Journal of Engineering and Technological Sciences最新文献

Lessons Learned in Interfacial Tension Prediction Using a Mixture of Sulfonate- and Ethoxylate-based Surfactants in a Waxy Oil-brine System 使用磺酸盐和乙氧基表面活性剂混合物预测蜡油-盐水体系中的界面张力的经验教训

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-31 DOI: 10.5614/j.eng.technol.sci.2023.55.6.1

Rani Kurnia, Dian Asfriany Nurfalah, Deana Wahyuningrum, T. Marhaendrajana, Utjok W.R Siagian

{"title":"Lessons Learned in Interfacial Tension Prediction Using a Mixture of Sulfonate- and Ethoxylate-based Surfactants in a Waxy Oil-brine System","authors":"Rani Kurnia, Dian Asfriany Nurfalah, Deana Wahyuningrum, T. Marhaendrajana, Utjok W.R Siagian","doi":"10.5614/j.eng.technol.sci.2023.55.6.1","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.6.1","url":null,"abstract":"The chemical-enhanced oil recovery (CEOR) method is applied to change reservoir rock or fluid characteristics by injecting alkaline, surfactant, and polymer or a combination of two or three of the compounds. Surfactant flooding improves oil recovery by reducing the interfacial tension between oil and water. Selecting reservoir surfactants, especially microemulsions, requires careful screening. This study predicted waxy oil system interfacial tension using surfactant mixtures at below- and above-optimum salinity. To predict the interfacial tension, microemulsion types, HLB, ideal salinity, and HLD were used. The study predicted oil-surfactant-water interfacial tension using SAE, FEO, and their mixtures. We improved the Huh equation by adding a fitting parameter, β, to accommodate the transition from type III to type II microemulsions as salinity increases. With increasing salinity, anionic surfactant’s hydrophilic-hydrophobic interactions change, affecting the values and surfactant layer thickness. This study improved hydrophilic-lipophilic deviation (HLDN) by establishing a fixed interval for nonionic surfactants. Van der Waals attraction, values and interface surfactant layer thickness are connected, reflecting the fact that lower values reduce interfacial tension better. This study also found that surfactant packing at the oil-water interface increases the order of the oil-solution ratio and the microemulsion values with polarity.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"101 31","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139135038","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

Evaluation of Drainage System of Light Rapid Transport (LRT) Depo – Kelapa Gading – Jakarta City 雅加达市 Kelapa Gading 轻轨（LRT）站排水系统评估

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-30 DOI: 10.5614/j.eng.technol.sci.2023.55.5.9

Joko Nugroho, M. Adityawan, Ana Nurganah Chaidar, Yadi Suryadi

{"title":"Evaluation of Drainage System of Light Rapid Transport (LRT) Depo – Kelapa Gading – Jakarta City","authors":"Joko Nugroho, M. Adityawan, Ana Nurganah Chaidar, Yadi Suryadi","doi":"10.5614/j.eng.technol.sci.2023.55.5.9","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.9","url":null,"abstract":"LRT Depo is a vital infrastructure in the operation of Jakarta’s LRT system. The LRT Depo is located in the Kelapa Gading area. Kelapa Gading is an inundation-prone area in Jakarta. Hence a drainage system should be prepared to manage surface runoff in the area to avoid additional runoff to the surrounding drainage system. In order to reduce runoff in Jakarta Special Province, the Governor of Jakarta has imposed a regulation on surface runoff management for every developed area. The runoff control measures, promoted in the regulation to be applied, are in the form of infiltration wells and storage ponds. The principle of reducing peak discharge by a possible storage system for LRT Depo was designed and applied to comply with regional regulations on rainwater control. The drainage system, initially based on the regulations, was also modeled in the Storm Water Management Modelling software (SWMM). This study evaluated the drainage system by elaborating the reduction of the peak discharge based on the simulation. A reduction of peak discharge was observed in the modeling results. The proposed runoff control at LRT Depo Kelapa Gading is a proper design of infrastructure development for a flood prone area.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" 29","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139141406","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

Thermodynamic Study on Decarbonization of Combined Cycle Power Plant 联合循环发电厂脱碳热力学研究

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-30 DOI: 10.5614/j.eng.technol.sci.2023.55.5.10

