Journal of Science Technology (JoSTec)最新文献

Modeling of the Fresh Fruit Bunches Collection and Transportation System with Agent-Based Simulation in Optimizing the Mode of Transportation on Oil Palm Industry 油棕产业运输方式优化中鲜果束集运系统的agent仿真建模

Journal of Science Technology (JoSTec) Pub Date : 2023-08-15 DOI: 10.55299/jostec.v5i1.475

Rizkha Rida

引用次数: 0

Impact of the fuel mixture ratio of AVGAS 100LL and RON 92 fuel on combustion characteristics avgas100ll与ron92燃料混合比例对燃烧特性的影响

Journal of Science Technology (JoSTec) Pub Date : 2023-08-11 DOI: 10.55299/jostec.v5i1.478

Sabam Danny, Sulung, D. Rumani, Ikhwanul Qiram, Muhammad Nur Cahyo, Hidayat Nasrullah, Untung Lestari, Nur Wibowo, Indonesia Banyuwangi

{"title":"Impact of the fuel mixture ratio of AVGAS 100LL and RON 92 fuel on combustion characteristics","authors":"Sabam Danny, Sulung, D. Rumani, Ikhwanul Qiram, Muhammad Nur Cahyo, Hidayat Nasrullah, Untung Lestari, Nur Wibowo, Indonesia Banyuwangi","doi":"10.55299/jostec.v5i1.478","DOIUrl":"https://doi.org/10.55299/jostec.v5i1.478","url":null,"abstract":"AVGAS 100LL is an aviation fuel used in piston engine aircraft, particularly in training aircraft such as the Cessna 172S with Lycoming engines. The use of lead in this fuel can have various health-related concerns. Therefore, reducing the use of leaded fuel has become a solution to address these issues. This study aimed to investigate the combustion characteristics of AVGAS fuels, including AVGAS 100%, AVGAS 75% + PERTAMAX 25%, and AVGAS 50% + PERTAMAX 50%. The research involved conducting combustion tests using a Bunsen burner. The results showed that the addition of PERTAMAX to AVGAS significantly influenced the temperature, color, flame height, and flame area produced. The temperature values were higher for AVGAS 100% compared to AVGAS mixed with PERTAMAX. On the other hand, the flame height and flame area were lower for AVGAS 100% compared to the blended fuels. These findings indicate that the addition of PERTAMAX affects the combustion characteristics of AVGAS fuels. Further studies are recommended to explore and expand our understanding of the effects of blending AVGAS with alternative fuels.","PeriodicalId":260226,"journal":{"name":"Journal of Science Technology (JoSTec)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127261710","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

Effect of Cessna 172S Aircraft Engine Vibration on the ground on Aviator Academy Pilots 塞斯纳172S飞机发动机地面振动对飞行员学院飞行员的影响

Journal of Science Technology (JoSTec) Pub Date : 2023-07-07 DOI: 10.55299/jostec.v5i1.337

H. Prayitno, Dimas Endrawan Putra, M. K. Anam, Wisnu Kuncoro, M. Nur, Cahyo Hidayat

{"title":"Effect of Cessna 172S Aircraft Engine Vibration on the ground on Aviator Academy Pilots","authors":"H. Prayitno, Dimas Endrawan Putra, M. K. Anam, Wisnu Kuncoro, M. Nur, Cahyo Hidayat","doi":"10.55299/jostec.v5i1.337","DOIUrl":"https://doi.org/10.55299/jostec.v5i1.337","url":null,"abstract":"\u0000 \u0000 \u0000 \u0000There are various problems experienced by cadets at the Indonesian Aviator Academy (API) Banyuwangi, one of which is the effect of engine vibrations on the pilot of the cessna 172s aircraft. Vibration is a physical factor in the workplace that comes from the work equipment used. The impact of vibration on humans mainly occurs in certain parts of organs such as: chest, head, jaw, nerves and other joints. In general, exposure to mechanical vibrations in the body can cause disturbances in comfort at work, accelerate the occurrence of work fatigue and the emergence of disturbances to occupational health. The discomfort that affects the cadets at the Indonesian Aviator Academy (API) Banyuwangi affects the causes of fatigue that can cause plane crashes. This study aims to determine the effect of engine vibration on the performance of the pilot of the cessna 172s aircraft. The results of this study were based on questionnaire data obtained from cadets, 50% of 25 respondents answered that they had felt numbness in the hands when holding the steering lever of the aircraft and felt anxious when there was excessive vibration. The condition experienced can be a safety risk for pilots and cadets if the existing problem is not quickly given a solution to the solution. \u0000 \u0000 \u0000 \u0000","PeriodicalId":260226,"journal":{"name":"Journal of Science Technology (JoSTec)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114300041","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

