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    Wyświetlanie 1-23 z 23
    Tytuł:
    Resource Management Techniques in Cloud-Fog for IoT and Mobile Crowdsensing Environments
    Autorzy:
    Ali Al-muqarm, Abbas M.
    Ali Hussien, Naseer
    Powiązania:
    https://bibliotekanauki.pl/articles/27311923.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    IoT
    Fog
    Cloud
    resource allocation
    Task Scheduling
    Opis:
    The unpredictable and huge data generation nowadays by smart devices from IoT and mobile Crowd Sensing applications like (Sensors, smartphones, Wi-Fi routers) need processing power and storage. Cloud provides these capabilities to serve organizations and customers, but when using cloud appear some limitations, the most important of these limitations are Resource Allocation and Task Scheduling. The resource allocation process is a mechanism that ensures allocation virtual machine when there are multiple applications that require various resources such as CPU and I/O memory. Whereas scheduling is the process of determining the sequence in which these tasks come and depart the resources in order to maximize efficiency. In this paper we tried to highlight the most relevant difficulties that cloud computing is now facing. We presented a comprehensive review of resource allocation and scheduling techniques to overcome these limitations. Finally, the previous techniques and strategies for allocation and scheduling have been compared in a table with their drawbacks.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 2; 341--352
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topological properties of four-layered neural networks
    Autorzy:
    Javaid, M.
    Abbas, M.
    Liu, Jia-Bao
    Teh, W. C.
    Cao, Jinde
    Powiązania:
    https://bibliotekanauki.pl/articles/91541.pdf
    Data publikacji:
    2019
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    degree of node
    topological properties
    neural network
    probabilistic neural
    network
    Opis:
    A topological property or index of a network is a numeric number which characterises the whole structure of the underlying network. It is used to predict the certain changes in the bio, chemical and physical activities of the networks. The 4-layered probabilistic neural networks are more general than the 3-layered probabilistic neural networks. Javaid and Cao [Neural Comput. and Applic., DOI 10.1007/s00521-017-2972-1] and Liu et al. [Journal of Artificial Intelligence and Soft Computing Research, 8(2018), 225-266] studied the certain degree and distance based topological indices (TI’s) of the 3-layered probabilistic neural networks. In this paper, we extend this study to the 4-layered probabilistic neural networks and compute the certain degree-based TI’s. In the end, a comparison between all the computed indices is included and it is also proved that the TI’s of the 4-layered probabilistic neural networks are better being strictly greater than the 3-layered probabilistic neural networks.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2019, 9, 2; 111-122
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and assessment of a single pile subjected to lateral load
    Autorzy:
    Abbas, J. M.
    Chik, Z.
    Taha, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/178422.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    piles
    lateral response
    slenderness ratio
    flexural rigidity
    3D FE analysis
    Opis:
    A three-dimensional finite element technique was used to analyse single pile lateral response subjected to pure lateral load. The main objective of this study is to assess the influence of the pile slenderness ratio on the lateral behaviour of single pile. The lateral single pile response in this assessment considered both lateral pile displacement and lateral soil resistance. As a result, modified p-y curves for lateral single pile response were improved when taking into account the influence lateral load magnitudes, pile cross sectional shape and flexural rigidity of the pile. The finite element method includes linear elastic, Mohr-Coulomb and 16-nodes interface models to represent the pile behaviour, soil performance and interface element, respectively. It can be concluded that the lateral pile deformation and lateral soil resistance because of the lateral load are always influenced by lateral load intensity and soil type as well as a pile slenderness ratio (L/D). The pile under an intermediate and large amount of loading (in case of cohesionless soil) has more resistance (low lateral displacement) than the pile embedded on the cohesion soil. In addition, it can be observed that the square-shaped pile is able to resist the load by about 30% more than the circular pile. On the other hand, pile in cohesionless soil was less affected by the change in EI compared with that in cohesive soil.
    Źródło:
    Studia Geotechnica et Mechanica; 2018, 40, 1; 65-78
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CYTOTOXIC ACTIVITY OF VARTHEMIA IPHIONOIDES ESSENTIAL OIL AGAINST VARIOUS HUMAN CANCER CELL LINES
    Autorzy:
    Abbas, Manal M.
    Abbas, Manal A.
    Kandil, Yasser I.
