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Dwi Agus Sudjimat
Universitas Negeri Malang
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Sokasi Commodity Production: The Utilization of Bamboo Stem Fiber Composite to Create Balinese Local Products Wigraha, Nyoman Arya; Djoko Kustono; Tuwoso; Dwi Agus Sudjimat
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 1 (2024): April
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i1.76654

Abstract

This research aims to determine the optimal combination of a mixture containing bamboo fibre and polyester resin, with the addition of coconut fibre as a reinforcing material. The main objective of this research is to test tensile tests to determine the most suitable strength factor. In addition, this research aims to evaluate how changes in specific parameters affect the tensile characteristics of composite materials. The parameters observed include the proportion of the matrix to the volume of coconut fibre, the percentage of alkali concentration, and the length of the coconut fibre. The composite fabrication stage involves using the hand lay-up and Taguchi methods. The reason for choosing the L4(23) orthogonal experimental design is that there are three process parameters, each with two levels. The trial was duplicated five times. Important factors studied include the ratio of matrix and volume of coconut fibre, alkali concentration, and length of coconut fibre. Based on the results obtained from this research, it has been proven that the most effective combination to achieve the highest tensile strength is a matrix that accounts for 60% of the composition, coconut fibre occupies 20% of the volume, and an alkali concentration of 5.%, and coconut fibre strands measuring 30 mm long. The tensile strength test result of this particular composition was 54.34 MPa. Apart from that, the length of coconut fibre is the most significant factor in increasing tensile strength, with a contribution of 42.560%.
PENGARUH STRATEGI PEMBELAJARAN INKUIRI TERBIMBING BERBANTUAN LABORATORIUM VIRTUAL PADA PEMBELAJARAN TEMATIK TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA SEKOLAH DASAR Lestari, Iis; Kuswandi, Dedi; Sudjimat, Dwi Agus
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6262

Abstract

Technological developments in the world of education are very rapid, requiring education to continue to have innovation and renewal in learning approaches to be able to produce generations or highly competitive human resources who are able to have critical thinking skills. The purpose of this research is to determine the differences in critical thinking abilities between students who are taught using a guided inquiry learning strategy assisted by a virtual laboratory and those who are taught using a guided inquiry strategy without the assistance of a virtual laboratory in thematic learning in class V elementary school. This type of research is quasi-experimental, while the research design used is nonequivalent control group design. The sampling technique uses nonprobability sampling with a saturated sampling technique. Meanwhile, the instrument in this research is a test. The results of the research through hypothesis testing using the t test with a significance level of 5%, show that the >  (3,283 > 2,712) and the significant value shows sig < 0.05 (0.002 < 0.05), then  is rejected and  is accepted, so it can be concluded that there is differences in critical thinking abilities between students who were taught using guided inquiry learning strategies assisted by virtual laboratories and those taught using guided inquiry strategies without virtual laboratory assistance in thematic learning in class V of elementary schools
Co-Authors Achmad Fauzi Bahauddin Agus Hery Supadmi Irianti Ahmad Sonhadji K.H., Ahmad Sonhadji Alfin Ageng Nandra Kurniawan Amri, Muhammad Shafiul Ayu Septiana Pratiwi Bella Cornelia Tjiptady Cahyaningrum, Nur Candra Utama Dedi Kuswandi Dian Prayogi Dianna Ratnawati Didik Nurhadi Djoko Kustono Egithia Alfi Rosydiana Faisol Khoufi Asshidiqi Hakkun Elmunsyah Iis Lestari, Iis Imam Sudjono Laili Hidayati Luchyto Chandra Permadi Luchyto Chandra Permadi Permadi Machmud Sugandi Maftuchin Romlie Makbul Muksar Mariana, Vivi Eka Marji . Marsono Marsono Naana, Tesya Mahdaniya Ode Nidhom, Ahmad Mursyidun Nyoman Arya Wigraha Olga Putriana Wati Purnomo Purnomo R. Mahmud Sugandi Rina Rifqie Mariana Rohman, Mojibur Subandi, Mahfudi Sahly Suwarno Suwarno Thomas Aditya Santoso Toto Nusantara Tri Kuncoro Tuwoso Worowirastri E., Dyah Zain, Mochammad Masyfuk