• Title/Summary/Keyword: Indian society

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High Sensitive Fiber Optic Temperature Sensor Based on a Side-polished Single-mode Fiber Coupled to a Tapered Multimode Overlay Waveguide

  • Prerana, Prerana;Varshney, Ravendra Kumar;Pal, Bishnu Pada;Nagaraju, Bezwada
    • Journal of the Optical Society of Korea
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    • v.14 no.4
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    • pp.337-341
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    • 2010

  • A high sensitivity fiber optic temperature sensor based on a side-polished fiber (SPF) coupled to a tapered multimode overlay waveguide (MMOW) is proposed and studied. Both tapered and non-tapered MMOW were considered to study the effect of tapering of MMOW on the characteristics of the device and to investigate the criticality of the uniformity of the multimode overlay waveguide over the SPF. Present study shows that tapering of the MMOW can be used to tune the desired wavelength range without any loss in the sensitivity. Sensitivity up to 9 nm/$^{\circ}C$ within the temperature range of 25 to $100^{\circ}C$ can be achieved with the proposed sensor, almost 6 times higher compared even to state-of-the-art high-sensitivity grating-based fiber optic temperature sensors.

  • https://doi.org/10.3807/JOSK.2010.14.4.337 인용 PDF KSCI

CYCLIC CODES FROM THE FIRST CLASS TWO-PRIME WHITEMAN'S GENERALIZED CYCLOTOMIC SEQUENCE WITH ORDER 6

  • Kewat, Pramod Kumar;Kumari, Priti
    • Bulletin of the Korean Mathematical Society
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    • v.56 no.2
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    • pp.285-301
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    • 2019

  • Let $p_1$ and $p_2$ be two distinct odd primes with gcd($p_1-1$, $p_2-1$) = 6. In this paper, we compute the linear complexity of the first class two-prime Whiteman's generalized cyclotomic sequence (WGCS-I) of order d = 6. Our results show that their linear complexity is quite good. So, the sequence can be used in many domains such as cryptography and coding theory. This article enrich a method to construct several classes of cyclic codes over GF(q) with length $n=p_1p_2$ using the two-prime WGCS-I of order 6. We also obtain the lower bounds on the minimum distance of these cyclic codes.

  • https://doi.org/10.4134/BKMS.b170594 인용 PDF KSCI

A Comparison of Electrical Stimulation for Electrodic and EDTA-Enhanced Phytoremediation of Lead using Indian Mustard (Brassica juncea)

  • Lim, Jae-Min;Jin, Biao;Butcher, David J.
    • Bulletin of the Korean Chemical Society
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    • v.33 no.8
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    • pp.2737-2740
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    • 2012

  • The use of plants to remove toxic metals from soil (phytoremediation) is emerging as a cost-effective alternative to conventional methods for the removal of heavy metals from contaminated soil. Indian mustard (Brassica juncea) was used as the plant to accumulate high tissue concentrations of lead when grown in contaminated soil. For this study, the application of an electric field combined effectively with EDTA-enhanced phytoremediation. A stimulation of direct and alternating electric potential was compared and EDTA-enhanced phytoremediation of lead using Indian mustard has been performed. The effects of experimental parameters such as operating voltage with different concentration of EDTA, the number of graphite electrodes, and cultivation period on the removal of toxic metal were studied. Shoot lead accumulations in Indian mustard increased as the concentration of EDTA and dc electric potential was increased. Two to four folds was increased when EDTA plus a dc electric potential was applied, compared to an ac electric potential. The maximum lead accumulation in the shoots was achieved by applying EDTA plus dc electric potential with 6 graphite electrodes.

  • https://doi.org/10.5012/bkcs.2012.33.8.2737 인용 PDF KSCI

A Simulation Tool for Ultrasonic Inspection

  • Krishnamurthy, Adarsh;Mohan, K.V.;Karthikeyan, Soumya;Krishnamurthy, C.V.;Balasubramaniam, Krishnan
    • Journal of the Korean Society for Nondestructive Testing
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    • v.26 no.3
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    • pp.153-161
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    • 2006

  • A simulation program SIMULTSONIC is under development at CNDE to help determine and/or help optimize ultrasonic probe locations for inspection of complex components. SIMULTSONIC provides a ray-trace based assessment for immersion and contact modes of inspection. The code written in Visual C++ operating in Microsoft Windows environment provides an interactive user interface. In this paper, a description of the various features of SIMULTSONIC is given followed by examples illustrating the capability of SIMULTSONIC to deal with inspection of canonical objects such as pipes. In particular, the use of SIMULTSONIC in the inspection of very thin-walled pipes (with 450 urn wall thickness) is described. Ray trace based assessment was done using SIMULTSONIC to determine the standoff distance and the angle of oblique incidence for an immersion mode focused transducer. A 3-cycle Hanning window pulse was chosen for simulations. Experiments were carried out to validate the simulations. The A-scans and the associated B-Scan images obtained through simulations show good correlation with experimental results, both with the arrival time of the signal as well as with the signal amplitudes.

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