Korean ginseng has been used for thousands of years as an important medicinal plant. Lime-Bordeaux mixture (LBM) was made with copper sulfate and quicklime, which was sprayed instead of pesticides in ginseng field. Net photosynthesis (PN) was compared between Treatment and Non-treatment of LBM in 3 Year Old Ginseng. PN in control plot recorded 2.94μmol (CO2) m-2s-1 at the first day of experiment, which was similar until the last day of experiment. However, The PN in LBM recorded 2.23μmol (CO2) m-2s-1, which was lower than that in control plot. As time goes by, The PN in LBM was gradually increased up to 3.21μmol (CO2) m-2s-1 and finally, it was similar with that in control plot at 7th day as a 3.20μmol (CO2) m-2s-1).

Ship manoeuvring simulator has been widely utilized for training mariners, for assessing safety, for developing harbour and port, and for designing ships. We discuss a ship manoeuvring simulator which has been newly developed by Korea Maritime University. We briefly explain the computer network system connected with each other, the interface system between computers and navigational instruments, the mathematical model of ship manoeuvring motion in harbour areas, and also ship and terrain modeling technique. Finally using the simulator an experiment of distance cognition and a real time simulation of berthing/deberthing manoeuvre carried out and the results are shown.