Azaria Haykal Ahmad, P. Darmanto, F. B. Juangsa

引用次数: 0

Feature Extraction Evaluation of Various Machine Learning Methods for Finger Movement Classification using Double Myo Armband 使用双妙臂章对用于手指运动分类的各种机器学习方法进行特征提取评估

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-30 DOI: 10.5614/j.eng.technol.sci.2023.55.5.8

Khairul Anam, Harun Ismail, F. S. Hanggara, Cries Avian, Safri Nahela, Muchamad Arif Hana Sasono

{"title":"Feature Extraction Evaluation of Various Machine Learning Methods for Finger Movement Classification using Double Myo Armband","authors":"Khairul Anam, Harun Ismail, F. S. Hanggara, Cries Avian, Safri Nahela, Muchamad Arif Hana Sasono","doi":"10.5614/j.eng.technol.sci.2023.55.5.8","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.8","url":null,"abstract":"The deployment of electromyography (EMG) signals attracts many researchers since it can be used in decoding finger movements for exoskeleton robotics, prosthetics hand, and powered wheelchair. However, decoding any movement is a challenging task. The success of EMG signals' use lies in the appropriate choice of feature extraction and classification model, especially in the feature extraction process. Therefore, this study evaluates an eight-feature extraction evaluation on various machine learnings such as the Support Vector Machine (SVM), k-Nearest Neighbor (k-NN), Decision Tree (DT), Naïve Bayes (NB), and Quadratic Discriminant Analysis (QDA). The dataset from four intact subjects is used to classify twelve finger movements. Through 5 cross-validations, the result shows that almost all feature extractions combined with SVM outperform other combinations of features and classifiers. Mean Absolute Value (MAV) as a feature and SVM as a classifier highlight the best combination with an accuracy of 94.01%.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" 60","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139139395","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

Influence of Opening and Boundary Conditions on the Behavior of Concrete Hollow Block Walls: Experimental Results 开口和边界条件对混凝土空心砌块墙行为的影响：实验结果

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-29 DOI: 10.5614/j.eng.technol.sci.2023.55.5.6

K. A. Musa, Badorul Hisham Abu Bakar, Ufuoma Joseph Udi

{"title":"Influence of Opening and Boundary Conditions on the Behavior of Concrete Hollow Block Walls: Experimental Results","authors":"K. A. Musa, Badorul Hisham Abu Bakar, Ufuoma Joseph Udi","doi":"10.5614/j.eng.technol.sci.2023.55.5.6","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.6","url":null,"abstract":"The assembled pattern of concrete hollow building blocks contributes to the wall structure’s durability. This paper presents experimental research on the behavior of concrete hollow block walls. The experimental work included testing four concrete hollow block wall panels with different opening sizes. Constant vertical axial load was applied on top of the wall panels until failure, characterized by boundary conditions. The results showed that the presence of openings reduced the strength of the wall panels; it was possible to observe these differences since the opening area was between 20 and 40% of the gross wall panel area. It was also observed that while the opening percentage had a significant impact on the strength of the wall, the boundary conditions had a less substantial impact on the overall wall response. A high localized concentration of stress was observed at the top corners of the wall panels and a high stress concentration was also observed along the vertical sides of the openings. Variation in the number and the shape of the openings often changed the failure mechanism in the wall panels, even when the percentage area of the opening remained constant. The wall panels A1-B2 reached peak stress levels at 0.019 MPa, 0.036 MPa, 0.056 MPa, and 0.030 MPa. The equivalent peak strains were 0.018, 0.011, 0.012, and 0.010 respectively. This research established significant data and is expected to help in the design and analysis of axially loaded unreinforced masonry walls with openings.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" 16","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139143235","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 Effect of Coconut Powder on Asphalt Binder Performance under Laboratory Conditions 实验室条件下椰子粉对沥青粘结剂性能的影响

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-29 DOI: 10.5614/j.eng.technol.sci.2023.55.5.7

