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Jurnal Teknologi
Published by Politeknik Negeri Lhokseumawe
ISSN : 14121476     EISSN : 25500961     DOI : http://doi.org/10.30811/teknologi
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
Jurnal Teknologi is a peer-reviewed journal that aims at the publication and dissemination of original research articles on the latest developments in all fields of technology and engineering sciences. The journal publishes original papers in Indonesian and English, which contribute to the understanding of engineering science and the improvement of engineering technology. Papers may be theoretical, experimental, or both, and applied engineering science and technology. The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere. The scope of Jurnal Teknologi includes a wide spectrum of technology and engineering science subjects including: Civil engineering; Mechanical engineering; Chemical engineering Electrical engineering; Information and technology; Computer science and engineering; Materials science and engineering; Renewable energy engineering;
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 191 Documents
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Effect of Composition Variation and Mesh Size on the Characteristics of Acehnese Noodle Seasoning Powder Produced by Oven-Blower Drying Asma Zuhra; Teuku Rihayat; Cut Aja Rahmahwati
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9295

Abstract

Aceh is widely known for its traditional cuisine rich in spices, including Acehnese noodle seasoning. However, conventional wet seasoning has limited shelf life and low practicality. This study aimed to determine the effect of spice composition and mesh size on the characteristics of powdered Aceh noodle seasoning produced using a drying oven blower. Drying was carried out at 70°C for 3 hours. The experimental design used five formulation variations (F1-F5) and five mesh sizes (60, 70, 80, 90, and 100 mesh). Parameters analyzed included moisture content, acid insoluble ash content, fat content, and organoleptic properties. The results showed that finer mesh size reduced moisture and ash content while increasing fat content due to the larger surface area of smaller particles. The lowest moisture content was obtained in F5 at 100 mesh with 6.8%, while the highest fat content was found in F2 at 100 mesh with 18.02%. All samples met the SNI 01-3709-1995 quality standard for spice powder products. Organoleptic evaluation indicated that F5 at 100 mesh was the most preferred formulation in terms of aroma, color, and taste. The study demonstrates that formulation composition and particle size significantly influence the physicochemical and sensory characteristics of Acehnese powdered seasoning.
Evaluasi Kinerja Waktu dan Biaya Pada Proyek Penanganan Longsoran Ruas Jalan Kema-Rumbia Dengan Menggunakan Metode Earned Value Alfian Mokodenseho; Geertje Efraty Kandiyoh; Nixon Servius Mantiri
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9856

Abstract

Road infrastructure projects require effective control of cost and schedule performance to ensure completion according to the established plan. This study aims to evaluate the cost and schedule performance of the Kema–Rumbia Road Landslide Mitigation Project using the Earned Value Management (EVM) method and to estimate the cost and completion time of the project. Project data from Week 1 to Week 37 were analyzed, with detailed evaluation conducted at Week 18 and Week 35. The parameters analyzed include Planned Value (PV), Earned Value (EV), Actual Cost (AC), Cost Variance (CV), Schedule Variance (SV), Cost Performance Index (CPI), Schedule Performance Index (SPI), Estimate to Complete (ETC), Estimate at Completion (EAC), and Schedule Estimate at Completion (S-EAC). The results show that at Week 18, the project experienced cost inefficiency and schedule delay, indicated by a CPI of 0.79 and SPI of 0.92. At Week 35, cost performance improved, with a positive CV of Rp328,398,417.87 and CPI of 1.07, while schedule performance remained behind plan with an SPI of 0.93. At Week 18, the estimated completion time was 250 days compared with the planned 240 days, while actual project completion reached approximately 254 days. The EAC decreased from Rp6,728,615,463.56 at Week 18 to Rp4,961,419,150.13 at Week 35. These findings indicate that improved cost efficiency did not eliminate schedule delays.
Algoritma Anti-Bias Pasca-Prediksi pada Sistem Pengenalan Makanan Khas Yogyakarta Berbasis ESP32-CAM Agus Siswoyo; Johannes Leon
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9191

