Dinamika Rekayasa最新文献

{"title":"Penggunaan Problem Based Learning (PBL) dalam Menulis Cerita Pendek Secara Blended Luring-Daring","authors":"Sumyati Sumyati","doi":"10.35194/jd.v6i1.2689","DOIUrl":"https://doi.org/10.35194/jd.v6i1.2689","url":null,"abstract":"This article aims to describe the use of the Problem-Based Learning (PBL) model in writing short stories in an offline-online blended manner in class IX of SMPN 3 Cileunyi. The research was conducted using the Classroom Action Research model carried out from September to December for the 2021/2022 school year. The number of students involved in the study was 52 people consisting of 30 men and 22 women. The results of the study show that the use of models is very appropriate and can overcome students' difficulties in writing short stories. This has been proven by the fact that their work resulting from online and offline learning has an average score of 71 out of the five aspects assessed, namely suitability of the theme and content, point of view, characters and plot, and language. In addition, it is known that there is a significant increase in learning outcomes between learning to write short stories before and after online-offline blended learning with the PBL model, namely 63.8 with a significance level of 90%.Keywords: blended; short story; offline and online, PBLABSTRAK:Artikel ini bertujuan akan mendeskripsikan penggunaan model Problem Based Learning (PBL) dalam menulis cerita pendek secara blended luring-daring di kelas IX SMPN 3 Cileunyi. Penelitian dilakukan dengan model Penelitian Tindakan Kelas  dilaksanakan bulan September hingga Desember tahun pelajaran 2021/2022. Jumlah peserta didik yang dilibatkan dalam penelitian sebanyak 52 orang terdiri atas laki-laki 30 dan perempuan 22 orang. Hasil penelitian menunjukkan bahwa penggunaan model sangat tepat dan dapat mengatasi kesulitan siswa dalam menulis cerita pendek. Hal ini terbukti karya mereka  yang dihasilkan dari pembelajaran daring dan luring beroleh nilai rata-rata sebesar 71 dari lima aspek yang dinilai, yaitu kesesuaian tema dengan isi, sudut pandang, tokoh dan karakter, alur, bahasa. Selain itu, diketahui terjadi peningkatan hasil belajar secara signifikan antara pembelajaran menulis cerita pendek sebelum dan sesudah pembelajaran blended daring–luring dengan model PBL yaitu 63,8 dengan taraf signifikansi sebesar 90%.    Kata Kunci: blended; cerita pendek;  luring dan daring, PBL","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75878244","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}

{"title":"Implementation of a Digital-Based Early Safety Warning System Program on a Branch Logistics Company in Jakarta","authors":"Syifa Ula Hamidya, Y. D. Ardyanto, Indriati Paskarni","doi":"10.21107/rekayasa.v15i3.18381","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.18381","url":null,"abstract":"","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76552543","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}

{"title":"Model Penilaian Strategi Pertahanan Matra Laut Negara Kepulauan Berbasis System Dynamic","authors":"Richard Martin, Amin Setyo Laksono, Harsuko Riniwati, Setyo Widagdo","doi":"10.21107/rekayasa.v15i3.15465","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.15465","url":null,"abstract":"","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78915051","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}

