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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Ilmiah Pembelajaran Sekolah Dasar Lintang Aksara
Ramadhani, Riski
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Education Energy Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Other

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PENGARUH PENGGUNAAN MEDIA PhET SIMULATION DALAM PEMBELAJARAN IPA TERHADAP HASIL BELAJAR SISWA Ramadhani, Riski; hamid, Rimba; Hikmawati
Jurnal Ilmiah Pembelajaran Sekolah Dasar Vol. 5 No. 2 (2023): Jurnal Ilmiah Pembelajaran Sekolah Dasar
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jipsd.v5i2.15

Abstract

Penelitian ini bertujuan melihat pengaruh penggunaan Media PhET Simulation pada hasil belajar siswa dalam pembelajaran IPA di kelas VI SDN 1 Wawolesea Kabupaten Konawe Utara. Jenis penelitian ini, yaitu pendekatan kuantitatif. Rancangan penelitian ini, yaitu Pre-Experimental Design model One Group Pretest-Posttest Design. Populasi penelitian siswa kelas VI SD Negeri 1 Wawolesea Kabupaten Konawe Utara tahun ajaran 2022/2023 yang berjumlah 23 orang siswa. Penentuan sampel melalui sampling jenuh atau sensus maka smapel berjumlah 23 orang siswa. Teknik pengumpulan data melalui Tes. Hasil penelitian terdapat pengaruh penggunaan media PhET simulation dalam pembelajaran IPA terhadap hasil tes belajar siswa kelas VI SD Negeri 1 Wawolesea dengan hasil analisis One-Sample Test dengan nilai sig ₌ 0,000 ˂ 0,05
BAHASA MELAYU JAMBI SECARA UMUM, DIALEK-DIALEK DALAM BAHASA MELAYU JAMBI, DAN AKSARA MELAYU JAMBI Ramadhana, Riska; Ramadhani, Riski; Kusmana, Ade; Wini, Lusia Oktri
Lintang Aksara Vol. 3 No. 2 (2024): Lintang Aksara
Publisher : Program Studi Pendidikan Bahasa dan Sastra Indonesia Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jla.v3i2.35086

Abstract

Bahasa Melayu Jambi, dialek-dialeknya, dan aksara Melayu Jambi merupakan bagian integral dari kekayaan budaya dan linguistik di wilayah Jambi, Indonesia. Bahasa Melayu Jambi adalah varian bahasa Melayu yang dituturkan di Jambi dan mencerminkan warisan budaya yang kaya dan keragaman linguistik. Dialek-dialek dalam bahasa Melayu Jambi, seperti Dialek Kota Jambi, Dialek Muaro Jambi, dan lainnya, menunjukkan variasi dalam pengucapan, kosakata, dan struktur kalimat yang tercermin dalam konteks budaya dan sejarah  lokal. Di sisi lain, aksara Melayu Jambi, yang sering disebut sebagai aksara Pegon, menggunakan aksara Arab atau Jawi yang dimodifikasi untuk menulis Bahasa Melayu dengan ciri khas yang unik.
Characteristics of Profile Pin Variation in HDPE Friction Stir Welding to Mechanical Properties of Materials Agus Wahyu Setiawan; Budi Darsono, Febri; Kriswanto; Ramadhani, Riski
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.15638

Abstract

Friction Stir Welding (FSW) is one of the Solid-State Welding processes, which joins materials below their melting point by continuously rubbing two workpieces together to generate heat. The FSW process heavily relies on the use of pin profiles, which play a crucial role in forming the weld joint, as they directly affect material flow in the weld zone and heat distribution during the welding process. This research aims to evaluate the mechanical properties of FSW joints made using different pin profile variations, in order to achieve high-quality welds. The study applies a descriptive statistical analysis approach, utilizing tensile testing, flexural testing, hardness testing, and macro photography. The material used in this research is High-Density Polyethylene (HDPE), with three types of pin profiles: triangular, threaded cylindrical, and grooved cylindrical. The welding parameters are kept constant: feed rate of 25 mm/min, spindle speed of 930 RPM, plunge depth of 3.84 mm, and tilt angle of 0°. The results show that the threaded pin profile produced the highest average values: hardness of 59.5 SHD, tensile strength of 11.5 MPa, and flexural strength of 22.4 MPa. In contrast, the grooved pin profile showed the lowest average values: hardness of 57.83 SHD, tensile strength of 4.99 MPa, and flexural strength of 4.22 MPa. The mechanical strength test results were influenced by weld defects observed through macro images. These weld defects significantly impacted the mechanical properties and demonstrated that pin profile geometry plays a vital role in heat generation through friction and in controlling the material flow dynamics, which directly determine the structural integrity and mechanical performance of the weld joint.
Co-Authors Ade Kusmana Agus Wahyu Setiawan Budi Darsono, Febri Hikmawati Kriswanto Ramadhana, Riska Wini, Lusia Oktri