PIKSEL : Penelitian Ilmu Komputer Sistem Embedded and Logic https://jurnal.unismabekasi.ac.id/index.php/piksel <p align="justify">PIKSEL : Penelitian Ilmu Komputer Sistem Embedded and Logic is a journal published by Research and Community Service Center (LPPM) of Universitas Islam 45 Bekasi. This journal was originally intended to accommodate scientific papers from computer science and informatics research. This journal was published for the first time in 2013 with two numbers annually and available online since 2018. PIKSEL status is accredited by the directorate general of research strengthening and development no. 28/E/KPT/2019 with Indonesian Scientific Index (SINTA) journal-level of S5, starting from volume 6 (1) 2018 to volume 10 (1) 2022. <strong>PIKSEL status is accredited by the directorate general of research strengthening and development no. 225/E/KPT/2022 with Indonesian Scientific Index (SINTA) journal-level of S3, starting from volume 10 (1) 2022 to volume 14 (2) 2026.</strong> The topics in the PIKSEL journal are computer science, embedded system, software engineering, information system, computer network, digital image processing, artificial and computational intelligence, and machine learning. <a href="http://u.lipi.go.id/1365131025" target="_blank" rel="noopener">p-ISSN: 2303-3304</a>, <a href="http://u.lipi.go.id/1522047540" target="_blank" rel="noopener">e-ISSN: 2620-3553.</a></p> <p align="justify"><a title="SK Accredited Piksel Sinta 3" href="https://arjuna.kemdikbud.go.id/files/info/Hasil_Akreditasi_Jurnal_Ilmiah_Periode_III_Tahun_20226.pdf" target="_blank" rel="noopener">SK Accredited</a>&nbsp; |&nbsp;&nbsp;<a title="SK Accredited Piksel Sinta 3" href="https://arjuna.kemdikbud.go.id/files/info/Hasil_Akreditasi_Jurnal_Ilmiah_Periode_III_Tahun_20226.pdf" target="_blank" rel="noopener"></a><a href="https://drive.google.com/file/d/1vxDvQQ9A5Vo-puqvg3PoBImdPY6SVhW7/view">Certivicate Accredited Sinta 3</a></p> LPPM Universitas Islam 45 Bekasi en-US PIKSEL : Penelitian Ilmu Komputer Sistem Embedded and Logic 2303-3304 Web-Based E-Log Book Application for Enhancing the Quality of Student Projects https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8094 <p><em>The student project is the biggest specter for students, and many are hindered by it.&nbsp;</em><em>The problem that occurs is the difficulty of student activities and assignment supervisors who are still carried out manually, so it cannot be denied that there are many carelessness and errors that have an impact on the final result. The purpose of this research is to design and build a website-based final project guidance e-log book application using the prototyping method in Informatics Engineering S1 Faculty of Computer Science, Dian Nuswantoro University Semarang. The research method applies a qualitative approach with the source of interviews and document studies, while the development method uses the prototype method with three steps namely listening to customers, building and revising mock-ups, and testing. The results showed that the website for recording final project guidance in Informatics Engineering S1, Faculty of Computer Science, Dian Nuswantoro University Semarang that had been developed was in accordance with the needs of the Final Project Coordinator for monitoring students in recording final project guidance. The application of the prototype method that starts from listening to customers, building and revising mock-up, and testing is very helpful in the process of developing a website for recording final project guidance.</em></p> <p><em>&nbsp;</em></p> Devanda Radya Ananta Defri Kurniawan ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 1 10 10.33558/piksel.v12i1.8094 The Enhancing User Experience for Mother and Children Services at Sungai Duren Health Center in Muara Enim, Indonesia https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8131 <p>In the present digital age, it is imperative for us to harness the advancements in technology, particularly in the healthcare sector. The initial step in a medical consultation involves health screening. Traditional health screening relies on interviews and paper documentation. However, over time, the use of paper can lead to data accumulation and potential loss. This research focuses on the creation of a user-friendly mobile application for Mother and Child Health Services, utilizing the Design Sprint method. The Sungai Duren Health Center in Muara Enim Regency, Indonesia, currently lacks essential technology for disseminating information about Mother and Children Health Services. Implementing supporting technology is crucial for enhancing service quality for health center participants. The anticipated benefits extend to academia, writers, and the users of the application.