Journal of Engineering and Technological Sciences最新文献_第2页

Effect of Shot Peening Parameters on PLA Parts Manufactured with Fused Deposition Modeling 喷丸强化参数对利用熔融沉积模型制造的聚乳酸部件的影响

IF 0.9

Journal of Engineering and Technological Sciences Pub Date : 2023-12-07 DOI: 10.5614/j.eng.technol.sci.2023.55.5.1

H. Herianto, Hasan Mastrisiswadi, Andri Nasution, S. I. Atsani

{"title":"Effect of Shot Peening Parameters on PLA Parts Manufactured with Fused Deposition Modeling","authors":"H. Herianto, Hasan Mastrisiswadi, Andri Nasution, S. I. Atsani","doi":"10.5614/j.eng.technol.sci.2023.55.5.1","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.5.1","url":null,"abstract":"Fused deposition modeling (FDM) is a technology with potential benefits such as material versatility, user-friendliness, and cost-effectiveness. However, the mechanical properties of FDM-printed specimens are relatively low. To address this issue, post-processing techniques such as shot peening can be employed. Shot peening is utilized as a post-treatment for metal-based and ABS materials, but its application to PLA material has not been explored yet. This study aimed to evaluate the effect of shot peening on the mechanical properties of FDM-printed PLA samples. A full factorial experimental design was employed with shot peening speed, duration, and number of outer shells as parameters. The tensile strength of 72 samples after the shot peening process was measured and evaluated. Analysis of variance (ANOVA) revealed that all parameters had a significant influence on tensile strength. Additionally, the interaction of speed*time and speed*number of shells also had a significant influence. Meanwhile, the interaction of time*number of shells and speed*time*number of shells had no significant influence. The findings of this study demonstrate the potential of post-processing techniques to enhance the mechanical strength of FDM components, particularly those composed of PLA material.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"23 10","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138594155","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

2-Dimensional Materials for Performance Enhancement of Surface Plasmon Resonance Biosensor: Review Paper 用于提高表面等离子体共振生物传感器性能的二维材料：综述论文

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Journal of Engineering and Technological Sciences Pub Date : 2023-11-28 DOI: 10.5614/j.eng.technol.sci.2023.55.4.10

Chandra Wulandari, N. L. W. Septiani, N. Nugraha, Ahmad Nuruddin, B. Yuliarto

{"title":"2-Dimensional Materials for Performance Enhancement of Surface Plasmon Resonance Biosensor: Review Paper","authors":"Chandra Wulandari, N. L. W. Septiani, N. Nugraha, Ahmad Nuruddin, B. Yuliarto","doi":"10.5614/j.eng.technol.sci.2023.55.4.10","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.10","url":null,"abstract":"Surface plasmon resonance (SPR)--based biosensors compete and excel among optical biosensors because of exceptional features such as high sensitivity, label-free, and real-time measurement, allowing the observation of molecular binding kinetics. In SPR biosensors and other biosensor techniques, surface functionalization and bioreceptor attachment are effective strategies to improve sensor performance. The application of an appropriate immobilization matrix for the bioreceptor is an essential step in maximizing the absorption of the bioreceptor on the sensor surface, thereby improving a specific target-sensor interaction. Furthermore, the materials should provide excellent optical properties to enhance the response signal. The high surface-to-volume ratio and high optical absorption of 2D materials qualify these requirements, thus promising advancements for SPR biosensors. This article reviews the recent SPR biosensor study with the use of the 2D materials family to improve the sensor performance, including graphene, transition metal dichalcogenides (TMDCs), MXene, black phosphorus (BP), perovskite, and boron nitride (BN). The materials properties and enhancement mechanisms of different 2D materials are discussed comprehensively. This review was expected to provide a future perspective and design approach for 2D materials-based SPR biosensors.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"51 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139224086","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

Advancements, Challenges, and Future Directions in Rainfall-Induced Landslide Prediction: A Comprehensive Review 降雨诱发滑坡预测的进展、挑战和未来方向：全面回顾

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Journal of Engineering and Technological Sciences Pub Date : 2023-11-22 DOI: 10.5614/j.eng.technol.sci.2023.55.4.9

