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Asean Journal of Science and Engineering (AJSE)

AJSE
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Published by Universitas Pendidikan Indonesia

ISSN : 27766098 EISSN : 27765938 DOI : https://doi.org/10.17509/ajse.

Core Subject : Science, Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Engineering Materials Science & Nanotechnology

ASEAN Journal of Science and Engineering (AJSE) promotes research in the broad field of science and Engineering Education (including such disciplines as Agriculture Education, Environmental Science Education, etc.) with particular respect to Indonesia, but not limited to authorship or topical coverage within the region. Contributions are expected from senior researchers, project managers, research administrators and PhD students at advanced stages of their research, representing both public organizations and private industry. Equally, the journal if intended for scholars and students, reseachers working at research organizations and government agencies, and also for enterprises undertaking applied R&D to lead innovations. The editorial contents and elements that comprise the journal include: Theoretical articles Empirical studies Practice-oriented papers Case studies Review of papers, books, and resources. As far as the criteria for evaluating and accepting submissions is concerned, a rigorous review process will be used. Submitted papers will, prior to the formal review, be screened so as to ensure their suitability and adequacy to the journal. In addition, an initial quality control will be performed, so as to ensure matters such as language, style of references and others, comply with the journal´s style. The below mentioned areas are just indicative. The editorial board also welcomes innovative articles that redefine any Science and Technology field. Chemistry and Chemical Engineering Physics, Material, and Mechanical Engineering Biology, Biological and Bio System Engineering Food and Agriculture Engineering Mathematics Computer Science and Engineering Earth Science and Engineering Space Engineering Electrical Engineering Architecture and Civil Engineering Environment Science and Engineering Basic Science in Engineering Engineering Reforms New Technologies Industry and Education: A Continous Collaboration Research and Development in Engineering Globalisation in Engineering Women in Engineering Computers, Internet, Multimedia in Engineering Organization of Laboratories Agricultural Bio Systems Engineering Mechanical Engineering Electric and Electronic Engineering Civil Engineering and Architectural Engineering

Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)

Articles 98 Documents

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QZSS L1 Bandwidth Frequency Filter Design for QZSS Receiver Narumol Onanong; Julongkorn Pattameak; Teerachet Mekpradab; Surachet chinnapark; Prasert Kenpankho
ASEAN Journal of Science and Engineering Vol 1, No 1 (2021): AJSE: March 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

We present the design of bandpass filter on the frequency of the QZSS satellite, by providing bandwidth at the cut-off frequency equally to the bandwidth of the QZSS L1 with selecting the response characteristic on Butterworth maximally flat amplitude. Bandpass filter design using frequency of the QZSS L1 with bandwidth is 24MHz. The design procedure involves two steps, the first step is to find the required order of the filter, which we use 3rd order, and the second step is to find the scale factor that must be applied to the normalized parameter values. The Band-Pass Butterworth filler is a combination between low pass and high pass. For the Butterworth filter, the value of a resistor that has been used are 50Ω. Then go to find the capacitor and inductor and by using PSpice as the tools for the simulation. The results of the output of bandpass filter at -3dB was between 1563 and 1587MHz. And was bandwidth around 24MHz. The combination of the lowpass filter and high pass filter is to perform as the bandpass filter. Therefore, there are two combinations also in designing bandpass filter. The aim of this combination is to have an influence on the performance of bandpass filter. As a conclusion, this designed filter on the frequency of QZSS L1 is to be useful by using bandpass filter.

How to Calculate Crystallite Size from X-Ray Diffraction (XRD) using Scherrer Method Siti Fatimah; Risti Ragadhita; Dwi Fitria Al Husaeni; Asep Bayu Dani Nandiyanto
ASEAN Journal of Science and Engineering Vol 2, No 1 (2022): AJSE: March 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

X-Ray Diffraction (XRD) has been developed to analyze a crystal structure in the material. XRD is then improved for determining and identifying the presence of a compound, crystallinity, and crystal properties. XRD works by observing the ray refraction pattern as a result of the beam being refracted by a material that has an atomic arrangement in its crystal lattice. Until now, there is less information regarding detailed information on how to read the XRD spectrum and peak. This study aims to demonstrate how to calculate and interpret the crystallite size based on the XRD spectra. The step-by-step method in the calculation based on the XRD data is presented, which can help especially students and first-time users in understanding XRD results. This study is prospective to be used as standard information on how to read and interpret XRD spectra.

