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All Journal HUMANIORASAINS Technema: Journal of Intelligent Engineering and Computing
Beni Rahmat Jaya Nazara
Universitas Bina Sarana Informatika
Arts Humanities Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences

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IMPLEMENTASI ALGORITMA C4.5 UNTUK ANALISIS DAMPAK NEGATIF GELOMBANG ELEKTROMAGNETIK TELEPON SELULER TERHADAP OTAK PADA PERIODE 2019-2023 Muhammad Fadly Yassin; Beni Rahmat Jaya Nazara; Dilvan Qiblatain; Kemas Muhammad Rafli Azhary; Muhammad Rizky Andika; Farhan Aditya Hidayatulloh; Baginda Oloan Lubis
Jurnal Humaniora & Sosial Sains Vol 2 No 1 (2025)
Publisher : Pojok Publisher

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Electromagnetic waves are formed from a combination of interacting electric and magnetic waves. The source of these waves can come from natural phenomena or man-made devices. Electromagnetic waves can propagate in all directions (omnidirectional) or in a directional manner, depending on the device and media used. As technology advances, the intensity of electromagnetic radiation from various devices continues to increase, with varying impacts on human health. Excessive and prolonged use of mobile phones can increase the risk of health problems, such as brain tumors (glioma and acoustic neuroma), as well as impaired cognitive function, including working memory deficits and behavioral changes that indicate damage to the hippocampus. This shows that radiation from mobile phones has a real impact on brain health. For this reason, disseminating information on how to prevent the negative impacts of mobile phones is very important, especially for vulnerable groups such as children and adolescents. In order to further understand the impact of electromagnetic waves, a study was conducted using the C4.5 algorithm which produces a decision tree model. This analysis provides insight into risk patterns, where the duration of mobile phone use and the distance of the device from the head are the main factors that affect brain health. The results of the study showed that using a mobile phone for more than 4 hours per day, especially at close range (less than 10 cm), significantly increased the risk of health problems such as headaches, sleep disorders, and decreased cognitive function. These findings emphasize the importance of using mobile phones wisely to minimize health risks.
Implementation of a Web-Based Tofu Sales Information System at Sari Murni Beni Rahmat Jaya Nazara; Achmad Praditya; Moh. Raffles Zein; Lydia Salvina Helling
Technema: Journal of Intelligent Engineering and Computing Vol. 1 No. 4 (2026): :December: Technema: Journal of Intelligent Engineering and Computing
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

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Sari Murni, a tofu manufacturer in Pondok Labu, relied partly on manual records for orders, payments, and transaction documents, making records difficult to trace and increasing the risk of inconsistent information. This study implemented a web-based sales information system integrating product and customer management, orders, production, delivery, invoices, payments, accounts receivable, and reporting. Requirements were collected through a literature review, direct observation, and interviews with the enterprise owner, and development followed the iterative Prototype model. The application was constructed using PHP, CodeIgniter 3, MySQL, and Apache through XAMPP, with separate Administrator and Customer access roles. Black-box testing examined authentication, master data, orders, transaction documents, financial records, and reporting, while white-box inspection evaluated authentication and payment-processing logic. All documented functional testing categories produced their expected outcomes. The implemented application centralized transaction records, generated invoices and delivery notes, recorded full and partial payments, updated outstanding balances, retained payment histories, and presented period-based sales reports. These findings demonstrate functional integration of sales and receivables administration tailored to the enterprise's operational workflow. However, improvements in processing time, error frequency, and operating costs were not quantitatively measured. Further evaluation should investigate sustained use, system reliability, and operational performance under routine sales and production operating conditions.  
Co-Authors Achmad Praditya Baginda Oloan Lubis Dilvan Qiblatain Farhan Aditya Hidayatulloh Kemas Muhammad Rafli Azhary Lydia Salvina Helling Moh. Raffles Zein Muhammad Fadly Yassin Muhammad Rizky Andika