EPI International Journal of Engineering最新文献_第3页

Development of A Presence System for Students Using QR Code Based on Android Application 基于Android应用的学生二维码考勤系统的开发

EPI International Journal of Engineering Pub Date : 2022-08-31 DOI: 10.25042/epi-ije.082022.07

Mar'atuttahirah Mar'atuttahirah, Mardhiyyah Rafrin, Mahdaniar Mahdaniar, P. Maharani

{"title":"Development of A Presence System for Students Using QR Code Based on Android Application","authors":"Mar'atuttahirah Mar'atuttahirah, Mardhiyyah Rafrin, Mahdaniar Mahdaniar, P. Maharani","doi":"10.25042/epi-ije.082022.07","DOIUrl":"https://doi.org/10.25042/epi-ije.082022.07","url":null,"abstract":"The Department of Information System at Institut Teknologi B.J. Habibie still physically records each student's attendance by having them sign a presence sheet for each course. Due to the ease with which fraudulent signatures can be used to manipulate the traditional system, there may be some issues. Additionally, manual presence recapitulation takes more time and could be less precise and effective. This research aims to develop a prototype of Android-based application of student presence system with QR Code technology in the Department of Information System, Institut Teknologi B.J. Habibie. Following the creation of the presence system prototype, ISO 25010 quality standards were used to evaluate the application. The criteria evaluated are functionality, usability, portability, performance efficiency, and security. The application’s functionality was tested by two system experts by using Guttman Scale and it gained 100% yes answer. The usability was tasted from 30 users rating the application usability through a survey using Likert Scale, it achieved the average percentage of positive answers is 91%. The performance efficiency was classified as grade A by GTmetrix testing site. Similarly, the security system tested by sslabs.com achieved grade A. Furthermore, the portability was tested by using 4 different web browsers for the web version and by installing the application on 4 different smartphones and they showed no errors. Based on the overall assessment result, the Android-based Student Presence System is feasible, efficient, suitable and secure.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133553043","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

Modeling and Simulation of a Double-Stage Single-Phase Grid-Connected PV System 双级单相光伏并网系统的建模与仿真

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.03

Channareth Srun, P. Chrin, Sokchea Am, Bunthern Kim

引用次数: 1

Semiotic Perspective of Characteristics and Meanings of Hunto Sultan Amai Mosque Ornaments in Gorontalo 从语义学角度看戈伦塔洛 Hunto Sultan Amai 清真寺装饰的特点和含义

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.09

Asmin Salongi, A. Harisah, R. Wikantari

{"title":"Semiotic Perspective of Characteristics and Meanings of Hunto Sultan Amai Mosque Ornaments in Gorontalo","authors":"Asmin Salongi, A. Harisah, R. Wikantari","doi":"10.25042/epi-ije.022022.09","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.09","url":null,"abstract":"A mosque is a well-known form of architecture in the Islamic community, serving as a center for religious activities and a symbol of Islamic identity. The Hunto Mosque in Gorontalo City, Hohuntonga, which means a gathering place, is known for its beautiful architectural design which owes much to the role of the ornaments adorning the building. This research aims to describe and interpret the characteristics and meanings of the ornaments in the Hunto Sultan Amai Mosque, as well as identify the factors that shape their characteristics. A qualitative method with Roland Barthes' (1986) semiotic approach was employed, and data was gathered through observation, interviews, and documentation. The results reveal that the ornamentation in the mosque consists of geometric and floral shapes, with square patterns and lotus flower motifs, colored in white and gold and made of paint. The most prominent placement of these ornaments is on the mosque wall elements. The square shape has meaning “symbol of physical experience and the physical world of materiality”, while the lotus flower represents adaptation and idealism. White signifies purity, while gold symbolizes triumph and power. The characteristics and meanings of the ornaments are formed from Arab and Malay architecture.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128109453","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 Sensation Analysis in the Building of Universitas Ichsan Gorontalo 高伦塔洛大学建筑热感觉分析

