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Wyszukujesz frazę "Uddin, M. S." wg kryterium: Autor

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    Tytuł:
    A New Star-Like SurfaceTexture for Enhanced Hydrodynamic Lubrication Performance
    Autorzy:
    Uddin, M. S.
    Liu, Y. W.
    Shankar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/356465.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    surface texturing
    friction
    film pressure
    numerical modelling
    Reynolds equation
    Opis:
    This paper presents a numerical modelling and optimization of a new ‘star-like’ geometric texture shape with an aim to improve tribological performance. Initial studies showed that the triangle effect is the most dominant in reducing the friction. Motivated with this, a ‘star-like’ texture shape consisting of a series of triangular spikes around the centre of the texture is proposed. It is hypothesised that by increasing the triangular effect on a texture shape, the converging micro-wedge effect is expected to increase, hence increasing the film pressure and reducing the friction. Using the well-known Reynolds boundary conditions, numerical modelling of surface texturing is implemented via finite difference method. Simulation results showed that the number of apex points of the new ‘star-like’ texture has a significant effect on the film pressure and the friction coefficient. A 6-pointed texture at a texture density of 0.4 is shown to be the optimum shape. The new optimum star-like texture reduces the friction coefficient by 80%, 64.39%, 19.32% and 16.14%, as compared to ellipse, chevron, triangle and circle, respectively. This indicates the potential benefit of the proposed new shape in further enhancing the hydrodynamic lubrication performance of slider bearing contacts.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1863-1869
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response of non-linear shock absorbers-boundary value problem analysis
    Autorzy:
    Rahman, M. A.
    Ahmed, U.
    Uddin, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265424.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    amortyzator
    tłumik drgań
    stabilność
    wartość graniczna
    shock absorber
    untuned vibration damper
    frequency ratios
    non-linear springs
    non-linear dampers
    stability
    boundary value problem
    multisegment method of integration
    Opis:
    A nonlinear boundary value problem of two degrees-of-freedom (DOF) untuned vibration damper systems using nonlinear springs and dampers has been numerically studied. As far as untuned damper is concerned, sixteen different combinations of linear and nonlinear springs and dampers have been comprehensively analyzed taking into account transient terms. For different cases, a comparative study is made for response versus time for different spring and damper types at three important frequency ratios: one at r = 1, one at r > 1 and one at r <1. The response of the system is changed because of the spring and damper nonlinearities; the change is different for different cases. Accordingly, an initially stable absorber may become unstable with time and vice versa. The analysis also shows that higher nonlinearity terms make the system more unstable. Numerical simulation includes transient vibrations. Although problems are much more complicated compared to those for a tuned absorber, a comparison of the results generated by the present numerical scheme with the exact one shows quite a reasonable agreement.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 793-814
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolutionary stable strategies in networked games: the influence of topology
    Autorzy:
    Kasthurirathna, D.
    Piraveenan, M.
    Uddin, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/91531.pdf
    Data publikacji:
    2015
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    evolutionary game theory
    competing strategy
    evolutionary stability
    network topology
    Zero-determinant strategy
    Pavlov strategy
    players population
    topological stability
    cooperator strategy
    ewolucyjna teoria gier
    strategia współzawodnictwa
    stabilność ewolucyjna
    topologia sieci
    strategia Pavlova
    populacja graczy
    stabilność topologiczna
    strategia współpracy
    Opis:
    Evolutionary game theory is used to model the evolution of competing strategies in a population of players. Evolutionary stability of a strategy is a dynamic equilibrium, in which any competing mutated strategy would be wiped out from a population. If a strategy is weak evolutionarily stable, the competing strategy may manage to survive within the network. Understanding the network-related factors that affect the evolutionary stability of a strategy would be critical in making accurate predictions about the behaviour of a strategy in a real-world strategic decision making environment. In this work, we evaluate the effect of network topology on the evolutionary stability of a strategy. We focus on two well-known strategies known as the Zero-determinant strategy and the Pavlov strategy. Zero-determinant strategies have been shown to be evolutionarily unstable in a well-mixed population of players. We identify that the Zero-determinant strategy may survive, and may even dominate in a population of players connected through a non-homogeneous network. We introduce the concept of ‘topological stability’ to denote this phenomenon. We argue that not only the network topology, but also the evolutionary process applied and the initial distribution of strategies are critical in determining the evolutionary stability of strategies. Further, we observe that topological stability could affect other well-known strategies as well, such as the general cooperator strategy and the cooperator strategy. Our observations suggest that the variation of evolutionary stability due to topological stability of strategies may be more prevalent in the social context of strategic evolution, in comparison to the biological context.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2015, 5, 2; 83-95
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Resin Treatments on the Quality of Cotton Fabric Dyed with Reactive Dye
    Wpływ wykończenia środkami żywicznymi na jakość tkanin bawełnianych barwionych barwnikami reaktywnymi
    Autorzy:
    Tania, I. S.
