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    120 MeV Ag ion induced effects in Au/HfO < inf > 2 < /inf > /Si MOSCAPs
    ( 2018-05-08) Manikanthababu, N. ; Prajna, K. ; Pathak, A. P. ; Rao, S. V.S.Nageswara
    HfO2/Si thinfilms were deposited by RF sputtering technique. 120 MeV Ag ion irradiation has been used to study the electrical properties of Au/HfO2/Si MOSCAPs. SHI (120 MeV Ag) induced annealing, defects creation and intermixing effects on the electrical properties of these systems have been studied. Here, we have observed that the high electronic excitation can cause a significant reduction of leakage currents in these MOSCAP devices. Various quantum mechanical tunneling phenomenon has been observed from the I-V characteristics.
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    120 MeV Ag ion irradiation induced intermixing, grain fragmentation in HfO < inf > 2 < /inf > /GaO < inf > x < /inf > thin films and consequent effects on the electrical properties of HfO < inf > 2 < /inf > /GaO < inf > x < /inf > /Si-based MOS capacitors
    ( 2020-01-02) Vinod Kumar, K. ; Arun, N. ; Mangababu, A. ; Ojha, Sunil ; Nageswara Rao, S. V.S. ; Pathak, A. P.
    On p-type Silicon (100) substrates GaOx (150 nm) and HfO2 (30 nm) thin films have been synthesized using the RF magnetron sputtering method. After 120 MeV Ag SHI irradiation, ion-induced inter-diffusion/inter-mixing of Hf and Ga elements has been observed which leads to the development of inter-mixing of layers at the interfaces. As deposited films have randomly oriented large, inhomogeneous and non-uniform grains with an average size of 34.5 nm, while at the highest fluence, the formation of homogeneous and uniform individual spherical grains with an average size of 13.8 nm has been observed. Furthermore, HfO2/GaOx/Si-based MOS capacitors have been fabricated and the consequent effects on the electrical properties of these devices have been discussed in detail.
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    150 MeV Au ion induced modification of Si nanoparticles prepared by laser ablation
    ( 2014-08-15) Saikiran, V. ; Vendamani, V. S. ; Hamad, S. ; Nageswara Rao, S. V.S. ; Venugopal Rao, S. ; Pathak, A. P.
    We have investigated in detail the effects of 150 MeV Au ions irradiation on Si nanoparticles (NPs) synthesized by picosecond laser ablation of single crystal Si wafers in acetone. The formation of Si NPs was confirmed by Raman spectroscopy, transmission electron microscopy (TEM) and field emission scanning electron microscope (FESEM) measurements. The size distribution of synthesized NPs was found to be in the range of few nm to 80 nm. These samples were then irradiated with 150 MeV Au ions at various fluences ranging from 1 × 1013 to 1 × 1014 ions/cm2. The effects of ion irradiation on the size and shape of Si NPs were further investigated using TEM, FESEM and micro Raman spectroscopy. From TEM data, we have noticed the reduction in size of NPs with increasing ion irradiation fluence. Furthermore with the increasing fluence we also observed the nucleation of 6-9 nm NPs in the vicinity of bigger NPs where there were no such NPs before ion irradiation. The increase in the FWHM of the Raman peak and its shift towards lower wave number side also suggests that the decrease in NP size is a result of increase in the fluence of irradiation. © 2014 Elsevier B.V. All rights reserved.
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    200 MeV Ag ion irradiation mediated green synthesis and self assembly of silver nanoparticles into dendrites for enhanced SERS applications
    ( 2022-04-01) Sherpa, Laden ; Arun, Nimmala ; Nageswara Rao, S. V.S. ; Khan, S. A. ; Pathak, A. P. ; Tripathi, Ajay ; Tiwari, Archana
    In this paper, we report green and controlled synthesis of silver nanoparticles in water with spherical, hetrogeneously shaped and extended chain like networks using pristine Bergenia ciliata root extracts and the extracts irradiated with Ag15+ swift heavy ion irradiation. The ion fluence on the thin layer of extract modifies the phytomolecules responsible for the reduction and capping of the silver ion and thus changing the morphologies and sizes of the resultant nanoparticles. In addition, the irradiation assists the nanoparticles to agglomerate via surface oxidation providing a core for the growth of dendritic assemblies. Optical, crystallographic and morphological studies reveal surface oxidation of silver nanoparticles is enhanced upon the irradiation of the phytomolecules due to which the surface chemistry of the nanoparticles changes. In addition, these silver nanoparticles and their dendritic assembly exhibit high SERS enhancement factors for methylene blue analyte. The effects of irradiation promote the dendritic assemblies, roughened surfaces over the nanoparticle clusters and hence offer higher enhancement factors as compared to those which have been synthesized using pristine plant extracts.
