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Dwi Sulisworo
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Journal of Novel Engineering Science and Technology
Published by Indonesian Institute of Science and Technology Research
ISSN : 29618916     EISSN : 29618738     DOI : https://doi.org/10.56741/jnest.v1i02
Core Subject : Science, Social, Engineering,
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Environmental Science Mechanical Engineering
Journal of Novel Engineering Science and Technology is a multi-disciplinary international open-access journal dedicated to natural science, technology, and engineering, as well as its derived applications in various fields. JNEST publishes high-quality original research articles and reviews in all of the disciplines mentioned above. All papers submitted will go through a rapid peer-review process to ensure their quality. Submissions must contain original research and contributions to their field. The manuscript must adhere to the author’s guidelines and have never been published before. All accepted manuscripts will be indexed in DOAJ, EBSCO, and Google Scholar. The indexation in SINTA, Scopus, and WoS will be provided in the future to provide maximum exposure to the articles.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 82 Documents
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Temperature-Stable 437.5 MHz Current-Starved Ring Oscillator with Bandgap Reference for Nanosatellite Beacon Transmitters Thit Waso Khine; Lei Lei Yin Win; Khin Kyu Kyu Win; Ei Ei Khin; Mya Mya Aye
Journal of Novel Engineering Science and Technology Vol. 5 No. 02 (2026): Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i02.2114

Abstract

This paper presents a 437.5 MHz 3-stage CMOS current-starved ring oscillator (CSRO) with bandgap reference (BGR) design including process, voltage, and temperature (PVT) analysis. The circuit was designed and simulated in LTspice software using BSIM3 models, Level 8, 180 nm technology. The main objective is to design a simple, low-power, low-cost, high-temperature-stable (437 MHz) current-starved CMOS ring oscillator for a nanosatellite Morse code beacon transmitter. For practical implementation, the circuit was designed with standard E12 series resistor values, resulting in a final frequency of 437.5 MHz. The oscillator consumes 0.669 mW from a 1.8 V supply voltage, achieving phase noise of  95.7 dBc/Hz at 1 MHz offset and a figure-of-merit (FOM) of 150.27. The CSRO exhibits a frequency variation of 1.31% over the temperature range of -40℃ to 125℃, demonstrating excellent robustness. A supply voltage variation of 5% results in 7.02 % of frequency change. In this work, a bandgap reference circuit (BGR) was separately designed and simulated, which gave the temperature coefficient of 10.68 ppm/  across the temperature of 40  to 125  and line regulation of 0.18% across the supply voltage variation of 10%. The design includes PVT analysis across worst-case corners, temperature extremes, and ±5% supply voltage variation on operating frequency and power consumption to ensure results closely match measurements.
Development of a Visual Attention Game Using Difference Detection Mechanics: Design and Usability Evaluation Bambang Robi'in; Wahyu Pujiyono; M. Bobbyzal Cendana Ze
Journal of Novel Engineering Science and Technology Vol. 5 No. 02 (2026): Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i02.2215

Abstract

The increasing use of mobile devices has led to the widespread adoption of digital games as interactive systems. However, most mobile games are primarily designed for entertainment and rarely incorporate structured interaction mechanisms to support cognitive training. This study presents the design and development of a visual attention-based mobile game that uses difference-detection mechanics as its core interaction model. The game, named FindX, was developed using the Game Development Life Cycle (GDLC) framework, including initiation, pre-production, production, and testing stages, and implemented using the Unity engine on the Android platform. The system incorporates structured gameplay elements, including progressive difficulty levels, time constraints, and penalty mechanisms for incorrect interactions, to encourage focused visual processing. Functional testing was conducted using a black-box approach to ensure system reliability. Expert evaluation using the Learning Object Review Instrument (LORI) was performed to assess media quality and content suitability. In addition, usability testing was conducted with 23 participants using the System Usability Scale (SUS). The results indicate that the system achieved a media quality score of 80% and a content feasibility score of 93.3%. The usability evaluation produced an average SUS score of 74.1, categorized as Good and Acceptable. These findings indicate that the proposed system is functional, of good media and content quality, and user-friendly, providing a usable interactive environment designed to support visual attention training through structured game mechanics. Efficacy in improving visual attention was not measured in this study and is identified as future work.

Page 9 of 9 | Total Record : 82

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