</p> Rasmila Rasmila Muhammad Fharid Akbar ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 11 22 10.33558/piksel.v12i1.8131 Improving Network Performance of Headquarters and Branches Using Software-Defined Network WAN (SD-WAN) https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8115 <p><em>The world of information technology is currently developing very quickly, so many private companies are trying to expand their business, especially in the field of information technology. Small to medium companies also need a stable and safe internet network so that the company can grow. Companies that have branch offices in geographically separated locations must use a Wide Area Network (WAN) to be connected. SD-WAN is a special software from Software-Defined Network (SDN) technology, which is used on WAN (wide area network) connections. This research aims to provide solutions to small and medium companies to increase the SLA (Zero Downtime) of their connectivity. Currently, by implementing SD-WAN to improve the performance of head office and branch networks with a low budget. Using the PPDIOO method which is Cisco's life cycle network design approach to support computer network development. The PPDIOO method is an abbreviation of the research design used, namely Prepare, Plan, Design, Implement, Operate and Optimize. After implementing SD-WAN, this becomes a solution that can replace the function of the Juniper router currently used and reduce the burden of internet subscription costs due to its implementation. This SD-WAN simply uses 1 internet link and 1 MPLS link. </em></p> Muchlisin Muchlisin Boy Yuliadi ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 23 34 10.33558/piksel.v12i1.8115 Voice Command-Based IoT on Smart Home Using NodeMCU ESP8266 Microcontroller https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8287 <p><em>This research focuses on developing a Smart Home prototype that integrates the Internet of Things (IoT) and voice command using the NodeMCU ESP8266 microcontroller. This system allows users to control household devices such as lights, gates, and fans with voice commands through voice-enabled devices. The prototype utilizes NodeMCU ESP8266 to connect the devices to a WiFi network. The developed voice recognition system can accurately identify voice commands and send instructions to NodeMCU ESP8266 to control the corresponding devices. The test results demonstrate the prototype's efficiency in automating household devices through voice commands. Consequently, users can enhance comfort and energy efficiency within their homes. This research opens opportunities for the development of smarter and user-friendly Smart Home systems in the future.</em> <em>Response testing of the Blynk application showed a 100% success rate, with an average response time of less than ten seconds. WiFi network testing was carried out with the IP Address, resulting in good functional performance even in the presence of physical obstacles, and the device can operate well up to a distance of 22 meters.</em></p> Muhammad Ariel Shakaramiro Aris Gunaryati Ben Rahman ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 35 46 10.33558/piksel.v12i1.8287 Exemplary Teacher Selection Using a VIKOR-Based Decision Support System https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8311 <p>Yadika 13 Tambun Vocational School has criteria where the school does not yet have a system that can support a decision. The decision support system (DSS) for selecting exemplary teachers in appreciating teacher performance presentations that have been made while teaching staff is expected to increase motivation so that they can improve their performance. Many DSS methods are used to find a decision in this study. The method to be used is VIseKriterijumska Optimizacija I Kompromisno Resenje, (VIKOR) which can produce the best alternative in the form of ranking of an existing sample by looking at the utility values and weights of each sample. This study describes the design of a decision support system for conducting assessments in selecting exemplary teachers at SMK Yadika 13 Tambun. System design using UML (Unified Modeling Language). The decision support system (DSS) is very helpful for those who will carry out the assessment process, before there was a decision support system the school always found it difficult to assess because it took quite a long time, the assessment was still done manually, it was difficult to calculate the assessment, sometimes there is an error in the assessment results. Therefore, this decision support system, it can help the school minimize these problems.</p> Dwipa Handayani Dani Yusuf Gabriella Putri Larasati Ozzi Ardhiyanto ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 47 58 10.33558/piksel.v12i1.8311 Security Analysis of Learning Management System Using Penetration Testing with ISSAF Framework https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8331 <p><em>The development of Information Technology must be balanced with security in the system in the face of hacking threats that have an impact on information leakage or service disruptions. Without the security of the system, many hackers will easily take over the system. To solve security problems, a method that ensures security is needed. This study uses the Penetration Testing method using the ISSAF frameworks. The results of this research are expected to find out the security gaps in the LMS that are currently used. </em></p> Rusydi Umar Imam Riadi Sonny Abriantoro Wicaksono ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 59 68 10.33558/piksel.v12i1.8331 Integration of Fuzzy AHP and TOPSIS In Decision Support System for Lecturer Academic Promotion https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8305 <p><em>Lecturer academic position or known as functional position is a criterion to measure the quality of higher education lecturers. Functional positions are also a form of performance performance for lecturers to be more measurable. Currently, technology is a tool for universities to measure lecturer performance and monitor applications for lecturer functional position increases to avoid the subjective nature that occurs in many cases. This research proposes to integrate the Fuzzy