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

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Photoionization of He - a Field Theoretic Approach
    Autorzy:
    Bhattacharyya, S.
    Mitra, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2028891.pdf
    Data publikacji:
    2001-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.80.Cy
    32.80.Fb
    Opis:
    The present paper deals with the field theoretic study of single ionization cross-sectionsσ$\text{}_{ph}$ and σ$\text{}_{C}$ of helium due to photoelectric effect and the Compton scattering, respectively, by photons of energy lying between 0-12 keV. In this energy range,σ$\text{}_{ph}$ gradually decreases with energy whileσ$\text{}_{C}$ gradually increases. There is a crossover point around 6.5 keV where σ$\text{}_{ph}$=σ$\text{}_{C}$=10$\text{}^{-24}$ cm$\text{}^{2}$. Near about this crossover point σ$\text{}_{ph}$ andσ$\text{}_{C}$ curves are like mirror images. The ratio σ$\text{}_{C}$/σ$\text{}_{ph}$ lies between 0.3 to 1.5 in the energy range under consideration. The present results are compared with existing theoretical results.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 4; 505-516
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An extension of a theorem of Marcinkiewicz and Zygmund on differentiability
    Autorzy:
    Mukhopadhyay, S.
    Mitra, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205473.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    Let f be a measurable function such that $Δ_k(x,h;f) = O(|h|^λ)$ at each point x of a set E, where k is a positive integer, λ > 0 and $Δ_k(x,h;f)$ is the symmetric difference of f at x of order k. Marcinkiewicz and Zygmund [5] proved that if λ = k and if E is measurable then the Peano derivative $f_{(k)}$ exists a.e. on E. Here we prove that if λ > k-1 then the Peano derivative $f_{([λ])}$ exists a.e. on E and that the result is false if λ = k-1; it is further proved that if λ is any positive integer and if the approximate Peano derivative $f_{(λ),a}$ exists on E then $f_{(λ)}$ exists a.e. on E.
    Źródło:
    Fundamenta Mathematicae; 1996, 151, 1; 21-38
    0016-2736
    Pojawia się w:
    Fundamenta Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Angular Differential Cross-Section for Electron Transfer in ION-ION Collision
    Autorzy:
    Bhattacharyya, S.
    Bhattacharyya, S. K.
    Mitra, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968872.pdf
    Data publikacji:
    1998-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    34.70.+e
    Opis:
    Angular differential cross-sections for the formation of He$\text{}^{0}$ in collision between fast He$\text{}^{+}$ ions are calculated using distorted wave Coulomb-Born approximation. The interaction potentials satisfy necessary Coulomb boundary conditions. In absence of any other theoretical results the present results are compared with the existing experimental data.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 4; 601-610
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recursive-rule extraction algorithm with J48graft and applications to generating credit scores
    Autorzy:
    Tanaka, Y.
    Takagi, T.
    Saito, T.
    Iiduka, H.
    Kikuchi, H.
    Bologna, G.
    Mitra, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/91868.pdf
    Data publikacji:
    2016
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    Rule Extraction
    Credit Scoring
    Re-RX algorithm
    J48graft
    Opis:
    The purpose of this study was to generate more concise rule extraction from the Recursive- Rule Extraction (Re-RX) algorithm by replacing the C4.5 program currently employed in Re-RX with the J48graft algorithm. Experiments were subsequently conducted to determine rules for six different two-class mixed datasets having discrete and continuous attributes and to compare the resulting accuracy, comprehensibility and conciseness. When working with the CARD1, CARD2, CARD3, German, Bene1 and Bene2 datasets, Re-RX with J48graft provided more concise rules than the original Re-RX algorithm. The use of Re-RX with J48graft resulted in 43.2%, 37% and 21% reductions in rules in the case of the German, Bene1 and Bene2 datasets compared to Re-RX. Furthermore, the Re-RX with J48graft showed 8.87% better accuracy than the Re-RX algorithm for the German dataset. These results confirm that the application of Re-RX in conjunction with J48graft has the capacity to facilitate migration from existing data systems toward new concise analytic systems and Big Data.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2016, 6, 1; 35-44
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Population Loss in Closed Optical Transitions οf Rb and Cs Atoms Confined in Micrometric Thin Cells
    Autorzy:
    Biancalana, V.
    Cartaleva, S.
    Dancheva, Y.
    Gosh, P.
    Mariotti, E.
    Mitra, S.
    Moi, L.
    Petrov, N.
    Ray, B.
    Sarkisyan, D.
    Slavov, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791199.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.30.-r
    32.70.Jz
    Opis:
    We present the first experimental observation of narrow dips in the fluorescence profiles of completely closed hyperfine transitions in Rb vapor at high atomic density, which is attributed to the depolarization of the excited state. Moreover, at low atomic density, a narrow peak on the top of the fluorescence profile is demonstrated, centered at the completely closed transition within the $D_{2}$ line of Cs. Experiments are performed in thin (700 μm) alkali cell by single light beam spectroscopy. The cell is filled with Cs containing a small portion of Rb.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 495-497
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and phenotype of peripheral erythrocytes of fish: a rapid screening of images by using software
    Autorzy:
    Nath Talapatra, S.
