PV Systems based High Gain Converter using CI and SCC Techniques

In this paper, new techniques of a CI and SCC-based step-up higher-level voltage DC_DC converter were implemented. The CI and SC charging and discharging the energy respectively to attain higher gain. The stress in switching volt level and inductance leakage is detached using the clamp circuitry. The reversed retrieval problem in the diode was eradicated with the help of Coupled Inductor (CI). The new topology to get more gain of the voltage and improved efficiency. The steady state analysis with the operation procedures of novel DC_DC converter is discussed here. In proposed model, input voltage is 24V & Vo is 410V, Pmax is 150W was given to get ηmaximum of 96.4%

Zonal Velocity Bands and the Solar Activity Cycle

We compare the zonal flow pattern in subsurface layers of the Sun with the distribution of surface magnetic features like sunspots and polar faculae. We demonstrate that in the activity belt, the butterfly pattern of sunspots coincides with the fast stream of zonal flows, although part of the sunspot distribution does spill over to the slow stream. At high latitudes, the polar faculae and zonal flow bands have similar distributions in the spatial and temporal domains.Comment: To appear in Solar Physic

Comparative study of anaphylaxis incidence in patients receiving anti-snake venom with or without prophylactic adrenaline: a prospective, randomized, blinded study

Background: Anti-snake venom serum (ASV) administered for snake-bite patients is the most specific treatment available. Unfortunately, it can cause severe anaphylaxis which can be fatal sometimes.Methods: Fifty patients were included in the study and randomly divided into group A, who received sub-cutaneous adrenaline before administration of anti-venom serum and group B who did not. Each group comprised of twenty-five patients. The incidences as well as the severity of anaphylaxis in both groups and also the effects of subcutaneous adrenaline on the hemodynamic were analysed.Results: Anaphylactic reactions were significantly less in group A than group B population (p0.05) implying that administration of sub-cutaneous adrenaline is safe.Conclusions: Prophylactic subcutaneous adrenaline before anti snake venom administration is highly efficacious and safe in reducing the incidence as well as severity of anaphylactic reactions

Enabling Future Sustainability Transitions: An Urban Metabolism Approach to Los Angeles Pincetl et al. Enabling Future Sustainability Transitions

Summary: This synthesis article presents an overview of an urban metabolism (UM) approach using mixed methods and multiple sources of data for Los Angeles, California. We examine electric energy use in buildings and greenhouse gas emissions from electricity, and calculate embedded infrastructure life cycle effects, water use and solid waste streams in an attempt to better understand the urban flows and sinks in the Los Angeles region (city and county). This quantification is being conducted to help policy-makers better target energy conservation and efficiency programs, pinpoint best locations for distributed solar generation, and support the development of policies for greater environmental sustainability. It provides a framework to which many more UM flows can be added to create greater understanding of the study area's resource dependencies. Going forward, together with policy analysis, UM can help untangle the complex intertwined resource dependencies that cities must address as they attempt to increase their environmental sustainability

Real Time Implementation of Model Reference Controller in a Spherical Tank Process

In non linear process, control of process parameters is one of the important problems particularly, long dead time and unstable process. In this paper, a Model Reference Controller is   implemented to improve the control performance for a spherical tank level process .The control method is combined with IMC and PD feedback where PD feedback is designed by Maclaurin series. The process dynamics are described by the transfer function model by utilizing the step test technique. Experimental results are furnished to illustrate the effectiveness of the Model Reference controller

Ethnobotanical investigations among tribes in Madurai District of Tamil Nadu (India)

BACKGROUND: An ethnobotanical survey was carried out to collect information on the use of medicinal plants in Southern Western Ghats of India (Madurai district, Tamil Nadu). Information presented in this paper was gathered from the paliyar tribes using an integrated approach of botanical collections, group discussions and interviews with questionnaires in the years 1998 – 1999. The informants interviewed were 12 among whom 4 were tribal practitioners. RESULTS: A total of 60 ethnomedicinal plant species distributed in 32 families are documented in this study. The medicinal plants used by paliyars are listed with Latin name, family, local name, parts used, mode of preparation and medicinal uses. Generally, fresh part of the plant was used for the preparation of medicine. CONCLUSION: We observed that the documented ethnomedicinal plants were mostly used to cure skin diseases, poison bites, stomachache and nervous disorders. The results of this study showed that these tribal people still depend on medicinal plants in Madurai district forest areas