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TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Published by Universitas Muhammadiyah Cileungsi
ISSN : 20873336     EISSN : 27214729     DOI : https://doi.org/10.37373/tekno.v13i2
Core Subject :
Aim and Scope Aim The aim of this journal publication is to disseminate the fundamental ideas or ideas that have been accomplished and the study findings in technology, science and informatics. In terms of community sector study outcomes, the Journal of Technoscience primarily reports on the main issues. Scope Science issues Scopes related to this topic include: Agriculture, Climate, Mathematics & Statistics, Applied Physics, Fundamental Science in Engineering, Bioscience & Biotechnology. Engineering and Technology issues Scopes related to this topic include: Mechanical & Structures, Electrical, Communications & Systems, Fuel and Energy, Material, Termal Management, Safety System and Technology, Maintenance Technology, Automotive . Information and Technology issues Scopes related to this topic include: Artificial Intelligence, Computer Science, E-learning & Curriculum, Information Science, Multimedia, Science Technologies, Information Networks, Internet & Mobile Computing, Machine Learning, Information Science.
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Articles 222 Documents
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Performance analysis of stationary wavelet transform with various thresholding functions for electrocardiogram signal denoising Indra Hermawan; Maria Agustin
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1488

Abstract

Electrocardiogram (ECG) signals play a vital role in cardiac diagnostics but are highly susceptible to interference from Baseline Wander (BW), Powerline Interference (PLI), Electrode Motion (EM), and Muscle Artifact (MA), which may degrade diagnostic accuracy and increase false alarm rates in healthcare monitoring systems. The Stationary Wavelet Transform (SWT) is known to be effective in ECG denoising; however, its performance is significantly influenced by the choice of thresholding function. This study aims to comprehensively evaluate five thresholding functions (Soft, Hard, Semi Soft, Garrotte, and Stein) when integrated with SWT across various noise types and levels. The performance is assessed using three primary metrics: Root Mean Square Error (RMSE), Percentage Root Difference (PRD), and Signal-to-Noise Ratio (SNR) Improvement. Experimental results indicate that the Stein method delivers the highest signal quality improvement with an average SNR gain of 5.4 dB, while the Semi Soft method achieves the lowest error rates, reducing RMSE by up to 28% under low to medium noise conditions. Under high noise levels, all methods show similar degradation in performance. This study addresses a gap in the literature by providing a novel comparative analysis of thresholding strategies for ECG denoising using SWT. The findings serve as a valuable guide for optimizing noise removal in real-time ECG monitoring systems
The effect of concentrator reflector design on the energy conversion efficiency of bifacial solar cells Wahyu Rizkika; Marza Ihsan Marzuki; Soni Prayogi
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 13 No 1 (2026): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v13i1.1514

Abstract

Bifacial solar cells can absorb light from both sides, front and back, so they can take advantage of light reflection from surrounding surfaces to improve energy efficiency. The main objective of this study is to optimize the design of a reflection concentrator that can maximize the amount of light received by the back surface of the bifacial solar cell, which is often less exposed than the front surface. The methodology used includes simulations and practical experiments. Simulations were carried out to determine the optimal angle and shape of the reflection concentrator, using photovoltaic modeling software. Practical experiments involved the construction of a reflection concentrator prototype and testing its performance under varying environmental conditions. The results showed that the use of a reflection concentrator can increase the total efficiency of bifacial solar cells by up to 20% compared to a system without a concentrator. In addition, optimal design also considers factors such as the reflective material used, the tilt angle, and the geographical conditions of the solar cell installation. These performance improvements show great potential in practical applications, especially in installations in urban areas and locations with limited space where maximum utilization of each side of the solar panel is essential.
Reduction of changeover time and solvent cleaning cost in tank cleaning process in paint manufacturing industry in Indonesia Krisna Budi Juliantoro; Hibarkah Kurnia; Syarah Rizkia Feriaty
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1520

Abstract

In the era of globalization, competition in the manufacturing industry is increasing, especially regarding product quality and customer service. One of the paint manufacturing companies in Indonesia has experienced an increase in production volume in line with increasing market demand, as reflected in annual sales growth of 25-29%. As a market leader in the field of marine coatings and protective coatings with a market share of more than 29%. These challenges impact the tank cleaning process, which directly affects the duration of change over time with each product changeover. Based on company standards, the ideal changeover time is 30 minutes for each product changeover during tank cleaning. This research aims to reduce the duration of changes over time and reduce wasted costs in purchasing cleaning solvents (solvents) needed in the tank cleaning process at each batch change. The method of this research is a combination of A3 Problem Solving and Single-Minute Exchange of Dies (SMED), which is designed to compile documentation solutions in a consistent, clear, and structured manner. Research findings reveal that the duration of the initial change required reaches 95 minutes with a monthly solvent purchase cost of IDR 10,500,000. By converting several internal activities into external activities, the duration of the change to be completed was reduced to 30 minutes, and the completion cost was IDR 3,500,000 per month. Overall, this research shows an over-time change efficiency of 68% and operational cost savings of up to 66% in the tank cleaning process.
A completely randomized experimental design with 3 factors on tempe resistance Afifah Dilla Indrawati Haryono; Atika Nurani Ambarwati
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1539

