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All Journal Jurnal Kesehatan Tambusai Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) AL JABAR: Jurnal Pendidikan dan Pembelajaran Matematika
Atmadi
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Chemistry Dentistry Health Professions Mathematics Medicine & Pharmacology Nursing Public Health

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Socialization of CBRN-E Threat and Its Anticipation Toward Students of a Particular Senior High School in Bogor Area Stiawan, Elva; Sari, Dini Rusfita; Gita, Mutiara; Atmadi
Jurnal Kesehatan Tambusai Vol. 5 No. 3 (2024): SEPTEMBER 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jkt.v5i3.33269

Abstract

Kesadaran bela negara sudah sepatutnya disadari secara luas dan khususnya diterapkan oleh generasi muda Indonesia saat ini. Gagasan tersebut hendaknya disampaikan secara strategis kepada siswa-siswa SMA untuk mempersiapkan sumber daya manusia berkualitas yang mendukung pertahanan negara, khususnya dalam mengantisipasi ancaman Bahan Kimia, Biologi, Radiologi, Nuklir, dan Bahan Peledak (CBRN-E). Namun informasi mengenai pemahaman CBRN-E pada tingkat siswa SMA di Indonesia masih terbatas. Pengabdian masyarakat ini bertujuan untuk memberikan profil khusus pemahaman siswa SMA setempat terhadap ancaman CBRN-E sebagai wawasan program selanjutnya dalam mengantisipasi ancaman CBRN-E. Selain melakukan sosialisasi kepada siswa SMA di salah satu SMA tertentu di Kabupaten Bogor, kami menganalisis secara singkat pemahaman awal mereka terhadap isu-isu terkait pertahanan dan topik terkait kimia melalui pre-test kuesioner yang dirancang. Hasil studi pendahuluan ini menunjukkan bahwa pengetahuan mereka tentang ancaman CBRN-E harus diperkuat. Menariknya, sebagian besar peserta mempunyai persepsi positif mengenai preferensi karir mereka untuk mendukung sektor pertahanan negara, misalnya minat mereka untuk berkontribusi di bidang kimia untuk memperkuat pertahanan negara. Temuan ini menyiratkan mendorong pemangku kepentingan pendidikan untuk berkolaborasi secara strategis dengan lembaga pertahanan negara untuk mengintegrasikan materi pembelajaran terkait CBRN-E ke dalam kurikulum yang ada.
EKSPLORASI ETNOMATEMATIKA DALAM AL-QUR’AN SEBAGAI SUMBER BELAJAR Atmadi; Nuryami
AL JABAR: Jurnal Pendidikan dan Pembelajaran Matematika Vol. 3 No. 1 (2024): Januari
Publisher : LPPM Institut Ahmad Dahlan Probolinggo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46773/aljabar.v3i1.918

Abstract

Mathematics is one of the subject areas taught from elementary school to high school and even to universities. Mathematics is also one of the subjects that is considered difficult by many students, but mathematics is very important in improving human thinking and this science also plays a very important role in everyday life. Through this ethnomathematics exploration, students will find it easier and more enjoyable to learn mathematics from the Qur’an. Mathematics has a close relationship with the Qur’an without us realizing it, such as odd numbers, even numbers, and prime numbers listed in surah Al-kahf verse 22, verse 25, Al-ankabut verse 14, Al-baqarah verse 261, and annisa’ verse 11-12. The purpose of this research is to describe and elaborate mathematics learning in number theory contained in the Qur’an. The method in this research is using qualitative method which is done by observation and literature study. From this research, it is known that there is a relationship between the words of God contained in the Qur’an and the concept of mathematics, and it is proven that always math lessons can solve all problems in Islam. This research is expected to facilitate the learning of mathematics and can show that there is a connection with the Qur’an. Thus later mathematics lessons are not only as ordinary subjects, but can also be seen in religion, so the researcher took the title Exploration of Ethnomathematics in the Qur’an as a learning resource.Keywords: exploration, ethnomathematics, Qur’an
EFEKTIVITAS PENGGUNAAN MEDIA PEMBELAJARAN PAPAN SISTEM PERSAMAAN LINEAR DUA VARIABEL TERHADAP PEMAHAMAN SISWA KELAS VIII Atmadi; Tuhfatul Janan
AL JABAR: Jurnal Pendidikan dan Pembelajaran Matematika Vol. 3 No. 2 (2024): Juli
Publisher : LPPM Institut Ahmad Dahlan Probolinggo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46773/aljabar.v3i2.957

Abstract

This study aims to determine the effectiveness of the use of learning media board system of linear equations of two variables (SPLDV) on the understanding of 8th grade students. This research was conducted in September 2023, the first week to the third week, located at MTs Miftahul Ulum. In this study, the data normality test was carried out using the shapiro-wilk method where the results showed that the pre-test significance was 0.207 and the post-test was 0.202, which means that the data is normally distributed. Then the normality gain test was conducted to determine the effectiveness of the SPLDV board as a learning media with an average N-gain score of 0.6724 and the average N-gain percent was 63.8823%. Keywords: learning media, spldv, math
Copolymerization of Tapioca Starch Waste through Grafting of Acrylic Acid Monomer with Cerium(IV) Initiator as Super Absorbent Polymer (SAP) Candidate Kurniadi, Tedi; Prasojo, Agus Eko; Putri, Riyanti; Nurwanto; Hartono, Rudi; Atmadi
Indonesian Journal of Chemical Studies Vol. 4 No. 2 (2025): Indones. J. Chem. Stud. December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ijcs.v4i2.81

Abstract

Indonesia, one of the world's largest tapioca starch producers, generates abundant cassava starch waste (onggok) that remains underutilized. This study aimed to enhance the value of onggok by synthesizing a superabsorbent polymer (SAP) through graft copolymerization using acrylic acid monomer and cerium(IV) initiator. Grafting was optimized by varying monomer concentrations (10–40% w/w) while maintaining the initiator concentration at 1.70% (w/w) and a reaction temperature of 53 °C. The optimal grafting occurred at 20% monomer concentration, yielding a grafting percentage of 14.83% and a monomer conversion of 74.15%. FTIR analysis showed increased absorbance ratios of –OH to C=O functional groups, confirming successful grafting. SEM images revealed a transformation from granular to porous structures, while DSC analysis demonstrated a shift in gelatinization temperature from 45.91 °C (raw onggok) to 46.69 °C (grafted), and retrogradation temperature from 140.67 °C to 141.67 °C. The water absorption capacity of the grafted copolymer reached 4.2450 g/g (5.20 g total), nearly double that of raw onggok (2.2716 g/g or 3.20 g), confirming its effectiveness as a SAP material.
Co-Authors Elva Stiawan Gita, Mutiara Hartono, Rudi Kurniadi, Tedi Nurwanto Nuryami Prasojo, Agus Eko Putri, Riyanti Sari, Dini Rusfita Tuhfatul Janan