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    Wyświetlanie 1-14 z 14
    Tytuł:
    Investigation of phytochemicals and in vivo antidiabetic evaluation of leaves and bark of Engelhardtia colebrookiana Lindl.
    Autorzy:
    Faisal, Muhammad
    Mushtaq, Waheeda
    Isthtiaq, Muhammad
    Qadeer, Mohammad
    Powiązania:
    https://bibliotekanauki.pl/articles/1178253.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Diabetes
    Engelhardtia colebrookiana
    Glucose
    Medicinal Plant
    Rabbits
    Opis:
    Diabetes mellitus is a complex metabolic disorder resulting from either insulin insufficiency or insulin dysfunction. Diabetes mellitus affects most of the people in both developed and developing countries. The treatment of diabetes with synthetic drugs is costly and chances of side effects are high. Phytomedicine has been used since ancient times in various parts of the world where access to modern medicine is limited. Present study was designed to check the anti-diabetic activity of methanolic extract of Engelhardtia colebrookiana L. locally known as samma or samna on Alloxan induced diabetic rabbits. Animals were divided into five groups. Group I: In this group rabbits were considered as normal control. Group II: In this group rabbits was considered as diabetic control. Group III: In this group rabbits were given by Glucophage. Group IV: In this group rabbits were given by oral dose of 1g of methanolic extract of Engelhardtia colebrookiana’s bark per day. Group V: In this group rabbits were given oral dose of 1g of methanolic extract of Engelhardtia colebrookiana’s leaves per day. The leaves extract significantly reduces the blood glucose level and body weight along with these it was found very effective in improving serum insulin level as compared to other groups and no side effect was observed in the rabbits during treatment.
    Źródło:
    World Scientific News; 2018, 91; 99-110
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Particle Size and Ramie Fiber Ratio on Hybrid Bio Panel Production from Oil Palm Trunk as Thermal Insulation Materials
    Autorzy:
    Mawardi, Indra
    Nurdin
    Fakhriza
    Rizal, Samsul
    Aprilia, Sri
    Faisal, Muhammad
    Jaya, Ramadhansyah Putra
    Powiązania:
    https://bibliotekanauki.pl/articles/2202371.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    oil palm trunk
    hybrid bio panel
    thermal insulation
    particle size
    ramie fibre ratio
    RSM
    response surface methodology
    Opis:
    The abundant availability of waste oil palm trunks is one of the potential fibers for new thermal insulation materials. While focusing on the manufacturing of thermal insulation materials, the main points to be considered are particle size, reinforcement fiber ratio, and press durations, besides binders type and temperature. This study aimed to optimize the manufacturing process of hybrid bio panels based on oil palm trunks as thermal insulation material. The response surface methodology (RSM), with a Box-Behnken Design (BBD), was used to model and optimize the manufacturing process variables. A total of 17 hybrid bio panels were in operation and the independent variables used were particle size, ramie ratio, and press duration. The dependent variables were water absorption, thickness swelling, MOR, and thermal conductivity. The hybrid bio panel obtained under the optimum conditions was characterized by thermogravimetric analysis to observe thermal stability. On the basis of analysis of variance and the contour plot, it was discovered that the interaction between particle size and ramie fiber ratio was a significant variable to optimize hybrid bio panel manufacture. The thermal resistance and modulus of rupture of hybrid bio panels also improved with higher particle size and ramie fiber ratio. The optimum manufacturing process was obtained at OPT particle size of 0.248 mm, ramie fiber ratio of 19.775, and press duration of 25 min. This condition produces a thermal conductivity of 0.079 W/mK, modulus of rupture of 17.702 MPa, water absorption of 54.428%, and thickness swelling of 21.974%. In addition, the hybrid bio panel resulted in thermal stability of 341 °C.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 2; 39--49
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical analysis of fixed screen in coal extraction activities (case study: PT. MAL)
    Autorzy:
    Seprizal, Muhammad Faisal
    Hasjim, Machmud
    Juniah, Restu
    Powiązania:
    https://bibliotekanauki.pl/articles/27324348.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Techniki Górniczej KOMAG
    Tematy:
    extraction of coal
    fixed screen
    modification
    sizing
    Opis:
    The extraction of coal is one of the activities involved in mining operations, where drilling, blasting, milling, crushing, sizing, and screening of minerals are performed. At PT. MAL, Indonesia, this extraction activity involves in-pit processing, such as the sizing of coal using a fixed screen. This study aims to analyze the technical sectors regarding the use of fixed screens in coal production activities. This is carried out to reduce the production time and costs, as productivity is expected to increase and completely meet market demands. The challenges involved in the use of fixed screens influenced the availability value of coal. In this case, the use of availability (UA) and effective utilization (EU) values of the utilized excavator were insufficient. These conditions were due to the observation of many challenges in the coal extraction activities. The challenges also affected the performance and production of the excavator, where the solution emphasized the redesign of the fixed screen through the modification of several parameters, such as the angle of repose and screen capacity.
