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Wyszukujesz frazę "Kavitha, S." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    A New Approach of an Error Detecting and Correcting Circuit by Arithmetic Logic Blocks
    Autorzy:
    Kavitha, S.
    Hashim, Fazida Hanim
    Kamal, Noorfazila
    Powiązania:
    https://bibliotekanauki.pl/articles/226549.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    EDAC
    ALU
    speed
    block reduction
    power
    slew rate
    Opis:
    This paper proposes a unique method of an error detection and correction (EDAC) circuit, carried out using arithmetic logic blocks. The modified logic blocks circuit and its auxiliary components are designed with Boolean and block reduction technique, which reduced one logic gate per block. The reduced logic circuits were simulated and designed using MATLAB Simulink, DSCH 2 CAD, and Microwind CAD tools. The modified, 2:1 multiplexer, demultiplexer, comparator, 1-bit adder, ALU, and error correction and detection circuit were simulated using MATLAB and Microwind. The EDAC circuit operates at a speed of 454.676 MHz and a slew rate of -2.00 which indicates excellence in high speed and low-area.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 2; 313-318
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A New Approach to Spindle Radial Error Evaluation Using a Machine Vision System
    Autorzy:
    Kavitha, C.
    Ashok, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/220748.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    machine vision
    circular hough transform
    Fourier series
    runout
    spindle radial error
    Opis:
    The spindle rotational accuracy is one of the important issues in a machine tool which affects the surface topography and dimensional accuracy of a workpiece. This paper presents a machine-vision-based approach to radial error measurement of a lathe spindle using a CMOS camera and a PC-based image processing system. In the present work, a precisely machined cylindrical master is mounted on the spindle as a datum surface and variations of its position are captured using the camera for evaluating runout of the spindle. The Circular Hough Transform (CHT) is used to detect variations of the centre position of the master cylinder during spindle rotation at subpixel level from a sequence of images. Radial error values of the spindle are evaluated using the Fourier series analysis of the centre position of the master cylinder calculated with the least squares curve fitting technique. The experiments have been carried out on a lathe at different operating speeds and the spindle radial error estimation results are presented. The proposed method provides a simpler approach to on-machine estimation of the spindle radial error in machine tools.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 1; 201-219
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectrophotometric determination of copper as copper Piperazine
    Autorzy:
    Kavitha, Ch.
    Babu, M. S.
    Saraswathi, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/412355.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    spectophotometry
    Cu(II)
    piperazine
    Opis:
    Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes of piperazine in aqueous solutions are not reported so far and this is the first attempt in this area of spectrophotometric analysis.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 8, 3; 205-209
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green Synthesis of Copper Nanoparticles Using Ocimum sanctum L. (Tulsi) and Piper nigrum L. (Pepper Seed) for Pollution Free Environment
    Autorzy:
    Nirmala, M.
    Kavitha, B.
    Nasreen, S.
    Kiruthika, S.
    Divya, B.
    Manochitra, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031782.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Copper
    Copper nano particles
    Cu
    Diffraction
    Green synthesis
    Ocimum sanctum
    Pepper
    Piper nigrum
    Tulsi
    Opis:
    Synthesis of nanoparticles using plant leaf extract is an eco-friendly, non-toxic and cost efficient approach in the field of nanotechnology. In this study, biosynthesis of stable copper nanoparticles were prepared by using Ocimum sanctum and Piper nigrum extract. These biosynthesized Cu nanoparticles were characterized with the help of X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR). The crystalline size of the Copper Nanoparticles prepared from Tulsi extract is little smaller than Copper nanoparticles prepared from Pepper extract. SEM images of Copper nanoparticles showed that the cluster formation, presence of smaller and larger grains. FTIR analysis revealed that the functional groups present in the Copper nanoparticles prepared from both Tulsi and Pepper extracts. Thus, this method can be used for rapid and ecofriendly biosynthesis of stable copper nanoparticles and can be used for catalytic agent, anti-microbial, anti-fungal, anti-biotic, nanosensor, super conducting material, solar cell applications.
    Źródło:
    World Scientific News; 2020, 150; 105-117
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Dye Sensitized Solar Cell Based on Natural Photosensitizers
    Autorzy:
    Nirmala, M.
    Sahana, S.
    Iswarya, B.
    Maruvarasi, K.
