A Distance Metric Computation Model for the Design and Development of Palm Vein Recognition System

Shriram D. Raut,Dr. Vikas T. Humbe 보안공학연구지원센터 2015 International Journal of Bio-Science and Bio-Techn Vol.7 No.6

Palm vein recognition is a part of physiological biometric uses blood vessel structure for the identification. The blood transfusion from body parts to heart is made by the blood vein. The blood vein carries de-oxygenated hemoglobin that can be sensed under near infrared light. The pattern classification proposes a design cycle to build a system for recognition. The image database was obtained from Hong Kong Polytechnic University. The experimentation was carried on palm vein image captured under near infrared light. The distance metric computation was done and stored in the form of the template. The paper discuss about the experimentation of Euclidean distance metric on the palm vein feature extracted binary image using Gabor filter and canny edge detection.

In Vitro Propagation Through Nodal Explants in Helicteres isora L., a Medicinally Important Plant

Shriram, Varsha,Kumar, Vinay,Shitole, M.G. The Korean Society of Plant Biotechnology 2007 식물생명공학회지 Vol.34 No.3

Helicteres isora is medicinally important plant effective against asthma, diabetes, hypolipidemia, HIV, besides a good source of diosgenin. Seed dormancy and low rate of natural fruit production make this plant a perfect candidate for developing an in vitro method useful for its clonal propagation and further biotechnological developments. This is the first report on in vitro production of this plant. Nodal explants obtained from aseptically germinated seedlings were cultured on MS medium (Murashige and Skoog 1962) fortified with indole-3-acetic acid (IAA) ($0.57-22.83\;{\mu}M$), indole-3-butyric acid (IBA) ($0.41-16.58\;{\mu}M$), 6-benzylaminopurine (BA) ($0.44-17.75\;{\mu}M$) and kinetin (Kin) ($0.46-13.94\;{\mu}M$) either singly or in combinations of IAA + BA, IAA + Kin and BA + Kin. Combinations of cytokinins (BA and Kin) were most suitable for multiple shoot induction and $13.94\;{\mu}M\;Kin\;+\;13.31\;{\mu}M\;BA$ was optimum (79% frequency) associated with high number of microshoots (7.1 shoots per explant) after 20 days of culture. Maximum shoot elongation and proliferation (10 shoots per explant with 4.8 cm average height) was achieved on MS media containing $2.32\;{\mu}M\;Kin\;+\;2.22\;{\mu}M\;BA\;+\;2.85\;{\mu}M\;IAA$. High rooting frequency (70%) was achieved on MS medium (1/2 basal strength) fortified with $4.14\;{\mu}M$ IBA, while activated charcoal showed inhibitory effects on rooting. Hardening was done with 76% survival rate and these plants were growing without any visual defects and morphologically mimicking the naturally growing plants.

PD Signal Time-Frequency Map and PRPD Pattern Analysis of Nano SiO₂ Modified Palm Oil for Transformer Insulation Applications

Arvind Shriram, R.K.,Chandrasekar, S.,Karthik, B. The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.2

In recent times, development of nanofluid insulation for power transformers is a hot research topic. Many researchers reported the enhancement in dielectric characteristics of nano modified mineral oils. Considering the drawbacks of petroleum based mineral oil, it is necessary to understand the dielectric characteristics of nanofluids developed with natural ester based oils. Palm oil has better insulation characteristics comparable to mineral oil. However very few research reports is available in the area of nanofluids based on palm oil. Partial discharge (PD) is one of the major sources of insulation performance degradation of transformer oil. It is essential to understand the partial discharge(PD) characteristics by collecting huge data base of PD performance of nano modified palm oil which will increase its confidence level for power transformer application. Knowing these facts, in the present work, certain laboratory experiments have been performed on PD characteristics of nano $SiO_2$ modified palm oil at different electrode configurations. Influence of concentration of nano filler material on the PD characteristics is also studied. Partial discharge inception voltage, Phase resolved partial discharge (PRPD) pattern, PD signal time-frequency domain characteristics, PD signal equivalent timelength-bandwidth mapping, Weibull distribution statistical parameters of PRPD pattern, skewness, repetition rate and phase angle variations are evaluated at different test conditions. From the results of the experiments conducted, we came to understand that PD performance of palm oil is considerably enhanced with the addition of $nano-SiO_2$ filler at 0.01%wt and 0.05%wt concentration. Significant reduction in PD inception voltage, repetition rate, Weibull shape parameter and PD magnitude are noticed with addition of $SiO_2$ nanofillers in palm oil. These results will be useful for recommending nano modified palm oil for power transformer applications.

Pseudo-Rank Functions on Rickart *-rings

Nimbhorkar, Shriram Khanderao Department of Mathematics 2009 Kyungpook mathematical journal Vol.49 No.1

Pseudo-rank functions on Rickart *-rings are introduced and their properties are studied.