    Źródło:
    Mining Machines; 2022, 40, 4; 191--205
    2719-3306
    Pojawia się w:
    Mining Machines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of air permeability and effective thermal conductivity of multifilament polyester yarn by finite element analysis
    Przewidywanie przepuszczalności powietrza i efektywnej przewodności cieplnej wielowłókienkowej przędzy poliestrowej za pomocą analizy elementów skończonych
    Autorzy:
    Siddiqui, Muhammad Owais Raza
    Farooq, Salma
    Husain, Muhammad Dawood
    Faisal, Saira
    Powiązania:
    https://bibliotekanauki.pl/articles/2202633.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    sportswear
    thermal conductivity
    air permeability
    finite element analysis
    odzież sportowa
    przewodzenie ciepła
    przepuszczalność powietrza
    analiza elementów skończonych
    Opis:
    The effective thermal conductivity and air permeability of a multifilament polyester yarn used in sports T-shirts was investigated by computer modeling using finite element analysis (COMSOL Multiphysics, ABAQUS/CAE). It has been shown that the number of fibers, the porosity of the yarn and the proportion of fibers in the volume fraction of the yarn have a direct effect on the effective thermal conductivity and air permeability of the multifilament yarn. It was found that with the increase in the number of fibers, the porosity of the yarn decreases linearly, while the volume fraction of the fibers increases, and thus the effective thermal conductivity increases. In addition, air permeability decreases exponentially.
    Zbadano efektywne przewodzenie ciepła i przepuszczalność powietrza wielowłókienkowej przędzy poliestrowej stosowanej w koszulce sportowej poprzez modelowanie obliczeniowe z użyciem analizy elementów skończonych (COMSOL Multiphysics, ABAQUS/CAE). Wykazano, że liczba włókien, porowatość przędzy oraz udział objętościowy włókien w przędzy mają bezpośredni wpływ na przewodzenie ciepła i przepuszczalność powietrza przędzy wielowłókienkowej. Wraz ze wzrostem liczby włókien porowatość przędzy maleje liniowo, natomiast zwiększa się udział objętościowy włókien, a tym samym efektywne przewodnictwo cieplne. Ponadto przepuszczalność powietrza maleje wykładniczo.
    Źródło:
    Polimery; 2023, 68, 1; 6--18
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of pedestrians’ sidewalk service
    Autorzy:
    Mutiawati, Cut
    Suryani, Fitrika
    Faisal, Ruhdi
    Ahlan, Muhammad
    Powiązania:
    https://bibliotekanauki.pl/articles/1841245.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    IPA analysis
    pedestrians’ sidewalk
    satisfaction
    analiza IPA
    chodniki dla pieszych
    zadowolenie
    Opis:
    The presence of sidewalks is very important to support the safety, comfortability, and activities of pedestrians in CBD (Central Business District). Therefore, this study was conducted to analyze the service quality of the pedestrian lanes in two CBDs of Banda Aceh City using the Importance-Performance Analysis (IPA) method. The results showed most of the service quality variables of the sidewalks are in quadrant A (concentrate here), followed by C (low priority), D (possible over-skill), and B (keep up the good work). This means the qualities of the sidewalk services need to be improved to ensure their performances are in line with pedestrians’ expectations. This is necessary because most of the width and height of these sidewalks were found through field investigation not to meet government standards, whereas several obstacles were also discovered such as the presence of traders, merchandises, and parked vehicles, as well as the lack of seating facilities and disability lanes. These violations are part of the problems in many cities of Indonesia and other developing countries and are due to the lack of public awareness and supervision by the authorities. Therefore, further improvement is recommended to realize the expected pedestrian path.
