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All Journal JOIV : International Journal on Informatics Visualization Jurnal Nasional Pengelolaan Energi MigasZoom AJAD : Jurnal Pengabdian kepada Masyarakat Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Prosiding Seminar Nasional Teknik Elektro, Sistem Informasi, dan Teknik Informatika (SNESTIK) Edukasia: Jurnal Pendidikan dan Pembelajaran Electrician : Jurnal Rekayasa dan Teknologi Elektro ELPOSYS: Jurnal Sistem Kelistrikan Journal of Systems, Information Technology, and Electronics Engineering Jurnal INFOTEL Jurnal Polimesin Civitas: Jurnal Pengabdian Masyarakat
Astrie Kusuma Dewi, Astrie Kusuma
STEM Akamigas Jl. Gajah Mada No.38 Cepu, 58315
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Foveal Avascular Zone Image Encryption using Pixel Scrambling Combination Technique for Medical Image Security Purnamasari, Dewi; Herlinudinkhaji, Didin; Dewi, Astrie Kusuma; Mauludin, Muhammad Zairon
JURNAL INFOTEL Vol 16 No 1 (2024): February 2024
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v16i1.1029

Abstract

Data theft from year to year has increased in the era of big data and society 5.0. One area that requires data security is patient medical data. Medical image data security must be done to protect medical data security from data theft by third parties so that they cannot access the data. The development of Diabetic Retinopathy (DR) is also increasing every year. Determining the severity of DR is done by detecting the Foveal Avascular Zone (FAZ). Encryption is the process of changing a plain image into a cipher image. In this study, we compared the results of image quality and encryption time between the Vigenere Cipher method and a combination of pixel scrambling. The average encryption time of the tested FAZ images is 3.20 seconds. This result proves that the pixel combination method has a faster encryption time than the Vigenere Cipher. Vigenere Cipher encryption time is 4.96 seconds. The existence of the FAZ area with the pixel combination randomization method of the encryption process is also invisible, so third parties will not know about its existence.
Emergency Response Workshop on Fire Prevention and Control Using Fire Blankets and Fire Extinguishers Nugroho, Budi Sulistiyo; Annasit; Nurrahman, Arif; Dharmawan, Aditya; Setiyono, Agus; Hamid, Farid Alfalaki; Handoko, Susilo; Widiyanto, Totok; Dewi, Astrie Kusuma; Indriani, Erdila
Civitas : Jurnal Pengabdian Masyarakat Vol. 2 No. 4 (2025): December 2025
Publisher : Indonesian Scientific Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61978/civitas.v2i4.1175

Abstract

Fire incidents continue to increase in various regions in Indonesia due to low public awareness of prevention and early response measures. This community service activity aims to improve students' knowledge, skills, and preparedness in using fire blankets and portable fire extinguishers through experience-based training. The implementation methods include interactive lectures, live demonstrations, and controlled firefighting simulations. Pre- and post-training evaluations were used to measure changes in knowledge, skills, and safety attitudes. A total of 180 participants (aged 15–18 years) attended the training and completed the entire evaluation series. The results showed an average increase in knowledge scores from 52.3 to 86.8 points (+66%). Practical competence increased from 14% to 81% of participants who were assessed as being able to use the tools correctly. Attitudes and confidence in emergency response also showed significant improvement, from a score of 2.4 to 4.1 on the Likert scale. Qualitative feedback confirmed that participants felt better prepared to deal with small fires and had a better understanding of the importance of a safety culture in the school environment. These findings indicate that practice-based training is effective in strengthening fire preparedness among secondary school-aged groups. This workshop model offers an educational approach that can be replicated by other educational institutions as a risk mitigation strategy and to strengthen community-based safety culture.
RANCANG BANGUN SiSTEM BATCH CONTROL AIR PENGUMPAN PADA PRODUKSI BROWN GAS BERBASIS ELEKTROLISIS ALKALI Novan Akhiriyanto; Ibrahim, Ahmad Rasyid; Adi, Wasis Waskito; Dewi, Astrie Kusuma
Jurnal Nasional Pengelolaan Energi MigasZoom Vol. 7 No. 2 (2025): Jurnal Nasional Pengelolaan Energi MigasZoom
Publisher : Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37525/mz/2025-2/1171

