Journal of Engineering and Technological Sciences最新文献_第9页

Discretization Corrected Particle Strength Exchange for Steady State Linear Elasticity 稳态线性弹性的离散化修正粒子强度交换

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.3

C. Adnel, L. Zuhal

{"title":"Discretization Corrected Particle Strength Exchange for Steady State Linear Elasticity","authors":"C. Adnel, L. Zuhal","doi":"10.5614/j.eng.technol.sci.2022.54.4.3","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.3","url":null,"abstract":"Discretization corrected particle strength exchange (DC PSE) is a particle based spatial differential operator designed to solve meshless continuum mechanics problems. DC PSE is a spatial gradient operator that can discretize a computational domain with randomly distributed particles, provided that each particle has enough neighboring particles. In contrast, conventional methods such as the standard finite difference method require the computational domain to be discretized into a Cartesian grid. In linear elasticity simulations, especially steady state cases, this domain is mostly discretized using mesh-based methods such as finite element. However, while particle methods such as smoothed particle hydrodynamics (SPH) have been widely applied to solve dynamic elasticity problems, they have rarely been used in steady state simulations. In this study, a DC PSE operator was used to solve steady linear elasticity problems in a two-dimensional domain. The result of the DC PSE numerical simulation was compared to numerical results, empirical formula results, and results from conventional commercial finite element software, respectively.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42280496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Gold Nanoparticle (AuNP)-based Colorimetric Aptasensor for Penicillin G Detection 纳米金(AuNP)基青霉素G比色传感器的研制

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.13

Darmawati Darmawati, A. Z. Mustopa, B. Budiarto, S. Rahmawati, F. Izzati, R. Harmoko, E. Saepudin, A. Mahsunah

{"title":"Development of Gold Nanoparticle (AuNP)-based Colorimetric Aptasensor for Penicillin G Detection","authors":"Darmawati Darmawati, A. Z. Mustopa, B. Budiarto, S. Rahmawati, F. Izzati, R. Harmoko, E. Saepudin, A. Mahsunah","doi":"10.5614/j.eng.technol.sci.2022.54.4.13","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.13","url":null,"abstract":"Antibiotics are chemical or biological substances that have the ability to kill pathogens selectively. Currently, high-performance liquid chromatography (HPLC) is used routinely in the detection of antibiotics. However, the cost of analysis and running time are bottlenecks for HPLC to be used for routine tests to detect antibiotics. Alternative methods need to be developed to overcome this issue. In this study, the development of a penicillin G specific biosensor by using a DNA aptamer and gold nanoparticles (AuNPs) was done. Optimal aptasensor conditions were achieved with the concentrations of NaCl and aptamer at 0.25 M and 2 μM, respectively. An aptasensor of this type showed LOD for penicillin G at 3 mg/L and was able to detect penicillin G in the range of 3 to 27 mg/L. The established aptasensor showed specific sensitivity toward penicillin G after testing with several antibiotics, i.e., ampicillin, kanamycin, chloramphenicol, and erythromycin. The aptasensor could detect the presence of penicillin G from culture medium of wild-type, ultraviolet irradiation mutant, gamma irradiation mutant, and ultraviolet irradiation and gamma irradiation mutant strains of P. chrysogenum, at detection concentrations of 9.75 ± 0.004; 25.25 ± 0.005; 37.5 ± 0.005; and 45 ± 0.004 mg/L, respectively.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46716768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM) 小型手工金矿汞排放对水质变化影响的藻类群测定

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.14

H. D. Ariesyady, Indah Yusliga Sari Purba

{"title":"The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM)","authors":"H. D. Ariesyady, Indah Yusliga Sari Purba","doi":"10.5614/j.eng.technol.sci.2022.54.4.14","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.14","url":null,"abstract":"Artisanal small scale gold mining (ASGM) practices typically use mercury for amalgamation. Near water environments this can degrade water quality and aquatic biota, including algae. Changes in algal communities can reflect water environment disturbance. The aim of this study was to determine if algae can be used as bioindicator of river water quality impacted by ASGM activities. The research was conducted from July to October 2018 at thirty sampling sites along rivers near ASGM areas in several regencies of Indonesia. Composite samples of water and sediment were collected. A plankton net and brushing methods were used to collect planktonic and benthic algae, respectively. The physicochemical parameters of the water and the sediment as well as the dominant algae genera were analyzed statistically with principal component analysis. The results showed that the total mercury concentration in the water ranged from <0.04 to 20 µg.L-1, while in the sediment the maximum value was 13,500 µg.kg-1. The total mercury content in the sediment was negatively correlated with the dominant benthic Navicula at a significance level of p < 0.05. This means that a low density of benthic Navicula can be proposed as a bioindicator of water quality, indicating the increase of mercury pollution in sediment.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49036146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Al on ZnO Electron Transport Layer in Perovskite Solar Cells 铝对钙钛矿太阳能电池中ZnO电子传递层的影响

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.9

Nur Syafiqah Nadiah Mohd Alias, F. Arith, A. N. Mustafa, MohdMuzafar Ismail, Nur Fatihah Azmi, M. S. Saidon

{"title":"Impact of Al on ZnO Electron Transport Layer in Perovskite Solar Cells","authors":"Nur Syafiqah Nadiah Mohd Alias, F. Arith, A. N. Mustafa, MohdMuzafar Ismail, Nur Fatihah Azmi, M. S. Saidon","doi":"10.5614/j.eng.technol.sci.2022.54.4.9","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.9","url":null,"abstract":"Perovskite solar cells have shown remarkable performance and improvements in terms of solar cell efficiency. The ETL material is one of the important components in perovskite solar cells in conducting electrons to produce current. Here, ZnO was used as ETL material in a perovskite solar cell using the SCAPS 1D simulation software. The ZnO ETL showed poor cell efficiency due to its reaction with the perovskite material. A small amount of Al doped into ZnO was introduced to enhance the physiochemical properties of the ZnO against perovskite materials. Al concentrations were varied between 1 and 4 mol% to observe the effect on cell efficiency. Compared with a conventional ZnO ETL solar cell with 0 mol% Al perovskite, the Al-doped based solar cell showed better performance. Meanwhile, perovskite solar cells with 1 mol% Al-doping and appropriate layer thickness showed the best cell performance in improving the charge transport mechanism, resulting in increased cell efficiency. Thus, the parameters studied can be a guide in the fabrication process.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44765440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Strength Enhancement, Ductility, and Confinement Effectiveness Index of Fly Ash-based Geopolymer Concrete Square Columns 粉煤灰基地聚合物混凝土方柱的强度增强、延性及约束效能指标

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.11

Herwani Herwani, I. Imran, B. Budiono, Ediansjah Zulkifli

引用次数: 1

Comparative Analysis of Compression Molded Products of Recycled Waste Poly(Vinyl Chloride) and Virgin Poly(Vinyl Chloride) Fill Material 回收废旧聚氯乙烯与原聚氯乙烯填充材料压缩成型制品的对比分析

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.12

S. Sultana, Md. Khabir Uddin Sarker, Z. Islam, M. S. Islam

引用次数: 1

Microwave-assisted Synthesis of Functionalized Multiwalled Carbon Nanotube–Titanium Dioxide Hybrid Structure and Photodegradation 微波辅助合成功能化多壁碳纳米管-二氧化钛杂化结构及其光降解

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.7

Y. Irmawati, Shofia Manzalini, B. Sugeng, S. Sudirman, Harayasu Asahara, R. Yudianti

{"title":"Microwave-assisted Synthesis of Functionalized Multiwalled Carbon Nanotube–Titanium Dioxide Hybrid Structure and Photodegradation","authors":"Y. Irmawati, Shofia Manzalini, B. Sugeng, S. Sudirman, Harayasu Asahara, R. Yudianti","doi":"10.5614/j.eng.technol.sci.2022.54.4.7","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.7","url":null,"abstract":"Decoration of a functionalized multiwalled carbon nanotube (f-MWCNT) surface with titanium dioxide (TiO2) was designed to improve its photocatalytic degradation performance. Structural decoration was achieved by microwave heating at various mass ratios (1:2; 1:4; 1:8; 1:16 wt.%) of titanium (IV) isopropoxide as precursor. The hybrid structure of TiO2/f-MWCNT was characterized by scanning electron microscope and transmission electron microscope (TEM). The crystallite form of the TiO2 nanoparticles was further studied by X-ray diffraction (XRD) and HR–TEM. We report the conformation of high-density TiO2 coated on an f-MWCNT surface at a mass ratio of 1:16 wt.%. XRD analysis revealed a structural transformation from mixture phase (anatase–brookite) at mass ratios of 1:2 and 1:4 wt.% to fully anatase phase for mass ratios of 1:8 and 1:16 wt.%. The transformation was also confirmed by selected area electron diffraction (SAED) and HR–TEM analysis. Our results showed that anatase phase plays a significant role in photodegradation activity.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48394237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab 平板桁架冲剪加固有效性试验研究

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.2

S. Salehuddin, S. Zaini, M. A. Megat Johari, N. L. Rahim, M. A. Rahim

{"title":"Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab","authors":"S. Salehuddin, S. Zaini, M. A. Megat Johari, N. L. Rahim, M. A. Rahim","doi":"10.5614/j.eng.technol.sci.2022.54.4.2","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.2","url":null,"abstract":"The use of reinforced concrete flat slabs in building construction increases the floor-to-floor clearance, expedites site operations, and offers aesthetically rewarding features. However, punching shear failure in a flat slab is brittle in nature and can be potentially catastrophic. Many studies have been conducted to improve the punching shear capacity of flat slabs but some of the proposed punching shear reinforcements were complicated and costly. This research aimed to evaluate the effectiveness of a simple and cost-effective; truss-shaped punching shear reinforcement embedded in a 1200 mm × 1200 mm × 175 mm thick flat slab specimen. Three types of truss-shaped punching shear reinforcements were prepared. All specimens were supported at the edges and subjected to gravity load tests. The results showed that the introduction of truss-shaped punching shear reinforcement increased the punching shear capacity in the range of 7.71% to 21.47%. The maximum deflection of these specimens exhibited an insignificant increase compared to the control specimen, suggesting that punching failure governed the ultimate behavior. The additional strength offered by truss-shaped punching shear reinforcement makes flat slabs as a construction material more appealing because they allow them to withstand higher design loads.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42939510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Split-Hopkinson Pressure Bar Specimen Fixture to Accommodate Punch and Double-Notch Shear Testing 适应冲孔和双缺口剪切试验的分离式霍普金森压杆试样夹具的设计

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.8

Arya Dipajaya, Kemal I. Ahmad, M. A. Kariem

引用次数: 2

Modeling Salinity Propagation in Cikarang Bekasi Laut Channel, Bekasi Regency, West Java Province, Indonesia 印度尼西亚西爪哇省贝卡西县Cikarang Bekasi Laut海峡盐度传播模型

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.10

Harman Ajiwibowo, M. B. Pratama

引用次数: 0