Synthesized technical and socio-economic efficient evaluation of water quality improving devices and technologies: an example of the lake Kasumigaura Basin

In this study, we analyze an optimal policy and evaluate new devices and technologies to improve the water quality of Lake Kasumigaura, considering both - the total ecological system in and around the lake and the socio-economic situational changes over a certain period of time. The optimal policies are derived so as to maximize the objective function (GRP) subject to the structural equations, which describe both the ecosystem and socio-economic system.

An Optimal Investment Policy to Control the Land-based Water Pollutant into the Sea of Japan

Northeast Asia countries (e.g. around the Sea of Japan area) cooperate in economic and environmental policies, etc., because the comprehensive problems like the climate change and global warming occur in recent years. The ring Sea of Japan area consists of Japan, Republic of Korea, China, and Far East Russia in Northeast Asia, and the countries have to join forces in order to control the ocean environment and attain the sustainable development in the region. In this study, we try to evaluate the policy measure to control the land-based water pollutant into the Sea of Japan through a system simulation approach. The system simulation model is formulated a definition of an objective function and the structure of water pollutants inflow and the socio-economic system of the target countries and regions of the ring Sea of Japan. We present an optimal international policy for environmental investment taking account of economic situations and environmental influences of this area over a certain period of time through the dynamic simulation.

Human Activities of Costal Area and Land-Based Water Pollutant into the Sea of Japan

Ocean Polocy Research FoundationPromoting Environmental Pesearch in Pan-Japan Sea Area : Young Researchers\u27 Network, Schedule: March 8-10,2006,Kanazawa Excel Hotel Tokyu, Japan, Organized by: Kanazawa University 21st-Century COE Program, Environmental Monitoring and Prediction of Long- & Short- Term Dynamics of Pan-Japan Sea Area ; IICRC(Ishikawa International Cooperation Research Centre), Sponsors : Japan Sea Research ; UNU-IAS(United Nations University Institute of Advanced Studies)+Ishikawa Prefecture Government ; City of Kanazaw

Energy band bending induced charge accumulation at fullerene/bathocuproine heterojunction interface

The electronic properties of fullerene (C60)/bathocuproine (BCP)/Ag heterostructures were studied as a function of the BCP layer thickness by photoemission spectroscopy. For the thin BCP layer, the energy levels are flat and gap states exist at the interface. In contrast, energy band bending occurs at the C60/BCP interface when the BCP layer is thick, resulting in a considerable barrier for electron transport and therefore causing charge accumulation in organic solar cells. The results reveal that a thin BCP layer gives a much more favorable energy level structure and conform that charge accumulation is responsible to the anomalous current-voltage (I-V) curve