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    A comparative study of laser- and electric-field-induced effects on the crystallinity, surface morphology and plasmon resonance of indium and gold thin films
    ( 2010-04-01) Kumar, Prashant ; Krishna, M. Ghanashyam
    The effects of post-deposition treatment of In and Au thin films by excimer laser and electric field are reported. The films were subjected to an electric field in the range of 0.1-3.3 kV/cm and laser irradiation in the range from 0.01 to 0.1 J/cm 2. The effect of this treatment on the morphology and crystallinity of indium and gold thin films (10-100 nm thickness) is investigated. Indium films exhibited a three-fold grain growth at an electric field of 3.3 kV/cm. Gold thin film, on the other hand, showed significant grain growthatamuch lowerfieldof 0.6 kV/cm. The as-deposited thin films of indium and gold were amorphous but turned nanocrystalline with average crystallite sizes of 57 nm at 3.33 kV/cm and 35nm at 0.66 kV/cm, respectively. When indium thin films were laser irradiated, flat disc-shaped grains for as-deposited thin films were transformed to spherical grains at a laser fluence of 0.02 J/cm 2 and cubical grains at 0.05 J/cm 2. At 0.05 J/cm 2, as-deposited amorphous indium and gold thin films turned nanocrystalline with crystallite sizes of 50 nm and 10 nm, respectively. Significantly, laser treatment causes the grain-size distribution to become narrower with a shift in mean size to larger values. Electric-field treatment on the other hand leads to a shifting of the mean grain size to larger values without affecting the distribution. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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    A fast chaotic block cipher for image encryption
    ( 2014-03-01) Armand Eyebe Fouda, J. S. ; Yves Effa, J. ; Sabat, Samrat L. ; Ali, Maaruf
    Image encryption schemes based on chaos usually involve real number arithmetic operations to generate the chaotic orbits from the chaotic system. These operations are time-consuming and are normally performed with high-end processors. To overcome this drawback, this paper proposes a one round encryption scheme for the fast generation of large permutation and diffusion keys based on the sorting of the solutions of the Linear Diophantine Equation (LDE) whose coefficients are integers and dynamically generated from any type of chaotic systems. The high security and low computational complexity are achieved not only by using large permutation based on the sorting of the solutions of LDE but also by generating only one permutation from the sorting of the solutions of the LDE, then by dynamically updating d number of integers (d > 2) in the permutation. The performance of the proposed scheme is evaluated using various types of analysis such as entropy analysis, difference analysis, statistical analysis, key sensitivity analysis, key space analysis and speed analysis. The experimental results indicate that the proposed algorithm is secure and fast as compared to the two round encryption scheme. © 2013 Elsevier B.V.
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    A heuristic to maximize network lifetime for target coverage problem in wireless sensor networks
    ( 2011-12-01) Mini, S. ; Udgata, Siba K. ; Sabat, Samrat L.
    Devices in a wireless sensor network are resource constrained. Energy, an exiguous resource of sensor nodes, should be used in an efficient manner to prolong the network lifetime. It is not a feasible approach to turn all sensor nodes on at the same time, which will curtail the overall network lifetime. In this paper, we propose an energy efficient scheme that maximizes the network lifetime for k-coverage and Q-coverage problem. The sensors are divided into sensor covers, such that each cover monitors all targets. The covers are formed based on the order of weight-based-priority. The sensor cover changes dynamically with change in weight. Weight of a sensor node is calculated based on the weight due to the targets it cover and the remaining battery power of the node. Experimental results reveal that optimal results can be obtained by adaptively tuning the weight-deciding component. © 2011 Old City Publishing, Inc.
