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Website security is an important aspect of designing a website and managing web systems. However, many developers still pay little attention to security aspects from the early stages of development. In fact, the website that has been built will be the target of attacks by hackers at any time. Therefore, this research aims to analyze the vulnerability of the SMAN 1 Banjar Agung website based on the OWASP Top 10 standard. The research method was conducted through vulnerability assessment using OWASP ZAP tools with the stages of spidering, passive scanning, and active scanning. This test allows identification of vulnerabilities such as SQL Injection, Cross-Site Scripting (XSS), and security configuration weaknesses. The scan results showed eight vulnerabilities, consisting of two medium, three low, and three informational vulnerabilities. Although the risk level is low, the website still requires mitigation through the application of security headers, dependency updates, and removal of sensitive information to make the system more secure and stable.

Crime, an unlawful act that contradicts ethics and norms, has now become a primary factor for the police in Lampung province. This presents a challenge for the police institution in predicting high crime rates. However, there are still many crimes that have not become the main focus of problem-solving at the Lampung Regional Police.This research aims to identify the types and criminal acts of crime with the highest recorded incidence in a crime dataset by performing classification using the Naïve Bayes algorithm. The data was obtained from investigators at the Directorate of General Criminal Investigation of the Lampung Regional Police, with a total of 12,034 JTP (Total Criminal Acts) and 7,518 PTP (Crime Resolution) data points for each type of crime, distributed across the Regional Police, City Police, and District Police throughout Lampung province. The classification process using the Naïve Bayes algorithm reveals the relationship between the work unit (Satker) and the type of crime handled, thereby identifying crime patterns based on the location where they are handled. The results of the research, which involved converting numerical data into binomial (binary) form using the "Numerical to Binominal" feature in Rapid miner, show that the analysis and modeling process, especially in algorithms like Naïve Bayes or decision trees, is more effective when using data in a binary format. Thus, the initial dataset can be visualized in the form of a , with the size of the text varying according to the level of each high-incidence crime; the larger the text, the more frequently or significantly the crime occurred or was reported. The application of this method can help in identifying patterns, dominant trends, and areas of focus for more targeted law enforcement efforts or crime prevention policies.

CV KIA is a shop engaged in the field of computer sales and services, coming directly to make transactions and provide computer service information services. So there are obstacles that are quite time consuming and transportation costs for customers to find out information on goods, stock of goods, and the process of purchasing goods because customers have to come directly to the store. Product information on CV Kia cannot be updated in real time so that there is a delay in calculating stock of goods. The method used in this study is the prototype development method and is designed using UML. This system uses two programming languages, namely PHP. Implementation using the Xampp application, and MySQL. The results of this study are the design and creation of a web-based sales information system. The system that is built will also later facilitate the sales transaction process which can later reduce the level of competition with the outside market. This system displays information about product sales, and can carry out the sales transaction process so that customers do not need to come to the store to get information and make product purchases. The results of testing that has been carried out involving 10 Respondents that the conclusion of the quality of the feasibility of the software produced has a percentage of success with an average total of 100%.  Keywords: Sales, Prototype, PHP, Information Systems, Sublime Text

This research examines the application of the Elliptic Curve Digital Signature Algorithm (ECDSA) in a blockchain system as a security solution for digital payment systems in Indonesia. Using a descriptive-qualitative approach based on literature review and conceptual simulations using Python, this study discusses the working principles of ECDSA, its advantages over other digital signature algorithms, and the challenges of its adoption in Indonesia. The results show that ECDSA provides high cryptographic efficiency, maintains transaction authenticity and integrity, and supports a transparent decentralized system. The academic simulations include not only KYC processes, top-ups, transactions, validation by validators, and block recording, but also demonstrates the formation of an interconnected multi-level blockchain and tests scenarios for rejecting manipulated or invalid transactions. The contribution of this research lies not only in the theoretical review but also in the implementation illustrations that can be used as a basis for education and the initial development of blockchain-based digital payment systems. The research results show that ECDSA is capable of providing a high level of efficiency in the encryption and transaction verification process, maintaining data integrity and authenticity, and supporting a decentralized and transparent system. The academic simulations included the KYC process, wallet creation using ECDSA keys, balance top-ups through bank integration, transaction creation and validation, and block recording in the blockchain. Specifically, the simulations successfully demonstrated how new blocks are added to the chain by referencing the previous block's hash, as well as how transactions with corrupted signatures, manipulated amounts, or insufficient balances are automatically rejected by the validator consensus mechanism, maintaining system integrity. This research contributes not only theoretically, but also through conceptual representations that can be used as an educational foundation and for the initial development of blockchain-based digital payment systems in Indonesia.

