POSE-VIWEPOINT ADAPTIVE OBJECT TRACKING VIA ONLINE LEARNING APPROACH

Mariappan, Vinayagam,Kim, Hyung-O,Lee, Minwoo,Cho, Juphil,Cha, Jaesang The Institute of Internet 2015 International journal of advanced smart convergenc Vol.4 No.2

In this paper, we propose an effective tracking algorithm with an appearance model based on features extracted from a video frame with posture variation and camera view point adaptation by employing the non-adaptive random projections that preserve the structure of the image feature space of objects. The existing online tracking algorithms update models with features from recent video frames and the numerous issues remain to be addressed despite on the improvement in tracking. The data-dependent adaptive appearance models often encounter the drift problems because the online algorithms does not get the required amount of data for online learning. So, we propose an effective tracking algorithm with an appearance model based on features extracted from a video frame.

Carbyne-enriched carbon anchored on nickel foam: A novel binder-free electrode for supercapacitor application

Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Kim, Sang-Jae Elsevier 2019 JOURNAL OF COLLOID AND INTERFACE SCIENCE - Vol.556 No.-

<P><B>Abstract</B></P> <P>Carbon- and carbon derivatives are widely employed as efficient electrode materials for supercapacitor applications. Herein, we demonstrate a cost-effective dip-coating process followed by dehydrohalogenation of PVDF-Ni for the preparation of carbyne enriched carbon anchored on nickel (CEC-Ni) as high-performance electrode material. The removal of halogens in the prepared CEC-Ni were widely characterized using XRD, XPS, Laser Raman, and FT-IR analysis. The occurrence of carbon-carbon vibration in the prepared CEC-Ni foam was confirmed using FT-IR spectroscopy. Laser Raman analysis confirms that the CEC-Ni foam contains both sp and sp<SUP>2</SUP> hybridized carbon. The electrochemical properties of prepared carbyne enriched carbon anchored on nickel foam electrode (CEC-NiE) showed an ideal capacitive properties and delivered a maximum specific capacitance of about 106.12 F g<SUP>−1</SUP> with excellent cyclic retention. Furthermore, the mechanism of charge-storage in the CEC-NiE was analyzed using Dunn’s method. In additon, the asymmetric supercapacitor device was fabricated using CEC-NiE as positive and rGO as negative electrode achieved a remarkable energy density of 33.57 Wh Kg<SUP>−1</SUP> with a maximal power density of 14825.71 W Kg<SUP>−1</SUP>. These results suggested that the facile preparation of CEC-NiE could be a promising and effective electrode material for future energy storage application.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Nanostructured ternary metal chalcogenide-based binder-free electrodes for high energy density asymmetric supercapacitors

Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Nardekar, Swapnil Shital,Kim, Sang-Jae Elsevier 2019 Nano energy Vol.57 No.-

<P><B>Abstract</B></P> <P>An essential way to enhance the energy density of a supercapacitor(SC) is to use high capacitance electrode materials via developing binder-free electrode with porous and hierarchical nanostructures. Herein, we demonstrated the use of copper antimony sulfide (Cu<SUB>3</SUB>SbS<SUB>4</SUB>) nanowires directly grown on Ni foam (using a microwave-irradiation process) as a binder-free positive electrode for SCs. The growth mechanism, effect of microwave irradiation time on the morphology and electrochemical properties of Cu<SUB>3</SUB>SbS<SUB>4</SUB> on Ni foam were discussed in detail. The cyclic voltammetric studies (using three-electrode test) of Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 electrode showed the presence of Type-C battery-like charge-storage properties. The Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 electrode delivered a high specific capacity (835.24 mA h g<SUP>−1</SUP>) as obtained from the charge-discharge analysis (at a current density of 2.5 mA cm<SUP>−2</SUP>). Further, the device specific properties of the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 positive electrode was examined via fabricating asymmetric supercapacitors (ASCs) using two different negative electrodes viz. (i) planar-graphene, and (ii) binder-free copper molybdenum sulfide anchored on Ni foam (Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni) electrodes, respectively. The electrochemical analyses of the fabricated ASCs revealed that the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC possess almost 3.0-fold higher energy density compared to the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║graphene ASC. The Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC delivered a high specific device capacitance of 213.6 F g<SUP>−1</SUP> with a remarkable energy density (58.15 Wh kg<SUP>−1</SUP>), maximum power density (6363.63 W kg<SUP>−1</SUP>), and better cycle-life. The use of two different binder-free electrodes in the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC results in their superior performance metrics over the reported ASCs, thus, highlighting their potential applications towards next-generation supercapacitors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cu<SUB>3</SUB>SbS<SUB>4</SUB> nanowires were directly grown on Ni foam via microwave irradiation process. </LI> <LI> Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni and Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni electrode are used as positrode and negatrode for ASC. </LI> <LI> Charge storage mechanism of Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni and Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni electrodes are discussed. </LI> <LI> Merits of binder-free electrode over planar-type electrode for ASC is demonstrated. </LI> <LI> Use of two binder free electrode in ASC results in high energy and power density. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Electrodeposited molybdenum selenide sheets on nickel foam as a binder-free electrode for supercapacitor application

Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Kim, Sang-Jae Elsevier 2018 ELECTROCHIMICA ACTA Vol.265 No.-

<P><B>Abstract</B></P> <P>Two-dimensional nanostructured metal chalcogenides have significant consideration as electrode materials for energy storage application owing to their fascinating properties. In this work, we have grown two-dimensional MoSe<SUB>2</SUB> sheets directly on the surface of nickel foam via facile one-step electrochemical deposition method and examined their use as a binder-free electrode for supercapacitor. The physicochemical characterizations such as X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectrum, and Raman analysis confirmed the formation of MoSe<SUB>2</SUB> sheets on Ni foam. The effect of deposition time (5 and 10 min) on the electrochemical properties of the MoSe<SUB>2</SUB> sheets are examined in detail using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopic analyses, respectively. The cyclic voltammetry profiles confirmed that the charge-storage mechanism in MoSe<SUB>2</SUB> sheets is due to the ion intercalation/de-intercalation kinetics. A high specific capacity of 548 mAh g<SUP>−1</SUP> was obtained for the MoSe<SUB>2</SUB>/Ni electrode from CV profile measured using a scan rate of 5 mV s<SUP>−1</SUP>. The MoSe<SUB>2</SUB>/Ni electrode delivered a specific capacity of 325.92 mAh g<SUP>−1</SUP> from charge-discharge analysis obtained at constant discharge current density of 4 mA cm<SUP>−2</SUP> with good cyclic stability. The capacitive properties and the mechanism of charge-storage in the MoSe<SUB>2</SUB>/Ni electrode deposited at different time intervals were examined by the electrochemical impedance spectroscopy using Nyquist and Bode phase angle plot. The experimental results ensure that the MoSe<SUB>2</SUB>/Ni electrode might be used as the high-performance electrode for the next-generation energy storage devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A facile electrochemical deposition of MoSe<SUB>2</SUB> sheets on Ni foam was demonstrated. </LI> <LI> Field emission scanning electroscope confirms the growth of MoSe<SUB>2</SUB> sheet on Ni foam. </LI> <LI> Raman spectrum revealed the formation of few layered MoSe<SUB>2</SUB> sheets on Ni foam. </LI> <LI> The binder free MoSe<SUB>2</SUB> electrode delivered a high specific capacity of 548 mAh g<SUP>−1</SUP>. </LI> <LI> The MoSe<SUB>2</SUB>/Ni electrode shows excellent cyclic stability over 1000 cycles. </LI> </UL> </P>

Layered famatinite nanoplates as an advanced pseudocapacitive electrode material for supercapacitor applications

Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Kim, Sang-Jae Elsevier 2018 ELECTROCHIMICA ACTA Vol.275 No.-

