morphophysiological variations of field bindweed populations in tehran province was studied during 2006 and 2007 growing seasons using multivariate analysis methods. to determine the variations, 43 morphological and physiological characters were considered biometrically.  the main characters at principal component analysis (pca) consisted of leaf dry weight, shoot dry weight, and leaf area to i...

Previously, we observed that without using prior information about individual sampling locations, a clustering algorithm applied to multilocus genotypes from worldwide human populations produced genetic clusters largely coincident with major geographic regions. It has been argued, however, that the degree of clustering is diminished by use of samples with greater uniformity in geographic distri...

eight samples of flowering tops from six species of the genus crataegus l., commonly called hawthorn, from different geographic locations of iran were standardized according to german pharmacopoeia monograph on crataegi folium cum flore (hawthorn leaf with flower) by high-performance thin-layer chromatograph-ic (hptlc) fingerprinting combining with digital scanning profiling of their major poly...

Nowadays, millions of landscape images are uploaded on photosharing platforms such as Flickr or Panoramio. More and more of these images are also accurately geotagged via GPS devices mounted on personal cameras. Each image results from a twofold spatial choice: the choice of the location and the choice of the picture subject. In this study, our focus is on landscape images in large touristic ar...

Determining the geographic focus of digital media is an essential first step for modern geographic information retrieval. However, publicly-visible location annotations are remarkably sparse in online data. In this work, we demonstrate a method which infers the geographic focus of an online document by examining the locations of Twitter users who share links to the document. We apply our geotag...

This paper aims to provide some insights into geographic environments based on our studies using various small world models. We model a geographic environment as a network of interacting objects not only spaces, places and locations, but also vehicles and pedestrians acting on it. We demonstrate how geographic environments might be represented as a form of networks and be illustrated as small w...

In this paper we identify location names that appear in queries written in Indonesian using geographic gazetteer. We built the gazetteer by collecting geographic information from a number of geographic resources. We translated an Indonesian query set into English using a machine translation technique. We also made an attempt to improve the retrieval effectiveness using a query expansion techniq...

In this paper we identify location names that appear in queries written in Indonesian using geographic gazeeter. We built the gazeeter by collecting geographic information from a number of geographic resources. We translated an Indonesian query set into English using a machine translation technique. We also made an attempt to improve the retrieval effectiveness using a query expansion technique...

Two main problems prevent the deployment of geographic forwarding in real systems: geographic forwarding requires that all nodes know their locations, and it has trouble routing around local dead ends. This paper presents practical solutions to each problem. The location proxy technique allows a node that does not know its location to find a nearby location aware node to use as a proxy for geog...