As a vocational education institution, SMK Swadhipa 1 Natar is required to provide adequate facilities to support the development of its students' technical and practical skills. Although some facilities are already available, student complaints remain regarding the condition, availability, and utilization of these services, particularly those related to information technology.This study aims to analyze the level of student satisfaction with information technology services at SMK Swadhipa 1 Natar using a combination of Customer Satisfaction Index (CSI) and Importance Performance Analysis (IPA) methods. The study was conducted through a quantitative approach by distributing questionnaires to 100 respondents selected using stratified random sampling techniques. The data collected were analyzed to determine the overall satisfaction score and identify factors of information technology services that were a priority for improvement. The results of the CSI analysis showed that the level of student satisfaction with school information technology services was in the good category, with an average score of 82%. Furthermore, the results of the IPA analysis revealed that information technology services such as computer services in the school lab, wifi networks, and school websites consisting of school exam applications, student registration applications and information about the school on the website were in the top priority quadrant because they had a high level of importance but their performance was still low. Based on these results, it can be concluded that although in general students stated that they were quite satisfied with the information technology services available, there were several important aspects, especially technology-based information technology services, that needed more attention from the school. Thus, recommendations for improving technological infrastructure and periodic evaluation of educational information technology services can help SMK Swadhipa 1 Natar in improving the quality of educational services and student satisfaction. 

Behind the success of the Free Nutritious Meal Program (MBG), there are several problems related to the health factors of the program targets, namely, there are several cases of allergies that occur in schools, inadequate understanding of allergen management owned by food processing vendors, and the high cost of laboratory tests and the process that takes a long time. So, to overcome these problems, an application is proposed that can help detect allergens in food products using data mining and machine learning approaches. SVM and AdaBoost algorithms each have advantages that can be used to help build an optimal allergen detection model. This research uses a cross-validation model validation method with a value of K = 10 to help improve the performance of the model built. In this study, from the entire fold, an average accuracy value of 98.74% was obtained. To evaluate the model built, this research has also conducted several new data inputs, and in each new data input, the accuracy value is obtained above 99%. This indicates that the model built, namely the combination of SVM and AdaBoost algorithms with the cross-validation model validation method, produces high accuracy, so this model can greatly assist the allergen detection process in food products.

Since 2022, the application of the Internet of Things (IoT) in the healthcare sector has grown significantly, marked by the increasing adoption of wearable technology, artificial intelligence (AI), machine learning (ML), and blockchain integration. Research highlights India and China as leading contributors in this domain. IoT enables real-time monitoring of chronic diseases, tracking of patient vital signs, and detection of health protocol compliance. Integrated systems such as Monit4Healthy and RADAR-IoT support personalized medical recommendations and cross-platform interoperability. However, key challenges persist, including patient data privacy and security, system interoperability issues, data fragmentation, and barriers to user acceptance due to cost, digital literacy, and device comfort. Proposed solutions include blockchain for secure data sharing, adaptive congestion control for network performance, and user training to improve technology adoption. Therefore, successful IoT deployment in healthcare requires a comprehensive approach that addresses technological, social, ethical, and sustainability aspects to achieve an effective and inclusive transformation of health services.

This study aims to investigate the factors influencing the continuance intention of Al-Kautsar Senior High School students in using metaverse-based learning media. The background of this research lies in the rapid adoption of immersive technologies in education, while students’ levels of acceptance have not yet been fully understood. The objective is to identify the antecedents of satisfaction, which subsequently influence continuous intention. The research model examines the effects of perceived interactivity, perceived sociability, perceived enjoyment, perceived ease of use, perceived security, and social influence on satisfaction. A quantitative approach was employed by distributing questionnaires to students, and the data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results indicate that satisfaction is a very strong and statistically significant predictor of continuous intention to use metaverse applications (β = 0.716, p < 0.001). The six hypothesized antecedent variables were not found to have a significant individual effect on satisfaction. In conclusion, for digital native students at Al-Kautsar Senior High School, factors such as ease of use, interactivity, and enjoyment have shifted from being drivers of satisfaction to becoming basic expectations (hygiene factors). Satisfaction itself emerges as the primary determinant, likely influenced by more substantive elements such as content quality or pedagogical design rather than merely the technical features of the platform.