    Powiązania:
    https://bibliotekanauki.pl/articles/895451.pdf
    Data publikacji:
    2019-08-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    apoptosis
    cytotoxicity
    anticancer
    varthemia iphionoides
    Opis:
    Varthemia iphionoides is a perennial plant that belongs to Asteraceae family. This study investigates the cytotoxic effect of V. iphionoides essential oil on breast (MCF7), prostate (PC3), and chronic myelogenous leukemia (K562) and normal human fibroblast cell lines using MTT assay and flow cytometric analysis. In addition, GC-MS of the oil was carried out. The IC50 values for PC3, MCF7, K562 and fibroblast were 145.3, 188.8, 87.88 and 173.3 µg/ml, respectively. V. iphionoides essential oil was most effective against K562. Flow cytometric results for IC50 dose of V. iphionoides oil on K562 cells showed 32.2 % apoptosis in 24 h. GC-MS analysis resulted in the identification of 25 compounds. 1,8-Cineole, borneol, and α-cadinol were the major constituents of V. iphionoides volatile oil. In conclusion, this study reveals for the first time the cytotoxic activity of V. iphionoides essential oil on K562 cell line which may occur through apoptosis induction.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 4; 701-706
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of multi extrusion die process on mechanical and chemical behavior of 2024-T3 alloy
    Autorzy:
    Razooqi, Ahmed Ibrahim
    Abbas, Naseer M.
    Ghazi, Sara Saad
    Powiązania:
    https://bibliotekanauki.pl/articles/2174206.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wyciskanie
    odkształcenie plastyczne
    korozja elektrochemiczna
    Al 2024-T3
    extrusion
    plastic deformation
    electrochemical corrosion
    Opis:
    In this paper, a cold multi-pass extrusion process for a 15mm in diameter solid 2024-T3 aluminum alloy rod was carried out using three dies to obtain three different diameters of 14mm, 13mm, and 12mm. The microstructure, hardness, and corrosion behavior were investigated before and after the extrusion process. Load-Displacement data were recorded during each extrusion process. The electrochemical corrosion test was made in a 3.5 wt.% NaCl solution using potentiostat instrument under static potentials test. Corrosion current was recorded to determine the corrosion rate for specimens. The results showed that the extrusion load increased with the number of extrusion passes, which is also seen in hardness test results. In addition, the corrosion rate decreased with the increase in the number of extrusion passes. This is due to severe plastic deformation, which generates a fine grain structure of (AlCu) and (AlCuMg) components.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 3; 163--170
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modulation of Doxorubicin Cytotoxicity by Isoliquiritin and Cynarin Combination on Different Cancer Cell Lines
    Autorzy:
    Al-AdamI, Salat G.
    Al-Khateeb, EKBAL H.
    NUMAN, NAWFAL A.
    ABBAS, Mannal M.
    Tawfiq, FATIMA A.
    Shakya, Ashok K.
    Powiązania:
    https://bibliotekanauki.pl/articles/895633.pdf
    Data publikacji:
    2020-06-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    cytotoxicity
    doxorubicin
    cancer cells
    Modulation
    Cynarin
    Isoliquiritin
    Opis:
    Natural polyphenolic compounds produced by plant exhibit many pharmacological effects including antioxidant, chemopreventive as well as anticancer properties. This study was conducted to investigate the effect of cynarin ( from Artichoke, Cynara scolymus) and isoliquiritin (from Licorice, Glycyrrhiza uralensis) on doxorubicin (positive control) cytotoxicity in different cell lines including normal (Fibroblasts MCR-5 and Myoblasts H9c2) and cancer (colorectal HCT-116 and hepatocellular HEP-G2) cell lines. The cytotoxic effect of doxorubicin, isoliquiritin and cynarin alone or in different combination was studied on cancer cell lines as well as normal cell lines. The results obtained indicated that both cynarin and isoliquiritin enhance the cytotoxicity of doxorubicin. Both cynarin and isoliquiritin also reduce the cardiotoxicity of doxorubicin on normal cardiac cell lines. The combination of the three compounds (cynarin, isoliquiritin and doxorubicin) result in decrease the cytotoxicity of doxorubicin, which may indicate the presence of interaction and/or antagonism effect between cynarin and isoliquiritin. Cynarin was found to enhance the growth of (HCT-116 and HEP-G2) this might suggest avoiding use of Artichoke in subjects’ susceptibility for these cancers. All results were evaluated using statistical path and showed significant findings. The mechanism of enhanced doxorubicin’s cytotoxicity by cynarin or isoliquiritin also require further investigation to explain the increasing and/or the decreasing effect of these polyphenolic compounds on cytotoxicity of doxorubicin. The current finding can help to start with safe minimum dose of two or three combination of compounds in the context of clinical trials and practice.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 3; 475-484
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ANTINOCICEPTIVE ACTION OF ONONIS SPINOSA LEAF EXTRACT IN MOUSE PAIN MODELS
    Autorzy:
    Abbas, Manal
    Jaffal, Sahar M.
