Counting Integer flows in Networks

This paper discusses new analytic algorithms and software for the enumeration of all integer flows inside a network. Concrete applications abound in graph theory \cite{Jaeger}, representation theory \cite{kirillov}, and statistics \cite{persi}. Our methods clearly surpass traditional exhaustive enumeration and other algorithms and can even yield formulas when the input data contains some parameters. These methods are based on the study of rational functions with poles on arrangements of hyperplanes

Going green: does it depend on education, gender, or income?

Sustainable development entails meeting our present needs without compromising the ability of future generations to meet their needs. This requires us to treat economic, social and environmental aspects in an integrated way, but little is known about the nature of individual preferences towards the trade-offs involved in this effort. For the first time, we study individual preferences towards the environment, social wellbeing, and financial wellbeing using a survey of over 1400 households in the Netherlands. Using nonparametric, parametric, and matching methods, we find that gender and education are important factors for sustainability rather than income levels. Moreover results indicate that educated females put the greatest value on going green whilst being socially minded.Sustainability, financial wellbeing, heterogenous preferences

Spontaneous CP violation in the 3-3-1 model with right-handed neutrinos

We implement the mechanism of spontaneous CP violation in the 3-3-1 model with right-handed neutrinos and recognize their sources of CP violation. Our main result is that the mechanism works already in the minimal version of the model and new sources of CP violation emerges as an effect of new physics at energies higher than the electroweak scale.Comment: Major changes in the quark sector, electronic dipole moment of the neutron was evaluated, accepted for publication in the physical review

Asymmetrical bloch branes and the hierarchy problem

We investigate a two scalar fields split braneworld model which leads to a possible approach to the hierarchy problem within the thick brane scenario. The model exhibits a resulting asymmetric warp factor suitable for this purpose. The solution is obtained by means of the orbit equation approach for a specific value of one of the parameters. Besides, we analyze the model qualitative behaviour for arbitrary parameters by inspecting the underlying dynamical system defined by the equations which give rise to the braneworld model. We finalize commenting on the metric fluctuation and stability issues.Comment: 8 pages, 7 figure