Credit card fraud is a critical issue in digital financial transactions. This study aims to develop and evaluate fraud detection models using Logistic Regression and Gradient Boosting on an imbalanced dataset, where fraudulent transactions constitute only a small portion of the data. To address this imbalance, the Synthetic Minority Over-sampling Technique (SMOTE) was applied during preprocessing. Logistic Regression, used as a baseline model, achieved 95% accuracy, 78.6% precision, 55.9% recall, and a 65.3% F1-score. After applying class weighting and SMOTE, recall improved to 88.7%, but precision dropped to 52%, indicating that the model became overly sensitive and prone to false positives. Gradient Boosting initially produced better results, with 98% accuracy, 95.5% precision, 84.3% recall, and an 89.5% F1-score. After hyperparameter tuning and resampling, its performance improved further to 96.7% precision, 86.1% recall, and a 91.1% F1-score. These results indicate that Gradient Boosting is more effective in handling imbalanced data and offers greater reliability in detecting fraudulent transactions. The findings support the growing evidence in favor of ensemble learning techniques in fraud detection applications. This research contributes practical insights into improving the accuracy and security of machine learning-based fraud detection systems in financial services.

This study evaluates the efficiency of two artificial intelligence models, DeepSeek and OpenAI, in generating code for algorithmic systems. Efficiency is assessed through execution speed, code accuracy, and the number of code characters produced. Data were collected from 100 tests covering search, sorting, graph, dynamic programming, optimization, data processing, text, and machine learning algorithms. The objective is to compare the performance of both models to support the development of efficient information retrieval systems. The method involves algorithm testing with statistical analysis of execution time, accuracy, and code length. Results indicate that DeepSeek has an average execution time of 28.74 seconds, slightly slower than OpenAI’s 28.49 seconds. However, DeepSeek’s accuracy (85.88%) surpasses OpenAI’s (85.03%). The average number of code characters is identical at 96.35 characters. The study concludes that DeepSeek excels in accuracy, while OpenAI is faster in certain cases, providing valuable insights for developers in selecting AI models for information retrieval applications.

The bodywork industry in Indonesia is under high competitive pressure, requiring companies to be more adaptive in understanding customer behavior in order to maintain business continuity. PT. Bengawan Karya Sakti as one of the national bodywork companies, has not optimally utilized historical transaction data to assess customer loyalty. This study aims to identify customer loyalty segmentation through the application of the RFM (Recency, Frequency, Monetary) method, which is used to analyze sales transaction data in 2022 and 2023. The study uses the CRISP-DM approach which includes the stages of business understanding, data exploration, data cleaning and processing, modeling, evaluation, and implementation of results. The transaction data analyzed includes attributes of transaction date, customer, number of transactions, and transaction value, which are then processed into RFM scores based on the transaction year and classified into categories such as Very Loyal, Loyal, At Risk, and others. The segmentation results show an increase in the number of very loyal customers from 2022 to 2023, as well as a significant decrease in inactive and at-risk customers. The chi-square statistical test shows that the difference in customer distribution between years is statistically significant (p-value <0.05), indicating a real influence from the company's strategy or external factors. The main conclusion of this study is that the RFM method is effective in the bodywork industry to support data-based marketing decision making and more targeted customer retention strategies.

Maraknya kasus kecurangan atau manipulasi dokumen sertifikat atau piagam penghargaan pada proses Penerimaan Peserta Didik Baru (PPDB) di berbagai wilayah di Indonesia, menjadi permasalahan yang serius untuk diselesaikan. Tindakan ini dapat merugikan para siswa yang telah berprestasi secara jujur, merusak kepercayaan masyarakat terhadap integritas pendidikan dan kredibilitas sistem PPDB itu sendiri, sehingga berdampak pada kepercayaan masyarakat kepada institusi atau lembaga pendidikan dan pemerintah. Metode penelitian yang dipergunakan adalah case studies research. Peneliti menggunakan metode Rapid Application Development (RAD) untuk pengembangan sistem dan blackbox testing berbasis equivalent partition untuk metode pengujian sistem. Berdasarkan hasil blackbox testing berbasis equivalent partition, bahwa sistem informasi verifikasi online yang dibangun, secara keseluruhan fungsionalitasnya sudah berjalan dengan baik. Sistem yang dibangun juga sudah sesuai dengan kebutuhan pengguna dalam mengakomodir permasalahan terkait dengan verifikasi sertifikat secara online, sehingga dapat meminimalisir praktik kecurangan atau manipulasi dokumen sertifikat atau piagam penghargaan.

