Buck-Boost Interleaved Inverter Configuration for Multiple-Load Induction Cooking Application

Sharath Kumar. P,Vishwanathan. N,Bhagwan K. Murthy 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.1

Induction cooking application with multiple loads need high power inverters and appropriate control techniques. This paper proposes an inverter configuration with buck-boost converter for multiple load induction cooking application with independent control of each load. It uses one half-bridge for each load. For a given dc supply of VDC, one more VDC is derived using buckboost converter giving 2VDC as the input to each half-bridge inverter. Series resonant loads are connected between the centre point of 2 VDC and each half-bridge. The output voltage across each load is like that of a full-bridge inverter. In the proposed configuration, half of the output power is supplied to each load directly from the source and remaining half of the output power is supplied to each load through buck-boost converter. With buck-boost converter, each half-bridge inverter output power is increased to a full-bridge inverter output power level. Each half-bridge is operated with constant and same switching frequency with asymmetrical duty cycle (ADC) control technique. By ADC, output power of each load is independently controlled. This configuration also offers reduced component count. The proposed inverter configuration is simulated and experimentally verified with two loads. Simulation and experimental results are in good agreement. This configuration can be extended to multiple loads.

One pot synthesis of Cu₂O/RGO composite using mango bark extract and exploration of its electrochemical properties

Kumar, J. Sharath,Jana, Milan,Khanra, Partha,Samanta, Pranab,Koo, Hyeyoung,Murmu, Naresh Chandra,Kuila, Tapas Elsevier 2016 ELECTROCHIMICA ACTA Vol.193 No.-

<P><B>Abstract</B></P> <P>A facile and eco-friendly approach for the simultaneous reduction of graphene oxide (GO) as well as copper acetate to prepare Cu<SUB>2</SUB>O decorated reduced GO (RGO) has been demonstrated. Herein, an easily available and naturally occurring mango bark (<I>M. indica</I>) extract has been used as the reducing agent instead of hazardous and toxic chemicals. Fourier transform infrared and X-ray photoelectron spectroscopy have been performed to confirm the removal of oxygen functional groups from the surface of GO. X-ray diffraction pattern reveals the formation of Cu<SUB>2</SUB>O nanoparticles (NPs). Morphological characterization was carried out using field emission scanning electron and transmission electron microscopy to confirm the decoration of RGO with Cu<SUB>2</SUB>O NPs. The electrocatalytic behaviour of the RGO/Cu<SUB>2</SUB>O composite has been carried by cyclic voltammetry and amperometric analysis. It shows the utility of the RGO/Cu<SUB>2</SUB>O composite as an electrochemical sensor towards H<SUB>2</SUB>O<SUB>2</SUB> detection. The sensitivity and limit of detection for the composite are found to be 7.435μAμM<SUP>−1</SUP> & 42.35nM, respectively. The RGO/Cu<SUB>2</SUB>O//RGO asymmetric supercapacitor device shows the specific capacitance (SC) of 195Fg<SUP>−1</SUP> at a current density of 2Ag<SUP>−1</SUP> and energy density of 37.7 Whkg<SUP>−1</SUP> with 79% retention in SC after 5000 charge-discharge cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simultaneous bio-reduction of GO and CuSO<SUB>4</SUB> using mango bark extract is presented. </LI> <LI> The sensitivity and the LoD for H<SUB>2</SUB>O<SUB>2</SUB> are found to be 7.435μAμM<SUP>−1</SUP> & 42.35nM. </LI> <LI> Specific capacitance of the asymmetric device is 195Fg<SUP>−1</SUP> at 2Ag<SUP>−1</SUP>. </LI> <LI> Retention in specific capacitances is ∼79% after 5000 charge-discharge cycles. </LI> </UL> </P>

Multiple-Load Induction Cooking Application with Three-Leg Inverter Configuration

Sharath Kumar, P.,Vishwanathan, N.,Murthy, Bhagwan K. The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.5

Inverter configurations for multiple-load induction cooking applications need development. Inverter configurations for induction cooking applications are used in home appliances based on single coil inverters. For multiple-load configurations, multiple coils are used. They require proper inverters, which provide independent control for each load and have fewer components. This paper presents a three-leg inverter configuration for three load induction cooking applications. Each induction coil powers one induction cooking load. This configuration operates with constant switching frequency and powers individual loads. The output power of the required load is controlled with a phase-shift control technique. This configuration is simulated and experimentally tested with three induction loads. The simulation and experimental results are in good agreement. This configuration can be extended to more loads.