    Jenita, A. Adline
    Kavitha, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031877.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Efficiency
    FTIR spectroscopy
    Functional
    Natural Dyes
    Solar cell
    nanocrystalline materials
    nanocrytalline titanium dioxide
    Opis:
    Dye Sensitized solar cells were fabricated using with natural extracts and TiO2 is used as a semiconducting layer. The layer of nanocrytalline titanium dioxide was deposited on conductive side of the transparent Fluorine doped Tin Oxide (FTO) glass plate and the other side of the plate is coated with graphite. Voltage and Current values are measured for natural dyes coated FTO plate and I-V characteristic curves of all fabricated cells were drawn and analyzed. The highest power conversion efficiencies of Blueberry (0.79872%) and Beetroot (0.745813 %.) dyes were achieved among 10 dyes. The functional groups of Beetroot and Turmeric natural dyes were confirmed under FTIR spectroscopy. The ease and cost efficiency of the overall fabrication process, extensive availability of these fruits/juices render them novel and low-cost candidates for Solar cell applications.
    Źródło:
    World Scientific News; 2020, 149; 128-139
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zinc oxide nanoparticles as photo-catalytic and anti-bacterial pigment for alkyd resin based coating
    Autorzy:
    Kavitha Sri, A.
    Sivaraj, M.
    Rajkumar, S.
    Ruby Shelin, A.
    Sajitha, L.P.
    Jeyasubramanian, K.
    Jeen Robert, R.B.
    Hikku, G.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200597.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    ZnO NPs
    photocatalytic pigment
    anti-bacterial pigment
    alkyd resin coating
    self-cleaning surface
    pigment fotokatalityczny
    pigment antybakteryjny
    powłoka z żywicy alkidowej
    powierzchnia samoczyszcząca
    Opis:
    Purpose: Recently, there has been an upsurge among people around the world in maintaining a sustainable and hygienic environment. This is due to the over-exploitation of recourses causing environmental pollution and spreading bacterial infections. In this regard, scientists are motivated to develop smart coatings where environmental pollutants and bacterial cells are degraded when in contact with their surfaces. Design/methodology/approach: In our previous report, ZnO nanoparticles (NPs) were prepared using the precipitation technique, showing good photocatalytic and antibacterial activity [1]. In this context, the present study details the use of ZnO NPs as pigment for the fabrication of alkyd resin-based self-cleaning coating. The coating was developed by mixing ZnO NPs and alkyd resin along with the additives using the ball milling technique. The developed coating was characterized using field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, atomic force microscopy, and water contact angle measurements. Findings: To elucidate the self-cleaning and hygienic behaviour of the ZnO/alkyd resin coating, the dried coating was exposed to crystal violet (CV) solution as a model dye pollutant and bacterial strains to assess its photocatalytic and antibacterial activity. The droplets of CV solution placed over the coating almost degraded after 360 min of exposure to sunlight owing to the presence of ZnO NPs in the coating. Further, the coating exhibits reasonable antibacterial activity against E. coli and P. aeruginosa whereas it displays low antibacterial activity against S. aureus. Research limitations/implications: Even though, the self-cleaning coating shows promising results, tuning the activity of the photo-catalytic pigment can improve the pollutant degradation efficiency and elevate bactericidal activity. Originality/value: ZnO NPs-impregnated alkyd resin coating for self-cleaning applications is novel.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 118, 1; 29--35
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydroponics agriculture as a modern agriculture technique
    Autorzy:
    Monisha, K.
    Kalai Selvi, H.
    Sivanandhini, P.
    Sona Nachammai, A.
    Anuradha, C. T.
    Rama Devi, S.
    Kavitha Sri, A.
    Neya, N. R.
    Vaitheeswari, M.
    Hikku, G. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200644.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    hydroponics
    agriculture
    hoagland solution
    macronutrients
    micronutrients
    types of hydroponic system
    hydroponika
    rolnictwo
    makroskładniki
    mikroskładniki
    Opis:
    Purpose Hydroponics, also known as controlled environment agriculture, is a method of cultivating plants and herbs without soil using mineral-supplemented solutions. Agriculture biotechnology enhances its wings on developing genetically modified plants for expanding crop yield and introducing characteristic features such as growing seasonal crops throughout the year, weather-resistant, and pest resistance. Compared to traditional agriculture, hydroponic cultivation yields high-quality crops with 90% more efficient use of water. Therefore, hydroponic cultivation could be considered a succeeding future of agriculture. In this context, understanding agriculture through the hydroponic route is vital for the efficient cultivation of crops. This review elaborates on the different classes of hydroponic systems and the factors that enable the systematic elements of the frame-up. Design/methodology/approach The significant intent of this review is to provide information on distinct hydroponic systems. Findings The present review reports a comprehensive discussion about the significance of the hydroponics system, its mechanism, nutrient solution preparation, types of hydroponic setup, and the challenges faced and would light up the knowledge in the same. Originality/value This review focus on the current feasible hydroponic method of crop cultivation.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2023, 116, 1; 25--35
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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