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4th International Conference on Experimental and Computational Mechanics in engineering, ICECME 2022

作者： Supardi, Joli Rizal, Samsul Ali, Nurdin Fonna, Syarizal Ikramullah, Ikramullah Arifin, A.K. Doctoral Program School of Engineering Post Graduate Program Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical Engineering Teuku Umar University Meulaboh23615 Indonesia Department of Mechanical and Industrial Engineering Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical and Materials Engineering Universiti Kebangsaan Malaysia Selangor DE Bangi43600 Malaysia

ISBN: (纸本)9789819974948

Temiki (Melastoma Candidum) is one of the unutilized wild plants observed to be turning pests on plantations. It has only been used for medicine and not for engineering purposes. Therefore, this study aims to identify and analyze Temiki’s chemical compounds, which are useful as corrosion inhibitors. The plant was washed, dried, then blended until it became a fine powder, and was further extracted by employing the maceration method with ethanol as solvent. The extracted compounds were also analyzed using Gas Chromatography-Mass Spectrophotometry (GC–MS) and the results obtained include, 2-Furancarboxaldehyde (CAS) Furfural, 1,2,3-Propanetriol (CAS) Glycerol, Acetic acid,1-(2-methyltetrazole-5-yl) etheny, 4H-Pyran-4one,2,3-dihydro-3,5-dihydroxy, 5-Hydroxymethylfurfural, cis-dimethylmorpholine, 3-penten-1-ol,2,2,4-trimethyl-(CAS)2,2,4, 2-AMINO-9-(3,4-DIHYDROXY-5-HYDORO, D-Allose, beta-D-Glucopyranoside, methyl, Hexadecanoic acid, methyl ester, 9,12,15-Octadecatrienoic acid, methyl ester. In conclusion, these chemical compounds were useful as corrosion inhibitors. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Corrosion

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Synthesis of amorphous silica from rice husk ash using the sol–gel method: Effect of alkaline and alkaline concentration

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Materials Today: Proceedings 2023年 87卷 225-229页

作者： Aprilia S. Rosnelly C.M. Zuhra Fitriani F. Haffiz Akbar E. Raqib M. Rahmah K. Amin A. Baity R.A. Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

In this study, silica extraction from RHA (rice husk ash) has been successfully performed by alkaline using KOH and NaOH with sol–gel precipitation. The silica gel was characterized for the functional group by FTIR, crystallinity with XRD, structure silica with SEM and particle size with PSA. The results show the higher concentration of solvent led to higher silica. The FTIR analysis revealed vibrations of Si[sbnd]O and Si[sbnd]O[sbnd]Si on the product. Additionally, observed to be amorphous and aggregated, the silica extracted from RHA also exhibited a decrease in all samples. © 2023

关键词： Alkaline extraction Concentration of solvent Potassium hydroxide Rice husk ash Silica Sodium hydroxide

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Investigation of thermal conductivity and physical properties of oil palm trunks/ramie fiber reinforced biopolymer hybrid composites as building bio-insulation

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Materials Today: Proceedings 2022年 60卷 373-377页

作者： Mawardi, Indra Aprilia, Sri Faisal, Muhammad Rizal, Samsul Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Mechanical Engineering Politeknik Negeri Lhokseumawe Lhokseumawe24301 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia

The current buildings insulating materials in the construction market, which mainly consist of synthetic materials, have a high performance in thermal resistivity. However, they negatively impact the human health and the environment, thereby finding bio-insulating materials is necessary. This research investigates the thermal conductivity and physical performance of oil palm trunks/ramie fibers reinforced biopolymer hybrid composites for thermal insulation of buildings. The hybrid composites were further prepared using oil palm trunk particles, ramie fiber as the reinforcement, and tapioca starch as a biopolymer binder. All the manufactured hybrid composites exhibited thermal conductivity in a range of 0.0723 W/mK to 0.1344 W/mK and density of 732 kg/m3 to 801 kg/m3, respectively. Sample C1, with a density of 732 kg/m3 had the lowest thermal conductivity of (0.0723 W/mK). Moreover, the minimum absorbed water (53.66%) and thickness swelling (21.36%) were found in the C1 sample hybrid composites after 24-hours immersion in water. Thermal conductivity performance was influenced positively by physical properties. Therefore, the results of this research show that waste oil palm trunks and ramie fiber could be used as a thermal insulating material for buildings. © 2022

