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    Wyświetlanie 1-44 z 44
    Tytuł:
    Mg-ZrO2 nanocomposite: relative effect of reinforcement incorporation technique
    Autorzy:
    Hassan, S. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/352756.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    processing
    nanocomposite
    magnesium
    microstructure
    tensile properties
    Opis:
    In tins study, ingot metallurgy and powder metallurgy processes were used to incorporate 0.2 and 0.7 vol% of nano-size ZrO2 particles reinforcement to develop magnesium nanocomposite. Both of the processing methods led to reasonably fair reinforcement distribution, substantial gram refinement and minimum porosity in the nanocomposites. Strengthening effect of nano-ZrO2 reinforcement in the magnesium matrix was greater when incorporated using the ingot metallurgy process. The matrix ductility and resistance to fracture were significantly improved due to the presence of nano-ZrO2 reinforcement when incorporated using the powder metallurgy process. Tensile fracture surfaces revealed that the less-ductile cleavage fracture mechanism of hexagonal close packed magnesium matrix has changed to more ductile mode due to the presence of nano-ZrO2 particles in all the processed nanocomposites.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1521-1528
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biogas Recovery from Refinery Oily Sludge by Co-Digestion Followed by Sustainable Approach for Recycling the Residual Digestate in Concrete Mixes
    Autorzy:
    Jasim, Hassan S.
    Ismail, Zainab Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2204865.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    co-digestion
    biogas recovery
    methane
    Gompertz model
    oily sludge
    refinery oily sludge
    concrete
    Opis:
    This study investigated the potential of biogas recovery from refinery oily sludge (ROS) inoculated with animals’ manure by co-digestion of in lab-scale biodigesters at mesophilic conditions. Cow dung (CD), cattle manure (CM), and poultry manure (PM) were utilized as co-substrates. The biogas production from the co-digestion process exceeds its production from uninoculated ROS by approximately 67.5 %, 22.13% and 21.6% for PM, CM, and CD, respectively. Kinetics of the co-digestion process was well described by the modified Gompertz model. The predicted and experimental values of biogas production were well fitted with R2 > 0.96, suggesting favorable conditions of the digestion process. New approach for recycling the residual digestate to replace freshwater in concrete mixes was carried out. Results of examining the mechanical properties of the residual digestate-modified concrete mixes demonstrated a potential sustainable approach for the disposal of residual digestate in concrete mixes.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 5; 178--191
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinants of Enterprise Resource Planning adoption on organizations performance among medium enterprises
    Czynniki warunkujące pomyślne wdrożenie ERP w średniej wielkości przedsiębiorstwie
    Autorzy:
    Aremu, A. Y.
    Shahzad, A.
    Hassan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/361713.pdf
    Data publikacji:
    2018
    Wydawca:
    Wyższa Szkoła Logistyki
    Tematy:
    Enterprise Resource Planning
    organizational structure
    technological change
    firms performance
    medium-sized enterprises
    planowanie zasobów przedsiębiorstwa
    struktura organizacyjna
    zmiana technologiczna
    sposób działania przedsiębiorstwa
    przedsiębiorstwo średniej wielkości
    Opis:
    Background: Enterprise Resource Planning (ERP) is a method of using computer system technology to integrate all functions in various departments, such as marketing, inventory control, accounting and human resource across an entire company. ERP system intends to facilitate information sharing, business planning, and decision making in enterprises organization. This study proposes a theoretical framework that will determine the factors affecting ERP system adoption among medium-sized enterprise firms based on a case study. Methods: This present study applied resource based value and contingency theories to explain the factors that affect ERP system adoption and firm's performance. The study proposes a framework which was prepared on the basis of results obtained from the questionnaire research. The specially prepared questionnaire was distributed to 217 companies of various medium sizes, located in Oyo State, Nigeria. CEO / MD and managers were selected as the key respondents of the questionnaire. After the completion of data collection, the empirical data were analyzed using the Partial Least Squares Structural Equation modelling. Results: The result reveals that organizational structure and technological change have a significant influence on the adoption of the ERP system to improve the performance of medium size enterprise firms. In this regard, the effectiveness of ERP system adoption would strongly affect a firm's performance. Conclusions: This paper proposes an enhanced theoretical framework that examines the vital issues concerning ERP system factors of adoption, thus, providing valuable outcomes for medium-sized enterprise firms. The originality of the paper is supported by its three-dimensional approach.
    Wstęp: ERP (Enterprise Resource Planning) jest metodą stosująca komputerowe systemy do zintegrowania wszystkich funkcji różnych działów przedsiębiorstwa, takich jak marketing, logistyka, księgowość i zarządzanie zasobami ludzkimi. System ERP ułatwia dzielenie się informacjami, planowanie działań przedsiębiorstwa oraz proces podejmowania decyzji biznesowych w obrębie organizacji przedsiębiorstwa. W prezentowanej pracy został zaproponowany schemat ramowy określający czynniki determinujące i wpływające na wdrożenie systemu ERP w średnich przedsiębiorstwach w oparciu o przeprowadzone studium przypadku. Metody: W pracy zastosowano teorię wartości i przypadkowości w celu wyjaśnienia czynników wpływających na pozytywne wdrożenie systemu ERP w przedsiębiorstwie. Dane potrzebne do analizy zostały zebrane w trakcie badania ankietowego. Specjalnie przygotowane w tym celu kwestionariusze zostały przekazane do 217 przedsiębiorstw średniej wielkości, zlokalizowane w stanie Oyo w Nigerii. Osoby szczebla zarządzającego byli wybrani jako główni odbiorcy tej ankiety. Dane zebrane w ten sposób poddano następnie analizie statycznej przy użyciu modelu częściowych najmniejszych kwadratów. Wyniki: Dane uzyskane podczas badania wskazują, że struktura organizacyjna ma istotny wpływ na pozytywne wdrożenie systemu ERP poprzez wzrost efektywności działania firm. Również istotny wpływ na pozytywne wdrożenie systemu ERP i w konsekwencji wzrost efektywności działania firmy ma zmiana technologiczna. Wnioski: W pracy zaprezentowano teoretyczne ramy badania wpływu różnych czynnik na pozytywne wdrożenie system ERP w przedsiębiorstwach średniej wielkości, co przekłada się na wzrost ich efektywności działania. Nowością pracy jest trójwymiarowe podejście do analizy.
    Źródło:
    LogForum; 2018, 14, 2; 245-255
    1734-459X
    Pojawia się w:
    LogForum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of Trichoderma Hamatum for Biocontrol of Lentil Vascular Wilt Disease: Efficacy, Mechanisms of Interaction And Future Prospects
    Autorzy:
    El-Hassan, S.A.
    Gowen, S.R.
    Pembroke, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/65520.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Trichoderma hamatum (Bonord.) Bainier was evaluated for its antagonistic potential against Fusarium oxysporum Schlecht. emend. Snyder and Hansen sp. lentis, the causal agent of vascular wilt disease of lentil (Lens culinaris Medikus). Hyphal interactions on Petri plates resulted in an increase in the number of conidial spores and an increase in the vegetative growth of T. hamatum, and a decrease in the hyphal formation and sporulation of F. oxysporum f. sp. lentis. Electron and light microscopical observations suggested that hyphae of T. hamatum established aggressive contact and attachment with the hyphae of the pathogen. Growing in parallel, coiled densely and tightly, T. hamatum may penetrate those of the pathogen hyphae causing collapse due to the loss of turgor pressure. The cellulolytic enzymes produced by T. hamatum presented sufficient characteristics for its antifungal activity in the hyphae hydrolysis and competition process. In growth room and glasshouse experiments, the addition of the conidial suspension of T. hamatum or its culture filtrate to soil, significantly (p ≤ 0.05) reduced development and spore germination of F. oxysporum. In the rhizosphere, T. hamatum occupied the same ecological niches (rhizosphere, roots, and stems) parasitizing F. oxysporum f. sp. lentis. Treatments using T. hamatum delayed the time of infection by F. oxysporum, promoted the growth, and increased the dry weight of a susceptible variety of lentil (cv. Precoz). The percent of mortality was reduced to 33 and 40% when using T. hamatum and its filtrate, respectively, compared to 93% in the control treatment during the 65 days of growing in loam/sand (2:1 vol/vol) under glasshouse conditions. Plant colonization results indicate that T. hamatum and its filtrate significantly (p ≤ 0.05) reduced development of the pathogen in the vascular tissue of lentil to < 30 and < 40% stem colonization, respectively, compared to 100% in the plant pathogen control. Our results suggest that potential biocontrol mechanisms of T. hamatum towards F. oxysporum f. sp. lentis were antibiosis by production of antifungal enzymes, complex mechanisms of mycoparasitism, competition for key nutrients and/or ecological niches, growth promotion, and a combination of these effects. This study results hold important suggestions for further development of effective strategies of the biological control of Fusarium vascular wilt of lentil.
