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    Wyświetlanie 1-12 z 12
    Tytuł:
    Behavioral pattern of commercial public transport passengers in Lagos metropolis
    Autorzy:
    Afolabi, O. J.
    Hassan, A. M.
    Age, L. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2140805.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja Centrum Badań Socjologicznych
    Tematy:
    mobility
    passengers
    travel
    accessibility
    Lagos
    Opis:
    This study examined the travel behawior of commercial public transport passengers in Lagos State, Nigeria. The descriptive research survey was used in order to assess the opinions of the respondents using the questionnaire. A total of 84 samples were used as representative population, while two null hypotheses were formulated and tested using the Pearson Product Moment Correlation Coefficient at 0.05 level of significant. The results that were obtained indicated that a positive correlation exists between frequency of travel and commuters income in Lagos Metropolis and also that a positive correlation exists between frequency of travel and distance covered by commuters in Lagos Metropolis. Secondary data was also sourced to serve as complement to the primary data, thus allowing for a robust research. Descriptive statistical tools such as percentages were also adopted to present the socio-economic characteristics in the area. Findings showed that about 57% of sampled population are male, 62 % are civil servants, 48% of respondents travel for business purposes. Also, that majority of the respondents (50%) said that the commercial public transport is highly prone to accident, while about 64% of the respondents commute on daily basis. It was established that lack of transport infrastructure coupled with poor road maintenance were seen as the leading causes of inaccessibility of the area.
    Źródło:
    Journal of Sustainable Development of Transport and Logistics; 2017, 2, 1; 40-50
    2520-2979
    Pojawia się w:
    Journal of Sustainable Development of Transport and Logistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a UAV-based system for the semi-automatic estimation of the volume of earthworks
    Autorzy:
    Ajayi, Oluibukun G.
    Oyeboade, Timothy O.
    Samaila-Ija, Hassan A.
    Adewale, Taiwo J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1444927.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Unmanned Aerial Vehicle
    earthworks
    stockpile volume estimation
    spatial data
    Digital Elevation Model
    bezzałogowy statek powietrzny
    roboty ziemne
    dane przestrzenne
    cyfrowy model wysokości
    Opis:
    One of the challenges faced by surveyors in acquisition of accurate spatial data for mining applications is the risk involved in acquiring data in rugged terrains and difficult or inaccessible areas. With the advent of modern technology, accurate geospatial data can now be safely obtained for proper mining documentation periodically. The use of Unmanned Aerial Vehicles (UAVs) for data acquisition in mine surveying has been a viable means of obtaining reliable geospatial data rapidly and efficiently. The main goal of this study is to develop a semi-automatic UAV-based system for the acquisition of spatial data required for the estimation of the volume of earthworks. A DJI Phantom 4 quadcopter was used for the acquisition of image data of the project site, while the images were processed into a Digital Elevation Model (DEM) using Pix4Dmapper v2.0.1, which was then imported into the MATLAB-based system developed for the automatic estimation of the volume of earthworks. The volume obtained from the automated system was thus compared with the volume obtained directly from the Pix4Dmapper software, having specified a contour interval of 1 and an allowable error rate of ±3% as the standard error. While ±1.02% error was observed in the volume estimated using the Pix4Dmapper, the developed automated system yielded an estimated precision of ±0.81% in its volume estimation, which proves to be more robust for automatic volume estimation in terms of accuracy and precision.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2020, 110; 21-28
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Extract-Fractions of Balanites aegyptiaca Fruit-Mesocarp on Glucose Metabolizing Enzymes in Diabetic Rats
    Autorzy:
    Mhya, Daniel Hassan
    Alegbejo, Janet O.
    Anigo, Kola Matthew
    Umar, Ismail Alhaji
    Powiązania:
    https://bibliotekanauki.pl/articles/1164117.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Balanites aegyptiaca
    Ethanol Extract-Fractions
    Fruit-Mesocarp
    glucose metabolizing enzymes
    Opis:
    Several antidiabetic medicinal plants has shown to exhibit one of more mechanisms to low blood glucose. Balanites aegyptiaca fruit extract has shown to low blood glucose via some of the mechanisms but whether the fruit extract could stimulate glycolysis, glycogenesis, and inhibit gluconeogenesis and glycogenolysis are not fully clear. Hence, the need to evaluate the plant extract on the activities of enzymes in glycolysis, gluconeogenesis, glycogenolysis and glycogenesis in streptozotocin-induced diabetic rats. Ethanol extract of defatted Balanites aegyptiaca fruit-mesocarp was petition with water and ethyl acetate (1:1 v/v) then separated. Aqueous and ethyl acetate fractions obtained were separately administered to streptozotocin-induced diabetic rats daily for 28 days period. Results of the study showed that treating diabetic rats with either aqueous or ethyl acetate fractions of ethanol extract of Balanites aegyptiaca fruit-mesocarp exert significant regulatory effect on the activities of some key hepatic enzymes of glucose metabolism. The aqueous fraction (AFF) in particular enhances glucokinase activity (from 2.22±0.02 to 3.58±0.05 U/min/mg protein) and G6PDH activity (from 1.45±0.02 to 2.10±0.02 U/min/mg protein) but suppressed glucose-6-phosphatase (from 1.44±0.05 to 0.17±0.00 U/min/µmole Pi liberated) among others. In conclusion, ethanol-aqueous fraction of Balanites aegyptiaca fruit-mesocarp exert glucose enzymes regulatory effect by enhancing glucokinase and G6PDH activity but suppressed gluconeogenic enzymes possibly to low blood glucose in diabetic rats. Further research is needed to explore the plant extract (ethanol-aqueous fraction) in order to ascertain the bioactive hidden compounds.