关键词： Thermal conductivity

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Synthesis of amorphous silica from rice husk ash using the sol-gel method: Effect of alkaline and alkaline concentration

Synthesis of amorphous silica from rice husk ash using the s...

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3rd International Conference on Chemical engineering and Applied Sciences, ICChEAS 2022

作者： Aprilia, Sri Rosnelly, Cut Meurah Zuhra Fitriani, Fitriani Haffiz Akbar, Emir Raqib, Muhammad Rahmah, Khairul Amin, Amri Baity, Rima Aidi Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh23111 Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

In this study, silica extraction from RHA (rice husk ash) has been successfully performed by alkaline using KOH and NaOH with sol-gel precipitation. The silica gel was characterized for the functional group by FTIR, crystallinity with XRD, structure silica with SEM and particle size with PSA. The results show the higher concentration of solvent led to higher silica. The FTIR analysis revealed vibrations of Si-O and Si-O-Si on the product. Additionally, observed to be amorphous and aggregated, the silica extracted from RHA also exhibited a decrease in all samples. © 2023 Elsevier Ltd. All rights reserved.

关键词： Sodium hydroxide

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Comparison between different internal cross-sections for pulmonary secretion suction catheters

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Research on Biomedical engineering 2022年第3期38卷 965-975页

作者： dos Santos Lima, Bruna Luiza Tadeu Las Casas, Marina Spyer de Oliveira, Patrícia Muniz Huebner, Rudolf Rodrigues-Machado, Maria da Glória de Las Casas, Estevam Barbosa Department of Structural Engineering Federal University of Minas Gerais Belo Horizonte Brazil Department of Mechanical Engineering Federal University of Minas Gerais Belo Horizonte Brazil Faculty of Medical Sciences of Minas Gerais Post-graduate Program in Health Sciences Belo Horizonte Brazil

Introduction: Endotracheal suctioning is a procedure to remove pulmonary secretions, which can lead to complications such as hypoxemia. To minimize this risk, a double-lumen pulmonary secretion suction device was developed at the Biomechanics Laboratory of the University of Minas Gerais. The aim of the study is to evaluate the flow of the removal of pulmonary secretions by reducing the cross-section for the passage of mucus, considering catheters with three new, distinct internal cross-sections (circular, semicircular, and curved). Methods: The study was divided into two stages: computer simulations in the software Ansys Fluent using three new internal cross-sections in order to assess the flow rate, secretion removal, and the preparation of solutions of mucus simulators (polyethylene glycol) in three concentrations (semi-liquid, intermediate, and semi-solid) to be aspirated by 12 Fr catheters and by a printed circular catheter in the bench test. Results: It was verified in a bench test that the relationship between shear stress and deformation rate of mucus simulator solutions is not linear and that a suction pressure of less than 300 mmHg, performed by a standard catheter, generates moderate rates of removal of thicker solutions. It is possible to verify, by computer simulations, higher flow rate levels when reducing the length of the circular catheter from 0.5 to 0.4 m. Semicircular catheter produces high flow rates when compared to other proposed catheters. Conclusion: Based on the results obtained, a dual-lumen semicircular catheter can be designed and validated by computer simulation. © 2022, Sociedade Brasileira de Engenharia Biomedica.