    Źródło:
    Journal of Plant Protection Research; 2013, 53, 1
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Does Hausa Really Have Infixation?
    Autorzy:
    Al-Hassan, Bello S.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/969749.pdf
    Data publikacji:
    2011-12-10
    Wydawca:
    Uniwersytet Warszawski. Wydział Orientalistyczny. Katedra Języków i Kultur Afryki
    Tematy:
    infixation
    Hausa language
    Opis:
    Hausa is often indicated with the three most common types of affix, viz. prefix, infix and suffix. Whereas the availableness of prefixes and suffixes in the language is not in doubt, that of infixes may have resulted from erroneous perspectives. The so-called infixes in Hausa are, in truth, a relay of suffixes that became obscured by phonology or deletion, envisaged parallactically as infixation. In two other instances, infixation either arose as a simple case of unscrupulous use of terminology or was established on a seemingly irrelevant premise, namely the non-occurrence of a tonal phenomenon. Conclusively, the existence of infixation in Hausa is extra-evidential, and therefore questionable.
    Źródło:
    Studies in African Languages and Cultures; 2011, 45; 7-21
    2545-2134
    2657-4187
    Pojawia się w:
    Studies in African Languages and Cultures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Induction of hemolysis and eryptosis by occupational pollutant nickel chloride is mediated through calcium influx and p38 MAP kinase signaling
    Autorzy:
    Alfhili, Mohammad A.
    Alamri, Hassan S.
    Alsughayyir, Jawaher
    Basudan, Ahmed M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085691.pdf
    Data publikacji:
    2022-02-15
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    calcium
    p38 MAPK
    oxidative stress
    hemolysis
    nickel
    eryptosis
    Opis:
    ObjectivesNickel (Ni) is an abundant environmental hazard and an occupational pollutant. Exposure to Ni compounds is prevalent in electroplating workers and in the printing industry, among others. The toxicity of Ni manifests as dermatological, gastrointestinal, respiratory, allergic, and cardiovascular symptoms. In particular, hyperbilirubinemia and reticulocytosis have been detected in intoxicated subjects; an observation possibly implicating selective red blood cell (RBC) toxicity. Herein, the interaction of nickel chloride (NiCl2) with human RBCs and associated molecular mechanisms are described.Material and MethodsCells from healthy donors were incubated for 24 h at 37°C in the presence or absence of 0.5‒10 mM of NiCl2, and cytotoxicity was determined through hemoglobin leakage by colorimetry under different experimental conditions. Eryptotic markers were also identified by flow cytofluorometry using Annexin-V-FITC tagging for phosphatidylserine (PS) exposure, light scatter properties for cellular dimensions, Fluo4/AM labeling for intracellular calcium, and H2DCFDA staining for reactive oxygen species (ROS). Additionally, small molecule inhibitors were used to probe the signaling pathways involved.ResultsIt was found that NiCl2 at 10 mM caused profound intracellular calcium overload and significant calcium-dependent hemolysis. Also, NiCl2 reduced forward scatter and increased side scatter, Annexin-positive cells, and ROS levels. Importantly, NiCl2-induced hemolysis was significantly attenuated by the exclusion of extracellular calcium, and in the presence of p38 MAP kinase (MAPK) inhibitor SB203580.ConclusionsIt is concluded that NiCl2 induces p38 MAPK-dependent hemolysis, and stimulates the canonical features of premature eryptosis. This report presents the first description of the molecular mechanisms underlying the hemolytic and eryptotic potential of NiCl2 and, thus, may explain changes in hematological parameters observed in poisoning victims.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2022, 35, 1; 1-11
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transfixation in Hausa: A Hypothetical Analysis
    Autorzy:
    Al-Hassan, Bello S.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/969756.pdf
    Data publikacji:
    2011-12-10
    Wydawca:
    Uniwersytet Warszawski. Wydział Orientalistyczny. Katedra Języków i Kultur Afryki
    Tematy:
    Transfixation
    Hausa language
    Opis:
    The paper deals with the non-contiguous morphs in Hausa which are regarded as the manifestation of transfixation. Transfixation is an Afroasiatic feature that is apparent in Arabic. In the present publication it is also claimed to be evident in Hausa. The similarities between Arabic and Hausa are obvious in such linguistic phenomena as tri-literacy, the upgrading of aberrant roots and the existence in both languages of what are denominated here reduplicative and non-reduplicative transfixations. Transfixation in Hausa differentiates itself from its Arabic counterpart via vowel retention and external transfixation which makes the transfix liable to analysis as suffix in the manner of Newman (2000). But the chief contradistinguishing feature is the non-contiguity principle which establishes the affix as the critical component in the Hausa broken morphology.
    Źródło:
    Studies in African Languages and Cultures; 2011, 45; 39-58
    2545-2134
    2657-4187
    Pojawia się w:
    Studies in African Languages and Cultures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regression Model for the Bagging Fatigue of Knitted Fabrics Produced from Viscose/Polyester Blended Rotor Yarns
    Model regresji dla oceny wypychania dzianin wykonanych z rotorowych przędz mieszankowych
    Autorzy:
    Hasani, H.
    Hassan Zadeh, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/232596.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    trykot
    struktura tkaniny
    parcianka
    eksperymentalne wzornictwo
    mieszane przędze
    knitted fabric
    fabric structure
    bagging
    experimental design
    blended yarns
    Opis:
    The aim of this work was to predict the bagging fatigue percentage of knitted fabrics produced from viscose/polyester blended rotor yarns using blend ratios and structural cell stitch lengths as predictor variables. A simplex lattice design was used to determine the combinations of blend ratios of the fibre types. Knitted fabrics with three different structures were produced from viscose/polyester blended rotor yarns. Mixture-process crossed regression models with two mixture components and one process variable (structural cell stitch lengths, blend ratio) were built to predict the bagging fatigue percentage. All statistical analysis steps were implemented using Design-Expert statistical software. The correlation coefficient between the bagging fatigue percentage predicted and the bagging fatigue percentage observed was 0.983, indicating the strong predictive capability of the regression model built.
    Badano wypychanie dzianin wykonanych z wiskozowo-poliestrowych mieszankowych przędz rotorowych. Jako wielkości wejściowe przyjęto procentowy udział włókien w mieszankach splotu. Zastosowano konstrukcję sympleksu dla określenia kombinacji stosunku składników przędzy mieszankowej. Wyprodukowano trzy rodzaje dzianin przy użyciu rożnych mieszanek przędz, utworzono model regresji zawierający dwa składniki mieszanki i jedną zmienną procesu - długość splotu dziewiarskiego. Przeprowadzono analizę statystyczną przy wykorzystaniu programu Design-Expert. Uzyskano bardzo dobrą zgodność pomiędzy wartościami przewidywanymi i pomierzonymi, współczynnik korelacji wynosił 0.983.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2012, 4 (93); 67-71
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urban planning of Khartoum. History and modernity Part II. Modernity
    Urbanistyka Chartumu. Historia oraz współczesność. Część II. Współczesność
    Autorzy:
    Hassan, S.S.
    Kobylarczyk, J.
    Kuśnierz-Krupa, D.
    Chałupski, A.