    Źródło:
    World Scientific News; 2018, 108; 180-194
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of radiation and Eckert number on MHD flow with heat transfer rate near a stagnation point over a non-linear vertical stretching sheet
    Autorzy:
    Fenuga, O. J.
    Hassan, A. R.
    Olanrewaju, P. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/264652.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przepływ magnetohydrodynamiczny
    transfer ciepła
    transfer masy
    liczba Eckerta
    MHD flow
    heat and mass transfer
    radiation
    Eckert number stagnation–point
    non-linear vertical stretching sheet
    Opis:
    This work investigates the effects of radiation and Eckert number on an MHD flow with heat transfer rate near a stagnation-point region over a nonlinear vertical stretching sheet. Using a similarity transformation, the governing equations are transformed into a system of ordinary differential equations which are solved numerically using the sixth order Runge-Kutta method with shooting technique. Tabular and graphical results are provided to examine the physical nature of the problem. Heat transfer rate at the surface decreases with radiation, Eckert number and as radiation increases, the flow temperature also increases for velocity ratio parameters […].
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 1; 27-36
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mixed convection in MHD flow and heat transfer rate near a stagnation-point on a non-linear vertical stretching sheet
    Autorzy:
    Fenuga, O. J.
    Hassan, A. R.
    Olanrewaju, P. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/265943.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konwekcja mieszana
    przepływ magnetohydrodynamiczny
    wymiana ciepła
    mixed convection
    MHD flow
    heat transfer rate
    stagnation point
    non-linear vertical stretching sheet
    Opis:
    This work investigates the mixed convection in a Magnetohydrodynamic (MHD) flow and heat transfer rate near a stagnation-point region over a nonlinear vertical stretching sheet. Using a similarity transformation, the governing equations are transformed into a system of ordinary differential equations which are solved numerically using the fourth order Runge-Kutta method with shooting technique. The influence of pertinent flow parameters on velocity, temperature, surface drag force and heat transfer rate are computed and analyzed. Graphical and tabular results are given to examine the nature of the problem. The heat transfer rate at the surface increases with the mixed convection.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 1; 37-51
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and Elemental Composition of Cerate-Zirconate Compound as-Prepared by a Sol-Gel Technique
    Autorzy:
    Osman, N.
    Abdullah, N.
    Ibarahim, N.
    Hassan, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400572.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.16.Be
    82.45.Aa
    Opis:
    Powder of $BaCe_{0.54}Zr_{0.36}Y_{0.1}O_{2.95}$ (BCZY) ceramics compound was synthesized by a modified sol-gel method using triethylenetetraamine, TETA as a chelating agent. The samples were dried and calcined at 325°C and 1100°C, respectively. The resulting powder properties were characterized using Particle Size Analyzer (PSA), Scanning Electron Microscope (SEM), X-Ray Fluorescence Spectroscopy (XRF) and Energy Dispersive X-Ray (EDX). At calcination temperature of 1100°C, the sample shows particles with high purity, spherical shape and a single particle size distribution in the range of 342-396 nm. XRF and EDX analysis revealed that the elemental composition of Ba, Ce, Zr and Y present in the sample is almost the same as the nominal stoichiometric composition of BCZY compound. Thus, TETA is one of the potential chelating agents that can be used to synthesize high purity and homogeneous spherically grained cerate-zirconate powders.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 931-933
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oscillation behavior of second order nonlinear neutral differential equations with deviating arguments
    Autorzy:
    Elabbasy, E. M.
    Hassan, T. S.
    Moaaz, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/255993.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    oscillation
    second order
    neutral differential equations
    deviating arguments
    Opis:
    Oscillation criteria are established for second order nonlinear neutral differential equations with deviating arguments of the form [formula] where α > 0 and z(t) = x(t) + p(t)x(t - ϒ). Our results improve and extend some known results in the literature. Some illustrating examples are also provided to show the importance of our results.
