Jurnal Teknologi-Sciences & Engineering最新文献_第7页

Pengaruh Penambahan Saccharomyces Cerevisiae dan Aspergillus Oryzae terhadap Karakteristik Eco-Enzyme serta Pengaplikasiannya dalam Pembuatan Sabun Padat Antiseptik 添加酿酒酵母和米曲霉对生态酶特性的影响及其在防腐固体砂生产中的应用

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3715

S. Safrida, S. Suryani, Zuhra Amalia

{"title":"Pengaruh Penambahan Saccharomyces Cerevisiae dan Aspergillus Oryzae terhadap Karakteristik Eco-Enzyme serta Pengaplikasiannya dalam Pembuatan Sabun Padat Antiseptik","authors":"S. Safrida, S. Suryani, Zuhra Amalia","doi":"10.30811/teknologi.v23i1.3715","DOIUrl":"https://doi.org/10.30811/teknologi.v23i1.3715","url":null,"abstract":"The production of eco-enzyme usually takes a long time for fermentation, which is three months using natural microbes found in fruit peels. This research is experimental by focusing on accelerating the production of the eco-enzyme using two types of microbes, namely saccharomyces cerevisiae and aspergillus oryzae whose mass is varied by 5 variations, and the fermentation time is set for 20 days. The results showed that the eco-enzyme made by adding microbes had the same characteristics as the natural fermentation eco-enzyme. Furthermore, the eco-enzyme obtained from the research was added as an antiseptic in making solid soap. From the test results, the best inhibitory power was obtained in the eco-enzyme with the addition of saccharomyces cerevisiae as much as 10 g and aspergillus oryzae as much as 25 g. The inhibitory power test was carried out by comparing the number of bacteria present on unwashed hands with hands that had been washed using soap. The test results showed the number of bacteria on unwashed hands was 85 CFU, which were washed using samples with aspergillus oryzae as much as 4 CFU, with saccharomyces cerevisiae as much as 2 CFU, this inhibition is better than commercial antiseptic soap with a total of 8 CFU","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43888778","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

Optimasi Kinerja Wellstream Cooler Sebagai Sistem Pendinginan Gas Alam dari Sumuran terhadap Pengaruh Laju Alir dan Perbedaan Suhu Lingkungan di Platform PHE NSO Offshore PHE NSO海洋平台上针对流体进料器和环境温差优化井流冷却器作为天然气源冷却系统

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3602

Teuku Tarich Akbar, Reza Fauzan, A. Putra

{"title":"Optimasi Kinerja Wellstream Cooler Sebagai Sistem Pendinginan Gas Alam dari Sumuran terhadap Pengaruh Laju Alir dan Perbedaan Suhu Lingkungan di Platform PHE NSO Offshore","authors":"Teuku Tarich Akbar, Reza Fauzan, A. Putra","doi":"10.30811/teknologi.v23i1.3602","DOIUrl":"https://doi.org/10.30811/teknologi.v23i1.3602","url":null,"abstract":"This gas source that comes from the bowels of the earth contains many impurities and heavy hydrocarbons, both of which must be separated or even eliminated. To purify the treated gas to prevent damage to process equipment or pipe clogging. The removal process includes H 2 S removal, CO 2 removal, oily water removal, mercury removal, and water content removal in natural gas. This study aims to determine the effect of flow rate and ambient temperature differences on the performance of the wellstream cooler and the level of efficiency of the heat transfer process in the wellstream cooler. Observations will be focused on the offshore platform wellstream cooler cooling system at PT. PHE NSO. Based on observational data, the results obtained using the Hysys method by entering the required data completely, Hysys will automatically perform calculations according to what is required and the calculation results will be plotted in graphical form. Heat transfer efficiency based on Hysys application calculations all show results of 99%. Thus it can be seen the effect of changes in flow rate and ambient temperature on the heat transfer process. The greater the flow rate, the greater the heat transfer that occurs and the higher the ambient temperature, the smaller the heat transfer occurs, so that the lower the ambient temperature, the more effective the heat transfer occurs.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43213179","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

Analisis Volume LNG Ideal untuk Cooling Down Fasilitas LNG Hub 分析LNG音量的理想音量，用于冷却Hub设施