{"title":"Analisis Environmental-DNA (E-DNA) Untuk Estimasi Jumlah Total Bakteri Pada Air Kolam dengan Sistem Recirculation Aquaculture System (RAS","authors":"Andi Kurniawan, Abdul Aziz Amin, Guntur Guntur, Yogita Ayu Dwi Susanti, Adam Wiryawan, Zulkisam Pramudia, Hideki Okuda, A. Yanuar","doi":"10.21107/rekayasa.v15i3.16844","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16844","url":null,"abstract":"Catfish is an aquaculture commodity that has great potential to be developed in various regions in Indonesia. The success of catfish cultivation is primarily determined by creating a suitable environment for catfish. One way to create a suitable environment for catfish cultivation is the Recirculation Aquaculture System (RAS). In applying RAS, the presence of organic matter in the pond is controlled so the pond water can be reused. The presence of organic matter in pond water is determined mainly by the activity of bacteria in the water. These bacteria are actively involved in the pond's residual organic matter degradation process. Therefore, the total number of bacteria in the water can be one of the essential parameters in the RAS. The method widely used to calculate the abundance of bacteria is counting the number of bacteria based on bacterial culture method. However, the bacteria that can be cultured are only a small part of the bacteria in the water, so the abundance value obtained does not reflect the actual bacterial population. Therefore, it is necessary to analyze the abundance of bacteria using a method closer to the actual abundance value, such as the environmental DNA (eDNA) analysis. This study aims to analyze the abundance of bacteria in water in catfish aquaculture with RAS using the eDNA method. In addition, this study also analyzes water quality data (temperature, pH, Dissolved Oxygen). This study's results indicate that the water temperature value in catfish ponds ranges from 28.0 to 29.0 °C, the average pH value is 7.7, and the dissolved oxygen is between 5.7 - 6.2 mg/L. The water quality analysis results indicate that RAS can maintain optimum conditions in the catfish cultivation process. This study also showed that the total microbial abundance value at the beginning of cultivation was 1.68 × 107 cells/ml, and on day 30, it was 3.6 × 106 cells/ml. The dynamic of bacterial densities in this study may indicate that this system can maintain the stability of the microbial community.","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89433681","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}

{"title":"Sintesis Biokomposit Serat Sabut Kelapa dan Resin Poliester dengan Alkalisasi KOH Menggunakan Metode Hand Lay-Up","authors":"Khadijah Sayyidatun Nisa, Ella Melyna, Muhammad Rizky Mubarak Samida","doi":"10.21107/rekayasa.v15i3.16713","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16713","url":null,"abstract":"Development of bio-composite materials is growing rapidly, as these materials are light, strength, and have good resistance to corrosion. Moreover, bio-composite is one of many options to utilize agricultural waste. Polyester resin and coconut coir fiber can be utilized as matrix and filler for bio-composites. Alkalization is a method to obtain high quality cellulose from natural materials. The objective of this study is to examine the effect of KOH concentration on tensile strength and hardness of coconut coir fiber and polyester resin composite. The composite was successfully synthesized using hand lay-up method. Tensile strength and hardness tests were conducted to examine the composite’s physical properties, meanwhile Fourier Transform Infrared was employed to examine the material’s functional group. Bio-composite with coconut coir fiber and polyester ratio=40:60 yielded the highest tensile strength of 6.04 MPa. Furthermore, the composites that are synthesized with alkalization using KOH concentration of 5%wt, 10%wt, 15%wt, and no alkalization produced tensile strength 5.29, 6.92, 3.50, and 3.50 MPa respectively. In addition, the composites with KOH concentration of 5%wt, 10%wt, 15%wt, and no alkalization generated hardness 70, 73, 73, and 72 Shore D respectively. It can be concluded that the higher coconut coir fiber ratio, the higher the bio-composite’s tensile strength.","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90701033","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}

{"title":"Reduksi Kadar Oksalat dalam Umbi Porang Menggunakan Variasi Konsentrasi, Suhu dan Lama Perendaman dalam Larutan NaCl dan Akuades","authors":"Evril Pramestari Febrianti, R. Wardani","doi":"10.21107/rekayasa.v15i3.16804","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16804","url":null,"abstract":"","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"244 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74216155","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}

{"title":"Presensi Wireless Otomatis menggunakan Face Recognition","authors":"Firmansyah Adiputra, Faikul Umam","doi":"10.21107/rekayasa.v15i3.19762","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.19762","url":null,"abstract":"","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83587753","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}

