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JOURNAL OF SCIENCE AND APPLIED ENGINEERING
Published by Universitas Widyagama
ISSN : 26213753     EISSN : 26213745     DOI : -
Core Subject : Science, Education, Social, Engineering,
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Social Sciences Other
ournal of Science and Applied Engineering (JSAE) is an open access peer-review journal, and is aimed to disseminate original research in all fields of Electrical Engineering, Mechanical Engineering, Civil Engineering, Industrial Engineering and Informatics Engineering and presents the latest development and achievements in scientific research in Indonesia and overseas to the world’s community. Only original, innovative and novel papers will be considered for publication in the JSAE. The authors are required to confirm that their paper has not been submitted to any other journal in English or any other language. The JSAE welcome contributions from all who wishes to report on new developments and latest findings in science and applied engineering.
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Articles 81 Documents
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Analysis of The Influence of Additional Percentage of Catalyst on The Electrolysis Process on Hydrogen Volume and Flame Profile Mohammad Julio Akbar; Gatot Soebiyakto; Akhmad Farid; Dadang Hermawan
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4976

Abstract

Utilization of new and renewable energy is an important point for Indonesia for development, science and technology. On the other hand, the use of fossil fuels is very limited so the alternative fuel solutions are vegetable oil (BBN) and methane gas and others, even in the future the substitute for these fuels will use electricity. The material used in this research is stainless steel. The independent variable tested was the catalyst percentage of NaCl, NaOH and NaHCO3 of 40%. The dependent variables are the volume of hydrogen and flame characteristics. The control variable uses a voltage of 12 volts using water and distilled water as solvents with a volume of 1000 ml. The data collection procedure starts with 12 Volt DC current energy which will produce electrical energy from the cathode pole and anode pole. The electrolysis process will occur causing the catalyst and solution to undergo a chemical process, namely the separation/decomposition of H2O, the catalyst and solution producing hydrogen bubbles which are stored in a tube. The data is then analyzed empirically and using Image-J software or similar to determine the characteristics of the flame. The analysis of the experimental data above can be compared with previous research, namely producing the highest volume of hydrogen at a percentage of 16% of 367 mL and the lowest volume of hydrogen at a percentage of 8% of 198 mL. The highest flame temperature at a percentage of 16% is 54.7 C and the lowest temperature at a percentage of 8% is 31.7C with the highest flame height at a percentage of 16% being 5.72cm and a flame width of 2.98cm and the flame brightness level (Red Green Blue) is highest at a catalyst percentage of 16% at 16 RGB and the flame brightness level (Red Green Blue) is lowest at a percentage of 8% at 2 RGB.
Electrolysis Process of Acid Acetic and Sugar Water Solution as an Alternative Fuel Gatot Soebiyakto; Sutrisno Sutrisno; Dadang Hermawan; Muhammad Ghazali Arrahim
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.5000

Abstract

One alternative energy that can be developed is hydrogen. To obtain hydrogen gas by decomposing water compounds (H2O) into hydrogen hydrogen oxygen gas (HHO) through electrolysis. The solution used in this electrolysis process uses sodium chloride (NaCl) with electric current energy. In this research, a dry cell type HHO generator was used, the electrode used was a type 304 stainless steel plate with a catalyst percentage (NaCl) of 8%, 10%, 12%, 14% and 16%. The aim of this research is to determine the hydrogen content in a solution of vinegar and sugar water which can be used as an alternative fuel. This research produced the highest hydrogen volume at a percentage of 16% of 367 mL at the highest temperature of 547 C, the lowest 317 C and the lowest hydrogen volume of 198 mL. The highest flame height is 5.72 cm and flame width is 2.98 cm and the highest flame brightness level (Red Green Blue) is 16 RGB and the lowest brightness level is 2 RGB.
Business Process Improvement for Reducing Delay in the Material Document Issue Process in the Fertiliser Manufacturing Industry Anastasia Lidya Maukar; Jhindan Iqbal Fiasta
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4798

Abstract

The business process will be carried out by the fertiliser company. Currently, process delays are a problem for one of the departments in this company. The delay contributor is an unsatisfied 3.5% gap rate in the material document issue process key performance indicator (KPI). This will disrupt the process flow and can have a domino effect on end-users. Business process improvement (BPI) is one of the most powerful and effective methods to use for improving the business process and business process modeling notation (BPMN) provides a notation that is simple to understand for analysis of the business process. The result of the BPI tool is the design of a new business system with improved processes modeled using Bizagi Modeler, because several processes are still handled manually. So, the processing time is long and needs to be evaluated. Some of the activities will be elimination, upgrading, and simplification. The percentage increase in the total time of the proposed business process is 7% in the KPI. The process time decrease in the total time of the proposed business process is 10.90 days. Further research should be conducted to reduce delays in the material document issue process for the next levels, such as resource analysis and calendar analysis, it will be able to figure out what method is more appropriate for business process improvement in the material document issue.
The Effect of Additional Vermiculite on Compressive and Flexural Strength of Concrete Syahril Syahril; Mujiman Mujiman; Desutama Prayogo; Muhammad Raihan Riandi; Lintang Dian Artanti; Ambrosio Martins Nuno
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4914

