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All Journal APTEK Scientific Journal of Informatics
Eka Ariefyanto Putra
Unknown Affiliation
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering

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Effect of Recondition of Fracture Shaft Palm Lorry Using The Shielded Metal Arc Welding Process Hakim Nasution, Lukman; Eka Ariefyanto Putra; Gapar; Fajar Budiman; Rama Yoedha Satria; Andersen; Sofyan Hadi; Ferry Adriyan; Nasrol Akmal; Rinaldi; Nazaruddin; Safril Safar; Heri Suripto
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 16, No. 02, Juni 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v16i2.2694

Abstract

Examination and analysis of the 2,640 working hours AISI 1045 palm lorry shaft fracture were carried out to determine the effect of reconditioning using Shielded Metal Arc Welding on the reliability of the shaft. Laboratory test results and analysis showed that the shaft experienced a static brittle fracture at an angle between 65 mm diameter and 90 mm diameter. For a long time, evidence of weld defects in the form of inclusions, porosity, and cold cracks in the Heat Affective Zone has been observed. The various hardness levels in the weld metal are 200 to 210 HV; HAZ is 280 to 386 HV, and base metal is 202 to 210 HV due to oxygen affecting on shaft's mechanical qualities deterioration. When the martensitic structure is produced, the carbon equivalent value rises to 15.66%, over the minimum value of 0.65%, reducing shaft reliability and triggering the occurrence of static brittle fracture. The macro-micro structure at the initial area of crack and fracture is bainite and ferrite-pearlite, while the shaft base material is ferrite-pearlite. Furthermore, there is a difference in tensile strength between the shaft material and the power of the electrodes utilized in the reconditioning process. From this experiment, the recondition
Sensor Integration and ARIMA-Based Forecasting in WAQMS for Environmental Monitoring in Riau Province, Indonesia Warnia Nengsih; Cyntia Widiasari; Putri Madhona; Helmi Chazali Lubis; Indra Agus Lukman; T.Marlina Cahyani; Elnovrian Purnama Saghita; Muhammad Saputra; Felix Gary; Eki Haiyal'ulya; Irwan Chandra; Aulia Gusri Pratama; Eka Ariefyanto Putra; Rama Yoedha Satria; Shinta Utiya Syah
Scientific Journal of Informatics Vol. 12 No. 3: August 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v12i3.24742

Abstract

Purpose: This study aims to develop an integrated solution for real-time environmental monitoring in Riau Province, Indonesia, where air and water quality are increasingly impacted by industrial, agricultural, and climatic factors. Existing monitoring systems are often limited by their lack of real-time capabilities and predictive analytics. Methods: To address this, we designed the Water and Air Quality Monitoring System (WAQMS), which integrates sensor-based data acquisition with the Autoregressive Integrated Moving Average (ARIMA) model for forecasting. Sensor units were deployed across three pilot locations—Kampar, Siak, and Pekanbaru—to continuously collect environmental data. The ARIMA model was applied to historical datasets to predict future trends in air and water quality, while a web-based dashboard was developed to visualize real-time data and forecasts. Result: Calibration results showed a system accuracy of 85%, surpassing the national threshold of 75% set by the Indonesian Ministry of Environment and Forestry. This validates the use of WAQMS for Air Pollution Standard Index (ISPU) classification. Novelty: The novelty of this study lies in the seamless integration of AQMS and WQMS within a unified predictive monitoring system, combined with a user-friendly interface for stakeholders. The results demonstrate the system's potential as a decision-support tool for local governments, offering timely insights and enabling more effective and sustainable environmental management.
Co-Authors Andersen Aulia Gusri Pratama Cyntia Widiasari Eki Haiyal'ulya Elnovrian Purnama Saghita Felix Gary Ferry Adriyan Gapar Hakim Nasution, Lukman Helmi Chazali Lubis Indra Agus Lukman Irwan Chandra Muhammad Saputra Nasrol Akmal Nazaruddin Putri Madhona Rama Yoedha Satria Rinaldi Safril Safar Shinta Utiya Syah Sofyan Hadi Suripto, Heri T.Marlina Cahyani Warnia Nengsih