    Kabir, S. M.
    Uddin, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/233419.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    cotton
    formaldehyde resin
    crease
    tensile strength
    abrasion
    pilling
    dimensional stability
    bawełna
    żywica formaldehydowa
    marszczenie
    wytrzymałość na rozciąganie
    przetarcie
    stabilność wymiarowa
    Opis:
    In this study, we analysed different resin finishing agents on cotton fabric dyed with reactive dye. Different tests were carried out on the resin treated fabric, such as the wrinkle recovery, tensile strength, dimensional stability, stiffness, abrasion resistance and colour strength (K/S) of the dyed fabrics. Melamine formaldehyde resin treated fabric gave a higher crease recovery angle, better smoothness and higher bending length because of higher crosslinking with cellulose. The colour strength decreased after applying the resin finish, and fastness properties were unaffected by the resin treatments.
    W pracy poddano analizie żywiczne środki wykończeniowe, którymi powleczono tkaniny bawełniane barwione barwnikami reaktywnymi. Tkaniny poddane obróbce żywicą, oceniono pod kątem następujących właściwości: odporność na gniecenie, wytrzymałość na rozciąganie, stabilność wymiarowa, sztywność, odporność na ścieranie i trwałość wybarwienia (K/S) barwionych tkanin. Tkaniny poddane obróbce żywicą melaminowo-formaldehydową lepszą odporność na gniecenie i lepszą gładkość. Natomiast trwałość wybarwienia zmniejszyła się po nałożeniu na tkaninę żywicy.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 1 (127); 102-107
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physico-chemical characterization and microbial studies of muscle lipid of Liner silver grunter (Pomadasys hasta) of the Bay of Bengal
    Autorzy:
    Jahan, F.
    Uddin, M.H.
    Bhattacharjee, S.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/11228.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Lipid was extracted from the lipid containing muscle of Liner silver grunter (Pomadasys hasta) by solvent extraction and then purified by standard method. The physico-chemical properties of lipid sample were determined and compared with those of other standard fats and oils. Fatty acid composition of the lipid sample was investigated by Thin Layer Chromatographic (TLC) examination. Gas Liquid Chromatographic (GLC) examination was performed by the methyl esters mixture prepared from the lipid sample. The de-oiled muscle of the fish was studied for the determination of ash content, fiber content, moisture content and protein content. The lipid containing selected muscle was analyzed quantitatively for the determination of percentages of protein, cholesterol and minerals (N, P, K, Ca, and Na). The lipid containing muscle was also analyzed for the determination of the amount of eleven metals by using Atomic Absorption Spectrophotometric method. The lipid sample was evaluated by microbial activity (bacterial activity against nine bacteria and fungal activity against seven fungi).
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uptake of phenol from aqueous solution by burned water hyacinth
    Autorzy:
    Uddin, M.T.
    Islam, M.S.
    Islam, M.A.
