Search results for "Spatial"

Effectiveness of using EU funds in modelling the public and private spaces - examples of good practice

2015

Od ponad dekady, Polska jako kraj oraz jej obywatele jako osoby fizyczne czy też prawne, mają coraz szerszy dostęp do korzystania z funduszy unijnych na realizację przedsięwzięć związanych szeroko pojętym zagospodarowaniem przestrzeni. Wyniki analizy przykładów tzw. dobrych praktyk potwierdzają postawioną tezę, iż szeroko pojęta efektywność zrealizowanych przedsięwzięć zasadniczo różni się w segmencie przestrzeni publicznej w stosunku do realizacji projektów przez interesariuszy prywatnych. Ponad to widoczna jest wyraźna dwubiegunowość w modelowaniu zarówno przestrzeni publicznej jak i prywatnej na terenach miejskich w porównaniu do obszarów wiejskich.

Simuler les changements de localisations résidentielles dans une agglomération. Les bases conceptuelles d'un modèle de choix

2010

International audience; L'idée explorée dans la thèse est que le choix d'une localisation résidentielle résulte de l'interaction entre facteurs de choix et de propension à l'action. Distinguer ces deux facteurs permet d'aborder le processus décisionnel dans son caractère dynamique. L'objectif principal est de concevoir un modèle de simulation des dynamiques de localisations résidentielles et, à partir de là, d'interroger l'influence de la diversité des comportements modélisés sur les configurations spatiales simulées. Nous projetons de calculer un très grand nombre de scénarios (500, 1000...), afin de déterminer les plages de variations des configurations spatiales résultantes (analyses de …

La décision spatiale, entre choix individuels et références collectives

2012

Simulation individu-centrée des mobilités résidentielles à l'aide d'un modèle dynamique prospectif (Mobisim)

2013

International audience; Dans un contexte de périurbanisation et de difficultés d'accès au logement pour certains types de ménages, la connaissance des choix résidentiels représente un enjeu majeur pour l'aménagement du territoire. La compréhension des dynamiques résidentielles et des phénomènes qui en résultent constitue un champ de recherche important, et a donné lieu au développement de nombreux outils de simulation (Raju et al. 1998; Benenson et al. 2002; Ettema et al.2011; Sener et al. 2011). Ces derniers permettent de reproduire les dynamiques ur- baines, en considérant différents scénarios de développement urbain.

Ecosystem rescue : when protection is not enough

2015

Spatial Ability and Learning to Program

2008

Results in introductory computer programming modules are often disappointing, and various individual differences have been found to be relevant. This paper reviews work in this area, with particular reference to the effect of a student’s spatial ability. Data is presented on a cohort of 49 students enrolled on an MSc in Information Technology course at a university in the UK. A measure was taken of their mental rotation ability, and a questionnaire administered that focused on their previous academic experience, and expectations relating to the introductory computer programming module they were studying. The results showed a positive correlation between mental rotation ability and success i…

Otolith chemical composition suggests local populations of Antarctic silverfish Pleuragramma antarctica (Boulenger, 1902) around Antarctica are expos…

2021

The Antarctic silverfish Pleuragramma antarctica is a key species in the Southern Ocean ecosystem, and it is potentially threatened by the climate change affecting Antarctic ecosystems. Assessing the possible exposure to similar or different environmental conditions at early life stages and gathering information about connectivity or segregation between local populations of P. antarctica can be key for planning sound management strategies for this species. By using Laser Ablation Inductively Coupled Plasma Mass Spectrometry, we characterized the otolith chemical composition of 163 adult Antarctic silverfish collected from three areas located thousands of kilometers apart from each other: Ca…

Seed dispersal, braeding system, tree density and the spatial pattern of trees – a simulation approach

2002

Summary Tropical tree populations with low densities and with clumped spatial distributions are at risk in the face of fragmentation. It is therefore important to understand factors driving spatial patterns of tree populations. An important set of factors which may influence the spatial pattern of plants, could be the spatial distribution of possible seed sources such as the breeding system (monoecious, dioecious), tree density and the spatial pattern of the parent population. Another set of important factors might be dispersal of seeds away from the parent plants characterised by the mean dispersal distance and by the distribution of dispersal distances (either negative exponential or logn…

Changes of effective gene dispersal distances by pollen and seeds across successive life stages in a tropical tree

2013

Pollen and seed dispersal are the two key processes in which plant genes move in space, mostly mediated by animal dispersal vectors in tropical forests. Due to the movement patterns of pollinators and seed dispersers and subsequent complex spatial patterns in the mortality of offspring, we have little knowledge of how pollinators and seed dispersers affect effective gene dispersal distances across successive recruitment stages. Using six highly polymorphic microsatellite loci and parentage analyses, we quantified pollen dispersal, seed dispersal, and effective paternal and maternal gene dispersal distances from pollen- and seed-donors to offspring across four recruitment stages within a pop…

Plankton Ecology and Diversity

2010

In this chapter we describe plankton responses induced by fluctuating hydrology and eutrophication process in the semi-arid TDNP wetland. We have followed the planktonic community since 1992, at seasonal and interannual scales, covering as well the spatial heterogeneity of the wetland. The studied planktonic components were bacterioplankton, autotrophic picoplankton, nano and microphytoplankton and zooplankton, including ciliates. Plankton has been studied in terms of species composition (diversity), functional groups, spatial heterogeneity, population dynamics. The present data from this wetland allow us to determine which factors (resources and conditions) are relevant for each group and …