    Krupa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/218374.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Konserwatorów Zabytków
    Tematy:
    Africa
    Sudan
    Khartoum
    structural development
    urban sprawl
    density of urban tissue
    squat
    slums
    migrations
    African modernism
    Doxiadis
    McLean
    British colony
    social segregation
    Afryka
    rozwój strukturalny
    zagęszczenie tkanki miejskiej
    slumsy
    migracje
    modernizm afrykański
    Doxiadis McLean
    kolonia brytyjska
    segregacja społeczna
    Opis:
    The cosmopolitan centre of Khartoum, built in order to meet the requirements of the British residing there in isolation, was a concept realising the planning vision of a contemporary metropolitan city created on the level differing from the twentieth-century urban-planning principles of the West. Branching off, according to a meticulously planned and controlled scheme, the orthogonal grid of Khartoum with its opposite, chaotic Umm-durman on the other bank of the Nile, within half a century of their existence became proof of the phenomenon which, even today, might be regarded as a utopia. Free from tension, full of cultural contrasts and class differences, the capital of Sudan did not escape the touch of premature old age. A period of prosperity, known from old postcards and sentimental stories, was replaced with another utopia whose vision did not survive the clash with reality. In the second part of work concerning the history and urban development of Khartoum, the Authors presented issues concerning the realisation of urban-planning visions from the 1st and 2nd half of the 20th century. They also drew attention to their consequences and the fact that they constitute a signifi cant legacy for the current generation of urban planners.
    Kosmopolityczne centrum Chartumu, zbudowane aby sprostać wymaganiom rezydujących tam w izolacji Brytyjczyków, było koncepcją realizującą planistyczną wizję współczesnego miasta metropolitalnego stworzonego na poziomie nieodbiegającym od dwudziestowiecznych założeń urbanistycznych Zachodu. Rozgałęziająca się według ściśle zaplanowanego i kontrolowanego schematu, ortogonalna siatka Chartumu wraz z zaprzeczającym jej, chaotycznym Umm-durmanem po drugiej stronie Nilu stały się w ciągu półwiecza istnienia dowodem fenomenu, który nawet dziś mógłby być uznany za utopię. Wolna od napięć, pełna kulturowych kontrastów i różnic klasowych stolica Sudanu nie uniknęła dotyku przedwczesnej starości. Czas dobrobytu znany dziś ze starych pocztówek i sentymentalnych opowieści zastąpił czas innej utopii, której wizja nie zniosła zderzenia z rzeczywistością. W drugiej części pracy dotyczącej historii rozwoju urbanistycznego Chartumu autorzy przedstawili problemtykę dotyczącą realizacji wizji urbanistycznych z I i II połowy XX wieku. Zwrócili również uwagę na ich skutki i fakt, że stanowią istotną spuściznę dla współczesnej generacji planistów.
    Źródło:
    Wiadomości Konserwatorskie; 2017, 52; 140-148
    0860-2395
    2544-8870
    Pojawia się w:
    Wiadomości Konserwatorskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nickelization Effect on the High Temperature Tensile Properties of Mg-0.7Y2O3 Nanocomposite
    Autorzy:
    Hassan, S. F.
    Tun, K. S.
    Patel, F.
    Al-Aqeeli, N.
    Gupta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/357046.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium
    nanocomposite
    high-temperature
    tensile strength
    deformation
    Opis:
    In this study, high performance magnesium-yttria nanocomposite’s room temperature, strength and ductility were significantly enhanced by the dispersion of nano-sized nickel particles using powder blending and a microwave sintering process. The strengthening effect of the dispersed nano-sized nickel particles was consistent up to 100°C and then it gradually diminished with further increases in the test temperature. The ductility of the magnesium-yttria nanocomposite remained unaffected by the dispersed nano-sized nickel particles up to 100°C. Impressively, it was enhanced at 150°C and above, leading to the possibility of the near net shape fabrication of the nanocomposite at a significantly low temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1411-1415
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study of 2DOF PID and 2DOF fractional order PID controllers on a class of unstable systems
    Autorzy:
    Bingi, K.
    Ibrahim, R.
    Karsiti, M. N.
    Hassan, S. M.
    Harindran, V. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/229519.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional order controller
    set-point weighting
    2DOF PID
    process control
    unstable systems
    Opis:
    The proportional-integral-derivative (PID) controllers have experienced series of structural modifications and improvements. Example of such modifications are set-point weighting and fractional ordering. While the former is to achieve two-degree-of-freedom (2DOF) ability of set-point tracking and disturbance rejection, the latter is to ensure smooth control action. Therefore, this paper reviews various forms of PID controllers and provides a comparative analysis of 2DOF PID and 2DOF fractional order PID (FOPID) controllers. The paper also discusses the conversion of one PID form to another. For the comparative analysis of the various controllers, a class of unstable systems are considered. Simulation result shows that in most cases the conversion from one form to another does not significantly affect the performance of the system. It is also observed that the 2DOF controllers (2DOF PID and 2DOF FOPID) improved significantly the performance of the ordinary PID controllers.
    Źródło:
    Archives of Control Sciences; 2018, 28, 4; 635-682
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relation between CO2 emissions and crude oil combustion in Iraq
    Autorzy:
    Hassan, Ahmed S.
    Azeez, Hasan M.
    Powiązania:
    https://bibliotekanauki.pl/articles/35540085.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    CO2 emission
    crude oil
    CO2 concentration
    Iraq
    Opis:
    Fossil fuel is the main source for CO2 emissions that causes global warming. This fact is the starting point for this paper, that consider on three different sources of data: crude oil used to calculate CO2 emissions for Iraq for the period from 1980 to 2018; annual data of total CO2 emissions available from the Carbon Dioxide Information Analysis Center (CDIAC) for Iraq and the world for the period from 1980 to 2014; and CO2 concentrations for Iraq for the period from 2002 to 2006 and for the world for the period from 1980 to 2018. The result is a multifaceted according to the dataset sources. Carbon dioxide emissions calculated from Iraqi crude oil was increased from 1.29 Mt in 2012 to 1.97 Mt in 2018. The world and Iraq CO2 emissions with different slop of average line that was 0.5 for world, 0.003 for Iraq, while increased exponential function from 2008 to 2014 to reach 36 and 0.17 Mt, respectively. The highest value of Iraqi CO2 concentration was 403 ppm in 2016, while the global CO2 concentrations slowly increased with slop line equal to 1.75 ppm per year, from minimum value of 338.6 ppm was in 1980, while maximum value of 407.05 ppm was in 2018, that’s mean no decreased in CO2 concentration unless emissions addressed.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2021, 30, 3; 379-387
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    NADPH oxidase mediated ROS control susceptibility of Arabidopsis plants to a parasite
    Autorzy:
    Siddique, S.
    Matera, C.
    Hassan, S.
    Sobczak, M.
    Rozanska, E.
    Gutbrod, P.
    Grundler, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/81102.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    NADPH oxidase
    reactive oxygen species
    pathogen infection
    programmed cell death
    plasma membrane
    plant-pathogen interaction
    parasitic nematode
    Arabidopsis
    plant parasite
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    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
    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:
    The pulmonary involvement in Theileria lestoquardi naturally infected sheep
    Autorzy:
    El Imam, A.H.
    Hassan, S.M.
    Gameel, A.A.
    El Hussein, A.M.
    Taha, K.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/6255.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    Malignant Ovine Theileriosis (MOT) caused by Theileria lestoquardi is considered a major constraint for sheep production in many areas of the world including Sudan. Pulmonary oedema is thought to be the main cause of animal death, but the mechanism, the cell types involved and/or the probable cause of this pneumonia has yet to be defined. The present study was carried out to investigate the pulmonary involvement post T. lestoquardi infection and to identify the cell types involved in pneumonia. Apparently healthy sheep were exposed to ticks challenge in T. lestoquardi endemic area. Lungs impression smears and tissue sections for histopathology were processed. At necropsy, fifteen infected sheep revealed severe pneumonia associated with oedema and accumulation of creamygrayish frothy exudates. The microscopic findings of examined lungs showed emphysema, congestion, collapse and proliferation of immense amount of different kinds of cells. The current study indicates that T. lestoquardi infections are accompanied with remarkable pulmonary involvements and may lead to respiratory failure and death.
