To investigate the possible role of landscape connectivity on the genetic structure of isolated populations, we examined the effects of habitat corridors on the population genetics of a vagile butterfl y species, Junonia coenia, within a largescale, experimental system. Using allozyme electrophoresis, a total of nine loci were identifi ed and scored, six of which exhibited polymorphism. Our dat...

We focus on the construction of confidence corridors for multivariate nonparametric generalized quantile regression functions. This construction is based on asymptotic results for the maximal deviation between a suitable nonparametric estimator and the true function of interest which follow after a series of approximation steps including a Bahadur representation, a new strong approximation theo...

Adding new corridors to a highway network represents a multicriteria decision process in which a variety of social, environmental and economic factors must be evaluated and weighted for a large number of corridor alternatives. This paper proposes a new bi-level continuous location model for expansion of a highway network by adding several highway corridors within a geographical region. The uppe...

This article presents a new algorithm to recognize natural distinctive places such as corridors, halls, narrowings, corridors with open doors on the left side etc., from indoor environments using Hidden Markov Models. The environment is modelled as a graph. This graph is obtained from a Voronoi Diagram from measurements of laser scanner. The characteristics of Voronoi Diagram (nodes, number of ...

The massive growth of some urban areas has led to new constellations of urban forms. New concepts describing large urban areas have been introduced but are not always defined and mapped sufficiently and consistently. This article describes urban corridors as an example of such a concept with an ambiguous spatial definition. Based on the existing usage of the concept in scientific literature and...

Mobile robots operating in dynamic ooce environments need robust navigation algorithms capable of dealing with uncertainties arising from sensor and actuator errors. Such algorithms also need to be able to synthesize plans that take into account temporal aspects of their environment, such as crowded corridors, and busy intersections. This paper describes a novel mobile robot navigation architec...

Overwhelming evidence points to the importance of maintaining connectivity given rapidly fragmenting habitats and climate change. Many efforts identify where ecological corridors should be placed are based on estimates structural that take advantage readily available land-cover data. We provide an overview methodology review various limitations these methods for functional -- degree which facil...

Bennett, Victoria J.; Smith, Winston P.; Betts, Matthew G. 2011. Toward understanding the ecological impact of transportation corridors. Gen. Tech. Rep. PNW-GTR-846. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 40 p. Transportation corridors (notably roads) affect wildlife habitat, populations, and entire ecosystems. Considerable effort has b...

Fragmentation and reduced continuity of habitat patches threaten the environment and biodiversity. Recently, ecological networks are increasingly attracting the attention of researchers as they provide fundamental frameworks for environmental protection. This study suggests a set of procedures to construct an ecological network. First, we proposed a method to construct a landscape resistance su...

Determining how widespread human-induced changes such as habitat loss, landscape fragmentation, and climate instability affect populations, communities, and ecosystems is one of the most pressing environmental challenges. Critical to this challenge is understanding how these changes are affecting the movement abilities and dispersal trajectories of organisms and what role conservation planning ...