{"title":"Kontrol Proportional Integral Derivative (PID) Sebagai Penstabil Tegangan pada Pembangkit Listrik Tenaga Hybrid","authors":"Muhammad Arif Al Aziz, Edy Prasetyo Hidayat, Ii Munadhif","doi":"10.21107/rekayasa.v15i3.16384","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16384","url":null,"abstract":"Around 66% of power plants in Indonesia are still sourced from coal and oil. On the other hand, Indonesia is rich in renewable energy potential but still has minimal utilization. Furthermore, the voltage at power plants that are small and less stable is also often a nuisance. Thus, an innovative hybrid, solar and hydroelectric power plant with a PID (Proportional Integral Derivative) based voltage stabilizer was created. PID-based voltage stabilizer control is generated in the form of PWM (Pulse Width Modulation). The results obtained in this study are PID control can produce the lowest voltage of 12.78 V and the highest voltage of 13.96 V with a setpoint of 13.4 V. The power generated from solar, hydro, and hybrid power plants is 11.8 Watts, 9.4 Watts, and 14.85 Watts. As for Charging the Battery, an increase of 2.72 V was obtained in 24 hours. As for the storage side, the Battery can supply a 15 watt incandescent lamp for 8 hours 55 minutes while leaving 20% of the total capacity.","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"180 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77311736","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}

{"title":"Modeling and Performance Testing of Anti-Lock Braking System (ABS) with Variation of Road Friction Coefficient to Braking Distance","authors":"M. Ulum, Desmas Arifianto Patriawan","doi":"10.21107/rekayasa.v15i3.16561","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16561","url":null,"abstract":"Automated vehicles are increasingly being researched and developed to reduce accident rates. The braking system is an integral part of the safety factor in the vehicle. One of the development systems in braking on vehicles is the Anti-lock Braking System (ABS). ABS is a vehicle b that prevents the wheels from locking during sudden braking. The research was conducted by modelling and designing the ABS braking system using SIMULINK software on MATLAB. This research was conducted by varying the coefficient of braking friction on dry asphalt, wet asphalt, dry soil, and wet soil by paying attention to the braking distance. In the first test, the first test of the non-ABS system sets 0.9. The results were obtained with the shortest braking distance of 20 meters and the farthest, 34.5 meters. As for the results with ABS, the shortest braking distance is 17.95 meters, and the farthest is 27 meters. From the analysis that has been done, it is found that the ABS is better than the non-ABS system. This is because ABS regulates the braking calliper and is adjusted to the vehicle’s dynamics instead of statically. When there is a difference in vehicle speed with different wheels too far (while the wheels will lock), the calliper on the brakes will open and close dynamically, unlike non-ABS","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88975816","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}

{"title":"Rancang Bangun Robot Pelayan Pasien Berbasis Internet of Things (Iot)","authors":"Saichu Amrulloh, Humaidillah Kurniadi Wardana","doi":"10.21107/rekayasa.v15i3.16477","DOIUrl":"https://doi.org/10.21107/rekayasa.v15i3.16477","url":null,"abstract":"The use of technology in the industrial revolution era and society is growing rapidly, especially the use of robots in facilitate human work. The function of robots is not only in the industrial world, but also in the world of health, for example robots to assist in serving patients. In supporting service activities in the robotic-based health world, a medical service robot design was made which aims to help reduce the duties of medical waiters while reducing the effects of COVID-19 transmission and analyze the results of designing and monitoring systems on medical service robots. The research method used is in the form of control testing and monitoring of medical service robots from the results of non-contact body temperature sensor measurements using a design tool that was made compared to standard measuring instruments and then calculating the percentage error of the measurement, hand sanitizer sensor reading distance, and connectivity esp32 cam, esp32 dev and camera 360 with wifi as well as connection time of esp32cam, esp32dev and camera 360 with wifi. The results of the measurement of the body temperature sensor have an error presentation rate ranging from 0.002% - 0.023%, the infrared sensor distance measurement reaches 14 cm and the robot connectivity distance gets good results with a distance of 505 cm, the connectivity speed of esp32 and IP cameras depends on the wifi speed used best results in this trial at 45 ms.","PeriodicalId":31510,"journal":{"name":"Dinamika Rekayasa","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77914958","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}