Multiple-Load Induction Cooking Application with Three-Leg Inverter Configuration

P. Sharath Kumar,N. Vishwanathan,Bhagwan K. Murthy 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.5

Inverter configurations for multiple-load induction cooking applications need development. Inverter configurations for induction cooking applications are used in home appliances based on single coil inverters. For multiple-load configurations, multiple coils are used. They require proper inverters, which provide independent control for each load and have fewer components. This paper presents a three-leg inverter configuration for three load induction cooking applications. Each induction coil powers one induction cooking load. This configuration operates with constant switching frequency and powers individual loads. The output power of the required load is controlled with a phase-shift control technique. This configuration is simulated and experimentally tested with three induction loads. The simulation and experimental results are in good agreement. This configuration can be extended to more loads.

Transgenic tomato expressing dsRNA of juvenile hormone acid O-methyl transferase gene of Helicoverpa armigera (Lepidoptera: Noctuidae) affects larval growth and its development

Navale Prakash M,Manamohan Maligeppagol,Asokan R.,Sharath Chandra G.,Prasad Babu K.,Latha J.,Krishna Kumar N.K.,Ellango R.,Krishna V. 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2

Helicoverpa armigera is an important pest infesting a number of crops of high commercial value leading to huge economic losses globally. RNA interference (RNAi) is a potent tool for the control of insect pests and towards this objective, transgenic tomato expressing dsRNA of Juvenile hormone acid methyl transferase (JHAMT) gene of H. armigera was developed. The H. armigera larvae fed on HaJHAMT tomato leaves led to a severe (90%) down regulation of the cognate gene expression thus adversely affected the feeding and metamorphosis. Reduction in larval and pupal weight and inability to undergo complete metamorphosis were observed that led to larval-pupal intermediates and subsequently affected the eclosion. Thus, JH down regulation is an attractive target due to specificity to insects and its important role in insect growth and development to engineer insect resistance in crops using RNAi.

Hardware Software Co-Simulation of the Multiple Image Encryption Technique Using the Xilinx System Generator

( Panduranga H T ),( Dr. Naveen Kumar S K ),( Sharath Kumar H S ) 한국정보처리학회 2013 Journal of information processing systems Vol.9 No.3

Abstract-Hardware-Software co-simulation of a multiple image encryption technique shall be described in this paper. Our proposed multiple image encryption technique is based on the Latin Square Image Cipher (LSIC). First, a carrier image that is based on the Latin Square is generated by using 256-bits of length key. The XOR operation is applied between an input image and the Latin Square Image to generate an encrypted image. Then, the XOR operation is applied between the encrypted image and the second input image to encrypt the second image. This process is continues until the nth input image is encrypted. We achieved hardware co-simulation of the proposed multiple image encryption technique by using the Xilinx System Generator (XSG). This encryption technique is modeled using Simulink and XSG Block set and synthesized onto Virtex 2 pro FPGA device. We validated our proposed technique by using the hardware software co-simulation method.