    Powiązania:
    https://bibliotekanauki.pl/articles/895326.pdf
    Data publikacji:
    2019-04-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    analgesic activity
    Ononis spinosa
    opioid receptor
    Opis:
    Ononis spinosa (spiny restharrow) is a perennial herb that belongs to the Fabaceae family. Among several uses, the aerial parts of O. spinosa are used in traditional medicine for toothache. In this study, analgesic activity of the methanolic extract of leaves was studied. In writhing test, the 300 mg/kg and 600 mg/kg doses of O. spinosa extract produced 90.1% and 94.5% inhibition of abdominal cramps, respectively compared to 23.6% inhibition produced by 30 mg/kg diclofenac sodium. O. spinosa methanolic extract reduced the time of licking in early and late phases of formalin test. The inhibitory effect of O. spinosa extract was more pronounced in late phase. The lowest dose tested (300 mg/kg) of O. spinosa extract produced 81.0% inhibition compared to 50.5% inhibition in 30 mg/kg diclofenac sodium in the late phase of formalin test. This effect was not abrogated by glibenclamide, naloxone or atropine indicating that the action of O. spinosa in formalin test is not mediated by ATP-sensitive K+ channel, opioid or muscarinic receptors. In tail-flick and hot-plate tests, O. spinosa increased the latency time at 30 min and 150 min. Naloxone antagonized the action of O. spinosa in both tests suggesting an interaction with opioid receptor as a possible mechanism of O. spinosa in thermal pain models at the spinal and supraspinal levels. Phytochemical screening indicated the presence of phenolics, saponins, flavonoids, and terpenoids. Alkaloids, sterols, and anthraquinone glycosides were absent. HPLC analysis confirmed the presence kaempferol, apigenin and myricetin in the extract.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 2; 299-304
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agro-morphological characterization of Brassica rapa L. germplasm from Azad Jammu and Kashmir
    Autorzy:
    Ashraf, M.
    Abbas, S.R.
    Begum, S.
    Gardezi, S.D.A.
    Khan, R.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/12700475.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Brassica rapa is an important crop of Azad Jammu and Kashmir which is a major source of vegetable and oil. The study was carried out to evaluate the genetic diversity among Brassica rapa germplasm grown in Azad Jammu and Kashmir based on their morphological characters and yield. The present study was carried out in the field of National Institute of Genomics and Advanced Biotechnology (NIGAB), NARC Islamabad from October 2017 to March 2018. The study showed great diversity among the germplasm for days to germination, primary branches, secondary branches, maturity, plant height, number of silique, seeds per silique, yield per plant and 1000 seed weight. The genotypes 026509, 026514 and 026548 showed maximum yield and other better morphological responses, so these genotypes should be used in future to enhance the production of this crop.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 4; 31-39
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dichroism of Poly(Methyl Methacrylate) Thin Films Doped with Disperse Orange 11 Molecules
    Autorzy:
    Abbas, B.
    Alshikh Khalil, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808005.pdf
    Data publikacji:
    2009-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.55.+b
    78.20.-e
    78.66.Qn
    Opis:
    We investigate the absorption spectra of poly (methyl methacrylate) (PMMA) thin films doped with Disperse Orange 11 (DO11) dye molecules which change under illumination with visible light. Dichroism measurements of the kinetics of the transmission changes at 472 nm at room and low temperatures (-60° C ± 2 °C) have been investigated. Our data show that the photoisomerisation reaction and the light-induced polar orientation depend on the molecular structure of the polymer. Simultaneous UV-visible spectroscopy at low temperature confirms the existence of two forms of DO11 molecules (keto and enol forms), which are responsible for the interaction with irradiating laser light and forming an anisotropic structure inside the PMMA/DO11 thin film.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 5; 857-863
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Experimental Method for Determination of the Refractive Index of Liquid Samples Using Michelson Interferometer
    Autorzy:
    Abbas, B.