Potential Production of Bioplastic from Water Hyacinth (Eichornia crassipes) Apzelia Angel Duruin; Xylthea Faith Lalantacon; Jorge Gabriel Leysa; Rogelio Lucero lll; Ralph Adrian Obena; Alisha Sapal; Merlyn Leysa; Anamarie Valdez; Hassanal Abusama
ASEAN Journal of Science and Engineering Vol 2, No 2 (2022): AJSE: September 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

The purpose of this research was to determine the potential and capability of water hyacinth (Eichornia crassipes) as bioplastics. The produced bioplastic was naturally biodegradable and can be used for natural conservation without environmental destruction. The study was experimental using various compositions of water hyacinth, characterized by tensile strength and biodegradability tests to determine the potentiality and capability of water hyacinth as a source of bioplastic. In making the bioplastic, we extracted the water hyacinth and utilized glycerine as a plasticizer, water as the solvent, corn-starch as a thickener, and vinegar. After mixing all materials on a pan, the mixed solution was placed on a stainless surface and dried. After a 3-day curing period, the results showed that different mechanical and decomposition properties were obtained. Based on the results of the study, water hyacinth is one of the suitable materials that can be used to produce a new and sustainable bioplastic material. It is organic and accessible, thus making it a candidate for innovation in the creation of bioplastic. Therefore, we believe that the use of water hyacinth is a potential bioplastic material that is beneficial to the environment and the community.

Object Detection for Autonomous Guided Vehicle Tanmay Bhosale; Ajim Attar; Prathamesh Warang; Randhir Patil
ASEAN Journal of Science and Engineering Vol 2, No 3 (2022): AJSE: December 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

In recent years camera networks have been widely used in several applications such as surveillance, video conferencing, etc. The autonomous vehicle can reduce critical fatalities and injuries. Thus, an autonomous vehicle is the solution to this eliminating the possibility of human error and drastically changing the danger associated with the motor. In the rural environment, a lack of accuracy and estimation of the vehicle can be observed since the roads are not well constructed, however, in an urban area, it is very easy to detect landmarks on roads. The joint observation model is used for compensating the error of individual observations and the state of the vehicle. The purpose of this paper is to present the design of an obstacle detection system using LIDAR for an autonomous guided vehicle. LIDAR is mostly used in an autonomous vehicle to detect obstacles. It provides the exact location of obstacles in front of the vehicle. The main motto of using the LIDAR camera is to detect obstacles and send data to the controller. The Observational-Experimental methodology was used for this research. It controls the speed of the vehicle, emergency braking when an object is being detected. An autonomous vehicle system with LIDAR can be used on one-way or two-way roads and it is widely used for industrial purposes. The autonomous vehicle is useful for one-way or two-way roads. The aim of the obstacle detection system is it reduces accidents on road and reduce human power.

Foldable Bed Design Concept for COVID-19 Patient: A Machine Design Case Study Laely Muryanti; Laela Nur Fitria; Glenn Hanaya; Farid Triawan
ASEAN Journal of Science and Engineering Vol 1, No 2 (2021): AJSE: September 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Coronavirus disease 2019 (COVID-19) has become a serious problem around the world. The pandemic has given several bad impacts, especially in the medical operation. Hospitals are facing problems in which they are lacking the patient bed facility. The objective of this paper is to propose an adjustable medical bed that can be folded as a chair for COVID-19 patients. This foldable bed is employing the hydraulic system as the lifting mechanism. It can raise up from 0.62 to 1 meter height and withstand loads up to 400 kg. Other supporting features and mechanisms will be explained in this paper. Furthermore, the theoretical strength analyses of this proposed design are conducted under the static and fatigue loading. In the static analysis, the safety factor due to the normal and shear stress is 7.5 based on the Maximum Shear Stress failure criterion theorem. Meanwhile, in the fatigue analysis, the safety factor based on the Modified Goodman and ASME-Eliptic criteria are 3.6 and 3.9, respectively. The infinite life of this design is predicted. In addition, this paper is expected to be used as a reference for developing a more reliable design for COVID-19 patients due to lack of bed facilities.

Contributing Factors Impacting Project Successfulness Tanmay Bhosale; Aniket Pawar; Anagha Shinde
ASEAN Journal of Science and Engineering Vol 2, No 2 (2022): AJSE: September 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

This research paper comprises three different case studies taken under consideration and involves a step-by-step analysis of all three. The analysis of these case studies is based on the fundamentals of Project Management Techniques and the way it was implemented by the Project Managers during the different phases of the project to achieve success. The purpose of this research is to study the projects which avoided failure even at the toughest times and proved any project can be successful if managed and executed with proper project management techniques. The methodology used for conducting this research was Interview methodology aligned with the Case study approach. Project Managers of the mentioned projects were interviewed to accumulate accurate and authentic information to analyze, discuss and reach conclusion. Overall, the reason behind the study is to demonstrate that under appropriate guidance by project managers and the use of relevant project management techniques, factors leading to project failure could be identified and mitigated to ensure success.

Illizi city sand impact on the output of a conventional solar still Djamel Khamaia; Ridha Boudhiaf; Abderrahmane Khechekhouche; Zied Driss
ASEAN Journal of Science and Engineering Vol 2, No 3 (2022): AJSE: December 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Lack of drinking water is a global problem and especially in overdeveloped countries. this is why many research laboratories are focused on solving this problem. one of the simplest, economical, and environmental methods is the use of conventional solar stills. Sand from the city of Illizi in southern Algeria was used in our research to see how it affected solar distillation. So, with a dimension of (0.50 x 0.50 m), two identical solar stills were evaluated, one as a solar still reference (SSR) and the other as a solar still modified (SSM). The SSM contains sand. The findings reveal that there is no discernible difference in performance and that the improvement rate is extremely low, at 0.67 %.