AHP and TOPSIS methods in providing recommendations to universities regarding the order of lecturers who are eligible to apply for functional promotion. This method assesses the relative importance of each criterion (education, teaching, research, community service, and support) and alternative (worthy and not worthy). The results obtained as many as 8 lecturers were declared worthy of promotion recommendations with lecturer 8 and lecturer 7 being the first and second order recommended for eligibility. </em></p> Rakhmi Khalida khairunnisa Fadhilla Ramdhania ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 69 78 10.33558/piksel.v12i1.8305 Learning Tools for Artificial Intelligence Implementation https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9476 <p>According to the rules of the Indonesian National Qualifications Framework (KKNI), undergraduate students fall into levels 5 and 6. Here, graduates are required to have the ability to apply existing knowledge according to the needs of the job. However, laboratory facilities that provide such competencies are very difficult to provide, especially for private campuses that rely on funding from students. This research tries to anticipate the gap between students' abilities and industry demands by providing laboratory facilities that do not require large costs. One of the courses demanded for students to master is Artificial Intelligence (AI), which has now spread to various fields. However, the curriculum currently applied usually focuses only on methods commonly used in the field of AI, while implementation in corporate fields requires direct application in the form of applications. Research results prove that several online applications can be used as substitutes for laboratories, including Google Colab, Play with Docker, Streamlit, and Teachable Machine. Compared to providing servers, computers containing development applications, using computers or laptops connected to the internet, students can easily implement the AI knowledge they have learned. For group work, applications for Continuous Integration/Continuous Delivery can be utilized, for example with Github, Gitlab, and similar ones.</p> Herlawati Herlawati ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 79 88 10.33558/piksel.v12i1.9476 State Transition Method Analysis for Testing the Interactive Multimedia Applications https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8521 <p>Interactive multimedia applications help users to get interactive information, such as an interactive multimedia application, called ‘I Learn to Read’ (ABACA) which can be used by first-grade elementary school students who can interact easily through the ABACA application to learn reading. Yet, to ensure that the multimedia application is interactive according to user needs and guaranteeing the quality of the application, testing needs to be done. Testing is carried out using black box testing which focuses on application functionality, so this research is more focused on black box testing using the State Transition method which consists of four stages, namely state transition testing design, Test Case, Testing, and conclusions from what has been done in the activity ABACA Interactive Multimedia Application testing. Results showed that twenty-three functionalities have been tested and succeeded in displaying transitions by the existing functionalities.</p> Santi Purwanti Khansa Mufidah Fillah Jaja jaja Nita Delima ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 89 96 10.33558/piksel.v12i1.8521 Developing a Web-Based Application for Palm Seedling Eligibility Using C5.0 Algorithm and CART Algorithm https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8810 <p>Agriculture is an important sector in a country's economy and plays a vital role in providing food and industrial raw materials. The oil palm plantation industry has a huge economic impact. However, a challenge faced by palm oil producers is the selection of optimal seedlings. Poor-quality seedlings can result in reduced productivity, economic losses, and environmental impacts. Therefore, evaluating the feasibility of oil palm seedlings is very important. Proper selection of seedlings can increase plantation productivity and reduce losses caused by failure to plant unsuitable seedlings. This research aims to implement data mining using the C5.0 and CART algorithms in evaluating the feasibility of oil palm seedlings. Tests conducted on the determination of oil palm seedling eligibility resulted in 92% accuracy for the C50 algorithm while the CART algorithm resulted in 89% accuracy from a total of 97 data. Provides a better understanding of the effectiveness of the two algorithms in assisting decision-making related to planting and managing oil palm seedlings.</p> <p>&nbsp;</p> Muhammad Afif Pratama Ginting Sriani Sriani ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 97 108 10.33558/piksel.v12i1.8810 Enhancing IT Employee Placement Using SMARTER with Centroid Rank Order Weighting for Candidate Suitability https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9165 <p>In an era characterized by constant evolution in digital technology, the significance of Information Technology (IT) within organizations is of utmost importance. Efficient recruitment processes and appropriate placement of IT personnel are crucial for a company's success. This research aims to develop a candidate assessment system using the SMARTER (Smart Simple Multi-Attribute Rating Technique Exploiting Rank) approach combined with the Rank Order Centroid weighting method to assist HR departments in selecting suitable IT candidates. Addressing the challenges faced by HR directors lacking IT expertise, this study offers an innovative solution to enhance alignment between candidates and IT position requirements. Through the analysis of nine specific criteria, including education, work experience, and English proficiency, the system is designed to provide more accurate candidate placement recommendations. The findings of this research demonstrate significant potential in improving IT recruitment processes and contributing significantly to the literature.