of safranin, adsorption capacity increased which in turn decreased on increasing the flow rate. Least sum of square (SS) and ?2 error analysis were applied to the models to find out the best fit model with the experimental data. An artificial neural network (ANN) model was developed to predict the decolorization of the dye solution in upward packed bed column. The model provided reasonable predictive performance (R2 = 0.988).
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An evaluation of the effectiveness of guidance and counselling services in public universities in Kenya
Concerns have been raised over the increase of problems like drug abuse, alcoholism premarital sex, cheating in examinations and teenage pregnancies in Kenyan Public Universities. The study sought to evaluate the effectiveness of guidance and counselling services at Masinde Muliro University of Science and Technology. The Goal Setting Theory by Locke and Latham (1990) formed the theoretical framework for the study. The Study adopted a descriptive survey design. The sample size comprised of 204 university students. It was found out that guidance and counselling services at Masinde MuliroUniversity of Science and Technology were effective among students who sought the services. The study, however recommended that the guidance and counselling department should focus more on social, health and financial issues affecting students in the campus as well as exploring the influence of university enrolment and home oriented factors that may affect students and the stakeholders were encouraged to be involved in the process of guiding and counselling students.
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Analysis of three phase inverter based welding machine using PIC
Three phase inverter based welding machine employ resonant high frequency IGBT inverter technology. Due to soft switching scheme, these machines are very rugged and efficient. Currently 3-Phase 160A, 3-Phase 200A, All the TIG machines have built in high frequency igniter circuit for non - contact arc initiation. All these welding machines have Special feature to shut down the internal electronic circuit when machine is kept idle, This feature enhances the life time of machines. Due to such features, Single phase welding machine is having light and saves the electricity up to 60%. Having used for current 20 to 200 A. This machine is moisture free dc welding. The input characteristics are similar to AC, having features such as high max output voltage, stable against voltage fluctuations. Inner loop control for quick system respondence, Peak current control mode make the power devices and stable, against frequent short circuit shocks, Arc thrust function, improve the metal transfer Hot arc ignition function small light and energy saving.
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Antioxidant activity of Barbula javanica Doz. et Molk.: A relatively unexplored bryophyte
In the present study antioxidant potential of the moss Barbula javanica Doz. et Molk was evaluated. The total phenolic content (TPC) was found to be 30mg±0.96 GAE/gdw. The radical scavenging activity as IC50 against DPPH (2, 2-diphenyl-1-picrylhydrazyl), NOSA (Nitric oxide scavenging assay) and DDA (deoxyribose degradation assay) was evaluated to be 100±1.12, 80±0.90 and 35±0.50 ?g/ml, respectively. The reducing activity was assayed using FRAP (Ferric Reduction Antioxidant Potential) was found to be 1259±1.56 ?M/l. The results show the potential of B. javanica as novel antioxidant, which has been reported for the first time.
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