Abstract

Automatic recognition of regional food specialties using embedded devices still faces challenges, particularly prediction imbalance (bias) due to the very small dataset size. This study developed a recognition system for eight types of Yogyakarta specialties (gudeg, sate klatak, bakpia, jogja tahu, pecel gudeg, ayam geprek, es dawet, and klepon) based on ESP32‑CAM integrated with a Flask server and a TensorFlow model (MobileNetV2). The training dataset consisted of only 51 images (average 6–7 images per class). The main problem encountered was extreme bias: the initial model predicted the "klepon" class in 85% of the tests. To address this, a post-prediction anti-bias algorithm was proposed that combined multiple randomization techniques, HSV-based color feature analysis, and weighted probability distributions. Tests were conducted on 15 scenarios with varying lighting and shooting angles. The results show that the anti-bias algorithm successfully reduced the dominance of klepon predictions from 85% to 15%, and achieved a more balanced distribution of predictions between classes. The system's average response time was 1.2 seconds with a 94% success rate for ESP32-server communication. The recognition accuracy under optimal conditions reached 78% (72% average). This system demonstrates that a hybrid edge-cloud approach with a post-prediction anti-bias algorithm can be an effective solution for object recognition on very small datasets, especially for IoT-based culinary applications.
Pengaruh Serat Mikro-Selulosa Bambu dan Cocopeat terhadap Karakteristik Mortar Pozzolan dengan Agregat Daur Ulang Bata Merah Minahasa Syulitary Naomi Ester Pangalila; Warda Anisa Putri; Steve Supit; Fery Sondakh; Cyntha Tendean
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9709

Abstract

The utilization of natural fibers and recycled materials in cement-based composites has gained increasing attention as a sustainable approach to improving material performance while reducing environmental impacts. This study aimed to investigate the effects of bamboo micro-cellulose, cocopeat micro-cellulose, and recycled red brick aggregate on the characteristics of pozzolanic mortar. Mortar specimens were prepared using Portland Composite Cement (PCC), fly ash, lime, metakaolin, superplasticizer, bamboo micro-cellulose, cocopeat micro-cellulose, and recycled red brick aggregate. Compressive strength, flexural strength, and porosity tests were conducted at curing ages of 7 and 28 days. The results showed that the compressive strength increased with curing age, reaching a maximum value of 20.1 MPa at 28 days. The highest flexural strength (6.3 MPa) was achieved by the pozzolanic mortar containing 1.5% bamboo micro-cellulose without recycled aggregate, whereas the incorporation of recycled red brick aggregate tended to reduce flexural strength due to its higher water absorption and the lower quality of the Interfacial Transition Zone (ITZ). In addition, all mortar mixtures exhibited lower porosity at 28 days than at 7 days, indicating the formation of a denser cementitious matrix through hydration and pozzolanic reactions. Overall, the combination of pozzolanic materials, micro-cellulose, and recycled red brick aggregate demonstrates potential as an environmentally friendly alternative mortar through the utilization of biomass and construction wastes while maintaining satisfactory mechanical and physical properties.
Pengaruh Musim terhadap Kualitas Air Baku, Efisiensi Pengolahan, dan Carbon Footprint pada Water Treatment Plant PT. XYZ Taufiq - Taufiq; Satriananda Satriananda; Nanang Rahmat Wijaya
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9390

Abstract

Water Treatment Plants (WTP) play an important role in supplying clean water for industrial utility and process requirements. This study aimed to analyze the effect of seasonal changes on raw water quality, evaluate Total Suspended Solid (TSS) removal efficiency, and calculate the operational carbon footprint of the Central Water Treatment Plant at PT. XYZ. The study was conducted through field observation, water quality analysis, evaluation of chemical consumption, and emission calculations based on the Greenhouse Gas Protocol. The results showed that during the dry season, the parameters of color, turbidity, and TSS increased, resulting in higher coagulant and flocculant consumption compared to the rainy season. The Water Treatment Plant demonstrated good treatment performance with a TSS removal efficiency of 97.2% and an average TSS removal of 848.49 tons/month. Carbon footprint analysis indicated total emissions of 20.22 tons CO2-eq, with the largest contribution originating from electricity consumption in scope 2 emissions at 52.27%. The study indicates that raw water quality affects energy consumption, chemical usage, and operational carbon emissions of the Water Treatment Plant. Optimization of energy and chemical consumption is required to improve operational efficiency and reduce carbon emissions.
Dampak Tsunami dan Kenaikan Muka Air Laut terhadap Kawasan Pesisir Kota Lhokseumawe Tursina Tursina; Muhammad Reza; Rizal Syahyadi; Ibrahim Ibrahim; Abdullah Irwansyah; Mirza Fahmi
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9864

