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International Journal of Advances in Applied Sciences
Published by Institute of Advanced Engineering and Science
ISSN : 22528814     EISSN : 27222594     DOI : http://doi.org/10.11591/ijaas
Core Subject : Science, Education, Social,
Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Mathematics Physics
International Journal of Advances in Applied Sciences (IJAAS) is a peer-reviewed and open access journal dedicated to publish significant research findings in the field of applied and theoretical sciences. The journal is designed to serve researchers, developers, professionals, graduate students and others interested in state-of-the art research activities in applied science areas, which cover topics including: chemistry, physics, materials, nanoscience and nanotechnology, mathematics, statistics, geology and earth sciences.
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Articles 31 Documents
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Search results for , issue "Vol 14, No 1: March 2025" : 31 Documents clear
Fuzzy analytic hierarchy process for analysis of barriers to halal supply chain adoption in Indonesia Utama, Dana Marsetiya; Bahtiar, Ardi Agustia
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp268-275

Abstract

The increasing awareness of the importance of halal certification has prompted companies to evaluate the barriers to adopting the halal supply chain. While this adoption has the potential for significant benefits, various barriers must be investigated. This study examines the barriers to adopting halal supply chains in small and medium-sized food enterprises (SMEs). The fuzzy analytical hierarchy process (fuzzy AHP) assesses and weighs the 30 identified barriers. The results showed that the main barriers to adopting a halal supply chain include understanding and awareness of the importance of halal certification, support from the government and related institutions, and companies' internal readiness to implement halal standards. In addition, other significant barriers were high certification costs, lack of funds to promote the halal industry, lack of willingness to adopt and implement halal in the supply chain, and lack of technology costs to manage supply chain processes by halal standards. The implications of this study suggest the need for better support strategies from the government and relevant agencies, as well as awareness and understanding-raising efforts among SMEs to overcome these barriers and facilitate the adoption of halal supply chains.
Illuminance study of lecture rooms and laboratories in an educational academic building based on the MS 1525 standard Zainal, Muhammad Asyraf; Ghani, Sharin Ab; Chairul, Imran Sutan; Khiar, Mohd Shahril Ahmad
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp193-199

Abstract

The lighting system is a crucial system in classrooms and other educational facilities such as laboratories and sports centers. Poor lighting conditions will affect the ability of the students to see clearly during classes and result in eye strain, fatigue, headache, and stress. Hence, this study aims to investigate the illuminance levels in four lecture rooms and six laboratories in the Faculty of Electrical Technology and Engineering, Universiti Teknikal Malaysia Melaka, Malaysia using DIALux evo 10.0 lighting design software. The illuminance levels determined from simulations were compared with the required illuminance levels for classrooms (300 lx) and laboratories (500 lx) stipulated in the Malaysian standards (MS) 1525-energy efficiency and use of renewable energy for non-residential buildings. Based on the results, the selected lecture rooms were overlit, whereas three of the laboratories were underlit. Suggestions were made to improve the illuminance levels of the lecture rooms and laboratories by changing the specifications of the lighting system or by making use of natural sunlight from the windows.
Design of a miniaturized patch antenna for 2.45/5.8 GHz applications Laabadli, Abdel-Ali; Mejdoub, Youssef; Elamri, Abdelkebir; Tarbouch, Mohamed
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp101-110

Abstract

A miniaturized antenna for 2.45 and 5.8 GHz applications is presented in this paper. The designed antenna is based on two metamaterial unit cells which resonate at 2.45 and 5.8 GHz. They are etched on the ground plane of the conventional patch antenna that resonates at 3.38 GHz. The substrate and metal chosen in this design are respectively, Epoxy FR-4 (with permittivity 4.4, loss tangent of 0.025, and thickness of 1.6 mm) and copper annulled. The simulation of the antenna was done with a CST solver. The proposed miniaturized antenna has two main bands: the inferior band 2.45 GHz and the superior band 5.8 GHz. On the inferior band, the gain and bandwidth are 1.39 dB and 76.4 MHz, and on the superior band, they are 2.05 dB and 160 MHz.
Microbiological and physics testing encapsulation of Lactobacillus plantarum with kepok banana flour Legowo, Anang Mohamad; Pramono, Yoyok Budi; Hintono, Antonius; Setiani, Bhakti Etza; Nabila, Aulia Zalfa; Handoko, Nisfa Rama Kamila
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp19-27