    Alshikh Khalil, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191212.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.Ci
    78.40.-q
    07.60.Ly
    Opis:
    A new experimental and theoretical method has been presented for measuring the refractive index of liquids and transparent solids. The experimental setup is based on a modified version of the Michelson interferometer employing a rotation stage. This technique allows us the determination of the refractive index of a given liquid (or a transparent sample) accurately to high precision, with an accuracy limited only by the precision in the determination of the rotation angle.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1; 59-63
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional order Riemann-Liouville integral inclusions with two independent variables and multiple delay
    Autorzy:
    Abbas, S.
    Benchohra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/255816.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    integral inclusion
    left-sided mixed Riemann-Liouville integral
    time delay
    solution
    fixed point
    Opis:
    In the present paper we investigate the existence of solutions for a system of integral inclusions of fractional order with multiple delay. Our results are obtained upon suitable fixed point theorems, namely the Bohnenblust-Karlin fixed point theorem for the convex case and the Covitz-Nadler for the nonconvex case.
    Źródło:
    Opuscula Mathematica; 2013, 33, 2; 209-222
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Study of Diode Pumped Intracavity Doubled Passively Q-Switched Solid-State Lasers
    Autorzy:
    Alshikh Khalil, M.
    Abbas, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812353.pdf
    Data publikacji:
    2008-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.65.Ky
    42.55.Rz
    42.60.Gd
    02.60.Cb
    Opis:
    In this paper, some designed curves such as peak power, energy, pulse width, and a factor describing the pulse symmetry are generated. With these curves and expressions, one can design a passively Q-switched intracavity frequency-doubled laser and predict the pulse characteristics.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 6; 1639-1646
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fretting wear analysis of different tube materials used in heat exchanger tube bundle
    Autorzy:
    Abbas, T.
    Khushnood, S.
    Nizam, L. A.
    Usman, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/957958.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    fretting wear
    flow-induced vibration
    flexible tube
    cross flow velocity
    Opis:
    Research on heat exchange has been carried out for more than five decades because of its importance in process industries and power generation plants. Heat exchanger experiencing cross flow are vulnerable to flow-induced vibration. This vibration causes the interaction of tubes with the baffle resulting in a fretting wear of the tubes. The present study focuses on fretting wear analysis of different tube materials. Fretting wear tests were performed on aluminum, copper and stainless steel instrumented central tubes against mild steel baffle. For each tube material the tests were performed for three different test durations i.e. 60 minutes, 120 minutes and 180 minutes at a cross flow velocity of 0.55 m/s. It was observed that vibrational amplitude of the flexible test tube is affected by its weight. A scanning electron microscope was used to analyze and measure the sizes of wear scar. The results indicated that wear loss in case of aluminum tube is the highest while that in case of stainless steel tube is the lowest.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 123-133
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orange Peels as a Sustainable Material for Treating Water Polluted with Antimony
    Autorzy:
    Hasan, Manar B.
    Al-Tameemi, Israa M.
    Abbas, Mohammed N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839075.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    antimony treatment
    antimony adsorption
    polluted water
    orange peel
    low-cost material
    Opis:
    Water pollution has increased due to human activities; consequently, it is essential to treat both surface water and ground water so they are suitable to meet the needs of the population. This study will discuss water treatment intended to remove antimony. Antimony (Sb) is classed as a high-priority toxic pollutant because of its adverse effects on ecosystems and human health. There are several methods for removing antimony from water, including adsorption, coagulation, ion exchange, and electrochemical treatment. This study focuses on the adsorption method as researchers have, in recent times, been seeking adsorbents that are environmentally friendly and cost-effective and that do not leave a residue. The study investigates the use of orange peels treated with acetic acid as an adsorbent to remove antimony ions from a simulated aqueous solution. The results revealed that 5 g of treated orange peels is 98.5% effective at treating water at a pH of 6, for a contact time of 150 minutes, at a mixing speed of 450 rpm.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 2; 25-35
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Dynamic Dichroism Properties of Disperse Orange 11 Molecules and Azo-Molecules Doped in Poly(Methyl Methacrylate) Thin Films: A Comparison
    Autorzy:
    Abbas, B.
