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Objective. To acquire more data about the epidemiologic characteristics of constipation in different kinds of populations in China. Methods. Using "constipation" and "China" as search terms; relevant papers were searched from January 1995 to April 2014. Data on prevalence, gender, diagnostic criteria, geographical area, educational class, age, race, and physician visit results were extracted an...

— Many applications of mobile ad hoc networks require real-time data consistency among moving nodes within a geographical area of interest to function correctly, such as those that support disaster recovery and battlefield command and control. While it is operationally desirable to maintain data consistency among nodes within a large geographical area, the time and network resources required to...

Area is generally assumed to affect speciation rates, but work on the spatial context of speciation has focused mostly on patterns of range overlap between emerging species rather than on questions of geographical scale. A variety of geographical theories of speciation predict that the probability of speciation occurring within a given region should (1) increase with the size of the region and ...

OBJECTIVES To describe the method, data collection procedure and participation in The Population-based Study on Health and Living Conditions in Areas with both Sami and Norwegian Settlements - the SAMINOR 2 questionnaire study. STUDY DESIGN Cross-sectional and semi-longitudinal. METHODS In 2012, all inhabitants aged 18-69 and living in selected municipalities with both Sami and Norwegian se...

We study how cultural distance affects the rejection of imposed institutions. To this purpose, we exploit the transplantation of Piedmontese institutions on Southern Italy which occurred during the Italian unification. We assemble a novel and unique dataset containing information on episodes of brigandage, a form of violent uprising against the unitary government, at the municipal level. We use...

It is important to understand urban auto markets from a spatial perspective. Specifically, the question of how to simplify and visualize the relatedness of the complicated urban markets arises. Based on the concept of ‘product space’, this research explores the similarity between Chinese cities and identifies the city clusters using data of automobile sales in 2012. A city’s automobile market i...

The objective of this paper is to develop a conceptual model for client-vendor distance in global IS outsourcing relationships as previous research on this issue is scarce. A multi-dimensional construct is deductively developed deploying the theory of psychic distance as a theoretical lens. A key finding is that client-vendor distance in global IS outsourcing relationships is constituted by sev...

This vignette describes gdistance, an R package which provides functionality to calculate various distance measures and routes in heterogeneous geographic spaces represented as grids. Distances are fundamental to geospatial analysis (Tobler 1970). The most commonly used geographic distance measure is the great-circle distance, which represents the shortest line between two points, taking into a...

Offshore software development projects provoke new issues to the collaborative endeavor of software development due to their global distribution and involvement of various people, processes, and tools. These problems relate to the geographical distance and the associated time-zone differences; cultural, organizational, and process issues; as well as language problems. However, existing tool sup...