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JTT (Jurnal Teknologi Terpadu)
Published by Politeknik Negeri Balikpapan
ISSN : 23386649     EISSN : 24775177     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Materials Science & Nanotechnology Mechanical Engineering
JTT (Jurnal Teknologi Terpadu) dengan ISSN 2477-5177 (media online) dan 2338-6649 (media cetak), adalah jurnal ilmiah yang mempublikasikan hasil penelitian dibidang inovasi teknologi terapan dengan cakupan: Teknik Mesin, Teknik Elektro, Teknik Sipil, dan Teknik Telekomunikasi.
Arjuna Subject : -
Articles 347 Documents
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Smart Scarecrow: Pengusiran Hama Burung Berbasis IoT Menggunakan Tenaga Surya I Gede Suryananda Adikartika
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3003

Abstract

Penelitian ini menyajikan sistem Smart Scarecrow untuk mengatasi permasalahan hama burung di sektor pertanian dengan memanfaatkan teknologi Internet of Things (IoT). Penelitian-penelitian sebelumnya terkait orang-orangan sawah berbasis IoT masih memiliki keterbatasan, terutama pada aspek pemantauan dan pengendalian secara real-time sehingga fungsinya belum optimal. Sistem yang diusulkan menggunakan sensor Passive Infrared (PIR) dan ESP32-Cam untuk mendeteksi pergerakan burung serta menyediakan pemantauan secara langsung. Sistem ini ditenagai oleh energi surya melalui Solar Charge Controller (SCC), serta dilengkapi motor servo yang menggerakkan objek penghasil suara seperti tali dan kaleng untuk mengusir burung. Seluruh sistem dapat dipantau dan dikendalikan dari jarak jauh melalui aplikasi mobile Blynk. Meskipun penelitian ini tidak mengevaluasi tingkat efektivitas pengusiran burung, fokus utama penelitian adalah pada perancangan alat yang otomatis, hemat energi, dan dapat diakses secara jarak jauh. Sistem Smart Scarecrow ini diharapkan dapat mendukung konsep smart farming serta berkontribusi dalam pengembangan solusi pertanian berkelanjutan berbasis IoT.
COMPARATIVE EVALUATION OF GRADIENT OPERATORS WITH OTSU THRESHOLDING FOR MICROSCOPIC POROSITY DETECTION Himawan Wicaksono; Alamsyah - -; Suardi - -; Muhammad Malikul Mulki
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3004

Abstract

This study demonstrates the comparison of five well-known gradient operators —Sobel, Prewitt, Roberts, Scharr, and Laplacian of Gaussian (LoG)—using the classical technique of Otsu thresholding to detect microscopic porosities in SMAW welds of ship structures. This was done using 33 images of micrographs taken at 25x magnification, with all images preprocessed using standardization techniques (grayscale conversion, Gaussian filtering, and normalization), and the results were compared using six different performance evaluation criteria —Precision, Recall, F-Measure, Peak Signal-to-Noise Ratio (PSNR), Edge Co-occurrence Matrix (ECM), and Matthews Correlation Coefficient (MCC). The results indicate that the Sobel operator produced the largest PSNR value (≈42.5 dB) indicating that the Sobel operator provided the greatest fidelity in image quality. Additionally, the Scharr operator had the largest MCC (0.94) and ECM correlation (0.99), indicating that it provided the greatest reliability and coherence in texture. The Roberts operator produced the largest F-measure (0.23), indicating that it provided a good balance between the two evaluation metrics. In summary, the Scharr operator demonstrated the most consistent and interpretable performance among the three performance evaluation metrics, providing both the best visual fidelity and structural texture stability. Therefore, the proposed methodology represents a reproducible and computationally-efficient reference for automated microscopic inspections and smart NDT in maritime welding applications.
ANALISIS PENGALAMAN PENGGUNA DALAM MENGGUNAKAN LEARNING MANAGEMENT SYSTEM (LMS) AFRESTO DI SMP NEGERI 2 KUTA Ni Nyoman Ayu Puspitawati
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3008

