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Experimental Study of Concrete Composites of Fly Ash and Ferronickel Slag for Gamma-Ray Shielding Patrick Marcelino Wongso; Syamsir Dewang; Eko Budi Jumpeno; Okky Agassy Firmansyah; June Mellawati
Jurnal Ilmiah Aplikasi Isotop dan Radiasi Vol 16, No 1 (2020): JUNI 2020
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jair.2020.16.1.5800

Abstract

This study aim is to determine the effect of partial replacement of cement by high percentages of fly ash and ferronickel slag as gamma radiation shielding properties of concrete. The percentages of replacement were 30% for fly ash and 10%, 20%, and 30% for ferronickel slag by weight of fine aggregate. Several physical parameters (linear attenuation coefficients, mass attenuation coefficients, half value layer, tenth value layer, mean free path, effective atomic number, and effective electron density) of concretes were measured using 600cc Thin Window Ionization Chamber. A broad beam transmission geometry method with 137Cs source was used for the radiation intensity measurements. The elemental compositions of the concretes were analyzed by using an energy dispersive X-ray Fluorescence Spectrometer (EDXRF). In this experiment, the concrete composite sample with composition of 0% fly ash and 30% ferronickel slag shows the most effective result in absorbing low energy gamma rays, therefore it has the potential as a candidate for gamma radiation shielding.
PELATIHAN PEMBUATAN PAPAN IKLAN DOT-MATRIKS BERBASIS MIKROKONTROLER DI SMKN 1 WAJO A. Arifin; Ida Laila; Muqoil Darussalam; Nurlindah Hamrun; Dahlang Tahir; Syamsir Dewang
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 5 No. 3 (2021): Jurnal Panrita Abdi - Juli 2021
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v5i3.11254

Abstract

Technological development in the manufacture of microcontroller-based dot-matrix billboards carried out in the form of counseling and training for students at Wajo 1 State Vocational High School (SMK). The implementation of this training aims to increase the insight, knowledge, and skills of vocational school students, which are an educational level that must have different knowledge from the level of education in general. The method of implementing this activity includes site observation, preparation, counseling, and provision of materials related to physics and energy, entrepreneurship, optoelectronic technology, as well as the implementation of training on making Arduino microcontroller-based dot-matrix billboards and evaluating the training implementation. The result of this activity is an increase in the knowledge and insight of students in terms of making a series of dot-matrix billboards using electronic components, understanding program code, running the Arduino Integrated Development Environment (IDE) program, conducting simulations on circuits using the Arduino microcontroller and students have successfully demonstrated and run the running text panel that was created using an Android smartphone. --- Pengembangan teknologi dalam pembuatan papan iklan dot-matriks berbasis mikrokontroler yang dilakukan dalam bentuk penyuluhan dan pelatihan kepada siswa-siswi di Sekolah Menengah Kejuruan (SMK) Negeri 1 Wajo . Pelaksanaan pelatihan ini bertujuan untuk meningkatkan wawasan, pengetahuan dan keterampilan siswa-siswi SMK yang merupakan tingkat pendidikan yang harus memiliki pengetahuan yang berbeda dari tingkat pendidikan pada umumnya. Metode pelaksanaan kegiatan ini meliputi peninjauan lokasi, persiapan, penyuluhan dan pemberian materi terkait fisika dan energi, kewirausahaan, teknologi opto-elektronika, serta pelaksanaan pelatihan pembuatan papan iklan dot-matriks berbasis mikrokontroler arduino dan evaluasi pelaksanaan pelatihan. Hasil dari kegiatan ini adalah adanya peningkatkan pengetahuan serta wawasan siswa dalam hal pembuatan rangkaian papan iklan dot-matriks menggunakan komponen elektronika, memahami kode program, menjalankan program arduino Integrated Developement Environment (IDE), melakukan simulasi pada rangkaian menggunakan mikrokontroler arduino serta siswa telah berhasil mendemonstrasikan dan menjalankan panel running text yang telah dibuat dengan menggunakan smartphone android.