    Źródło:
    Opuscula Mathematica; 2012, 32, 4; 719-730
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    RED-LE: A Revised Algorithm for Active Queue Management
    Autorzy:
    Hassan, Samuel O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2142301.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    active queue management
    network congestion
    router
    RED-LE
    simulation
    Opis:
    The random early detection (RED) algorithm was developed in 1993. Nearly three decades later, several improved variants have been proposed by scientists. The use of a (pure) linear function for computing packet drop probability has turned out to be a disadvantage, leading to the problem of large delays. Such a problem may be addressed by using linear and non-linear (i.e. as exponential) packet drop probability functions. This paper proposes a revised RED active queue management algorithm named RED-linear exponential (RED-LE). This variant involves an interplay of linear and exponential drop functions, in order to improve the performance of the original RED algorithm. More importantly, at low and moderate network traffic loads, the RED-LE algorithm employs the linear drop action. However, for high traffic loads, RED-LE employs the exponential function for computing the packet drop probability rate. Experimental results have shown that RED-LE effectively controls congestion and offers an improved network performance under different traffic loads.
    Źródło:
    Journal of Telecommunications and Information Technology; 2022, 2; 91--97
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Responses of maize varieties to salt stress in relation to germination and seedling growth
    Autorzy:
    Hassan, N.
    Hasan, Md.K.
    Shaddam, Md.O.
    Islam, M.S.
    Barutcular, C.
    EL Sabagh, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11757.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 69
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Treatment of Hospital Wastewater Using Electrocoagulation Process – Analysis by Response Surface Methodology
    Autorzy:
    Salah Al-Shati, Ahmed
    Alabboodi, Khalid O.
    Shamkhi, Hassan A.
    Abd, Zahraa N.
    Emeen, Sara I. Mohammed
    Powiązania:
    https://bibliotekanauki.pl/articles/2202336.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    electrocoagulation
    RSM
    response surface methodology
    COD removal
    Opis:
    Electrocoagulation (EC) can be defined a method utilized to remove pollutants from wastewater by applying an electric current to sacrificial electrodes. Many experimental variables like NaCl content (0–4 g/l), current density (5–25 mA/cm2), time (30–90 mins), and pH (4–10) that influence the removal efficiency regarding COD were considered. In the presented research, three distinct configurations related to electrodes, i.e. Al-Al, Fe-Al, and Fe-Fe, have been utilized to determine which was the most effective. RSM depending on BBD was utilized for optimizing various operational parameters with regard to HWW by use of EC. Maximum COD removal (97.9%) was reached at Fe-Al electrodes, NaCl (3.2 g/l), current density (24.7 mA/cm2), time (81.7 mins), and pH (7.4). COD removal (91.3%) was achieved at the Al-Al electrodes, NaCl (3.8 g/l), current density(23.5 mA/cm2), time-86.3 min, and Ph (7.7). At the Fe-Fe electrodes, the removal of COD (89.5%) was obtained at NaCl (2.3 g/l), current density (24.6 mA/cm2), pH 8.5, and time (86.9 min). This indicates that EC could remove pollutants from different types of wastewaters under many operating parameters and with arrangements of electrodes.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 1; 260--276
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urban planning of Khartoum. History and modernity. Part I. History
    Urbanistyka Chartumu. Historia oraz współczesność. Część I. Historia
    Autorzy:
    Hassan, S.S.
    Elkheir, O.
    Kobylarczyk, J.
    Kuśnierz-Krupa, D.
    Chałupski, A.
    Krupa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/960302.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Konserwatorów Zabytków
    Tematy:
    Sudan
    Khartoum
    spatial development
    history
    Chartum
    rozwój przestrzenny
    historia
    Opis:
    This article is the first part of a study concerning the spatial development of Khartoum and addresses the issue of the city’s origins and history. Khartoum is the capital of Sudan and the main political, commercial and cultural centre of the country. The city, founded in the 19th century, at the confluence of the White and the Blue Nile, is an example of a fascinating urban structure consisting of three independently functioning centres: Khartoum, Umm-Durman and Khartoum North.
    Niniejszy artykuł jest pierwszą częścią opracowania dotyczącego rozwoju przestrzennego Chartumu i podejmuje problematykę genezy oraz historii powstania miasta. Chartum jest stolicą Sudanu oraz głównym ośrodkiem politycznym, handlowym i kulturalnym tego kraju. Miasto, założone w wieku XIX, w miejscu połączenia Białego i Błękitnego Nilu, jest przykładem ciekawej struktury urbanistycznej, złożonej z trzech, niezależnie funkcjonujących ośrodków: Chartumu, Omdurmanu oraz Chartumu Północnego.
    Źródło:
    Wiadomości Konserwatorskie; 2017, 51; 86-94
    0860-2395
    2544-8870
    Pojawia się w:
    Wiadomości Konserwatorskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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