Abstract

This study aims to analyze the user experience (UX) of the Afresto Learning Management System (LMS) at SMP Negeri 2 Kuta using the User Experience Questionnaire (UEQ) method and in-depth interviews. As a digital learning support system, Afresto's effectiveness depends on the quality of experience perceived by its users. This research employs a mixed-method approach with a sample of 269 students and 16 teachers determined through stratified random sampling. The results reveal a significant User Experience Gap (UX Gap) between the two user groups. Teachers rated the system positively across all dimensions (Good to Above Average), finding it helpful for administrative tasks. Conversely, students rated the system negatively (Bad to Below Average), particularly in the Dependability (0.72) and Attractiveness (0.65) dimensions. These findings indicate that while the system is functional for teachers, it suffers from performance issues (errors during peak loads) and an unappealing interface for students. Recommendations include server optimization (load balancing), UI modernization, navigation redesign (task-centric dashboard), and the implementation of gamification to enhance student motivation.
Integrasi Analisis Reliability Dan Availability Dalam Penentuan Interval Perawatan Optimal Excavator Faisal Rahman; Firda Herlina; Ice Trianiza; Saifullah Arief
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3017

Abstract

Effective maintenance is an essential factor in ensuring the reliability and availability of equipment, especially for heavy equipment that operates intensively. This study aims to optimize the maintenance interval of excavator units by considering the value of reliability against time, to obtain a balance between reducing the risk of failure and maximizing operational availability. Historical data of time between failures (TBF) and time to repair (TTR) were collected from a PC 200 excavator unit operating in a coal mine in South Kalimantan from January 2024 to June 2025. Initial analysis was carried out using a Pareto diagram to identify critical systems, followed by failure mode and effect analysis (FMEA) to determine repair priorities. TBF and TTR modeling were tested with four probability distributions (Normal, Lognormal, Weibull, and Exponential) using the Anderson–Darling goodness-of-fit test, with the result that both data follow a Lognormal distribution. Distribution parameters were used to calculate mean time between failures (MTBF), mean time to repair (MTTR), the reliability function R(t), and availability. The results show an increase in availability from 96.15% to 96.59% after implementing the selected distribution, as well as a decrease in MTTR from 11.21 hours to 9.92 hours. Analysis of the relationship between reliability and availability resulted in an optimal maintenance interval in the range of 230–245 hours, when reliability remains above 90% and availability is around 96%.
OPTIMASI OVERALL THERMAL TRANSFER VALUE (OTTV) PADA MASJID BAITURROHMAN DI JEMBER DENGAN PEMILIHAN KACA Auryn Lusida Amir; Indah Sari Zulfiana
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3018

Abstract

The Overall Thermal Transfer Value (OTTV) is a parameter used to evaluate the thermal performance of building envelopes in controlling heat transfer due to conduction and solar radiation. Solar radiation from glass elements can increase the heat load in mosque spaces that have relatively large openings and large volumes. Therefore, optimising glass materials is an important strategy for improving the energy efficiency and thermal comfort of buildings in tropical environments. This study aims to determine the OTTV value of the Baiturrohman Mosque in Jember using building design documents and SNI 6389:2020 requirements. In addition, this study also investigates how the type of glass selected affects the reduction in OTTV value. The method used is quantitative-qualitative, and the experimental case study method is used to compare two types of glass in the same building configuration. The variables analysed include the thermal transmittance (U-value) and shading coefficient (SC) of the glass as the main parameters that affect the amount of heat radiation entering through the façade.The calculation results show that the use of 5 mm clear glass with a U-value of 5.8 W/m²K and SC 0.97 produces an OTTV value of 36.64 W/m². Next, a material substitution was carried out using Panasap Blue Green glass with a U-value of 5.8 W/m²K but an SC of 0.67. This change resulted in an OTTV value of 30.58 W/m². There was a decrease of 6.06 W/m² or about 16.54% compared to the initial condition. This decrease shows that the reduction in the SC value directly contributes to the reduction of solar heat radiation entering through the building envelope, even though the thermal conductivity value of the glass did not change. The results of this study prove that selecting the right type of glass can be an effective strategy in optimising the OTTV value of mosques without requiring structural changes to the building facade. This strategy is relevant for application in public buildings in tropical regions to support energy efficiency and improve the thermal comfort of worship spaces.
ANALISA KIMIA SERAT PELEPAH KELAPA SAWIT (ELAEIS GUINEENSIS JACQ) METODE VAN SOEST DAN X-RAY DIFFRACTION (XRD) Martina Puspita Sari; Randis Randis; I Made Ivan Wiyarta Cakra Sujana; Elizabeth Desfelia Ciciolini Sidabutar
Jurnal Teknologi Terpadu Vol 14 No 1 (2026): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v14i1.3033