Abstract

Concrete is one of the building materials that is used the most. The majority of the volume of concrete is made up of aggregates, which have a significant impact on the characteristics, mix proportions, and economics of concrete. The space created by the absence of fine aggregate can be filled with vermiculite. Vermiculite is a rich mineral that is widely recognized for its exfoliating properties and for expanding quickly when heated. Vermiculite typically has a temperature resistance of up to 1200°C. It is a system of low-density, non-structural building products. In addition to being lighter in weight and odorless, vermiculite offers increased workability, improved fire resistance, and improved resistance to cracking and shrinking also reduce cost of construction. In this research, vermiculite is employed at varying concentrations of 12%, 24%, and 36%. Vermiculite samples from PT.IPI Sunijaya, cement with the Dynamix brand, fine aggregate from the Galunggung area, and coarse aggregate from Cimalaka. The design of this research followed ACI 1991, with a design quality of 15 MPa. The maximum variant on compressive strength and flextural strength of concrete is using 36% of vermiculite because vermiculite has a high capacity for water absorption, adding it to concrete boosts both the compressive strength and flexural strength of the material. Vermiculite will therefore absorb excess water in the mixture and dry out the mortar while keeping the completed product's firmness owing to the granules. This is why it is added to and blended with concrete. Vermiculite particles can be used to patch cracks and holes in concrete.
Study of Characteristic of Used Tire, Asphalt, and RHDPE Powder Composites as Car Fender Material Anwar Nurharyanto; Wachid Yahya
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5233

Abstract

This research aims to determine the effect of composition on used tire powder composites, asphalt, and recycled plastic (rHDPE), on tensile stress. The composite is expected Can be used for fenders on cars. The composition variations in this study were 500 grams of used tire powder, and 100 grams of asphalt, with variations of rHDPE 20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 200, 250, 300, 350, 400 grams. From the tensile test results, the lowest tensile stress was obtained 0.0233 N/mm2 is owned by a composite with a composition of 40-gram rHDPE. For tensile stress. The highest was a composite with a composition of 400-gram rHDPE with a tensile stress value of 0.855 N/ mm2. The tensile test results of factory-made car fenders have a tensile stress of 0.852 N/mm2. From this research, it can be concluded that composites with composition High rHDPE can be used for fenders.
Effect of Internal Reflectors on Daily Performance of Double Slope Solar Stills with Porous Fin Absorber Plate Nova Risdiyanto Ismail; Purbo Suwandono; Dadang Hermawan; Akhmad Farid; Frida Dwi Anggraeni
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5981

Abstract

The potential of energy and sea water in Indonesia is relatively high, but it has not been utilized massively to reduce the shortage of fresh water on the islands. Utilization of this potential can use solar stills. Solar still is a relatively cheap technology, easy to obtain materials, environmentally friendly and easy to construct, but this technology has shortcomings in its low productivity. Efforts to increase productivity have been made by many researchers, but there has not been a study of internal reflector integration in a double slope solar still using a porous absorbent plate tested for 23 hours. This study aims to examine the effect of adding an internal reflector on the performance of a double slope solar still. The performance of the double slope solar still is identified by evaluating freshwater productivity and efficiency. This research was conducted experimentally comparing with and without internal reflector. The addition of internal reflectors varies in placement, as for the placement on the north and south sides (RUS), the south side (RS), and the north side (RU). Data collection starts at 07.00 p.m. until 06.00 a.m the next day and is carried out for 5 days. Research comparing the performance of RUS, RS, RU compared to TR and concluded that there is an increase in temperature of fins, seawater and cover glass when using the addition of internal reflector. The increase in temperature has an effect on daily productivity for RUS, RS and RU between 12.88-16.13%, 8.71-12.56%, and 1.70-2.88%, respectively. In addition, the addition of the internal reflector has a positive effect on increasing the daily efficiency for RUS, RS and RU between 12.69-15.93%, 8.60-12.46% and 1.65-2.82%, respectively.
Analysis of the Percentage of Corn Cob Bioethanol Volume with 92 Octane Fuel in Gasoline Engines Yuniarto Agus Winoko; Supa Kusuma Aji; Agus Setiawan; Intan Fadillah
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5466