    Abedin, M.Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/779654.pdf
    Data publikacji:
    2008
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fenol
    adsorpcja
    równowaga
    kinetyka adsorpcji
    phenol
    adsorption
    burned water hyacinth
    equilibrium
    adsorption kinetics
    Opis:
    The potential of burned water hyacinth (BWH) for phenol adsorption from aqueous solution was studied. Batch kinetic and isotherm studies were carried out under varying experimental conditions of contact time, phenol concentration, adsorbent dosage and pH. The pH at the point of zero charge (pH(PZC)) of the adsorbent was determined by the titration method and the value of 8.8 š 0.2 was obtained. The FTIR of the adsorbent was carried out in order to find the potential adsorption sites for the interaction with phenol molecules. The Freundlich and Langmuir adsorption models were used for the mathematical description of adsorption equilibrium and it was found that the experimental data fitted very well to the Langmuir model. Maximum adsorption capacity of the adsorbent was found to be 30.49 mg/g. Batch adsorption models, based on the assumption of the pseudo-first-order and pseudo-second-order models, were applied to examine the kinetics of the adsorption. The results showed that kinetic data closely followed the pseudo-second-order model.
    Źródło:
    Polish Journal of Chemical Technology; 2008, 10, 2; 43-49
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of climate change on rice production at Khulna District, Bangladesh
    Autorzy:
    Hossain, N.
    Saifullah, A.S.M.
    Bhuiyan, S.H.
    Uddin, N.
    Rahman, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049750.pdf
    Data publikacji:
    2019
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    rice
    production
    climate change
    trend analysis
    Bangladesh
    gross domestic product
    Mann-Kendall (MK) test
    Rice Production
    Opis:
    In Bangladesh 164 million people depend on rice but due to climate change (CC) vulnerabilities the yield of rice is severely reducing. Therefore, this study aimed to explore the effects of CC on rice yield using recent trend analysis, Mann-Kendall (MK) trend test and correlation. For this study, the required climate and selected rice production data were collected from Bangladesh Meteorological Department (BMD) and Department of Agriculture Extension (DAE), Khulna. In time series statistics both parametric and nonparametric methods were applied to detect a monotonic trend of climatic variability and Aman rice production. Correlation between climatic variability and rice production was also investigated. The study exposed that the temperature and rainfall had an increasing trend and statistically significant whereas the relative humidity found decreasing. Overall, the bright Sunshine had positive trend but week. According to nonparametric trend test of climatic variability and Aman yield only minimum temperature showed a positive trend which found statistically significant. In contrast, Mann-Kendall trend test revealed that rainfall had positively significant while temperature had negative significant. The correlation revealed the Aman production is a strong response with minimum temperature whereas the Lona Coche showed a positive correlation with maximum temperature. The variation of Aman production exhibited a positive correlation with both Rainfall and humidity respectively and Lona Coche found a negative correlation. The sunshine had a week correlation against both yields. The findings suggest should give attention of temperature-tolerant rice varieties to mitigate possible adverse effects of CC.
    Źródło:
    Environment, Earth and Ecology; 2019, 3, 1; 42-54
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Significant Influence of Annealing Temperature and Thickness of Electrode on Energy Conversion Efficiency of Dye Sensitized Solar Cell: Effect of Catalyst
    Autorzy:
    Uddin, J.
    Islam, J. M. M.
    Khan, S. M. M.
    Hoque, E.
    Khan, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412298.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dye Sensitized Solar Cell
    sensitizer
    catalyst
    annealing temperature
    thickness
    Opis:
    Dye sensitized solar cell (DSSC) shows great promise as an alternative to conventional p-n junction solar cells due to their low fabrication cost and reasonably high efficiency. DSSC was assembled by using natural dye extracted from red amaranth (Amaranthus Gangeticus) as a sensitizer and different catalysts for counter electrode were applied for maximum energy conversion efficiency. Annealing temperature and thickness of electrode were also investigated and optimized. Catalyst, annealing temperature and thickness were optimized by the determination of cell performance considering photoelectrochemical output and measuring current and voltage; then calculating efficiency and other electrical parameters. The experimental results indicated that samples having 40 μm electrode thickness and prepared at 450 o C annealing temperature showed the best performance.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 78-87
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors contribution to the adoption of production technologies by potato growers in northwest Bangladesh
    Wpływ różnych czynników na dobór technologii produkcji ziemniaków w północno-zachodnim Bangladeszu
    Autorzy:
    Uddin, A.B.M.S.
    Rahman, M.M.
    Alam, M.B.
