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.

Modular symmetry and non-Abelian discrete flavor symmetries in string compactification

We study the modular symmetry in magnetized D-brane models on $T^2$. Non-Abelian flavor symmetry $D_4$ in the model with magnetic flux $M=2$ (in a certain unit) is a subgroup of the modular symmetry. We also study the modular symmetry in heterotic orbifold models. The $T^2/Z_4$ orbifold model has the same modular symmetry as the magnetized brane model with $M=2$, and its flavor symmetry $D_4$ is a subgroup of the modular symmetry.Comment: 28 page

A complete and operational resource theory of measurement sharpness

We construct a resource theory of sharpness for finite-dimensional positive operator-valued measures (POVMs), where the sharpness-non-increasing operations are given by quantum preprocessing channels and convex mixtures with POVMs whose elements are all proportional to the identity operator. As required for a sound resource theory of sharpness, we show that our theory has greatest (i.e., sharpest) elements, which are all equivalent, and coincide with the set of POVMs that admit a repeatable measurement. Among the greatest elements, conventional non-degenerate observables are characterized as the minimal ones. More generally, we quantify sharpness in terms of a class of monotones, expressed as the EPR--Ozawa correlations between the given POVM and an arbitrary reference POVM. We show that one POVM can be transformed into another by means of a sharpness-non-increasing operation if and only if the former is sharper than the latter with respect to all monotones. Thus, our resource theory of sharpness is complete, in the sense that the comparison of all monotones provide a necessary and sufficient condition for the existence of a sharpness-non-increasing operation between two POVMs, and operational, in the sense that all monotones are in principle experimentally accessible.Comment: 23 pages, 1 figur

Dynamic Compliance of Pile Group Considering Nonlinear Behavior Around Piles

Static and dynamic loading test of a foundation are carried out to obtain the behavior of a pile and a pile group. A conventional analysis based on the elastic wave theory are modified to obtain the complex rigidity of a pile group and are compared with the test results. It is shown that the analysis based on the conventional elastic wave theory are not enough to predict the dynamic behavior of piles since they do not take into account both the effect of slip and/or separation between the pile surface and the surrounding ground and the nonlinear behavior of the ground near the pile. An element to be put between the pile and surrounding ground is proposed so as to improve the analysis. The characteristics of the new element is represented as a compliance function which can be obtained from a static loading test of single pile

F-term Moduli Stabilization and Uplifting

We study K\"ahler moduli stabilization in IIB superstring theory. We propose a new moduli stabilization mechanism by the supersymmetry-braking chiral superfield which is coupled to K\"ahler moduli in K\"ahler potential. We also study uplifting of the Large Volume Scenario (LVS) by it. In both cases, the form of superpotential is crucial for moduli stabilization. We confirm that our uplifting mechanism does not destabilize the vacuum of the LVS drastically.Comment: 22 pages, 2 figure

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

Quantitative Evaluation of the Past Recycling-oriented Society in Japan: An Analysis of the Edo System in the Late 19th Century

This study focused on the Edo city and the basin of the Tokyo bay in the late 19th century. Edo is the former name of Tokyo, Japan, and was the central political city in the Edo period, which was from 1603 to 1868. In 1603 the Shogunate Government of Edo was formed, and the Edo period was ruled through a feudal system for all of its 265 years. Edo had over one million populations and high levels of consumption at the end of the Edo period, however, it is thought that the water environment of the city area and the Tokyo bay basin was unpolluted, and various and abundant marine resources had existed at that time. The reason is that the sustainable society was realized by means of the human wastes recycling system in the Edo society. In this study, we try to make a quantitative analysis of the "Edo system" from the viewpoint of the socio-economic and environmental aspects