关键词： Catheters

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Studies of exposure UV light, soil Burial, and storage ability effect on characteristics of biocomposite films

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Materials Today: Proceedings 2023年 87卷 218-224页

作者： Fitriani F. Aprilia S. Arahman N. Bilad M.R. Djuned F. Fathanah U. Meilina H. Amin A. Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Faculty of Intergrated Technologies Universiti Brunei Darussalam Bandar Seri Begawan BE1410 Brunei Darussalam Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

UV exposure, soil burial, and storage ability tests were carried out on biocomposite films with different concentrations of nanocrystal cellulose to study their biodegradability and morphological properties compared to neat whey protein films. The addition of nanocrystal cellulose as a natural filler to the whey protein based film can change a variety of properties such as strength, shelf life, biodegradability, and resistance to environmental conditions that are required in food packaging. The degradation films were assessed by UV exposure and soil burial tests. On the other hand, packaging ability is analyzed through storage tests under controlled conditions. After the analysis, changes in physical, chemical, and morphological properties were observed in the biocomposite film. From these results, we can conclude that the whey protein film with the addition of 3% nanocrystal cellulose would be a more favorable choice because of its better properties and suitability for the proposed biodegradable food packaging application. © 2023

关键词： Biocomposite films Biodegradability Nanocrystal cellulose Storage ability Whey protein isolate

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Injectable Platelet-Rich Fibrin in Contact with Bone Substitutes, Porous Zirconia, or Laser-Textured Implant Surfaces: A Detailed Morphological Analysis

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Biomedical Materials and Devices 2024年第1期2卷 415-426页

作者： Oliveira, Miguel Noronha Varela, Hugo Almeida Nascimento, Rubens M. Sahoo, Narayan Carvalho, Oscar Henriques, Bruno Souza, Júlio C. M. Ceramic and Composite Materials Research Group (CERMAT) Department of Mechanical Engineering (EMC) Federal University of Santa Catarina (UFSC) Post-graduate Program in Materials Science and Engineering Federal University of Rio Grande Norte (UFRN) Center for MicroElectroMechanical Systems (CMEMS-UMINHO) Universidade do Minho LABBELS - Associate Laboratory University of Minho University Institute of Health Sciences (IUCS) CESPU

The aim of the present study was to perform a detailed morphological analysis of an injectable platelet rich fibrin after combination with two different particulate hydroxyapatite-based granules, a porous zirconia block, and laser-textured zirconia or titanium surfaces. Blood samples were harvested from three participants to prepare the flowable injectable PRF in contact or not with particulate hydroxyapatite (Hap), bone mineral granules (DBBM), porous zirconia blocks, laser-textured titanium or zirconia surfaces. Optical and scanning electron microscopy (SEM) were used to evaluate the fibrin network density, fibrin fibers’ diameter, blood cells, and the interaction of PRF with the biomaterials. Histomorphometry of the flowable PRF was also performed using the hematoxylin–eosin staining protocol. Specimens were independently evaluated by two blinded and well-trained researchers in histomorphometry and microscopy. Particulate Hap and DBBM shown different morphological aspects by SEM analyses since DBBM revealed macro- and micro-scale pores while Hap revealed a dense structure. Hydroxyapatite and DBBM granules were entirely embedded by the fibrin-network in the presence of leukocytes and blood platelets. The zirconia porous structured was filled with PRF and its components. Also, the laser-structured zirconia or implant surfaces were entirely coated with the PRF fibrin network embedding leukocytes and blood platelets. Laser-textured titanium surfaces revealed macro- and micro-scale irregularities that increase the surface area and retention of the injectable PRF. Histomorphometric analyses revealed complementary details on the distribution of lymphocytes, red blood cells, and fibrin associated with platelet aggregation. The flowing and viscosity of an injectable platelet rich fibrin provided an agglomeration of synthetic or xenogeneic particulate bone substitutes and the coating of porous zirconia and textured implant surfaces as inspected by scanning electron microsc

关键词： Bone healing Bone substitutes Histology Morphology Platelet-rich fibrin

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Identification of benefits, challenges, and pathways in E-commerce industries: An integrated two-phase decision-making model

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Sustainable Operations and Computers 2023年第1期4卷 200-218页

