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All Journal JURNAL PENDIDIKAN JASMANI DAN OLAHRAGA Jurnal Sains Materi Indonesia
Pramutadi, Asril
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Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health

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Kinetics Analysis of Overhead Standing Smash in Badminton Rusdiana, Agus; Subarjah, Herman; B, Badruzaman; Budiman, Didin; Wibowo, Ricky; Nurjaya, Dede Rohmat; Pramutadi, Asril; Mustari, Andi; Kusdinar, Yopi; Syahid, Angga
JURNAL PENDIDIKAN JASMANI DAN OLAHRAGA Vol 6, No 1 (2021): Opportunities from The Sport and Health Education to Improve Quality of Life
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (670.111 KB) | DOI: 10.17509/jpjo.v6i1.32577

Abstract

The purpose of this study was to analyze the joint motion kinetics of the shoulders, elbows, and wrists between experienced player (skilled player) group and unskilled player group when performing overhead standing smash in badminton game. The samples involved were 26 samples. The samples included 13 male badminton players joining Student Activity Unit who had achieved many achievements and had a high skill (skilled), while the other 13 samples were unskilled players, involving students who had just studied under one year. The mean of participants’ age was 19.4 ± 1.6 years, height was 1.73 ± 0.12m, and body weight was 62.8 ± 3.7kg. This study used 3 Panasonic Handycams, a calibration set, 3D Frame DIAZ IV motion analysis software, and a speed radar gun. Normalization of the kinetic motion score of the shoulder, elbow, and wrist joints was calculated using the inverse dynamics method. The t-test was used to determine the significance of motion kinetic difference of the two different groups. The results presented that the shuttlecock speed of the skilled player group, during the overhead standing smash, showed a significant difference. Meanwhile, the joint motion of the inferior shoulder force, shoulder anterior force, shoulder internal rotation torque, shoulder horizontal abduction torque, elbow anterior force, and wrist flexion torque were higher in the skilled players group than the unskilled player group.
High Temperature Corrosion On Inconel and Carbon Steel Filler of Weldment in Liquid Pb at 800 ̊C pramutadi, asril; wafda, hakimul; P.M. Adi
Jurnal Sains Materi Indonesia Vol. 27 No. 2 (2026): Jurnal Sains Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2026.11718

Abstract

This study evaluates the corrosion behavior of SS316 material welded using Inconel and 70S fillers in a static liquid lead (Pb) environment saturated with oxygen at 800 °C for 36 hours, simulating accident conditions in a lead-cooled fast reactor (LFR). Welding was carried out using laser welding (Inconel filler) and metal inert gas (MIG) (70S filler) methods, representing structural joints in the reactor. The results of scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analysis showed the formation of a spinel-type oxide layer (Fe-Cr-O) in both weld areas, with the laser welding sample showing deeper Pb penetration due to the porosity of the oxide layer. In contrast, in MIG welding, the oxide layer was denser with limited Pb penetration at the spinel-matrix interface. The base metal (BM) only formed a thin layer without significant oxide, but showed lower Pb penetration. These results provide critical insights into filler metal performance under extreme conditions, supporting material selection and weld design strategies for enhanced safety and longevity in next-generation lead-cooled fast reactors.
Co-Authors Agus Rusdiana,, Agus B, Badruzaman Dede Rohmat Nurjaya, Dede Rohmat Didin Budiman, Didin Herman Subarjah Kusdinar, Yopi Nurwijayanti P.M. Adi Ricky Wibowo Syahid, Angga Muhamad Wafda, Hakimul