The group of causal automorphisms

The group of causal automorphisms on Minkowski space-time is given and its structure is analyzed

International Fisheries Agreements: The Feasibility and Impacts of Partial Cooperation

This paper deals with partial cooperation among countries involved in the exploitation of straddling and highly migratory fish stocks.We analyse the feasibility of coalition structures and their impacts on fishing e.orts by means of games in partition function form.Furthermore, we demonstrate that the modified Shapley value is an appropriate device for the division of the gains from cooperation.international fisheries;overexploitation;partial cooperation;games in partition function form;competitive equilibrium;modified Shapley value.

Feasibility and Acceptability of an English-as-a-Second Language Curriculum on Hepatitis B for Older Chinese American Immigrants

Asian immigrants to the U.S. have an increased prevalence of hepatitis B virus (HBV) infection compared to native born individuals; an estimated 10 percent of Chinese immigrants are infected with HBV. Using qualitative data from focus groups, we developed an English-as-a-Second Language (ESL) curriculum that aimed to improve knowledge about key hepatitis B facts. The curriculum was pilot-tested among 56 students aged 50 and older from intermediate-level ESL classes at a community-based organization that serves Chinese immigrants. Post-curriculum data showed increases in knowledge that hepatitis B can cause liver cancer (73% at pre-test vs. 91% at post-test; p value = 0.01) and that individuals can be infected with hepatitis B for life (34% vs. 81%; p valu

Transboundary Fishery Management: A Game Theoretic Approach

A basic issue in transboundary fishery management is the new member problem. In this paper we address the problem of allocating the profits between the charter members and the entrants, once the nations concerned have expressed an interest in achieving an agreement.Using game theory we argue that in the case of independent countries adjustment from the Nash equilibrium can be achieved by means of the proportional rule.Furthermore, we propose the population monotonic allocation scheme as management rule for division of profits within a coalition. Finally, we show that the equal division of the net gain value can be used to expand a coalition.game theory;fishing industry;Nash equilibrium

Ground states of nonlocal scalar field equations with Trudinger-Moser critical nonlinearity

We investigate the existence of ground state solutions for a class of nonlinear scalar field equations defined on whole real line, involving a fractional Laplacian and nonlinearities with Trudinger-Moser critical growth. We handle the lack of compactness of the associated energy functional due to the unboundedness of the domain and the presence of a limiting case embedding.Comment: 13 page

Nonautonomous fractional problems with exponential growth

We study a class of nonlinear non-autonomous nonlocal equations with subcritical and critical exponential nonlinearity. The involved potential can vanish at infinity.Comment: 12 page