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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan JURNAL GALUNG TROPIKA Jurnal Pemberdayaan Masyarakat Jurnal Pendidikan IPA Indonesia
Hamzah, H
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Social Sciences

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Studi Karakteristik Resonansi Gerak Rolling Akibat Perbedaan Karakteristik Lengan Stabilitas Paroka, Daeng; Rosmani, R; Asri, Syamsul; Hamzah, H
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 16, No 1 (2019): Februari
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (954.664 KB) | DOI: 10.14710/kapal.v16i1.22046

Abstract

Beberapa type kapal tidak dapat memenuhi kriteria stabilitas karena perbedaan karakteristik geometri seperti kapal feri ro-ro Indonesia yang memiliki lambung timbul dan sarat yang kecil dibandingkan dengan lebar kapal. Oleh karena itu, kriteria stabilitas khusus untuk kapal dengan karakteristik geometri yang tidak terakomodir pada kriteria IMO penting untuk dikembangkan. Paper ini membahas tentang pengaruh karakteristik lengan stabilitas terhadap respon gerak roll pada gelombang samping. Hal ini merupakan langkah awal dalam pengembangan kriteria stabilitas yang berbasis karakteristik lengan stabilitas. Respon gerak berupa amplitudo resonansi sebagai fungsi frekuensi eksitasi dihitung dengan menyelesaikan persamaan gerak roll menggunakan metode multiple scale.Karakteristik lengan stabilitas divariasikan dengan tinggi metacentra serta sudut kemiringan dengan lengan stabilitas sama dengan nol tetap sama untuk semua variasi.Hasil perhitungan menunjukkan bahwa frekuensi resonansi menjadi lebih kecil dari frekuensi natural roll untuk koefisien kekakuan lebih kecil dari nol dan lebih besar dari frekuensi natural apabila koefisien tersebut lebih besar dari nol.Gerak roll tidak stabil mulai terjadi ketika amplitudo roll lebih besar dari sudut kemiringan dengan lengan stabilitas maksimum ketika rasio tinggi dan panjang gelombang sama dengan atau lebih besar dari 0.04.Untuk karakteristik lengan stabilitas kapal pada muatan penuh, ketidakstabilan gerak roll mulai terjadi pada rasio tinggi dan panjang gelombang sama dengan 0.06.
INTENSITAS SERANGAN HAMA ULAT GRAYAK SPODOPTERA FRUGIPERDA PADA TANAMAN JAGUNG DI KABUPATEN TAKALAR Noerfitryani, N; Anwar, Andi Rahayu; Hamzah, H; Syamsia, S; Sampara, S
Jurnal Galung Tropika Vol 12 No 1 (2023)
Publisher : Fakultas Pertanian, Peternakan dan Perikanan Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/jgt.v12i1.1067

Abstract

Spodoptera frugiperda is an invasive insect and includes a highly polyphagous insect that can attack various types of plants. Armyworm attacks can be a severe threat to corn farmers. It can cause significant yield loss. This study aims to determine the attack intensity and distribution of the S. frugiperda armyworm in several sub-districts on several varieties of maize in Takalar Regency, South Sulawesi, as the first step in determining an appropriate control strategy. The results showed that from the five sub-districts where the observations were made, there were symptoms of S. frugiperda attack, namely in the sub-districts of South Polongbangkeng, North Polongbangkeng, Sanrobone, South Galesong, and Pattallassang. The highest attack intensity was around 97.33% of 4 weeks in Pallantikang Village, Pattallassang District. The lowest attack intensity, namely 46.44% of 3 weeks, was found in Kadatong Village, South Galesong District.
Pelatihan Penulisan Artikel Ilmiah untuk Guru Jumini, Sri; Ariyani, Mila; Hamzah, H; Hidayat, H; Priyanto, Heri
Jurnal Pemberdayaan Masyarakat Vol 3, No 2 (2024)
Publisher : Yayasan Keluarga Guru Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46843/jpm.v3i2.315

Abstract

The scientific article writing training program implemented at SMA N 1 Wadaslintang aims to improve the skills of teachers and students in writing quality scientific articles. This program is designed to equip teachers and students with technical skills in scientific writing as well as develop systematic research abilities. This research uses a Participatory Action Research (PAR) approach, which places teachers and students as active participants in every stage of the program, from planning, and implementation, to evaluation. With this approach, teachers and students are not only the objects of training but also participate in the process of reflection and improvement of the program. Through the PAR approach, it is hoped that students can understand more deeply the scientific writing process and make a direct contribution to improving the quality of learning. The results of this training show a positive impact on scientific article writing skills. This is proven by the participants who got a perfect score of 100 on the competency test. They can write more structured and follow correct scientific principles. This program also succeeded in increasing motivation to continue developing writing and research skills.     
Analysis of Items for Measuring Technological Literacy Using the Rasch Model Jumini, Sri; Madnasri, Sutikno; Cahyono, Edy; Md Nadrah, Yatim; Hamzah, H; Fatiatun, F
Jurnal Pendidikan IPA Indonesia Vol. 13 No. 2 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/04k5q459

Abstract

This research aims to describe the results of the analysis of the quality of the test items for technological literacy skills using the Rasch model from the aspects of validity, reliability, and level of difficulty of the questions. This research uses a descriptive quantitative approach, with construction design and validation. Data was obtained through a test method in the form of 15 multiple-choice questions and a questionnaire with 40 questions. The test was carried out on 6th-semester physics students with an integrated science course totaling 30 students. Data analysis was carried out by describing the results of data processing using the Rasch Model with Winsteps software. The research results showed that the quality of the items on the instrument measuring technological literacy in the validity aspect contained 7 valid questions, and 6 invalid questions regarding knowledge. Meanwhile, 36 questions about attitude measurement were valid and 4 questions were invalid. In the reliability aspect for knowledge questions, the reliability item value is 0.93 in the very good category. Meanwhile, in the attitude questionnaire, the item reliability value was 0.98 in the special category. In terms of the level of difficulty of the questions, for knowledge questions, there are 2 easy questions, 5 medium, 5 difficult, and 3 very difficult. In the very difficult question category, only students with high abilities can answer. For attitude questions, there are 7 easy questions, 14 medium, 9 difficult, and 10 very difficult questions. It can be concluded that this technological literacy test item is suitable for use in assessing technological literacy competency so that it can contribute to measuring technological literacy which has not been done much.
Co-Authors Anwar, Andi Rahayu Ariyani, Mila Daeng Paroka Edy Cahyono Fatiatun, F Heri Priyanto, Heri Hidayat, H Madnasri, Sutikno Md Nadrah, Yatim Noerfitryani, N R, Suhartina Rosmani, R Sampara, S Sjamsir, Zulkfili Sri Jumini Syamsia, S Syamsul Asri