cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Alam Budiman Thamsi
Contact Email
alam.budiman7@gmail.com
Phone
-
Journal Mail Official
insightpublisher.com@gmail.com
Editorial Address
Perumahan Bumi Tamalanrea Permai (BTP), Blok L, No. 2, Makassar, South Sulawesi Provice, Indonesia
Location
Kota makassar,
Sulawesi selatan
INDONESIA
Journal of Engineering Science and Technology Applications
Published by CV. Insight Publisher
ISSN : -     EISSN : 29884624     DOI : https://doi.org/10.58227/jesta.v1i1
Core Subject : Engineering,
Engineering
Journal of Engineering Science and Technology Applications (JESTA) E-ISSN 2988-4624 is a peer-reviewed journal that aims to publish and disseminate original research articles on the latest developments in all fields of engineering science and technology applications. The journal publishes original papers contributing to understanding engineering science and improving technology and engineering education. The articles can be theoretical (including computational), experimental, or both. Published by Insight Publisher located in Makassar City, Indonesia. JESTA invites researchers, investigators, and students to contribute their studies and research by submitting original articles and not simultaneously submitting articles to other journals or conferences. The journal covers topics related to engineering fields in bioelectrical engineering, electronic engineering, informatics engineering, computer science, mechatronics engineering, mechanical engineering, automotive engineering, construction engineering, industrial engineering, chemical engineering, mining engineering, environmental engineering, engineering, applied technology, and other engineering fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications" : 5 Documents clear
Karakterisasi Fe₂O₃ Hasil Sintesis Hijau Menggunakan Ekstrak Buah Dengen (Dillenia serrata): Characterization of Fe₂O₃ from Green Synthesis Using Dengen Fruit Extract (Dillenia serrata) Nurmalasari; Nurhalima; Suaedi; Bakri, Suriyanto; Putri, Syukrika; Prayitna, Yusri
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v2i2.204

Abstract

Fe₂O₃ has many functions, including as a pigment and as a semi-conductor material. The use of this material depends on its characteristics. In this study, the characterization of Fe₂O₃ nanoparticles produced from green synthesis was carried out. Dengen fruit extract was used as a chelating agent with iron sand raw material from the Pajallesang River, Palopo City. The synthesis was carried out using the sol-gel method at pH 4.7. The gel sample was calcined at temperatures of 600°C, 700°C, and 800°C, after which it was characterized using XRD and XRF. The average crystallite size of Fe₂O₃ particles in iron sand and after being synthesized at temperatures of 600°C, 700°C, and 800°C were respectively 40.09 nm, 36.67 nm, 31.46 nm, and 69.04 nm. The increase in calcination temperature affects the Fe₂O₃ content, where the higher the temperature used, the lower the Fe₂O₃ content obtained. The Fe₂O₃ content in iron sand and after synthesis at temperatures of 600°C, 700°C, and 800°C were respectively 70.4%, 91.04%, 90.01%, and 88.82%
Analisis Uji Emisi Pada Asap Hasil Pembakaran Briket dari Campuran Batubara dan Limbah Plastik LDPE: Emission Test Analysis On Bricket Combustion Smoke From Mixed Coal And LDPE Plastic Waste Asmiani, Nur; Lestari, Ayu; Thamsi, Alam Budiman
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v2i2.206

Abstract

This research was conducted by mixing coal and Low-Density Polyethylene (LDPE) waste. This study aimed to determine the smoke resulting from burning briquettes with a calorific value of 9,187 Kcal/gr. Judging from the emission levels of carbon monoxide (CO), sulfur dioxide (SO2), and nitrogen oxides (NO2), it becomes a consideration for the feasibility of briquettes be produced as alternative fuels, harmful or not for human health and the surrounding environment. They are first testing the quality of the briquettes and the smoke emissions from burning briquettes. From the test results, the sulfur content is 0.01%, the moisture content is 1.15%, the ash content is 10.22%, the volatile matters are 87.76%, and the calories are 9187.64 Kcal/gr. Then the smoke resulting from burning briquettes was tested for emission levels of carbon monoxide (CO), sulfur dioxide (SO2), and nitrogen oxides (NO2). The results obtained with a high value and exceed the maximum standard that has been set by PERMEN ESDM No. 047 of 2006, namely CO 13715 mg/Nm3 and SO 2550 mg/Nm3, while the NO 2 produced does not exceed the maximum standard set by PERMEN ESDM No. 047 of 2006 which is 7 mg/Nm3. Based on the test results, it can be concluded that the briquettes produced have the potential to pollute the environment and are dangerous if inhaled at high levels by humans. The resulting briquettes are also unfit to be produced as an alternative fuel.
Analisis Perbedaan Kadar Nikel Antara Front Penambangan dan Stockpile Pada PT Rockstone Multi Mining Indonesia: Analysis of the difference in Nickel Grade Between the Mining Front and Stockpile at PT Rockstone Multi Mining Indonesia Maulana, Wahyu; Chalik, Citra Aulian; Thamsi, Alam Budiman
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v2i2.207

