PrefaceThe UNNES Physics International Symposium, UPIS 2018 was held in Semarang, Central Java, Indonesia on 3 May 2018 in Conjunction with 32nd National Seminar on Physics - Physical Society of Indonesia (PSI). In the symposium, the researchers from various area in Physics and Physics Educations presented their new findings from their latest works. The event was join-organized by Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Indonesia with Physical Society of Indonesia (PSI).The symposium consisted of plenary sessions and 14 parallel sessions which covers the following topics: Theoretical and Computational Physics, Advanced Materials, Nanoscience and Nanotechnology, Nuclear and Particle Physics, Geophysics, Astrophysics, Instrumentation Physics, Laser and Optoelectronics, Energy and Environmental Physics, Physics Education and Interdisciplinary Physics. The plenary sessions were held in two sessions in which five keynote speakers from five countries shared their valuable knowledge and researches. We hope that this program will expand the mutual understanding and respect in stimulating research in Mathematics, Science, and Education; share research interest and information, and create a form of collaboration to build a trust relationship. We are delighted to be able to show the world what recent developments in the field of physics and its application through this fruitful program.Having been peer-reviewed, the selected papers from 112 papers presented in this forum have been published in Journal of Physics: Conference Series (Institute of Physics Publisher) indexed in some databases, including the Conference citation index, Scopus, Inspec, Chemical s Service, and Astrophysics Data System.List of International Scientific Advisory Board, Organizing Committee and Symposium Photographs are available in this pdf.