We describe strong convex valid inequalities for conic quadratic mixed 0-1 optimization. The inequalities exploit the submodularity of the binary restrictions and are based on the polymatroid inequalities over binaries for the diagonal case. We prove that the convex inequalities completely describe the convex hull of a single conic quadratic constraint as well as the rotated cone constraint ove...

abstract nowadays information plays an important role in the development process of societies so that the usage of related technologies such as ict can speed up this process by preparing cheap and effective instruments and changing working and living styles. the aim of this paper is to investigate the main determinants of information and communication technology (ict) adoption in 18 selected as...

BACKGROUND The Department of Health is encouraging health authorities to improve health status by tackling health inequalities. We defined ward level spatial health variations in Trent National Health Service Region, England, investigated urban and rural inequalities, and examined the relationship with deprivation, to identify the extent of small area health inequalities and to establish whethe...

OBJECTIVE To explore and describe inequalities in health and use of health care as revealed by self-report in 12 countries of Latin America and the Caribbean. METHODS A descriptive and exploratory study was performed based on the responses to questions on health and health care utilization that were included in general purpose household surveys. Inequalities are described by quintile of house...

It is well known that the Wiener-Hopf equations are equivalent to the general variational inequalities. We use this alternative equivalent formulation to study the sensitivity of the general variational inequalities without assuming the differentiability of the given data. Since the general variational inequalities include classical variational inequalities and complementarity problems as speci...

BACKGROUND The prevalence of obesity increased dramatically in many European countries in the past decades. Whether the increase occurred to the same extent in all socioeconomic groups is less known. We systematically assessed and compared the trends in educational inequalities in obesity in 15 different European countries between 1990 and 2010. METHODS Nationally representative survey data f...

The Brunn-Minkowski inequality theory plays an important role in a number of mathematical disciplines such as measure theory, crystallography, optimal control theory, functional analysis, and geometric convexity. It has many useful applications in combinatorics, stochastic geometry, and mathematical economics. In recent years, several authors including Ball [1, 2, 3], Bourgain and Lindenstrauss...

Following an active period of policy development and implementation in the 1990s,1 there have been two national great leaps forward that tackled geographical health inequalities in Australia in the new century. In 2000, in the context of growing disaffection in the rural electorate,2 the then health minister, Michael Wooldridge, was responsible for a federal Budget centrepiece of $562 million, ...

BACKGROUND Birth registration, and the possession of a birth certificate as proof of registration, has long been recognized as a fundamental human right. Data from a functioning civil registration and vital statistics (CRVS) system allows governments to benefit from accurate and universal data on birth and death rates. However, access to birth certificates remains challenging and unequal in man...