    Alshikh Khalil, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537688.pdf
    Data publikacji:
    2010-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.55.+b
    78.20.e
    78.66.Qn
    Opis:
    We investigate the dichroism characteristics of poly (methyl methacrylate) PMMA thin films doped with DO11, DO3, DSR13 and DSR1 dye molecules, which change under illumination with visible light. Our data show that photoisomerisation, phototautomerization reactions and light-induced polar orientation are dependent on the molecular structure of the polymer. Polar structure and molecular size, as well as the chemical structure of PMMA host, are the dominant parameters that determine both the extent and speed of dichroism buildup and relaxation processes. Two forms of DO11 molecules (keto and enol forms), and two other forms of azo-based dyes ( trans and cis forms) are responsible for the interaction with irradiating laser light and forming an anisotropic structure inside the PMMA/dye thin films.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 6; 904-910
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some new existence results and stability concepts for fractional partial random differential equations
    Autorzy:
    Abbas, S.
    Benchohra, M.
    Darwish, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/357770.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    random differential equations
    left-sided mixed Riemann-Liouville integral
    Caputo fractional-order derivative
    Banach space
    Darboux problem
    Ulam stability
    równanie różniczkowe
    pochodna Caputo
    przestrzeń Banacha
    problem Darbouxa
    Opis:
    In the present paper we provide some existence results and Ulam’s type stability concepts for the Darboux problem of partial fractional random differential equations in Banach spaces, by applying the measure of noncompactness and a random fixed point theorem with stochastic domain.
    Źródło:
    Journal of Mathematics and Applications; 2016, 39; 5-22
    1733-6775
    2300-9926
    Pojawia się w:
    Journal of Mathematics and Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy Content Estimation of Municipal Solid Waste by Physical Composition in Al-Diwaniyah City, Iraq
    Autorzy:
    Janna, Hussein
    Abbas, Mukhtar D.
    Al-Khuzaie, Marwah M.
    Al-Ansari, Nadhir
    Powiązania:
    https://bibliotekanauki.pl/articles/1955420.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    municipal solid waste
    energy content
    high heating value model
    waste characterization
    landfilling
    Opis:
    This study was undertaken to estimate the energy potential of municipal solid waste via creating a relationship between the high heating value (HHV) and the fractions of physical composition of municipal solid waste MSW (% food, % plastic, % paper, % wood, % textile) into the two scenarios, namely wet MSW (as discarded) and dry (free moisture). The created models were determined based on the results of obtained from the analysis of the components of the Al-Diwaniyah MSW and then from previous studies which involved experimental ultimate analysis (% C, % O, % H, % N, %S) of MSW, supported by the equations and models of previous studies which were used for HHV calculation. SPSS Statistical software was used to prepare the models. For each scenario, the input datasets were 60 cases, taking into account the minimization of the data and the average of HHV that result from equations. Four models were created, two models for each status where R2 was 1.00 and 0.999 for dry and wet situation, respectively. However, the equations of verification process showed that the models which depended on the dry fractions are more accurate. The produced HHV from the dry and wet MSW components in the Al-Diwaniyah City is 8655 KJ/Kg and 6440 KJ/Kg, respectively (as discarded).
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 7; 11-19
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of solidification behaviour and mechanical properties of arc stud welded AISI 316L stainless steel
    Autorzy:
    Abass, M. H.
    Alali, M. S.
    Abbas, W. S.