Do Van Vung, The Viet Tran, Nguyen Duc Ha, Nguyen Huy Duong

{"title":"Advancements, Challenges, and Future Directions in Rainfall-Induced Landslide Prediction: A Comprehensive Review","authors":"Do Van Vung, The Viet Tran, Nguyen Duc Ha, Nguyen Huy Duong","doi":"10.5614/j.eng.technol.sci.2023.55.4.9","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.9","url":null,"abstract":"Rainfall-induced landslides threaten lives and properties globally. To address this, researchers have developed various methods and models that forecast the likelihood and behavior of rainfall-induced landslides. These methodologies and models can be broadly classified into three categories: empirical, physical-based, and machine-learning approaches. However, these methods have limitations in terms of data availability, accuracy, and applicability. This paper reviews the current state-of-the-art of rainfall-induced landslide prediction methods, focusing on the methods, models, and challenges involved. The novelty of this study lies in its comprehensive analysis of existing prediction techniques and the identification of their limitations. By synthesizing a vast body of research, it highlights emerging trends and advancements, providing a holistic perspective on the subject matter. The analysis points out that future research opportunities lie in interdisciplinary collaborations, advanced data integration, remote sensing, climate change impact analysis, numerical modeling, real-time monitoring, and machine learning improvements. In conclusion, the prediction of rainfall-induced landslides is a complex and multifaceted challenge, and no single approach is universally superior. Integrating different methods and leveraging emerging technologies offer the best way forward for improving accuracy and reliability in landslide prediction, ultimately enhancing our ability to manage and mitigate this geohazard.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139247317","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

Performance of Moving Bed Biofilm Reactor Integrated Septic Tank in Treating Office Building Wastewater 移动床生物膜反应器集成化粪池处理办公楼污水的性能

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Journal of Engineering and Technological Sciences Pub Date : 2023-11-22 DOI: 10.5614/j.eng.technol.sci.2023.55.4.8

A. Setiyawan, Farisah Inarah Rahmat Hasby, Va Vandith, P. Soewondo, C. Yoshimura, D. W. Putri

{"title":"Performance of Moving Bed Biofilm Reactor Integrated Septic Tank in Treating Office Building Wastewater","authors":"A. Setiyawan, Farisah Inarah Rahmat Hasby, Va Vandith, P. Soewondo, C. Yoshimura, D. W. Putri","doi":"10.5614/j.eng.technol.sci.2023.55.4.8","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.8","url":null,"abstract":"This research aimed to find the effect of initial concentration and hydraulic retention time (HRT) on modified septic tank (MST) performance in treating wastewater from an office building. The synthetic wastewater used had an average COD:TN:TP ratio of 84:28:1, adjusted to office building wastewater characteristics. The experiment was executed under steady conditions using three variations of HRT (12, 24, and 36 hours) and different initial concentrations of COD (106, 252 and 432 mg COD/L), TN (35, 85 and 146 mg N/L) and TP (1.26, 3 and 5.14 mg P/L). The result showed that the MST removed 82% to 92% of COD, 41% to 60% of TN, 45% to 61% of NH4, and 39% to 55% of TP. The maximum removal was achieved at 36 h of HRT, COD:TN (3:1), and COD:TP (84:1). One-way ANOVA showed that the initial concentration and HRT had significant effects on the performance of MST (p < 0.05). This suggests that appropriate control of the initial concentration and HRT in the MST can effectively remove organics and nutrients from office building wastewater.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"38 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139249534","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

Photocatalytic Simulation of Phenol Waste Degradation Using Titanium Dioxide (TiO2) P25-Based Photocatalysts 二氧化钛(TiO2) p25基光催化剂光催化降解苯酚废物的模拟

Journal of Engineering and Technological Sciences Pub Date : 2023-10-31 DOI: 10.5614/j.eng.technol.sci.2023.55.4.6

Wibawa Hendra Saputera, Jeffry Jaya Pranata, Reynaldo Jonatan, Pramujo Widiatmoko, Dwiwahju Sasongko

