Results 41 to 50 of about 845 (147)

Restauração e Análise de Imagens via Equações Diferenciais Parciais

Trends in Computational and Applied Mathematics, 2002
O uso de equações diferenciais parciais em processamento de imagens tem sido amplamente usado nos últimos anos. A idéia básica é a de modificar uma dada imagem inicial u(x; t) via uma equação diferencial parcial e obter os resultados esperados como a ...
C.A.Z. BARCELOS
doaj   +1 more source

Habitat and spatial trends of U.K. wintering waterbird populations over 50 years

Conservation Biology, EarlyView.
Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay, Philipp H. Boersch‐Supan, James W. Pearce‐Higgins, Graham E. Austin, Niall H. K. Burton, David Noble, Kirsi Peck, Simon R. Wotton, Teresa M. Frost   +8 more
wiley   +1 more source

Procedimento "MIXED" do SAS® para análise de modelos mistos

Scientia Agricola, 1999
O modelo misto consiste numa importante classe de modelos que tem sido tradicionalmente analisada por meio de procedimentos da análise de variância. Nos modelos mistos, três aspectos são fundamentais: estimação e testes de hipóteses dos efeitos fixos ...
Sílvia Helena Venturoli Perri, Antonio Francisco Iemma   +1 more
doaj  

TAXA DE CÂMBIO E AJUSTE EXTERNO: UMA INVESTIGAÇÃO COM MODELOS ARDL PARA AS ECONOMIAS EMERGENTES DO BRICS

Revista de Economia Contemporânea, 2019
RESUMO O objetivo deste trabalho é investigar o papel da taxa de câmbio (nível, desalinhamento e volatilidade) para o ajuste externo dos BRICS (1998 a 2015) usando modelos ARDL.
Indiane Souza de Azevedo Queiroz, Flavio Vilela Vieira   +1 more
doaj   +1 more source

Changes in the transformative potential of action proposals in Finnish Red Lists from 1986 to 2019

Conservation Biology, EarlyView.
Abstract Red lists provide critical knowledge regarding biodiversity decline, especially in Finland, where broad assessments have been made regularly since the 1980s. They deliver information on the threat status of species and ecosystems, propose actions to guide conservation policy, and have the potential to spur transformative change.
Anni Arponen, Anna Salomaa, Henna Fabritius, Aino Juslén, Saija Kuusela   +4 more
wiley   +1 more source

Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal

Conservation Biology, EarlyView.
Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz, Michelle S. Ward, Jonathan R. Rhodes, Ben C. Scheele, Hugh P. Possingham, Diana O. Fisher   +5 more
wiley   +1 more source

Relação entre o poder calorífico superior e os componentes elementares e minerais da biomassa vegetal

Pesquisa Florestal Brasileira, 2011
Os objetivos do trabalho foram avaliar a correlação, ajustar e selecionar modelos estatísticos lineares simples e múltiplos entre os componentes elementares (carbono, hidrogênio e oxigênio) e o teor de cinzas com o poder calorífico superior da biomassa ...
Thiago de Paula Protásio, Lina Bufalino, Gustavo Henrique Denzin Tonoli, Allan Motta Couto, Paulo Fernando Trugilho, Mário Guimarães Júnior   +5 more
doaj  

Translocation effects on regional and local population viability and connectivity

Conservation Biology, EarlyView.
Abstract Translocations and reintroductions aim to improve the viability of isolated populations and promote connectivity for large carnivores. However, there is no established framework for assessing their success. We used the Eurasian lynx (Lynx lynx) in western and central Europe to assess the impact of translocations on the viability of six ...
Eva Sánchez Arribas, Aimara Planillo, Joe Premier, Tobias Kürschner, Elisa Belotti, Christine Breitenmoser‐Würsten, Luděk Bufka, Rok Černe, Thomas Engleder, Urša Fležar, Tomislav Gomerčić, Miha Krofel, Tereza Mináriková, Paolo Molinari, Simona Poláková, Kateřina Poledníková, Hubert Potočnik, Magda Sindičić, Ira Topličanec, Kristina Vogt, Josefa Volfová, Sybille Wölfl, Fridolin Zimmermann, Marco Heurich, Stephanie Kramer‐Schadt, Anja Molinari‐Jobin   +25 more
wiley   +1 more source

Resposta harmónica de uma camada viscoelástica

Geotecnia, 2003
 Este trabalho apresenta o desenvolvimento teórico sobre a resposta harmónica de uma camada viscoelástica em corte simples. Analisam-se vários modelos de amortecimento em sistemas lineares.
Jaime Santos
doaj   +1 more source

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

Conservation Biology, EarlyView.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams, Fernando Machado‐Stredel, Rowan C. Martindale, Corinne E. Myers   +3 more
wiley   +1 more source