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All Journal JMPM (Jurnal Material dan Proses Manufaktur) Pendas : Jurnah Ilmiah Pendidikan Dasar JASEE Journal of Application and Science on Electrical Engineering
Krisdiyanto
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Control & Systems Engineering Electrical & Electronics Engineering Engineering Mechanical Engineering Other

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A Case Study of Risk-Based Inspection Implementation in Diesel Fuel Distribution Pipelines Patria, Mochamad Febrian Adhi; Umam, Mukhamad Faeshol; Krisdiyanto
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 2 (2024): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i2.25689

Abstract

Distribution pipes play an important role in the oil and gas industry, allowing fluids such as crude oil, natural gas, and processed products to move. X Company, an oil and gas company, uses these pipelines to transport diesel fuel from the refinery unit to storage tanks. Proper inspection and maintenance of this pipeline is critical to avoiding issues such as corrosion, cracking, and material failure, which can jeopardize safety, finances, the environment, social stability, legal compliance, and business continuity. This study evaluates a risk-based inspection methodology for ten thickness measurement locations on diesel fuel distribution pipelines using the API 581 standard. The procedure includes a literature review, data collection, assessment of remaining life, calculation of the probability and consequence of failure, risk profiling, and the development of an inspection plan. The results indicate that the pipelines have an average remaining life of 13.14 years. Nine thickness measurement locations were classified as 1C and one as 2C, placing them in the medium-risk category. Every three years, a re-inspection plan is proposed that includes both a 100% visual inspection and targeted non-destructive testing using ultrasonic thickness readings. This study demonstrates how risk-based inspection concepts can be used in practice to improve pipeline integrity inspection procedures. The findings include practical recommendations for increasing safety and operational reliability while reducing inspection costs and risks associated with diesel fuel distribution pipelines.
PENGENDALI ALIRAN AIR BERDASARKAN PEMANTAUAN INTENSITAS UV LAMP STERILIZER PADA PRODUKSI AIR MINUM DALAM KEMASAN BERBASIS IoT Krisdiyanto; Istiadi; Muhsim, Mohammad
JASEE Journal of Application and Science on Electrical Engineering Vol. 6 No. 2 (2025): JASEE-September
Publisher : Program Studi Teknik Elektro - Fakultas Teknik - Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jasee.v6i2.05

Abstract

Bottled drinking water production requires reliable sterilization to ensure microbiological safety after groundwater filtration. Ultraviolet lamps are commonly used as sterilizers; however, decreased light intensity can reduce sterilization effectiveness and affect product quality. This study aims to design and evaluate an Internet of Things-based online monitoring system integrated with Telegram to supervise ultraviolet lamp performance and control product return when the lamp intensity declines. The system was developed using a light-intensity sensor placed at several distances from the ultraviolet lamp, a controller, Telegram notification, and an automatic return valve. Experimental testing was conducted by observing the relationship between sensor distance and received ultraviolet light intensity, followed by regression analysis to determine the warning threshold. The results show that the received light intensity decreases as the sensor moves farther from the ultraviolet lamp, following an exponential trend with a coefficient of determination of 0.8396. When the detected intensity falls below the 75% threshold, the system sends a Telegram warning and activates the return valve to redirect the product to the previous process. Therefore, the proposed system can support real-time monitoring, preventive maintenance, and quality assurance in bottled drinking water production.
ANALISIS PENERAPAN PROBLEM BASED LEARNING MELALUI PROYEK DIORAMA DALAM MENDORONG KETERLIBATAN PESERTA DIDIK Mufihatun, Irma; Krisdiyanto
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 Nomor 03, September 2026 Published
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.64595

Abstract

This study examines the implementation of the Problem Based Learning (PBL) model through a diorama project in encouraging student engagement in a Natural and Social Sciences (IPAS) lesson. The research was motivated by the demand of the Kurikulum Merdeka for student-centred learning that actively involves learners, whereas classroom practice still tends to be teacher-dominated. This study aims to describe the implementation of PBL through the diorama project and to analyse the forms of behavioural, emotional, and cognitive engagement that emerge among students. A qualitative descriptive approach with a case-study design was used, and data were collected through direct observation of guided teaching practice in a fourth-grade class of 20 students at SD Negeri Trangsan 01. The results show that PBL, combined with the "Environmental Hero" diorama project, encouraged student engagement through orientation and apperception activities, problem identification from video stimuli, group investigation in constructing the diorama, presentation of group work, and closing reflection. Students demonstrated active participation, positive enthusiasm, cooperation, and critical thinking, although time management during the presentation and educational-game sessions still needs improvement. This study concludes that the PBL model through project-based, hands-on media such as dioramas is effective in fostering multidimensional student engagement in elementary science learning
Co-Authors Istiadi Mufihatun, Irma Muhsim, Mohammad Mukhamad Faeshol Umam Patria, Mochamad Febrian Adhi