Results 31 to 40 of about 2,994 (112)

Rotura de maquinaria: Una explicación a partir de la Teoría del Caos

Industrial Data, 2009
Se expone una tentativa para explicar el proceso de las fallas en maquinarias, basada en la teoría del caos. Las máquinas realizan tareas repetitivas que podrían ser modeladas matemáticamente como combinaciones de movimientos oscilatorios forzados; en ...
Javier Montenegro Joo
doaj   +1 more source

Contribution of microcosm experiments to conservation science

Conservation Biology, Volume 40, Issue 1, February 2026.
Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern, Peter A. Vesk, Chris C. Clements, Michael A. McCarthy   +3 more
wiley   +1 more source

Estructura y distribución de una pradera de thalassia testudinum en la Bahía Triganá, Golfo de Urabá, Colombia.

Gestión y Ambiente, 2010
En la pradera de T. testudinum de la bahía Triganá, se determinaron la salinidad, la temperatura y la transparencia del agua y las variables estructurales de la pradera como la cobertura, biomasa, largo y ancho de las hojas, en la franja externa (1 a 3 m
John Bairon Ospina Hoyos, Jaime Alberto Palacio Baena, Andrés Felipe Vargas Ochoa   +2 more
doaj  

Synthesis, Antitubercular Activity, and Computational Characterization of Novel Phenylpyrazole‐Isoniazid Derivatives

Advances in Pharmacological and Pharmaceutical Sciences, Volume 2026, Issue 1, 2026.
Six new phenyl‐1H‐pyrazole‐carbaldehyde isonicotinylhydrazone derivatives 1-10 were synthesized and characterized by spectroscopic (FT‐IR, 1H NMR, and 13C NMR) techniques and electrospray ionization–mass spectrometry (ESI–MS). Homonuclear data from 2D‐NMR (1H‐1H NOESY) revealed that 3 and 5 adopt the transE isomeric form.
Fernando Carrasco, Wilfredo Hernández, Juan Z. Dávalos, Jackeline Mosquera, Oscar Chupayo, Nelly Sivipaucar, Jaime Tamayo, Eduardo Carrasco-S, Jorge Coronel, Osvaldo Yañez, William Tiznado, Anjali Chauhan   +11 more
wiley   +1 more source

Mapping illegal trade routes of live cheetahs from the Horn of Africa to the Arabian Peninsula

Conservation Biology, Volume 39, Issue 3, June 2025.
Abstract Less than 7000 cheetahs (Acinonyx jubatus) persist in Africa. Although human–wildlife conflict, habitat degradation, and loss of prey are major threats to cheetah populations, illegal trade in live cubs for pets may have the most significant impact on populations in the Horn of Africa.
Paul H. Evangelista, Nicholas E. Young, Darin K. Schulte, Patricia D. Tricorache, Matthew W. Luizza, Sarah M. Durant, Kelly W. Jones, Nicholas Mitchell, Tomas Maule, Abdullahi H. Ali, Redae T. Tesfai, Peder S. Engelstad   +11 more
wiley   +1 more source

Downscaling global reference points to assess the sustainability of local fisheries

Conservation Biology, Volume 39, Issue 3, June 2025.
Abstract Multispecies coral reef fisheries are typically managed by local communities who often lack research and monitoring capacity, which prevents estimation of well‐defined sustainable reference points to perform locally relevant fishery assessments.
Jessica Zamborain‐Mason, Sean R. Connolly, M. Aaron MacNeil, Michele L. Barnes, Andrew G. Bauman, David A. Feary, Victor Huertas, Fraser A. Januchowski‐Hartley, Jacqueline D. Lau, Michalis Mihalitsis, Joshua E. Cinner   +10 more
wiley   +1 more source

Estructura de las praderas de thalassia testudinum (bank ex konig, 1805) en Bahía de Sapzurro, Golfo de Urabá, Colombia.

Gestión y Ambiente, 2009
Entre febrero y mayo de 2006, se realizaron tres muestreos para establecer la estructura de las praderas de Thalassia testudinum en la Bahía de Sapzurro.
Andrés Felipe Vargas Ochoa, Jaime Alberto Palacio Baena, John Bairon Ospina Hoyos   +2 more
doaj  

Three‐dimensional conservation planning of fish biodiversity metrics to achieve the deep‐sea 30×30 conservation target

Conservation Biology, Volume 39, Issue 2, April 2025.
Abstract Accelerating rate of human impact and environmental change severely affects marine biodiversity and increases the urgency to implement the Convention on Biological Diversity (CBD) 30×30 plan for conserving 30% of sea areas by 2030. However, area‐based conservation targets are complex to identify in a 3‐dimensional (3D) ocean where deep‐sea ...
Laetitia Mathon, Florian Baletaud, Anne Lebourges‐Dhaussy, Gaël Lecellier, Christophe Menkes, Céline Bachelier, Claire Bonneville, Tony Dejean, Mahé Dumas, Sylvie Fiat, Jacques Grelet, Jérémie Habasque, Stéphanie Manel, Laura Mannocci, David Mouillot, Maëlis Peran, Gildas Roudaut, Christine Sidobre, David Varillon, Laurent Vigliola   +19 more
wiley   +1 more source

MICROHABITAT USE AND MULTIVARIATE PATTERN OF MOTILE EPIFAUNAL COMMUNITY IN RELATION TO SEDIMENT GRAIN SIZE IN A TROPICAL SEAGRASS MEADOW

Gestión y Ambiente, 2008
The relationship between habitat physical structure and motile epifauna community associated to a Seagrass bed dominated by Thalassia testudinum was study over the isobaths of 1 and 3 m, in terms of species diversity, organisms density, micro habitat use
GUILLERMO PENAGOS, JAIME PALACIO, NÉSTOR AGUIRRE   +2 more
doaj  

Desarrollo de la competencia de modelación matemática en estudiantes de séptimo básico a partir de un fenómeno astronómico

UCMaule
En los últimos años, diversas investigaciones han evidenciado deficiencias significativas en el desarrollo de la competencia de modelación matemática en contextos escolares. La limitada consolidación de esta competencia matemática ha puesto en evidencia
Milca Obregón Valdebenito
doaj   +1 more source