S-211 : Biventricular tachycardia induced by herbal medicine containing ephedra sinica

( Cheol Won Hyeon ),( Young Hwan Choi ),( Jun Hwan Cho ),( Kyung Joon Kim ),( Sharath Kumar ),( Seong Hyeop Hyeon ),( Jee Eun Kwon ),( Eun Young Kim ),( Seung Yong Shin ),( Wang Soo Lee ),( Kwang Je L 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1

Ephedra is a potent sympathomimetic agent with cardiovascular effects including tachyardia, positive inotropy, arterial vasoconstriction and hypertension. We report 1 case of biventricular tachycardia after taking herbal medicine containing ephedra sinica. A 77-year-old male with a 30-year-history of COPD prsented with acute onset chest discomfort and dyspnea. He was precribed herbal medicines containing ephedra sinica for abdominal discomfort 2 days ago. Initial electrocardiography (ECG, Fig. A) showed hemodynamically unstable monomorphic ventricular tachycardia with RBBB pattern in percordial leads, which was terminated by electrical cardioversion. ECG after cardioversion, atrial fibrillation was observed (Fig. B). About 1 hour later, hemodynamically unstable fast monomorphic ventricular tachycardia with LBBB pattern was spontaneously induced (Fig. C). Because of hemodynamic instability, additional electrical cardioversion was performed and sinus rhythm was restored (Fig.D). Electrolytes and arterial blood gas analyses were normal. To rule out structural heart disease, echocardiography was done and it revealed normal ejection fraction and no significant abnormalities. Coronary angiography showed a 80% stenosis in the proximal circumflex coronary artery and a 70% stenosis in the posterior descending artery. Percutanous coronary intervention was done to left circumflex artery. The patient was discharged on clopidogrel, warfarin, ACE inhibitor, beta-blocker, statin. His follow up was uneventful.

S-224 : The Early Repolarization Pattern EKG in patients with Acute Coronary Syndrome: IVUS study

( Cheol Won Hyeon ),( Young Hwan Choi ),( Jun Hwan Cho ),( Kyung Joon Kim ),( Sharath Kumar ),( Seong Hyeop Hyeon ),( Jee Eun Kwon ),( Eun Young Kim ),( Seung Yong Shin ),( Wang Soo Lee ),( Kwang Je L 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1

Background: Early repolarization pattern (ERP) has been considered as benign condition in great majority of cases. Recently, the presence of ERP can be an index of poor prognosis in various heart diseases. Method: We analyzed 59 consecutive patients with acute coronary syndrome underwent primary coronary intervention and virtual histology intravascular ultrasonography (VH-IVUS). Thin cap fibroatheroma (TCFA) was defined as necrotic core (NC) >10% of plaque area with a plaque burden of >40% and NC in contact with the lumen for >3 image slices. Positive remodeling was a remodeling index (lesion/reference vessel area) >1.05. The diagnostic criterion of ERP was defined when there is J-point elevation of ≥0.1 mV in two adjacent leads. Results: The presence of ERP was observed in 27 patients (45.8%). Although there was no significant difference in lesion length and remodeling index at minimal lumen area between the 2 groups, reference diameter and minimal luminal area were significantly smaller in patients with ERP (p=0.033, p=0.048, respectively). The lesion characteristics of patients with ERP demonstrated (1) more necrotic core (p<0.001), (2) lesser calcium component (p=0.028). Although the incidence of plaque rupture failed to demonstrate significant differences, TCFA was more frequently observed in patients with ERP (p=0.038). Conclusion: We report, for the first time, that the ERP in ACS might distinguish patients with more vulnerable plaque.

Multimodality Intravascular Imaging Assessment of Plaque Erosion versus Plaque Rupture in Patients with Acute Coronary Syndrome

권지은,이왕수,Gary S. Mintz,홍영준,이성윤,김기석,한주용,Kaup Sharath Kumar,원호연,현승협,신승용,이광제,김태호,김치정,김상욱 대한심장학회 2016 Korean Circulation Journal Vol.46 No.4