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    A high capacity MnFe < inf > 2 < /inf > O < inf > 4 < /inf > /rGO nanocomposite for Li and Na-ion battery applications
    ( 2015-01-01) Kollu, Pratap ; Kumar, P. Ramesh ; Santosh, Chella ; Kim, Do Kyung ; Grace, Andrews Nirmala
    A porous MnFe2O4/reduced graphene oxide (rGO) nanocomposite with high storage capacity was prepared by a hydrothermal method. The MnFe2O4/rGO nanocomposite sample was characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and high resolution transmission electron microscopy. The electrochemical characteristics with lithium as well as sodium were studied using cyclic voltammetry and a battery cycle tester. In this work, apart from the lithium storage, the sodium storage ability of the spinel type MnFe2O4 as an anode is demonstrated for the first time. The prepared MnFe2O4/rGO composite with sodium alginate binder shows a highly stable capacity of 905 mA h g-1versus Li/Li+ and 258 mA h g-1versus Na/Na+ at 0.1C rate. The enhancement in capacity and excellent cycleability of the MnFe2O4/reduce graphene oxide nanocomposite is due to constrained volume expansion during conversion reactions and enhancement of electrical conductivity.
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    A Highly Tunable Barium Strontium Titanate Thin Film MIM Varactor with Floating Metal
    ( 2021-12-01) Nath, Surajit Kumar ; Goud, J. Pundareekam ; Kongbrailatpam, Sandeep Sharma ; Rajaram, Guruswamy ; Raju, K. C.James
    A ferroelectric metal insulator metal (MIM) varactor structure incorporating a floating metal and coplanar waveguide (CPW) has been introduced here. The work of the proposed varactor is based on the field-dependent material properties of (Ba, Sr) TiO3 (BST) thin film. A capacitance tunability of 44% has been achieved for the bias voltage of 0-10 V over a frequency range of 1-3 GHz. The proposed varactor structure yields a compact area, high capacitance density, and reduced mask process (two masks).
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    A measurement of the Higgs boson mass in the diphoton decay channel
    ( 2020-06-10) Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Ambrogi, F. ; Bergauer, T. ; Dragicevic, M. ; Erö, J. ; Escalante Del Valle, A. ; Flechl, M. ; Frühwirth, R. ; Jeitler, M. ; Krammer, N. ; Krätschmer, I. ; Liko, D. ; Madlener, T. ; Mikulec, I. ; Rad, N. ; Schieck, J. ; Schöfbeck, R. ; Spanring, M. ; Waltenberger, W. ; Wulz, C. E. ; Zarucki, M. ; Drugakov, V. ; Mossolov, V. ; Suarez Gonzalez, J. ; Darwish, M. R. ; De Wolf, E. A. ; Di Croce, D. ; Janssen, X. ; Lelek, A. ; Pieters, M. ; Rejeb Sfar, H. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Putte, S. ; Van Remortel, N. ; Blekman, F. ; Bols, E. S. ; Chhibra, S. S. ; D'Hondt, J. ; De Clercq, J. ; Lontkovskyi, D. ; Lowette, S. ; Marchesini, I. ; Moortgat, S. ; Python, Q. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Beghin, D. ; Bilin, B. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Dorney, B. ; Favart, L. ; Grebenyuk, A. ; Kalsi, A. K. ; Moureaux, L. ; Popov, A. ; Postiau, N. ; Starling, E. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Vannerom, D. ; Cornelis, T. ; Dobur, D. ; Khvastunov, I. ; Niedziela, M. ; Roskas, C. ; Skovpen, K. ; Tytgat, M. ; Verbeke, W. ; Vermassen, B. ; Vit, M. ; Bondu, O. ; Bruno, G. ; Caputo, C. ; David, P. ; Delaere, C. ; Delcourt, M. ; Giammanco, A. ; Lemaitre, V. ; Prisciandaro, J. ; Saggio, A. ; Vidal Marono, M. ; Vischia, P. ; Zobec, J. ; Alves, G. A. ; Correia Silva, G. ; Hensel, C. ; Moraes, A. ; Belchior Batista Das Chagas, E. ; Carvalho, W. ; Chinellato, J. ; Coelho, E. ; Da Costa, E. M. ; Da Silveira, G. G.
    A measurement of the mass of the Higgs boson in the diphoton decay channel is presented. This analysis is based on 35.9fb−1 of proton-proton collision data collected during the 2016 LHC running period, with the CMS detector at a centre-of-mass energy of 13 TeV. A refined detector calibration and new analysis techniques have been used to improve the precision of this measurement. The Higgs boson mass is measured to be mH=125.78±0.26GeV. This is combined with a measurement of mH already performed in the H→ZZ→4ℓ decay channel using the same data set, giving mH=125.46±0.16GeV. This result, when further combined with an earlier measurement of mH using data collected in 2011 and 2012 with the CMS detector, gives a value for the Higgs boson mass of mH=125.38±0.14GeV. This is currently the most precise measurement of the mass of the Higgs boson.
