Journal of Engineering and Technological Sciences最新文献_第7页

The Evolution of Seismic Design Provisions in Indonesia’s National Bridge Code 印尼国家桥梁规范中抗震设计规定的演变

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Journal of Engineering and Technological Sciences Pub Date : 2023-01-02 DOI: 10.5614/j.eng.technol.sci.2022.54.6.14

Veby Citra Simanjuntak, I. Imran, M. Moestopo, H. Setio

{"title":"The Evolution of Seismic Design Provisions in Indonesia’s National Bridge Code","authors":"Veby Citra Simanjuntak, I. Imran, M. Moestopo, H. Setio","doi":"10.5614/j.eng.technol.sci.2022.54.6.14","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.14","url":null,"abstract":"To accommodate increased seismic hazards in Indonesia, provisions regarding structural details on seismic regulations have been tightened. In this paper, the variations in seismic hazard and detailing requirements from bridge code era before 1990 to the present was provided. To examine the bridge performance, pushover analysis was carried out based on the latest bridge code SNI 2833:2016/Seismic Map 2017. From the analysis results, the performance of older bridges would typically be less than more recently designed structures. The performance level of the bridge in the era before SNI 2833:2016/Seismic Map 2017 will be Operational-Life Safety (LS) whereas the performance level of the bridge designed with SNI 2833:2016 will be Elastic – Operational. Referring to NCHRP 949 for bridge performance level evaluation, results show that the performance level of the bridge still satisfies the requirement, which is Life Safety under upper-level earthquake. Therefore, the existing bridge shows adequate capacity under the current seismic load Seismic Map 2017 (7% probability of exceedance in 75 years (RP= 1000 years)). Evaluation of seismic vulnerability needs to be done to ensure the safety of the existing bridges in Indonesia, most of which are located in earthquake-prone areas, especially those that were designed with older version regulations.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48124359","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

Simulation Study on Hypervelocity Penetration of Lab Scaled Shape Charge Mechanism 实验室尺度聚能药超高速侵彻机理的仿真研究

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-31 DOI: 10.5614/j.eng.technol.sci.2022.54.6.13

Khairul H. Kamarudin, A. Zaidi, A. Hilmi, M. Abdullah, N. Nor, Ariffin Ismail, M. A. Yusof, S. Mohideen

{"title":"Simulation Study on Hypervelocity Penetration of Lab Scaled Shape Charge Mechanism","authors":"Khairul H. Kamarudin, A. Zaidi, A. Hilmi, M. Abdullah, N. Nor, Ariffin Ismail, M. A. Yusof, S. Mohideen","doi":"10.5614/j.eng.technol.sci.2022.54.6.13","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.13","url":null,"abstract":"Shaped charge (SC) is a mechanism used by defence industries as anti-armored weapon to penetrate armored plates. Numerous studies have been conducted on the shaped charged effects. However, experimental studies are limited due to great safety requirement and limited access to high grade explosive. Due to these limitations, an experimental study on a small-scale shaped charge mechanism (SCM) penetration blast test was conducted against five (5) types of target materials. The experimental data is then verified by simulation to proof that it can be used to predict the SC penetration data. This paper intent to present a comparative study on the effect of shaped charge blast conducted by simulation with the actual experimental results. In order to conduct this study, a 2D AUTODYN software were used to develop the SC blast model against five (5) types of target materials. This study concludes that the 2D AUTODYN simulations results can predict the hypervelocity penetration for all target materials compared to the experimental test with an average difference of 9.1 %.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42386220","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 Cyclic Impact Loads on Rock Properties 循环冲击荷载对岩石特性的影响

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-31 DOI: 10.5614/j.eng.technol.sci.2022.54.6.11

G. Simangunsong, Y. Safitri

引用次数: 0

Brine Evaporation Modeling in WAIV System Using Penman, Priestley-Taylor, and Harbeck Models 基于Penman、Priestley-Taylor和Harbeck模型的WAIV系统盐水蒸发建模

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-31 DOI: 10.5614/j.eng.technol.sci.2022.54.6.9