R. Yousif, S. Tayh, Abbas F. Jasim

{"title":"The Effect of Coconut Powder on Asphalt Binder Performance under Laboratory Conditions","authors":"R. Yousif, S. Tayh, Abbas F. Jasim","doi":"10.5614/j.eng.technol.sci.2023.55.5.7","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.7","url":null,"abstract":"Bituminous concrete mixture is the most widely used structural layer in flexible pavements. The surface layer of the paving is exposed to repeated loads in addition to changes in temperature, especially during the summer, when the temperature approaches the softness point of the asphalt binder, and therefore, it is subject to multiple types of failure, especially rutting. The properties of asphalt binder and asphalt mixtures can be improved by using various additives. Coconut shell powder, made from the dried husk of coconut fruit, is a popular addition in many industries. As a result of its high strength and stability, this waste material can be recycled into functional structural components such as composite material reinforcement. This study was conducted to evaluate the performance of coconut husk as very fine particles passing through sieve number 200 (0.075 mm) to modify the asphalt binder. The modifier was added at rates of (0, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10) by the weight of asphalt binder. Two asphalt binder types, 80/100 and 40/50 penetration grade, were used in this study. All asphalt samples were tested for penetration, softening point, rotational viscosity, and dynamic shear rheology. The results showed that the modified samples had better physical and rheological properties compared to the base asphalt binders. However, (7-8%) replacement of coconut husk powder, regardless of the base asphalt binder, yielded the best performance among the modified binders. In conclusion, coconut powder has significant potential as a road-building material due to its impact on the viability of the road construction sector","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"12 3","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145288","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 Risk of Failure Assessment in Bina Marga Standard Designed Prestressed Concrete Girder Bridges under B-WIM Load Measurement B-WIM 荷载测量下的 Bina Marga 标准设计预应力混凝土梁桥失效风险评估

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-28 DOI: 10.5614/j.eng.technol.sci.2023.55.5.5

Widi Nugraha, I. Sidi, M. Suarjana, Ediansjah Zulkifli

{"title":"The Risk of Failure Assessment in Bina Marga Standard Designed Prestressed Concrete Girder Bridges under B-WIM Load Measurement","authors":"Widi Nugraha, I. Sidi, M. Suarjana, Ediansjah Zulkifli","doi":"10.5614/j.eng.technol.sci.2023.55.5.5","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.5","url":null,"abstract":"The use of precast prestressed concrete girder bridges in Indonesia has been increasing rapidly due to their high quality, reliability, and faster construction on site. The girder components are typically designed for a specific bridge span and can be prefabricated. The Directorate General of Highways of the Ministry of PUPR (Bina Marga) has released a standard design for prestressed concrete girder bridges with a typical span of up to 40 m. This design is based on the bridge loading standard SNI 1725 2016, which determines the live traffic load through consensus due to limited data on actual traffic load measurement results. However, the Ministry of PUPR has been implementing actual traffic load measurements using weigh-in-motion (WIM) technology to directly measure the load of passing vehicles. In this study, a risk assessment of the failure risk of a standard Bina Marga bridge with a 40-m span prestressed concrete girder type was conducted based on B-WIM load measurements. The results of this assessment indicate that the standard Bina Marga bridge has a failure risk of 1.48 x 10-4, which is smaller than the acceptable risk of failure according to the AASHTO LRFD Bridge Design Specification as referenced in SNI 1725 2016.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"51 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139151796","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

A Comparative Study of Solid-State and Co-precipitation Methods for Synthesis of NMC622 Cathode Material from Spent Nickel Catalyst 利用废镍催化剂合成 NMC622 阴极材料的固态法与共沉淀法比较研究

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-22 DOI: 10.5614/j.eng.technol.sci.2023.55.5.4

