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JSE Journal of Science and Engineering
Published by Universitas Muhammadiyah Kalimantan Timur
ISSN : 27233944     EISSN : 27233944     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Engineering Mechanical Engineering Transportation
JSE Journal of Science and Engineering is an open-access and peer-reviewed scholarly international journal for engineers and technologist. This journal accepts unpublished research and review papers in the areas of Mechanical and Manufacturing Engineering, Structural and Civil Engineering, also Informatics and Information Technology. Potential authors are invited to submit articles in English.
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 51 Documents
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Analysis of Contract Change Order (CCO) in the Samarinda Road Preservation Project Devedo, Mochamad Gaharu; Lestari, Dyah Ayu
JSE Journal of Science and Engineering Vol. 3 No. 2 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v3i2.4227

Abstract

Road infrastructure improvement is crucial for supporting economic growth and urban development, particularly in cities like Samarinda, East Kalimantan, which faces challenges due to increasing traffic volumes. To address this, the Public Works Department initiated a road preservation project aimed at enhancing the city’s road network. However, unforeseen changes during execution, known as contract change orders (CCOs), are common in construction projects and can affect costs, timelines, and quality. CCOs often arise from fluctuating material prices, design revisions, or external factors. Effective management, including risk analysis and clear communication, is crucial for minimizing delays and cost overruns. This study examines CCOs in a road preservation project in Samarinda, focusing on their causes, impacts, and management strategies. Data collection includes primary data from the contractor’s project monitoring documents and secondary data from literature studies. Quantitative analysis is used to assess the causes and impacts of CCOs, measured by Change Order Ratio (COR) and Change Order Ratio in Addition (CORA). The research aims to identify key factors driving contract changes and analyze their effects on cost, time, and quality. For the Samarinda project, COR and CORA were both 2.54%. The contract value increased from Rp1,950,519,068.00 to Rp2,000,079,068.00 due to additional work, with a cost deviation of Rp49,560,000. Despite these changes, the cost deviation was minimal, indicating effective management of contract changes. This study emphasizes the importance of continued evaluation to minimize future changes and ensure the efficiency of road infrastructure projects.
Analysis of Route Selection Using the Analytical Hierarchy Process (AHP) in Mahakam Ulu Regency Yulfadli, Zony; Adani, Sakila Herfiana Silmy; Nafis, Mochamad Abdillah
JSE Journal of Science and Engineering Vol. 3 No. 2 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v3i2.4293

Abstract

Roads are essential infrastructure for improving the economy of the community and regional development. Good road infrastructure certainly impacts the progress of an area. As the region develops and the complexity of the district government's tasks increases, which affects the increase in vehicle traffic, new road access is needed to facilitate the mobility of officials. The Analytical Hierarchy Process (AHP) method is one of the methods used for decision-making in project feasibility studies. In this study, there are four criteria used, namely 1. Distance 2. Efficiency, and; 3. Spatial Planning Integration and aesthetics. Each of these three criteria is broken down into two sub-criteria. Questionnaires were distributed to two respondents selected proportionally, consisting of one person from the Public Works Department of Mahakam Ulu Regency and one person from the Planning Consultant of PT. TEMA KARYA MANDIRI KSO. The questionnaire results were analyzed using the Analytical Hierarchy Process (AHP) method to assess four alternative road sections to be selected. Based on the AHP analysis of the main entrance road planning in the office area of Mahakam Ulu Regency, alternative location 1 was chosen with an AHP score of 0.473, which is higher than the other three alternatives. Therefore, alternative location 1 is recommended to proceed to the next study stage (Detail Engineering Design).
Visualization of Road Performance Using PTV Vissim (Case Study of Jalan Pangeran Antasari, Samarinda City) Liana, Ulwiyah Wahdah Mufassirin; Febriyan, Muhammad Adilla
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Traffic analysis is important through better management. By analyzing traffic, urban planning can reduce congestion. Population increase in Samarinda increases traffic and causes congestion. Congestion conditions in Samarinda are getting worse because vehicles continues to increase without road improvements, especially on Jalan Pangeran Antasari. The aim of this research is to evaluate the performance of road sections using the PKJI method, providing a visual of the condition using PTV Vissim software. The survey was carried out for 3 days on Monday 26 February 2024, Friday and Saturday 1-2 March 2024 with a time span of 15 minutes with a duration of 1 hour. Held in the morning at (07:00-08:00 WITA), in the afternoon at (12:00-13:00 WITA), in the evening at (17:00-18:00 WITA). Jalan Pangeran Antasari provides a capacity of 6072 pcu/hour. The highest vehicle volume occurred on Saturday with 2418 pcu/hour, indicating that the road section is in type A with free flow conditions without obstacles, the 10-year forecasting traffic volume is 3579 pcu/hour. Based on the Samarinda City Masterplan, vehicles is estimated to grow 4% in 10 years. If the road capacity in the current year (2024) is still used to serve the vehicles that will pass in the next 10 years then the service level shows type B. Even though the level of service has decreased, the existing infrastructure is still adequate. This reduction is not yet critical so that current road and traffic facilities can still handle so there is no need for additional recommendations.
Development Of An IoT-Based Security System For Swiftlet Nests Using Esp32-Cam And Pir Sensor Arbansyah, Arbansyah; Maulidina, Gina; Nur Ilham, Muhammad Fauzan; Sumadi , Muhammad Taufiq
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v4i1.4220

