Rachmadhani, Mirga Maulana, Department of Industrial Engineering, Faculty of Engineering, Universitas Muhammadiyah Sorong Rafek, Abdul Ghani, Universiti Kebangsaan Malaysia Rahadi, Slamet, Universitas Muhammadiyah Yogyakarta Rahayu, Gati, Universitas Muhammadiyah Yogyakarta Rahman, Khukuh Aulia, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta Rahman, M. Budi Nur, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta Rahman, Muh Budi Nur, Universitas Muhammadiyah Yogyakarta Rahman, Muhammad Budi Nur, Departement of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta Rahman, Muhammad Budi Nur, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta Rahman, Muhammad Budi Nur, Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Yogyakarta Rahman, Muhammad Budi Nur, Universitas Muhammadiyah Yogyakarta Rahmatullah, Ade, Universitas Muhammadiyah Yogyakarta Rahmawati, Anita, Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Yogyakarta Rahmawati, Anita, Transportasi, Teknik Transportasi dan jalan, Bantul, yogyakarta Rahmawati, Anita, Universitas Muhammadiyah Yogyakarta Rahmayanti, Novi, Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia Rahmi, Aidhia, Program Studi Pendidikan Fisika, STKIP PGRI Sumatera Barat Ramadhan, Fachri, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta Ramadhan, Misbahul, Department of Disaster Management and Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Aceh Ramadhan, Ray S, Universitas Muhammadiyah Yogyakarta Ramadhan Saragih, Surya Budi Lesmana ,, Universitas Muhammadiyah Yogyakarta Ramadhani, Fithrio Manggala, Universitas Muhammadiyah Yogyakarta Ramadoni Syahputra, Agus Jamal ,, Universitas Muhammadiyah Yogyakarta Ramanti, Ristacya Devi, Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Yogyakarta Ramdani, Deny Fajrur, Universitas Muhammadiyah Yogyakarta Ramdhani, Muhammad Zaki, Program Studi Klimatologi, Fakultas Klimatologi, Sekolah Tinggi Meteorologi Klimatologi dan Geofisika Randisyah, Julian, Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Yogyakarta Rauf, Wawan, Jurusan Mesin, Fakultas Teknik, Universitas Gorontalo, Gorontalo Respati, Badrahini Masajeng, Universitas Muhammadiyah Yogyakarta Ridlo, M. Rasyid, Program Studi Teknik Mesin, Fakultas Teknik, Universitas Bengkulu Ridlwan, M. Rifai, Ahmad, Universitas Gadjah Mada Rifa’i, Ahmad, Universitas Gadjah Mada Rinaldi, Hanif, Program Studi Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret, Surakarta Risman, Helda, Defense Doctoral Program, Faculty of Defense Strategy, Indonesia Defense University Riswanto, Riswanto, Universitas Muhamamdiyah Yogyakarta Riyadi, Slamet, Universitas Muhammadiyah Yogyakarta Riyanta, Bambang, Universitas Muhammadiyah Yogyakarta Riyanto, Dwi, Universitas Muhammadiyah Yogyakarta Riyanto, Eko, Purworejo Muhammadiyah University Riyanto, Eko, Universitas Muhammadiyah Purworejo Riza, Muhammad Akhid, Universitas Muhammadiyah Yogyakarta Robbika, Fadzkurisma, Department of Leather Processing Technology, Politeknik ATK, Bantul Rofarsyam, Rofarsyam, Politeknik Negeri Semarang Rofiq, Ainur, Universitas Muhammadiyah Yogyakarta Rohermanto, Agus, Politeknik Negeri Pontianak Rohmat, Tri Agung, Universitas Gadjah Mada Yogyakarta Rojikin, Rojikin, Mechanical Engineering, Politeknik Purbaya Rokhmat, Tri Agung, Universitas Muhammadiyah Yogyakarta Rosidi, Ainur, Pusat Riset dan Teknologi Reaktor Keselamatan dan Keamanan Nuklir, Badan Riset dan Inovasi Nasional (BRIN) Rosyidi, Sri Atmaja P, Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Yogyakarta Rosyidi, Sri Atmaja P, Universitas Muhammadiyah Yogyakarta Rosyidi, Sri Atmaja P., Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta Rosyidi, Sri P. Atmaja, Universitas Muhammadiyah Yogyakarta Ruhaidani, Emma, Universitas Muhammadiyah Banjarmasin Rustendi, Iwan, Program Studi Teknik Sipil, Fakultas Teknik, Universitas Wijayakusuma Purwokerto Ruswanto, Dwi Isnaini, Universitas Muhammadiyah Yogyakarta