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Irza Sukmana
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Journal of Applied Science, Engineering and Technology (J. ASET)
Published by INSTEP Publishing
ISSN : 27228371     EISSN : 27228363     DOI : https://doi.org/10.47355/aset
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering
J.ASET is published by INSTEP Publishing Indonesia and it focuses on all subjects in engineering, applied sciences, and vocational studies, they are including but not limited to: Mechanical and Manufacturing Industrial Engineering Chemical and Environmental Engineering Computer and Information Technology Electrical and Telecommunication Material and Mining Civil Engineering Architecture and Urban Planning Geophysics and Geodetic Engineering Vocational Engineering Studies Mathematics and Applied Sciences Medical Science and Biomedical Engineering Agricultural Engineering and Technology Interdisciplinary research
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 6 Documents
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Search results for , issue "Vol. 2 No. 1 (2022): June 2022" : 6 Documents clear
Identification of Landslide Potential Area Based on UAV Data Analysis at Pidada Village Bandar Lampung City, Indonesia Aldika Rizkiano; Muh Sarkowi; Rahmat Catur Wibowo
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.22

Abstract

Landslide is a natural disaster caused by activities or processes that disrupt the balance that causes the movement of soil and rock masses from high areas to low areas. To avoid high losses due to the disaster hazard, efforts are needed to minimize one of them by mapping areas of potential landslide disasters. This study aims to obtain the zone of potential landslide disaster area based on the data of slope class, rainfall and regional geology of the research area. The results of processing based on DTM (Digital Terrain Model) obtained slope classes, namely flat (0° – 2°) 19.36%, undulating slope (2° – 4°) 30.65%, undulating-rolling slope (4° – 8°) 19.72%, rolling-hilly slope (8° – 16°) 16, 4 %, hilly-steeply dissected slope (16° – 35°) 8.03%, steeply dissected-mountainous slope (35° – 55°) 4.58%, and mountainous slope (>55°) 1.27 %. Based on the analysis of slope class data, annual rainfall data and regional geological maps, there are potential landslide areas with areas marked with orange to red color symbols with a total area of ​​0.866 ha with hilly-steeply dissected slope (0.501 ha), steeply dissected-mountainous slope (0.286 ha) and mountainous slope (0.079 ha). The rainfall is 2800 – 3200 mm/year, and the regional geology is dominated by tuff.
The Effect of Holding Time Artificial Aging on Hardness and Microstructure of Al-2024 Zulhanif Zulhanif; Dedy Rizaldy; Harnowo Supriadi
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.23

Abstract

This study aims to determine the effect of holding time artificial aging on the hardness and microstructure of Al-2024. This study used a specimen in the form of Aluminum 2024 series which was heat treated at a temperature of 500°C for 60 minutes, then quenched with a cooling medium in the form of water. Subsequently, it was reheated with variations in holding time, namely 3 hours, 5 hours and 7 hours with a temperature of 190°C. Then the specimen is slowly cooled to room temperature. The results of the chemical composition test using Spectromax showed the percentage of Al was 90.6% and Cu was 5.90%. The results of the hardness test using the Rockwell Hardness Tester obtained a hardness value without heat treatment which has a hardness value of 71.4 (HRB), a hardness value after quenching of 66.9 (HRB). The highest hardness value is found in heating with a holding time variation of 5 hours with a temperature of 190°C, the hardness value is 84.6 (HRB) where the hardness value at a holding time of 5 hours has increased by 8.48% from the hardness value of the material without heat treatment. Microstructure testing showed that the Al-Cu material after the artificial aging process at a holding time of 5 hours had a precipitate phase (θ) with a higher amount and the Al-Cu grain boundaries tended to be more dense and regular. This means that the material that has been treated with artificial aging has precipitated deposits or the formation of a second phase which causes the material to be harder and have better mechanical properties.
The Coagulation-flocculation Process of the Liquid Waste Treatment Plant at a Diagnostic Center in Yogyakarta, Indonesia Doddy Irawansyah; Muhammad Hanif; Sugiyanto Sugiyanto; Dikpride Despa
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.26

Abstract

The study aimed to obtain the optimum dose of Al2(SO4)3 coagulant, which would be added to the coagulation-flocculation process to redesign a liquid waste treatment plant at a diagnostic center in Yogyakarta, Indonesia. The redesign aims to reduce the content of Chemical Oxygen Demand (COD) contaminants based on Provincial Decree number 65/Y1999 which concerns the Liquid Waste Quality Standards for Health Service Activities in the Province of the Special Region of Yogyakarta. The case was studied at the diagnostic center on Dr. Soetomo street, Bausasran Village, Yogyakarta City. The research method used is quantitative, with data collection techniques in the form of primary and secondary data through survey activities on the research objects in the field. The test and analysis were carried out at the environmental laboratory in Yogyakarta. Based on the jar-test analysis, the redesign process may significantly decrease the COD pollutant from 471.94 mg/liter to 140.763 mg/ liter or 70.17%. By getting the optimum dose of the Al2(SO4)3 coagulant. 
The Development of a Microcontroller Circuit Board for Practical Engineering Work Nor Winda Binti Ismail; Mohd Sallehin Bin Abasb
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.28

Abstract

The Embedded System Application is a compulsory course for the Diploma Program in Mechatronic Engineering at Kota Kinabalu Polytechnic, Sabah. The microcontroller used for this course is the PIC16F877A PIC microcontroller. In this course, continuous assessment is tests, quizzes, the end of the chapter, and practical work. The biggest assessment percentage in this course is practical work which is 40 percent. In this course, students begin practical work by assembling all components manually, from the power supply circuit to the microcontroller circuit on the breadboard. It takes a long time for students to prepare the basic circuit each time before starting the practical work. Often, students will face errors in assembling the circuit and take time to troubleshoot and identify the problem. There is also a component failure because of assembling and disassembling the circuit. This paper presented the development of prototype board PIC16F877A to facilitate students to do practical work effectively to save time and energy and lower cost.
Modification of the Traditional Inkjet Printer for Printing a Three-Dimensional (3D) Tissue Engineered Human Cell-Matrix System Al Tayasneh M Abd Alkarim; Irza Sukmana; Fadil Hamdani; Bassem Abu Zneid
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.32

Abstract

Bioprinting has grabbed attention in recent years. To study the behavior of living organisms on the basic level, bio-medical engineers have introduced bioprinting as a cheap and affordable method to construct and fabricate tissues using cells and positioning methods along with cell culture techniques. The applications such as the use of perfused three-dimensional (3D) human cardiac tissues for toxicological research, drug testing, and screening or personalized medicine. Moreover, it helps to develop in-vitro tissue test systems, with which one can explore basic cellular behaviors, disease progression, and treatment options. A standard thermal inkjet printer was modified to accomplish the bioprinting. Cell viability was determined. We made two types of printing 3D and 2D. The 3D printing is much closer and mimics the in vivo condition and allows more cells to be printed per unit space.
Cover and Front Matter June 2022 jicstar jicstar
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.34

Abstract

Cover and Front Matter June 2022

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