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All Journal JOURNAL ONLINE OF PHYSICS Physical Therapy Journal of Indonesia
Prima Asmara Sejati
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Health Professions Medicine & Pharmacology Neuroscience Nursing Physics Public Health

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PERBAIKAN ALGORITMA STEGANOGRAFI TEKNIK LEAST SIGNIFICANT BITS UNTUK APLIKASI KEAMANAN DATA Tika Erna Putri; Muhammad Rifqi Al Fauzan; Prima Asmara Sejati
JOURNAL ONLINE OF PHYSICS Vol. 3 No. 1 (2017): JOP (Journal Online of Physics) Vol 3 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (547.801 KB) | DOI: 10.22437/jop.v3i1.5343

Abstract

Security issues have become major problem in the field of data communications, specifically in the data transmission through the internet. One of the solutions is to hide the messages through a digital media so the attention of the attacker or third party can be avoided, this method is known as steganography. In this research, we use images as digital media. We modify the Least Significant Bit (LSB) which is the most commonly used technique in steganography. Unfortunately LSB has poor security level since it is already widely known technique. Therefore, it is important to modify the algorithm of LSB to ensure its security aspect. An improvement to LSB technique is suggested by selecting only odd pixels and ignoring even pixels in the implementation of steganography. We successfully implement the modified LSB algorithm by using RBG image and grayscale image as steganography media. Mean Squared Error (MSE) and Peak Signal-to-noise Ratio (PSNR) are employed to evaluate the stego-image quality. Our calculations show that the modified LSB algorithm provides better results than the conventional LSB. The conventional LSB algorithm gives 1.98 10-5 for MSE and 95.20893 dB for PSNR calculations, while the modified LSB gives 1. 80 10-5 and 95.6101 dB for MSE and PSNR, respectively.
Development of therapy aids with electromyography technology for post-stroke patients Budi, Savitri Citra; Budi Sumanto; Lilik Dwi Setyana; Prima Asmara Sejati; Siti Alimah
Physical Therapy Journal of Indonesia Vol. 6 No. 2 (2025): July-December 2025
Publisher : Universitas Udayana dan Diaspora Taipei Medical University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51559/ptji.v6i2.319

Abstract

Background: The prevalence of stroke in Indonesia has been increasing and has had a significant impact on individuals, families, and society. There is a pressing need for innovative assistive devices that support independent therapy and enhance patient motivation to improve post-stroke productivity. This study aimed to design and develop a post-stroke rehabilitation assistive device utilizing electromyography (EMG) technology. Methods: This study employed a research and development (R&D) design. Data were collected through documentation studies, interviews with physiotherapists, observations, and focus group discussions (FGDs). A documentation study was conducted using the medical records of stroke patients. Interviews were conducted with physiotherapists, and observations were carried out to understand patients’ therapeutic activities. Results: This study provided alternative therapy by developing post-stroke rehabilitation aids with EMG technology. Based on the documentation study, 88% of patients experienced ischemic stroke with a good level of consciousness (E4V5M6), indicated by the Glasgow Coma Scale (GCS) score of 15. Conclusion: This phenomenon supported the development of electrical therapy innovations to accelerate stroke recovery. This study successfully designed a hand therapy device using EMG technology to improve patients’ motor function, particularly among those with E4V5M6 levels of consciousness and limited motor skills.
Co-Authors Budi Sumanto Lilik Dwi Setyana Muhammad Rifqi Al Fauzan Savitri Citra Budi Siti Alimah Tika Erna Putri