Abstract

Pelepah kelapa sawit merupakan limbah lignoselulosa yang potensial sebagai bahan baku serat alam untuk berbagai aplikasi industri. Penelitian ini bertujuan untuk menganalisis komposisi kimia serat pelepah kelapa sawit, meliputi kadar Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF), hemiselulosa, selulosa, dan lignin menggunakan metode Van Soest, serta mengidentifikasi struktur kristalinitasnya menggunakan X-Ray Diffraction (XRD). Serat pelepah sawit diekstraksi secara mekanik, kemudian dikeringkan dan dihaluskan. Analisis Van Soest dilakukan secara bertahap menggunakan larutan neutral detergent dan acid detergent. Hasil analisis menunjukkan bahwa serat pelepah sawit mengandung Dari hasil penelitian dapat diketahui bahwa serat pelepah kelapa sawit mempunyai kandungan tertinggi pada serat variasi N5H dengan selulosa 78,63%, Lignin 9,12 % dan hemiselulosa 12,25 %. Analisis XRD pada sudut 2θ menunjukkan puncak difraksi bahwa serat pelepah sawit memiliki struktur yang dominan amorf dengan nilai kristalinitas 63,02%. Morfologi pada permukaan serat pelepah kelapa sawit diamati serat terlihat lebih bersih akibat perlakuan 10% NaOH dan H2O2. Berdasarkan hasil uji van soest dan analisis XRD menunjukkan bahwa setelah dilakukan perlakuan penelitian ini memberikan data dasar yang penting untuk pengembangan serat pelepah sawit sebagai penguat material komposit yang ramah lingkungan.
Outlining the Tensile Load-Time History Behavior and Carbon Dioxide Emission of Concrete Made with Demolished Chromium-Ferrite-Magnesia Refractory Bricks Muhammad Huzair T; Afif Taufiiqul Hakim; Dwi Aneka Kartini; Komang Saka Suwindu
Jurnal Teknologi Terpadu Vol 14 No 2 (2026): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

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

Abstract

This research outlined the results of an experimental investigation of the adoption of refractory brick (RB) as a substitute for coarse aggregate in sustainable concrete production. The concrete mix is produced with two water-cement ratios (w/c) of 0.52 and 0.49, containing 0%, 15%, 30%, and 50% RB as a substitute for virgin coarse aggregate (VCA). The mechanical properties tested in this experiment are compressive strength and indirect tensile strength, as well as the relationship between tensile load and time, the ratio of CO₂ₑ to indirect tensile strength, and acceptance criteria. The test results showed that the compressive strength and indirect tensile strength value decreased along with the increasing percentage of RB adoption as in the concrete mixture. In addition, all phases in the load and time relationships, as well as CO₂ₑ, decrease as the percentage of RB in the concrete mixture increases. The results of the acceptance criteria with the adoption of RB, show that the mixture designed with the adoption of RB variations of 15% and 30% can function as an alternative to VCA. For the acceptance criteria for CO₂ₑ against indirect tensile strength based on the SAI analogy, this research provides a maximum difference limit of 20% to be declared acceptable for use as an alternative to VCA. Thus, the use of 15% and 30% RB instead of VCA is an acceptable and feasible option for sustainable concrete production.
Perancangan dan Analisis Kekuatan Rangka Chassis Mobil Listrik Tipe Tubular Space Frame Menggunakan Metode Simulasi Komputasi SHINTA TRI KISMANTI; Muh Firdan Nurdin; Andi Ard Maidhah; Dwi Lesmideyarti
Jurnal Teknologi Terpadu Vol 14 No 2 (2026): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