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.10

Siti Khairunnisa Abay, B. Hamzah, R. Mulyadi

{"title":"Thermal Sensation Analysis in the Building of Universitas Ichsan Gorontalo","authors":"Siti Khairunnisa Abay, B. Hamzah, R. Mulyadi","doi":"10.25042/epi-ije.022022.10","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.10","url":null,"abstract":"Gorontalo City is characterized by a tropical climate, where thermal comfort is a crucial component to achieve, particularly for educational activities aimed at students. The thermal comfort is affected by various factors, namely building design, internal, and external factors. The university building represents a facility where face-to-face learning and teaching activities occur. The purpose of the current study is to analyze the perceived thermal comfort of students during classroom activities with three different air conditioning (AC) settings (16, 22, and 27 oC) in theUniversitas Ichsan Gorontalo campus building. This research employed a quantitative descriptive method, comprising thermal measurements inside the classroom and questionnaire distribution to students to collect thermal sensation data. The research object was conducted in three separate classrooms during the time range of 08.00-15.00 Central Indonesia time. The results revealed that most students felt neutral and comfortable in the three different AC settings inside the classroom. Nevertheless, it should be noted that thermal comfort could be influenced by other factors, such as physical activity and clothing. Consequently, further research could be conducted by taking into consideration these factors and engaging the participation of teachers and staff to acquire a more comprehensive understanding of thermal comfort in the campus building.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133806867","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

Classification Freshness of Red Snapper (Lutjanus Campechanus) Based on Eye Image Using Convolutional Neural Network 基于人眼图像的红鲷鱼新鲜度分类卷积神经网络

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.08

Muh. Subhan, Nursakinah Nursakinah

{"title":"Classification Freshness of Red Snapper (Lutjanus Campechanus) Based on Eye Image Using Convolutional Neural Network","authors":"Muh. Subhan, Nursakinah Nursakinah","doi":"10.25042/epi-ije.022022.08","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.08","url":null,"abstract":"Indonesia is a maritime country where fish is the most widely extracted and consumed marine natural resource, one of which is snapper. Snapper contains high protein. Therefore, it is suitable for health. Red snapper or Lutjanus campechanus is one economical fish with a broad market share. Red snapper is a demersal fish group that ranks third with the most exported commodities after tuna and shrimp. In addition, snapper is one of the most common consumption fish in Indonesia. Therefore, the community needs to be able to identify the freshness of the fish. Fish freshness detection is done manually by touching the fish's body, eyes, and gills. However, this can cause accidental damage to the fish parts, which will be very detrimental. Several studies on identifying fish freshness explain that the VGGNet-16 Architecture on the Convolutional Neural Network algorithm is superior in its modeling performance. This research uses a different fish object, a red snapper object, with two different architectures from several previous studies, namely the Le-Net15 and VGGNet-16 architecture. This research focuses on the eye image carried out through the pre-processing data stage by cutting the fish body, followed by augmentation to reproduce the image data without losing its essence before training the dataset. The model will be trained using the Adam optimization method with very fresh and not fresh predictions. The experimental results of the classification of two classes of red snapper freshness using 600 fish images show that VGGNet-16 achieves the best performance compared to the LeNet-5 architecture, where the classification accuracy reaches 98.40%.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121164141","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

Performance of TEC Cascade on Input Voltage Variations in Fish Cooler Box 鱼冷箱输入电压变化时TEC级联的性能

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.07

Z. Djafar, Sabiqunnas Sabiqun, W. H. Piarah

引用次数: 0

Natural Frequencies of Isotropic Rectangular Plates in Improved Accuracy 提高精度的各向同性矩形板的固有频率

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.05

Y. Narita

引用次数: 0

Clustering Mining Equipment Productivity Data Using K-Means Algorihtm 基于k -均值算法的采矿设备生产率数据聚类研究

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.04

Muh Sandi Arista Ikhsan Yahmid, Tony Chen, Muhammad Emirat Millenium Try, Karno Nugroho Silangin, Nurul Alifia Putri, A. V. Anas

{"title":"Clustering Mining Equipment Productivity Data Using K-Means Algorihtm","authors":"Muh Sandi Arista Ikhsan Yahmid, Tony Chen, Muhammad Emirat Millenium Try, Karno Nugroho Silangin, Nurul Alifia Putri, A. V. Anas","doi":"10.25042/epi-ije.022022.04","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.04","url":null,"abstract":"There are many factors that affect the productivity of mining equipment, one of which is the condition of the mining equipment when it is used. Knowing the condition of the machines on mining equipment is mandatory for supervisors in mining activities. In analyzing data on the condition of mining equipment in large quantities requires a lot of energy and time, so a classification model is needed that can categorize the mining equipment based on its performance. Data Mining is a process that uses statistical, mathematical, artificial intelligence and machine learning techniques to extract information. The results of data mining for mining productivity data are obtained duration of mining equipment work has a impact on productivity based on correlation value between work duration and maintenance duration of a tool. Data mining analysis is also carried out by clustering mining equipment using the K-Means model. The results obtained a conclusion that supports mining equipment with less working duration affects to productivity. The result shows variables that affect the productivity of mining equipment and divide mining equipment categories based on tool performance with data mining clustering techniques.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125734284","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