Setup Reduction Integration Model and Lot Size Determination in Export Coffee Processing Production Systems 出口咖啡加工生产系统的建立减少集成模型与批量确定

Journal of Science Technology (JoSTec) Pub Date : 2022-12-30 DOI: 10.55299/jostec.v4i1.236

Sahat Dapottua Sitompul

{"title":"Setup Reduction Integration Model and Lot Size Determination in Export Coffee Processing Production Systems","authors":"Sahat Dapottua Sitompul","doi":"10.55299/jostec.v4i1.236","DOIUrl":"https://doi.org/10.55299/jostec.v4i1.236","url":null,"abstract":"In the last 10 years, competition between companies (business entities) has become increasingly sharp. The company continuously strives to reduce production costs and improve the quality of its products. The development of cooperation with suppliers is one of the efforts made by many companies to achieve this goal. Currently no single company can manufacture its products without the involvement of suppliers. Collaboration in determining policies for supplying and manufacturing companies in terms of supply creates a production system network ( PSN) that has a collaborative relationship pattern . This relationship creates an innovation in the manufacturing system which certainly brings benefits to both parties. Silver, Pyke and Peterson (1998) suggested the need for coordination in determining inventory policies between suppliers and manufacturers, with the aim of being able to make savings on the aspects of setup costs per unit, ordering costs per unit and transportation costs per unit. Determination of inventory policy as a result of cooperation between suppliers and manufacturers creates the need to determine the combined lot size. The research objective is to obtain a combined lot size determination model that takes into account the aspects of reducing setup and improving production quality. The results of demand forecasting in the future are the basis for calculations in production planning, inventory control and calculating the cost of procuring the most economical raw materials.","PeriodicalId":260226,"journal":{"name":"Journal of Science Technology (JoSTec)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652199","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

Application of the Fuzzy Logic Method in Determining the Volume of Water Discharge to the Number of Humans Based on a Microcontroller 模糊逻辑法在微控制器定水量的应用

Journal of Science Technology (JoSTec) Pub Date : 2022-12-26 DOI: 10.55299/jostec.v4i1.260

Muhammad Furqon Siregar, Chairul Imam

引用次数: 0

Engineering Management Analysis at Signalless Intersection 3, Tukad Yeh Aya Street–Pemuda Street Use PKJI 2014 无信号交叉口3号线工程管理分析，杜卡德耶亚街-佩姆达街使用PKJI 2014

Journal of Science Technology (JoSTec) Pub Date : 2022-12-17 DOI: 10.55299/jostec.v4i1.228

