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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.
Arjuna Subject : -
Articles 680 Documents
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Improving the BERT model for long text sequences in question answering domain Ramaraj, Vijayan; Appa Swamy, Mareeswari Venkatachala; Prince, Ephzibah Evan; Kumar, Chandhan
International Journal of Advances in Applied Sciences Vol 13, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i1.pp106-115

Abstract

The text-based question-answering (QA) system aims to answer natural language questions by querying the external knowledge base. It can be applied to real-world systems like medical documents, research papers, and crime-related documents. Using this system, users don't have to go through the documents manually the system will understand the knowledge base and find the answer based on the text and question given to the system. Earlier state-of-the-art natural language processing (NLP) was recurrent neural network (RNN) and long short-term memory (LSTM). As a result, these models are hard to parallelize and poor at retaining contextual relationships across long text inputs. Today, bidirectional encoder representations from transformers (BERT) are the contemporary algorithm for NLP. BERT is not capable of handling long text sequences; it can handle 512 tokens at a time which makes it difficult for long context. Smooth inverse frequency (SIF) and the BERT model will be incorporated together to solve this challenge. BERT trained on the Stanford question answering dataset (SQuAD) and SIF model demonstrates robustness and effectiveness on long text sequences from different domains. Experimental results suggest that the proposed approach is a promising solution for QA on long text sequences.
A review of the antimicrobial benefits of naturally extracted nanomaterials S.I, Asiya; Sarangapani, Anandhi
International Journal of Advances in Applied Sciences Vol 13, No 2: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i2.pp313-324

Abstract

Nanotechnology finds immense potential due to the unique characteristics of nanomaterials. Though noble metal nanoparticles, particularly gold and silver nanoparticles possess advanced properties their conventional production methods pose environmental hazards. This paper explores the eco-friendly approaches using natural sources for synthesizing gold and silver nanoparticles. Rose and pomegranate extracts were used to synthesize gold nanoparticles. Evaluation using ultraviolet-visible (UV-Vis) spectroscopy confirmed the nanoparticle formation, and Fourier transform infrared spectroscopy (FT-IR) analysis recognized the presence of plant-derived compounds for stabilizing these particles. In-depth observations of their size and form were provided using electron microscopy, and these findings were aligned with the inferences made from the UV-Vis data. Silver nanoparticles were produced using Ocimum gratissimum leaf extract (OGE), exhibiting dose-dependent antimicrobial effects against bacterial strains. A comparative analysis demonstrated the distinct antibacterial characteristics of silver and gold nanoparticles against several bacterial strains. These nanoparticles demonstrated enhanced inhibitory effects when employed in combination with antibiotics, suggesting the possibility of dealing with antibiotic resistance. The study presents opportunities for producing nanomaterials with minimal impact on the environment and for addressing antibiotic resistance. Further research can enhance the process and find more useful applications as this green synthesis approach can bring about significant improvements in many areas.
Mechanical gear footstep power generation using a mini generator with buck and boost selectors Sutikno, Tole; Fernando, Rizki; Pamungkas, Anggit; Purnama, Hendril Satrian; Baswara, Ahmad Raditya Cahya
International Journal of Advances in Applied Sciences Vol 12, No 4: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v12.i4.pp343-349

Abstract

In this research, we intend to build a floor-based power plant that produces energy using a mechanical generator drive. The drive system uses a two-gear transmission system with a different number of teeth, resulting in varying torque and speed. The large gear will stick directly to the floor, causing it to spin when the floor is stepped on, and then the small gear will spin the generator quickly. The buck and boost selector systems are powered by fluctuating voltage from the generator. If the voltage produced by the generator is greater than 5 V, the system will reduce it; otherwise, the system will increase the voltage. This selector system uses several modifications of the current circuit between rectifiers, which function to rectify the generator output when the generator rotation changes, a voltage divider is useful for dividing the generator output voltage. The pressure before and after the selector system was measured by applying force on the floor to 15 people with varying loads. The result shows that the buck and boost selector system can work properly, and the nominal output voltage of the generator is around 5 V as needed.
Study of Babak River water quality using physical and chemical parameters in Kebon Kongok landfill (Lombok, Indonesia) Meiliyadi, Lalu Ahmad Didik; Rahman, Muhammad Zainur; Zain, Zahida Aliatu
International Journal of Advances in Applied Sciences Vol 13, No 2: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i2.pp225-233