</p> Ben Rahman Saskia Adinda Adelia Putri Handayani ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 109 118 10.33558/piksel.v12i1.9165 Real Time Mask Detection Using Viola Jones Method https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9028 <p>The coronavirus disease (COVID-19) pandemic requires us to wear masks when doing direct contact with other people. The use of masks is mandatory in some places to break the chain of the spread of the COVID-19 virus. The spread of this virus occurs through the respiratory tract. Wearing masks is a form of our efforts to suppress the spread of this virus. This study detects human face objects in a room to determine faces that use masks and faces without using masks. The research was conducted using the Viola Jones Method in the OpenCV-Python library. This paper resulted in a good accuracy of the tests carried out to obtain 95.6% results. This detection agent has been able to perform face recognition with the condition of using a mask and the face without using a mask. On the display screen will show the face recognition accuracy in real time of the detected face object.</p> Safrida Ika Guslianto Khairunnas Khairunnas Tachiyya Nailal Khusna Miftahul Jannah ##submission.copyrightStatement## 2024-03-31 2024-03-31 12 1 119 126 10.33558/piksel.v12i1.9028 Smart Home System for Controlling Household Appliances Utilizing Photovoltaic Technology https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9261 <p><em>Photovoltaic is a technology that functions to convert solar energy into electrical energy directly. The smart home system for controlling household appliances with Photovoltaic technology is a concept that integrates renewable technology and artificial intelligence to increase the efficiency and sustainability of energy use in households. By using the ESP32 microcontroller as the main control system to monitor and regulate power usage based on the availability of solar energy. The system starts by checking the solar voltage, if it is providing enough power to household appliances. If the solar voltage is insufficient the system will turn off non-essential equipment or reduce power consumption. Users can control the system via smartphone to activate household appliances as needed. The system uses an inverter to convert the DC voltage from the solar panels into the AC voltage required by household appliances. This research combines Photovoltaic and IoT technology in a Smart Home that can increase energy efficiency and support environmental conservation efforts. Research can make a positive contribution to the development of sustainable energy solutions for modern households. </em></p> Mohammad Khoiruddin Endang Retnoningsih Syahbaniar Rofiah ##submission.copyrightStatement## 2024-03-31 2024-03-31 12 1 127 138 10.33558/piksel.v12i1.9261 Policy of Academic Revitalization through Information Technology for Quality Management Enhancement in Private Higher Education Institutions in Indonesia https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8332 <p>Private higher education in Indonesia faces challenges in improving educational quality to meet global demands. The policy of Academic Revitalization based on Information Technology (IT) emerges as a crucial strategy in addressing quality management changes. This research explores the implementation of this policy to enhance educational quality in private higher education institutions in Indonesia using seven variables. The research methodology involves a literature review and policy documentation analysis using Smart PLS. The research findings indicate that two variables were rejected due to being below the acceptance threshold. Five variables were accepted: Technology Alignment (3.258), Higher Education Quality Management (3.278), Moderating Effect 1 and 2 (both above 2.00), and the last variable, Revitalization of Academic Policies (2.614). However, challenges such as limited infrastructure, training needs, and appropriate policies remain significant issues to be addressed. In conclusion, the policy of Academic Revitalization based on IT provides a strong foundation for quality management changes in private higher education institutions in Indonesia. However, sustained commitment and significant investment are required to achieve optimal results.