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    Wyświetlanie 1-9 z 9
    Tytuł:
    Trichodina johniusi sp. n. (Ciliophora: Trichodinidae) from Johnius coitor (Hamilton, 1822) in the Shitalakshya River, Bangladesh
    Autorzy:
    Kibria, M.M.
    Islam, H.
    Asmat, G.S.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/838227.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Trichodina johniusi
    new species
    Ciliophora
    Trichodinidae
    Johnius coitor
    Shitalakshya River
    Bangladesh
    fish
    ectoparasite
    parasite
    Źródło:
    Annals of Parasitology; 2011, 57, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Trichodina johniusi sp. n. (Ciliophora: Trichodinidae) from Johnius coitor (Hamilton, 1822) in the Shitalakshya River, Bangladesh
    Autorzy:
    Kibria, M.M.
    Islam, H.
    Asmat, G.S.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2143266.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Trichodina johniusi
    new species
    Ciliophora
    Trichodinidae
    Johnius coitor
    Shitalakshya River
    Bangladesh
    fish
    ectoparasite
    parasite
    Opis:
    During a survey on species diversity of trichodinid ciliates from freshwater fishes in the Shitalakshya River of Gazipur district, Bangladesh, a new species of ciliate was identified and described using the silver nitrate impregnation method. The species is described from the gills of Johnius coitor in the Shitalakshya River of Gazipur district. Trichodina johniusi sp. n. may be characterised by having broad, rounded and slightly curved blades with shallow semilunar curve; relatively short, slim rays having parallel borders, but ill defined ray apophysis; ray tip never touches a well defined, undivided central circle, encircled by undulated perimeter, interspersed with black patches or granules; and the adoral cilia described a turn of approximately 400°. Based on these characters and the unique shape and absence of variability of the denticles among the silver impregnated specimens of the present species, it may be said that to a lesser extent, resembles T. domerguei.
    Źródło:
    Wiadomości Parazytologiczne; 2011, 57, 4; 265-270
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A two-stage stochastic programming approach for production planning system with seasonal demand
    Autorzy:
    Mahmoud, Asmaa A.
    Aly, Mohamed F.
    Mohib, Ahmed M.
    Afefy, Islam H.
    Powiązania:
    https://bibliotekanauki.pl/articles/952860.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    process manufacturing system
    two-stage stochastic programming
    sampling average approximation
    Opis:
    Seasonality is a function of a time series in which the data experiences regular and predictable changes that repeat each calendar year. Two-stage stochastic programming model for real industrial systems at the case of a seasonal demand is presented. Sampling average approximation (SAA) method was applied to solve a stochastic model which gave a productive structure for distinguishing and statistically testing a different production plan. Lingo tool is developed to obtain the optimal solution for the proposed model which is validated by Math works Matlab. The actual data of the industrial system; from the General Manufacturing Company, was applied to examine the proposed model. Seasonal future demand is then estimated using the multiplicative seasonal method, the effect of seasonality was presented and discussed. One might say that the proposed model is viewed as a moderately accurate tool for industrial systems in case of seasonal demand. The current research may be considered a significant tool in case of seasonal demand. To illustrate the applicability of the proposed model a numerical example is solved using the proposed technique. ANOVA analysis is applied using MINITAB 17 statistical software to validate the obtained results.
    Źródło:
    Management and Production Engineering Review; 2020, 11, 1; 31--42
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An improved ID - based client authentication with key agreement scheme on ECC for mobile client - server environments
    Autorzy:
    Islam, S. K. H.
    Biswas, G. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/375740.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Elliptic curve cryptography
    identity-based cryptosystem
    mutual authentication
    session key
    users' anonymity
    client-server environment
    Opis:
    In wireless mobile networks, a client can move between different locations while staying connected to the network and access the remote server over the mobile networks by using their mobile devices at anytime and anywhere. However, the wireless network is more prone to some security attacks, as it does not have the ingrained physical security like wired networks. Thus, the client authentication is required while accessing the remote server through wireless network. Based on elliptic curve cryptosystem (ECC) and identity-based cryptography (IBC), Debiao et al. proposed an ID-based client authentication with key agreement scheme to reduce the computation and communication loads on the mobile devices. The scheme is suitable for mobile client-server environments, is secure against different attacks and provides mutual authentication with session key agreement between a client and the remote server as they claimed. Unfortunately, this paper demonstrates that Debiao et al.' scheme is vulnerable some cryptographic attacks, and proposed an improved ID-based client authentication with key agreement scheme using ECC. The proposed scheme is secure based on Elliptic Curve Discrete Logarithm Problem (ECDLP) and Computational Diffie- Helmann Problem (CDHP). The detail analysis shows that our scheme overcomes the drawbacks of Debiao et al.'s scheme and achieves more functionality for the client authentication with lesser computational cost than other schemes.
    Źródło:
    Theoretical and Applied Informatics; 2012, 24, 4; 293-312
    1896-5334
    Pojawia się w:
    Theoretical and Applied Informatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficient and provably - secure digital signature scheme based on elliptic curve bilinear pairings
    Autorzy:
    Islam, S. K. H.