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    A modified 0-1 test for chaos detection in oversampled time series observations
    ( 2014-01-01) Armand Eyebe Fouda, J. S. ; Bodo, Bertrand ; Sabat, Samrat L. ; Effa, J. Yves
    The use of binary 0-1 test for chaos detection is limited to detect chaos in oversampled time series observations. In this paper we propose a modified 0-1 test in which, binary 0-1 test is applied to the discrete map of local maxima and minima of the original observable in contrast to the direct observable. The proposed approach successfully detects chaos in oversampled time series data. This is verified by simulating different numerical simulations of Lorenz and Duffing systems. The simulation results show the efficiency and computational gain of the proposed test for chaos detection in the continuous time dynamical systems. © 2014 World Scientific Publishing Company.
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    A modified Sage-Husa adaptive Kalman filter for denoising Fiber Optic Gyroscope signal
    ( 2012-12-01) Narasimhappa, Mundla ; Rangababu, P. ; Sabat, Samrat L. ; Nayak, J.
    Fiber Optic Gyroscope (FOG) is a key component in Inertial Navigation System. The performance of FOG degrades due to different types of random errors in the measured signal. Although Kalman filter and its variants like Sage-Husa Kalman filters are being used to denoise the Gyroscope signal the performance of Kalman filter is limited by the initial values of measurement and process noise covariance matrix, and transition matrix. To address this problem, this paper uses modified Sage-Husa adaptive Kalman filter to denoise the FOG signal. In this work, the random error of fiber optic gyroscope is modeled using a first order auto regressive (AR) model and used the coefficients of the model to initialize the transition matrix of Sage-Husa Adaptive Kalman filter. Allan variance analysis is used to quantify the random errors of the measured and denoised signal. The performance of proposed algorithm is compared with conventional Kalman filter and the simulation results show that the modified Sage-Husa adaptive Kalman filter (SHAKF) algorithm outperforms the conventional Kalman filter technique while denoising FOG signal. © 2012 IEEE.
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    A multi-dimensional search for new heavy resonances decaying to boosted WW , WZ , or ZZ boson pairs in the dijet final state at 13 Te
    ( 2020-03-01) Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Ambrogi, F. ; Bergauer, T. ; Brandstetter, J. ; Dragicevic, M. ; Erö, J. ; Del Valle, A. Escalante ; Flechl, M. ; Frühwirth, R. ; Jeitler, M. ; Krammer, N. ; Krätschmer, I. ; Liko, D. ; Madlener, T. ; Mikulec, I. ; Rad, N. ; Schieck, J. ; Schöfbeck, R. ; Spanring, M. ; Spitzbart, D. ; Waltenberger, W. ; Wulz, C. E. ; Zarucki, M. ; Drugakov, V. ; Mossolov, V. ; Gonzalez, J. Suarez ; Darwish, M. R. ; De Wolf, E. A. ; Di Croce, D. ; Janssen, X. ; Lauwers, J. ; Lelek, A. ; Pieters, M. ; Sfar, H. Rejeb ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Putte, S. ; Van Remortel, N. ; Blekman, F. ; Bols, E. S. ; Chhibra, S. S. ; D’Hondt, J. ; De Clercq, J. ; Lontkovskyi, D. ; Lowette, S. ; Marchesini, I. ; Moortgat, S. ; Moreels, L. ; Python, Q. ; Skovpen, K. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Parijs, I. ; Beghin, D. ; Bilin, B. ; Brun, H. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Dorney, B. ; Favart, L. ; Grebenyuk, A. ; Kalsi, A. K. ; Luetic, J. ; Popov, A. ; Postiau, N. ; Starling, E. ; Thomas, L. ; Velde, C. Vander ; Vanlaer, P. ; Vannerom, D. ; Cornelis, T. ; Dobur, D. ; Khvastunov, I. ; Niedziela, M. ; Roskas, C. ; Trocino, D. ; Tytgat, M. ; Verbeke, W. ; Vermassen, B. ; Vit, M. ; Zaganidis, N. ; Bondu, O. ; Bruno, G. ; Caputo, C. ; David, P. ; Delaere, C. ; Delcourt, M. ; Giammanco, A. ; Lemaitre, V. ; Magitteri, A. ; Prisciandaro, J. ; Saggio, A. ; Marono, M. Vidal ; Vischia, P. ; Zobec, J. ; Alves, F. L.