{"title":"Photocatalytic Simulation of Phenol Waste Degradation Using Titanium Dioxide (TiO2) P25-Based Photocatalysts","authors":"Wibawa Hendra Saputera, Jeffry Jaya Pranata, Reynaldo Jonatan, Pramujo Widiatmoko, Dwiwahju Sasongko","doi":"10.5614/j.eng.technol.sci.2023.55.4.6","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.6","url":null,"abstract":"Phenol waste treatment is vital in industries such as polymer production, coal gasification, refinery, and coke production. Photocatalytic technology using semiconductor materials offers an effective and ecofriendly approach to degrade phenol. TiO2 P25 is a widely used photocatalyst, known for its cost-effectiveness, favorable optical and electronic properties, high photoactivity, and photostability. The PHOTOREAC application, a recently developed MATLAB-based software, simulates the degradation of phenol using visible light. A study that combines existing literature and research revealed that pH significantly influences photocatalytic activity, with an optimum pH of 7 for TiO2 P25-mediated phenol degradation. The recommended photocatalyst concentration ranged from 0 to 10 g/L for reactor volumes between 25 and 60 mL, and from 0 to 5 g/L for 100-mL reactors. Phenol wastewater volume and light intensity also impact degradation efficiency. Adequate oxygen supply, achieved through bubbling and mixing, is essential for the formation of radical compounds. The Ballari kinetic model proved to be the most suitable for phenol degradation with TiO2 P25. Thus, by combining PHOTOREAC simulations with experimental data, the treatment process could be optimized to achieve higher degradation efficiency and estimate the treatment time for specific waste degradation levels. This study contributes to the advancement of phenol waste treatment and the development of improved photocatalytic wastewater treatment technologies.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"6 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135869320","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

Reducing Numerical Dispersion with High-Order Finite Difference to Increase Seismic Wave Energy 用高阶有限差分降低数值色散以增加地震波能量

Journal of Engineering and Technological Sciences Pub Date : 2023-10-31 DOI: 10.5614/j.eng.technol.sci.2023.55.4.5

Syamsurizal Rizal, Awali Priyono, Andri Dian Nugraha, Mochamad Apri, Mochamad Agus Moelyadi, David Prambudi Sahara

{"title":"Reducing Numerical Dispersion with High-Order Finite Difference to Increase Seismic Wave Energy","authors":"Syamsurizal Rizal, Awali Priyono, Andri Dian Nugraha, Mochamad Apri, Mochamad Agus Moelyadi, David Prambudi Sahara","doi":"10.5614/j.eng.technol.sci.2023.55.4.5","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.5","url":null,"abstract":"The numerical dispersion of 2D acoustic wave modeling has become an interesting subject in wave modeling in producing better subsurface images. Numerical dispersion is often caused by error accumulation with increased grid size in wave modeling. Wave modeling with high-order finite differences was carried out to reduce the numerical error. This study focused on variations in the numerical order to suppress the dispersion due to numerical errors. The wave equation used in modeling was discretized to higher orders for the spatial term, while the time term was discretized up to the second order, with every layer unabsorbed. The results showed that high-order FD was effective in reducing numerical dispersion. Thus, subsurface layers could be distinguished and observed clearly. However, from the modeling results, the wave energy decreased with increasing distance, so the layer interfaces were unclear. To increase the wave energy, we propose a new source in modeling. Furthermore, to reduce the computational time we propose a proportional grid after numerical dispersion has disappeared. This method can effectively increase the energy of reflected and transmitted waves at a certain depth. The results also showed that the computational time of high-order FD is relatively low, so this method can be used in solving dispersion problems.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"207 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135869824","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

Selection of Material and Manufacturing Technology for Batik Canting Stamps Based on Multi-Criteria Decision-Making Methods 基于多准则决策方法的蜡染印花材料选择与制造工艺

Journal of Engineering and Technological Sciences Pub Date : 2023-10-31 DOI: 10.5614/j.eng.technol.sci.2023.55.4.7

Joni Setiawan, Andi Sudiarso, Isananto Winursito, Muhammad Kusumawan Herliansyah

{"title":"Selection of Material and Manufacturing Technology for Batik Canting Stamps Based on Multi-Criteria Decision-Making Methods","authors":"Joni Setiawan, Andi Sudiarso, Isananto Winursito, Muhammad Kusumawan Herliansyah","doi":"10.5614/j.eng.technol.sci.2023.55.4.7","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.7","url":null,"abstract":"This study aimed to develop alternative materials and technologies for making canting stamps used in producing batik canting (stamped batik) to transfer hot wax from the pan to the fabric. Previous researchers have studied materials such as wood, aluminum, multiplex, acrylic, and acrylonitrile butadiene styrene (ABS). Manufacturing technologies have also been analyzed, including manual manufacturing, computer numerical control (CNC) milling, laser cutting, and additive manufacturing. However, none of these materials and technologies were considered suitable alternatives for copper canting stamps. This paper proposes Conductive ABS-Electroformed By Copper (CABS-EBC) through additive manufacturing and electroforming processes as alternative material for canting stamps. A multi-criteria decision-making (MCDM) approach was used to assess alternative materials and technologies. The alternatives and criteria were calculated using the Simple Additive Weighting (SAW), Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), and Preference Ranking Organization Method of Enrichment Evaluation (PROMETHEE) techniques. Besides this, assessment was also carried out based on expert opinions. The results showed that copper was the most suitable material, with Closeness = 1.000, Yi = 0.995, and Phi = +1.00. Meanwhile, CABS-EBC ranked second, with Closeness = 0.627, Yi = 0.864, and Phi = +0.50. The selected technology was additive manufacturing combined with electroforming, with Closeness = 0.700, Yi = 0.895, and Phi = +0.39. By using MCDM on the material-technology development candidates it was found that CABS-EBC processed with additive manufacturing is capable of substituting copper as a canting stamp material. It is expected that the production capacity of the traditional manufacturing process can be enhanced by adopting these new materials and technologies.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"42 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135863394","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 Material Science Behind Repetitive Hammering, Solution Annealing, and Tempering on Hadfield Steel 哈德菲尔德钢重复锤击、溶液退火和回火背后的材料科学