    Shehab, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/367964.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    arc stud welding
    AISI 316L stainless steel
    solidification mode
    solidification cracking
    second phase
    spawanie łukowe
    stal nierdzewna AISI 316L
    model krzepnięcia
    druga faza
    Opis:
    Purpose: This paper aims to investigate the impact of arc stud welding (ASW) process parameters on the microstructure and mechanical properties of AISI 316L stainless steel stud/plate joint. Design/methodology/approach: The weld performed using ASW machine. The influence of welding current and time on solidification mode and microstructure of the fusion zone (FZ) was investigated using optical microscope and scanning electron microscope (SEM). Microhardness and torque strength tests were utilised to evaluate the mechanical properties of the welding joint. Findings: The results showed that different solidification modes and microstructure were developed in the FZ. At 400 and 600 A welding currents with 0.2 s welding time, FZ microstructure characterised with single phase austenite or austenite as a primary phase. While with 800 A and 0.2 s, the microstructure consisted of ferrite as a primary phase. Highest hardness and maximum torque strength were recorded with 800 A. Solidification cracking was detected in the FZ at fully austenitic microstructure region. Research limitations/implications: The main challenge in this work was how to avoid the arc blow phenomenon, which is necessary to generate above 300 A. The formation of arc blow can affect negatively on mechanical and metallurgical properties of the weld. Practical implications: ASW of austenitic stainless steel are used in multiple industrial sectors such as heat exchangers, boilers, furnace, exhaust of nuclear power plant. Thus, controlling of solidification modes plays an important role in enhancing weld properties. Originality/value: Study the influence of welding current and time of ASW process on solidification modes, microstructure and mechanical properties of AISI 316 austenitic stainless steel stud/plate joint.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 1; 5-14
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the pre-injection system of a marine diesel engine through multiple-criteria decision-making and artificial neural networks
    Autorzy:
    Rodriguez, C. G.
    Lamas, M. I.
    Rodriguez, J. D.
    Abbas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2033205.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine engine
    emissions
    consumption
    artificial neural networks
    multi-criteria decision making
    computational fluid dynamics
    Opis:
    The present work proposes several pre-injection patterns to reduce nitrogen oxides in the Wartsila 6L 46 marine engine. A numerical model was carried out to characterise the emissions and consumption of the engine. Several pre-injection quantities, durations, and starting instants were analysed. It was found that oxides of nitrogen can be noticeably reduced but at the expense of increasing consumption as well as other emissions such as carbon monoxide and hydrocarbons. According to this, a multiple-criteria decision-making (MCDM) model was established to select the most appropriate parameters. Besides, an artificial neural network (ANN) was developed to complement the results and analyse a huge quantity of alternatives. This hybrid MCDM-ANN methodology proposed in the present work constitutes a useful tool to design new marine engines.
    Źródło:
    Polish Maritime Research; 2021, 4; 88-96
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure Development of Spark Plasma Sintered Ti-Nb Alloy by Heat Treatment
    Autorzy:
    Haq, M. A.
    Abbas, S. F.
    Eom, N. S. A.
    Kim, T. S.
    Lee, B.
    Park, K.-T.
    Kim, B. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/355593.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    TiNb alloy
    Spark plasma sintering
    Heat treatment
    Microstructure
    β-phase titanium
    Opis:
    The β-phase Titanium (β-Ti) alloys have been under the spotlight in the recent past for their use as biomedical prosthetic materials owing to their excellent properties such as low elastic modulus, high corrosion resistance and tensile strength. Recently, Niobium (Nb) has gained a lot of attention as a β-phase stabilizing element in Ti alloys to replace Vanadium (V) due to its excellent solubility in Ti, low elastic modulus and biocompatibility. In this work, low cost Ti-20Nb binary alloy has been fabricated via powder metallurgy procedures. The blended powder mixtures of Ti and Nb were sintered at 900°C for 20 mins by the Spark Plasma Sintering (SPS) with an applied uniaxial pressure of 40 MPa. The heating rate was fixed at 50°C/min. The sintered alloy was subject to heat treatments at 1200°C in vacuum condition for various time durations. The characterizations of microstructure obtained during this process were done using FE-SEM, EDS and XRD. By increasing heat treatment time, as understood, the volume of residual Nb particles was decreased resulting in accelerated diffusion of Nb into Ti. Micro hardness of the alloy increased from 340 to 355 HV with the increase in β phase content from 30 to 45%. The resultant alloys had relatively high densities and homogenized microstructures of dispersed lamellar β grains in α matrix.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1429-1432
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    BOX BEHNKEN DESIGN: A STATISTICAL APPROACH TO EVALUATE THE EFFECT OF CROSSLINKED CARBOXYMETHYL CELLULOSE AND SODIUM STARCH GLYCOLATE ON RELEASE KINETICS OF DRUG
    Autorzy:
    Hanif, Muhammad
    Abbas, Ghulam
    Rasul, Akhtar
    Khan, Sajid M.
    Amir, Muhammad N.
