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All Journal Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Akademika Kimia Jurnal Solusi Masyarakat (JSM)
Saharman Gea
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Chemistry Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Enhancement Mechanical Properties of Simalambuo Wood (Loppophetalum spp) Delignified using NaOH in The Thermomechanical Densification Method Nur Azizah; Febri Sindika; Andriayani Andriayani; Saharman Gea
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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Abstract

One of the problems with fast-growing wood is the low density, which causes poor mechanical properties, so a densification process is carried out to increase the wood's density, surface hardness, and strength. In this study, the delignification process using NaOH was carried out at variations of 12.24, and 48 hours and then continued with the thermomechanical densification process. This study decreased lignin content in delignification simalambuo wood from 30% to 4%. The value of the Modulus of Rupture, Modulus of elasticity, and surface hardness increases with increasing immersion time during the delignification process. The highest values of Modulus of Rupture, Modulus of elasticity, and surface hardness were obtained by simalambuo wood soaked for 48 hours, namely, 2828.23 kg/cm2, 97.47 kg/cm2, and 256.73 kg/cm2.
Pelatihan dan Pengembangan Peningkatan Kompetensi Penulisan Karya Ilmiah Bagi Dosen Universitas Prima Kota Medan Yeni Absah; Syafrizal Helmi Situmorang; Beby Karina F. Sembiring; Saharman Gea
Jurnal Solusi Masyarakat (JSM) Vol 2, No 1 (2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jsm.v2i1.15526

Abstract

Writing scientific papers is a way to convey knowledge, thoughts and research results to the scientific community and the general public. Lecturers who have competence in writing scientific papers are able to produce quality writing, based on strong research methodology, in-depth analysis, and a good understanding of their field of science. Quality scientific work not only contributes to the development of knowledge, but also triggers discussion, debate and further development. A lecturer's ability to write scientific papers also has an impact on the academic reputation of the lecturer himself and the institution where he teaches. Lecturers who are active in publishing scientific work in leading journals or contributing to academic books will be recognized as authorities in their field. Universities and higher education institutions have an important role in supporting the development of lecturers' competence in writing scientific papers. Scientific writing training or workshops will help lecturers understand the scientific writing process, from planning, data collection, to presenting results. Apart from that, interdisciplinary collaboration and collaborative networks with fellow researchers will also help in overcoming obstacles and improving the quality of scientific work. To overcome various obstacles and problems with lecturers' competence in writing scientific papers, the solution offered to overcome these problems is to provide training and assistance in writing scientific papers.
Teacher Upgrading Skill in Preparing Materials and Examination Based on Images in Sibolga City Andriayani Andriayani; Cut Fatimah Zuhra; Awan Maghfirah; Maulida Yanti; Saharman Gea; Khatarina Meldawati Pasaribu; Averrous Fazlurrahman Piliang
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.089 KB) | DOI: 10.32734/abdimastalenta.v5i2.5495

Abstract

There are 61 primary/ibtidaiyah schools, 18 junior high schools, and 18 senior high schools in the city of Sibolga, which is located in Teluk Tapian Nauli, with a total number of teachers of about 2000. This is in line with the vision of Sibolga city (2016-2021) in order to create a stable, advanced, and successful Sibolga City by producing highly competitive quality human beings in order to create a harmonious, peaceful, secure and unified society. As mentioned above, one of its mission points is to prepare human resources (HR) that have integrity, reliable, competitive, expert in science and technology so that they able to compete in the global job market. As the education stakeholder, Sibolga Education and Culture Official has plan many outstanding work programs such as made a collaboration in partnership with the Universitas Sumatera Utara community service team. As a result, based on field observations and discussions, it was known that one of the obstacle that facing by the teachers in Sibolga is not being able to provide teaching materials and also picture-based examination questions as contained in the question grid. Currently, there are several technology-driven applications that can be used to make images or graphics creating process easier. Two of them are, GeoGebra Classic that used to create graphics and images in mathematics and Chemdraw that used to create structure images that related to chemistry. In addition word optimization training was also conducted to optimize teacher on preparing teaching materials with Ms. word.
Co-Authors Andriayani Andriayani Averrous Fazlurrahman Piliang Awan Maghfirah Beby Karina F. Sembiring Cut Fatimah Zuhra Febri Sindika Khatarina Meldawati Pasaribu Maulida Yanti Nur Azizah Syafrizal Helmi Situmorang yeni absah