H. Santoso, Dwiki Eka Putra, Giovanni Angelina, Yansen Hartanto, J. Witono, K. C. Wanta

{"title":"Brine Evaporation Modeling in WAIV System Using Penman, Priestley-Taylor, and Harbeck Models","authors":"H. Santoso, Dwiki Eka Putra, Giovanni Angelina, Yansen Hartanto, J. Witono, K. C. Wanta","doi":"10.5614/j.eng.technol.sci.2022.54.6.9","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.9","url":null,"abstract":"Indonesia is a maritime country with a vast ocean area. Indonesia has high potential to produce salt because it has a lot of saltwater resources. When sea salt is harvested, seawater evaporates from a concentration of 3.5°Be to 29°Be. Evaporation can be affected by several factors, such as air temperature, wind speed, water vapor pressure, humidity, radiation, geographical location, time interval, and season. Many modifications have been made to increase the evaporation rate in salt production. One of them is the WAIV (Wind-Aided Intensified eVaporation) method. WAIV evaporation systems utilize sunlight and wind to accelerate the evaporation rate. The modeling in this study was adjusted to the environmental conditions in the case study for which it was necessary to determine new parameter values for the existing models. The Penman, Priestley-Taylor, and Harbeck models were used. The Harbeck model has been studied in previous studies, which were used as a reference in the present study. This study first determined and then validated the parameter values obtained. A simulation of the evaporation rate was conducted in a different place, namely Kupang, East Nusa Tenggara, Indonesia using Meteorology, Climatology, and Geophysical Agency (Indonesian: Badan Meteorologi, Klimatologi, dan Geofisika / BMKG) data.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47486398","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 Pt Depositing Methods (Chemical Reduction vs Photo-Assisted Deposition) onto TiO2 Nanoparticle for Hydrogen Photo-Production 用于氢光生产的TiO2纳米粒子上Pt沉积方法（化学还原与光辅助沉积）的比较研究

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-31 DOI: 10.5614/j.eng.technol.sci.2022.54.6.12

R. Ratnawati, S. Slamet, V. Wongso, J. Gunlazuardi, M. Ibadurrohman

{"title":"A Comparative Study of Pt Depositing Methods (Chemical Reduction vs Photo-Assisted Deposition) onto TiO2 Nanoparticle for Hydrogen Photo-Production","authors":"R. Ratnawati, S. Slamet, V. Wongso, J. Gunlazuardi, M. Ibadurrohman","doi":"10.5614/j.eng.technol.sci.2022.54.6.12","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.12","url":null,"abstract":"In this paper, we report a comparative study on the methods (chemical reduction and photo-assisted deposition) of incorporating Pt onto TiO2 nanoparticles (TNP) for H2 generation. The phase structure of photocatalysts was scrutinized utilizing TEM and XRD. The degree of dispersion of Pt on the TNP is measured by a pulse chemisorption technique, using TPDRO equipment. Results provided by TEM images, EDX spectra, elemental mapping, and AAS confirmed the successful deposition of Pt on TNP. XRD patterns confirm an anatase and rutile crystallite structure, while UV-vis spectra show the reduction of bandgap from a typical value of 3.2 eV to ca. 2.9 eV. It is found that there is a correlation between the amount of Pt deposited on TNP and Pt dispersion with the H2 generation. The chemical reduction method offered a higher degree of Pt deposition, resulting in a 2.75 times larger amount of deposited Pt as compared to that resulted from photodeposition. This feature is perceived to contribute higher H2 yield (3283 µmol) at 1 w% of Pt loading","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42804356","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

Study of COVID-19 Health Protocol Standards in Construction Industry of Indonesia 印度尼西亚建筑业新冠肺炎健康协议标准研究

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-31 DOI: 10.5614/j.eng.technol.sci.2022.54.6.10

Ratih Dewi Shima, I. Mahani, K. Pribadi, Kevin Andika Hartono

{"title":"Study of COVID-19 Health Protocol Standards in Construction Industry of Indonesia","authors":"Ratih Dewi Shima, I. Mahani, K. Pribadi, Kevin Andika Hartono","doi":"10.5614/j.eng.technol.sci.2022.54.6.10","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.10","url":null,"abstract":"Due to the increase in GNI per capita, the Indonesian government has launched its national economic recovery program in response to the COVID-19 emergency crisis, known as the New Normal and ordered to partially resume on-hold infrastructure projects followed by the implementation of a new, integrated COVID-19 health protocol. This research presents a study of health protocol standard implementation in the construction industry with the aim of formulating recommendations for minimum criteria elements that can be used for construction services companies at all levels. The domain-taxonomy analysis approach was used as the research method: the ISO/PAS 45005:2020 and ILO standards were adapted to Ministerial Regulation of PUPR No. 10 Year 2020. A gap analysis was conducted with Singapore, Malaysia, and Australia. The analysis generated four segregated main groups of elements with level-2 sub criteria. The main groups of elements were: Planning, Prevention, Handling, and Control and Evaluation. These criteria were validated and implemented in a case study of state-owned construction enterprises, here called PT. X and PT. Y, with large, qualified construction companies. From the implementation analysis it was found that PT. X and PT. Y had implemented the minimum criteria of the COVID-19 health protocol for construction workers very well.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48369241","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

Design and Development of a Multi-Sided Tabletop Augmented Reality 3D Display Coupled with Remote 3D Imaging Module 结合远程三维成像模块的多面桌面增强现实三维显示器的设计与开发

