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All Journal Jurnal Rekayasa Mesin International Journal of Applied Sciences and Smart Technologies JOSSAE (Journal of Sport Science and Education)
Silitonga, Dicky Januarizky
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Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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Analysis of Biomass Briquettes Made from Bagasse Using Tapioca Starch Adhesive with Drying Temperature Variations Alfian, Devia Gahana Cindi; Saputra, Khamid Y. W.; Muhyi, Abdul; Silitonga, Dicky Januarizky
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.4974

Abstract

Dependency on fossil fuels is making their availability increasingly scarce. Renewable energy is considered the best solution to replace fossil fuels, and at present, the primary focus should be on optimizing the utilization of renewable energy sources. As an example, biomass briquettes are being manufactured using bagasse and tapioca flour as adhesive in a 2:3 ratio. This study utilized a compression force of 50 kgf/cm2 and variations in drying temperatures (100 °C, 150 °C, and 200 °C) for 1 hour. The main objective of this research is to compare the quality of bagasse briquettes with the Indonesian National Standard (SNI) No. 01/6235/2000. The test results indicate that the best conditions were achieved at a drying temperature of 200 °C, with a moisture content of 4.47%, a calorific value of 5077.32 cal/g, a combustion rate of 0.1386 g/min, and carbon, volatile matter, and ash content percentages of 22.8333%, 26.845%, and 2.8323%, respectively.
Mengukur kualitas liga sepakbola melalui lateralitas kaki pemain: Sebuah pendekatan data analitik Silitonga, Dicky Januarizky; Adinegara, Muhammad Andi Yudha Cahya; Putri, Dwinda Mariska
Journal of Sport Science and Education Vol 8 No 2 (2023)
Publisher : Faculty of Sport and Health Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jossae.v8n2.p103-112

Abstract

The ability to use both sides of feet in association football, or so-called soccer in some countries, is highly valued, and therefore professional athletes rigorously train their non-dominant foot to perform effectively on the pitch. However, a subject that relates that players’ laterality aspect to the overall quality of the league of a given country has not yet been widely explored. This paper discusses the subject through a data analytics approach, leveraging the abundance of publicly available football datasets to describe interesting phenomena through data visualizations. In the present study, the foot laterality measure is represented by the percentage of left-footed scored goals and league’s overall quality by the market values of players. Results show that in general, leagues with higher market values have higher rates of left-footed goals. The findings in this work agree with those in past research conducted with other methods, hence confirming the validity of data analytics based on the crowdsourced football data. This research intends to emphasize the potential of data science in sport sector and motivate the football professionals to use big data to fine-tune their physical training methods and sport psychology approaches.
Numerical Beamforming and Parametric Descriptions of Laguerre-Gaussian Vortex Beams Silitonga, Dicky Januarizky; Alfian, Devia Gahana Cindi
International Journal of Applied Sciences and Smart Technologies Volume 05, Issue 02, December 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v5i2.6184

Abstract

Vortex beams are beams with a helical wavefront that have found applications in optical or acoustic tweezers to manipulate microscopic particles. Vortex beam imposes torque or force to particles, allowing them to trap the object within the beam's field and induce motion or displacement in a non-contact manner. One type of such beam is a Laguerre-Gaussian beam, where the solution of a Gaussian wave equation is modified by the Laguerre polynomial term that determines the pattern and helical characteristic of the beam. In this paper, a numerical method based on the mathematical expression of the Laguerre-Gaussian beam is implemented to describe how the parameters change the physical behavior of the beam. This work has shown that a straightforward numerical method is capable of producing this kind of beam. Therefore, this approach can be used for generating vortex beams for physical emissions, complex numerical simulations, or demonstrations for teaching purposes.
Co-Authors Adinegara, Muhammad Andi Yudha Cahya Devia Gahana Cindi Alfian Muhyi, Abdul Putri, Dwinda Mariska Saputra, Khamid Y. W.