    Źródło:
    Annals of Parasitology; 2016, 62, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameter estimation of exponentiated exponential distribution under selective ranked set sampling
    Autorzy:
    Hassan, Amal S.
    Elshaarawy, Rasha S.
    Nagy, Heba F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2156898.pdf
    Data publikacji:
    2022-12-15
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    exponentiated exponential distribution
    partial ranked set sampling
    neoteric ranked set sampling
    maximum likelihood method
    Opis:
    Partial ranked set sampling (PRSS) is a cost-effective sampling method. It is a combination of simple random sample (SRS) and ranked set sampling (RSS) designs. The PRSS method allows flexibility for the experimenter in selecting the sample when it is either difficult to rank the units within each set with full confidence or when experimental units are not available. In this article, we introduce and define the likelihood function of any probability distribution under the PRSS scheme. The performance of the maximum likelihood estimators is examined when the available data are assumed to have an exponentiated exponential (EE) distribution via some selective RSS schemes as well as SRS. The suggested ranked schemes include the PRSS, RSS, neoteric RSS (NRSS), and extreme RSS (ERSS). An intensive simulation study was conducted to compare and explore the behaviour of the proposed estimators. The study demonstrated that the maximum likelihood estimators via PRSS, NRSS, ERSS, and RSS schemes are more efficient than the corresponding estimators under SRS. A real data set is presented for illustrative purposes.
    Źródło:
    Statistics in Transition new series; 2022, 23, 4; 37-58
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study the internal cracks effect on vibration of laminated composite square plates
    Autorzy:
    Hassan, M.S.
    Rashid, Z.H.
    Sarhan, R.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200571.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    laminate plate
    natural frequency
    boundary condition
    cracked plate
    finite element
    ANSYS
    płyta laminowana
    częstotliwość drgań własnych
    warunek brzegowy
    pęknięta płyta
    element skończony
    Opis:
    Purpose: The study of cracks behaviour in a composite plate is of significant importance in the dynamics of the Mechanical parts in order to avoid design failures due to resonance or high amplitude vibrations. Design/methodology/approach: In this paper, a square glass-epoxy composite plate is adopted. The plate has four layers with symmetric and asymmetric lamination. Assuming the cracks are profound as defects. The results were obtained by using a numerical solution of mechanical APDL from ANSYS. Findings: It has been found for different boundary conditions that the rank of natural frequencies is decreased by increasing the crack ratio due to the reduction of the plate’s stiffness, whereas the crack direction has no mentioned effect for a small angle of rotation. Research limitations/implications: The accuracy of results is verified by comparing a single case of the current work with other previous investigations. value: Evaluate the influence of the crack length ratio, angle of the crack rotation, boundary conditions and lamination angles on the natural frequencies of the square composite plate with glass-epoxy materials.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 116, 1; 28--33
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical Properties and Estimation of Power-Transmuted Inverse Rayleigh Distribution
    Autorzy:
    Hassan, Amal S.
    Assar, Salwa M.
    Abdelghaffar, Ahmed M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058930.pdf
    Data publikacji:
    2020-09-04
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    percentiles
    Opis:
    A three-parameter continuous distribution is constructed, using a power transformation related to the transmuted inverse Rayleigh (TIR) distribution. A comprehensive account of the statistical properties is provided, including the following: the quantile function, moments, incomplete moments, mean residual life function and Rényi entropy. Three classical procedures for estimating population parameters are analysed. A simulation study is provided to compare the performance of different estimates. Finally, a real data application is used to illustrate the usefulness of the recommended distribution in modelling real data.
    Źródło:
    Statistics in Transition new series; 2020, 21, 3; 93-107
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approaching of May maximum surface air temperature to characteristic summer season for Baghdad city
    Autorzy:
    Muter, Sara A.
    Kadhum, Jasim H.
    Hassan, Ahmed S.
    Powiązania:
    https://bibliotekanauki.pl/articles/35539647.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    maximum air temperature
    summer season
    May
    Baghdad
    Opis:
    Seasonal variability is the complex non-linear response of the physical climate system. There are two types of natural variability: those external and internal to the climate system. In any given season, natural variability may cause the climate to be different than its long-term average. This study examines with the seasonal variation of the maximum temperatures during the summer season. In addition, the maximum temperatures in May become close to the characteristics of the summer season. The monthly data for maximum temperature of May, June and July were used from Iraqi Meteorological Organization and Seismology (IMOS) for 47 years from 1970 to 2017 for Baghdad city. This period was long enough to estimate the range of approaching maximum temperature (Tmax) May to summer. Results revealed a significant Tmax for Baghdad during the second period (1992–2017) and ?shown similar behavior of Tmax in May to June and July; on the contrary that first period (1970–1991). In second period, two phases have been found out, positive phase and negative phase. The positive phase were happened in 1995, 1999, and 2006, and the negative phase was four cases (1992, 2004, 2013, and 2016), while a few cases recorded in first period. The amplitudes of monthly variability had same distance of leaner correlation especially in 1999 and 2013 that represent coherent wave with summer seasons. The variance difference for Tmax between May and June approximately was 2°C for second study’s period, while exceed this range in first period. This variance change to 7.5°C when found difference between July and May.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2021, 30, 3; 400-410
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular identification of different Theileria and Babesia species infecting sheep in Sudan
    Autorzy:
    El Imam, A.E.
    Hassan, S.M.
    Gameel, A.A.
    El Hussein, A.M.
    Taha, K.M.
    Oosthuizen, M.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/5972.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    The epidemiological aspects of sheep piroplasmosis in Sudan are poorly studied, and further investigations using sensitive and precise techniques are required. In this study, the Reverse Line Blot (RLB) hybridization assay was used to detect and simultaneously differentiate between Theileria and Babesia species. DNA was extracted from blood collected on filter paper (n=219) from apparently healthy sheep from six different geographical localities in Sudan. Results indicated that Theileria ovis (88.6%), T. separata (20.1%), T. lestoquardi (16.4%) and T. annulata (16.4%) DNA could be detected in the blood samples. Single and mixed Theileria infections were detected in 74 (33.8%) and 124 (56.6%) respectively and T. ovis being the most prevalent species in the country. T. ovis and T. separata were reported for the first time in sheep in Sudan.
    Źródło:
    Annals of Parasitology; 2016, 62, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of a CDMA wireless local loop systems
    Autorzy:
    Hassan, E. S.
    El-Dolil, S. A.
    Dessouky, M. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/378461.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
    Opis:
    In this paper, the capacity of the Code Division Multiple Access Wireless Local Loop (CDMA WLL) sysytem is analytically derived, and the capacity gain achieved in a CDMA WLL over a cellular mobile environment is calculated. The results show that the CDMA WLL system can support up to 36% more users than CDMA cellular mobile system. The paper also propose a new approach to increase the reverse lonk capacity of the CDMA WLL system, which synchronize the reverse link so that signals transmitted from different subscriber units within the same cell are time aligned at the base station )BS). A theoretical analysis of the potential capacity gain of reverse link synchronous CDMA WLL is presented.
    Źródło:
    Electron Technology : Internet Journal; 2005-2006, 37/38, 3; 1-7
    1897-2381
    Pojawia się w:
    Electron Technology : Internet Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the density and cumulative distribution functions of the exponentiated Burr XII distribution
    Autorzy:
    Hassan, Amal S.
    Assar, Salwa M.
    Ali, Kareem A.
    Nagy, Heba F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1917020.pdf
    Data publikacji:
    2021-12-08
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    exponentiated Burr Type XII model
    least squares estimator
    maximum likelihood estimator
    uniform minimum variance unbiased estimator
    weighted least squares estimator
    Opis:
    The exponentiated Burr Type XII (EBXII) distribution has wide applications in reliability and economic studies. In this article, the estimation of the probability density function and the cumulative distribution function of EBXII distribution is considered. We examine the maximum likelihood estimator, the uniformly minimum variance unbiased estimator, the least squares estimator, the weighted least squares estimator, the maximum product spacing estimator, the Cramér–von-Mises estimator, and the Anderson–Darling estimator. We derive analytical forms for the bias and mean square error. A simulation study is performed to investigate the consistency of the suggested methods of estimation. Data relating to the wind speed and service times of aircraft windshields are used with the studied methods. The simulation studies and real data applications have revealed that the maximum likelihood estimator performs more efficiently than its remaining counterparts.
