During the last decades, high-efficiency farming equipment has been developed in the agricultural sector. This has also included efficiency improvement of moving techniques, which include increased working speeds and widths. Therefore, the risk of wild animals being accidentally injured or killed during routine farming operations has increased dramatically over the years. In particular, the nes...

In the mountainous areas of Japan, weeds on slopes terraced rice paddies still need to be cut by elderly manually. Therefore, more attention should given maintain proper postures while performing mowing actions (especially pre-cutting actions) reduce risk accidents. Given that complex can decomposed into different sub-actions, we proposed a joint angular calculation-based body movement analysis...

Interactions among native and invasive species may affect management outcomes goals. We implemented different mowing regimes to control the Solidago gigantea restore natural diversity, also examined interactions between a European competitor, Tanacetum vulgare in context of these regimes. Experimentally planted suppressed by 79% without management, suite reduced density 80–98% when was absent. ...

Species-rich grasslands that become enriched with nitrogen often suffer decreases in species richness, increases in plant biomass, and invasion by weedy exotic species. Suitable techniques to restore enriched grasslands and reestablish native communities are increasingly needed. Here we report results of a 5-yr experiment in enriched coastal prairie grasslands (Bodega Marine Reserve, Bodega Bay...

In this dissertation, we focus on developing simultaneous localization and mapping (SLAM) algorithms with a robot-centric estimation framework primarily using monocular vision sensors. A primary contribution of this work is to use a robot-centric mapping framework concurrently with a world-centric localization method. We exploit the differential equation of motion of the normalized pixel coordi...