Results 81 to 90 of about 25,485 (163)

Sharp and Bright Photoluminescence Emission of Single Crystalline Diacetylene Nanoparticles [PDF]

open access: yesarXiv, 2016
Amorphous nanoparticles (NPs) of diacetylene (DA) molecules were prepared by using a reprecipitation method. After crystallization through solvent-vapor annealing process, the highly crystalline DA NPs show different structural and optical characteristics compared with the amorphous DA NPs.
arxiv  

The QBO, the annual cycle, and their interactions: Isolating periodic modes with Koopman analysis [PDF]

open access: yesarXiv
The Quasi-Biennial Oscillation (QBO) is the dominant mode of variability in the equatorial stratosphere. It is characterized by alternating descending easterly and westerly jets over a period of approximately 28 months. It has long been known that the QBO interactions with the annual cycle, e.g., through variation in tropical upwelling, leading to ...
arxiv  

Cone reconstruction in Ebstein's anomaly repair: early and long-term results [PDF]

open access: yes, 2011
FUNDAMENTO: As principais correções da anomalia de Ebstein (AE) baseiam-se na reconstrução monocúspide da valva tricúspide e são limitadas pela frequente necessidade de substituição ou pela alta reincidência de insuficiência valvar.
BAUMGRATZ, José Francisco   +7 more
core   +4 more sources

Chlamydia pneumoniae e Mycoplasma pneumoniae nos nódulos de calcificação da estenose da valva aórtica [PDF]

open access: diamond, 2005
Marília Harumi Higuchi dos Santos   +7 more
openalex   +1 more source

Physics-informed spectral approximation of Koopman operators [PDF]

open access: yesarXiv
Koopman operators and transfer operators represent nonlinear dynamics in state space through its induced action on linear spaces of observables and measures, respectively. This framework enables the use of linear operator theory for supervised and unsupervised learning of nonlinear dynamical systems, and has received considerable interest in recent ...
arxiv  

Cardiopatia congênita em filhote de Tamanduá-bandeira (Myrmecophaga tridactyla) de vida livre [PDF]

open access: yes, 2020
The giant anteater is classified as vulnerable on the IUCN red list. The alteration and fragmentation of this habitat due to agriculture are factors responsible for the population decline. In puppies, the survival rate in captivity is 50%.
Pinto, Nataly Nogueira Ribeiro
core  

Experiência Inicial de Dois Centros Nacionais no Implante de Prótese Aórtica Transcateter

open access: yesArquivos Brasileiros de Cardiologia, 2014
Fundamento: O implante de prótese aórtica transcateter é uma alternativa efetiva para o tratamento cirúrgico para a correção de estenose aórtica grave em pacientes inoperáveis ou de alto risco cirúrgico.
Sebastián Lluberas   +9 more
doaj   +1 more source

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