E. Dyartanti, T. Paramitha, A. Jumari, Agus Purwanto, A. Nur, A. W. Budiman, S. S. Nisa

{"title":"A Comparative Study of Solid-State and Co-precipitation Methods for Synthesis of NMC622 Cathode Material from Spent Nickel Catalyst","authors":"E. Dyartanti, T. Paramitha, A. Jumari, Agus Purwanto, A. Nur, A. W. Budiman, S. S. Nisa","doi":"10.5614/j.eng.technol.sci.2023.55.5.4","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.4","url":null,"abstract":"Nickel, the main raw material for lithium-ion batteries (LIB), is currently the most in-demand metal. The rising need for nickel and current environmental concerns have underscored the importance of recycling waste metal to recover its value. Meanwhile, a significant secondary source with a high metal value is spent catalyst. In this context, the acid leaching method was used to recover nickel from spent catalyst. This study aimed to synthesize Lithium Nickel Manganese Cobalt Oxide 622 (NMC622) from spent catalyst. To determine the optimal method, a comparative analysis was conducted between solid-state and co-precipitation methods. Recycled spent nickel catalyst to be used for cathode material was examined by analytical methods, i.e., XRD, FTIR, SEM-EDX, and electrochemical performance testing. The XRD, FTIR, and SEM-EDX tests produced similar outcomes, consistent with previous reports. However, in the electrochemical test, the co-precipitation method showed a specific capacity two times higher than the solid-state method. The NMC622 from the co-precipitation method (NMC622-CP) yielded a specific discharge capacity of 132.82 mAh.g-1 at 0.1C, while the retention capacity was 70% for 50 cycles at 0.5C.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"13 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164746","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

Structural Analysis and Service Life Prediction of Rubberized Thin Surfacing Hot Mix Asphalt 橡胶薄层热拌沥青的结构分析和使用寿命预测

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-22 DOI: 10.5614/j.eng.technol.sci.2023.55.5.3

S. K. Nugroho, Ary Setyawan, Arif Budiarto

{"title":"Structural Analysis and Service Life Prediction of Rubberized Thin Surfacing Hot Mix Asphalt","authors":"S. K. Nugroho, Ary Setyawan, Arif Budiarto","doi":"10.5614/j.eng.technol.sci.2023.55.5.3","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.3","url":null,"abstract":"Rubberized thin surfacing hot mix asphalt (RTSHMA) is a type of flexible pavement that is currently being developed. It can provide the same good performance as asphalt concrete–wearing course (AC-WC). Based on previous research, the use of crumb rubber in the asphalt mixture can provide several advantages, such as increasing the flexibility of the mix so that the pavement is more resistant to cracking. Based on research showing the advantages of rubberized asphalt, the idea emerged to apply it in the field, namely on the Palur–Sragen City Boundary section as wearing course. The method of analysis in this study was modeling the pavement structure with the KENPAVE and BISAR 3.0 programs. The analysis results showed that the AC-WC model and RTSHMA model have the same good performance because both of them have a service life of more than twenty years, which is the standard for flexible pavements. However, RTSHMA has an advantage, i.e., the thickness layer is 25% thinner than AC-WC’s. With a thinner layer than AC-WC but the same good performance, RTSHMA is worth considering as an alternative pavement, especially for overlays.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"56 S3","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139166002","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

Microplastic Removal from Road Stormwater Runoff using Lab-scale Bioretention Cell 利用实验室规模的生物滞留池去除道路雨水径流中的微塑料

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Journal of Engineering and Technological Sciences Pub Date : 2023-12-07 DOI: 10.5614/j.eng.technol.sci.2023.55.5.2

Fathiya Mufidah, P. Soewondo

{"title":"Microplastic Removal from Road Stormwater Runoff using Lab-scale Bioretention Cell","authors":"Fathiya Mufidah, P. Soewondo","doi":"10.5614/j.eng.technol.sci.2023.55.5.2","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.2","url":null,"abstract":"Microplastic removal from stormwater runoff from roads is necessary to reduce the effect of microplastic pollution in water bodies. Bioretention is a potential technology to remove microplastics in stormwater runoff from roads. A lab-scale experiment was conducted to determine the efficiency, effect on vegetation and discharge variation, and the kinetics of microplastic removal from stormwater runoff from roads using a bioretention cell. The experiment was done using an artificial sample based on visual characterization of stormwater runoff from highways, commercial, and residential roads. The vegetations that were examined were Vetivera sp. and Hibiscus sp. The operational discharge was varied based on rainfall intensity categories. The result showed that the removal efficiency was in the range of 92.4 to 99.3% with a mean of 97.2%. Statistical analysis (α = 5%) showed that variation in vegetation and discharge had no significant effect on microplastic removal using bioretention. The first-order kinetic analysis showed that the kinetic removal constant of the bioretention with Vetivera sp., bioretention with Hibiscus sp., and bioretention without vegetation was 0.0356, 0.034, and 0.0327, respectively. These results indicate that bioretention with Hibiscus sp. removed more microplastics at greater depths than with Vetivera sp.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"51 2","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139185543","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