Background Given that the protection of children's health is of special importance due to their special age and physical conditions, the present study aimed to investigate the condition of children's Geographic access to health services (Health Centers and Clinical Laboratories) in Kermanshah city, Iran. Materials and Methods: In this applied study, the research approach was descriptive-analyti...

We analyze competition between vertically integrated infrastructure operators that provide access in different geographical areas. A regulator may impose a uniform access price, set local access rates, or deregulate access locally. We analyze the impact of these alternative regulatory regimes on network investments. While cost-based access leads to both suboptimal rollout and duplication, unifo...

Many geographic information systems (GISs) attempt to imitate the manual process of laying transparent map layers over one another on a light table and analyzing the resulting configurations. While this map-overlay metaphor, familiar to many geo-scientists, has been used as a design principle for the underlying architecture of GISs, it has not yet been visually manifested at the user interface....

The problem of access control in databases consists of determining when (and if) users or applications can access stored data, and what kind of access they are allowed. This paper discusses this problem for geographic databases, where constraints imposed on access control management must consider the spatial location context. The model and solution provided are motivated by problems found in AM...

OBJECTIVE Optimal care of adults with severe acute respiratory failure requires specific resources and expertise. We sought to measure geographic access to these centers in the United States. DESIGN Cross-sectional analysis of geographic access to high capability severe acute respiratory failure centers in the United States. We defined high capability centers using two criteria: (1) provision...