نتایج جستجو برای: topographic complexity

تعداد نتایج: 333103  

Journal: :Remote Sensing 2022

Advances in image-based remote sensing using unmanned aerial vehicles (UAV) and structure-from-motion (SfM) photogrammetry continue to improve our ability monitor complex landforms over representative spatial temporal scales. As with other water-worked environments, coastal sediments respond shaping processes through the formation of multi-scale topographic roughness. Although this complexity c...

2016
Leonardo M. Neves Tatiana P. Teixeira-Neves Guilherme H. Pereira-Filho Francisco G. Araújo

The conservation and management of site-attached assemblages of coastal reefs are particularly challenging because of the tremendous environmental variation that exists at small spatial scales. In this sense, understanding the primary sources of variation in spatial patterns of the biota is fundamental for designing effective conservation policies. We investigated spatial variation in fish asse...

2015
Michel F. Randrianandrasana Shahzad Mumtaz Ian T. Nabney

Heterogeneous and incomplete datasets are common in many real-world applications. The probabilistic nature of the Generative Topographic Mapping (GTM), which only handles complete continuous data originally, offers the ability to extend it to also visualise mixed-type and missing data as suggested in (Bishop et al., 1998a). This paper describes this generalisation of GTM and assesses the result...

2010
Elaine Farndale Hugh Scullion Paul Sparrow

We currently know little of the role of the corporate human resource (HR) function in multinational corporations regarding global talent management (GTM). GTM is explored here from two perspectives: increasing global competition for talent, and new forms of international mobility. The first considers the mechanisms of GTM, and the second, individual willingness to be mobile, especially in emerg...

2009
Santiago Planet Ignasi Iriondo Sanz Joan Claudi Socoró Carlos Monzo Jordi Adell

This paper describes our participation in the INTERSPEECH 2009 Emotion Challenge [1]. Starting from our previous experience in the use of automatic classification for the validation of an expressive corpus, we have tackled the difficult task of emotion recognition from speech with real-life data. Our main contribution to this work is related to the classifier sub-challenge, for which we tested ...

2008
Reuven Meth Rama Chellappa

Automatic classiication of target in synthetic aperture radar (SAR) imagery is performed using topographic features. Targets are segmented from wide area imagery using a constant false alarm rate (CFAR) detector. Individual target areas are classiied using the Topographical Primal Sketch (TPS) 2 which assigns each pixel a label that is invariant under monotonic gray tone transformations. A loca...

2003
Mathieu KOEHL Pierre GRUSSENMEYER

The acquisition of 3D data and their integration in information systems which are mainly used for topographic issues are very increasing in the last years. The enlarged needs in 3D information appear with the development of the complexity of the processings in topographic information systems. The middle-sized and big cities, which have a large extent, have also important care for fitting out an...

2016
Isa-Rita M. Russo Catherine L. Sole Mario Barbato Ullrich von Bramann Michael W. Bruford

Small mammals provide ecosystem services, acting, for example, as pollinators and seed dispersers. In addition, they are also disease reservoirs that can be detrimental to human health and they can also act as crop pests. Knowledge of their dispersal preferences is therefore useful for population management and landscape planning. Genetic data were used alongside landscape data to examine the i...

2017
Víctor Noguerales Pedro J Cordero Joaquín Ortego

Understanding the processes underlying spatial patterns of genetic diversity and structure of natural populations is a central topic in evolutionary biogeography. In this study, we combine data on ancient and contemporary landscape composition to get a comprehensive view of the factors shaping genetic variation across the populations of the scrub-legume grasshopper (Chorthippus binotatus binota...

Journal: :Ecology 2010
Melanie A Murphy Jeffrey S Evans Andrew Storfer

A major objective of ecology is to understand how ecological processes limit population connectivity and species' distributions. By spatially quantifying ecological components driving functional connectivity, we can understand why some locally suitable habitats are unoccupied, resulting in observed discontinuities in distribution. However, estimating connectivity may be difficult due to populat...

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