Background and Objectives: We assessed plaque erosion of culprit lesions in patients with acute coronary syndrome in real world practice. Subjects and Methods: Culprit lesion plaque rupture or plaque erosion was diagnosed with optical coherence tomography (OCT). Intravascular ultrasound (IVUS) was used to determine arterial remodeling. Positive remodeling was defined as a remodeling index (lesion/ reference EEM [external elastic membrane area) >1.05. Results: A total of 90 patients who had plaque rupture showing fibrous-cap discontinuity and ruptured cavity were enrolled. 36 patients showed definite OCT-plaque erosion, while 7 patients had probable OCT-plaque erosion. Overall, 26% (11/43) of definite/probable plaque erosion had non-ST elevation myocardial infarction (NSTEMI) while 35% (15/43) had ST elevation myocardial infarction (STEMI). Conversely, 14.5% (13/90) of plaque rupture had NSTEMI while 71% (64/90) had STEMI (p<0.0001). Among plaque erosion, white thrombus was seen in 55.8% (24/43) of patients and red thrombus in 27.9% (12/43) of patients. Compared to plaque erosion, plaque rupture more often showed positive remodeling (p=0.003) with a larger necrotic core area examined by virtual histology (VH)-IVUS, while negative remodeling was prominent in plaque erosion. Overall, 65% 28/43 of plaque erosions were located in the proximal 30 mm of a culprit vessel-similar to plaque ruptures (72%, 65/90, p=0.29). Conclusion: Although most of plaque erosions show nearly normal coronary angiogram, modest plaque burden with negative remodeling and an uncommon fibroatheroma might be the nature of plaque erosion. Multimodality intravascular imaging with OCT and VH-IVUS showed fundamentally different pathoanatomic substrates underlying plaque rupture and erosion.

IM-133N - A Useful Herbal Combination for Eradicating Disease-triggering Pathogens in Mice via Immunotherapeutic Mechanisms

Syed Firashathulla,Mohammed Naseeruddin Inamdar,Mohamed Rafiq,Gollapalle Lakshminarayanashastry Viswanatha,Lakkavalli Mohan Sharath Kumar,Uddagiri Venkanna Babu,Shyam Ramakrishnan,Rangesh Paramesh 대한약침학회 2016 Journal of pharmacopuncture Vol.19 No.1

Objectives: The present study was undertaken to evaluate the immunomodulatory (IM) activity of IM-133N, a herbal combination in various immunotherapeutic experimental models. Methods: The IM activity of IM-133N was evaluated against three experimental models namely, effect of IM- 133N against Escherichia coli (E. coli)-induced abdominal sepsis in mice, and carbon clearance test was performed in Wistar albino rats to evaluated the phagocytic potential of IM-133N, in addition IM-133N was evaluated for its immunoglobulin enhancing potential in rats, where the immunoglobulin levels were measured by zinc sulphate turbity (ZST) test. Further, IM-133N was subjected for detailed liquid chromatography-mass spectrometry (LC-MS)/MS analysis to identify the probable active constituents present in it. Results: The findings of the present study has demonstrated very promising IM property of IM-133N in all the experimental models. Briefly, pretreatment with IM-133N at 125, 250, 500 and 1,000 mg/kg, p.o. doses had protected the mice against E. coli-induced abdominal sepsis and mortality, further the effect of IM- 133N was found to be significant and dose-dependent. In support of this, in another study administration of IM-133N showed a significant and dose-dependent increase in serum immunoglobulin levels, estimated by ZST test. In line with the above findings, in the carbon clearance test the low doses (125 and 250 mg/ kg, p.o.) of IM-133N increased the rate of carbon clearance, whereas the higher doses (500 and 1,000 mg/kg, p.o.) did not sustain the response, and saturation effect was considered as one of the possible reason for futility of higher doses for IM-133N. In addition, A detailed LC-MS/MS analysis of IM-133N showed 17 bioactive phytochemical constituents: namely, apigenin, chaulmoogric acid, mesquitol, quercetin, symphoxanthone, salireposide, β-sitosterol, nonaeicosanol, β-amyrin, betulic acid, oleanolic acid, symplososide, symponoside, symploveroside, symplocomoside, symconoside A and locoracemoside B. Conclusion: These findings suggest that IM-133N possesses significant IM activity and, hence, could be useful for eradicating opportunistic disease-triggering pathogens via immunotherapeutic mechanisms. The findings also suggest IM-133N may also useful in other immunity disorders.