Soka University

Spectral signatures of zenith sky radiance from surface-based sky radiometers: implications for clear- and cloudy-sky detection

Abstract. Accurate identification of clear- and cloudy-sky conditions is essential for reliable aerosol and cloud retrievals from ground-based remote sensing observations. This study investigates the spectral characteristics of zenith radiances measured by SKYNET sky radiometers...

A review of open-vocabulary semantic mapping and navigation with foundation models for mobile robots

Autonomous mobile robots that coexist with humans must construct not only geometric maps but also semantic maps that can be accessed through natural language. Conventional semantic mapping has mainly focused on assigning labels from predefined closed vocabularies to metric maps,...

Life Cycle Greenhouse Gas Emissions of Water Hyacinth-Derived Biochar for Fuel and Soil Amendment Applications: Japanese Model Applied to Ethiopian Context

This study assesses life cycle greenhouse gas (GHG) emissions from water hyacinth (Pontederia crassipes; WH) biochar production and its subsequent use as fuel or soil amendment in Ethiopia. Overgrowth of WH in Lake Tana has created ecological and socioeconomic challenges, while t...