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Mostrando ítems 1491-1510 de 1852
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Seasonal precipitation in south-central Chile: Trends in extreme events since 1900
(UNAM. CENTRO CIENCIAS ATMOSFERA, 2021-09)We study a regional precipitation time series built upon seven meteorological records from south-central Chile (SCC; 37 degrees-42 degrees S), which altogether cover the period 1900-2019. As a first objective, we investigated ... -
Seasonality Analysis of Sentinel-1 and ALOS-2/PALSAR-2 Backscattered Power over Salar de Aguas Calientes Sur, Chile
(MDPI Multidisciplinary Digital Publishing Institute, 2020-03)Seasonal changes control the development of salt crust over the Salar de Aguas Calientes Sur located in Andes Highlands, Chile. Precipitations throughout the Altiplanic winter (December to March) and austral winter (June ... -
Secondary Circulating Prostate Cells Predict Biochemical Failure in Prostate Cancer Patients after Radical Prostatectomy and without Evidence of Disease
(CIENCIAS, 2013)Introduction. Although 90% of prostate cancer is considered to be localized, 20%-30% of patients will experience biochemical failure (BF), defined as serum PSA >0.2 ng/mL, after radical prostatectomy (RP). The presence of ... -
Segmento II del Hígado ¿Segmento Lateral Izquierdo o Segmento Posterior Lateral Izquierdo?
(CIENCIAS, 2015)La división del hígado en segmentos se basa en que, a partir del hilio, cada una de las ramas de la vena porta está acompañada por una arteria y un conducto biliar. El conocimiento preciso de las estructuras vasculares ... -
Self-Compatibility Not Associated with Morphological or Genetic Diversity Reduction in Oil-Rewarding Calceolaria Species
(MDPI Multidisciplinary Digital Publishing Institute, 2020-10)One of the most common evolutionary transitions in angiosperms is the reproductive change from outcrossing to selfing, commonly associated with changes in floral biology and genetic diversity. Here, we aim to test whether ... -
Self-contradiction for type-2 fuzzy sets whose membership degrees are normal and convex functions
(ELSEVIER SCIENCE BV, 2018)In order to detect contradictory information or to avoid conflicting outputs in processes of inference, the contradiction has been studied in the framework of fuzzy logic. It was found that a set A is N -self-contradictory ... -
Semi-exact solutions of sextic potential plus a centrifugal term
(SPRINGER, 2020-11)We revisit the one-dimensional quantum system of a sextic potential added with a centrifugal term, V(x)=ax(-2)+bx(2)+cx(4)+dx(6), where the parameters a,b,c and d are arbitrary. We find that its solutions can be expressed ... -
Sensing Electrochemical Signals Using a Nitrogen-Vacancy Center in Diamond
(MDPI, 2021-02)Chemical sensors with high sensitivity that can be used under extreme conditions and can be miniaturized are of high interest in science and industry. The nitrogen-vacancy (NV) center in diamond is an ideal candidate as a ... -
Sensitivity analysis of geometrical parameters to study haemodynamics and thrombus formation in the left atrial appendage
(WILEY, 2018)The left atrial appendage (LAA) is a complex and heterogeneous protruding structure of the left atrium (LA). In atrial fibrillation patients, it is the location where 90% of the thrombi are formed. However, the role of the ... -
Sensitivity of Water Price Elasticity Estimates to Different Data Aggregation Levels
(SPRINGER, 2021-05-13)The empirical literature on residential water demand employs various data aggregation methods, which depend on whether the aggregation is over consumption, sociodemographic variables, or both. In this study, we distinguish ... -
Severe alterations in expression and localisation of alpha 6 beta 4 integrin in salivary gland acini from patients with Sjogren syndrome
(CIENCIAS, 2009)Objectives: In salivary glands from patients with Sjogren syndrome, overexpression of laminins 1 and 5 and disorganisation of the acinar basal lamina have been reported. Laminin 5 mediates association of the basal lamina ... -
Severe spontaneous cases of bisphosphonate-related osteonecrosis of the jaws
(CIENCIAS, 2007)A new kind of osteonecrosis has been reported, first in connection with chemotherapy and later with bisphosphonate therapy. Bisphosphonates are used as adjunctive therapy with patients suffering from cancer. The connection ... -
Sex differences in nonmedical prescription tranquilizer and stimulant use trends among secondary school students in Argentina, Chile, and Uruguay
(ELSEVIER IRELAND LTD, 2019)Background Little is known about recent nonmedical prescription tranquilizer and stimulant use trends in Latin America. We tested whether recent trends among students in three South American countries differed by sex over ... -
Shear transformation zones structure characterization in Cu50Zr50 metallic glasses under tensile test
(Elsevier, 2020-11)The atomic structure of Cu50Zr50 metallic glasses under tensile test was investigated using molecular dynamics simulations. Voronoi polyhedra analysis was employed to calculate the number of neighbors for each atom, obtained ... -
Short timescale dynamics of phytoplankton in Fildes Bay, Antarctica
(CAMBRIDGE UNIV PRESS, 2017)Phytoplankton is responsible for most primary production in Antarctica, but the short timescale dynamics of its size structure and composition are poorly described and understood. The abundance and composition of phytoplankton ... -
Short- and Long-term Survival after Stroke in Hospitalized Patients in Chile: A Nationwide 5-Year Study
(CIENCIAS, 2013)Background: Short- and long-term stroke survival is a key indicator of hospital performance in stroke care. Our aim was to estimate short-and long-term survival rates in discharged patients diagnosed with ischemic stroke ... -
Short-term effects of variable-density thinning on regeneration in hardwood-dominated temperate rainforests
(Chile. Universidad Mayor, 2020-05)Second-growth temperate forests usually have simpler composition and structure than comparable old-growth stands. We evaluated the application of variable density thinning (VDT) as a way to increase old-growth attributes, ...