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-26 DOI: 10.5614/j.eng.technol.sci.2022.54.6.6

Muhammad Saad, Shabab Iqbal, Shoaib R. Soomro

{"title":"Design and Development of a Multi-Sided Tabletop Augmented Reality 3D Display Coupled with Remote 3D Imaging Module","authors":"Muhammad Saad, Shabab Iqbal, Shoaib R. Soomro","doi":"10.5614/j.eng.technol.sci.2022.54.6.6","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.6","url":null,"abstract":"This paper proposes a tabletop augmented reality (AR) 3D display paired with a remote 3D image capture setup that can provide three-dimensional AR visualization of remote objects or persons in real-time. The front-side view is presented in stereo-3D format, while the left-side and right-side views are visualized in 2D format. Transparent glass surfaces are used to demonstrate the volumetric 3D augmentation of the captured object. The developed AR display prototype mainly consists of four 40 × 30 cm2 LCD panels, 54% partially reflective glass, an in-house developed housing assembly, and a processing unit. The capture setup consists of four 720p cameras to capture the front-side stereo view and both the left- and right-side views. The real-time remote operation is demonstrated by connecting the display and imaging units through the Internet. Various system characteristics, such as range of viewing angle, stereo crosstalk, polarization perseverance, frame rate, and amount of reflected and transmitted light through partially reflective glass, were examined. The demonstrated system provided 35% optical transparency and less than 4% stereo crosstalk within a viewing angle of ±20 degrees. An average frame rate of 7.5 frames per second was achieved when the resolution per view was 240 × 240 pixels.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42481456","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

Stiffness and Creep Properties of HRS-BC Powered by Palm Shell Gasification in Dryer Unit 干燥装置中棕榈壳气化HRS-BC的刚度和蠕变特性

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-26 DOI: 10.5614/j.eng.technol.sci.2022.54.6.5

Intan Devi Nataliasari, S. H. Pranolo, F. P. Pramesti, A. Setyawan

引用次数: 1

Mobile Rice Husk Gasifier Performance and Techno-Economic Analysis as Micro Scale Power Generation: Modeling and Experiment 微型发电移动式稻壳气化炉性能及技术经济分析:模型与实验

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-26 DOI: 10.5614/j.eng.technol.sci.2022.54.6.8

S. Pertiwi, Yohanes Bobby, Marcellino Lorenzo, H. Dafiqurrohman, A. Surjosatyo

引用次数: 0

Effect of Alkaline Treatment on Physical and Tensile Properties of Areca Leaf Sheaths (ALSs) used for Biodegradable ALS Plate Production 碱性处理对制备生物降解板用槟榔叶鞘物理和拉伸性能的影响

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Journal of Engineering and Technological Sciences Pub Date : 2022-12-26 DOI: 10.5614/j.eng.technol.sci.2022.54.6.7

Pasuta Sungsee, Narita Khundamri, W. Wongklang, Anurak Tripetch, Paemika Saetiaw, Suwat Rattanapan

{"title":"Effect of Alkaline Treatment on Physical and Tensile Properties of Areca Leaf Sheaths (ALSs) used for Biodegradable ALS Plate Production","authors":"Pasuta Sungsee, Narita Khundamri, W. Wongklang, Anurak Tripetch, Paemika Saetiaw, Suwat Rattanapan","doi":"10.5614/j.eng.technol.sci.2022.54.6.7","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.7","url":null,"abstract":"This research evaluated the possibility of alkaline treatment to solve the problem of molding due to moisture during storage of areca leaf sheaths (ALSs) to be used for biodegradable ALS plate production. The effect of alkaline treatment on the properties of ALSs was studied. Sodium hydroxide (NaOH) and sodium bicarbonate (NaHCO3) were used as chemicals for surface treatment. The solution of NaOH and NaHCO3 was varied at 1%, 3%, and 5% w/v. Surface treatment with NaOH and NaHCO3 partially removed hemicellulose, cellulose, lignin, and impurities from the surface of the ALSs and increased the moisture resistance property of the ALSs. Treatment with NaOH made the ALSs’ surface rougher, whereas treatment with NaHCO3 had no effect on the surface of the ALSs. The decomposition temperature (Td2) of the NaOH-treated ALSs decreased by approximately 7.0 to 10.5%, while for the NaHCO3-treated ALSs it changed only slightly. The overall tensile properties of the NaOH-treated ALSs were better than those of the NaHCO3-treated ALSs. The surface treatment with 1% NaOH and 1% NaHCO3 increased the tensile modulus by 20.5% and 6.2%, respectively, as compared with the nontreated ALS. It was found that surface treatment with 1% NaOH and 1% NaHCO3 could create suitable conditions for ALS plate production. This work is a preliminary study; more research still needs to be done.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42642138","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