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3687

Dhian Nugraha, Harunsyah Harunsyah, Munawar Munawar

{"title":"Analisis Volume LNG Ideal untuk Cooling Down Fasilitas LNG Hub","authors":"Dhian Nugraha, Harunsyah Harunsyah, Munawar Munawar","doi":"10.30811/teknologi.v23i1.3687","DOIUrl":"https://doi.org/10.30811/teknologi.v23i1.3687","url":null,"abstract":"The LNG Receiving Hub facility is an existing facility that has not been used for a long time. In order for this facility can be used again, all equipment and piping systems must first be conditioned to a temperature close to the operational temperature of LNG, which is -160 o C. The purpose of this approach is to determine the theoretical and actual volume of LNG used for the cooling down process of the LNG Hub facility, as well as to compare it with the cooling down process for the regasification facility. An analytical approach is used in this study to determine the ideal amount of LNG needed for cooling down the facility and compare it with the actual amount of LNG that is being used for cooling down the facility. From the results of the analysis, the theoretical LNG volume needed for cooling down the LNG Hub facility is 8,176 m 3 and the actual volume is 7,013.6620 m 3 , while the actual value for cooling down the regasification facility is 11,573.19 m 3 . The actual volume for the LNG Hub facility is smaller compared to regasification which can be caused by the smaller volume of pipelines and the difference in the cooling down mechanism in both facilities.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45833107","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

Analisis Termal Stainless Steel Ice Cubes dengan Menggunakan Sensor Termokopel DS18B20 Berbasis Arduino 基于Arduino的DS18B20终端传感器对不锈钢冰块终端的分析

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3839

Luthfi Luthfi

引用次数: 0

Perancangan Mesin Pencacah Limbah Kelapa Muda Secara Vertikal Menggunakan Metode Sintesis Pandangan 用视图综合法垂直设计小型工艺矫正机

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3781

Robert Napitupulu, S.ST., M.T., Yuli Dharta, Diviya Arsieka Putri, Devaned Parlindungan, A. Pratama, Clara Lavita Angelina

引用次数: 0

Antena Bowtie dengan Reflektor Parabola untuk Layanan Broadband Wireless Access 用于宽带无线接入服务的抛物面波蒂天线

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-20 DOI: 10.30811/teknologi.v23i1.3819

Munawar Munawar

引用次数: 0

ON THE SZEGED INDEX AND ITS NON-COMMUTING GRAPH 关于塞格指数及其非交换图

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-19 DOI: 10.11113/jurnalteknologi.v85.19221

N. I. Alimon, N. Sarmin, A. Erfanian

{"title":"ON THE SZEGED INDEX AND ITS NON-COMMUTING GRAPH","authors":"N. I. Alimon, N. Sarmin, A. Erfanian","doi":"10.11113/jurnalteknologi.v85.19221","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19221","url":null,"abstract":"In chemistry, the molecular structure can be represented as a graph. Based on the information from the graph, its characterization can be determined by computing the topological index. Topological index is a numerical value that can be computed by using some algorithms and properties of the graph. Meanwhile, the non-commuting graph is a graph, in which two distinct vertices are adjacent if and only if they do not commute, where it is made up of the non-central elements in a group as a vertex set. In this paper, the Szeged index of the non-commuting graph of some finite groups are computed. This paper focuses on three finite groups which are the quasidihedral groups, the dihedral groups, and the generalized quaternion groups. The construction of the graph is done by using Maple software. In finding the Szeged index, some of the previous results and properties of the graph for the quasidihedral groups, the dihedral groups, and the generalized quaternion groups are used. The generalisation of the Szeged index of the non-commuting graph is then established for the aforementioned groups. The results are then applied to find the Szeged index of the non-commuting graph of ammonia molecule.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45369420","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

IDENTIFICATION OF CHRYSOTILE IN BRAKE PADS AND LININGS FROM MALAYSIAN VEHICLES AND HEAVY VEHICLES BY USING POLARIZED LIGHT MICROSCOPE (PLM) 用偏光显微镜鉴定马来西亚车辆和重型车辆刹车片和刹车片中的温石棉

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-19 DOI: 10.11113/jurnalteknologi.v85.19440

Maryam Zahaba, Ungku Aida Farzana Ungku Azly, Nur Sarah Fatihah Tamsi, Saiful Arifin Shafiee, Hazrin Abdul Hadi, M. Yusof, Mohd Shukri MOHD ARIS, Mohd Norhafsam Maghpor, Nor Mohd Razif Norain