The Efficient Implementation of Hybrid Power Plants in Indonesia Farhan Perdiansyah; Eka Tiara Nur Fitriana; Nur Aziema; Permata Putri Maharani; Fitri Khoerunnisa; Nanang Winarno
ASEAN Journal of Science and Engineering Vol 1, No 3 (2021): AJSE: December 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

The energy crisis is a serious issue that all countries around the world are dealing with, particularly the energy sources used to generate electricity. There are numerous alternative energy sources available in nature, such as solar energy, wind energy, and so on. Wind and solar energy as hybrid energy sources are thought to be promising in electric generation technology. Hybrid Power Plants can also be used to address the issue of limited electrical energy supply in Indonesia's remote areas. The purpose of this study is to describe the effectiveness of the hybrid power plants implementation in Indonesia. The study was conducted using the narrative literature review method. It can be inferred that the purpose of developing this hybrid technology, among others, is to obtain more efficient electrical energy generation by combining the advantages of two or more types of power generation systems that work in an integrated manner as a compact system. The produced electric energy can be stored in the battery. In terms of use, the produced direct current (DC) is converted into alternating current (AC) using the inverter system prior to distribution to consumers. Therefore, this hybrid power plant is suitable to be implemented in Indonesia.

Bignay (Antidesma Bunius) Leaf Extract Stands as an Organic Pesticide against Rice Black Bugs (Scotinophara Coarctata) Jeune Aiyana Zophie Latiza; Ashley Claire Pasawilan; Goji Gacoscos; Dave Lesther Bangeles; Charles Godwin Caas; Anamarie Valdez; Hassanal Abusama
ASEAN Journal of Science and Engineering Vol 2, No 1 (2022): AJSE: March 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

This research aimed to sought solutions to the growing problems of rice black bugs (Scotinophara coarctata) damaging the rice crops of farmers. This study used an experimental method to determine which solution is effective against rice black bugs. Bignay (Antidesma bunius) leaves were collected, cut, soaked in water, crushed using a mortar and pestle, and extracted using a thin cloth. The extracts of the leaves were then placed in 4 different concentrations in bottles. 6 bugs were soaked in each solution, respectively, but with different periods (3, 5, and 10 min). We found that the extract is lethal towards black bugs since it has anti-bacterial activity, even though it damaged the rice crops. Bignay fruit was intended to be utilized as another variable, but due to the weather, fruits were not yet visible in the Bignay tree. We concluded that the thickness of the solution served as the main reason why the rice black bugs died. The result of this study can be utilized to address the rising problems caused by rice black bugs.

The Design, Construction, and Expert Appraisal of A 220v Inverter Omotayo Olabo Obielodan; Amos Ochayi Onojah; Olayinka Blessing Iyiola; Adenike Aderogba Onojah; Simon Ayoola Taiwo
ASEAN Journal of Science and Engineering Vol 1, No 3 (2021): AJSE: December 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

This project is about the design and construction of a 220 volts inverter at a frequency of 50Hz. The device is constructed with locally sourced components and materials of regulated standards. The basic principle of its operation is a simple conversion of 12V DC from a battery using integrated circuits and semiconductors at a frequency of 50Hz, into a 220V AC across the windings of a transformer. A battery charger is used to charge the battery using an intelligent digital display charger. This project (device) offers a better alternative to Public Power Supply, Generators as well as UPS considering it is cost-effective, noiseless, and easy maintainability. It was concluded that the inverter was constructed with considerable cost, available and reliable components rather than the more exorbitant unavailable ones. It was however recommended that the Government at various levels should encourage engineering practice by financing and training engineering within and outside the country for the benefit of the students and the nation at large.

Page 3 of 10 | Total Record : 98

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Editorial Team

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Google Scholar

Contact Name
Asep Bayu Dani Nandiyanto

Contact Email
nandiyanto@upi.edu

Phone
+62225000279

Journal Mail Official
ajse@upi.edu

Editorial Address
JL. Setiabudhi No. 229 Bandung, 40154 Jawa Barat - Indonesia

Location
Kota bandung,

Jawa barat

INDONESIA

Abstract

Abstract

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Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Asep Bayu Dani Nandiyanto

Contact Email nandiyanto@upi.edu

Phone +62225000279

Journal Mail Official ajse@upi.edu

Editorial Address JL. Setiabudhi No. 229 Bandung, 40154 Jawa Barat - Indonesia

Location Kota bandung, Jawa barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Asep Bayu Dani Nandiyanto

Contact Email
nandiyanto@upi.edu

Phone
+62225000279

Journal Mail Official
ajse@upi.edu

Editorial Address
JL. Setiabudhi No. 229 Bandung, 40154 Jawa Barat - Indonesia

Location
Kota bandung,

Jawa barat

INDONESIA