Penelitian ini bertujuan untuk mengembangkan sistem pemilihan supplier yang efektif dengan menggunakan metode TOPSIS dan pendekatan Rapid Application Development (RAD). CV. Berjaya Jaya Abadi, sebuah perusahaan kontraktor yang bergerak di bidang penyediaan berbagai jenis cat, menghadapi tantangan dalam memilih supplier terbaik di antara beberapa alternatif. Metode TOPSIS digunakan karena kemampuannya untuk memberikan hasil yang lebih objektif berdasarkan kriteria yang telah ditetapkan, dibandingkan dengan metode subjektif yang sebelumnya digunakan oleh perusahaan., mengalami kesulitan dalam menentukan supplier terbaik di antara banyak pilihan yang tersedia. Oleh karena itu, penelitian ini bertujuan untuk mengembangkan sistem pemilihan supplier menggunakan metode TOPSIS yang diimplementasikan melalui pendekatan Rapid Application Development (RAD). Sistem ini dirancang untuk mempermudah pengambilan keputusan dalam memilih supplier dengan mempertimbangkan enam kriteria utama, yaitu Pengiriman, Sejarah Kinerja, Harga, Kualitas, Loyalitas, dan Pelayanan. Hasil penelitian menunjukkan bahwa sistem yang dikembangkan dapat memberikan peringkat supplier berdasarkan kriteria yang telah ditentukan, sehingga dapat membantu perusahaan dalam memilih supplier yang paling sesuai dengan kebutuhan. Metode RAD yang digunakan dalam pengembangan sistem juga terbukti efektif dalam mempercepat proses perancangan dan implementasi sistem. Dengan pengujian Black Box Testing, sistem yang dibangun menunjukkan hasil yang memuaskan dalam mendukung pengambilan keputusan di perusahaan.

BLDC motor applications used in various forms in instrumentation, robotics, household, and transportation. One application of transportation equipment used as a propeller of electric bicycle vehicles. The value of the bicycle vehicle adjusted to the speed set, the amount that has determined. The purpose used in this study is to improve the efficiency of the regulation of BLDC motors on electric bicycles. Indicators of increasing performance are increasingly steady-state errors, and transient response required. The method used in this research is to do mathematical modeling in the form of transfer and optimization function equations. The model used is the model with the structure of the transfer function, while the optimization method used in this study is the Ziegler-Nichols method and firefly algorithm. The firefly algorithm is used in this study to obtain optimal Kp, Ki, and Kd values. The results showed that the firefly algorithm achieved better performance compared to the Ziegler-Nichols method.

Human daily life depends on air, so air quality needs to be protected especially against pollution. Decreasing air quality due to dust pollution can result in ARI. Makes it easier to measure ambient air and air temperature using internet-based technology. Designing internet-based dust and temperature measuring devices using the gp2y1010au0f type dust sensor, and DHS11 sensor as a temperature sensor, amplifier circuit, NodemCU microcontroller, and LCD (Liquid Crystal Display). The measurement application is carried out at the location of the PT. Djabus Tunas Utama Ngoro Mojokerto East Java at 10 sampling points around the mixing tube. The measurement results show the concentration carried by ambient air quality standards when the engine stops, so it is safe for employees. When the machine is mixing and the machine is not mixing (ordinary conditions) the concentration of particulates and the temperature exceeds the ambient air quality standard, for that all employees are required to use PPE.

Kota semarang merupakan daerah yang dikelola oleh pemerintah daerah kota semarang secara mandiri. Salah satu aset yang dikelola adalah aset berupa tanah dan bangunan milik pemerintah serta fasilitas umum yang ada di kota semarang. Aset tanah dan bangunan milik pemerintah kota semarang yang saat ini tercatat dalam Kartu Identitas Barang A terdapat sejumlah 3.092 bidang. Permasalahan yang muncul adalah, bahwa masih ada aset aset milik pemerintah yang tidak diketaui lokasi nya, tidak jelas status penanggung jawabnya dan belum jelas status kepemilikannya. Selain itu petugas yang silih berganti personel, sehingga pengenalan dan pelacakan aset milik pemerintah kota semarang menjadi sulit. Pengelolaan aset tanah oleh pemerintah kota semarang, saat ini dirasa kurang maksimal. Untuk itu perlu dibagun sebuah aplikasi sistem informasi geografi lokasi dan manajemen aset pemerintah kota semarang. Pengkoneksian Application Programming Interface (API) Google Maps pada website BPKAD pemerintah kota semarang akan memberikan informasimengenai lokasi aset tanah dan bangunan milik pemerintah kota semarang pada website googlemap. Website BPKAD yang terhubung ke googlemap memberikan kemudahan bagi operator untuk mengenali lokasi aset tanah dan bangunan milik pemerintah kota semarang. Keuntungan lain yang didapat yaitu meminimalkan kekeliruan dalam pengelolaan aset tanah dan bangunan.