作者： Gupta, Srikant Kushwaha, Pooja.S. Badhera, Usha Chatterjee, Prasenjit Gonzalez, Ernesto D.R. Santibanez Department of Operations and Decision Sciences Jaipuria Institute of Management Jaipur India Department of Business Analytics Jaipuria Institute of Management Indore India Department of Business Analytics Jaipuria Institute of Management Jaipur India Department of Mechanical Engineering MCKV Institute of Engineering West Bengal 711204 India Post-Doctoral Fellow Management Graduate Program Universidade Paulista Indianópolis Campus Brazil Department of Industrial Engineering and CES 4.0 Faculty of Engineering University of Talca Curico Chile

The e-commerce industry has seen significant growth over the past decade as it focuses on convenience and accessibility, leading to a surge in online shopping with more and more consumers opting for it. At the same time, the e-commerce industry faces various challenges. In order to fully harness the potential of this industry, it is important to identify its benefits and challenges and focus on pathways to mitigate the challenges and harness its growth. This study utilizes the Delphi approach and involves experts from the e-commerce domain to get their opinions to identify the top ten benefits, challenges, and pathways for the e-commerce industry. Analytic Hierarchy Process (AHP) and Criteria Importance Through Intercriteria Correlation (CRITIC) methods are subsequently, employed to prioritize the identified factors. Results of the study revealed that factors such as affordable advertising & marketing;availability and product variety;and Global reachability are the most important benefits, while technological upgradation;returns or refunds;and counterfeit products posed the greatest challenges for the industry. Government compliance check;better relationship with delivery partners;and strong data privacy and online security policies emerged as the best pathways. This study also provides valuable insights to businesses, policymakers, and researchers in the e-commerce industry on how to navigate the benefits, challenges, and pathways of this rapidly growing sector. © 2023

关键词： Electronic commerce

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Maximum Application of Power Point Tracker on Microcontroller Based Dual Energy Solar Powered Dryer 3rd

Maximum Application of Power Point Tracker on Microcontrolle...

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3rd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2021

作者： Jalil, Saifuddin Muhammad Husaini Munadi, Rizal Sara, Ira Devi Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Electrical and Computer Engineering Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Department of Electrical Universitas Malikussaleh Lhokseumawe24351 Indonesia

ISBN: (纸本)9789811936289

Solar-powered dryers are still expensive and difficult to obtain for farmers with medium to low production capacity. For this reason, it is necessary to develop technology on a solar-powered dryer with a solar panel capacity of 200WP is equipped with a maximum power point tracker as an integrated solar collector with a photovoltaic system. The system in this solar-powered dryer consists of a solar panel tracker, a rotating aluminum cylinder net, a photovoltaic tracker, a battery bank, a microcontroller, and a DC/AC inverter. This system improves the performance of solar panels in the drying process of Moringa leaves. This design is expect to be the right system to ensure maximum results by providing solar radiation energy in the drying process of agricultural products. The aims goal to minimize problems in the drying of agricultural products experienced by farmers using an automatic dual-energy solar-powered dryer as a development innovation for the drying process. This study uses an experimental methodology and field data collection using a solar-powered dryer that has been analyzed and measured to obtain data comparisons. shows the maximum data of voltage and power response in positioning photovoltaic to produce the increased output power of photovoltaic array. Maximum application of powerpoint tracker on microcontroller based dual energy solar powered dryer on solar panels for drying moringa leaves produces the advantage of maximum energy absorption in solar panels and shortens the time in the drying process of moringa leaves. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Microcontrollers

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Studies of exposure UV light, soil Burial, and storage ability effect on characteristics of biocomposite films

Studies of exposure UV light, soil Burial, and storage abili...

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3rd International Conference on Chemical engineering and Applied Sciences, ICChEAS 2022

作者： Fitriani, Fitriani Aprilia, Sri Arahman, Nasrul Bilad, Muhammad Roil Djuned, Fauzi Fathanah, Umi Meilina, Hesti Amin, Amri Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh23111 Indonesia Faculty of Integrated Technologies Universiti Brunei Darussalam Bandar Seri BegawanBE1410 Brunei Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

关键词： Cellulose

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