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International Journal of Applied Sciences and Smart Technologies
Published by Universitas Sanata Dharma
ISSN : 26558564     EISSN : 26859432     DOI : http://dx.doi.org/10.24071/ijasst
Core Subject : Science, Engineering,
Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering
International Journal of Applied Sciences and Smart Technologies (IJASST) is published by Faculty of Science and Technology, Sanata Dharma University Yogyakarta-Central Java-Indonesia. IJASST is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in engineering, science, technology, and basic sciences which relate to technology including applied mathematics, physics, and chemistry. IJASST accepts submission from all over the world, especially from Indonesia.
Arjuna Subject : Umum - Umum
Articles 183 Documents
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Bubble flow configurations generated by ejector type bubble generator Catrawedarma, I Gusti Ngurah Bagus; Ton, Sefri; Pranowo, Dadang Dwi; Surahmanto, Fredy; Astyanto, Achilleus Hermawan
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.10816

Abstract

Bubble flow configurations generated by an ejector bubble generator were captured using a high-speed video camera and extracted into several images. The air flow and nozzle diameter were varied during the test in ranges of 0.1-1.5 lpm and 1.17-3.5 mm, respectively. The results reveal that in general the bubble flow structure coming out from the bubble generator is divided into three regions, namely the entrance, bubble swarm, and bubble dispersed region. It is found that there is a higher time delay of bubble production when the air flow and the nozzle diameter decrease. On the other hand, the bubble production time is longer, if the air flow and the nozzle diameter increase.
Cluster Change Analysis to Assess the Effectiveness of Speaking Skill Techniques using Machine Learning Wulandari, Nunik Herani; Purwayoga, Vega
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.9667

Abstract

This study aims to compare effective teaching methods for speaking using machine learning. The classes used in this study consisted of three classes: conventional, vlog project, and picture series. The data used were students' pre-test and post-test scores. The machine learning algorithm used is K-Means. K-Means clusters the pre-test and post-test data. The results of K-Means clustering on the pre-test and post-test identified the differences in student groups between the pre-test and post-test. Students who experienced the most cluster movement were those in the vlog project class, the conventional class, and the picture series class.
Determination of Premium Reserves for Whole Life Insurance Using the Canadian Method with Varying Premium Payment Periods Wynnie, Illuminata; Yefan, Yefan
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.12283

Abstract

Premium reserves are essential funds prepared by insurance companies, particularly in life insurance, to cover potential future claims. These reserves are calculated based on premiums paid by policyholders and must be sufficient to meet all projected claim-related expenses. A lower reserve implies reduced financial liability and typically correlates with more affordable premium rates for policyholders. This study aims to analyze the determination of premium reserves using the Canadian and Prospective methods in traditional life insurance products, specifically whole life insurance, focusing on different premium payment periods. The Indonesian Population Mortality Table (TMPI) 2023 and the Bank Indonesia interest rate of 5.57% (as of April 2025) as the calculation basis. The results show that the Canadian method produces lower reserve values compared to the Prospective method and indicate a decreasing trend in reserve values as the premium payment period increases in both methods.
Comparison of Laterite Nickel Deposit Levels on the Mining Front with Stockpile at PT Ceria Nugraha Indotama, Kolaka Regency Anshariah, Anshariah; Irwan, Muhammad Reza Ardhana; Thamsi, Alam Budiman; Aswadi, Muhammad
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.10460

Abstract

PT Ceria Nugraha Indotama is a company engaged in mining laterite nickel ore in Wolo sub-district, Kolaka district, Southeast Sulawesi province. In lateritic nickel ore mining activities, there is often a difference in levels of laterite nickel ore when it is still in the mining front and after being transferred to the stockpile. This research is to determine the proportion of differences in the levels of Ni, Fe, MgO and SiO2 on the mining front with the stockpile and to determine the factors that influence changes in nickel content. The method used in this study is the grab sampling method in front mining and stockpile. The results of this study are based on the results of the analysis, obtained data on the levels of Ni, Fe, MgO and SiO2 on the mining front with a stockpile, the Ni content has a difference of 0.05% and the Fe content has a difference of 0.34%, the two minerals have the highest grades on the mining front. mining and MgO content has a difference of 2.68% and SiO2 content has a difference of 8.87%, the two minerals have the highest grade in the stockpile. Factors that influence changes in nickel content are the heterogeneous distribution of ore, the position of the waste above the ore and the rainy weather that occurs in the field, operator and sampling skills.
Assessing Motorcycle Helmet Usage Rates and Road Safety Laws Awareness among Motorcyclists in Bangladesh Khan, Md. Tanjil Mahmud
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.9948

Abstract

This research investigates helmet usage rate and motorcyclists’ awareness of road safety laws regarding helmet usage in the Darial Union of Bakerganj Upazila, Bangladesh. A structured questionnaire collected data from 100 participants representing various age groups and professions. Then, data analysis using JASP software revealed significant gaps in helmet usage and awareness of road safety laws regarding helmet usage, particularly among younger individuals aged 15-20 and motorcycle drivers. At the same time, older participants (aged 41 and above) demonstrated higher helmet usage and better understanding; younger riders and those in high-risk professions, such as motorcycle drivers, students, and the unemployed, needed to be more informed and compliant with safety practices. The findings highlight the importance of focused educational efforts and training programs to promote helmet use and raise road safety awareness, particularly in Darial Union's rural districts.
A Green Pathway to Advanced Cobalt Oxide Materials: Dye Integration and Phytochemical Modification Otah, Patricia Benedict; Nworie, Ikechukwu Christian; Echeweozo, Eugene; Ojebeagu, Augustine; Chikwendu, Augustine; Nwigwe, God`swill
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.11611

