Semesta Teknika最新文献

Classification of Brain Image Tumor using EfficientNet B1-B2 Deep Learning 利用 EfficientNet B1-B2 深度学习进行脑图像肿瘤分类

Semesta Teknika Pub Date : 2024-05-02 DOI: 10.18196/st.v27i1.19691

Widi Hastomo, Adhitio Satyo Bayangkari Karno, Ellya Sestri, Vany Terisia, Diana Yusuf, Shevty Arbekti Arman, Dodi Arif

{"title":"Classification of Brain Image Tumor using EfficientNet B1-B2 Deep Learning","authors":"Widi Hastomo, Adhitio Satyo Bayangkari Karno, Ellya Sestri, Vany Terisia, Diana Yusuf, Shevty Arbekti Arman, Dodi Arif","doi":"10.18196/st.v27i1.19691","DOIUrl":"https://doi.org/10.18196/st.v27i1.19691","url":null,"abstract":"In this study, a new neural network model (EfficientNet B1-B2) was sought for the detection of brain tumors in magnetic resonance imaging (MRI) images. The primary objective was to achieve high accuracy rates so as to classify the images. The deep learning techniques meticulously processed and increased the data augmentation as much as possible for the EfficientNet B1-B2 models. Our experimental results show an accuracy of 98% in the B1 version in Table II. This provides a potentially optimistic view of the application of artificial intelligence technology to disease diagnosis based on medical image analysis. Nonetheless, we must remind ourselves that the dataset we used has limitations in terms of the challenges it can pose. Although the number of potential variations of actual medical images constitutes a major challenge, it is not the only one. Most medical datasets are unbalanced, contain highly variable noise, have a slow internal structure, and are often small in size. Hence, our end goal is to help stimulate not only the field of brain tumor detection and treatment but also the development of more sophisticated classification models in the health context.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"3 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019188","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

Thermal Stratification Characteristics of Storage Tanks on Solar Water Heater Inserted with Latent Heat Material 插入潜热材料的太阳能热水器储水箱的热分层特性

Semesta Teknika Pub Date : 2024-05-02 DOI: 10.18196/st.v27i1.21753

Muhammad Nadjib, Wahyudi Wahyudi, Tito Hadji Agung Santosa, Yaafi Hidayat

引用次数: 0

Structure Design Evaluation of Muhammadiyah Banjarmasin University Convention Centre Building Due to Functional Change Based on SNI 03-2847-2019 基于 SNI 03-2847-2019 的功能变化对 Muhammadiyah Banjarmasin 大学会议中心大楼的结构设计评估

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.18659

Elia Anggarini, Irwandy Muzaidi

{"title":"Structure Design Evaluation of Muhammadiyah Banjarmasin University Convention Centre Building Due to Functional Change Based on SNI 03-2847-2019","authors":"Elia Anggarini, Irwandy Muzaidi","doi":"10.18196/st.v26i2.18659","DOIUrl":"https://doi.org/10.18196/st.v26i2.18659","url":null,"abstract":"The Muhammadiyah Banjarmasin University Convention Centre Building was originally built as a guesthouse, over time it changed its function to become a place for lecture activities. Therefore, an evaluation of the initial structural design is carried out on the reliability of the building structure as regulated in Government Regulations in Permen PU No. 25 of 2007 concerning Certificate of Building Functioning or SLF. The data used in this study are primary and secondary data, where primary data is in the form of field tests to determine the uniformity of concrete quality, namely the bounce test using the Hammer Test tool on the beams and columns of the 1st floor and 2nd floor as many as 10 points, while secondary data uses preliminary planning data. Modeling is done in 3D using SAP2000 software. The results of research on the value of uniformity of concrete quality show mixed results, this is due to several factors, one of which is different casting methods in the field. Meanwhile, from the results of the analysis of the service ability of the building structure, the value of the Ultimate Moment (Mu) and Ultimate Load (Pu) as well as the Maximum Ultimate Moment (Mr) and Maximum Ultimate Load (Pr) is still able to withstand the loads acting on the structure even though it has changed its function based on SNI 03-2847-2019.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"43 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237604","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 Conceptual Design of An Electro-Magnetic Power Generator 电磁发电机的概念设计

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.19404

Faiq Taquiddin Azahari, Maxmillain Newman Anak Atel, Siti Salwa Samsuri, Azunaidi Abdul Aziz

{"title":"The Conceptual Design of An Electro-Magnetic Power Generator","authors":"Faiq Taquiddin Azahari, Maxmillain Newman Anak Atel, Siti Salwa Samsuri, Azunaidi Abdul Aziz","doi":"10.18196/st.v26i2.19404","DOIUrl":"https://doi.org/10.18196/st.v26i2.19404","url":null,"abstract":"Nowadays, magnetic field induction is a dependable renewable energy source that can convert magnetic fields into electrical power. In this study, our objective is to propose a low-cost free energy generator design based on neodymium. The main problems with existing generators were air pollution, noise pollution, and even fuel price volatility. To begin addressing this issue, we compared 6 currently used generators. We concentrated on 5 criteria in light of this outcome. Our top considerations in this study are cost and maintenance. Then comes the size, weight, and noise. The best electromagnetic power generators for satisfying all the criterion domains are determined using Pugh's matrix. It demonstrates that electromagnetic power generators have a high score of 95 compared to natural gas, portable, and diesel power generators. We have also calculated the resulting voltage from the selected number of permanent magnet coils. This calculation shows 60V resulting in 9600 turns. As a result, we draw the conclusion that the reduction of problems like noise and air pollution makes this power generator look like a very appealing alternative.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"9 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237523","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