    Źródło:
    Transport Problems; 2020, 15, 4, cz. 1; 69-82
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solution of linear and non-linear boundary value problems using population-distributed parallel differential evolution
    Autorzy:
    Nasim, Amnah
    Burattini, Laura
    Fateh, Muhammad Faisal
    Zameer, Aneela
    Powiązania:
    https://bibliotekanauki.pl/articles/91569.pdf
    Data publikacji:
    2019
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    parallel evolutionary algorithms
    differential evolution
    boundary value problems
    optimization
    Opis:
    Cases where the derivative of a boundary value problem does not exist or is constantly changing, traditional derivative can easily get stuck in the local optima or does not factually represent a constantly changing solution. Hence the need for evolutionary algorithms becomes evident. However, evolutionary algorithms are compute-intensive since they scan the entire solution space for an optimal solution. Larger populations and smaller step sizes allow for improved quality solution but results in an increase in the complexity of the optimization process. In this research a population-distributed implementation for differential evolution algorithm is presented for solving systems of 2nd-order, 2-point boundary value problems (BVPs). In this technique, the system is formulated as an optimization problem by the direct minimization of the overall individual residual error subject to the given constraint boundary conditions and is then solved using differential evolution in the sense that each of the derivatives is replaced by an appropriate difference quotient approximation. Four benchmark BVPs are solved using the proposed parallel framework for differential evolution to observe the speedup in the execution time. Meanwhile, the statistical analysis is provided to discover the effect of parametric changes such as an increase in population individuals and nodes representing features on the quality and behavior of the solutions found by differential evolution. The numerical results demonstrate that the algorithm is quite accurate and efficient for solving 2nd-order, 2-point BVPs.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2019, 9, 3; 205-218
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Distilled Water and Kerosene as Dielectrics on Machining Rate and Surface Morphology of Al-6061 During Electricdischarge Machining
    Autorzy:
    Arshad, Rubab
    Mehmood, Shahid
    Shah, Masood
    Imran, Muhammad
    Qayyum, Faisal
    Powiązania:
    https://bibliotekanauki.pl/articles/102557.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    aluminium alloy 6061 T6
    dielectric
    electric discharge machining
    electrode
    surface morphology
    stop aluminium 6061 T6
    dielektryk
    obróbka elektroerozyjna
    elektroda
    morfologia powierzchni
    Opis:
    Electric Discharge Machining (EDM) is widely used for manufacturing complex metal parts. The machining parameters like dielectric fluid, electrode material, current, voltage and pulse rate during EDM are controlled to obtain desired Material Removal Rate (MRR) and it also affects the surface morphology of manufactured components. In this research, effect of changing machining parameters, dielectric fluid (distilled water and kerosene) and electrode materials (copper and graphite) on surface morphology of Al 6061 T6 alloy during EDM is investigated. It is observed that the distilled water reacts with the molten aluminum and produces deep pits / voids on the surface due to liberation of hydrogen gas. A micro crack network is seen radiating from the edge of these pits. It is believed that the very high thermal conductivity of distilled water is responsible for the micro crack network and reduced material removal rate when compared with non-reactive kerosene oil.
