Zobrazeno 1 - 10 of 70 pro vyhledávání: '"René Lefever"'
1
Gapped vegetation patterns: Crown/root allometry and snaking bifurcation
Autor: Jaime Cisternas, René Lefever, Daniel Escaff, Marcel G. Clerc, Mustapha Tlidi
Publikováno v: Chaos, solitons and fractals, 133
Nonuniform spatial distributions of vegetation in scarce environments consist of either gaps, bands often called tiger bush or patches that can be either self-organized or spatially localized in space. When the level of aridity is increased, the unif
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82179df75e809ef1b1d0e3f135371077
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/309581
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3
A quantitative theory of vegetation patterns based on plant structure and the non-local F–KPP equation
Autor: René Lefever, John Turner
Publikováno v: Comptes Rendus Mécanique. 340:818-828
The theory of vegetation patterns presented rests on two hypotheses: (i) the self-organization hypothesis that attributes their cause to interactions intrinsic to vegetation dynamics; (ii) the complementary self-assembly hypothesis that attributes th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee08c14bb3ae2bc0478e826d0fdd24a9
https://doi.org/10.1016/j.crme.2012.10.030
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4
Self-Replication Of Localized Vegetation Patches In Scarce Environments
Autor: Piere Couteron, René Lefever, Marcel G. Clerc, Ignacio Bordeu, Mustapha Tlidi
Publikováno v: Scientific Reports
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Scientific Reports, Nature Publishing Group, 2016, 6 (1), ⟨10.1038/srep33703⟩
Scientific Reports, 2016, 6 (1), ⟨10.1038/srep33703⟩
Desertification due to climate change and increasing drought periods is a worldwide problem for both ecology and economy. Our ability to understand how vegetation manages to survive and propagate through arid and semiarid ecosystems may be useful in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbe1299b333ba284c663916a88df78ee
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5
Finger Dynamics in Pattern Forming Systems
Autor: René Lefever, Mustapha Tlidi, Marcel G. Clerc, Ignacio Bordeu
Publikováno v: Springer Proceedings in Physics ISBN: 9783319248691
Macroscopic systems subjected to external forcing exhibit complex spatiotemporal behaviors as result of dissipative self-organization. We consider a paradigmatic Swift-Hohenberg equation in both variational and nonvariational forms in two-dimensions.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db658c8dc9d10f55a2c48311b443b11c
https://doi.org/10.1007/978-3-319-24871-4_21
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6
Vegetation spots and stripes: Dissipative structures in arid landscapes
Autor: Mustapha Tlidi, Olivier Lejeune, René Lefever
Publikováno v: International Journal of Quantum Chemistry. 98:261-271
The large-scale vegetation patterns observed in many arid regions are due to the existence of facilitative and competitive interactions that affect the communal development of plants. For the patterns to form, it is necessary that competitive interac
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9571ec9e5a27216185279852e6cb312
https://doi.org/10.1002/qua.10878
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7
Les zébrures et motifs tachetés de la végétation
Autor: René Lefever
Publikováno v: Bulletin de la Classe des sciences. 15:287-304
Lefever René. Les zébrures et motifs tachetés de la végétation. In: Bulletin de la Classe des sciences, tome 15, n°7-12, 2004. pp. 287-304.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::335e3a1a4a8aef90386225644a842f10
https://doi.org/10.3406/barb.2004.28705
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8
From Localized Spots To The Formation Of Invaginated Labyrinthine Structures In A Swift-Hohenberg Model
Autor: Marcel G. Clerc, Ignacio Bordeu, Mustapha Tlidi, René Lefever
Publikováno v: Communications In Nonlinear Science And Numerical Simulation
Artículos CONICYT
CONICYT Chile
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The stability of a circular localized spot with respect to azimuthal perturbations is studied in a prototype variational model, namely, a Swift–Hohenberg type equation. The conditions under which the circular shape of the spot undergoes an elliptic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b188d9cc66a9fe62a2cf3ded790d85f
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9
Short range co-operativity competing with long range inhibition explains vegetation patterns
Autor: Pierre Couteron, Olivier Lejeune, René Lefever
Publikováno v: Acta Oecologica. 20:171-183
We model the non-local dynamics of vegetation communities and interpret the formation of vegetation patterns as a spatial instability of intrinsic origin: the wavelength of the patterns predicted within the framework of this approach is determined by
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f8efc5344794274adcb47f9b97f9171
https://doi.org/10.1016/s1146-609x(99)80030-7
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10
Pattern selection in optical bistability
Autor: Paul Mandel, Mustapha Tlidi, René Lefever
Publikováno v: Journal of optics. B, Quantum and semiclassical optics, 8 (4
Using the weakly nonlinear theory, we analyse the stability and relative stability of transverse patterns appearing in a passive Kerr cavity. We show that the hexagonal H0 structures are stable in the vicinity of the Turing bifurcation point. Numeric
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https://doi.org/10.1088/1355-5111/8/4/014
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