Article Per Year (5 Year)
p-Index From 2021 - 2026
0.61
P-Index
This Author published in this journals
All Journal Komunikasi Fisika Indonesia Science, Technology, and Communication Journal
Erwin Amiruddin
Department of Physics, Universitas Riau, Pekanbaru 28293, Indonesia
Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Magnetic susceptibility, composition, and morphology of iron oxide particles resulting from ball milling of natural sand in the Rokan River Elfitah Ramadhani Triana; Salomo Salomo; Erwin Amiruddin; Rahmondia Nanda Setiadi
Indonesian Physics Communication Vol 21, No 2 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.2.121-126

Abstract

The magnetic susceptibility value and alterations in the composition and dimensions of iron oxide particles in the natural sand from the Rokan River, which were prepared using ball milling (BM), have been measured. Prior to undergoing the BM procedure, the sample's magnetic and non-magnetic particles are initially separated using an iron sand separator and a neodymium iron boron magnet. Subsequently, a 120-gram sample was obtained and subjected to the initial stage of BM for a duration of 80 hours, resulting in the formation of a product referred to as BM1. Next, product BM1 undergoes a second stage of BM with an extended duration of 30, 40, and 50 hours. The resulting products are termed BM2A, BM2B, and BM2C, respectively. The milled balls utilised were a total of 16 combined iron balls with a diameter of 2 cm, 32 combined iron balls with a diameter of 1.5 cm, and 64 combined iron balls with a diameter of 0.7 cm. The findings indicated a positive correlation between the duration of BM rotation and the magnetic susceptibility value. Specifically, the value increased from 11,361.6 in BM1 to 12,398.7 in BM2A, 13,383.4 in BMB, and 14,541.2 in BM2C. The XRF test findings also indicated an increase in the fraction of the magnetic element, Fe, from 38.113% in BM1 to 40.133% in BMA, 41.629% in BM2B, and 42.478% in BM2C. The SEM test findings indicated a decrease in the average particle size of the samples from 696 nm to 401, 356, and 288 nm.
Decomposition and estimation of gauge transformation for Chern-Simons-Antoniadis-Savvidy forms Suhaivi Hamdan; Erwin Amiruddin
Science, Technology, and Communication Journal Vol. 2 No. 3 (2022): SINTECHCOM Journal (June 2022)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i3.9

Abstract

Cartan's extended homotopy formula is set to obtain the Chern-Simons-Antoniadis-Savvidy (ChSAS) measurement form transformation. This indicates a change in each of the results that the quasi-invariance nature of the gauge with a closed shape under the meter transformation. The results of the initial calculation of the ChSAS form then show a singlet anomaly for each value of n as a dimension variation. These results have illustrated the relationship with the Chern-Simon form theory. The results of the final calculation of the ChSAS shape on the gauge transformation are then described in relation to the Zumino anomaly which reaches an anomaly variation that depends on the p and n terms.
Schrödinger's equation as a Hamiltonian system Suhaivi Hamdan; Erwin Amiruddin
Science, Technology, and Communication Journal Vol. 3 No. 1 (2022): SINTECHCOM Journal (October 2022)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v3i1.221

Abstract

This article describes the concept of the time-dependent Schrödinger equation (TDSE) as a review to add a detailed understanding of the steps to formulate TDSE which can be seen from the classical mechanic's concept as a mechanical wave function. In this article, a comprehensive approach to the concepts of momentum and energy in particles will be described using operators working on wave functions. The results show that the use of momentum and energy operators can show that TDSE is a Hamiltonian system.
Co-Authors Elfitah Ramadhani Triana Rahmondia Nanda Setiadi Salomo Salomo Suhaivi Hamdan