Abstract

Sea level rise (SLR) is one of the most significant impacts of climate change, increasing the vulnerability of coastal regions to natural hazards, including tsunamis. Lhokseumawe City, Aceh Province, Indonesia, is a strategic coastal area characterized by ports, energy facilities, and densely populated settlements, making it highly susceptible to the combined effects of tsunami events and rising sea levels. SLR increases nearshore water depth, allowing tsunami waves to propagate farther inland, expand inundation areas, and reduce wave arrival times, thereby increasing potential risks to communities and critical infrastructure. This study investigates the impact of sea level rise on tsunami inundation characteristics in Lhokseumawe City using the Cornell Multi-grid Coupled Tsunami Model (COMCOT). A tsunami source was generated based on a Mw 9.2 megathrust earthquake scenario in the Sumatra–Andaman subduction zone. Simulations were conducted using bathymetric data from DEMNAS, topographic data from BATNAS, and sea level rise scenarios of 1.0 m and 2.0 m. The analysis focused on changes in tsunami wave propagation, arrival time, and inundation extent. The simulation results reveal that sea level rise significantly increases tsunami inundation areas, particularly in the Pusong area of Banda Sakti District. In addition, SLR reduces tsunami arrival time along the Lhokseumawe coast from approximately 80 minutes to 70 minutes, thereby decreasing the available evacuation time. These findings emphasize the necessity of incorporating sea level rise scenarios into tsunami hazard assessments to support effective disaster risk reduction strategies and climate-resilient coastal planning.
Effect of Solid-to-Solvent Ratio and Maceration Time on Extraction Yield and Physicochemical Properties of Turmeric (Curcuma longa L.) Extract: Curcuminoid Characterization by HPLC Irman Ansari Adlin; Rusnia Junita Hakim; Untung Nugroho Harwanto; Wiwik Indrawati; Annisa Mayesti; Mela Rosiana Ariesti
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9063

Abstract

Curcuma longa L. is a major source of curcuminoids, bioactive compounds known for their antioxidant, anti-inflammatory, and antimicrobial activities. The efficiency of curcuminoid extraction is governed by key process parameters, particularly the solid-to-solvent ratio and extraction time. This study evaluated the effects of these parameters on extraction yield and physicochemical properties of turmeric extract, followed by curcuminoid characterization using high-performance liquid chromatography (HPLC). A factorial experimental design was employed using 96% ethanol as the extraction solvent. Maceration was performed at solid-to-solvent ratios of 1:7, 2:7, and 3:7 (w/v) for 24, 48, and 72 h. Extraction yield, pH, viscosity, and density were determined, while curcuminoid content was analyzed in the selected extract using HPLC. Data were analyzed using two-way ANOVA at a 95% confidence level. Both solid-to-solvent ratio and maceration time significantly affected extraction yield, pH, viscosity, and density (p 0.05). Significant interaction effects were observed for pH and viscosity, whereas no significant interaction effects were found for extraction yield and density (p 0.05). The highest extraction performance was obtained at a solid-to-solvent ratio of 3:7 (w/v) and a maceration time of 72 h, resulting in an extraction yield of 16.37%, pH of 7.01, viscosity of 148.00 cP, and density of 1.0497 g/mL. HPLC analysis revealed a dominant curcumin peak at a retention time of 5.11 min and a curcuminoid content of 17,964.24 mg/kg (1.80% w/w). These findings demonstrate that increasing the solid-to-solvent ratio and extending maceration time improve extraction performance and influence the physicochemical characteristics of turmeric extract. 
Karakteristik Aspal Berpori Menggunakan Asbuton LGA B50/30 Untuk Lapisan Perkerasan AC-WC Steren Delon Ruru; Steve W. M Supit; Greetje E. Kandiyoh
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9742