Abstract

Kepok banana flour (KBF) contains fructo-oligosaccharides (FOS) which can stimulate the growth of Lactobacillus plantarum bacteria in the digestive tract. The encapsulation technique is done to maintain the viability of probiotic bacteria from environmental conditions by packaging using coating materials like skim milk and maltodextrin. This research aims to determine the effect of adding KBF with different concentrations on Lactobacillus plantarum encapsulates. The research design used was a completely randomized design (CRD) with 5 treatments and 4 replications. The treatment given was a concentration of KBF of 0, 2, 4, 6, and 8%. The results obtained were a lactic acid bacteria (LAB) viability value of 8.72 Log CFU/g-9.16 Log CFU/g, a pH value of 6.55-6.43, yield value of 23.39%-23.43%, color of 3.36-3.12, aroma of 2.80-2.88, texture of 3.08-2.92, and overall, 3.12-3.36. The addition of 8% KBF can increase LAB viability, color, and texture, but reduces the pH value, yield, and aroma of Lactobacillus plantarum encapsulates and produces a well-encapsulated microcapsule morphology.
Evaluation of 6 MV photon beam characteristics on Varian Clinac iX: a Monte Carlo study Manik, Josua Timotius; Okselia, Anisza; Junios, Junios; Margaretha, Angelica; Haryanto, Freddy
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp227-234

Abstract

This work aims to study the characteristics of photon beams through phase space file (PSF) analysis using Monte Carlo (MC) simulation. 6 MV photon beams from the Varian Clinac iX were simulated using PRIMO software. The beam parameters were validated by evaluating the percentage depth dose and dose profile. A full PSF was scored at the downstream end of the linear accelerator (LINAC) upper and lower parts and analyzed to determine the beam fluence profile, energy fluence profile, angular distribution, and spectral distribution. The results show that within PSF 1, the photon beam has an average scattering angle of 10.74° and a mean energy of 1.18 MeV. In PSF 2, the average scattering angle decreases to 2.63° while the mean energy increases to 1.50 MeV. The field size variation at 20×20, 30×30, and 40×40 cm2 affects both the angular and spectral distribution of the photon beam. The photon beam in PSF 2 exhibits an average scattering angle of 4.56, 6.31, and 6.66°, with corresponding mean energy values of 1.40, 1.32, and 1.30 MeV, respectively. These findings show that as the field size increases, the photon beam scatters at a larger angle while the energy decreases.
Stock’s selection and trend prediction using technical analysis and artificial neural network Agung, Ignatius Wiseto Prasetyo; Arifin, Toni; Junianto, Erfian; Rabbani, Muhammad Ihsan; Mayangsari, Ariefa Diah
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp151-163

Abstract

Stock trading offers potential profits when traders buy low and sell high. To maximize profits, accurate analysis is essential for selecting the right stocks, timing purchases, and selling at peak prices. The authors propose a new method for selecting potential stocks that are highly likely to rise in price. The method has two stages. First, technical analysis, using moving averages and stochastic oscillators, filters stocks with downward trends, anticipating a reversal and subsequent rise. Second, for selected stocks, future price trends are predicted using artificial neural networks, specifically long short-term memory (LSTM) with adaptive moment estimation (Adam) optimizer. The second step ensures that only stocks with increasing prices will be chosen for trading. This study analyzes five hundred Fortune 500 stocks over three different periods, with 250 days of data each. Simulations conducted in Python showed that technical analysis could filter 5 to 6 candidate stocks. Subsequently, the LSTM model predicted that only 4 of these stocks would have an upward trend. Validation shows that trend predictions are correct, resulting in an average profit of 5.51% within 10 working days. This profit outperforms the profits generated by other existing methods.
Battery temperature monitoring system using Arduino Srujana, Boddireddy; Chenchireddy, Kalagotla; Sujatha, Muthumula; Sultana, Waseem; Ahmed Sydu, Shabbier; Giddalur, Eswaraiah
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp53-59