Abstract

Tempe produced in Indonesia generally uses soybeans fermented with microorganisms as the main raw material. This fermented food is liked by many people from various levels of society because of its taste and protein and carbohydrate content. However, tempe can only last for 1-2 days. The average per capita consumption of tempe per week in 2023 increased by 0.143 kg from the previous year. The Central Statistics Agency revealed that the supply of around 335 thousand tons of local soybeans from 2.7 million tons of national soybean needs. The need for soybeans for tempe reaches 70% of the total national need, further strengthening the fact that the amount of local soybeans is decreasing so that the country must import to meet the supply of soybean needs. In the city of Semarang, tempe is made from imported soybeans. Course, other types of local beans are substitutes. The demand for tempe production continues to increase, but some producers have not been able to maintain the quality and durability of tempe. The 3-factor design helps to determine the treatment factors that affect the durability of tempe. Based on the experiment, the durability of tempe was influenced by factors of beans, inoculum, fermentation, bean-inoculum interaction, beans-fermentation, and beans-inoculum-fermentation. Cowpea tempe with yeast inoculum fermented for 24 hours had the best durability
System design for turbidity control in aquaponic ponds Aditya Aprilianto; Weny Indah Kusumawati; Harianto; Heri Pratikno
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1547

Abstract

Aquaculture is fish farming, and hydroponics is the cultivation of plants/vegetables without soil, which means utilizing water and growing media. Aquaponic systems are a combination of fish farming (aquaculture) and soil-less plant/vegetable farming (hydroponics), creating a mutually beneficial relationship. This research aims to design and implement an automated system capable of monitoring and controlling the water turbidity level in aquaponic ponds using the SEN0189 sensor integrated with the Internet of Things (IoT) platform. The developed system utilizes a turbidity sensor, float switch, NodeMCU ESP8266 microcontroller, and connection to the Firebase cloud to enable real-time remote monitoring. The control logic in the system is designed to be able to take automatic water draining and filling actions based on the detected turbidity level parameters. Tests were conducted 98 times, showing a sensor success rate of 92% with 8% non-conforming readings due to program logic mismatches. The tests also revealed the significant influence of environmental lighting, where sensor results at night showed higher values despite clear water conditions. In addition, the system successfully avoided overlapping processes between draining and filling, with an operational success rate of 100% in the overall device test. The results show that the system is effective and reliable for maintaining water quality in aquaponic systems, as well as providing users with the convenience of remotely monitoring and managing water conditions through an IoT connection. This system can be an efficient alternative solution to support the success of fish and plant farming in household and commercial scale aquaponics.
Management of ABC Project through Performance Measurement and Strategy Improvement Determination Yudha Adi Kusuma; Luqman Ardyansah; Dicy Septian Avandy
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1554

Abstract

The success of a project is influenced by effective performance management and the accuracy of improvement strategies. This study aims to measure the performance of the ABC project and determine optimal strategies to enhance efficiency. Performance evaluation is conducted using the performance prism method, which assesses five key aspects: stakeholder satisfaction, stakeholder contribution, strategy, processes, and capabilities. Additionally, the Critical Success Factor (CSF) method is employed to identify the primary factors affecting project success. SWOT analysis is applied to formulate improvement strategies aligned with the project's conditions. Data collection is carried out through surveys, interviews, and in-depth analysis of the project conditions. The results indicate that the process aspect holds the highest weight in the execution of the ABC project, while the final inspection activity is the dominant factor in determining its success. Based on the analysis, 12 improvement strategies have been identified to enhance efficiency and mitigate project delays. These strategies include process optimisation, technology implementation, and improved stakeholder coordination. The findings of this study are expected to contribute to project management in optimising performance, enhancing resource management effectiveness, and supporting more efficient and competitive project execution.
Examining mobile learning adoption: The role of ease of use, usefulness, and intention Sulistiowati Sulistiowati
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1562