Population dynamics, age composition and survival of Downsiomyia nivea in relation to transmission of diurnally subperiodic filariasis

A.N. Shriram,K. Krishnamoorthy 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.1

Diurnally subperiodicWuchereria bancrofti (DSPWB) filariasis is transmitted by the Downsiomyia nivea. In India,it is prevalent only in the Nicobar district of Andaman and Nicobar Islands. Knowledge of the population dynamics and bio-ecology of vectors is crucial to develop intervention measures. Entomological studies were performed for 12 months by collecting mosquitoes that landed on human baits for feeding in Teressa Island. Age composition, mosquitoes that had laid eggs at least once, finite rate of natural increase (λ) and vector survival reflecting the population dynamics of Do. nivea in relation to transmission of filariasis were estimated. A total of 3625 Do. nivea were collected. Changes in finite rate of increase (λN1) during favorable months indicate an increase in the vector population, suggesting the need for intensified intervention. The proportion ofmosquitoes completing more than one gonotrophic cycle was higher in months when λ was 1. Do. nivea abundance and its parous densities varied with seasons. Survival of Do. nivea (indicated by the proportion of parous mosquitoes)was lower in the pre-monsoon season than during the monsoon and post-monsoon seasons. The probability of the daily survival of Do. nivea through one gonotrophic cycle was 0.75, with a declining trend as age increased. The maximum transmission of DSPWB occurred during the pre-monsoon, followed by the late monsoon, postmonsoon and monsoon seasons. Perennial transmission is evident. Therefore intervention measures must be planned throughout the year. Prospects of vector control are limited due to the cryptic breeding and diurnal biting habits. Mass chemotherapy with a single dose of an antifilarial drug is a potential option for control.

PD Signal Time-Frequency Map and PRPD Pattern Analysis of Nano SiO₂ Modified Palm Oil for Transformer Insulation Applications

R. K.Arvind Shriram,S.Chandrasekar,B.Karthik 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.2

In recent times, development of nanofluid insulation for power transformers is a hot research topic. Many researchers reported the enhancement in dielectric characteristics of nano modified mineral oils. Considering the drawbacks of petroleum based mineral oil, it is necessary to understand the dielectric characteristics of nanofluids developed with natural ester based oils. Palm oil has better insulation characteristics comparable to mineral oil. However very few research reports is available in the area of nanofluids based on palm oil. Partial discharge (PD) is one of the major sources of insulation performance degradation of transformer oil. It is essential to understand the partial discharge(PD) characteristics by collecting huge data base of PD performance of nano modified palm oil which will increase its confidence level for power transformer application. Knowing these facts, in the present work, certain laboratory experiments have been performed on PD characteristics of nano SiO2 modified palm oil at different electrode configurations. Influence of concentration of nano filler material on the PD characteristics is also studied. Partial discharge inception voltage, Phase resolved partial discharge (PRPD) pattern, PD signal time-frequency domain characteristics, PD signal equivalent timelength-bandwidth mapping, Weibull distribution statistical parameters of PRPD pattern, skewness, repetition rate and phase angle variations are evaluated at different test conditions. From the results of the experiments conducted, we came to understand that PD performance of palm oil is considerably enhanced with the addition of nano-SiO₂ filler at 0.01%wt and 0.05%wt concentration. Significant reduction in PD inception voltage, repetition rate, Weibull shape parameter and PD magnitude are noticed with addition of SiO₂ nanofillers in palm oil. These results will be useful for recommending nano modified palm oil for power transformer applications.

Increased Risk of Progression of Coronary Artery Calcification in Male Subjects with High Baseline Waist-to-Height Ratio: The Kangbuk Samsung Health Study

오형근,Shriram Nallamshetty,이은정 대한당뇨병학회 2016 Diabetes and Metabolism Journal Vol.40 No.1

Background: The waist-to-height ratio (WHtR) is an easy and inexpensive adiposity index that reflects central obesity. In this study, we examined the association of baseline WHtR and progression of coronary artery calcification (CAC) over 4 years of follow-up in apparently healthy Korean men. Methods: A total of 1,048 male participants (mean age, 40.9 years) in a health-screening program in Kangbuk Samsung Hospital, Seoul, Korea who repeated a medical check-up in 2010 and 2014 were recruited. Baseline WHtR was calculated using the value for the waist in 2010 divided by the value for height in 2010. The CAC score (CACS) of each subject was measured by multi-detector computed tomography in both 2010 and 2014. Progression of CAC was defined as a CACS change over 4 years greater than 0. Results: During the follow-up period, progression of CAC occurred in 278 subjects (26.5%). The subjects with CAC progression had slightly higher but significant baseline WHtR compared to those who did not show CAC progression (0.51±0.04 vs. 0.50±0.04, P<0.01). The proportion of subjects with CAC progression significantly increased as the baseline WHtR increased from the 1st quartile to 4th quartile groups (18.3%, 18.7%, 28.8%, and 34.2%; P<0.01). The risk for CAC progression was elevated with an odds ratio of 1.602 in the 4th quartile group of baseline WHtR even after adjustment for confounding variables (95% confidence interval, 1.040 to 2.466). Conclusion: Increased baseline WHtR was associated with increased risk for CAC progression. WHtR might be a useful screening tool to identify individuals at high risk for subclinical atherosclerosis.