    A search in an all-jet final state for new massive resonances decaying to WW, WZ, or ZZ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 fb-1 recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 Te. The search is focussed on potential narrow-width resonances with masses above 1.2 Te, where the decay products of each W or Z boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed above the estimated standard model background. In a heavy vector triplet model, spin-1 Z ′ and W ′ resonances with masses below 3.5 and 3.8 Te, respectively, are excluded at 95% confidence level. In a bulk graviton model, upper limits on cross sections are set between 27 and 0.2 fb for resonance masses between 1.2 and 5.2 Te, respectively. The limits presented in this paper are the best to date in the dijet final state.
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    A multiplierless hyperchaotic system using coupled Duffing oscillators
    ( 2015-01-01) Eyebe Fouda, J. S.Armand ; Sabat, Samrat L.
    We present a 4-dimensional electrical model for realizing a multiplierless hyperchaotic system using two Duffing oscillators with a nonlinear resistive coupling. The corresponding hyperchaotic attractor is not only numerically verified through investigating phase portraits and Lyapunov exponents spectra, but also realized experimentally by a simple electronic circuit. © 2014 Elsevier B.V.
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    A new Boson with a mass of 125 GeV observed with the CMS experiment at the large hadron collider
    ( 2012-12-21) Chatrchyan, S. ; Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Aguilo, E. ; Bergauer, T. ; Dragicevic, M. ; Erö, J. ; Fabjan, C. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hoch, M. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Kiesenhofer, W. ; Knünz, V. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Majerotto, W. ; Mikulec, I. ; Pernicka, M. ; Rahbaran, B. ; Rohringer, C. ; Rohringer, H. ; Schöfbeck, R. ; Strauss, J. ; Szoncsó, F. ; Taurok, A. ; Waltenberger, W. ; Walzel, G. ; Widl, E. ; Wulz, C. E. ; Chekhovsky, V. ; Emeliantchik, I. ; Litomin, A. ; Makarenko, V. ; Mossolov, V. ; Shumeiko, N. ; Solin, A. ; Stefanovitch, R. ; Suarez Gonzalez, J. ; Fedorov, A. ; Korzhik, M. ; Missevitch, O. ; Zuyeuski, R. ; Bansal, M. ; Bansal, S. ; Beaumont, W. ; Cornelis, T. ; De Wolf, E. A. ; Druzhkin, D. ; Janssen, X. ; Luyckx, S. ; Mucibello, L. ; Ochesanu, S. ; Roland, B. ; Rougny, R. ; Selvaggi, M. ; Staykova, Z. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Van Spilbeeck, A. ; Blekman, F. ; Blyweert, S. ; D'Hondt, J. ; Devroede, O. ; Gonzalez Suarez, R. ; Goorens, R. ; Kalogeropoulos, A. ; Maes, M. ; Olbrechts, A. ; Tavernier, S. ; Van Doninck, W. ; Van Lancker, L. ; Van Mulders, P. ; Van Onsem, G. P. ; Villella, I. ; Clerbaux, B. ; De Lentdecker, G. ; Dero, V. ; Dewulf, J. P. ; Gay, A. P.R. ; Hreus, T. ; Léonard, A. ; Marage, P. E. ; Mohammadi, A. ; Reis, T. ; Rugovac, S. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Wang, J. ; Wickens, J. ; Adler, V. ; Beernaert, K.
    The Higgs boson was postulated nearly five decades ago within the framework of the standard model of particle physics and has been the subject of numerous searches at accelerators around the world. Its discovery would verify the existence of a complex scalar field thought to give mass to three of the carriers of the electroweak force-the W+, W-, and Z 0 bosons-as well as to the fundamental quarks and leptons. The CMS Collaboration has observed, with a statistical significance of five standard deviations, a new particle produced in proton-proton collisions at the Large Hadron Collider at CERN. The evidence is strongest in the diphoton and four-lepton (electrons and/or muons) final states, which provide the best mass resolution in the CMS detector. The probability of the observed signal being due to a random fluctuation of the background is about 1 in 3 x 106. The new particle is a boson with spin not equal to 1 and has a mass of about 1.25 giga-electron volts. Although its measured properties are, within the uncertainties of the present data, consistent with those expected of the Higgs boson, more data are needed to elucidate the precise nature of the new particle.
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    A novel architecture for intelligent and adaptive wireless sensor network based alarming system
    ( 2009-12-01) Udgata, Siba K. ; Sindhura, G. ; Sabat, Samrat L.