Putu Ariawan, Putu Budiarnaya, I GNN Wismantara, I Made Mangku Rangin Wijaya

{"title":"Engineering Management Analysis at Signalless Intersection 3, Tukad Yeh Aya Street–Pemuda Street Use PKJI 2014","authors":"Putu Ariawan, Putu Budiarnaya, I GNN Wismantara, I Made Mangku Rangin Wijaya","doi":"10.55299/jostec.v4i1.228","DOIUrl":"https://doi.org/10.55299/jostec.v4i1.228","url":null,"abstract":"Dense traffic on the roadway often causes traffic bottlenecks, particularly at intersections, such as the unsignalized junction of Tukad Yeh Aya Street and Pemuda Street. The study goals are three analyses: existing performance analysis, alternative selection, and forecast analysis. The study of the performance of the Tukad Yeh Aya Street – Pemuda Street junction in the current situation yields a value of C, which is represented by the duration of intersection delay, which is 24.53 seconds / cur. This result is 1,09 more than PKJI, 2014 limit of 0.85. As a result, various options must be implemented or planned in order to decrease the value of the degree of saturation to a specified limit. To enhance the performance of the Tukad Yeh Aya Street – Pemuda Street junction, two options were based on the current circumstances, designing a one-way and adding APILL lights for four stages led by 2014 PKJI. After calculating, the alternative finds that the one-way road planning alternative has an intersection delay of 10.06 second / cur or the service level is good with a value of B. Therefore, the one-way road planning alternative is chosen as the one that will be used in planning the next five years.","PeriodicalId":260226,"journal":{"name":"Journal of Science Technology (JoSTec)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127035603","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

KNN and XGBoost Algorithms for Lung Cancer Prediction 肺癌预测的KNN和XGBoost算法

Journal of Science Technology (JoSTec) Pub Date : 2022-12-17 DOI: 10.55299/jostec.v4i1.251

M. Rhifky Wayahdi, Fahmi Ruziq

引用次数: 0

Web-Based Academic Information System Design Plan for Kindergarten 基于web的幼儿园学术信息系统设计方案

Journal of Science Technology (JoSTec) Pub Date : 2022-12-10 DOI: 10.55299/jostec.v4i1.183

Fithrie Soufitri, Fani Syahrina Lubis, Aulia Rahmah Lubis

引用次数: 0

Planning of Optimal Raw Materials Inventory Using the Marcov Chain Method 基于马尔可夫链方法的最优原材料库存规划

Journal of Science Technology (JoSTec) Pub Date : 2022-12-10 DOI: 10.55299/jostec.v4i1.157

Rina Handayani, Manaek Hamonangan Sihombing

{"title":"Planning of Optimal Raw Materials Inventory Using the Marcov Chain Method","authors":"Rina Handayani, Manaek Hamonangan Sihombing","doi":"10.55299/jostec.v4i1.157","DOIUrl":"https://doi.org/10.55299/jostec.v4i1.157","url":null,"abstract":"Inventory is an important issue to control. Both finished goods and raw material inventories are the same with ingredient raw for the production process . no seldom our find problem where company no To do good control _ in management inventory that results in needs customer no fulfilled . Ray Traso Jaya is company that manufactures and sells paving block products , bataco , riol concrete and pits wind where in the production process experience disturbance in carry out the production process caused level management supply ingredient raw sand and cement that are not optimal as a result company difficulty for Fulfill needs customers who are fluctuating . Formulas problem in study this is \" How \" determine supply ingredient raw materials and costs supply ingredient optimal raw material at Sinar Traso Jaya?”. Study this aim for determine supply ingredient optimal raw material and cost supply ingredient optimal raw . Method analysis used _ in research this is method Analysis Calculation With Markov Chain. Where is the result study this company can adapt costs required at the time level booking with ingredient fluctuating standard _ with notice stock ingredient available raw . _ That is if ingredient raw sand initial 0 or stock empty on level ordering 170.638 kg the optimal cost is at Rp. 1300,000 , if ingredient cement raw 0 or stock empty on level booking as much as 57,617 kg with the optimal cost is IDR 1,300,000.","PeriodicalId":260226,"journal":{"name":"Journal of Science Technology (JoSTec)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126762761","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 the Selection of the Submersible Pump Specification System of PDAM Tirtauli in Siantar Selatan District, Pematangsiantar City 佩马唐仙塔市仙塔西拉坦区PDAM tittauli潜水泵规格体系选择评价

Journal of Science Technology (JoSTec) Pub Date : 2021-12-30 DOI: 10.55299/jostec.v3i1.203

Yulianti

引用次数: 0