    Źródło:
    Advances in Science and Technology. Research Journal; 2019, 13, 3; 162-169
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Solublising Aids on The Entrapment of Loratidine in Pre-Fabricated PVA Filaments Used for FDM Based 3D-Printing
    Autorzy:
    Mahmood, Faisal
    Hussain, Amjad
    Arshad, Muhammad Sohail
    Abbas, Nasir
    Irfan, Muhammad
    Qamar, Nadia
    Hussain, Fahad
    Ghori, Muhammad Usman
    Powiązania:
    https://bibliotekanauki.pl/articles/895332.pdf
    Data publikacji:
    2020-02-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    3D printing
    Plasticizers
    Fused deposition modelling (FDM)
    PVA filaments
    Solubilizers
    Opis:
    Low drug loading efficiency is the limiting factor in the use of pre-fabricated filaments for 3D printing of pharmaceuticals. The aim of present study was to modify the material properties of pre-fabricated filament by incorporating the suitable solubilizing aids in order to enhance the drug loading efficiency. Loratadine was loaded into PVA filaments by using solubilizers (Soluplus®, Sodium lauryl sulphate) and plasticizers (glycerin and Polyethylene glycol-400) and the printability of filaments was investigated. The treated filaments were characterized for morphology and diameter changes, drug content, FTIR and thermal properties and printed into tablets of suitable dimensions. The printed tablets were also characterized for drug assay and drug release. The results have shown that the surface of different drug loaded filaments become rough with almost no change in diameter hence, these filaments remained printable. However, there was 7 to 24 times enhancement in drug content of filaments treated with particularly those pretreated with glycerin and soaked in drug solution containing Soluplus. The printed tablets have also shown almost similar drug content as their precursor filaments and the release followed diffusion mechanism in most of the formulations. The study concludes that the treatment of PVA filament with solubilizer aids has significantly improved the drug loading entrapment without compromising the printability.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 175-182
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy Efficiency in 5G Communications – Conventional to Machine Learning Approaches
    Autorzy:
    Shahid, Muhammad Khalil
    Debretsion, Filmon
    Eyob, Aman
    Ahmed, Irfan
    Faisal, Tarig
    Powiązania:
    https://bibliotekanauki.pl/articles/1839308.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    5G
    energy efficiency
    wireless networks
    Opis:
    Demand for wireless and mobile data is increasing along with development of virtual reality (VR), augmented reality (AR), mixed reality (MR), and extended reality (ER) applications. In order to handle ultra-high data exchange rates while offering low latency levels, fifth generation (5G) networks have been proposed. Energy efficiency is one of the key objectives of 5G networks. The notion is defined as the ratio of throughput and total power consumption, and is measured using the number of transmission bits per Joule. In this paper, we review state-of-the-art techniques ensuring good energy efficiency in 5G wireless networks. We cover the base-station on/off technique, simultaneous wireless information and power transfer, small cells, coexistence of long term evolution (LTE) and 5G, signal processing algorithms, and the latest machine learning techniques. Finally, a comparison of a few recent research papers focusing on energy-efficient hybrid beamforming designs in massive multiple-input multiple-output (MIMO) systems is presented. Results show that machine learningbased designs may replace best performing conventional techniques thanks to a reduced complexity machine learning encoder.
    Źródło:
    Journal of Telecommunications and Information Technology; 2020, 4; 1-9
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study for optimal design of geosynthetic reinforced soil (GRS) walls
    Autorzy:
    Dastgerd, Rashid Hajivand
    Bahrami, Nima
    Kazemi, Kamran
    Waqar, Muhammad Faisal
    Malinowska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/38890060.pdf
    Data publikacji:
    2024
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    geogrid
    geosynthetic reinforced soil
    GRS
    finite element analysis
    parametric study
    Opis:
    The geosynthetic reinforced soil (GRS) system finds applications in numerous geotechnical projects, including retaining walls, road and railway embankments, slope stability structures, landfill structures, etc. This is attributed to its ability to enhance soil bearing capacity while minimizing deformations. Over the recent decades, extensive research has been conducted to comprehensively understand the behavior of GRS systems. In our research, we initially validate two laboratory tests using finite element (FE) modeling and conduct a parametric study. Our findings demonstrate that increasing the stiffness of layers from the bottom to the top of the wall significantly reduces wall displacements, approaching a state where all layers have uniform stiffness. Additionally, we investigate the plastic zone and the length of geogrids in each layer. Our results indicate that reducing the length of layers from top to bottom, similar to the plastic zone shape, does not impact displacements and forces within the layers. Simultaneously increasing stiffness with height and decreasing geogrid layer lengths within the plastic zone reduces the cost of GRS wall construction.