Abstract

One way to improve the performance of gasoline engines is by using bioethanol, which can enhance combustion efficiency. Bioethanol, a renewable fuel derived from the fermentation of plant materials, can be blended with traditional fossil fuels to create a more efficient and environmentally friendly fuel alternative. The combination of fossil fuel and fermentation-derived fuel has a significant impact on the overall performance and emissions of the engine. The aim of this study is to determine the magnitude of changes in torque and power when a gasoline engine is fueled with a mixture of corn cob bioethanol and pertamax. Additionally, specific fuel consumption will be determined to evaluate the fuel efficiency. The engine used in this study is a 150cc gasoline motor, a common size for motorcycles and small vehicles. The testing variables include engine speed variations from 2000 to 9500 rpm using bioethanol blends of 5%, 10%, and 15% with 92 octane fuel. The data collected from these tests is calculated mathematically. The results of the study show the largest increase in power at 0.45 horsepower at 2500 rpm and torque at 2.82 Nm at 2500 rpm when using the BE15% fuel blend, indicating a notable enhancement in engine performance with higher bioethanol content. Furthermore, the smallest decrease in fuel consumption was recorded at 0.1739 kg per horsepower, highlighting the efficiency benefits of bioethanol blends. Overall, the engine performance improves when using a blend of 92 octane fuel with bioethanol compared to pure 92 octane fuel. This suggests that incorporating bioethanol into gasoline can not only improve power and torque but also enhance fuel efficiency, making it a viable option for reducing dependency on fossil fuels and lowering emissions.
Comparison of Pine Seed Quality Classification Using the Naive Bayes and KNN Methods Widiya Nur Permata; Istiadi Istiadi; Rangga Pahlevi Putra
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5090

Abstract

Pine seeds are the seeds of pine trees, which are a type of open-seeded plant known as gymnosperms. Gymnosperm plants have seeds that are not protected by fruit, unlike flowering plants (angiosperms). Pine seeds are typically found inside hard cones. Pine seeds possess several distinctive characteristics, including their small, flat shape and are often equipped with thin wings that aid in their dispersal when released. The process of selecting pine seeds for planting must adhere to established standards of seed quality to enhance desired attributes such as color, texture, and shape in seedlings. Suitable pine seeds for use in planting or propagation are those in a new condition. Quality pine seeds cannot be distinguished by visual inspection alone; alternative tools are required. Given the challenge of differentiating seeds suitable for primary propagation, the researcher proposes a comparison of Pine seed classification using two different methods: the Naïve Bayes Method and K-Nearest Neighbors (KNN). This is expected to enable the accurate detection of pine seeds. The feature extraction method used is the Gray-Level Co-occurrence Matrix (GLCM). The dataset used consists of 165 pine seed samples, comprising 55 images of fresh pine seeds, 55 images of dry pine seeds, and 55 images of decayed pine seeds. Between the two methods, K-NN exhibits the highest percentage value compared to the Naïve Bayes method in the k-fold cross-validation, achieving an accuracy of 95%.
Numerical Study of Chord Length and Twist angle Effect towards NACA 4415-FX60 Airfoil Combination in Horizontal Wind Turbines Application Hangga Wicaksono; Kris Witono; Akhmad Faizin; Budi Eko Prasetyo
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5868

Abstract

The selection of the appropriate blade shape requires optimization in order to be applied to the relatively low wind conditions in Indonesia. This study proposed a new approach of wind turbine blades design by utilizing the combination of NACA 4415 and FX 60. The effect of twist angle and the chord length carried out in this study to better understanding the blades characteristics. The 6 DoF analysis can be used to determines the theoretical mechanical power of the wind turbine blades. The blade twist geometry analyzed in this study is 15, 20, and 25 degree. From the simulation results, the highest mechanical power was obtained on blades with a twist angle of 5 degrees and a chord length of 0.15m with an average value of 39.95 W. The simulation results show that, at a speed of 8 m/s the blade with a chord length of 0.2 m and a twist angle of 5o has the greatest torque of 5.16579 Nm, with a rotational speed of 76.0668 rpm per minute, this combination can be applied to a low rpm generator A twist angle can improve torque distribution along the blade, but a twist angle that is too sharp can reduce lift and increase drag. It was found that a wider chord length tends to produce lower rotation in the wind turbine. This is caused by the increased surface area on the turbine blade with a longer chord length, which results in an increase in the torque required to rotate the blade at a given speed.
Content Commodification in the Digital Age : Implications and Challenges Erri Kartika Purnama Putri; Zulaikha Zulaikha; Dhimam Abror; Nur Annafi Farni Syam Maella
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.6119

Abstract

This research aims to explore the phenomenon of content commodification in the digital age, focusing on the economic, social, and cultural implications and challenges faced by content creators and digital platforms. Offers an original contribution to understanding how content commodification impacts various aspects of digital life. By highlighting key implications and challenges, it provides useful insights for content creators, platform managers, and policymakers. A qualitative approach was used in this research, involving in-depth interviews with content creators and policy analysis of digital platforms. Data was also obtained through a review of current literature from the last five years to support the research findings. Research limitations include limitations in sample size and diversity, time constraints, and participant and researcher bias. These limitations affect the generalizability of the results and highlight the need for further research with a wider scope and more diverse methods. The results show that content commodification provides significant economic opportunities for content creators, but also brings challenges such as income instability, copyright issues, and pressure to create viral content. Digital platform algorithms affect the visibility and sustainability of content. Social and cultural implications include changes in consumption patterns and social interactions, as well as cultural diversification influenced by platform algorithms. This research concludes that overcoming the challenges of content commodification requires diversifying sources of income, increasing copyright awareness, and developing fairer algorithms. Cooperation between creators, digital platforms, and policy makers is essential to create a more equitable and sustainable ecosystem in the creative industry and digital economy.

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