Abstract

This study focuses on developing an Internet of Things (IoT)-based security system for swiftlet nests using ESP32-CAM and Passive Infrared (PIR) Sensors. The goal is to address the challenges of securing swiftlet nests located in remote areas, which are prone to theft and hard to monitor manually. The system combines motion detection, image capturing, and notification delivery through Telegram when connected to the internet. If the internet connection is unavailable, captured images are stored on a microSD card as an alternative. The research methodology includes the design of both hardware and software, implementation, and system performance testing. Test results show that the PIR sensor effectively detects motion within a 1-5 meter range, and the ESP32-CAM can capture and send images to Telegram in under 10 seconds when the network is stable. The system also reliably stores images on the microSD card when offline. This research highlights the system's ability to improve the security of swiftlet nests efficiently, offering a practical solution for farmers to monitor their nests in real-time without being physically present. The system’s flexibility and reliability make it a valuable tool for enhancing the security of agricultural resources.
Implementation of 5R Culture to Achieve Total Quality Management (TQM) at PT Aneka Dharma Persada Budiman, Rizki; Abma, Vendie; Noviandhini, Ramadhena Putri Ayu; Wibowo, Rangga Pangestu
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v4i1.4519

Abstract

The concept of 'quality' is becoming increasingly recognized across industrial sectors, as evidenced by the emergence of methodologies such as TQM, Kaizen, and Quality Circles. The 5R (Reduced, Refined, Radiant, Retain, Reliable) program, which includes Sort, Set in Order, Shine, Standardize, and Sustain, has become an essential component in enhancing efficiency and quality management within a company. This study aims to evaluate the effectiveness of the 5R program implementation on the achievement of Total Quality Management (TQM). The method of this study is a descriptive approach using a case study design and mixed methods, integrating both qualitative (field observations and interviews) and quantitative data (audit scores and monthly performance metrics). This combination enables a comprehensive evaluation of the 5R program. Data were collected through field observations, in-depth interviews, analysis of audit results, and monthly performance scores from ten work areas. Manufacturing company PT ADP, as a case study, was employed to examine the benefits of the 5R implementation in relation to TQM standards. The findings contribute to practical knowledge by demonstrating that structured implementation of 5R can significantly support Total Quality Management (TQM) in manufacturing settings, particularly in enhancing productivity, discipline, and operational efficiency. The results indicate that the 5R program can support the foundation of TQM by ensuring higher work efficiency, reduced waste, and a more disciplined and responsible work ethic. The 5R culture is essential in supporting the implementation of TQM to improve quality and innovation for sustainable growth, competitiveness, adaptability, and customer satisfaction
Raw Material Warehouse Layout Model to Improve Storage Effectiveness at PT. Papertech Indonesia Unit II Magelang Aman, Moehamad; Satya Putra, Handika; Imron Rosyidi, Muhammad
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v4i1.4730

Abstract

PT. Papertech Indonesia Unit II is a recycled paper factory that orders raw materials Old Corrugated Container (OCC) and Mix Waste (MW) is carried out every day, as a result the raw material storage warehouse often experiences excess capacity, so that its arrangement is often irregular. In order to optimize the utilization of the storage warehouse at PT. Papertech Indonesia Unit II Magelang, it is necessary to carry out a design model for the layout of the facility. One of the objectives of designing the layout of the facility is more effective use of space. The design in this study uses the method Dedicated Storage. The results of arranging paper raw materials in the warehouse using the method Dedicated Storage through addition material handling obtained a time effectiveness of 27%. Cost material handling The proposal obtained a 9% reduction in cost efficiency. Travel distance material handling on the proposed layout by 34%, with the warehouse storage capacity increasing by 10%. The proposed raw material storage warehouse layout is based on the method Dedicated Storage consists of 8 blocks, in one block consists of 6 areas, each area consists of 50 slots. The total number of slots that can be accommodated is 2,400 slots, resulting in a 25% increase in slot capacity. The floor area requirement for storing raw materials is 87.78 m x 62.24 m or 5,463 m2thus increasing the utilization of the warehouse area by 7%. The remaining unused warehouse area is 1,662 m2 with a percentage of remaining area of ​​23.32% and utilization of the remaining unused area of ​​20%.
Structure Performance on the Long Span Bridge in Riau Province (Case on Siak I Bridge) Sugeng Wiyono
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v4i1.4901