    Źródło:
    Statistics in Transition new series; 2021, 22, 4; 171-189
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    How do Mentha plants induce resistance against Tetranychus urticae (Acari: Tetranychidae) in organic farming?
    Autorzy:
    Allam, S.F.
    Soudy, B.A.-N.
    Hassan, A.S.
    Ramadan, M.M.
    Baker, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/65704.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mentha
    Mentha piperita
    Mentha viridis
    spearmint
    garden mint zob.spearmint
    common mint zob.spearmint
    lamb mint zob.spearmint
    mackerel mint zob.spearmint
    plant resistance
    ecology
    high performance liquid chromatography
    Tetranychus urticae
    Acari
    Tetranychidae
    Opis:
    Tetranychus urticae (Acari: Tetranychidae) infesting many plants but Mentha viridis L., and Mentha piperita L., were low in number of infestation. Therefore the objective of this study was to identify the resistance of M. viridis and M. piperita plants against T. urticae by studying the external shape and internal contents of those plants. For morphological studies, dried leaves were covered with gold utilizing an Edwards Scan coat six sputter-coater. For histological studies, arrangements of Soft Tissue technique were used. For phytochemical studies, the plants were cut, dried and then high performance liquid chromatography (HPLC) was used. While feeding the mites were collected from the area between oily glands, trichomes and respiratory stomata in both mint species. The most important leaf structures in aromatic plants are the oily glands found on the external part of the leaves (both upper and lower epidermis). The number of oil glands in M. viridis leaves was greater than in M. piperita; the trichomes on the epidermis of M. viridis were greater in number than in M. piperita; the spongy mesophyll in M. viridis was much thicker than in M. piperita. The essential oils in the leaves of both mint species contained 71 compounds representing 99.61% of the total oil constituents identified from M. viridis before infestation, and 90.95% after infestation, and about 99.65% from M. piperita before infestation, and 99.98% after infestation.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 3
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of tropospheric NO2 over Iraq using OMI satellite measurements
    Autorzy:
    Rajab, Jasim M.
    Hassan, Ahmed S.
    Kadhum, Jasim H.
    Al-Salihi, Ali M.
    San Lim, Hwee
    Powiązania:
    https://bibliotekanauki.pl/articles/118650.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    nitrogen dioxide
    air pollution
    remote sensing
    Baghdad
    Iraq
    Opis:
    Tropospheric nitrogen dioxide (NO2) is a trace gas with important impact on atmospheric chemistry, human health and a key pollutant in particular cities, measured from space since the mid-1990s by the GOME, SCIAMACHY, OMI, and GOME-2 instruments. This study present ten years (monthly and yearly averaged) dataset from Ozone Monitoring Instrument (OMI) used to investigate tropospheric NO2 characteristics and variations over Iraq during 2005–2014. Annual NO2 shows an elevation from the northern to the southern and highest values was at central parts of Iraq. Monthly distributions revels higher values NO2 in winter and summer than spring and autumn seasons, and rising NO2 throughout study period over industrial and crowded urban zones. The trend analysis over Baghdad shows a linear growth rate 9.8% per year with an annual average (5.6·1015 molecules per 1 cm2). The air mass trajectory analysis as hotspot regions shows seasonal fluctuations between winter and summer seasons depend on weather conditions and topography. The increased NO2 values in winter are due to anthropogenic emissions and subsequent plumes from Europe. In addition, in summer because of hot weather and large paddy fields emissions. The lowest NO2 value was at monsoon period mostly linked to the rains. The OMI data and satellite information are able to observe the troposphere NO2 elevation at different regions.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2020, 29, 1; 3-16
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt
    Autorzy:
    El-Sayed, Samah
    Abdel-Khalek, N. A.
    El-Shatoury, E. H.
    Abdel-Motelib, A.
    Hassan, M. S.
    Abdel-Khalek, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1845207.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    gold
    mineralogy
    petrography
    gravity separation
    Falcon concentrator
    Opis:
    El-Hudi gold deposit, located in the South Eastern Desert of Egypt, represent large vein- type gold occurrence. The representative sample revealed the abundance of quartz as main constituent with minor amounts of mineral impurities. Gold was detectable (12 g/t) as determined using atomic absorption. The petrographic study revealed that the gold grains ranged from 10-40 μm. The grain boundaries of quartz are highly stained with iron minerals as hematite and limonite. Sericite mineral is common in discrete gold-bearing veins. Eroded pyrite was detected with high alteration leaving only cubic-shaped cavities behind. Different techniques for gravity separation were used to separate gold from the quartz mineral. After crushing and grinding of the sample, shaking table was used to upgrade the coarser fractions while Falcon concentrator was employed to upgrade the fine fraction. The best concentrate was obtained through grinding the whole sample to less than 0.2 mm, followed by cleaning steps. The gold content is increased from 12 to 145 g/t with total recovery of 78%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 839-848
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of probiotic and yeast culture supplementation on selected biochemical and immunological parameters of growing lambs
    Autorzy:
    Mahmoud, M.M.
    Youssef, I.M.I.
    Abd El-Tawab, M.M.
    Bakr, H.A.
    Eissa, N.A.
    Hassan, M.S.
    Giadinis, N.D.
    Milewski, S.
    Baumgartner, W.
    Sobiech, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087359.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lambs
    probiotic
    yeast culture
    Saccharomyces cerevisiae
    immunoglobulins
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 1; 5-12
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel application of building demolition waste for removal benzene from aqueous solutions
    Autorzy:
    Alquzweeni, Saif S.,
    Hassan, Afrah A.
    Alkizwini, Rasha S.
    Powiązania:
    https://bibliotekanauki.pl/articles/35515684.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    building demolition waste
    benzene
    equilibrium
    FTIR analysis
    Opis:
    A novel application of building demolition waste for removal benzene from aqueous solutions. In this research, demolition waste from buildings has been studied for possible use as benzene removal adsorbent from aquatic solution. The effect of adsorbent dosage, contact time, initial benzene concentration, and initial pH on benzene adsorption capacity have been investigated in the batch adsorption experiments. The adsorption effects initially happened very rapidly and achieved equilibrium within 180 min. Benzene removal was observed to decrease by an increase in the initial concentration of benzene of 300–700 mg·L–1, an increase in the adsorbent dose of 0.4–2.4 g per 100 mL, where an optimum adsorbent dose equal to 1.2 g per 100 mL was found. The potential of adsorption increases with pH 3.0–7.0 to reach the maximum removal efficiency at pH 6.0. The findings showed that equilibrium data were adequately adapted and correlated with the Freundlich isotherm models. The average percentage of the removal at room temperature was about 98%. Results suggest that building demolition waste can be used effectively in industrial wastewater treatment for the removal of aromatic hydrocarbon, benzene, as a low-cost option.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2021, 30, 1; 86-97
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supplemental effects of silicon nutrition on growth, quality and some physiological characters of potted chrysanthemum grown in greenhouse
    Suplementacyjny wpływ żywienia krzemem na wzrost, jakość i niektóre cechy fizjologiczne doniczkowych chryzantem uprawianych w szklarni
    Autorzy:
    Ali, E.F.
