Results 11 to 20 of about 1,342,650 (329)

The study of fractals among ecologists - doi: 10.4025/actascibiolsci.v34i1.7701

open access: yesActa Scientiarum: Biological Sciences, 2011
Fractals seemed to have permeated most scientific fields, including ecology. In fact, biodiversity and ecological processes are affected by spatial complexity, and fractals can help understand patterns at multiple scales.
Roger Paulo Mormul   +1 more
doaj   +3 more sources

Corrigendum: Spatial Skills Associated With Block-Building Complexity in Preschoolers [PDF]

open access: goldFrontiers in Psychology, 2021
Xiaoxia Zhang   +4 more
doaj   +2 more sources

Implications of Panarchy for ecosystem service research: the role of system dynamics in service delivery

open access: yesEcology and Society, 2022
Panarchy illustrates the dynamic nature of social-ecological systems and their nestedness and interconnectedness through time and space. Although there have been great advances in ecosystem service (ES) research, it has only rarely integrated dynamic ...
Klara J. Winkler   +9 more
doaj   +1 more source

How Many Gammas? Redefining Hippocampal Theta-Gamma Dynamic During Spatial Learning

open access: yesFrontiers in Behavioral Neuroscience, 2022
The hippocampal formation is one of the brain systems in which the functional roles of coordinated oscillations in information representation and communication are better studied. Within this circuit, neuronal oscillations are conceived as a mechanism to
Matthieu Aguilera   +4 more
doaj   +1 more source

Complex Spatial Query Processing [PDF]

open access: yesGeoInformatica, 2004
The user of a Geographical Information System is not limited to conventional spatial selections and joins, but may also pose more complicated and descriptive queries. In this paper, we focus on the efficient processing and optimization of complex spatial queries that involve combinations of spatial selections and joins. Our contribution is manifold; we
Mamoulis, N, Papadias, D, Arkoumanis, D
openaire   +4 more sources

Complex delay dynamics on railway networks from universal laws to realistic modelling

open access: yesEPJ Data Science, 2018
Railways are a key infrastructure for any modern country. The reliability and resilience of this peculiar transportation system may be challenged by different shocks such as disruptions, strikes and adverse weather conditions. These events compromise the
Bernardo Monechi   +3 more
doaj   +1 more source

Reducing Spatial Data Complexity for Classification Models [PDF]

open access: yes, 2007
Intelligent data analytics gradually becomes a day-to-day reality of today's businesses. However, despite rapidly increasing storage and computational power current state-of-the-art predictive models still can not handle massive and noisy corporate ...
Bogdan Gabrys   +3 more
core   +1 more source

Query processing of spatial objects: Complexity versus Redundancy [PDF]

open access: yes, 1993
The management of complex spatial objects in applications, such as geography and cartography, imposes stringent new requirements on spatial database systems, in particular on efficient query processing. As shown before, the performance of spatial query
A. Braun   +9 more
core   +1 more source

Spatial Frequency and the Performance of Image-Based Visual Complexity Metrics

open access: yesIEEE Access, 2020
There is a wide range of visual and spatial complexity measurement methods that aim to quantify perceived image complexity. While image-based calculation methods (edge detection, image compression, contrast) characterize a digital image, visual ...
Dorukalp Durmus
doaj   +1 more source

Complex Quadrature Spatial Modulation

open access: yesETRI Journal, 2017
In this paper, we propose a spatial modulation (SM) scheme referred to as complex quadrature spatial modulation (CQSM). In contrast to quadrature spatial modulation (QSM), CQSM transmits two complex signal constellation symbols on the real and quadrature spatial dimensions at each channel use, increasing the spectral efficiency.
Manar Mohaisen, Saetbyeol Lee
openaire   +3 more sources

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