    Powiązania:
    https://bibliotekanauki.pl/articles/895395.pdf
    Data publikacji:
    2018-08-31
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    FTIR
    XRD
    DSC
    quality by design
    domperidone maleate
    drug release kinetics
    Opis:
    The aim of study was to evaluate the release kinetics of domperidone maleate (DM) from immediate release (IR) tablets prepared by wet granulation method. Box behnken design (BBD) was used to optimize and evaluate the main, interaction and quadratic effects of independent variables i.e. crosslinked carboxymethyl cellulose (CMC) (X1), sodium starch glycolate (SSG) (X2) and starch (X3) on responses R2 of first order (YI) and β value of weibull model (Y2). Prepared tablets were characterized by various physical tests, in-vitro drug release, fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). Accelerated stabilities studies were performed on optimized formulation D9. Y1 and Y2 were ranged from 0.9959 to 0.9994 and 0.041 to 0.912 respectively. β value of weibull model indicated the parabolic shape of dissolution curve. The quadratic model fit the data well and the resulting equations were used to predict the responses in the box behnken design. FTIR spectra showed the compatibility of DM with CMC and SSG. XRD presented diffraction lines indicates crystalline nature of drug. DSC thermograms indicated endothermic peak at 220 0C for DM. Stabilities studies revealed that no significant change in hardness, friability, disintegration time and dissolution release profile of DM. It is concluded that a combination of CMC and SSG can be used to enhance the dissolution and release kinetics of IR tablets of DM.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 4; 965-975
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of the effect of zinc oxide nanoparticles and extract of Acorus calamus applied topically on surgical wounds inflicted on the skin of rabbits
    Autorzy:
    Abbas, A.
    Muhammad, S.A.
    Ashar, A.
    Mehfooz, S.A.
    Rauf, A.
    Bakhsh, M.
    Nadeem, T.
    Fu, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/16648000.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    antibiotic resistance
    nanoparticle
    plant extract
    wound
    Opis:
    Antibiotics are used for postsurgical wound healing purposes but unfortunately, resistance against them demands some alternatives for quick recovery. Sepsis of wounds is a challenge for medical as well as veterinary professionals. Nanoparticles have significant advantages in wound treatment and drug resistance reversal. This study was conducted to appreciate emerging alternates of antibiotics like zinc oxide nanoparticles and plant extracts in topical application. Zinc oxide is considered a good wound healer and its nanoparticles are easy to access. So, the efficacies of zinc oxide nanoparticles and sweet flag plant extract ointments were tested to compare modern and traditional therapeutics as sweet flag is considered a pure medicinal plant. Rabbits were selected for this study due to the healing properties of their skin. Wounds were inflicted on the thoracolumbar region and treated for 29 days post-surgically daily with normal saline and the ointment of zinc oxide nanoparticles and sweet flag extract ointment, prepared in a hydrophilic solvent. Wound shrinkage was observed daily and histopathological analysis was made and results were compared. Zinc oxide nanoparticles ointment showed the most satisfactory results for every parameter included in the study. No side effects of its topical application were observed. Healing was normal without any complications. The preparations of zinc oxide nanoparticles may help in the era of antibiotic resistance as topical drugs in the future.
    Źródło:
    Polish Journal of Veterinary Sciences; 2023, 26, 2; 285-293
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact solution for heat conduction inside a sphere with heat absorption using the regularized Hilfer-Prabhakar derivative
    Autorzy:
    Elhadedy, Hager
    Latif, Mohamed S. Abdel
    Nour, Hamed M.
    Kader, Abbas H. Abdel
    Powiązania:
    https://bibliotekanauki.pl/articles/2175524.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    fractional derivatives
    Laplace transform
    finite sine-Fourier transform
    heat transfer
    pochodne ułamkowe
    transformata Laplace'a
    skończona transformata sinusoidalna-Fouriera
    wymiana ciepła
    Opis:
    In this article, we utilize the finite Sine-Fourier transform and the Laplace transform for solving fractional partial differential equations with regularized Hilfer-Prabhakar derivative. These transforms are used to get analytical solutions for the time fractional heat conduction equation (TFHCE) with the regularized Hilfer-Prabhakar derivative associated with heat absorption in spherical coordinates. Two cases of Dirichlet boundary conditions are considered by obtaining an analytical solution in each case. The effect of the parameters of the regularized Hilfer-Prabhakar derivative on the heat transfer inside the sphere is discussed using some figures.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 2; 27--37
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-23 z 23

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