Abstract

The proliferation of mobile-based learning apps on the Google Play Store has been facilitated by the advancement of information technology. However, the level of optimal use is still a challenge with several problems related to: 1) Perceived Ease of Use (PEU), 2) Perceived Usefulness (PU), 3) Behavioral Intention (BI), 4) Use Behavior (UB). Therefore, this study aims to analyze the factors that influence the acceptance (UB) of mobile-based learning applications using the Technology Acceptance Model (TAM). This model uses the variables PEU, PU, ​​BI, and UB. Data were collected through an online questionnaire with 107 respondents and analyzed using SEM-PLS. The results showed that PEU had a significant effect on PU (62.8%), but did not directly affect BI and UB. PU had a significant effect on BI (50.3%) and did not directly affect UB. While BI had a significant effect on UB (44.9%). This finding confirms that ease of use of an application (PEU) must go through usefulness (PU) to be able to influence user intention (BI), then BI influences UB or in other words BI mediation plays a very important role in bridging the influence of initial perceptions on actual use. The implications of this study can help developers of mobile-based learning applications to increase user engagement so that the application can be accepted and used by users.
Implementation of the Six Sigma-DMAIC Method in Improving Quality Product Scanning Units in the Electronics Industry Dimas Azib Saputra; Hibarkah Kurnia; Syarah Rizkia Feriaty
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1579

Abstract

The current era of globalization demands that all sectors of the manufacturing industry can improve the quality of service to customers. The electronics industry sector in Indonesia still has several defective products received by distributors. One electronic product that still has defects in the product is the scanner unit product. This research aims to identify defects that occur in the scanner unit assembly process and improve product quality by controlling the process. This research method uses the Six Sigma method at the Define, Measure, Analyze, Improve, Control (DMAIC) stages. This research has found that there are dominant foreign material defects of 221 pcs (35.42%) of the total defects of 624 pcs from January to February 2024. The causal factor is that the man consisting of WI (Work Instruction) is not carried out properly and the operator is not careful. at the checkpoint, the method consists of installing the glass label in the glass box, there is no process of checking the glass box before reuse, the material consists of burrs on the lower housing material, the presence of dust and stains on the carriage cis components, and the machine consists of the vacuum device does not inhale optimally, and the air pressure in the blowing machine is not optimal. The results of this research show an improvement in total defects from 624 pcs in Jan - Feb 2024 to 229 pcs and in April - May 2024, with a percentage of 1.662% decreasing to 0.571%. Meanwhile, the sigma level percentage results increased by 0.33 from 4.39 to 4.72 sigma level.
Anthropometric chair design using the reverse engineering method to support practical learning Haryo Sutedi; Nensi Yuselin; Neilinda Novita Aisa; Edwar Rosyidi; Rifdah Zahabiyah; Yuliani Fauziah; Indra Setiawan; Agusti Alvi Farhan; Ghiyas Ijaz Muffazal; Jason Bagasputra Setyawan; Muhammad Irham Amirul Hakim; Arif Mursyid; Erlangga Satria; Muhammad Padillah; Sofyan Effendi
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1580

Abstract

Accurate measurements are essential to ensure tool alignment, machine precision, and measurement results. Currently, there is a difference in the height of students at the Astra Polytechnic, therefore an anthropometric chair is needed to facilitate the measurement of body dimensions. Anthropometric chairs are specialized tools for measuring body dimensions, but there are often some problems in their use. To overcome this problem, improvements are made through the Reverse Engineering method which aims to reproduce or recreate an existing model without using the original design documents. The main goal of this study is to improve the efficiency and accuracy of measuring students' body dimensions. These modified anthropometric chairs are expected to be easier to use, with an easily adjustable height and a simple disassembly and assembly process. The improved results show that the new design of the anthropometric chair is more efficient and improves the accuracy of measurement results, as well as providing more reliable data for a variety of purposes, such as product design and ergonomic studies.
Workload analysis using full time equivalent method for production operators at PT Pertamina EP Tambun Field Heru Santosa; Siti Rahayu; Dodit Ardiatma
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 12 No 2 (2025): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v12i2.1588

Abstract

Workload is a major challenge in human resource management, especially in modern industrial environments. Workload imbalance between production operators can have a negative impact on productivity, operational efficiency, and employee welfare. This study aims to analyze the workload of operators using the Full Time Equivalent (FTE) method as an accurate approach. The results of the analysis show that all operators at the gathering station workstation experience excessive workload conditions, with FTE values ​​ranging from 1.285 to 1.389. In contrast, operators at the gas station and well and pipeline station show FTE values ​​within normal limits, namely between 1.013 and 1.028. This imbalance also affects the work performance of operators, especially at the gathering station, which shows a lower average performance value compared to other stations. As a solution, a recalculation of the workload was carried out after adding one operator each to each gathering station unit. The results showed that the FTE value was within the normal range, indicating an improvement in work distribution and the potential for increasing employee performance.

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