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Wyświetlanie 1-10 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:
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:
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:
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:
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:
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:
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:
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
Wyświetlanie 1-10 z 14

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