    Hassan, F.A.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543323.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    supplementation effect
    silicon
    membrane stability
    plant growth
    plant quality
    plant physiology
    pot chrysanthemum
    chrysanthemum
    greenhouse
    Opis:
    Potted chrysanthemum is one of the most important floriculture plants which commercially produced in greenhouses where silicon (Si) is available in limited concentration because of using several substrates as growing media. Therefore, this study was conducted to investigate the supplemental effects of Si nutrition on growth, flowering, flower longevity as well as shelf life and nutrients content of potted chrysanthemum in relation to Si application. Moreover, the effects of Si treatment on some physiological parameters i.e. chlorophyll content, stomatal resistance, membrane stability index (MSI) and total carbohydrates were also investigated. Si application as K₂SiO₃ was added whether as foliar application at 25, 75 and 125 mg L⁻¹ Si or soil drenches at 50, 100 and 150 mg L⁻¹ Si. Except plant height and leaf area, the other vegetative growth and flowering characters were improved as a result of both Si supplementation methods compared with untreated control. Flowering was earlier and shelf life was longer in Si-supplemented than nonsupplemented plants. Generally, Si application increased the macro and micronutrients concentrations (except Ca) estimated in this study. Chlorophyll content, stomatal resistance, MSI and total carbohydrates were increased among Si treated plants. Improving the floricultural traits, extending longevity and shelf life of greenhouse grown chrysanthemum may give an impact of its greenhouse commercial production if appropriate level was used.
    Chryzantema doniczkowa to jedna z najważniejszych roślin, które są komercyjnie produkowane w szklarniach, gdzie krzem (Si) jest dostępny w ograniczonym stężeniu, gdyż do uprawy używane są różne podłoża. Niniejsze badanie przeprowadzono w celu zbadania skutków suplementacyjnych żywienia Si na wzrost, kwitnienie, długość życia kwiatów, a także żywotność i zawartość składników odżywczych chryzantemy doniczkowej w stosunku do aplikacji Si. Ponadto zbadano skutki zabiegów z użyciem Si na niektóre parametry fizjologiczne, to znaczy zawartość chlorofilu, działanie aparatów szparkowych, wskaźnik stabilności błon (MSI) oraz całkowitą zawartość węglowodanów. Zastosowanie Si w postaci K₂SiO₃ dodano jako aplikację dolistną w ilości 25, 75 i 125 mg L⁻¹ Si lub do podłoża przy 50, 100 i 150 mg L⁻¹ Si. Z wyjątkiem wysokości roślin i obszaru liścia, w porównaniu z kontrolą bez żadnych zabiegów, wszystkie cechy wzrostu i kwitnienia polepszyły się w wyniku zastosowania obu metod suplementacji. Kwitnienie było wcześniejsze, a żywotność dłuższa u roślin z suplementacją Si niż u roślinach bez suplementacji. Generalnie zastosowanie Si zwiększało stężenie makro- i mikroskładników (z wyjątkiem Ca) ocenianych w niniejszym badaniu. Zawartość chlorofilu, działanie aparatów szparkowych, MSI oraz całkowita zawartość węglowodanów zwiększały się wśród roślin z zastosowaniem Si. Polepszenie cech kwiatowych, zwiększenie długości życia i żywotności chryzantem hodowanych w szklarni może mieć wpływ na komercyjną produkcję szklarniową, jeśli zastosuje się jego odpowiedni poziom.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 4; 85-98
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of silymarin content in cell cultures of Silybum marianum by copper sulphate elicitor
    Autorzy:
    Elsharnouby, M.E.
    Hassan, F.A.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11893796.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    milk thistle
    Silybum marianum
    herbal plant
    medicinal plant
    cell culture
    silymarin
    copper sulphate
    Opis:
    Silybum marianum L. (Milk thistle) extracts are the main source of silymarin that is a mixture of various flavonolignan (silybin (silibinin), silydianin and silychristin). Silymarin of milk thistle has a hepatoprotective activity for liver cirrhosis and chronic inflammatory. Silybum marianum regeneration from hypocotyl explants and evaluation of their callogenesis, growth and total flavolignan (silymarin) upon copper sulphate (as abiotic elicitor) elicitation was targeted. Copper sulphate (CuSO4) was applied in concentrations of 0, 3, 5, 7 and 9 µM to elicit the silymarin production in cultures. The elicitation periods used in this study were 2, 4, 7, 14 and 28 days. Half-strength MS medium recorded better results relative to full-strength MS one and seed incubation in the darkness at room temperature resulted in rapid germination and reached to the gar lid after 10 days. Callus fresh and dry weights as well as growth index were gradually increased with increasing the copper sulphate concentration till 5 µM while decreased thereafter at any elicitation period. With the increase of the elicitation period, the increase of the previous parameters was observed. Flavonolignan (silymarin) was positively correlated with CuSO4 levels since all levels of copper sulphate significantly enhanced its content in relative to the control. Additionally, more silymarin was accumulated after 4 or 7 days and the accumulation significantly decreased when the elicitation period reached 14 days more. The highest silymarin (flavolignan) content (11.79 and 11.67 mg g–1 DW) was obtained when 5 or 7 µM copper sulphate levels were combined with 4 days elicitation period, being about five-fold of the control.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 105-114
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Embedded RFID and Wireless Mesh Sensor Network Materializing Automated Production Line Monitoring
    Autorzy:
    Zulkifli, C.
    Hassan, H.
    Ismail, W.
    Semunab, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402545.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    84.84.-x
    07.57.-c
    Opis:
    In industrial manufacturing, wireless network can be used in supply chain, retail stock management, electronic security keys, and theft prevention. A proactive and cost effective solution advancement is needed in the industrial manufacturing to monitor and control output performance at a manufacturing plant. It is with this reason that the manufacturers require an efficient communication and real time feedback to maximize uptime and improve productivity. Consistent with the future market of new technologies deployment this invention proposes a new complete solution method and architecture of embedded active radio frequency identification with counter system through wireless mesh sensor network platform and smart data processing adopted through web-based monitoring system for industrial automation. The ability of the developed system to function in machine-to-machine wireless communication and the adoption of web-based monitoring and data centralization contributes improvement in reducing errors with human intervention. In this paper we discuss the framework approach of a smart web-based monitoring and data acquisition system on wireless mesh sensor network platform. The evaluations and measurements have been conducted in real world environments which are conducted at selected industrial production factory.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-86-B-89
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodegradation properties of poly (lactic) acid reinforced by kenaf fibers
    Autorzy:
    Surip, S.
    Wan Jaafar, W.
    Azmi, N.
    Hassan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1155189.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.jf
    Opis:
    This study was conducted to study the degradation of poly (lactic acid) and its composites under natural landfill burial. Composites reinforced with natural fibres were expected to degrade faster than polymer itself. PLA was compounded with kenaf bast fibre (KBC) and kenaf core fibre (KCC) with twin screw extrusion at temperature range 150-160°C and being compression moulded at 170°C for 8 minutes. Samples were then cut prior to testing by burying under composting area in UiTM Shah Alam, Selangor, Malaysia for 6 month period. Samples were measured and observed monthly for the degradation of composites by weight loss and microscopic observation. As expected weight loss for kenaf bast composite (KBC) and kenaf core composite (KCC) was found to be higher, 15.9% and 17.1% respectively, than that of pure PLA of only 4.14%. Microscopic observation confirms degradation has occurred on surface of composites by making cracks, holes, and black spots on all samples, however degradation was more obvious on composites. FTIR analysis shows that spectra of exposed composites were reduced compared to those of unexposed composites.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 835-837
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perceived organizational politics and job satisfaction : the role of personality as moderator
    Postrzegana polityka organizacyjna oraz zadowolenie z pracy : rola osobowości jako moderatora
    Autorzy:
    Hassan, H.
    Vina, T. M. H.
    Ithnin, N. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/361952.pdf
    Data publikacji:
    2017
    Wydawca:
    Wyższa Szkoła Logistyki
    Tematy:
    organizational politics
    job satisfaction
    personality
    extraversion
    openness
    polityka organizacyjna
    zadowolenie z pracy
    osobowość
    ekstrawersja
    otwartość
    Opis:
    Background: This study aims to examine the predictive effect of perceived organizational politics on employees’ job satisfaction, and the role of personality (extraversion, openness, agreeableness and conscientiousness) in moderating the relationship. Methods: Data were collected using self-report questionnaires from 210 employees working in private organizations in Malaysia. The hypothesized relationships were tested using hierarchical regression analyses. Results: Consistent with the prediction, results of the study indicated that perceived organizational politics was negatively related to job satisfaction (R2 = 0.09). From the four personality traits, only extraversion and openness were found to moderate the relationship between perceived organizational politics and job satisfaction. Conclusion: The findings of this research extent the current knowledge on the importance of personality traits in relation to perceived organizational politics and job satisfaction among employees.
