Results 71 to 80 of about 579,274 (170)

PROPOSTA EXPERIMENTAL DIDÁTICA PARA O ENSINO DE ANÁLISE DE COMPONENTES PRINCIPAIS

, 2015
Principal component analysis (PCA) is a chemometric method that allows for the extraction of chemical information that would otherwise be impossible to determine.
Leonardo Valderrama, Vassula Belinato Paiva, P. H. Março, Patrícia Valderrama   +3 more
semanticscholar   +1 more source

Changes in the users of the social‐ecological system around a reciprocal human‐dolphin relationship

People and Nature, Volume 7, Issue 5, Page 974-989, May 2025.
Abstract In contrast to many contemporary negative human‐nature relationships, Indigenous Peoples and Local Communities have stewarded nature through cultural practices that include reciprocal contributions for both humans and nature. A rare example is the century‐old artisanal fishery in which net‐casting fishers and wild dolphins benefit by working ...
Mauricio Cantor, Bruna Santos‐Silva, Fábio G. Daura‐Jorge, Alexandre M. S. Machado, Débora Peterson, Daiane X. da‐Rosa, Paulo C. Simões‐Lopes, João V. S. Valle‐Pereira, Sofia Zank, Natalia Hanazaki   +9 more
wiley   +1 more source

Análise de componentes principais aplicada à flotação de minério de ferro.

, 2018
Flotation is a process of concentration, usually, employed in iron ore processing. The present work aimed to evaluate the influence of variables in the flotation process in the bench-scale using the principal components analysis technique.
Felipe de Orquiza Milhomem, M. A. D. Silveira, Tamiris Fonseca de Souza, T. Cota, T. M. Pereira, Otávia Martins Silva Rodrigues   +5 more
semanticscholar   +1 more source

When do citizen scientists record biodiversity? Non‐random temporal patterns of recording effort and associated factors

People and Nature, Volume 7, Issue 4, Page 860-870, April 2025.
Abstract Citizen science data are increasingly used for ecological research, biodiversity conservation and monitoring. However, these data often present significant analytical challenges due to uneven recording efforts by citizen scientists. Biases caused by intra‐annual differences in levels of recording activity can be particularly severe, hindering ...
Inês T. Rosário, Patrícia Tiago, Sergio Chozas, César Capinha   +3 more
wiley   +1 more source

Análise de componentes principais de características químicas e físicas de terra preta de índio nos municípios de Magazão e Laranjal do Jari, AP. [PDF]

, 2019
O objetivo desse trabalho foi realizar uma análise de componentes principais (ACP) em Terra Preta de Índio sob floresta nos municípios de Magazão e Laranjal do Jari ...
ALMEIDA, H., BRAGA, I. G., CORRÊA, R. B., MARTINS, G. C., MELÉM JÚNIOR, N. J., MUNIZ, A. W., TEIXEIRA, W. G.   +6 more
core  

Do public works programmes foster climate resilience? Conceptual framework and review of empirical evidence

International Social Security Review, Volume 78, Issue 2-3, Page 145-171, April-September 2025.
Abstract Public works programmes (PWPs) are pervasively used to tackle poverty and unemployment, and to build infrastructure and skills in low‐ and middle‐income countries. While their impacts on poverty, food security and labour outcomes have been widely documented, there is little research focusing on the role of PWPs in supporting household climate ...
Francesco Burchi, Anastasia Terskaya, Tekalign Gutu Sakketa, Elisabetta Aurino   +3 more
wiley   +1 more source

Análise de componentes principais em populações naturais de babaçu (Orbignya phalerata Mart.). [PDF]

, 2013
O objetivo desse trabalho foi quantificar a variabilidade genética entre populações naturais de babaçu, a partir de caracteres morfoagronômicos, visando dar suporte a trabalhos de seleção, manejo e melhoramento dessa espécie Foram mensurados, no período ...
CARVALHAES, M. A., LIMA, P. S. da C., SANTOS, M. F. dos, SILVA, K. J. D. e, SOUSA, C. C. de   +4 more
core  

VALORAÇÃO AMBIENTAL DE UM RIO URBANO: UMA APLICAÇÃO DO MÉTODO DE VALORAÇÃO CONTINGENTE EM LAGES, SANTA CATARINA

Revista Brasileira de Ciências Ambientais, 2018
O Rio Carahá é um dos principais rios urbanos de Lages, Santa Catarina, cuja qualidade da água está comprometida pela disposição inadequada de esgoto sanitário e lixo doméstico.
Gabriel Nathan Nicola Mombach, Júlia Wahrlich, Ana Paula Coelho Clauberg, Lucas Silveira Beninca, Flavio José Simioni   +4 more
doaj   +1 more source

Condylar fracture location is correlated to exercise history in Thoroughbred racehorses

Equine Veterinary Journal, Volume 57, Issue 1, Page 76-86, January 2025.
Abstract Background Condylar fractures are a major cause of morbidity and mortality in Thoroughbred racehorses. Condylar fractures have a variety of fracture configurations that suggest there may be differences in aetiopathogenesis. Objective To determine if exercise history differs with condylar fracture location in a population of Thoroughbred ...
Thomas C. Bergstrom, Mathieu Spriet, Ryan S. Carpenter, Kevin L. Jacques, Susan M. Stover   +4 more
wiley   +1 more source

Análise de componentes principais de atributos físicos, químicos e mineralógicos de solos do bioma cerrado

, 2004
Behavior differences between soils of the South-American and Velhas geomorphic surfaces of the Cerrado region, all of them under native vegetation cover, were evaluated by physical, chemical, and mineralogical characterizations, and principal component ...
J. Gomes, N. Curi, P. E. F. D. Motta, J. C. Ker, João José Marques, Darrell G. Schulze   +5 more
semanticscholar   +1 more source