We model the dynamics of a variation of the Schelling model for agents described simply by a continuously distributed variable-wealth. Agent movement is not dictated by agent choice as in the classic Schelling model, but by their wealth status. Agents move to neighborhoods where their wealth is not lesser than that of some proportion of their neighbors, the threshold level. As in the case of th...

In this paper we use the nonrepresentable ring E (m) p to introduce public key cryptosystems in noncommutative settings and based on the Semigroup Action Problem and the Decomposition Problem respectively.

At a crossroads, global public health surveillance exists in a fragmented state. Slow to detect, register, confirm, and analyze cases of public health significance, provide feedback, and communicate timely and useful information to stakeholders, global surveillance is neither maximally effective nor optimally efficient. Stakeholders lack a globa surveillance consensus policy and strategy; offic...

Background Intersectoral action is often presented as essential in the promotion of population health and health equity. In Norway, national public health policies are based on the Health in All Policies (HiAP) approach that promotes whole-of-government responsibility. As part of the promotion of this intersectoral responsibility, p...

OBJECTIVE To study the involvement in research, of final year medical students and fresh graduates of Karachi, Pakistan and to identify the factors influencing their interest in medical research. METHODS A cross-sectional, questionnaire based study was conducted in 2007-2008. Five institutes representing the private and public hospitals in the city were selected by cluster sampling. Final yea...

OBJECTIVES To identify epidemiological determinants of the contact behaviour of children and their impact on parental employment, during school closures that took place over the course of the 2009 pandemic influenza (H1N1-2009) in Japan. METHODS A retrospective survey was conducted in Japanese households between October 2009 and May 2010 by administration of a standardized questionnaire. Demo...

In a tapered matched comparison, one group of individuals, called the focal group, is compared to two or more nonoverlapping matched comparison groups constructed from one population in such a way that successive comparison groups increasingly resemble the focal group. An optimally tapered matching solves two problems simultaneously: it optimally divides the single comparison population into no...

The increasing prevalence of chronic disease in Oman is a public health challenge. Available evidence in Oman on physical inactivity, the fourth leading risk factor for chronic disease, calls for urgent action to reduce physical inactivity as part of a key strategy to address chronic disease in Oman. The public health implications of this evidence for Oman are considered in light of recommendat...

The National Center for Chronic Disease Prevention and Health Promotion at the Centers for Disease Control and Prevention funds a program to boost progress in reducing the prevalence and incidence of multiple chronic diseases and their associated risk factors. This article describes the program, State Public Health Actions to Prevent and Control Diabetes, Heart Disease, Obesity and Associated R...

The Community Action and Public Health study explored how Ontario public health practitioners interpret and implement guidance in community action. In-depth interviews were conducted with 107 public health professionals and community members in 6 Ontario health units. This report briefly describes the study methods and presents results pertaining to the measurement of success based on interview...