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All Journal ALGORITMA : JURNAL ILMU KOMPUTER DAN INFORMATIKA Jatilima : Jurnal Multimedia Dan Teknologi Informasi Mudabbir: Journal Research and Education Studies ARZUSIN: Jurnal Manajemen dan Pendidikan Dasar Jurnal Pengabdian Masyarakat dan Riset Pendidikan The Indonesian Journal of Computer Science
Elsa Sabrina
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Religion Humanities Computer Science & IT Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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Performance Evaluation of a Mobile Attendance System Using Dual-Factor Dynamic Qr Code and Gps Geofencing Siregar, Rosma; Maulana, Bagoes; Muhammad Isnaini; Elsa Sabrina; Hutahaean, Harvei Desmon
Jurnal Multimedia dan Teknologi Informasi (Jatilima) Vol. 7 No. 06 (2026): Jatilima : Jurnal Multimedia Dan Teknologi Informasi
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jatilima.v7i06.2281

Abstract

This study develops and evaluates an Android-based attendance system integrating dual-factor authentication using dynamic QR codes and GPS geofencing to prevent proxy attendance in higher education. The system was developed using the Waterfall model and evaluated through quantitative experiments measuring response time, GPS accuracy drift, and security robustness via Black-Box testing. Results show high efficiency with an average response time below 1.5 seconds. GPS validation achieved an average drift of 4.2 meters outdoors and 12.5 meters indoors, remaining within the 30-meter geofencing threshold. The system successfully rejected unauthorized attempts, including out-of-range scans and fake GPS spoofing. These findings demonstrate that combining dynamic QR codes with GPS validation significantly improves attendance authenticity and system reliability compared to single-factor methods. The study provides empirical evidence of a robust and scalable solution for secure mobile-based attendance systems in higher education.
Pengaruh Promosi dan Kreativitas Produk terhadap Keputusan Pembelian pada Toko Sketsa Variasi di Kamang Tangah, Agam Elsa Sabrina; Era Sonita
ARZUSIN Vol 6 No 5 (2026): ARZUSIN: Jurnal Manajemen dan Pendidikan Dasar
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/arzusin.v6i5.11038

Abstract

Promotion and product creativity are important factors influencing consumer purchasing decisions, particularly among micro, small, and medium enterprises (MSMEs) in the creative services sector. Although these two factors have been widely studied, research that specifically analyzes the influence of promotion and product creativity on purchasing decisions in printing and vehicle customization service businesses remains relatively limited. This study aims to analyze the effect of promotion on purchasing decisions, the effect of product creativity on purchasing decisions, and the simultaneous effect of promotion and product creativity on purchasing decisions at Toko Sketsa Variasi in Kamang Tangah, Agam. This study employed a quantitative approach with a causal associative survey design, involving 105 consumers as respondents selected through saturated sampling. Data were collected using a Likert-scale questionnaire that had met validity and reliability tests, and were then analyzed through multiple linear regression with the assistance of IBM SPSS Statistics. The results show that promotion has a positive and significant effect on purchasing decisions, product creativity also has a positive and significant effect on purchasing decisions, and the two variables simultaneously have a significant effect on purchasing decisions, with the ability to explain 50.4% of the variation in purchasing decisions. These findings strengthen the application of the Theory of Planned Behavior in explaining consumer behavior in creative-service MSMEs and broaden the understanding of the role of promotion and product creativity in enhancing purchasing decisions. The conclusion of this study emphasizes that optimizing promotional strategies and strengthening product creativity are important factors in encouraging consumer purchasing decisions. The implications of the study include theoretical contributions to the development of consumer behavior studies and practical implications for MSME actors in optimizing digital marketing-based promotional strategies and improving product creativity to strengthen business competitiveness.
Co-Authors Afandi Yusuf Lubis Aldy Primanda Barus Ambiyar, Ambiyar Andhika Herayono Anjelita Asmar Yulastri Debora Cindy Purba Dedy Irfan Diah Fadilillah Dwi Febrina Eliasta Agustinus Sebayang Era Sonita Fahmi Rizal Firdaus Firdaus Ganefri Ghaitsa Zahira Lubis Hansi Effendi Hasan Maksum Hutahaean, Harvei Desmon Imam F Hutasuhut Ira Gusdhini Harahap Jesica Aime Siahaan Maria Niscaya Ndruru Maulana, Bagoes Mendoza, Muhammad Dominique Monika Putri Puspita Siagian MUHAMMAD ILHAM MUHAMMAD ISNAINI Olnes Hutajulu Pinkan Ramadhani Putri, Tansa Trisna Astono Raden Muhammad Fathur Rahman Rafael Owen Kevin Nainggolan Raffi Hidayat Rahmansyah Angga Saputra Rahmi Isnaini Raisa Nadrah Shafira Hia Reni Rahmadani Rizky Abimayu Utama Tanjung Rosma Siregar Selvia Amanda Kayla Shinta Eva Celina Silvi Amelia Sopiah Rahmadani br Torus Syahputra, Fahmy Wan Safari Ramadhan Waskito Wulansari, Rizky Ema Yulianti, Rosi Zherina Br Sitepu