</p> Anuar Sanusi Firmansyah Firmansyah Muhammad Said Hasibuan Nurfiana Nurfiana Novi Herawadi S ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 139 148 10.33558/piksel.v12i1.8332 Sales Information System Utilizing 13.56 MHz RFID Member Cards for Enhanced Efficiency in Cooperative Stores https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9334 <p>This research aims to produce an output in the form of a cooperative sales application to its members using a 13.56 MHz RFID membership card. The research was conducted at Toko Koperasi Ubhara Jakarta Raya, which is a cooperative owned by employees of Universitas Bhayangkara Jakarta Raya, from January 2024 to February 2024. The cooperative membership card, which contains a 15.56 MHz RFID chip, can be used to validate cooperative member data when shopping at the cooperative store. With this application, it is hoped that it can simplify sales transactions for members and minimize input errors by store personnel. The system development method in this research uses the prototype method, the application is developed using native PHP programming language, and the database used is MySQL. The application created is expected to assist the cooperative in selling its products using a 13.56 MHz RFID card for better data management and quick presentation of sales reports.</p> Dani Yusuf Denis Ahmad ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 149 160 10.33558/piksel.v12i1.9334 Determining Sales Patterns of Beauty Products Using the Apriori Algorithm in Data Mining https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9308 <p>The use of data mining technology is a must to extract information that can help in making better decisions, especially in the beauty product industry, where competition is getting tougher. Changes in lifestyle and an increase in people's income lead to an increase in public consumption of beauty products. From these problems, a data mining system was created to determine the sales pattern of beauty products using the Apriori algorithm method. The goal is to get information about products that are often purchased by consumers so that they can prepare their needs with business strategies. The use of Apriori can perform the process of extracting information from the database to find association rules between a set of data or a combination of items/itemsets. The results of this study formed an application that was built using the Python programming language to analyze product sales at Underprice Skincare stores using the apriori algorithm. The data generated from the application process of data mining will be used as a reference for stores to prepare stock availability and can design the right business strategy to increase sales of beauty products at Underprice Skincare stores.</p> Windi Maharani Raissa Amanda Putri ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 161 172 10.33558/piksel.v12i1.9308 Implementation of Digital Forensics Photorec in Recovering Lost Files on External Storage https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9444 <p>Portable data storage devices, such as flash drives, are one of the most widely used data storage media today. It has a fairly large storage capacity and is easy to carry around. However, flash drives are also prone to damage, such as lost or deleted files. Damage to files on a pen drive can be caused by various factors, such as user error, viruses, or physical damage. File damage caused by user error, such as accidental deletion of files, can be easily repaired using file recovery software. One of the popular file recovery software is Photorec, which is an open-source software that can be used to recover various types of files, including photos, videos, documents, and other files. Photorec uses the file carving method to recover lost or deleted files. The file carving method is a file recovery method that works by looking for intact blocks of data within the storage media. These intact data blocks are then identified as specific files. This research aims to determine the effectiveness of Photorec in recovering lost files on a flash disk. This research uses an experimental method by simulating file corruption on a flash disk in Bina Darma University. File damage is done by accidentally deleting files. The results show that Photorec can recover lost files on flash drives with a high success rate. Photorec can recover lost files intact, including photos, videos, documents, and other files.</p> <p>&nbsp;</p> Rahmat Novrianda Dasmen Asti Triwulanda Rasmila Rasmila Dedi Kurniawan Julia Julia ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 173 178 10.33558/piksel.v12i1.9444 Event Management System for Faculty of Mathematics and Natural Sciences Organizers https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9470 <p>The advancement of technology in today's era has led to increased demands across various sectors, including Event Organizer (EO) Professional Service Providers. As a pivotal institution in scientific and academic advancement, the Faculty of Mathematics and Natural Sciences (FMIPA) at Universitas Pakuan regularly hosts a multitude of events ranging from seminars to workshops. However, the complexity of managing these events, exacerbated by varying participant numbers, presents substantial logistical, administrative, and communication challenges. FMIPA has witnessed a surge in event frequency and complexity in tandem with the growth in student enrollment, research, and academic collaboration. This paper underscores the critical importance of effective event management at FMIPA, emphasizing the necessity for an integrated and structured Event Organizer Management System. This system aims to address challenges such as team coordination, budget monitoring, and post-event reporting. By acknowledging the dynamic educational landscape and the imperative to meet high-quality standards, this research aims to contribute positively to FMIPA's institutional development. The proposed system seeks to enhance efficiency, effectiveness, and the overall impact of each scientific activity. Focusing specifically on FMIPA's logistical and administrative challenges during event organization, this study aims to design, develop, and implement an Event Organizer Management System tailored to FMIPA's unique requirements. The system targets improved event planning, streamlined participant registration, and structured logistics coordination, ultimately aiming to elevate operational efficiency and event quality. The success of the system hinges upon user involvement throughout the development cycle, ensuring alignment with FMIPA's evolving needs and fostering a culture of continuous improvement. Through this research, concrete solutions are expected to emerge, enhancing FMIPA's academic competitiveness and institutional standing.