Abstract

Porous asphalt is an alternative pavement mixture designed to reduce surface water accumulation through interconnected air voids. However, increasing air voids generally decreases the mechanical performance of the mixture. This study evaluated the effect of adding Buton Natural Asphalt (Asbuton) LGA B50/30 on the characteristics of porous Asphalt Concrete-Wearing Course (AC-WC). An experimental laboratory method was employed using coarse and fine aggregates obtained from the Ex-Kema Quarry, North Minahasa, combined with 60/70 penetration asphalt and Asbuton LGA B50/30 as an additive at 5%, 6%, and 7% of the total mixture weight. Aggregate gradation was designed according to the Stone Matrix Asphalt (SMA) specification, while Marshall and constant-head permeability tests were conducted to evaluate the mixture performance. The aggregate gradation satisfied the specified limits and was suitable for porous asphalt production. Marshall test results indicated that all mixtures fulfilled the porous asphalt requirements. The highest stability was obtained at 6% Asbuton with a value of 796.19 kg, while the corresponding flow, Marshall Quotient (MQ), and Void in Mix (VIM) values were 3.48 mm, 229.30 kg/mm, and 19.23%, respectively. Increasing the Asbuton content reduced the VIM from 20.16% to 18.44% and decreased the permeability coefficient from 0.18 cm/s to 0.16 cm/s, although all mixtures remained within the specified permeability range. These findings indicate that Asbuton LGA B50/30 improves the mechanical characteristics of porous AC-WC while maintaining adequate drainage performance, with 6% Asbuton providing the most balanced overall performance.
Analysis of Coconut Oil Biodiesel Blends with Diesel Fuel and Citronella Oil Additive as an Alternative Fuel Khairunnissa Khairunnissa; Syafruddin Syafruddin; Elwina Elwina
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9476

Abstract

The increasing demand for diesel fuel and the environmental impact of the consumption of fossil fuels has encouraged the development of renewable alternative fuels. Coconut oil biodiesel is a promising alternative due to high cetane number, biodegradability and abundant availability but its application is limited due to relatively high viscosity. The present work aims to evaluate the effect of blending coconut oil biodiesel with diesel fuel and the addition of citronella oil (Cymbopogon nardus) as a natural bio-additive on the quality of the fuel. Citronella oil in concentration of 0 to 1.0% (v/v) was prepared in four biodiesel-diesel blends (B40, B50, B60 and B70). The fuel properties tested were density, kinematic viscosity, flash point, carbon residue, water content and cetane number according to ASTM and SNI standards . The results indicated that the fuel quality improved with increasing biodiesel content and citronella oil concentration. The cetane number and flash point increased steadily which indicated better ignition quality and improved fuel handling safety. Meanwhile, the density, viscosity, carbon residue and water content were within the permissible limits of fuel standards. The B70 blend with 1.0% citronella oil exhibited the best overall performance among all the formulations, with the maximum cetane number, flash point and satisfactory physicochemical properties. The results show that citronella oil is an efficient natural bio-additive to improve the quality of biodiesel-diesel blends from coconut oil. The proposed formulation has a good potential to be used as sustainable and environmentally friendly alternative diesel fuel supporting renewable energy utilization and energy diversification.
Optimasi Frekuensi dan Kuat Medan Elektromagnetik dalam Simulator Anti- Scaling CaCO3 Berbasis Induksi Elektromagnetik Nurcahyo Nurcahyo; Shoerya Shoelarta; Joko Suryadi; Akmal Rizky Asy-syawal Zaelani; Azmi Wibisono; Mufti Al Fath Munawar; Wondo Aris Nurwanto
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9845

Abstract

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Page 18 of 20 | Total Record : 191

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