    Źródło:
    Engineering Transactions; 2024, 72, 1; 3-14
    0867-888X
    Pojawia się w:
    Engineering Transactions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of forming tools and process parameters on surface roughness in incremental sheet forming
    Autorzy:
    Khalil, Umair
    Aziz, Muhammad Haris
    Jahanzaib, Mirza
    Ahmad, Wasim
    Hussain, Salman
    Hafeez, Faisal
    Powiązania:
    https://bibliotekanauki.pl/articles/103319.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ISF
    quantitative survey
    forming tool
    forming parameters
    surface roughness
    badanie ilościowe
    narzędzia do formowania
    chropowatość powierzchni
    Opis:
    Literature has vastly advocated for incremental sheet forming as a significant process for formation of sheet metal components, because of its higher formability in comparison with the rest of metal forming processes such as deep drawing and stamping. Due to high formability of incremental sheet forming it becomes important to investigate the main factors, influencing the quality of forming products. However, less attention has been given to investigate the inconsistencies reflected often in determining the effect of multiple forming parameters and parametric interactions comprising of spindle rotational speed and feed rate, tool size and sheet thickness, sheet thickness and step depth. This study investigates the effect of various principal factors including tool type, tool size, sheet thickness, spindle speed, feed rate, step increment including and their respective interaction on surface roughness. Research data was collected by undertaking extensive literature review of previous studies on incremental sheet forming regarding surface quality. A quantitative one way analysis of variance (ANOVA) was employed to analyze the significance and contribution of factors influencing surface quality of sheet forming. The findings highlight the contribution of forming parameters and their combined interactions on surface roughness. Based on the empirical findings, this study derives implications for the optimization of tool type, parametric interactions among principal factors and their respective optimized operational range for incremental sheet forming.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 3; 75-95
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Fibre Orientation and Void Content in Bagasse Fibre Composites Using an Image Analysis Technique
    Zastosowanie techniki analizy obrazu do badania orientacji włókien i zawartości pustych przestrzeni w kompozytach wzmocnionych włóknami bagasse
    Autorzy:
    Siddique, Sheraz Hussain
    Faisal, Saira
    Mohtashim, Qurat-ul-Ain
    Ali, Muhammad
    Gong, R. Hugh
    Powiązania:
    https://bibliotekanauki.pl/articles/1419413.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    composites
    bagasse fibre
    fibre orientation
    void content
    weight percentage
    alkali treatment
    kompozyty
    włókno bagasse
    orientacja włókien
    zawartość wolnej przestrzeni
    procent wagowy
    obróbka alkaliczna
    Opis:
    In this research work, a nondestructive technique of image analysis was explored to determine the fibre orientation and void content in Bagasse fibre reinforced composites. Fibre length, alkali treatment and fibre loading were studied as variables. The fibre orientation was irrespective of the fibre length, fibre loading and alkali treatment variables. The void content and size decreased with increases in fibre length and alkali treatment. The alkali treatment resulted in the removal of lignin, making the surface of the fibres rough. It also led to making the fibre count fine i.e. reducing the diameter of the fibres and thus presenting more fibres for interaction with resin. Both these phenomena resulted in a slower flow of resin. The void content of bagasse fibre composites decreased with higher fibre loading because a higher number of fibres slows the resin flow. However, the size i.e. area of the voids increased with the fibre loading from 20 to 30%, probably due to increased wetting difficulty.