<P><B>Abstract</B></P> <P>In this study, a facile one-pot hydrothermal route has been employed for the preparation of Cu<SUB>3</SUB>SbS<SUB>4</SUB> nanoplates and its use as an electrode material for supercapacitors has been demonstrated. The physico-chemical characterizations such as X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscope, and laser Raman spectroscopic studies revealed the formation of Cu<SUB>3</SUB>SbS<SUB>4</SUB> with plate-like structures. The electrochemical properties of the Cu<SUB>3</SUB>SbS<SUB>4</SUB> electrodes was studied using cyclic voltammetry (CV), galvanostatic charge-discharge (CD) and electrochemical impedance spectroscopy (EIS) analyses. The CV analysis indicated the presence of a pair of redox peaks suggesting the pseudocapacitive nature of the Cu<SUB>3</SUB>SbS<SUB>4</SUB> electrode with a high specific capacitance of 60 F g<SUP>−1</SUP> (obtained at a scan rate of 5 mV s<SUP>−1</SUP>). The Cu<SUB>3</SUB>SbS<SUB>4</SUB> electrode possess a specific capacitance of about 41.78 F g<SUP>−1</SUP> obtained from the CD profiles recorded using an applied current of 0.25 mA. The Cu<SUB>3</SUB>SbS<SUB>4</SUB> electrode possess a high energy of about 11.375 Wh kg<SUP>−1</SUP> and power density of 175 W kg<SUP>−1</SUP> with excellent cyclic stability over 2500 cycles. The collective findings of this work suggested that the use of Cu<SUB>3</SUB>SbS<SUB>4</SUB> nanoplates as an advanced electrode for supercapacitor applications.</P>

Optical Filter Design for Fluorescence Technique Based Phycocyanin Measurement Sensor Used In Water Treatment Plants

Mariappan, Vinayagam,Lee, Sung Hwa,Yang, Seungyoun,Kim, Jintae,Lee, Minwoo The Institute of Internet 2018 International Journal of Internet, Broadcasting an Vol.10 No.2

Recently the water management department advised the water treatment industry to focus on deploy the chemical free and the environmentally responsible process to adopt on water treatment plants in every country. In this objective, water treatment process started using ultrasonic based phycocyanin extraction with fluorescence measurement techniques to detect the change in the yield of phycocyanin. This paper propose the design of optical filter model for fluorescence technique based immersive optical phycocyanin measurement sensor design. The proposed design uses the multi-wavelength sensor module for irradiating part, and this plays a role of removing a wavelength band other than 590 ~ 620 nm. The preliminary study on immersed phycocyanin sensor, the fluorescence value of picocyanin according to the ultrasonic intensity, treatment time and number of cells was measured using JM phycocyanin module to emulate the proposed design, and were compared performance of the proposed sensor emulation. In this design, the phycocyanin fluorescence value increased about 2.1 ~ 4.7 times as the ultrasonic treatment time increased as compared with JM phycocyanin module, and the phycocyanin fluorescence value within the analysis range was obtained by ultrasonic treatment within one minute.

Two dimensional famatinite sheets decorated on reduced graphene oxide: A novel electrode for high performance supercapacitors

Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Kesavan, Dhanasekar,Kim, Sang-Jae Elsevier 2019 Journal of Power Sources Vol.433 No.-