Enhanced proline accumulation and salt stress tolerance of transgenic indica rice by over-expressing P5CSF129A gene

Kumar, Vinay,Shriram, Varsha,Kishor, P.B. Kavi,Jawali, Narendra,Shitole, M.G. The Korean Society of Plant Biotechnology 2010 Plant biotechnology reports Vol.4 No.1

[ ${\Delta}^1$ ]pyrroline-5-carboxylate synthetase (P5CS) is a proline biosynthetic pathway enzyme and is known for conferring enhanced salt and drought stress in transgenics carrying this gene in a variety of plant species; however, the wild-type P5CS is subjected to feedback control. Therefore, in the present study, we used a mutagenized version of this osmoregulatory gene-P5CSF129A, which is not subjected to feedback control, for producing transgenic indica rice plants of cultivar Karjat-3 via Agrobacterium tumefaciens. We have used two types of explants for this purpose, namely mature embryo-derived callus and shoot apices. Various parameters for transformation were optimized including antibiotic concentration for selection, duration of cocultivation, addition of phenolic compound, and bacterial culture density. The resultant primary transgenic plants showed more enhanced proline accumulation than their non-transformed counterparts. This proline level was particularly enhanced in the transgenic plants of next generation ($T_1$) under 150 mM NaCl stress. The higher proline level shown by transgenic plants was associated with better biomass production and growth performance under salt stress and lower extent of lipid peroxidation, indicating that overproduction of proline may have a role in counteracting the negative effect of salt stress and higher maintenance of cellular integrity and basic physiological processes under stress.

Methods for evaluating effects of unloader knee braces on joint health: a review

Rizuwana Parween,Duraisamy Shriram,Rajesh Elara Mohan,Yee Han Dave Lee,Karupppasamy Subburaj 대한의용생체공학회 2019 Biomedical Engineering Letters (BMEL) Vol.9 No.2

The paper aims to provide a state-of-the-art review of methods for evaluating the eff ectiveness and eff ect of unloaderknee braces on the knee joint and discuss their limitations and future directions. Unloader braces are prescribed as a nonpharmacologicalconservative treatment option for patients with medial knee osteoarthritis to provide relief in terms of painreduction, returning to regular physical activities, and enhancing the quality of life. Methods used to evaluate and monitorthe eff ectiveness of these devices on patients’ health are categorized into three broad categories (perception-, biochemical-,and morphology-based), depending upon the process and tools used. The main focus of these methods is on the short-termclinical outcome (pain or unloading effi ciency). There is a signifi cant technical, research, and clinical literature gap in understandingthe short- and long-term consequences of these braces on the tissues in the knee joint, including the cartilage andligaments. Future research directions may complement existing methods with advanced quantitative imaging (morphological,biochemical, and molecular) and numerical simulation are discussed as they off er potential in assessing long-term andpost-bracing eff ects on the knee joint.

In Vitro Propagation Through Nodal Explants in Helicteres isora L., a Medicinally Important Plant

M. G. Shitole,Varsha Shriram,Vinay Kumar 한국식물생명공학회 2007 JOURNAL OF PLANT BIOTECHNOLOGY Vol.34 No.3

Helicteres isora is medicinally important plant effective against asthma, diabetes, hypolipidemia, HIV, besides a good source of diosgenin. Seed dormancy and low rate of natural fruit production make this plant a perfect candidate for developing an in vitro method useful for its clonal propagation and further biotechnological developments. This is the first report on in vitro production of this plant. Nodal explants obtained from aseptically germinated seedlings were cultured on MS medium (Murashige and Skoog 1962) fortified with indole-3-acetic acid (IAA) (0.57–22.83 μM), indole-3-butyric acid (IBA) (0.41–16.58 μM), 6- benzylaminopurine (BA) (0.44–17.75 μM) and kinetin (Kin) (0.46–13.94 μM) either singly or in combinations of IAA+BA, IAA+Kin and BA+Kin. Combinations of cytokinins (BA and Kin) were most suitable for multiple shoot induction and 13.94 μM Kin+13.31 μM BA was optimum (79% frequency) associated with high number of microshoots (7.1 shoots per explant) after 20 days of culture. Maximum shoot elongation and proliferation (10 shoots per explant with 4.8 cm average height) was achieved on MS media containing 2.32 μM Kin+2.22 μM BA+2.85 μM IAA. High rooting frequency (70%) was achieved on MS medium (½ basal strength) fortified with 4.14 μM IBA, while activated charcoal showed inhibitory effects on rooting. Hardening was done with 76% survival rate and these plants were growing without any visual defects and morphologically mimicking the naturally growing plants.