    Kamaly, M.H.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/44076.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
    Źródło:
    Journal of Agribusiness and Rural Development; 2014, 33, 3
    1899-5241
    Pojawia się w:
    Journal of Agribusiness and Rural Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction, Physico-Chemical Characterization and Antimicrobial Screening of the Muscle Lipid of Cuttle Fish (Sepia esculenta) of the Bay of Bengal
    Autorzy:
    Al-Amin, M.
    Uddin, M. H
    Afrin, A.
    Nath, K. B.
    Barua, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412181.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cuttle fish
    Antibacterial
    Antifungal
    Thin Layer Chromatography
    PUFA
    Opis:
    Lipid was extracted from the muscle of Cuttle fish by solvent extraction method and then purified by suitable conventional method. Various physical constants e.g. refractive index, viscosity, specific gravity, crude fat, crude fibre and ash contents and chemical parameters e.g. saponification value, saponification equivalent value, acid value, iodine value, acetyl value, peroxide value, thiocyanogen value, Reichert-Meissl value, Polenske value, Henher value, cholesterol content etc. of the lipid sample have been determined and compared with those of different standard oils. Fatty acids composition of the sample was investigated by Thin Layer Chromatography (TLC) method. The muscle lipid of Cuttle fish was found to contain palmitic acid, stearic acid, linolenic acid and erucic acid respectively with some other unknown fatty acids. Antimicrobial activities of the lipid were tested by standard method and found moderate to potential antibiotic and antifungal property in this lipid. The lipid containing muscle of Cuttle fish was analyzed quantitatively for the determination of percentages of protein and minerals (N, P, K, Ca) contents by modified Kjeldahl method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 17, 1; 87-97
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Radiological Dose around a 3-MW TRIGA Mark-II Research Reactor
    Autorzy:
    Rahman, A. F. M. M.
    Shamsuzzaman, M.
    Rahman, M. S.
    Uddin, K.
    Yeasmin, S.
    Nazmul, Haque H. M.
    Akramuzzaman, M. M.
    Chakraborty, S. R
    Powiązania:
    https://bibliotekanauki.pl/articles/412377.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    source term
    release rate
    TRIGA Mark-II reactor
    dispersion
    ingestion and deposition of radionuclide
    Gaussian plume model
    dose calculations
    Opis:
    A hypothetical accidental case of a 3-MW TRIGA Mark-II research reactor has been assumed to assess the radiological consequences due to the deposition of 137Cs and 90Sr on ground, vegetation, milk and meat. The air concentrations in sixteen cardinal directions have been estimated where the maximum concentration has been found to be at 110 m distance from the core of the reactor for all the directions. Calculated maximum doses of 137Cs, 90Sr and both 137Cs and 90Sr have been found to be within the ranges of 0.005-0.014 μSv hr–1, 0.013-0.036 μSv hr–1 and 0.018-0.05 μSv hr–1, respectively for all the directions, which are below the measured background dose limit 0.25 μSv hr–1 and also within the IAEA acceptable dose rate limit of 0.5 μSv hr–1. The calculated low doses due to the aforementioned radionuclides can be considered negligible with regard to the radiation hazards. The relationship between total effective dose rate for various pathways (i.e. immersion, inhalation, ground deposition, and ingestion of contaminated vegetation, milk, meat) and air concentration in all the directions has been established. Obtained relation reveals that the total effective dose rate is directly proportional to the air concentration, and the overall proportionality constants for 137Cs and 90Sr radionuclides have been obtained as 0.57 and 0.28, respectively. This study might provide information on the radiological safety required for the radiation protection purposes of the people living in the vicinity of the reactor site.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 183-200
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immunogenicity of recombinant bacterial antigens expressed as fusion proteins in transgenic rice seeds
    Autorzy:
    Zaman, S.
    Islam, S.M.T.
    Khan, M.K.
    Alam, M.M.
    Uddin, M.I.
    Baby, N.I.
    Islam, S.
    Bhuiyan, T.R.
    Qadri, F.
    Seraj, Z.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/80383.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rice seed
    transgenic rice plant
    gene sequence
    fusion protein
    tuberculosis
    vaccine
    oral vaccine
    Ag85B antigen
    cholera
    bacterial antigen
    immunogenicity
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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