<P><B>Abstract</B></P> <P>Layered ternary metal chalcogenides and their hybrids are receiving fabulous attention as electrode materials for supercapacitors. Herein, we report a facile one-step hydrothermal preparation of layered famatinite/graphene hybrid-sheets and explored its electrochemical properties as a negative electrode for supercapacitors. The mechanism of formation of 2D/2D hybrid heterostructures comprising famatinite and graphene sheets is discussed using physico-chemical characterization such as X-ray diffraction, Raman spectroscopy, and field emission scanning electron microscopic analyses respectively. The famatinite/graphene hybrid-sheet electrode demonstrates high specific capacitance of about 527.76 F g<SUP>−1</SUP> (specific capacity of 205.24 mAh g<SUP>−1</SUP>) which is 5- and 3- fold higher compared to the bare famatinite and graphene electrodes. This astonishing performance of famatinite/graphene hybrid electrode is due to the enhancement of electrolyte ion insertion/extraction kinetics compared to that of bare famatinite and graphene electrodes, as evidenced using Dunn's method. Further, the famatinite/graphene symmetric supercapacitor exhibits an excellent energy density of about 13.45 Wh kg<SUP>−1</SUP> with the maximal power density of 1250 W kg<SUP>−1</SUP>. Additionally, famatinite/graphene symmetric supercapacitor displays high cyclic stability of 95.5% with marvellous rate capability, indicating great promise towards the commercialization of energy storage device.</P> <P><B>Highlights</B></P> <P> <UL> <LI> 2D famatinite sheets decorated rGO is prepared via one-step hydrothermal method. </LI> <LI> The charge-storage mechanism for a hybrid electrode is reviled. </LI> <LI> The famatinite/graphene SSC exhibit an excellent energy density of 13.45 Wh kg<SUP>−1</SUP>. </LI> <LI> Famatinite/graphene SSC shows outstanding stability and marvelous rate capability. </LI> </UL> </P>

OnBoard Vision Based Object Tracking Control Stabilization Using PID Controller

Mariappan, Vinayagam,Lee, Minwoo,Cho, Juphil,Cha, Jaesang The International Promotion Agency of Culture Tech 2016 International Journal of Advanced Culture Technolo Vol.4 No.4

In this paper, we propose a simple and effective vision-based tracking controller design for autonomous object tracking using multicopter. The multicopter based automatic tracking system usually unstable when the object moved so the tracking process can't define the object position location exactly that means when the object moves, the system can't track object suddenly along to the direction of objects movement. The system will always looking for the object from the first point or its home position. In this paper, PID control used to improve the stability of tracking system, so that the result object tracking became more stable than before, it can be seen from error of tracking. A computer vision and control strategy is applied to detect a diverse set of moving objects on Raspberry Pi based platform and Software defined PID controller design to control Yaw, Throttle, Pitch of the multicopter in real time. Finally based series of experiment results and concluded that the PID control make the tracking system become more stable in real time.

OWC based Smart TV Remote Controller Design Using Flashlight

Mariappan, Vinayagam,Lee, Minwoo,Choi, Byunghoon,Kim, Jooseok,Lee, Jisung,Choi, Seongjhin The Institute of Internet 2018 International Journal of Internet, Broadcasting an Vol.10 No.1

The technology convergence of television, communication, and computing devices enables the rich social and entertaining experience through Smart TV in personal living space. The powerful smart TV computing platform allows to provide various user interaction interfaces like IR remote control, web based control, body gesture based control, etc. The presently used smart TV interaction user control methods are not efficient and user-friendly to access different type of media content and services and strongly required advanced way to control and access to the smart TV with easy user interface. This paper propose the optical wireless communication (OWC) based remote controller design for Smart TV using smart device Flashlights. In this approach, the user smart device act as a remote controller with touch based interactive smart device application and transfer the user control interface data to smart TV trough Flashlight using visible light communication method. The smart TV built-in camera follows the optical camera communication (OCC) principle to decode data and control smart TV user access functions according. This proposed method is not harmful as radio frequency (RF) radiation does it on human health and very simple to use as well user does need to any gesture moves to control the smart TV.

Synthesis and Antidiabetic Evaluation of Benzothiazole Derivatives

Mariappan, G.,Prabhat, P.,Sutharson, L.,Banerjee, J.,Patangia, U.,Nath, S. Korean Chemical Society 2012 대한화학회지 Vol.56 No.2

A novel series of benzothiazole derivatives were synthesized and assayed in vivo to investigate their hypoglycemic activity by streptozotocin-induced diebetic model in rat. These derivatives showed considerable biological efficacy when compared to glibenclamide, a potent and well known antidiabetic agent as a reference drug. All the compounds were effective, amongst them 3d showed more prominent activity at 100 mg/kg p.o. The experimental results are statistically significant at p<0.01 and p<0.05 level.