    Wstęp: Praca ma na celu przeanalizowanie przewidywanego wpływu postrzeganej polityki organizacyjnej na zadowolenie z pracy pracowników oraz rolę osobowości (ekstrawersja, otwartość, ugodowość oraz sumienność) w kształtowaniu powiązań i wzajemnych stosunków. Metody: Dane zostały zebrane poprzez przeprowadzenie wywiadu ankietowego wśród 210 pracowników prywatnych przedsiębiorstw w Malezji. Hipotezy zdefiniowane na tej podstawie zostały poddane ocenie przy użyciu analizy regresji hierarchicznej. Wyniki: Zgodnie z przewidywaniami, wyniki badania wskazują, że postrzegana polityka organizacji jest odwrotnie skorelowana z zadowoleniem z pracy (R2 = 0.09). Spośród czterech ocenianych cech osobowości, tylko ekstrawersja i otwartość, miały wpływ na zależności pomiędzy postrzeganą polityką organizacji a zadowoleniem z pracy. Wnioski: Otrzymane rezultaty badań poszerzają dostępną wiedzę dotyczącą istotności cech charakteru w relacji z postrzeganą polityką organizacji a zadowoleniem z pracy wśród pracowników.
    Źródło:
    LogForum; 2017, 13, 4; 479-493
    1734-459X
    Pojawia się w:
    LogForum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nuclear model calculation of excitation functions of neutron induced reactions on the structural materials of the miniature neutron source reactor (Nigeria Research Reactor 1)
    Autorzy:
    Dauda, A.
    Jonah, S. A.
    Hassan, M.
    Muhammad, B. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182744.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    EXFOR
    EXIFON
    MNSR
    NIRR-1
    Opis:
    Nuclear models calculation of excitation functions was performed using the nuclear theoretical model code EXIFON on the impurity nuclides of the Be-reflector of the MNSR (NIRR-1). Elements with concentration greater than 100 ppm were considered in the energy range of 0-20 MeV. Result of the calculated excitation functions obtained with the code EXIFON were compared with the experimental data retrieved from IAEA-Nuclear Data section EXFOR data library. Some of the results of the calculated excitation functions agree well with the experimental data, while some disagree. The good agreement was obtained for nuclides with magic number of neutrons and protons. Shell structure effects were not taken into consideration during calculation with theoretical model code. This might be the reason for disagreement. It is also noted that most of the data retrieved from EXFOR data library were incomplete, scanty, and are measured around 14 MeV. This exposed the short coming of using measured data for calculation of excitation functions. On the other hand the result of calculated excitation function with the Code EXIFON seems to give good result. Empirical research method was largely used in determining the success of this research.
    Źródło:
    World Scientific News; 2017, 66; 86-96
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concentration of Copper and Lead in Market Milk and Milk Products of Bangladesh
    Autorzy:
    Shahriar, S. M. S.
    Akther, S.
    Akter, F.
    Morshed, S.
    Alam, M. K.
    Saha, I.
    Halim, M. A.
    Hassan, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412537.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Heavy metal
    copper
    lead
    milk
    milk products
    Opis:
    The aim of this work is to detect and estimate the level of selected heavy metals (copper and lead) in milk and milk products in Chittagong City Corporation Areas of Bangladesh. The most important milk and milk products that are likely to be an important contributor to heavy metal exposure was selected. Total 30 samples of milk and milk products were analyzed among these 20 raw milk samples was collected from 20 dairy farms around industrial area in Chittagong City and 10 milk product samples were collected from market in Chittagong City. Detection and estimation of the level of copper and lead were carried out by using “Analytikjena Atomic Absorption Spectrophotometer, model: ZEEnit700P, Germany”. It was found that, most of all milk samples contain copper and lead copper and lead. The content of copper in most of all raw milk and milk products were in the range from 0.02 mg/kg to 0.25 mg/kg. The highest level of copper was found 0.244 mg/kg in milk products. The concentration of lead in milk and milk products were in the range from 0.007 mg/kg to 0.02 mg/kg. The highest concentration of lead was found 0.019 mg/kg in raw milk. These values were compared with standard allowable limit and also with the corresponding values of different countries available in literature.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 8; 56-63
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effectiveness of Sequencing Batch Biofilm Reactor Technology to Treat Domestic Wastewater in Basrah City
    Autorzy:
    Al-Rekabi, Wisam S.
    Al-Khafaji, Samar A.
    Hassan, Ayman H.
    Janna, Hussein
    Powiązania:
    https://bibliotekanauki.pl/articles/1955515.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    SBBR
    sequencing batch biofilm reactor
    domestic wastewater
    COD
    NH3-N
    ammoniacal nitrogen
    TN
    total nitrogen
    TP
    total phosphorous
    Opis:
    The efficiency of a Sequencing Batch Biofilm Reactor (SBBR) for domestic wastewater treatment in Basrah was assessed. The experiments were carried out via a laboratory-scale SBBR cylindrical vessel used for this study, with geometric volume of 26 L, having an internal diameter of 15 cm, a height of 40 cm, and a working volume of 13 L. After a one-month start-up cycle for biofilm growth on the fibrous filler, the SBBR research test period lasted two months. The SBBR was run for three weeks to ensure that the biological treatment systems were mature and those steady-state requirements were reached, throughout the starting-up phase of operation, the removal efficiency for COD, NH3-N, TN, and TP were 95%, 89%, 85%, and 93% respectively. The impact of aeration time on the SBBR efficiency was also tested by removal of COD, ammonia, total nitrogen TN, and total phosphorous TP under different levels of dissolved oxygen DO (2.0 – 6.8) mg\L. The SBBR method proved to be an effective method for treating domestic wastewater in Basrah city. The COD, NH3-N, TN, and TP concentrations in the effluent were 42, 6.7, 9.0, and 1.0 mg/L, respectively, with the removal efficiency rates of 90.32 %, 86.24 %, 84.75 %, and 84.38 %. When comparing the SBBR effluent value to the WHO, European, Iraqi, and Chinese discharge standards, it was observed that the COD concentration (42 mg/L) met these standards. while ammonia (6.7 mg/L), TN (9.0 mg/L), and TP (1.0 mg/L) met the WHO, European, and Chinese standard only.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 8; 234-242
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In situ methanolic solvent synthesis, spectroscopic and thermogravimetric characterizations of three new transition metal complexes of trimethoprim drug
    Autorzy:
    Refat, Moamen S.
    Al-Humaidi, Jehan Y.
    El-Sayed, Mohamed Y.
    Hassan, Reham F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849325.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    complexation
    trimethoprim
    transition metals
    TGA
    thermogravimetric analysis
    FTIR
    Fourier transform infrared spectroscopy
    ESR
    kinetic thermodynamic parameters
    Opis:
    Trimethoprim drug (TMP) complexes of copper (II), cobalt (II), and nickel (II) were prepared and discussed by using elemental analysis (C, H, N analysis), magnetic, molar conductance, FTIR, Raman spectroscopy, electron spin resonance (ESR) and UV-vis spectroscopy analyses. TMP drug coordinated as a tridentate ligand towards the respected three metal ions through two nitrogen atoms of amino groups and nitrogen atom of pyrimidine ring which flanked between –NH2 groups, these assignments confirmed by spectroscopic, magnetic, ESR and thermogravimetric analyses with formulas [Cu(TMP)(H2O)3]Cl2, [Co(TMP)(H2O)3]Cl2 and [Ni(TMP) (H2O)]Cl2. Copper (II) and cobalt (II) complexes have an octahedral geometrical structure included one TMP molecule, three coordinated water molecules and two uncoordinated chlorine atoms while, nickel(II)–TMP complex has a tetrahedral geometric configuration that involved one TMP molecule, one coordinated water molecule and two uncoordinated chlorine atoms. The activation energies and other kinetic thermodynamic parameters were estimated based on the employed of the Coats-Redfern and Horowitz-Metzger equations. The nano–structured form of the synthesized TMP complexes was confirmed dependent on the transmission electron microscopy (TEM).
