Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Dasar Prosidia Widya Saintek
Saputra, Akhmad Rizki
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Transportation

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
STUDI PENGARUH KOMBINASI REINFORCEMENT SERAT KULIT POHON WARU DAN KARBON KEVLAR TERHADAP IMPACT STRENGTH KOMPOSIT LAMINATE Saputra, Akhmad Rizki; Huda, Khisbullah; Fadhillah, Arief Rizki; Hermawan, Dadang
Prosidia Widya Saintek Vol. 4 No. 2 (2025)
Publisher : Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perkembangan teknologi industri material telah mendorong pencarian material alternatif yang ringan, kuat, murah, dan ramah lingkungan. Salah satu solusi adalah penggunaan serat alam, seperti serat kulit pohon waru (Hibiscus tiliaceus), yang memiliki karakteristik mirip logam. Selain itu, serat karbon Kevlar juga digunakan sebagai material penguat dalam komposit. Penelitian ini bertujuan untuk menguji pengaruh serat kulit pohon waru dan serat karbon Kevlar terhadap harga impact dan energi yang diserap pada komposit laminate. Hasil penelitian menunjukkan bahwa komposit dengan serat karbon Kevlar memiliki harga impact rata-rata tertinggi, yaitu 213,85 Joule/mm², karena kekuatan serat karbon Kevlar yang lebih tinggi serta sifat sintetiknya yang lebih rapat dibandingkan serat alam. Sebaliknya, komposit dengan serat kulit pohon waru memiliki harga impact rata-rata terendah, yaitu 32,23 Joule/mm². Namun, kombinasi antara serat kulit pohon waru dan serat karbon Kevlar menghasilkan harga impact yang lebih tinggi dibandingkan hanya menggunakan serat kulit pohon waru, dengan nilai 134,90 Joule/mm². Foto patahan menunjukkan bahwa titik patahan pada berbagai variasi tidak dapat diprediksi, karena patahan dapat terjadi pada posisi yang tidak dapat ditentukan. Penelitian ini membuktikan bahwa kombinasi serat kulit pohon waru dan karbon Kevlar memberikan kekuatan yang lebih baik dibandingkan serat kulit pohon waru.
Analisis konten Keterampilan Proses Sains Dasar dalam Rencana Pelaksanaan Pembelajaran di Sekolah Dasar Saputra, Akhmad Rizki; Widianto Atmojo, Idam Ragil; Saputri, Dwi Yuniasih
Jurnal Pendidikan Dasar Vol 11, No 1 (2023): Jurnal Pendidikan Dasar
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jpd.v11i1.70274

Abstract

This research was conducted with the aim of analyzing the content of basic science process skills in the lesson plan of learning at SD Negeri Tegalrejo No.98 Surakarta. The research was conducted using a qualitative approach. Data collection techniques in this study used document studies and interviews. This research data is in the form of content contained in the lesson plan. The validity of the instrument used is the Gregory validity test or expert validity calculations which produce valid data with increased persistence and theoretical triangulation. The results of the analysis of lesson plans the fourth grade students SD Negeri Tegalrejo No.98 Surakarta conclude that there is content related to basic science process skills in the lesson plan of learning by involving students but it is not optimal and still needs improvement. The content analysis of basic science process skills in the lesson plan was found as much as 51% contained in the communication indicator as the largest number with 38 content and stated in the sufficient category. The indicator with the second number, namely observing has a percentage of 24% or as many as 18 content with low categories. The content of basic science process skills in the third order is found in the predictive indicator as much as 11% with 8 content categorized as very low. Furthermore, the indicator grouping is in fourth place as much as 9% with 7 content that is categorized as very low. The fifth order is the indicator concludes with a percentage of 5% with 4 content categorized as very low. Meanwhile, the basic science process skills measuring indicators in the fourth grade lesson plan were not found at all. So that the total content of basic science process skills found in the lesson plan is 75 content.
Co-Authors Arief Rizki Fadhillah Dadang Hermawan Huda, Khisbullah Idam Ragil Widianto Atmojo Saputri, Dwi Yuniasih