Agriculture Electrification, Emerging Technologies, Trends and Barriers: A Comprehensive Literature Review Analysis of Experimental Data from Household Off-Grid System in Latvia Calculations of Basic Geometric Parameters for Mobile Space Environment Simulation Facility “Metamorphosis” A Comprehensive Overview of the Europen and Baltic Landscape for Hydrogen Applications and Innovations Evaluation of Heat Pump Operation in a Single-Family House Study of the Performance of a Photovoltaic Solar Panel by Using a Nanofluid as a Cooler Development of Unified Hybrid WDM-PON With Spectrally Hidden Data Channel System and FBG Optical Sensor Network