Abstract

The study has been conducted on the water quality level of the Babak River around Kebon Kongok landfill, Lombok. This research was conducted considering that water has many benefits in the daily lives of people. This research uses an experimental method by analyzing physical parameters (temperature, conductivity, pH, and total dissolved solids (TDS)), and chemical parameters in the form of heavy metal content lead (Pb), iron (Fe), manganese (Mn), and copper (Cu)). Analysis results were compared with quality standards based on Ministry of Health Regulation No. 32 of 2017 concerning water quality. Based on the study, it was found that the farther the distance of water measured from the source of pollution, the value of the physical and chemical parameters of water will be smaller. Most of the physical parameter test results show the Babak River water quality is still at the safe threshold limit but there is 1 point of river water that is polluted due to the distance that is too close to the active zone. Chemical parameters show the results of heavy metal content below the threshold limit. Analysis of the water quality shows that the water is still in good condition, which is below the threshold set by the Indonesian government.
Complexes and bioenergy of invertebrates in oil-polluted gray-brown soils of Absheron Ahmed, Pirverdi Samadov
International Journal of Advances in Applied Sciences Vol 13, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i1.pp141-147

Abstract

Oil pollution negatively impacts not only the physicochemical and morpho-genetic parameters of soils but also the vital activity of soil biota-microorganisms and invertebrates. Studies have established that in the uncontaminated gray-brown soil of the Binagadi and Karadag massifs, the bulk of the invertebrate complex is gastropoda, insecta, tenebrionidae, and carabidae. In lightly oil-polluted biotopes, insecta, gastropoda, lithobiidae, tenebrionidae, carabidae, buprestidae, and woodlice of the genus hemilepstus occupy the leading place. The total number and biomass of invertebrates in uncontaminated biotopes of gray-brown soils of the Binagadi and Karadag massifs is 19.2 ind/m2, respectively; 26 gr/m2 and 20 ind/m2; 3.64 gr/m2. In slightly oil-contaminated biotopes, these indicators vary between 25.6 ind/m2, respectively; 3.5 gr/m2 and 12.8 ind/m2; 0.84 gr/m2. The energy accumulated in the mesofauna biomass in the slightly oil-polluted biotopes of the Karadag and Binagadi massif varies between 0.3268 gr/m2-1418.94 cal/m2 and 1.0468 gr/m2-5072.20 cal/m2, respectively. Thus, the reliability of the biogeocenoses is determined by the level and effective activity of soil organisms.
A novel solar PV integrated fuzzy-logic controlled UAPQC device for power quality enhancement Rao, Lingineni Shanmukha; Sharma, Pidatala Prabhakara; Shankar, Maddiguntla Bhavani; Sakethnath, Sakila Venkata; Kumar, Govindu Bharat
International Journal of Advances in Applied Sciences Vol 13, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i1.pp13-23

Abstract

A novel solar photovoltaics (PV) connected unified active power quality conditioner (UAPQC) device is extensively adopted for enhancing the voltage and current quality of the distribution system. In a three-phase distribution system, the proposed UAPQC mitigates both load-side and source-side allied power quality (PQ) issues. Furthermore, as part of the distributed generation (DG) system, active electricity from solar PV is injected into the grid or source when solar PV is available. In this regard, the proposed UAPQC has been operated by using a workable control method, in both PQ improvement mode and DG incorporation mode. The direct current-link (DC-link) control of the shunt voltage source inverter (VSI) utilizes the proportional-integral controller, which is not suited for the regulation of DC-link voltage at the desired level because of improper selection of gain values. In this work, an intelligent fuzzy-logic DC-link control of UAPQC evidences the intelligent knowledge base for better regulation of power-quality issues. The suggested fuzzy-logic controlled UAPQC device's performance for both PQ improvement and integration of DG is validated using the MATLAB/Simulink computing tool, and simulation findings are given with an appealing comparison analysis.
CHBMLI based DSTATCOM for power quality improvemt in a three-phase three-wire distribution system with PI controller Madhu Babu, Thiruveedula; Chenchireddy, Kalagotla; Sreevarsha, Kama; Praveen, Badudhala; Mohammad, Thanveer; Kashinadh, Ganji
International Journal of Advances in Applied Sciences Vol 13, No 2: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i2.pp325-332