Abstract

Elektrolisis air merupakan proses terjadinya penguraian air menjadi gas hidrogen dengan dialiri arus listrik searah melalui elektroda katoda dan anoda yang tercelup ke dalam larutan elektrolit. Penelitian ini untuk merancang prototype batch control system pada produksi hidrogen menggunakan metode elektrolisis. Sistem dikembangkan dengan sistem otomatis untuk meningkatkan efisiensi pada produksi hidrogen, khususnya brown gas atau gas HHO, karena proses elektrolisis alkali yang belum terpisah antara gas hidrogen dan gas oksigen. Proses elektrolisis ini menggunakan larutan elektrolit Kalium Hidroksida (KOH) dengan pengaturan arus dan tegangan yang bervariatif. Terdapat komponen utama yang digunakan yaitu tabung electrolyzer, pompa DC, solenoid valve DC, level switch, mikrokontroler ESP32, sensor Electrical Conductivity (EC), dan sensor MQ-8. Untuk melakukan pengujian diperlukan database InfluxDB dan antarmuka Grafana yang mempermudah interaksi antara alat dengan manusia. Hasil yang diperoleh menunjukkan bahwa batch control system mampu beroperasi stabil, dengan keluaran hidrogen yang lebih tinggi pada kondisi tegangan suplai 6V dengan arus 8A. Namun, karena pengujian masih terbatas pada 2 kondisi ujicoba, maka kondisi terbaik hanya berlaku pada rentang percobaan yang telah dilakukan, sehingga penelitian lanjutan diperlukan untuk menetapkan parameter operasi yang benar-benar optimal.
Enhancing Safety Awareness through Oil and Gas Occupational Health Training for Students in Blora and Bojonegoro Handoko, Susilo; Nugroho, Budi Sulistiyo; Widiyanto, Totok; Kasturi, Kasturi; Aji, Ferro; Sujono, Sujono; Noviyanto, Hernawan; Auli, Haris Numan; Dewi, Astrie Kusuma; Indriani, Erdila
AJAD : Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 3 (2025): DECEMBER 2025
Publisher : Divisi Riset, Lembaga Mitra Solusi Teknologi Informasi (L-MSTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59431/ajad.v5i3.674

Abstract

Blora and Bojonegoro, as regions with intensive oil and gas activities, require strengthened community safety capacity, especially among students. This study evaluates the effectiveness of a community-based occupational health and safety training program using an experiential learning approach. The three-day program included interactive lectures, group discussions, and simulations involving fire extinguishers, fire blankets, sound level meters, and multi-gas detectors. Evaluation employed validated pre-tests and post-tests, along with a structured skills assessment rubric. Results indicate a 53.9% increase in safety knowledge, with 93% of participants demonstrating proper use of fire extinguishers and fire blankets. Qualitative findings show improved risk awareness and confidence. These results align with experiential learning theory and social learning theory, and are consistent with recent studies confirming the effectiveness of safety simulations. The study concludes that community-based occupational health and safety training effectively improves student safety competence in oil and gas regions and can be replicated in other high-risk sectors. Recommendations include periodic simulation-based training, creation of school and village safety volunteer teams, integration of occupational health and safety life skills into school curricula, and longitudinal evaluation of knowledge and behavior retention.
Co-Authors Adi, Wasis Waskito Aditya Dharmawan, Aditya Agus Setiyono Aji, Ferro Annasit Auli, Haris Numan Azzahra, Alifia Chalidia Nurin Hamdani Dewi Purnamasari Didin Herlinudinkhaji, Didin Ditto, Gusza Farras, Fitrianne Hamid, Farid Alfalaki Handaja, Suka Handoko, Susilo Hengkesa, Melinda Ibrahim, Ahmad Rasyid Indriani, Erdila Kasturi Kasturi, Kasturi Labatar, Gilbert Mareta, Silvia Mauludin, Muhammad Zairon nabilah, alifiyah shaffa Novan Akhiriyanto Noviyanto, Hernawan Nugraha, Wijaya Adi Nugroho, Budi Sulistiyo Nurrahman, Arif Pratama, Akbar Septiani, Natasya Aisah Sugirto, Ihrom Sujono Sujono, Sujono Triyanto, Roni Heru Wardhana, Asepta Surya Widiyanto, Totok Yuliatin, Umi