    Biswas, G. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/375650.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Elliptic curve cryptography
    bilinear pairing
    Map-to-point function
    digital signature
    random oracle model
    provably secure
    Opis:
    We proposed an efficient and secure digital signature scheme using elliptic curve cryptography (ECC) and bilinear pairings in this paper. The proposed scheme employs the general cryptographic hash function (i.e., SHA-1) instead of map-to-point function, because the map-to-point is a cost-intensive operation and it is usually implemented as a probabilistic algorithm. Further, our scheme is computationally efficient as one bilinear paring and three elliptic curve scalar point multiplication operations are executed for signature generation and verification, and thus the scheme requires much lesser computation cost than other related schemes. In addition, in the random oracle model, our scheme is proven to be existential unforgeable against the adaptive chosen message and identity attacks (EUF-CMA) based on a variation of the collusion attack algorithm with ktraitors (k-CAA3) problem.
    Źródło:
    Theoretical and Applied Informatics; 2012, 24, 2; 109-118
    1896-5334
    Pojawia się w:
    Theoretical and Applied Informatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Virtual Reality for Remote Ship Inspections and Surveys – A Systematic Review
    Autorzy:
    Sheriff, A.
    Anantharaman, M.
    Islam, R.
    Nguyen, H. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201482.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    international transport
    real time
    unmanned aerial vehicle
    remote control
    virtual reality
    flag state duty
    coronavirus pandemic
    Opis:
    The use of virtual reality for the establishment of compliance is a potential game-changer in enabling real-time remote inspections/ surveys of vessels. When provided with high-speed internet access, robots or remote-controlled inspection vehicles such as drones, crawlers, unmanned aerial vehicles (UAVs), and so on, may be equipped with remote inspection technologies (RITs), and smart optical cameras and sensor suites in conjunction with wearable technologies, and smart/ mobile devices, to carry out an aerial and underwater virtual assessment of the coating condition of the steel structural members of the vessel while transmitting the data in real-time or near real-time, via collaborative software. To ease the travel restrictions and border closures prompted by the Coronavirus (COVID-19), these novel technologies have been introduced by some flag states and classification as alternatives to traditional in-person statutory inspections/ class surveys. This study aims to employ a systematic literature review (SLR) approach to (1) classify the profiles of existing publications related to remote inspections/ surveys, (2) highlight the key thematic areas being discussed within the domain of remote inspections/ surveys and identify tasks and processes that may require virtual reality application. To the best of our knowledge, the findings have revealed that there is no existing SLR paper related to the application of remote inspection techniques in ship inspections/ surveys. However, the review retrieved 28 primary studies from the following databases: Scopus, Web of Science, Science Direct, and Google Scholar. Based on the results, various studies have proposed multifarious solutions to overcoming the existing technical and regulatory barriers to the mass deployment of these cutting-edge technologies.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 587--594
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Miniature size multiband planar patch antenna fabricated on a bioplastic substrate
    Autorzy:
    Ahsan, M. R.
    Islam, M. T.
    Ullah, M. H.
    Arshad, H.
    Ali, M. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/199786.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioplastic substrate material
    multiband antenna
    planar patch antenna
    RFID
    C/X band
    WiMAX application
    substrat
    antena szerokopasmowa
    C/X
    aplikacja WiMAX
    Opis:
    In this article, a simple design of rectangular microstrip feed planar antenna with wide arcs and square shape slot is proposed for Radio Frequency Identification (RFID),Worldwide Interoperability for Microwave Access (WiMAX) and C/X-band wireless communications. The prototype of the antenna has been fabricated 1.0 mm thick ceramic filled bioplastic substrate by using optimal dimension obtained from design/simulations and antenna performances are experimentally tested. The experimental results confirm the impedance bandwidths for S11 ≤ −10 dB are of 712 MHz (0.355-1.067 GHz), 1.38 GHz (2.92-4.3 GHz) and 2.46 GHz (6.55-9.01 GHz) for 0.788, 3.34 and 8.01 GHz band respectively. The proposed antenna shows almost steady and symmetrical radiation patterns for all three bands with the maximum gains of 1.37, 2.8 and 3.56 dBi respectively. Based on the antenna performances, it can successfully cover the frequency band requirement for RFID, WiMAX and C/X-band applications.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 971-976
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications
    Autorzy:
    Das, S K.
    Islam, J. M. M.
    Hasan, M.
    Kabir, H.
    Gafur, Md. A.
    Hoque, E.
    Khan, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412543.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Conductive thin film
    Composite
    TiO2
    Solar cell
    Optoelectronics
    Sodium alginate
    Opis:
    Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6 % sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6 % sand containing composite film are found to be 4.445 MPa, 9.76 %, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase of sand content. Lowest water uptake properties and highest stability were demonstrated by 6 % sand containing sample. Electrically conductive composite films have useful applications for solar cells and optoelectronics. Thus, this study is very much expected to aid in the design and selection of proper composite for the potential application of solar cell and optoelectronics.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 90-101
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gamma radiation treated chitosan solution for strawberry preservation: Physico-chemical properties and sensory evaluation
    Autorzy:
    Jesmin, S.
    Al-Jubayer, A.
    bin Eusuf, S.
    Kamal, A.H.M.
    Islam, J.M.M.
    Ferdoush, F.
    Kabir, S.E.
    Khan, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11054.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 60
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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