Strength Analysis Due to the Elongation’s Ladder of Cutter Suction Dredger Ship 绞吸挖泥船加长梯架的强度分析

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.01

Hariyono Hariyono, G. Sitepu, M. Alie

{"title":"Strength Analysis Due to the Elongation’s Ladder of Cutter Suction Dredger Ship","authors":"Hariyono Hariyono, G. Sitepu, M. Alie","doi":"10.25042/epi-ije.022022.01","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.01","url":null,"abstract":"The more frequent mining activities are carried out, the deeper the tin on the seabed, therefore many ship owners want to increase the length of the ladder on production suction vessels. The owner of the KIP Timah 8 suction boat will increase the length of the ladder to 70 meters, which previously was only 58 meters. The paper research are the response of the ladder structure before and after being extended, the limit strength of the ladder structure in the pulley area, then the ultimate strength of the longitudinal ladder structure due to the vertical bending moment. Lenght of the ladder construction subsequently increases commencing 58 m, 62 m, 66 m, to 70 m with each increase in length varying the slope angle of the ladder starting from 0o, 30o, 45o, to 60o. This paper uses a numerical method with the help of ansys software. The structure being reviewed is only in the ship ladder area. The response of the ladder structure before and after being extended, the maximum stress value occurs in the strut construction which is 49 meters from the ladder shaft, which is 56.88 N/mm2 and the maximum shift is 14.28 mm when the ladder length is 70 meters and still meets the allowable stress. Investigation of the limit strength using the Nonlinear Finite Element Analysis (NLFEA) method. Based on the results the analysis of the strength longitudinal ladder structure in the hogging and sagging conditions 42 meters from the ladder shaft, the maximum deflection in the column is 131.73 mm from the initial position before being loaded. While at an angle of 60 degrees it will collapse when deflection 66.17 mm. The results of the analysis showed that the load acting on the ladder the pipe load, cutter load and cutter torque the resulting stress still meets the stress that the longer ladder is directly proportional to the resulting stress and deflection value and the greater the slope of the ladder, the smaller stress and deflection.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128165620","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

Numerical and Experimental Analyses of Track Shoe Patterns for Vehicle on Sandy Terrain 沙质地形上车辆履带鞋型的数值与实验分析

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.02

I. P. Nurprasetio, Wirya Wicaksana, S. Zulaikah, B. Budiman

{"title":"Numerical and Experimental Analyses of Track Shoe Patterns for Vehicle on Sandy Terrain","authors":"I. P. Nurprasetio, Wirya Wicaksana, S. Zulaikah, B. Budiman","doi":"10.25042/epi-ije.022022.02","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.02","url":null,"abstract":"A track is a vehicle propulsion system that consists of a continuous band of chains connected with track shoes or may be entirely made of rubber. The track system is still commonly used on various vehicles, including bulldozers, excavators, tanks, and tractors, and has recently been used in lunar expedition vehicles. A tracked vehicle is mainly designed to provide better mobility in rough, uneven, or slippery terrain. The main component of the track system is track shoes or so-called grousers. This track shoe geometry will determine the tractive performance of the vehicle. If an incorrect shape is used, the excavator will most likely slip. The previous study approached this traction problem by using the semi-empirical method. However, until now, the track geometry and traction relation are still unclear. This research focuses on the effects of track shoe geometry on tractive performance and vehicle climbing ability. The analysis was mainly conducted with a DEM (Discrete Element Method) simulation. The result from the experimental test is also confirmed using a small-scale RC prototype on simulated terrain with different slope variations. It is proven that the grouser height directly affects the climbing performance of tracked vehicles. A higher grouser height proves to be better at a higher inclination slope. However, for a low inclination angle, the flattened track was better. The traction result from the EDEM simulation also yields a similar result. However, higher usable traction means more friction is generated; therefore, the track with higher traction also takes more energy to cover the same distance.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117222576","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