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M. Pushpavalli ¹, P. Abirami ¹, K. Vasanth ¹

Affiliations
1 EEE Department, Sathyabama University, Chennai, Tamil Nadu, IN

Abstract

This paper proposes a novel closed loop control of Negative output KY boost converter using fuzzy logic. The power circuit consists of a capacitor and a diode in addition to the conventional boost converter circuit. The controller implemented the fuzzy logic to fuzzify the change in voltage with the reference voltage in order to obtain reduced output ripple, improved efficiency and fast settling time. The Proposed controller exhibits better performance than its closed loop counterparts such as PI and PID controllers. The simulation result illustrates that the output voltage ripple is reduced from 103mV to 3 mV and also the settling time is improved from 30ms to 15ms .It enhances the output power from 36 watts to 59.21 watts in load variations and 474 watts to 987 watts in line variations phenomenon. The Hardware development was also developed for the same and the performance was observed.

Keywords

Fuzzy Logic Controller, Negative KY Boost Converter, PID Controller

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P. Abirami ¹, Jayamohan Raj ¹

Affiliations
1 SRM College of Nursing, SRM University, Chennai, Tamilnadu, IN

Abstract

Pregnancy induces progressive changes in maternal carbohydrate metabolism. As pregnancy advances insulin resistance and diabetogenic stress due to placental hormones necessitate compensatory increase in insulin secretion. When this compensation is inadequate,GestationalDiabetes develops.'GestationalDiabetesMellitus' [GDM] is defined as carbohydrate intolerance with onset or recognitionFirstduring pregnancy.To treat Gestational Diabetes Mellitus naturally the Antenatal Mother with GestationalDiabetesMellitus should practice Yogis positions (SUKSHMA VYAYAMAS) along with Pranayama (breathing exercises) & Meditation Toevaluate the effect of Yoga on Blood glucose level among mother with Gestational Diabetes Mellitus. This was a prospective interventionalstudy and it was conducted at Government Hospital, Tambaram. 212Antenatal mothers with Gestational Diabetes Mellitus were randomized into yoga and control groups. Sample size was detected based on Power analysis and selection of the samples based on Non-probability purposive sampling technique. Quasi Experimental -Time Series Design was adopted.. The yoga group (n = 104) received standard care plus Intensive, continuous Yoga practice daily for (30-40 minutes/day) from 24th week to 36th week for 12 Weeks from the trained yoga instructor.. The control group (n = 108) received standard care from the Hospital. Fasting and post prandial Blood Glucose level was Continuously monitored every 4th week before Yoga at 24th week after Yoga from 28thweek to 36 th week.. Among Yoga group, 24th week Fasting blood glucose mean score was 122.99 mg/dl after intensive practice of Yoga the mean score at 28th week 106.31mg/dl, 32nd 102.37mg/dl and 36th week 90.27mg/dl and the Post prandial Blood Glucose mean score at 24th week 160.45mg/dl and after yoga the mean score at 28th week 140.14mg/dl, 32nd 127.01mg/dl and in 36th week 117.13mg/dl . So this reduction was statistically significance. It was assessed using Repeated measures analysis of variance F test (Fasting=25.70,P=0.001***, Postprandial=34.97,P=0.001***) .Between weeks like 24th week and 28th week,32 week,36 week differences was calculated using bonferroni t-test. There is a Significant reduction in the Fasting and Postprandial blood glucose level in Yoga Group than control group at p< 0.001 level of significance. This study critically analyzed and it is proven that yoga reduces blood glucose level which prevents adverse outcomes of Gestational Diabetes Mellitus.

Keywords

Gestational Diabetes Mellitus, Sukshmavyayamas, Yoga, Pranayama, Meditation.

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E. Annie Elisabeth Jebaseeli ¹, D. Susitra ¹, P. Abirami ¹

Affiliations
1 Faculty of Electrical and Electronics Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN

Abstract

Wind generation is one of the renewable energy power sources that constitute a remedy for greenhouse gas emission treatments. Conventionally various types of wind energy generators such as Induction Generators or Synchronous Generators have been used as wind Generators. The shortcomings of these conventionally used Generators like complex in structure and limited rotor converter rating have turned research attention to more simple and robust variable speed Generator topologies such as Switched Reluctance Generator (SRG). Investigations have proved that this technology is promising due to the new recent advances in the field of variable speed drives. In this research paper, the operation of split DC Power converter required for SRG with even number of phases is discussed along with the operation modes. Then the converter circuit is simulated and the results are presented to gain knowledge about the characteristics of this converter.

Keywords

Converter, Renewable Sources of Energy, Switched Reluctance Generator, Wind Energy Conversion Systems

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B. Sajitha ¹, P. Abirami ¹, P. Akila ¹, P. Sowmiya ¹

Affiliations
1 PG and Research, Department of Botany, Vellalar College for Women (Autonomous), Erode – 638012, Tamil Nadu, IN

Abstract

A qualitative study to evaluate the phytochemical constituents in aqueous and methanol leaf extracts of Elytraria acaulis was done by following standard qualitative phytochemical screening methods. The prelimininary phytochemical analysis of Elytraria acaulis leaves showed the presence of carbohydrates, protein, alkaloids, tannins, glycosides, terpenoids, phenols, flavanoids, steroids and saponins in both the extracts compared to aqueous extract where saponins, steroids, alkaloids and carbohydrates were absent. The leaves of Elytraria acaulis might ensure phyto constituents source with stable, biologically active components that can establish a scientific base for synthesis modern medicine in future.

Keywords

Acanthaceae, Elytraria acaulis, Flavanoids, Phytochemical Screening, Saponin and Anti Inflamatory, Tannins.

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