    Mitra, P.
    Swarnakar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/10978.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Many information of biological study as stained cells analysis under microscope cannot be obtained rich information like detail morphology, shape, size, proper intensity etc. but image analysis software can easily be detected all these parameters within short duration. The cells types can be yeast cells to mammalian cells. An attempt has been made to detect cellular abnormalities from an image of metronidazole (MTZ) treated compared to control images of peripheral erythrocytes of fish by using non-commercial, open-source, CellProfiler (CP) image analysis software (Ver. 2.1.0). The comparative results were obtained after analysis the software. In conclusion, this image based screening of Giemsa stained fish erythrocytes can be a suitable tool in biological research for primary toxicity prediction at DNA level alongwith cellular phenotypes. Moreover, still suggestions are needed in relation to accuracy of present analysis for Giemsa stained fish erythrocytes because previous works have been carried out images of cells with fluorescence dye.
    Źródło:
    International Letters of Natural Sciences; 2016, 54
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-enzymatic browning and flavour kinetics of vacuum dried onion slices
    Autorzy:
    Mitra, J.
    Shrivastava, S.L.
    Rao, P.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/24489.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    non-enzymatic browning
    flavour kinetics
    vacuum drying
    onion slice
    rehydration ratio
    Opis:
    Onion slices were dehydrated under vacuum to produce good quality dried ready-to-use onion slices. Colour development due to non-enzymatic browning and flavour loss in terms of thiosulphinate concentration was determined, along with moisture content and rehydration ratio. Kinetics of non-enzyma-tic browning and thiosulphinate loss during drying was analysed. Colour change due to non-enzymatic browning was found to be much lower in the case of vacuum dried onion, and improved flavour retention was observed as compared to hot air dried onion slices. The optical index values for non-enzymatic browning varied from 18.41 to 38.68 for untreated onion slices and from 16.73 to 36.51 for treated slices, whereas thiosulphinate concentration in the case of untreated onion slices was within the range of 2.96-3.92 μmol g-1 for dried sample and 3.71-4.43 μmol g-1 for the treated onion slices. Rehydration ratio was also increased, which may be attributed to a better porous structure attained due to vacuum drying. The treatment applied was found very suitable in controlling non-enzymatic browning and flavour loss during drying, besides increasing rehydration ratio. Hence, high quality dried ready- to-use onion slices were prepared.
    Źródło:
    International Agrophysics; 2015, 29, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanism of inhibition of smooth muscle of guinea-pig taenia coli by chloramphenicol
    Autorzy:
    Pramanik, P
    Datta, S.C.
    Mitra, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/69217.pdf
    Data publikacji:
    1994
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    muscle
    taenia coli
    smooth muscle inhibition
    guinea pig
    chloramphenicol
    Źródło:
    Journal of Physiology and Pharmacology; 1994, 45, 1
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of different intensities of cold stress on certain physiological phenomena related to skeletal health in a hypogonadal rat model
    Autorzy:
    Islam, M.N.
    Chanda, S.
    Mitra, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/69914.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    skeletal change
    bone turnover
    mineral content
    bone density
    body mass
    rat
    cold stress
    bone ash
    calcium
    estrogen
    ovariectomy
    bone metabolism
    osteoporosis
    skeletal health
    hormone
    Źródło:
    Journal of Physiology and Pharmacology; 2000, 51, 4,2
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tidal characteristics in the Gulf of Khambhat, Northern Arabian Sea — based on observation and global tidal model data
    Autorzy:
    Mitra, A.
    Kumar, V.S.
    Jena, B.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079079.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    tidal model
    sea level
    wind
    bathymetry
    MIKE21 model
    FES2014 model
    Khambhat Gulf
    Arabian Sea
    Opis:
    Tidal characteristics of the Gulf of Khambhat are described based on measured and modelled sea-level data. Data were recorded at three locations inside and two locations outside the Gulf with record lengths of 6–12 months to study the tidal propagation. A northward increase in tidal amplitude is noticed from Daman (eastern side) and Diu (western side) and attains maxima at Bhavnagar. A similar trend is followed by the amplitude of the major tidal constituents, although there are discrepancies for that of the minor constituents. The non-tidal factor which influences the sea-level is the local wind, especially the alongshore component of wind. A positive correlation is obtained between the sea-level and the meridional component of wind at each location. Harmonic analysis of sea-level data shows that M2 is the major tidal constituent which propagates in a non-linear fashion inside the Gulf. Tides from two global tide models (MIKE21 and FES2014) have been compared with the measured data, which could be used for further prediction of the tides and sediment transport in the Gulf. The tide elevation derived from the MIKE21 model has further been used for the harmonic analysis of tide. The tides predicted using one-month data are up to 10% smaller than those predicted using the one-year data. The global tide model FES2014 data performs well with measured data for offshore locations, whereas it fails to predict the same for the inner Gulf locations. The study manifests the fact that to understand the dynamics of complex tidal areas, regional models should better be used than global tidal models.
    Źródło:
    Oceanologia; 2020, 62, 4PA; 443-459
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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