Volume 9 Number 1 (2025) of Jurnal Ilmu dan Inovasi Fisika (JIIF) presents eight peer-reviewed research articles covering diverse topics in physics and its applications.

The articles in this issue explore advancements in carbon quantum dots for bacterial detection, silicon-based photovoltaic development, induced polarization methods for groundwater salinity identification, Arduino-based earthquake monitoring systems, photoluminescence characterization of ZnO crystals, thermoelectric cooling systems for photovoltaic performance enhancement, automated mineral water vending machine prototypes, and hybrid SARIMA-LSTM models for erosion prediction.

These contributions reflect interdisciplinary approaches in materials science, renewable energy systems, geophysics, computational modeling, and applied instrumentation. All manuscripts have undergone a rigorous peer-review process to ensure scientific quality and relevance to the advancement of physics research and innovation.

JIIF continues its commitment to publishing high-quality research in theoretical studies, simulation and modeling, experimental physics, engineering applications, and technological innovation.