Abstract

This study investigated the impact of natural dyes derived from three plant sources (Eupatorium odoratum, Ageratum conyzoides, and Pueraria phaseoloides) on the bandgap energies of cobalt oxide (CoO) thin films thin films were synthesized using a chemical bath deposition technique at 80-85°C and subsequently annealed at 100°C, 150°C and 200°C. The incorporation of these natural dyes significantly influenced the bandgap energies of the CoO films, with values ranging from 3.80 eV to 4.12 eV depending on the dye and annealing temperature with the as-grown films exhibiting bandgap energies ranging from 3.80 eV to 4.00 eV. Moderate heat treatment typically increased the bandgap of the films, but at higher temperatures, the behavior became more complex, with some dyes demonstrating a substantial reduction in bandgap. These findings demonstrate the potential of utilizing natural dyes to effectively tailor the electronic structure of CoO, offering a sustainable and eco-friendly approach to materials modification.
Evaluating User Experience E-Commerce Platform Using Hassenzahl Framework Kikitamara, Sesaria; Wijaya, Stevanus Wisnu
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.10405

Abstract

The Hassenzahl framework of UX provides an approach in measuring user experience of a product which covers such the following aspects : be goals, do goals, and motor goals. Yet the further approach for practical implementation in digital product like e-commerce platform is still insufficient. Another approach, the scenario model provides a journey mapping viewing from the user perspective. Thus, generally this method was used to portray the interaction process between user and product. Furthermore, the term of user journey is also commonly used by the UX designer in order to understand what actually the user needs, not just the user want. The solution offered to discuss within this paper is integrating three key elements of Hassenzahl method for every scenario in the e-commerce process. Hopefully the solution as presented on this paper will generate more credible properties and decent tools for developing an efficient, user friendly, and engaging e-commerce application.
Geocoding and Development of a Web-Based Water Distribution Geospatial Information System for Ilorin Metropolitan City, Kwara State Nigeria Amoo, Oseni Taiwo; Salami, Habib Adedayo; Okeola, Olayinka Gafar; Sunday, Abayomi; Abdulkadir, Taofeeq Sholagberu; Salami, Adebayo Wahab
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.10120

Abstract

Water is essential for human life and activities, but its supply depends on the proximity and interconnection network with the populations or cities that need it. Moreso, the proper functioning of water supply systems (WSS) relies on the expertise and experience of field workers who rely on information from maps or field surveys, whose processes and mapping methods are labour-intensive, time-consuming, and are done relatively infrequently. This study explores modern spatial databases for meaningful technical progress using the Quantum Geographic information system (QGIS) server to host a web-based geocoding platform to view the production, transmission, and delivery of drinking water from the source to household users according to the capacities planned for by WSS. The resultant results met expert expectations on the designed web system and showed information on pipe network, road connection, drinking water distribution layout, catchment boundary, slope, and sub-catchment geometric properties demonstrating the utility of a web-based online Map plugin in the GIS environment as a data management, scenario analysis, and decision support tool in managing water infrastructure for an expanding metropolitan city like Ilorin, Kwara State.
The Effect of Flexible Resin and Standard Resins Mixtures Variations on Dimensional Accuracy Using SLA 3D Printing Dyaksa, Gilang Argya; Aji Nugraha, Felix Krisna; Astyanto, Achilleus Hermawan; Mardikus, Stefan; Seen, Michael; Rines, Rines; Lukiyanto, Yohanes Baptista; Purwadianto, Doddy; Winarbawa, Heryoga; Kusbandono, Wibowo; Sugiharto, Budi; Hermawan, Oktavianus Nekson; Putra, Mahendra Pratama
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.12272

Abstract

The present study investigates the effect of the concentration of flexible resin on the dimensional accuracy of mixtures product manufactured by 3D printing using SLA technology. Specimens were designed and according to the ASTM D412 standard. Ten variations of resin mixtures were examined. The concentrations of the flexible resins were varied from 10% to 100%. Measurements of accuracy dimension were conducted on the fabricated specimens, and the average deviation was used to estimate the dimensional accuracy. The study reveals the least deviation in dimensions in the 10% flexible resin containing mixture and the highest in the 60% flexible resin containing mixture. The results explain the fabrication tendency of flexible resins in dimensional accuracy for 3D printing.
In Vitro Regeneration of Dendrobium Through Somatic Embryogenesis from Leaf Explants Hamiranti, Rahmadyah; Prajaka, Nanang Wahyu; Yeni, Yeni; Maulida, Desi; Erfa, Lisa
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 2, December 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i2.12705

Abstract

The purpose of this study was to determine the best basic medium type and TDZ concentration for the development of somatic embryos from Dendrobium orchid leaf explants. Three replications were arranged factorial (2x3) in a completely randomized design for this study. First, there were two types of basic media, ½ MS and MS. The second factor was the concentration of cytokinin thidiazuron 1, 2 and 3 mg/L. Each experimental unit consisted of 5 culture bottles, each contained 5 explants. The research results showed that 1) The use of both types of basic media was able to induce callus formation on Dendrobium 'Gradita 31' orchid from leaf explants. 2) The use of 3 mg/L thidiazuron which combined with ½ MS or MS media was able to form primary callus faster than other treatments. 3) The higher percentage for embryo somatic and shoots formation were also found in 3 mg/L thidiazuron.

Page 17 of 19 | Total Record : 183

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