Results 51 to 60 of about 127,697 (199)

Will a large complex model ecosystem be viable? The essential role of positive interactions

Ecology, Volume 106, Issue 3, March 2025.
Abstract Ecologists have documented many characteristics of natural systems that foster ecosystem persistence, and it might be deduced that such strategies are essential for counteracting the negative effect of complexity on local stability that was suggested by R.M. May in his influential work of the 1970s.
Rudolf P. Rohr, Louis‐Félix Bersier, Roger Arditi   +2 more
wiley   +1 more source

Correct-by-design Control Synthesis for Multilevel Converters using State Space Decomposition [PDF]

EPTCS 156, 2014, pp. 5-16, 2014
High-power converters based on elementary switching cells are more and more used in the industry of power electronics owing to various advantages such as lower voltage stress and reduced power loss. However, the complexity of controlling such converters is a major challenge that the power manufacturing industry has to face with.
arxiv   +1 more source

Singular holomorphic foliations with attractive leaves [PDF]

Rendiconti di Matematica e delle Sue Applicazioni, 1997
The article starts with a survey on coherent singular holomorphic foliations on connected complex manifolds. These foliations are studied using techniques of dynamical systems, notions like limit sets, basins of attraction, attractors being defined ...
Harald Holmann, Burchard Kaup, Hans-Jörg Reiffen   +2 more
doaj  

Modération statistique et modération sociale des résultats scolaires : approches opposées ou complémentaires ?

Mesure et Évaluation en Éducation, 2017
La modération des résultats d’évaluation est une pratique devenue courante dans de nombreux systèmes éducatifs. Ses buts sont de renforcer l’équité des résultats entre les élèves et/ou leur comparabilité lorsque l’évaluation sert à certifier ou à ...
Dany Laveault, Gonzague Yerly
doaj   +1 more source

Of Slaveholders and Renegades: Semantic Uncertainties in Volodymyr Antonovych’s Conversion to Ukrainianness

Sprawy Narodowościowe. Seria nowa, 2017
Of Slaveholders and Renegades: Semantic Uncertainties in Volodymyr Antonovych’s Conversion to Ukrainianness In an article published in the St. Petersburg-based Ukrainian language journal Osnova (Foundation) in 1862, Włodzimierz Antonowicz, formally the
Jens Herlth
doaj   +1 more source

Nature and significance of Late Pleistocene to Holocene thick evaporite deposits of the Danakil Depression, Afar, Ethiopia

Sedimentology, Volume 72, Issue 2, Page 475-506, February 2025.
Abstract Large evaporite deposits, reaching several hundreds of metres of thickness, occur in many basins of our planet but remain poorly understood due to the absence of modern analogues. The origin of ancient evaporites and their highly variable sedimentation rates are often debated and ambiguous.
Valentin Rime, Haileyesus Negga, Robin Fentimen, Andres Rüggeberg, Afifé El Korh, Claudius Pirkenseer, Jean‐Charles Schaegis, Irka Hajdas, Thierry Adatte, Balemwal Atnafu, Tesfaye Kidane, Anneleen Foubert   +11 more
wiley   +1 more source

Beauty and Distance in the Stable Marriage Problem [PDF]

, 2000
The stable marriage problem has been introduced in order to describe a complex system where individuals attempt to optimise their own satisfaction, subject to mutually conflicting constraints. Due to the potential large applicability of such model to describe all the situation where different objects has to be matched pairwise, the statistical ...
arxiv   +1 more source

Coffee and tea consumption and the risk of head and neck cancer: An updated pooled analysis in the International Head and Neck Cancer Epidemiology Consortium

Cancer, Volume 131, Issue 2, 15 January 2025.
Abstract Introduction The relations between coffee and tea consumption and head and neck cancer (HNC) incidence are unclear. With increasing global HNC burden, this study aims to examine the association between coffee, tea, and HNC. Methods A pooled analysis of 9548 HNC cases and 15,783 controls from 14 individual‐level case‐control studies was ...
Timothy Nguyen, Alzina Koric, Chun‐Pin Esther Chang, Christine Barul, Loredana Radoi, Diego Serraino, Mark P. Purdue, Karl T. Kelsey, Michael D. McClean, Eva Negri, Valeria Edefonti, Kirsten Moysich, Zuo‐Feng Zhang, Hal Morgenstern, Fabio Levi, Thomas L. Vaughan, Carlo La Vecchia, Werner Garavello, Richard B. Hayes, Simone Benhamou, Stimson P. Schantz, Guo‐Pei Yu, Hermann Brenner, Shu‐Chun Chuang, Paolo Boffetta, Mia Hashibe, Yuan‐Chin Amy Lee   +26 more
wiley   +1 more source

Discretized Diffusion Processes [PDF]

, 2000
We study the properties of the ``Rigid Laplacian'' operator, that is we consider solutions of the Laplacian equation in the presence of fixed truncation errors. The dynamics of convergence to the correct analytical solution displays the presence of a metastable set of numerical solutions, whose presence can be related to granularity.
arxiv   +1 more source

Involvement of two uptake mechanisms of gold and iron oxide nanoparticles in a co-exposure scenario using mouse macrophages

Beilstein Journal of Nanotechnology, 2017
Little is known about the simultaneous uptake of different engineered nanoparticle types, as it can be expected in our daily life. In order to test such co-exposure effects, murine macrophages (J774A.1 cell line) were incubated with gold (AuNPs) and iron
Dimitri Vanhecke, Dagmar A. Kuhn, Dorleta Jimenez de Aberasturi, Sandor Balog, Ana Milosevic, Dominic Urban, Diana Peckys, Niels de Jonge, Wolfgang J. Parak, Alke Petri-Fink, Barbara Rothen-Rutishauser   +10 more
doaj   +1 more source