    Wireless Sensor Networks (WSN) play very important role in information and communication Technology (ICT) and have attracted a lot of attention lately. The importance of these networks are increasing exponentially due to its usage in monitoring wide variety of applications. In this paper, we propose a novel architecture for intelligent alarm generation in a wireless sensor zone. We developed a decision support system for continuous monitoring the logged data for quality assurance across the zone, to raise alerts in terms of mail or message or alarm following any violation in the safety norm in an intelligent and adaptive manner. We implemented the system, by creating a Wireless Sensor Network Zone using Crossbow Imote2 sensor nodes. The standard Zigbee 802.15.4 protocol is used for communication. Our prototype system generates alerts in terms of SMS to predefined and authenticated mobile number(s) following detection of alarm in terms of fire, light, object movement and pH, Temperature, Salinity, Dissolved Oxygen of drinking water. ©2009 IEEE.
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    A novel CuO–N-doped graphene nanocomposite-based hybrid electrode for the electrochemical detection of glucose
    ( 2017-10-01) Felix, Sathiyanathan ; Kollu, Pratap ; Jeong, Soon Kwan ; Grace, Andrews Nirmala
    We report a catalyst of N-doped graphene CuO nanocomposite, for the non-enzymatic electrocatalytic oxidation of glucose. The hybrid nanocomposite was synthesized by copper sulfate, cetyl ammonium bromide and graphite as starting materials. The synthesized composites were characterized with the techniques like X-ray diffraction, field emission scanning electron microscopy, transmission electron microscope to study the crystalline phase and morphological structure. Based on this composite, a non-enzymatic glucose sensor was constructed. Cyclic voltammetry and chronoamperometry methods were done to investigate the electrocatalytic properties of glucose in alkaline medium. For glucose detection, the fabricated sensor showed a linear response over a wide range of concentration from 3 to 1000 µM, with sensitivity of 2365.7 µA mM−1 cm−2 and a fast response time of 5 s. The designed sensor exhibited negligible current response to the normal concentration of common interferents in the presence of glucose. All these favorable advantages of the fabricated glucose sensor suggest that it may have good potential application in biological samples, food and other related areas.
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    A novel electron beam evaporation technique for the deposition of superconducting thin films
    ( 1991-05-01) Krishna, M. G. ; Muralidhar, G. K. ; Rao, K. N. ; Rao, G. M. ; Mohan, S.
    Superconducting thin films of BiSrCaCuO have been deposited using a novel electron beam evaporation technique. In this technique the crucible has a groove around its circumference and rotates continuously during deposition. The source material is loaded in the form of pellets of the composite. Both oxides as well as flourides have been used in the starting material and a comparison of the film properties has been made. The best film was obtained on a MgO(100) substrate with a Tc onset at 85 K and Tc zero at 77 K using calcium flouride in the source material. © 1991.
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    A review of ion beam assisted deposition of optical thin films
    ( 1995-01-01) Mohan, S. ; Krishna, M. Ghanashyam
    A review of the current status of ion assisted deposition of optical thin films is presented. The different kinds of ion sources and their relative merits and demerits are discussed. This is followed by a discussion of the various theoretical models currently in use to explain ion-surface interactions in such a process and finally the properties of oxide thin films deposited using ion assisted deposition are discussed. © 1995.
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    A robust diffusion algorithm using logarithmic hyperbolic cosine cost function for channel estimation in wireless sensor network under impulsive noise environment
    ( 2022-04-30) Mishra, Bishnu Prasad ; Panigrahi, Trilochan ; Wilson, Annet Mary ; Sabat, Samrat L.
    In a wireless sensor network (WSN), the performance of the error-squared based adaptive channel estimation algorithm degrades in the presence of impulsive noise. Robust methods are used to minimize the impulsive noise impact at the cost of a slow convergence rate. We propose a robust diffusion adaptive channel estimation algorithm using the logarithmic hyperbolic cosine cost function assuming that the received signal at each node is corrupted by impulsive noise. The sensor nodes experiencing the common channel with the base station are grouped using their initial channel estimates. After grouping, the robust diffusion algorithm is applied in each group to estimate the corresponding channel. The steady-state mean square deviation (MSD) and excess mean square error (EMSE) of the robust algorithm are derived. The algorithm's steady-state and convergence rate performance are simulated for Rayleigh fading channel corrupted by Bernoulli-Gaussian distributed impulsive noise. The simulation results demonstrate that the proposed algorithm gives faster convergence without compromising steady-state performance compared to other robust algorithms.