Results 21 to 30 of about 2,946 (127)

Demographic buffering in natural populations: A multi‐level perspective

Journal of Animal Ecology, Volume 95, Issue 8, Page 1298-1310, August 2026.
We introduce a multi‐level framework that unites stochastic elasticities with nonlinear selection to test demographic buffering. Applying it across mammals reveals a key insight: ecological robustness to variability often decouples from evolutionary constraint, reshaping how we understand resilience under environmental stochasticity.
Gabriel Silva Santos, Samuel J. L. Gascoigne, André Tavares Corrêa Dias, Maja Kajin, Roberto Salguero‐Gómez   +4 more
wiley   +1 more source

Comparison between simplified and FE models for short-term deflection in continuous RC beams

Revista IBRACON de Estruturas e Materiais
In this work, a comparative study of different simplified methods and nonlinear finite element (FE) models used for calculating short-term deflections (vertical displacements of the longitudinal axis) in continuous reinforced concrete (RC) beams, under ...
E. JUNGES, H.L. LA ROVERE
doaj   +1 more source

A quantitative analysis to detect mass mortality events (wrecks) in Procellariiformes

Journal of Applied Ecology, Volume 63, Issue 7, July 2026.
Our study provides the first systematic assessment of seabird mass mortality events in the South Atlantic and introduces a transferable statistical framework for detecting MMEs in other taxa and regions lacking baseline mortality information. By identifying recurrent temporal anomalies, high‐risk areas and vulnerable species, we could establish ...
Laura Baes, Ana Carolina Ewbank, Henrique Chupil, Carolina Reigada   +3 more
wiley   +1 more source

Comportamento dos conversores comutados sob tensão nula com o indutor ressonante não linear

Eletrônica de Potência, 1996
A substituição do indutor ressonante linear por outro não linear, de maneira que o valor da indutância decresça com o aumento da corrente de carga, foi proposto para superar as dificuldades encontradas nos convemores comutados sob tensão nula Este ...
Ricardo Nederson do Prado
doaj   +1 more source

Is There Life After Death? The Role of Standing Dead Phorophytes in Supporting Tropical Epiphyte Diversity

Biotropica, Volume 58, Issue 4, July 2026.
ABSTRACT Global increases in tree mortality from climate change and land‐use are altering forest structures, impacting canopy‐dwelling plants like vascular epiphytes, which depend on host trees (phorophytes). When a phorophyte dies standing, it becomes a snag, the local substrate conditions change and microclimatic exposure may increase, particularly ...
Camila Nardy Delgado, Samyra Gomes Furtado, Luiz Menini Neto, Flavio Nunes Ramos   +3 more
wiley   +1 more source

Numerical analysis of nonlinear behavior of steel-concrete composite structures

Revista IBRACON de Estruturas e Materiais
This paper presents the development of an effective numerical formulation for the analysis of steel-concrete composite structures considering geometric and materials nonlinear effects.
Í.J.M. LEMES, A.R.D. SILVA, R.A.M. SILVEIRA, P.A.S. ROCHA   +3 more
doaj   +1 more source

Reinicialização De Controladores Repetitivos Em Inversores PWM Sob Distúrbios Não-Periódicos: Análise E Projeto

Eletrônica de Potência, 2010
Embora inversores PWM com controle repetitivo apresentem um excelente desempenho em regime permanente sob cargas não-lineares cíclicas, eles não apresentam uma boa resposta dinâmica sob distúrbios não-periódicos. Então, esse artigo apresenta a análise e
Cassiano Rech, Leandro Michels, José Renes Pinheiro   +2 more
doaj   +1 more source

Fine‐scale patterns of genetic structure in three species of forest birds reveal dynamic Pleistocene history within an Amazonian interfluve

Ibis, Volume 168, Issue 3, Page 972-984, July 2026.
Phylogeographical studies of Amazonian birds have revealed large intraspecific diversity, even within recognized areas of endemism. To understand the origin and organization of Amazonian diversity, including the influence of current and historical landscapes, we need to evaluate fine‐scale patterns of genetic diversity in relation to detailed ...
Affonso Henrique Nascimento de Souza, Camila Duarte Ritter, João Marcos Guimarães Capurucho, Juliana Menger, Camila Cherem Ribas   +4 more
wiley   +1 more source

Fórmula de extrapolação para análise não-linear de estruturas de concreto armado.

Vetor, 2007
Neste trabalho aplica-se o método de Newton-Raphson em análise não-linear de estruturas de concreto armado. Para acelerar a convergência do método de Newton-Raphson modificado, são desenvolvidas três fórmulas de extrapolação de deslocamentos que são ...
José Milton de Araújo
doaj   +4 more sources

Finite Element Model for Nonlinear Analysis of Reinforced Concrete Beams and Plane Frames

Revista IBRACON de Estruturas e Materiais
In this work, a two-dimensional finite element (FE) model for physical and geometric nonlinear analysis of reinforced concrete beams and plane frames, developed by the authors, is presented.
R.S.B. STRAMANDINOLI, H.L. LA ROVERE
doaj   +1 more source