</p> <p>&nbsp;</p> Agung Prajuhana Putra Lita Karlitasari ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 179 188 10.33558/piksel.v12i1.9470 Determining Sales Patterns Using the Apriori Algorithm: A Case Study of Unlocked Cafe's Website Applications https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/8908 <p><em>In the business world, the sales process is the key to a company's success. Business processes will involve a lot of transaction data which will increase over time. This accumulation of data will not provide meaningful information if it is not processed and utilized properly. Correct decision making is obtained from accurate and informative data. This research was conducted to analyze, simulate and digitize data in the form of a website-based system which can be used as recommendations in making business decisions. The application of the Apriori algorithm supports system development in determining sales patterns by providing an overview of sales patterns for products of interest so that sales association rules are obtained. This research dataset was taken from transactions at the Unlocked Café &amp; Coffee shop. The result of this research is an application designed according to the needs of business owners in the form of selecting itemsets by applying the Apriori algorithm to produce output in the form of product stock reference data and product sales patterns.</em></p> Rafika Sari Nur Helmy Allan Desi Alexander ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 189 200 10.33558/piksel.v12i1.8908 Expert System for Chiller Machine Damage Detection Using Forward Chaining Algorithm https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9488 <p>The causes of damage to the chiller machine can be sorted in a logical sequence to find the cause of damage to the chiller machine, so that users can immediately find out the cause of the existing damage. An expert system is a computer program that contains knowledge from one or more human experts about a specific field. With this system, it is hoped that users can easily find out about damage and how to handle it on the machine. Observations were carried out directly on the research object, namely PT Indofood CBP, because the way to observe the research object is to understand the needs of the research object so that the system built can meet the needs of the user concerned. Starting from minor problems to serious problems, apart from that, we also test the running of the chiller until the operation of every machine that requires supply from this chiller machine. This system was created with the aim of making it easier for users if they experience difficulties in carrying out repairs or troubleshooting the chiller machine. So that you can get solutions based on previous experiences carried out by Engineers. After collecting analytical data to overcome troubleshooting, the design stage is carried out to create an expert system for detecting damage to machines and how to handle repairs based on the experience that has been provided.</p> Achmad Noeman Atsal Adriansyah Abrar Hiswara Dian Hartanti Prio Kustanto Hafizah Hafizah ##submission.copyrightStatement## 2024-04-09 2024-04-09 12 1 201 208 10.33558/piksel.v12i1.9488 Sentiment Analysis of Application Reviews using the K-Nearest Neighbors (KNN) Algorithm https://jurnal.unismabekasi.ac.id/index.php/piksel/article/view/9490 <p>Product reviews play a crucial role in evaluating user satisfaction and overall performance. Vidio, one of the over-the-top (OTT) media platforms, offers a wide range of entertainment content, including movies, TV shows, sports events, music shows, lifestyle programs, and more, accessible through its application. Users have the opportunity to provide reviews and feedback on their experience with the Vidio application. Therefore, this research was conducted to analyze user sentiment towards the Vidio application on the Google Play Store platform using the K-Nearest Neighbors (KNN) method. Data for sentiment analysis were randomly selected from the Vidio application based on the most relevant reviews. A total of 3,000 data were analyzed, with 2,238 data in the negative class, 508 data in the neutral class, and 254 data in the positive class. This research used the K-Nearest Neighbors (KNN) method for classifying reviews based on negative, neutral, and positive classes, and the Multiclass Confusion Matrix for model evaluation. With a data split of 70% for training data 30% for testing data, and several n_neighbors of 10 data, the results in an accuracy of 81.6%, precision of 79%, recall of 81.6%, and F1-Score of 77%.</p> Damar Wijati Prima Dina Atika Siti Setiawati Rasim Rasim ##submission.copyrightStatement## 2024-03-30 2024-03-30 12 1 209 218 10.33558/piksel.v12i1.9490