Experimental Study on the Performance of Mechanical Coupler Splice Made of Rebar Under Monotonic Loading 单调荷载下钢筋机械耦合器接头性能的实验研究

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.19263

Heidi Muhammad, Ashar Saputra, Andreas Triwiyono

引用次数: 0

Thermal Resistance of the Loop Heat Pipe Prototype in Steady State Conditions 稳态条件下环形热管原型的热阻

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.18788

D. Haryanto, Sumantri Giarno, Yoyok Hatmoko, Dwi Setyo, M. Pambudi, Hadi Kusuma

{"title":"Thermal Resistance of the Loop Heat Pipe Prototype in Steady State Conditions","authors":"D. Haryanto, Sumantri Giarno, Yoyok Hatmoko, Dwi Setyo, M. Pambudi, Hadi Kusuma","doi":"10.18196/st.v26i2.18788","DOIUrl":"https://doi.org/10.18196/st.v26i2.18788","url":null,"abstract":"The nuclear accident at the Fukushima Daiichi nuclear power plant in March 2011 in Japan caused a tsunami and submerged the emergency diesel generator resulting in a station blackout (SBO). Based on the accident, a study was conducted on the use of passive safety systems as a support for active safety systems in nuclear reactor cooling systems. The Loop Heat Pipe (LHP) prototype is a small-scale LHP research facility, one of which is used to determine the characteristics and heat transfer events in LHP. Calculations to determine the thermal resistance of the LHP prototype need to be carried out to determine its performance level. The research was carried out experimentally for data collection followed by calculations based on the data that had been obtained. The calculation results obtained that the lowest thermal resistance is 0.014 °C/w with a 100% filling ratio and an airflow velocity of 2.5 m/s, so the setting of filling ratio and airflow velocity produces the best LHP prototype performance. The higher the airspeed, the greater the heat released by the condenser resulting in the value of the thermal resistance of the LHP prototype getting smaller. Thus, the greater the airspeed, the lower the thermal resistance of the LHP prototype, this indicates that the performance of the LHP prototype is increasing.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139236768","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

Web-Based System Information Certificate Services at Klamono District Offices 克拉莫诺地区办事处的网络系统信息证书服务

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.19573

Muhammad Nur Arief, Muhammad Rizki Setyawan, Rendra Soekarta, Pascalina Magrice Simori

引用次数: 0

Study the Applicability of a Shelf-Type Fish Drying Machine with a Heat Source from Coconut Shell Biomass 研究利用椰壳生物质热源的架式鱼类干燥机的适用性

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.17077

Agus Sulistiyo Budi, Mohammad Samsul Bakhri, Yuli Nurasri, Aghna Ilma Nurdin Suripto, Sultan Krisna Amir, Rojikin Rojikin

引用次数: 0

Analysis of the Noise Level at the Muhammadiyah KH. Ahmad Dahlan S. Parman Complex, Banjarmasin 班加罗尔马辛 Muhammadiyah KH.Parman Complex, Banjarmasin

Semesta Teknika Pub Date : 2023-11-25 DOI: 10.18196/st.v26i2.18664

Dyah Pradhitya Hardiani, Emma Ruhaidani

引用次数: 0

Correlation between Physical Properties and Specific Fuel Consumption in Jatropha -Used Cooking Oil Biodiesel Mixtures 麻疯树-废食用油生物柴油混合物的物理特性与特定燃料消耗量之间的相关性

Semesta Teknika Pub Date : 2023-11-24 DOI: 10.18196/st.v26i2.20163

Wahyudi Wahyudi, Muhammad Nadjib, Apriyanto Apriyanto

{"title":"Correlation between Physical Properties and Specific Fuel Consumption in Jatropha -Used Cooking Oil Biodiesel Mixtures","authors":"Wahyudi Wahyudi, Muhammad Nadjib, Apriyanto Apriyanto","doi":"10.18196/st.v26i2.20163","DOIUrl":"https://doi.org/10.18196/st.v26i2.20163","url":null,"abstract":"This study was motivated by the need to understand the influence of using waste jatropha biodiesel on the physical properties of fuel and the performance of diesel engines. The primary aim was to determine the relationship between the fuel's physical properties, spray angle, and specific fuel consumption (SFC) at various load levels. The methodology employed included measurements of density, viscosity, flash point, calorific value, spray angle, and SFC for different blends of waste jatropha biodiesel and diesel (B5, B10, B15, B20). The research results demonstrate an increase in density, kinematic viscosity, and flash point, along with a decrease in calorific value, as the biodiesel content increases. The density of the biodiesel mixture ranges from 823 kg/m³ at B5 to 836.50 kg/m³ at B20. The kinematic viscosity increases from 3.9 cSt at B5 to 5.2 cSt at B20, and the flash point rises from 112.9°C at B5 to 128.7°C for B20. Meanwhile, the calorific value decreases from 10308.2670 cal/g at B5 to 10133.8280 cal/g for B20. A strong correlation exists between density and kinematic viscosity with the spray angle, exhibiting R2 values of 0.9141 and 0.8287, respectively. The correlation between the fuel's physical properties and the specific fuel consumption (SFC) is also substantial, marked by high R2 values above 0.93. These findings provide a solid foundation for the development of more optimal biodiesel formulations.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"117 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139239228","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