Abstract

Energy storage technologies are playing a key role in the modern world. The energy storage technologies are battery and ultracapacitors. This paper presents designing and implementing an Arduino-based battery temperature monitoring system for real-time battery temperature monitoring in a variety of applications, including industrial equipment, renewable energy systems, and electric cars. An Arduino microcontroller, temperature sensors, and optional display and communication modules make up the system. The Arduino receives temperature data from the sensors and processes it to provide information, send out alerts, and log data for further analysis. The technology provides an affordable and adaptable way to guarantee both the safety and best possible performance from batteries.
Binary relaxor piezoceramic Pb (Mg1/3Nb2/3) O3-PbTiO3 for energy harvesting Bhoi, Bomkesh; Purohit, Pranati
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp276-281

Abstract

Perovskite relaxor-PT piezoelectrics are suitable materials for energy harvesting. Relaxor-PT crystals have electromechanical properties that can replace lead zirconate titanate (PZT). However, the growth of these relaxor-PT crystals is tedious and expensive. The important parameter for energy harvesting is the transduction rate (d×g) where d represents the piezoelectric coefficient and g represents the piezoelectric voltage constant. There is always a challenge to obtain a high (d×g) value. Lead magnesium niobate Pb (Mg1/3Nb2/3) O3-lead titanate PbTiO3 (PMN-PT) is a binary relaxor-PT ceramic and the morphotropic phase boundary (MPB) of (1-x) PMN-xPT ceramics occur around x=0.29-0.40 which is not exactly defined. So here we have synthesized 0.71PMN-0.29PT, 0.68PMN-0.32PT, and 0.65PMN-0.35PT compositions by two-step sintering solid-state method. The x-ray diffraction (XRD) patterns of the PMN-PT ceramics exhibit a characteristic perovskite structure and also show that PMN-PT ceramics fall within the region of MPB. Out of the three compositions, the 0.71PMN-0.29PT ceramics show a higher transduction rate (d×g). So, this piezoelectric ceramic has the potential to replace costly piezoelectric single crystals in the creation of affordable, high-frequency energy harvesting devices.
Big data assisted eco-learning environment framework for inclusive education Soon, JosephNg Poh; Lanlan, Pan; Ji, Yuehua; Luo, Jinxia; Yuen, Phan Koo; Donghui, Xie
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp200-208

Abstract

Big data is profoundly changing education under inclusive education. Classroom interaction, a vital component in education, is gaining increased emphasis, driving research into learning environments that better meet interaction needs. Therefore, exploring the construction of a big data-assisted eco-learning environment for classroom interaction is a prospective study. This research focuses on constructing a big data-assisted ecological learning environment based on affordance theory. It examines the relationship among learning environment, classroom interaction, and learning outcomes, using SmartPLS for validation. Through controlled experiments, surveys, teacher-student interaction analysis, and interviews, the study explores learner behavior data. Findings show the big data-assisted eco-learning environment enhances English classroom interaction, thereby further improving learning outcomes, across dimensions like learning space, resource accessibility, technical support, and emotional support. Integrating big data with ecological theory offers insights into educational digitization, supporting flexible classroom interaction, and promoting education equity, inclusivity, and sustainable education through data-driven resource management.
Designing business architecture for machinery distribution company using the open group architecture framework method Ananda, Vincent Ray; Lee, Francka Sakti; Breliastiti, Ririn
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i1.pp185-192

Abstract

Machinery distribution company plays a crucial role in supporting various industries by providing the necessary machines and spare parts. This research focuses on the challenges faced by machine distribution companies in Jakarta, which have branches in Surabaya and Medan, Indonesia, especially in the management of warehouse data. The manual inspection process of stored goods for a long period of time results in operational inefficiencies and increased costs. To address this issue, this research proposes the application of enterprise architecture, specifically business architecture, using the open group architecture framework (TOGAF). This method to design optimal business processes that can improve productivity, reduce human errors, and enhance service quality. Through the analysis of current business processes and the planning of enterprise model interactions, this research identifies gaps in business architecture and designs business architecture to support the company's goals. The research results are expected to help companies improve operational efficiency and competitiveness in a constantly changing market.

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