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Robust UAV localization of ground sensors in urban environments via path loss refinement and geometric selection Elngar, Ahmed M. A. A.; Lim, Heng Siong; Kit Chan, Yee; Bakhuraisa, Yaser Awadh; Wahidah, Ida
IAES International Journal of Artificial Intelligence (IJ-AI) Vol 15, No 1: February 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijai.v15.i1.pp412-428

Abstract

Localizing ground sensors with unmanned aerial vehicles (UAVs) in dense urban environments is challenging because multipath and non-line-of-sight (NLoS) propagation distorts path loss (PL) measurements. This paper proposes a two-stage UAV localization framework that refines PL data and selects geometrically stable waypoint subsets before position estimation. In stage 1, PL samples are spatially smoothed by averaging measurements at neighboring UAV waypoints to reduce localized fluctuations. In stage 2, waypoint subsets are filtered using non-collinearity and non-adjacency constraints, and sensor positions are estimated using weighted least squares (WLS) and particle swarm optimization (PSO), with final estimates averaged across valid subsets. Wireless InSite ray-tracing simulations show that the framework reduces mean absolute error (MAE) from over 150 m to approximately 8.5 m. The proposed approach improves the practicality of UAV-assisted localization for urban internet of things (IoT) sensor deployments.
PELATIHAN PEMBUATAN NUGGET IKAN LELE UNTUK PENANGGULANGAN STUNTING KEPADA ORGANISASI PROFESI BIDANG PENDIDIKAN DAN MASYARAKAT KADER DI KOTA TASIKMALAYA Marwan, Iis; Wahidah, Ida; Rahmat, Agus Arief
Jurnal Pengabdian Siliwangi Vol 11, No 1 (2025)
Publisher : LPPM Univeristas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jsppm.v11i1.18038

Abstract

The large number of processed fish on the market does not necessarily guarantee that the processed fish has a level of cleanliness and nutritional content that is good for health. One form of processed food that children like is nuggets. By processing it into nuggets, fish becomes easy to eat, making it suitable for use as food for children. The objectives of this activity are (1) Training educational organization administrators and community partners in making processed catfish nuggets; (2) Providing catfish nuggets to people who have stunted children; (3) introduce various fish preparations that are healthy, nutritious, delicious and definitely liked by children, (4) teach how to prepare food made from fish. This activity was carried out in Kahuripan Village, Tawan District, Tasikmalaya City, assisted by KKN group 41 students from Siliwangi University. Activities are carried out through counseling and training with several stages, namely lectures, direct demonstration and practice, providing leaflets, and monitoring. Achievement of activities in the form of education on making catfish nuggets and their handling by partners. The number of participants was 80 cadres. The conclusion of this activity is that by increasing the ability of cadre administrators in making catfish nuggets, the outreach program has been successful in increasing mothers' insight into making a variety of fish-based foods, as well as providing food for stunted children.