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

Abstract

The chassis is the main component of an electric vehicle, serving as a supporting structure for all vehicle components and receiving loads during operation. Therefore, a structural strength analysis is required to ensure the safety of the frame design before the manufacturing process commences. This study aims to design and analyze the strength of a tubular space frame for an electric car using a computational simulation approach based on the finite element method. The frame model is made in three-dimensional geometry and analyzed against static loading with varying rider loads of 46 kg, 56 kg, and 66 kg. The analysis parameters used include Von Mises stress, displacement, and safety factor to evaluate the structural response to loading. The simulation results indicate that at a load of 46 kg, the maximum Von Mises stress is 18.09 MPa, accompanied by a displacement of 0.20 mm and a safety factor of 3.03. At a load of 56 kg, the stress increases to 22.02 MPa with a displacement of 0.24 mm and a safety factor of 2.49. Meanwhile, at a load of 66 kg, a maximum stress of 25.95 MPa was obtained with a displacement of 0.29 mm and a safety factor of 2.11. This maximum stress value is still below the material's yield stress of 207 MPa, so the frame structure is still in a safe condition under the applied load.
Pengaruh Peningkatan Nilai CBR dengan Penambahan Abu Batu untuk Jalan Hauling Risma Anjelita Rusli; Totok Sulistyo; Fatmawati Fatmawati
Jurnal Teknologi Terpadu Vol 14 No 2 (2026): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

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Abstract

Soil is an essential element in road construction, including hauling road used to transport heavy loads in mining and industrial areas. However, not all soils have suitable physical properties. Clay soil with high water content is often soft, unstable, and easily deformed under pressure, which reduces the quality and durability of the road. One method to improve this condition is by adding stone ash. Stone ash is a waste product from crushing large rocks with a mechanical stone crusher and has potential for reuse in soil works. This study investigates how the addition of stone ash influences the California Bearing Ratio (CBR) value of clay soil, making it more suitable for hauling road. Tests were carried out in the laboratory using the unsoaked CBR method. Mixtures contained 10%, 20%, 30%, and 40% stone ash by dry soil weight. Preliminary tests such as water content, unit weight, specific gravity, Atterberg limits, and sieve analysis were conducted to determine soil properties. The natural soil had a CBR value of 1.27%. After adding stone ash, the values increased to 1.78% at 10%, 2.29% at 20% and 30%, and 4.07% at 40%. The highest value at 40% indicated denser soil capable of carrying heavier loads. Thus, stone ash can be used as an alternative material for clay soil improvement while supporting sustainable waste utilization
Retrofit Kontrol Kemiringan Pisau Mesin Pemotong Pelat Merek Colgar Berbasis HMI Dan PLC Omron Deko Trio Desembara; Moody Noldy Tumembow; Priyono Priyono
Jurnal Teknologi Terpadu Vol 14 No 2 (2026): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

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

Abstract

A Colgar brand plate cutting machine (Guillotine Shear) manufactured in 1995 located at the Manufacturing Laboratory at Manado State Polytechnic is not functioning properly because the blade (cutter) angle adjustment mechanism is no longer working, thereby limiting the cutting capacity and quality of the results; currently, only the up-and-down movement of the cutting blade is controlled by a relay. This research employs the Research and Development (R&D) method with a design-and-build approach, which includes analyzing the machine’s initial condition, designing the mechanical and electrical systems, programming the PLC using CX-Programmer, and designing the HMI interface. Implementation was carried out by integrating hardware and software components, followed by functional testing to measure machine performance. The results of the study indicate that the retrofit system successfully improved machine performance, where the blade tilt angle can be adjusted using the HMI interface by controlling the movement of the solenoid connected to the hydraulic system. The system is also equipped with an audible alert (buzzer) when starting operation. It is recommended that the system be further developed by adding an automatic sensor capable of adjusting the angle according to the thickness of the material being used.

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