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All Journal Jurnal Penelitian Pendidikan Kimia Jurnal Pertahanan : Media Informasi tentang Kajian dan Strategi Pertahanan yang Mengedepankan Identity, Nasionalism dan Integrity
Adhistia Amelia
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Chemistry Education Other

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PENERAPAN MODEL PROBLEM BASED INSTRUCTION (PBI) UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS DI SEKOLAH MENENGAH ATAS Adhistia Amelia; Hartono Hartono; Diah Kartika Sari
Jurnal Penelitian Pendidikan Kimia: Kajian Hasil Penelitian Pendidikan Kimia Vol 1, No 1 (2014)
Publisher : Chemistry Education Study Program Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jppk.v1i1.2225

Abstract

The Application of Problem Based Instruction (PBI) to Improve Science Process Skills in Senior High School. This research is action research that consist of three cycles and placed in class XI IPA 2 SMAN 1 Palembang. Stages of each cycle are plan, act, observe, and reflect. Data were obtained from the observation sheet of student’s science process skills and the final test cycle. The average percentage of student’s science process skills in the first cycle of57.82%, the second cycle of 75.2%, and 86.59% for the third cycle. The results showed that the application of the Problem Based Instruction could improve students’ science process skills classXI IPA 2 SMAN 1 Palembang.
A REVIEW OF PENETRATION TUNGSTEN BASED PROJECTILE ON DEPTH OF PENETRATION AT ARMOR OF CERAMIC BASED Abdul Basyir; Erna Shevilia Agustian; Adhistia Amelia
Jurnal Pertahanan: Media Informasi ttg Kajian & Strategi Pertahanan yang Mengedepankan Identity, Nasionalism & Integrity Vol 6, No 3 (2020)
Publisher : The Republic of Indonesia Defense University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33172/jp.v6i3.890

Abstract

Nowadays, tungsten-based material is used for the core of projectile, while ceramic-based is used for the main material of armor. Tungsten-based material is chosen because it has density and hardness superior to steel based-material. Meanwhile, the ceramic-based can enhance mobility and resistance penetration of armor.  Penetration of projectile on target generates an impact velocity parameter. This velocity has resulted when the projectile hits the target. Therefore, the value of impact velocity affects the quantity of depth of penetration (DoP) result. This paper reviews some papers regarding the penetration of tungsten-based projectile on ceramic-based armor. Furthermore, the content of these papers is reviewed by the narrative review method, and the impact velocity and DoP are the main data to analyze. Through this paper, impact velocity has a linear correlation with the DoP, the big of impact velocity produced bigger of DoP, and vice versa. Based on the data in this review, for the same impact velocity, material, and (almost) dimension of a projectile, SiC has better penetration resistance than B4C, TiB2, and Al2O3. Furthermore, the parameter of projectile dimension, projectile material type, target design, and material composition of the target also affects the DoP result.
Co-Authors Abdul Basyir Diah Kartika Sari Erna Shevilia Agustian Hartono Hartono