Informatics Publishing Limited

M. Richitha ¹, V. Senthil Kumar ², Ravi Prakash Dwivedi ¹

Affiliations
1 VIT University, Chennai - 600 127, Tamilnadu, IN
2 ISRO Satellite Centre, Bangalore - 560 017, Karnataka, IN

Abstract

Aim of Findings: A modified mirror shaped waveguide-type stepped septum polarizer is suggested and verified using Ansoft HFSS. Mirror profile performs better than the conventional varying thickness polarizer in terms of phase-angle, reflection loss and isolation. Methodology Employed: The 3D structure has been simulated using HFSS. The parameters are initially optimized using a WASPNET tool and later implemented in HFSS.WASPNET is a specially designed tool which automatically adjusts the dimensions according to the specifications thus reducing mathematical computations. By performing a number of simulations regarding the thickness and dimension profiles, it is concluded that the performance parameters are not degraded. Final Results: FEM based simulations on the device suggest that mirror shaped waveguide-type profile performs better than the varying thickness profile waveguide-type septum. Initially the thickness of the septum has to be decided to construct an effective septum according to its requirements. Thickness of 0.3 mm performs better than the profiles greater than 0.5 mm thickness. Similarly, the varying thickness profile was simulated and set to 0.2–0.6 mm as it gives better performance. The axial ratio is measured in terms of the angle between the TE10 and TE01 modes, is seen to be 89.75/90.44 between S31 and S32 respectively, ideal value being 90 degrees. The S11 of mirror shaped septum gives reflection coefficient which is found to be greater than -31dB for the entire band compared to that of varying profile. The performance is found to exist over the entire band and not restricted to the center frequency. The isolation characteristics is >25dB which is better than the conventional design. This shows that a good isolation is maintained between both the ports.

Keywords

Mirror Shaped Septum Waveguide Polarizer, Square Waveguide Polarizer, Stepped Septum Polarizer

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V. Senthil Kumar ¹, K. Nithya ¹, P. Sagadevan ², K. Sujatha ³

Affiliations
1 Department of Biotechnology, Palanisamy College of Arts, Perundurai, Erode – 638052, Tamil Nadu, IN
2 Department of Biotechnology, KG College of Arts and Science, Coimbatore – 641035, Tamil Nadu, IN
3 Department of Zoology, Government Arts College, Coimbatore – 641018, Tamil Nadu, IN

Abstract

Since the beginning of screening of Phyto-chemicals, the use of natural products in medicinal application has reduced. Medicinal plants, since times immemorial, have been used for curing of many diseases as a source of medicine. The presence of study focuses on extraction of Psidium guajava and Punica granatum plant leaves for treatment against diarrhoeal infection. Different parts of the plants are considered to have potential medicinal properties and are used in different system of medicine. Two plant species Psidium guajava and Punica granatum were screened for bio-active compound and detection of anti-bacterial activity against isolated pathogenic strains.

Keywords

Antibacterial Activity, Phyto-Chemicals, Psidium guajava, Punica granatum.

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V. Senthil Kumar ¹, A. Dominic Infant Raj ², T. Naveen Kumar ³

Affiliations
1 Assistant Professor, Department of Forensic Medicine, Government Medical College, Sivagangai, IN
2 Assistant Professor, Department of Forensic Medicine, Trichy SRM Medical College and Research Centre , Irungalur, Trichy, IN
3 Associate Professor, Department of Forensic Medicine, Kempegowda Institute of Medical Sciences, Bangalore, IN

Abstract

Poisoning is a common day to day problem. Profile of poisoning in an area depends upon a variety of factors, ranging from access to and availability of poison, socio-economic status of the individual, cultural and religious influences, etc. A prospective study was carried out in the Department of Forensic medicine, Kempegowda Institute of Medical Sciences and Hospital Bangalore to study the socio- demographic profiling of deaths due to poisoning. Out of the 100 cases studied, incidence of poisoning was found to be more amongst the age group of 21 to 30 years in both sexes with mean age being 25.4 years and 25.4 years amongst males and females respectively. Poisoning is more in males (68%) as compared to females. In both the sexes, married (68%) outnumbered the unmarried in rural and urban community. This study shows that maximum number of poisoning cases were noticed among Upper Lower socio economic Class and in Nuclear families(61%). It was observed that majority of the victims were Graduate (28%).Financial constraints(22%) were the most common motive behind poisoning deaths.

Keywords

Poisoning Death, Autopsy, Socio-Demographic Profile, Motive.

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