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Pemodelan Wahana Rintang Bola untuk Meningkatan Kerja Sama Anak di Taman Mekarsari, Boyolali Santoso, Budi; Imaduddin, Fitrian; Triyono, Joko; Widodo, Purwadi Joko; Lambang G H, Raymundus Lullus; Sukanto, Heru; Ubaidillah, Ubaidillah; Arifin, Zainal; Prasojo, Yudin Joko; Prasetyo, Singgih Dwi
Jurnal PADAMU NEGERI (Pengabdian pada Masyarakat Bidang Eksakta) Vol 4, No 2 (2023)
Publisher : Perkumpulan Dosen Muda (PDM) Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37638/padamunegeri.v4i2.816

Abstract

Anak-anak usia dini merupakan masa dimana bermain masih menjadi rutinitas yang dilakukan setiap saat. Untuk memfasilitasi bermain anak, perlu adanya taman bermain agar anak-anak dapat berinteraksi satu sama lain. Taman bermain merupakan lingkungan yang menyediakan kesempatan bermain, belajar, rekreasi, dan berinteraksi bagi anak-anak. Taman bermain tidak hanya merupakan tempat hiburan semata, tetapi juga berperan sebagai ruang pendidikan yang mendukung perkembangan fisik, kognitif, sosial, dan karakteristik anak-anak. Maka dari itu, dilakukan Pengabdian dengan tujuan untuk meningkatkan kerja sama dari anak-anak yang bermain. Melalui kerjasama ini diharapkan dapat terbentuk sifat saling percaya dalam diri anak-anak yang masih dalam masa perkembangan. Pengabdian ini dilakukan dengan merancang wahana bermain untuk anak berupa rintang bola di Taman Mekarsari Desa Kaligentong, Kecamatan Gladagsari, Kabupaten Boyolali. wahana bermain rintang bola adalah sumber daya berharga untuk memfasilitasi perkembangan keterampilan motorik anak usia prasekolah. Penggunaan wahana bermain rintang bola dalam taman bermain dapat menjadi sarana yang efektif untuk meningkatkan keterampilan fisik dan perkembangan anak-anak secara menyenangkan dan interaktif. Hasil Pengabdian ini diharapkan dapat memberikan sumbangan yang berarti bagi pengembangan lebih lanjut dari wahana bermain yang mendukung perkembangan anak secara menyeluruh.
Improving Solvolysis Rate Via Under Glass-Transition Temperatures Quenching Followed by Roll Bending of Carbon Fiber Reinforced Polymer Composite Sukanto, Heru; Kusharjanta, Bambang; Kaavessina, Mujtahid
TEKNIK Vol 45, No 3 (2024): December 2024
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v45i3.59296

Abstract

Reusing carbon fiber once it has been used as reinforcement in composite structures involves a complex recycling technique. This recycling process requires a strategy to ensure the recycled carbon fiber meets technical standards. Among various recycling processes, the solvolysis technique yields carbon fiber with high purity. However, solvolysis is also the most time-consuming method. This study proposes using quenching and roll-bending pretreatments, which increase the contact surface area between the composite and the solvent solution for expediting the solvolysis process of carbon fiber reinforced polymer (CFRP) composite. Quenching was performed by heating the composite to 75°C, 100°C, and 125°C before immersing it in water at room temperature. Roll bending was designed based on the principle of three-point bending and aimed to induce a strain in the composite that exceeds the strain of the epoxy resin. Quenching at 75°C, followed by roll bending, resulted in a 21% increase in the surface area of the composite. This increased area improved the solvolysis efficiency of CFRP composites by up to 21% after four days of immersion in a mixture of acetone and acetic acid.
FOURIER TRANSFORM INFRARED SPECTROSCOPY INTERPRETATION DAN THERMOGRAVIMETRY/DIFFERENTIAL SCANNING CALORIMETRY ANALYSIS ON THERMOSETTING RESIN PRODUCTS WITH QUENCHING TREATMENT Sukanto, Heru; Widodo, Purwadi Joko; Arifin, Zainal; Triyono, Joko
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

The quenching phenomenon observed in thermosetting epoxy resins necessitates a comprehensive investigation to mitigate its potential adverse effects on material performance. This study presents a novel approach to analyzing epoxy resins by employing Fourier Transform Infrared (FTIR) spectroscopy, Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC). Epoxy resin specimens were fabricated using a 1:1 weight ratio of diglycidyl ether bisphenol A resin and cycloaliphatic amine hardener. The quenching process was executed by submerging the specimens in water at ambient temperature following thermal exposure at 75, 100, 125, and 150°C. The FTIR and TGA/DSC analyses were verified by tensile testing, which revealed that FTIR analysis provided insights into the degree of crosslinking and hydroxyl index, while TGA/DSC data elucidated the glass transition temperature and crosslinking enthalpy. The findings demonstrated a direct correlation between the tensile strength and strain of the epoxy resin with changes in crosslinking enthalpy, and an inverse relationship with the hydroxyl index.