    W pracy badawczej zbadano nieniszczącą technikę analizy obrazu w celu określenia orientacji włókien i zawartości pustych przestrzeni w kompozytach wzmocnionych włóknem bagasse. Jako zmienne zbadano długość włókien, obróbkę alkaliami i obciążenie włókien. Orientacja włókien była niezależna od długości włókna, obciążenia włókna i parametrów obróbki alkalicznej. Ilość i rozmiar pustych przestrzeni zmniejszały się wraz ze wzrostem długości włókna i obróbką alkaliczną. Obróbka alkaliczna spowodowała usunięcie ligniny, powodując szorstkość powierzchni włókien. Doprowadziło to również do dokładnego zliczenia włókien, tj. zmniejszenia średnicy włókien, a co za tym idzie większej liczby włókien w interakcji z żywicą. Oba te zjawiska spowodowały wolniejszy przepływ żywicy. Ilość pustych przestrzeni w kompozytach włókien bagasse zmniejszyła się wraz ze wzrostem obciążenia włókien, ponieważ większa liczba włókien spowalnia przepływ żywicy. Jednak rozmiar, tj. obszar pustych przestrzeni, wzrastał wraz z obciążeniem włókien od 20% do 30%, prawdopodobnie z powodu zwiększonej trudności zwilżania.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2021, 3 (147); 26-32
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Review on Adsorption of Heavy Metals from Wood-Industrial Wastewater by Oil Palm Waste
    Autorzy:
    Ayob, Syafiqa
    Othman, Norzila
    Altowayti, Wahid Ali Hamood
    Khalid, Faisal Sheikh
    Bakar, Norshila Abu
    Tahir, Muhammad
    Soedjono, Eddy Setiadi
    Powiązania:
    https://bibliotekanauki.pl/articles/1839174.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    industrial wastewater
    heavy metal
    adsorption
    activated carbon
    oil palm waste
    Opis:
    The use of heavy metals in the manufacturing industry over the past few decades has eventually contributed to a rise in the flow of metallic compounds into wastewater and has raised significant ecological and health threats to living things. Adsorption is an excellent way to treat solid waste effluent, offering significant benefits such as affordability, profitability, ease of operation and efficiency. However, the price of commercial adsorbent namely activated carbon has soared due to its high demand. There is also a green improvement in this method by turning the commercial adsorbent into agricultural waste. In Malaysia, the oil palm waste is such suitable material that can be utilized for making activated carbon, since they are ample and easy to find. Additionally, part of them is agricultural waste that cannot be consumed (i.e. leaves and fronds). Hence, this study aimed to analyse the potential of activated carbon from agricultural waste, namely oil palm waste, in reducing the levels of heavy metals in industrial wastewater.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 3; 249-265
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the importance of synchrophasor technology, smart grid, and applications
    Autorzy:
    Baba, Maveeya
    Nor, Nursyarizal B.M.
    Sheikh, Aman
    Nowakowski, Grzegorz
    Masood, Faisal
    Rehman, Masood
    Irfan, Muhammad
    Arefin, Ahmed Amirul
    Kumar, Rahul
    Baba, A. Momin
    Powiązania:
    https://bibliotekanauki.pl/articles/2173713.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phasor measurement unit
    PMU
    micro-PMU
    Global Positioning System
    GPS
    optimal PMU placement
    smart grid
    SG
    jednostka pomiaru fazorów
    mikro-PMU
    globalny system pozycjonowania
    optymalne rozmieszczenie PMU
    sieć inteligentna
    Opis:
    The electrical network is a man-made complex network that makes it difficult to monitor and control the power system with traditional monitoring devices. Traditional devices have some limitations in real-time synchronization monitoring which leads to unwanted behavior and causes new challenges in the operation and control of the power systems. A Phasor measurement unit (PMU) is an advanced metering device that provides an accurate real-time and synchronized measurement of the voltage and current waveforms of the buses in which the PMU devices are directly connected in the grid station. The device is connected to the busbars of the power grid in the electrical distribution and transmission systems and provides time-synchronized measurement with the help of the Global Positioning System (GPS). However, the implementation and maintenance cost of the device is not bearable for the electrical utilities. Therefore, in recent work, many optimization approaches have been developed to overcome optimal placement of PMU problems to reduce the overall cost by providing complete electrical network observability with a minimal number of PMUs. This research paper reviews the importance of PMU for the modern electrical power system, the architecture of PMU, the differences between PMU, micro-PMU, SCADA, and smart grid (SG) relation with PMU, the sinusoidal waveform, and its phasor representation, and finally a list of PMU applications. The applications of PMU are widely involved in the operation of power systems ranging from power system control and monitor, distribution grid control, load shedding control and analyses, and state estimation which shows the importance of PMU for the modern world.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 6; art. no. e143826
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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