{"title":"IDENTIFICATION OF CHRYSOTILE IN BRAKE PADS AND LININGS FROM MALAYSIAN VEHICLES AND HEAVY VEHICLES BY USING POLARIZED LIGHT MICROSCOPE (PLM)","authors":"Maryam Zahaba, Ungku Aida Farzana Ungku Azly, Nur Sarah Fatihah Tamsi, Saiful Arifin Shafiee, Hazrin Abdul Hadi, M. Yusof, Mohd Shukri MOHD ARIS, Mohd Norhafsam Maghpor, Nor Mohd Razif Norain","doi":"10.11113/jurnalteknologi.v85.19440","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19440","url":null,"abstract":"Exposure to types of asbestos such as chrysotile and crocidolite increases respiratory disease risks such as lung cancer, mesothelioma, and asbestosis. Nevertheless, asbestos products banning in Malaysia is only limited to crocidolite as per stated in OSHA (Prohibition of Use of Substance) Order 1999, though other types are highly suspected to be found in asbestos-containing materials (ACM) like brake pads and linings. This study ascertains the presence of asbestos fibres, particularly chrysotile, in brake pads and linings used in Malaysia's vehicle and heavy vehicle sector. Seven different brake pads; three from vehicle brands, and four from heavy vehicle brands were collected by bulk sampling approaches from the market and field. Dust fibres were extracted using slow grinding method and analysed under Polarized Light Microscope (PLM). The fibre characteristics such as colour, morphology, pleochroism, extinction, and dispersion staining technique were examined, referring the National Institute for Occupational Safety and Health (NIOSH) Manual of Analytical Methods (NMAM) 9002. Additionally, the observed samples also were verified by an accredited lab to support the authenticity of the outcome. From the analysis and lab results, chrysotile fibres were consistently detected in all brake pad samples, fulfilling the fibre characteristics and positive elongation signs.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49422590","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 AND EVALUATION OF OPTIMIZED PV GENERATION IN THE DISTRIBUTION SYSTEM WITH VARYING LOAD DEMANDS 变化负荷需求下配电系统优化光伏发电的影响与评价

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-19 DOI: 10.11113/jurnalteknologi.v85.18684

Hanis Farhah Jamahori, M. Abdullah, Abid Ali

{"title":"IMPACT AND EVALUATION OF OPTIMIZED PV GENERATION IN THE DISTRIBUTION SYSTEM WITH VARYING LOAD DEMANDS","authors":"Hanis Farhah Jamahori, M. Abdullah, Abid Ali","doi":"10.11113/jurnalteknologi.v85.18684","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.18684","url":null,"abstract":"Most distributed renewable energy generation (DREG) planning studies are performed using a constant load model and a dispatchable generation unit. However, the renewable generation unit and load demand vary in real life, and the generation size at the peak demand varies accordingly with loading levels. Such considerations may lead to the erroneous conclusion: the power loss reduction and bus voltage improvement may not be optimal. Consequently, the generation unit must be adequately integrated to offer optimal capacity in the distribution system while considering non-constant load demand as a part of DREG planning. Therefore, the impact of integrating photovoltaic (PV) considering historical solar weather data and varying load demand for five different voltage-dependent load models is proposed in this study. Particle swarm optimization (PSO) is employed to find the optimal location and size of PV with the objective to minimize power losses in the distribution system using IEEE 33-bus and IEEE 69-bus test systems. The findings are evaluated based on the comparative analysis of power losses reduction, PV penetration level, power loss index, and voltage deviation index. Findings revealed that the proposed model is effective in determining the optimal location and size of PV with a significant reduction of power losses that varies between 13.84% to 32.71% in 33-bus, and between 18.56% to 43.80% in 69-bus. In addition, the improvement in minimum bus voltage and other performance indices are also significant.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43405126","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

KEYWORD SPOTTING SYSTEM WITH NANO 33 BLE SENSE USING EMBEDDED MACHINE LEARNING APPROACH 基于嵌入式机器学习的nano33ble意义关键词识别系统

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Jurnal Teknologi-Sciences & Engineering Pub Date : 2023-04-19 DOI: 10.11113/jurnalteknologi.v85.18744

Nurul Atikah Abbas, Mohd Ridzuan Ahmad

{"title":"KEYWORD SPOTTING SYSTEM WITH NANO 33 BLE SENSE USING EMBEDDED MACHINE LEARNING APPROACH","authors":"Nurul Atikah Abbas, Mohd Ridzuan Ahmad","doi":"10.11113/jurnalteknologi.v85.18744","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.18744","url":null,"abstract":"\u0000\u0000\u0000\u0000Due to the obvious advancement of artificial intelligence, keyword spotting has become a fast-growing technology that was first launched a few years ago by hidden Markov models. Keyword spotting is the technique of finding terms that have been pre-programmed into a machine learning model. However, because the keyword spotting system model will be installed on a small and resource-constrained device, it must be minimal in size. It is difficult to maintain accuracy and performance when minimizing the model size. We suggested in this paper to develop a TinyML model that responds to voice commands by detecting words that are utilized in a cascade architecture to start or control a program. The keyword detection machine learning model was built, trained, and tested using the edge impulse development platform. The technique follows the model-building workflow, which includes data collection, preprocessing, training, testing, and deployment. 'On,' 'Off,' noise, and unknown databases were obtained from the Google speech command database V1 and applied for training and testing. The MFCC was used to extract features and CNN was used to generate the model, which was then optimized and deployed on the microcontroller. The model's evaluation represents an accuracy of 84.51% based on the datasets. Finally, the KWS was successfully implemented and assessed on Arduino Nano 33 BLE Sense for two studies in terms of accuracy at three different times and by six different persons.\u0000\u0000\u0000\u0000","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45836353","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