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 1; 60-67
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extended finite element numerical analysis of scale effect in notched glass fiber reinforced epoxy composite
    Rozszerzona analiza numeryczna metodą elementów skończonych efektu skali w epoksydowym kompozycie z karbem wzmocnionym włóknem szklanym
    Autorzy:
    Abdellah, M. Y.
    Alsoufi, M. S.
    Hassan, M. K.
    Ghulman, H. A.
    Mohamed, A. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/139922.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    XFEM
    extended finite element method
    composite laminate
    fracture processing zone
    crack opening displacement
    rozszerzona metoda elementów skończonych
    laminat kompozytowy
    strefa procesu pęknięcia
    przemieszczenie otworu szczeliny
    Opis:
    Nominal strength reduction in cross ply laminates of [0/90]2s is observed in tensile tests of glass fiber composite laminates having central open hole of diameters varying from 2 to 10 mm. This is well known as the size effect. The extended finite element method (XFEM) is implemented to simulate the fracture process and size effect (scale effect) in the glass fiber reinforced polymer laminates weakened by holes or notches. The analysis shows that XFEM results are in good agreement with the experimental results specifying nominal strength and in good agreement with the analytical results based on the cohesive zone model specifying crack opening displacement and the fracture process zone length.
    Zmniejszenie nominalnej wytrzymałości laminatu warstwowego z poprzecznym ułożeniem włókien typu [0/90]2s jest obserwowane dla naprężeń rozciągających w laminatach kompozytowych z włóknem szklanym mających centralny otwór o średnicy od 2 do 10 mm. Jest to dobrze znany efekt rozmiaru (efekt skali). Rozszerzona analiza metodą elementów skończonych (XFEM) została zastosowana w celu symulacji procesu pękania i efektu skali w polimerowych laminatach z włóknem szklanym osłabionych obecnością karbu lub otworu. W pracy wykazano, że wyniki metody XFEM dotyczące wytrzymałości nominalnej są zgodne z danymi eksperymentalnymi, dobrze zgadzają sią z wynikami analitycznymi opartymi na modelu strefy spójnej i pozwalają określić przemieszczenie otworu szczeliny i długość strefy procesu pęknięcia.
    Źródło:
    Archive of Mechanical Engineering; 2015, LXII, 2; 217-236
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    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:
    Mechanical properties under quasi-static loading of the core made of flax/poly(lactic acid) composite
    Właściwości mechaniczne w warunkach quasi-statycznego obciążenia struktur zazębiających się z kompozytu len/poli(kwas mlekowy)
    Autorzy:
    Zuhri, M. Y. M.
    Nasrudin, M. A.
    Nasrodin, M. A. M.
    Sapuan, S. M.
    Hassan, M. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1789929.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    compression strength
    flax
    interlocking
    specific energy absorption
    wytrzymałość na ściskanie
    len
    zazębianie
    energia właściwa
    Opis:
    This paper investigates the mechanical behavior of an interlocking structure made of flax/poly(lactic acid) (PLA) composites manufactured using hot press compression molding. The flax/PLA composite manufactured at a temperature of 190°C and pressed for 10 minutes obtained the highest values of strength and modulus. A range of core cell sizes between 10 and 40 mm with a height from 20 to 40 mm was fabricated using a simple slotting technique. The larger core size offers a better relative density value when comparing to the smaller size (with a similar number of layers). The results also showed that the 10 mm core size exhibits better compression strength than the 20 and 40 mm core sizes. In contrast, the specific energy absorption (SEA) values of the structures increase as the core size decreases.
    Zbadano właściwości mechaniczne struktury zazębiającej się, wytworzonej z kompozytu len/poli(kwas mlekowy) (PLA) metodą prasowania na gorąco. Struktura z kompozytu prasowanego przez 10 minut w temperaturze 190°C wykazywała największe wartości wytrzymałości na ściskanie i modułu. Za pomocą prostej techniki szczelinowania wytworzono szereg komórek rdzeniowych o wymiarze podstawy od 10 do 40 mm i wysokości od 20 do 40 mm. Większy wymiar podstawy rdzenia zapewniał korzystniejszą wartość gęstości względnej. Stwierdzono, że struktury o wymiarze podstawy rdzenia 10 mm wykazują lepszą wytrzymałość na ściskanie niż struktury o wymiarach 20 i 40 mm, natomiast wartości absorpcji energii właściwej (SEA) struktur rosną wraz ze zmniejszaniem się wymiarów podstawy rdzenia.
    Źródło:
    Polimery; 2021, 66, 3; 193--197
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of High Entropy Alloy as Catalyst for Azo Dye Degradation in Fenton Process
    Autorzy:
    Hassan, Nur Hudawiyah Abu
    Nasir, Nisa Syukrina Mat
    Rahman, S. N. A.
    Irfan, Abd Rahim
    Nordin, Norhuda Hidayah
    Powiązania:
    https://bibliotekanauki.pl/articles/2203739.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    azo dye
    catalyst
    fenton process
    high entropy alloys
    HEAs
    Opis:
    Azo dye is widely used in the textile industry since it is cost effective and simple to use. However, it becomes a continuous source of environmental pollution due to its carcinogenicity and toxicity. Various methods had been used to remove the azo dye in solution. One of the famous and frequently used is the Fenton process. The Fenton process is one of the advanced oxidation processes where iron catalysed hydrogen peroxide to generate hydroxyl radical. Treating azo dyes in solution requires a catalyst to enhance the process of degradation. Herein, high entropy alloys (HEAs) have been proposed as a catalytic material to enhance the performance of Fenton process for azo dye degradation. HEAs have been reported as a promising catalyst due to its high surface area. The higher the number of active sites, the higher the rate of azo dye degradation as more active sites are available for adsorption of azo dyes. The results have shown that HEAs can be used as a catalyst to fasten the Fenton reaction since the degradation time is proven to be shorter in the presence of HEAs. The method derived from the result of this study will contribute in treating azo dyes for wastewater management in the Fenton process.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 209--213
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Does melatonin improve the yield attributes of field-droughted banana under Egyptian semi-arid conditions?
    Autorzy:
    Hassan, Islam F.
    Gaballah, Maybelle S.
    Ogbaga, Chukwuma C.
    Murad, Soha A.
    Brysiewicz, Adam
    Bakr, Basem M.M.
    Mira, Amany
    Alam-Eldein, Shamel M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073748.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    banana
    deficit irrigation
    evapotranspiration
    melatonin
    photosynthesis
    Opis:
    Drought is regarded as one of the environmental constraints threatening agriculture worldwide. Melatonin is a pleiotropic molecule prevalent in plants capable of promoting plant endogenous resilience to many environmental challenges including drought. Banana is an important staple food consumed in developing countries especially in Africa. In this research, we studied the role of melatonin in the growth of bananas subjected to drought under the Egyptian semi-arid conditions. To achieve this objective, a field experiment on banana (Musa spp., cv. Williams) mother plants and first ratoon was conducted on a private farm for two seasons - 2019 and 2020. Three irrigation treatments, 100, 90 and 80% irrigation water requirements (IWR) were used in conjunction with four concentrations of melatonin as a foliar spray (0 μmol, 40 μmol, 60 μmol, and 80 μmol) to determine the effect of both treatments on banana plant performance under drought. The results showed that there was a substantial difference between treatments, with the foliar application of melatonin at 80 μmol concentration improving most of the yield attributes, relative water content, total chlorophyll and proline with water deficit. However, the foliar application of the molecule lowered the biochemical characteristics mostly at 80% IWR under the Egyptian semi-arid conditions. Overall, there was a concentration-dependent response with regards to IWR for the two seasons 2019 and 2020.
    Źródło:
    Journal of Water and Land Development; 2022, 52; 221--231
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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