Results 51 to 60 of about 39,922 (204)

Revision of Manettia (Rubiaceae) in Paraguay

open access: yesNordic Journal of Botany, Volume 2026, Issue 2, February 2026.
Manettia Mutis is a Neotropical genus comprising over 100 species, many of which are only known from their original descriptions or, at most, from revisions dating back over 100 years. Recent review studies have remained unpublished for several years. Conventional taxonomic methods are followed.
Silvana Yasmin Gauto   +2 more
wiley   +1 more source

Uma tipografia de base elíptica e outros cruzamentos do design com a geometria das curvas cónicas [PDF]

open access: yes, 2013
Através de alguns exemplos práticos, pretende-se defender que o conhecimento geométrico e, em particular, o conhecimento das curvas cónicas e suas aplicações, pode potenciar o trabalho projetual dos designers, diminuir os custos de hardware e software no
Costa, Joaquim M. de C. Bonifácio da   +2 more
core   +3 more sources

UM MODELO MATEMÁTICO PARA CALIBRAÇÃO DE CÂMARAS BASEADO EM LINHAS RETAS

open access: yesRevista Brasileira de Cartografia, 2009
Com o objetivo de possibilitar uma simplificação no processo de automação da calibração de câmaras, foi desenvolvido um modelo matemático para o uso de retas na calibração de câmaras, baseado no modelo dos planos equivalentes.
Sandra Stephan de Souza Telles   +1 more
doaj  

Large amplitude oscillations for a class of symmetric polynomial differential systems in R³

open access: yesAnais da Academia Brasileira de Ciências, 2007
In this paper we study a class of symmetric polynomial differential systems in R³, which has a set of parallel invariant straight lines, forming degenerate heteroclinic cycles, which have their two singular endpoints at infinity.
Jaume Llibre, Marcelo Messias
doaj   +1 more source

As bolboretas e o seu papel na educación ambiental: xardíns de bolboretas [PDF]

open access: yes, 2008
[Resumo] As bolboretas diúrnas son un excelente grupo de bioindicadores que nos permite comprobar que se están a producir cambios nos ciclos biolóxicos das especies.
Carceller, Fernando
core   +1 more source

Beyond Pathology: α‐Synuclein Homeostasis and Three Principles to Guide Research

open access: yes
Movement Disorders Clinical Practice, EarlyView.
Alberto J. Espay, Andrew J. Lees
wiley   +1 more source

Using lessons from criminal justice research to improve conservation law enforcement research and practice

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John   +3 more
wiley   +1 more source

Um método para registro de dados laser scanner terrestre usando linhas retas e planos

open access: yesRevista Brasileira de Cartografia, 2018
Neste trabalho é apresentado um método para registro de pares de nuvens de pontos 3D derivados do sistema LASER scanner terrestre usando linhas retas e planos.
Giovana Angélica Ros Miola   +2 more
doaj  

Survival, rarity, and extinction in tropical stony corals

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Many reef‐building tropical corals are becoming rare. We considered the meaning of rarity in corals and highlighted taxa that have reached low abundances in the last few decades. The difficulties of quantifying rarity in the marine environment arise from the sheer scale and 3‐dimensional nature of the biome and the inherent challenges therein ...
Bryan Wilson, Peter J. Edmunds
wiley   +1 more source

ALTITUDE E TEMPERATURA: ESTUDO DO GRADIENTE TÉRMICO NO RIO GRANDE DO SUL

open access: yesRevista Brasileira de Climatologia, 2015
A relação da altitude com a temperatura é especialmente importante para as regiões tropicais e subtropicais, onde uma diferença de algumas centenas de metros de altitude pode provocar mudanças sensíveis no ambiente, da biota e consequente sucesso na ...
Elenice Fritzsons   +2 more
doaj   +1 more source

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