Abstract

Siak I Bridge is located in Pekanbaru City and was constructed in 1975 and used in April 1977. The bridge has undergone a functional change; initially, Siak I Bridge served as a Class IIA collector road but was later reclassified as a Class I arterial road. This change resulted in performance degradation due to cracking in the piers/columns, which has been repaired using grouting methods and reinforced with steel jackets. Cracks were also observed on the deck slab, and grouting has been applied to these cracks as well. Therefore, an evaluation of the bridge’s serviceability and a structural strengthening study are necessary. The methods used in structural assessment/research include Ultrasonic Pulse Velocity (UPV) testing, thickness test, rebar scanning, dynamic loading test and frequency testing. These tests aim to verify the bridge’s serviceability capacity. Based on the vibration frequency tests conducted on the bridge, there are three points where the actual vibration frequencies are lower than the theoretical natural frequencies. Meanwhile, thirteen other points show actual frequencies exceeding the natural frequencies. Hence, the structural health condition of Siak I Bridge comprises both healthy and unhealthy sections. Strengthening or repair was suggested on the unhealthy parts
Understanding Spatial Determinants of Urban Mobility in Makassar through Geographic Weighted Regression Irwan, Irwan; Anugrah Yanti, Suci; Akil, Arifuddin
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

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Abstract

Urban mobility patterns are influenced by a complex interplay of factors, including land use, population density, and socioeconomic conditions. This study aims to examine the spatial determinants of urban mobility in Makassar City, Indonesia, to guide targeted transportation and urban planning policies, using Geographically Weighted Regression (GWR). GWR is employed to account for spatial heterogeneity, as it captures localized variations in relationships unlike global regression models. The analysis incorporates travel time, travel cost, land use, population, and poverty data. Results indicate that the relationships between these variables vary significantly across different parts of the city. Land use, particularly the mix of residential, commercial, and industrial areas, emerges as a critical factor influencing travel patterns. Population density and poverty levels also shape mobility behaviors. The findings highlight the need for spatially targeted transportation policies and urban planning strategies to address the diverse mobility needs of Makassar's residents
Mine Road Geometric Feasibility Study Pt Mahakam Sumber Jaya Uses Manual Method Of Road Pavement Design (Mdpl) Yulfadli, Zony; Sasmoko Adi , Ari; Hermawan , Rudi
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

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Abstract

Abstract – The operational road section of PT Mahakam Sumber Jaya is a supporting tool for coal production operational activities located in Separi, Kutai Kartanegara. This study plans the geometric design and thickness of the road pavement. It attempts to review the geometric planning referring to the Bina Marga standards and re-planning using Auto CAD Civil 3D software, which is commonly used in geometric road planning, while the thickness planning of the pavement usually employs component analysis methods; however, I am re-planning using the Manual Pavement Design Method of 2024. The geometric planning of the road includes horizontal and vertical alignments, while the pavement thickness planning includes the detailed planning of rigid pavement structures. From the geometric planning results with a road length of 4.539 km, a pavement width of 2 x 3.5 m, a total of 7 curves, and a thickness of 300 mm concrete with a concrete quality of Fs 4.5 MPa, layers Foundation thickness 150 mm, LPA class A 200 mm, and selected coarse granular embankment 200 mm
Innovation in Road Construction Materials: A Study on the Combination of Biochar and Cement in Improving Subgrade Bearing Capacity Respati, Rida; Salampak, Salampak; Sarie, Fatma; Jaya, Adi
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

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Abstract

Road infrastructure development often faces significant challenges due to low bearing capacity of the subgrade, especially when dealing with peat soil. This condition can lead to excessive settlement, deformation, and premature damage to the road pavement, resulting in high maintenance costs. Peat soil is inherently poor in quality, making it uneconomical to use as a subgrade for road pavements. The condition of peat soil significantly impacts road construction in Central Kalimantan Province. Therefore, one effective way to address this issue is through soil stabilization. This research aims to explore the potential of biochar and cement as stabilizing agents to improve the bearing capacity of peat soil. The study involves a series of laboratory tests, including initial physical property tests of the original peat soil, as well as index and mechanical strength tests after the addition of a combination of biochar and cement. The biochar used in this research is derived from coconut shells.The conducted tests include compaction tests to determine the maximum dry density and optimum moisture content, and CBR (California Bearing Ratio) tests to evaluate the soil's bearing capacity. The variations in biochar and cement addition were: 5% biochar with 5% cement, 5% biochar with 6% cement, 5% biochar with 7% cement, and 5% biochar with 8% cement. The research results indicate that the addition of biochar to peat soil stabilization mixtures using cement significantly increases the CBR value. Specifically, adding 8% cement and 5% biochar to peat soil was able to increase the CBR value by up to 9% from the original soil's CBR of 2.2%. Therefore, it can be concluded that the combination of biochar and cement can transform peat soil into a usable subgrade for road construction

Page 5 of 6 | Total Record : 51

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