Journal of Engineering and Technological Sciences Pub Date : 2023-10-26 DOI: 10.5614/j.eng.technol.sci.2023.55.4.4

Ida Farida, Rochim Suratman

{"title":"The Material Science Behind Repetitive Hammering, Solution Annealing, and Tempering on Hadfield Steel","authors":"Ida Farida, Rochim Suratman","doi":"10.5614/j.eng.technol.sci.2023.55.4.4","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.4","url":null,"abstract":"The Hadfield steel used in this study contained 11 to 14% Mn and 1.1 to 1.4% C. Hadfield steel that underwent heat treatment showed insignificant differences in microstructure and hardness. On the other hand, Hadfield steel that was subjected to heat treatment combined with repetitive hammering exhibited changes in microstructure, as indicated by the presence of more and denser slip lines in accordance with an increased amount of deformation. The hardness value of the Hadfield steel also significantly increased. The slip lines discovered in the Hadfield steel that underwent solution annealing and tempering followed by repetitive hammering increased in number and appeared more compact than in the Hadfield steel without tempering. Additionally, the hardness value of the Hadfield steel with tempering was higher than that of the Hadfield steel without tempering. The strain values and thickness reduction results showed that the Hadfield steel subjected to tempering had higher strain and thickness reduction than the Hadfield steel without tempering. Higher strain and thickness reduction leads to higher hardness.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"12 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135013075","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

Machine Learning-based Indoor Positioning Systems Using Multi-Channel Information 基于多通道信息的机器学习室内定位系统

Journal of Engineering and Technological Sciences Pub Date : 2023-10-26 DOI: 10.5614/j.eng.technol.sci.2023.55.4.2

Shu-Hung Lee, Chia-Hsin Cheng, Tzu-Huan Huang, Yung-Fa Huang

引用次数: 0

Al-Cu Composite’s Springback in Micro Deep Drawing Al-Cu复合材料微拉深回弹性能研究

Journal of Engineering and Technological Sciences Pub Date : 2023-10-26 DOI: 10.5614/j.eng.technol.sci.2023.55.4.3

Julian Widiatmoko, Fanghui Jia, Zhengyi Jiang

{"title":"Al-Cu Composite’s Springback in Micro Deep Drawing","authors":"Julian Widiatmoko, Fanghui Jia, Zhengyi Jiang","doi":"10.5614/j.eng.technol.sci.2023.55.4.3","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.3","url":null,"abstract":"With the recent technological trend of miniaturization in manufacturing industries, the rise of micro forming operations such as micro deep drawing (MDD) is inevitable. On the other hand, the need of more advanced materials is essential to accommodate various applications. However, a major problem are size effects that make micro scale operations challenging. One of the most important behaviors affected by size effects is the springback phenomenon, which is the tendency of a deformed material to go back to its original shape. Springback can affect dimensional accuracy, which is very important in micro products. Thus, this paper investigated the springback behavior of Al-Cu composite in MDD operations. Micro cups were fabricated from blank sheet specimens using an MDD apparatus with variation of annealing holding time. The springback values were measured and compared to each other. The results showed that different grain sizes lead to variation in the amount of springback. However, unlike in single-element materials, the amount of springback in Al-Cu composite is not only related to the thickness to grain size (t/d) ratio. Another factor, i.e., the existence of an interfacial region between layers, alters the mechanical behavior of the composite.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":"31 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907654","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