We present the first algorithm to compute the geodesic Fréchet distance between two polygonal curves in a plane with polygonal obstacles, where distances between points are measured as the length of a shortest path between them. Using shortest path structures that we call dynamic and static spotlights, we efficiently construct and propagate reachability information through the free space diagra...

Internal transcribed spacer (ITS) region of nuclear ribosomal DNA from 16 populations of Persicaria barbata (L.) H. Hara (Polygonaceae) belonging to five geographical locations of India (Arunachal Pradesh, Himachal Pradesh, Bihar, Karnataka and Andaman Island) was sequenced. Analysis of nucleotide sequences reveals polymorphism among the populations. UPGMA analysis conducted on the ITS datasets...

This paper provides the first evidence of geographic concentration of foreign visitors in Japan, using a new data on nights spent by foreign visitors in each region. Using locational Gini coefficients, I show that foreign visitors are more geographically concentrated than Japanese visitors and the level of geographical concentration vary across source countries. In addition, I employ gravity eq...

This paper develops a novel technique for studying the effectiveness of product development organizations that conduct concurrent engineering. It is commonly argued that to create better products more quickly, the degree of coordination among team members must be enhanced. However, barriers to communication exist across organizational, cultural, and geographical boundaries in dispersed product ...

There are projected shortages in the supply of dentists in Australia, and these shortages are likely to be more evident in areas outside of capital cities. This report explores the geographic distribution of dentists and the differences in supply of dental services to regions defined by remoteness. Remoteness may be thought as the travel time to obtaining goods and services. Australian Statisti...

This paper presents an indexing technique based on WordNet synonyms and holonyms. This technique has been developed for the Geographical Information Retrieval task. It may help in finding implicit geographic information contained in texts, particularly if the indication of the containing geographical entity is omitted. Our experiments were carried out with the Lucene search engine over the GeoC...

The genetic population of Triatoma sordida group 1, a secondary vector of Chagas disease in Bolivia, was studied by multi-locus enzyme electrophoresis. A total of 253 nymphal and adult specimens collected from seven neighbouring localities in the Velasco Province, Department of Santa Cruz, were processed. The relatively low genetic variability was confirmed for this species (rate of polymorphis...

In geographical routing, each node takes the data forwarding decision based on the location information of its one-hop neighbors. Dissemination of location information is the key function of the geographic routing. The location error due to the node mobility models has direct impact on the geographical routing. Node mobility is a great challenge to the beacon based location broadcasting schemes...

Voronoi diagram on the earth surface is a powerful tool to study spatial proximity at continental or global scale. However, its computation remains challenging because geospatial features have complex shapes. This paper presents a raster-based algorithm to generate Voronoi diagrams on earth's surface. The algorithm approximates the exact point-to-point geographical distances using the cell-to-c...