Aplikasi Semarang Guidance dibuat untuk memberikan informasi lokasi penting bagi masyarakat yang membutuhkan petunjuk jalan lokasi wisata. Hal ini didasarkan pada masih banyak masyarakat yang belum mengetahui lokasi terdekat tempat-tempat wisata. Penelitian ini menggunakan model pengembangan SDLC. Model analisisnya menggunakan Use Case, Activity, Class Diagram, E-R Diagram dan kamus data. Manfaatnya dapat memberikan kemudahan dalam mengetahui letak dan posisi geografis tempat wisata terdekat disekitar pengguna beserta informasi pendukung dengan melalui ponsel Android. Dalam aplikasi ini menginformasikan dan visualisasi objek dalam bentuk maps. selain itu terdapat rute untuk menuju objek wisata yang dipilih, pencarian objek wisata, dan menu pendukung lainnya. Aplikasi ini berbentuk mobile application dan juga web service dengan bahasa pemrograman untuk mobile application JAVA dan SQLITE sebagai database, web service PHP dan MYSQL sebagai database.

In order to send data or information  processed by using cryptography people can use XML(eXtensible Markup Language). XML data are general texts file which consist of several different tagswhich are defined by the XML document maker. In this research, the XML data were processed by usingPassword Based Encryption cryptography. This method consists of encryption and decryption meant toalter plaintext into chipertext which in turn creates chipertext from plaintext by using password key.²The implementation of the program in this research is a prototype of Hospital’s web facilitated withencyption menus and decryption data which are meant to protect the saved data which are in turn accessedand processed by authorized people. The implementation of the program is built as a web application withJava Server Page (JSP) in NetBeans 6.0 with Password Based Encryption cryptography provided by JavaCryptography Extension (JCE).

Academic data increases every year in line with the increase of students. Abundant data store is alsoan abundance of information. Data mining technology is a tool for extracting information on largedatabases and has been widely used in many domains. Predicting student performance (study evaluation) isan activity to determine a future state based on existing data. Data in the field of academic research hasbeen done with various methods and algorithms, but the use of algorithm SLIQ (Supervised Learning InQuest) has not been done.SLIQ is an algorithm developed by the IBM's Quest project team in 1996 for mining large datasets.SLIQ algorithm classify and predict the students performance, beginning with the data cleaning, conductedelection training and testing data. By calculating gini index of each attribute and then selecting thesmallest gini index data table is split according to the criteria until find the same class. From the results ofthe calculation process can produce a set of rules that can be used to predict student performance.From the experiment it can be concluded that the algorithm SLIQ with decision tree technique canbe used as an alternative in designing a system datamining applications. Tests conducted system showedthat the constructed model can be used to predict the performance of new students. The resulting accuracyof the model system in fact has a lower score than the accuracy of other applications that are used as acomparison of Tanagra. Advantages of the proposed system is in its design does not need complexcalculations in obtaining the gini index attributes.

Penggunaan akses internet dengan metoda dial up pada suatu perusahaan internet sering dibatasi oleh anggaran dana yang  sudah ditetapkan. Dengan demikian diperlukan  suatu kontrol dalam membatasi pemakaian  pulsa  internet  agar  tidak  melebihi  anggaran  yang  sudah  ditetapkan. Maka  diperlukan  suatu program  aplikasi  untuk mengontrol  akses  internet  secara  dial  up.  Pengembangan  aplikasi menggunakan software development Visual Basic 6.0 dengan database Microsoft Access dan memanfaatkan script Win32 Internet API  (WinInet API)  pada  file wininet.dll  yang  sudah  tersedia  pada Operating  System Windows 98/2000/XP. Script Win32 Internet API merupakan salah satu bagian dari funsi – fungsi internal windows yang disebut dengan API (Application Programmer Interface). API berfungsi sebagai interface / jembatan antara windows dengan programmer. Fungsi ­ fungsi API dapat diakses oleh programmer melalui file ­ file library API untuk diaplikasikan pada suatu program. Fungsi aplikasi adalah untuk mengontrol penggunaan internet  berdasarkan  pada  pemakaian  pulsa  /  waktu.  Secara  umum  aplikasi  juga  dapat  digunakan  oleh pengguna internet dengan sistem sambungan dial up.