Abstract

PT Rockstone Multi Mining Indonesia Central Sulawesi is one of the companies that manages laterite nickel ore into ferronickel (FeNi) products. This study aims to determine the percentage of nickel content found in the mining front to the stockpile and to find out what percentage of the change in nickel content from the mining front to the stockpile and analyze the factors of the change in the level from the mining front to the stockpile. This study uses the field observation method. In the mining front data , with a total of 17 domes, the average level of Ni Front of reclamation is 1.91 while the average level of Ni stockpile is 1.90. When summing up the average value of the mining front and stockpile levels , a decrease in nickel content of 0.01% was obtained. The factors that cause changes in nickel levels are waterlogging, dredging of the Stockpile floor, the use of used sacks for samples, unclean buckets, unclean dump truck tubs, sampling errors, and preparation errors.
Studi Kualitas Aspal Buton PT Wijaya Karya Bitumen, Kabupaten Buton, Provinsi Sulawesi Tenggara: Buton Asphalt Quality Study of PT Wijaya Karya Bitumen, Buton Regency, Southeast Sulawesi Province Arham; Bakri, Hasbi; Bakri, Suriyanto
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v2i2.208

Abstract

Utilization of Buton asphalt is not too maximal, it is because the quality of Buton asphalt is considered less favorable than asphalt oil. The aim of this study was to determine the percentage content of bitumen and water content at the mine site and Lawele Kabungka. Methodology The study was entirely based on laboratory data required data¬-related data quality is seen from the Buton asphalt bitumen content and moisture content of the samples taken in the field. In addition, data were also taken from the test results Research and Development Center (PUSLITBANG) Department of Public Works (PU) in the form of data ductility, penetration, flash point, softening point, lose weight, solubility in CCl4 on the content of the asphalt in two locations: Lawele and Kabungka , Based on the results of research conducted in the laboratory PT. Wijaya Karya Bitumen bitumen shows that the average levels for Lawele Buton Asphalt Bulk 28.79% and Lawele (LGA) 29.53%, while in Kabungka with an average of Buton Asphalt Bulk 25.52% and Kabungka (BGA) 26 , 83%. Both locations meet ISO standards, both asphalt in bulk form or in the form of LGA and BGA is 25%. Buton asphalt water content is quite high at the location Lawele (Buton Asphalt Bulk of 13.2%, LGA of 7.93%) and Kabungka (Buton Asphalt Bulk 11.03% BGA 8.9%). The water content of the two locations do not meet the National Standards of Indonesia (SNI) either in bulk form or in the form of BGA and LGA is constant below 2%.
Perilaku Lentur Kolom yang Diretrofit Menggunakan Wire Mesh dan Self Compacting Concrete Akibat Beban Siklik: Flexural Behaviour of Retrofit Column Using Wire Mesh and Self Compacting Concrete Due to Cyclic Load Satar, Syahrul; Limbongan, Joey; Firman, Risman; Febry Fitriani Sofyan, Yanny; Tamsil Yunus, Ahmad; Munadrah; Widiasari Maruddani, Andi
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v2i2.209

Abstract

Results of experimental and analytical study of the flexural behavior of retrofitted columns using wiremesh and SCC concrete due to cyclic loading. The purpose of this study was to analyze the strength of the column retrofitted using wiremesh and SCC due to cyclic loading. The test object consisted of 3 columns with a size of 300x300 mm, consisting of a control column (KK), a total reinforcement column (KR-1) and a reinforcement column in the approximate plastic hinge region (KR-2). From the test results, the flexural strength of the reinforced column is higher than that of the unreinforced column. The rate of increase in strength of KR-1 compared to KK is 46.68% in compression and 37.87% in tension. The rate of increase in the strength of KR-2 compared to the compressive load of KK is 41.71%, and the tensile load is 32.35%.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2024 2024


Reset
Filter By Issues
All Issue Vol. 3 No. 2 (2025): Journal of Engineering Science and Technology Applications Vol. 3 No. 1 (2025): Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): Journal of Engineering Science and Technology Applications Vol. 2 No. 1 (2024): Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications