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Development of an IoT-Based Electric Safety Buoy with Autonomous Navigation System for Coastal Water Rescue Operations Hari Muktafin, Elik; Abdullah Sukri, M Iqbal; Aziz Muzani, Ma'ruf; Sulistiyono, Mulia; Kusrini, Kusrini; Setiaji, Bayu
Journal of Applied Informatics and Computing Vol. 9 No. 6 (2025): December 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v9i6.11674

Abstract

This research aimed to develop and evaluate an IoT-based electric safety buoy equipped with an autonomous navigation system to support Search and Rescue (SAR) operations in coastal environments. The system integrates dual‐thruster propulsion, GPS and Inertial Measurement Unit (IMU) sensors, IoT telemetry, and a Return-to-Home (RTH) mechanism, enabling both manual and autonomous operation modes. Prototype testing was conducted in a controlled aquatic environment under light wave conditions (10–25 cm) and mild surface currents (0.18–0.32 m/s), with calm weather and unobstructed line-of-sight communication. The buoy was evaluated in both unloaded and 2 kg payload conditions, traveling at an average speed of 1.25–1.35 m/s across test sessions lasting 12–18 minutes. Three predefined GPS waypoints were used to assess navigation accuracy, motion stability, RTH reliability, and telemetry performance. Results show that the autonomous mode achieved a mean positioning error of 1.12 m, a cross-track deviation of 0.35 m, and a waypoint success rate of 96%, outperforming manual navigation by 52%. The RTH function maintained a success rate of 100% under low-battery conditions and 92% during communication loss, while IoT telemetry remained stable up to 200 meters with less than 1% packet loss. These findings confirm that integrating IoT-based telemetry with adaptive autonomous navigation enhances rescue mission efficiency and operational safety, while indicating the need for further validation under more challenging open-sea conditions.
Analisis Dinamika Pertumbuhan Penduduk Sleman Menggunakan Model Interpolasi Lagrange Hanifah, Nirmatun; Azahra, Angelina Nabila; Setiaji, Bayu
Fraktal : Jurnal Matematika dan Pendidikan Matematika Vol 6 No 2 (2025): November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fractal.v6i2.22597

Abstract

Population growth is a vital aspect of regional planning; however, the limited availability of census data over certain periods poses challenges for strategic decision-making. Therefore, a predictive method capable of accurately filling data gaps is essential. This study employs the Lagrange polynomial interpolation method, implemented in MATLAB, to model and predict the population of Sleman Regency from 2016 to 2045, including estimates for years beyond the available data. The analysis results indicate that the Lagrange interpolation method can generate reasonably accurate predictions and reflect a stable growth trend following the COVID-19 pandemic. The use of MATLAB facilitates calculations and visualization, thereby enhancing the effectiveness of the analysis. These findings affirm that Lagrange interpolation is an effective tool for demographic data prediction, which is crucial for supporting data-driven policymaking toward sustainable development. Based on these results, it is expected that the accuracy of regional and national development strategies can be improved in addressing future socio-economic dynamics.
Penguatan Kemampuan Menulis Karya Ilmiah Bagi Guru Sekolah Menengah Di Kampung Emas UNY Kota Yogyakarta Setiaji, Bayu; Aminatun, Tien; Rosana, Dadan; Mahmudi, Ali; Pujianto; Fatin, Rahma Nabila; Damayanti, Anastasya
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 10 No. 1 (2026): Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Workshop penulisan karya ilmiah dilaksanakan untuk meningkatkan kemampuan menulis guru sekolah menengah di Kampung Emas UNY Kota Yogyakarta, khususnya dalam menghasilkan karya tulis yang sesuai kaidah akademik. Kegiatan ini berupa pendampingan penulisan artikel ilmiah yang melibatkan narasumber akademisi dan praktisi pendidikan. Para guru SMP Negeri 12 Yogyakarta mengikuti rangkaian kegiatan, yang mencakup penyampaian materi, diskusi, praktik penyusunan draft, serta evaluasi melalui angket. Hasil angket menunjukkan bahwa pemahaman guru terhadap struktur artikel ilmiah, terutama bagian pendahuluan (57,6% baik) dan hasil penelitian (60,6% baik), berada pada kategori cukup memadai. Namun, bagian metode penelitian masih menjadi kendala utama dengan hanya 45,5% peserta yang menilai pemahamannya baik. Sebagian besar peserta menilai pemaparan narasumber jelas dan mudah dipahami, serta lebih dari 90% menyatakan berkomitmen untuk menerapkan keterampilan menulis dalam menghasilkan karya ilmiah. Temuan ini menunjukkan bahwa workshop efektif dalam meningkatkan literasi akademik guru, meskipun masih diperlukan pendampingan berkelanjutan agar keterampilan menulis dapat berkembang secara konsisten.
Co-Authors Abdullah Sukri, M Iqbal Adha, Esa Hidayatul Adisurya, Ahmad Najla Fikriya Adiyatma, Jovan Afifah, Nabila Afifah, Salwa Rihhadatul Afuwu, Eka Fitri Aisyah Putri, Aisyah Akhdania, Mahsa Ali Mahmudi Ali Mustopa, Ali Alifah, Khisna Aminatun, Tien Andhini, Nia Maharika Andi Sunyoto Anggraini, Zunita Dwi Anwari, Aldi Yunan Arcita, Gabriela Nofel Arda, Muhammad Adhli Armanda, Rizal Endrya Arofanti, Andini Nur Audrianita, Nazura Ayu Amalia AYU LESTARI Ayu Sukma, Melani Dyah Ayuningsih, Bella Azahra, Angelina Nabila Aziz Muzani, Ma'ruf Aziz, Khafidh Nur Azzahra, Talitha Rahma Bagus Pratama Banowati, Rika Bella, Alya Nurfita Cahyani, Marini Ayu Dadan Rosana Damayanti, Anastasya Damayanti, Bergitha Putri Damayanti, Senia Darmasanti, Herliana Amanda Daynuari, Mellina Ayu Dedi Jayanta, Ida Ketut Eko Pramono Elsen, Rickard Ema Utami Faila, Rohaya Evatri Fajriyanti, Neng Nenti Falah, Muhammad Miftakhul Farhan, Nur Muhammad Farida Agus Setiawati Farkhan, Muhamad Mi'da Fathira Oktavina, Siti Fatin, Rahma Nabila Fatmawati, Alya Fauzan, Muhammad Alwan Fauzika Maurisa Rohmah, Amanda Fauziyah, Adinda Jaida Febiawati, Nabilla Ika Febiyan, Vio Anwar Febriani, Yuliana Felisiana, Fidel Risti Ferry Wahyu Wibowo Gumilar, Ari Fajar Haliza, Ronandita Laila Hanif Al Fatta Hanifah, Nirmatun Hapsary, Yunni Hari Muktafin, Elik Hati, Fadhila Kusuma Hidayah, Hani Nur Hidayah, Vivi Nur Hidayah, Yuliani Hidayat , Nadhifa Muftisany Hidayati, Nuril Ngilmi Hikmah, Dwi Lailatul Hoeriah, Dea Nurul Husna, Salsabila Imanika, Agesta Diva Indrakusumah, Muhammad Rafi Ismail, Ridwan Izzulhaq, Azzafa Jahid , Sarah Mohamad Jalil, Asimi Rafsan Jati, Nanda Pramesthi Arum Johan, Asya Ananda Amelia Nadya Kamal, Muhammad Fauzi Syaiful Kasanah, Putri Nur'aini Nur'aini Khalidah, Hanin Izzatul Kuncoro Asih Nugroho Kusrini, Kusrini Laily, Rana Latif, Dovanda Rahmi Maharani, Devinda Putri Maharani, Laras Anindita Maheta Anisa Haqqu Mahfudhoh, Al-Aina Melinda, Zihan Mohamad Jahid, Sarah Mubarokah, Izza Ifada Mudzaki, M K Mufida, Fathiyya Muhammad Rizky Ramadhan Muktafin, Elik Hari Mulia Sulistiyono Munthe, Clara Dwipuan Mutahharah Hasyim, Mutahharah Mutmainna, Mutmainna Nashih, Syahid Ahmad Nathaniela, Raden Roro Nimas Sekar Nafa Ngilmi, Nuril Novita Wulandari Nur'Aini, Latiifa Nuraeni, Intan Nurfitri, Lulu Bintang Nuryaman, Afini Vinnahari Nur’Aini, Latiifah Ocktaviani, Tasya Fitri Oktamaypasha, Rias Pangastuti, Destya Pulung Pangestu, Dimas Aji Pitono, Anindita Putri Canina Pratama, Rodeo Bagus Pri Ariadi Cahya Dinata, Pri Ariadi Cahya Pujianto Pujianto Pujianto Puri, Putri Rose Amanda Purwestri, Tisha Puspitasari, Ayunda Puspitasari, Zufada Putra, Andriyan Dwi Putri, Faniya Nur Haryadi Eka Putri, Faradiva Anggraena Putri, Nofita Dewi Rahmah, Arina Alfa Rahmawati, Gabriel Dina Ramadany, Nila Ayu Ramadhani, Motik Mutiara Revalina, Jihan Alya Riki Perdana Rodiansyah, Novan Ruslam, Alam Safitri, Nur Alsa Wulan Saharani, Elsa Salsabila, Puti Azka Salsabilla, Sasqia Shafa Sari, Desy Kumala Sari, Mona Sasauw, Dinda Permata Sasikirana, Lituhayu Septiana Rasti, Theresia Adinia Solikhah, Nanda Annisa Sukardiyono Sukardiyono Sukma, Melani Dyah Ayu Syafei, Fikri Ramdani Abdullah Syamsuriwal, Syamsuriwal Syifa, Aliyya Layyinatu Theo Jhoni Hartanto, Theo Jhoni Tri Hapsari, Anggita Dyah Utama, Irna Marga Vania, Aura Ailsa Vuztasari, Hani Wafiq Mujahidul Haqq Wibowo, Muhammad Wahyu Widyaningtyas, Febrina Siska Wihayati, Wihayati Wisnuputri, Amalia Fadhila Wiwith Eskha Ardhanariswari Wulandari, Anggres Wulandari, Wahyu Nur WULANDARI, WIDYA Wulansari, Septi Yusman Wiyatmo Zakhrofa, Azkiya Zidni, Rafi Zihni, Wilda Eka Ibra Zudhan, Aprisya Haafizhu