Abstract

This paper presents a cascaded h-bridge (CHB) multilevel inverter (MLI) based MLI based distribution static synchronous compensator (DSTATCOM). The main objective of this paper is to reduce source current harmonics in the distribution system by using a cascade H-bridge multilevel inverter (CHBMLI) as DSTATCOM with a proportional-integral (PI) controller. The PI controller compensates reactive power, reduces source current harmonics, and maintains the unity power factor in the distribution system. The conventional two-level inverter-based DSTATCOM has many disadvantages such as high total harmonic distortion (THD), and high switching stress power semi-conductor devices, suitable for only low-power applications. This paper to overcome these drawbacks by using MLI-based DSTATCOM. The proposed system simulations are verified in MATLAB/Simulink software. The verified results are source current, load current, and compensating current.
Development of a microcontroller and resistive touchscreen-based speed monitoring and control system for DC motor Adebisi, Oluwaseun Ibrahim; Ogundare, Ayoade Benson; Erinosho, Tolulope Christiana; Sonola, Moyosoluwalorun Odunayo; Adesanu, Adesewa Rofiat
International Journal of Advances in Applied Sciences Vol 12, No 4: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v12.i4.pp350-360

Abstract

Speed control is a key requirement in direct current (DC) motor applications where accuracy, reliability, flexibility, and safety are of high importance. In this study, a microcontroller and resistive touchscreen-based DC motor speed monitoring and control system were developed. The core components employed in the development of the system include Arduino ATMega328P microcontroller, thin film technology (TFT) resistive touch screen, L293D motor driver, and infrared (IR) sensor module. ATMega328P microcontroller is the brain of the system around which the overall circuit design was modeled. TFT resistive touch screen displays the motor speed and also, enables the users to set a desired speed. L293D motor driver regulates the voltage and current supplied to the motor, and a feedback loop comprising an IR sensor module ensures the maintenance of the motor speed at the desired level. A performance test was conducted on the developed system to ascertain its correct functionality. The developed speed monitoring and control system operated satisfactorily during testing; achieving a speed control in the range of 800 to 3000 rpm. The developed device is useful and can be scaled up for various domestic and industrial applications.
Implementation approach in legal research Hamzani, Achmad Irwan; Widyastuti, Tiyas Vika; Khasanah, Nur; Mohd Rusli, Mohd Hazmi
International Journal of Advances in Applied Sciences Vol 13, No 2: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i2.pp380-388

Abstract

The use of a research approach in legal research will determine the results. There are three categories of approaches in legal research. The normative approach is the most widely used. This research aims to examine how the approach should be implemented in legal research. This research uses a conceptual approach which is still within the scope of the normative approach. Research data was collected by searching articles published in 23 law journals. The results of this research show that the approach to legal research is the use of perspective in discussing legal issues. There are three legal research approaches, namely normative, empirical, and philosophical approaches with all their variants. The normative approach reviews legal problems from a positive law perspective. The empirical approach examines legal problems as a cultural reality. A philosophical approach examines legal problems from an ideal perspective. The approach to legal research should be applied according to the type of research, research data, and level of research. The normative approach is the most widely used. This is because law is mostly understood as a set of rules. Sequentially, of the 256 articles studied, 70% of legal research used a “normative approach”, 19% empirical, and 11% philosophical.
Drying kinetics of modification cassava-seaweed noodles using an oven Budiarti, Gita Indah; Sulistiawati, Endah; Juwitaningtyas, Titisari; Shitophyta, Lukhi Mulia; Purba, Irene Enjeli; Setiyani, Seila
International Journal of Advances in Applied Sciences Vol 12, No 4: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v12.i4.pp309-316

Abstract

Consumption of noodles in the world is always increasing. Noodles made from wheat flour are unhealthy because they cause diabetes, so alternative noodles are needed, such as modified cassava flour and seaweed. Modification cassava is used because it does not contain gluten and seaweed has nutritional value to make healthy, low-calorie noodles. The purpose of this study was to determine the temperature and time of the drying parameters of seaweed noodles. The drying method uses an oven with variable temperature (60, 70, 80, and 90 ) and drying time (2, 4, 6, 8, and 10 hours). The results of the study obtained optimal water content at 60  with 6 hours of 11.75%. The drying kinetics evaluated by logarithmic equation, optimal drying constant value at 80  of 0.67 h-1 with R2 0.9391. Effective moisture diffusivity (Deff) maximum evaluated by second Fick law obtained 9.35×107 m2/sec at temperature 90  with R2=0.9227. The proximate value of ash content is 12.11%, protein is 9.46%, lipid is 0.10%, and carbohydrates is 65.08%.

Page 45 of 68 | Total Record : 680

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