Search results for "EB"
showing 10 items of 15658 documents
On Line Validation Exercise (OLIVE): A Web Based Service for the Validation of Medium Resolution Land Products. Application to FAPAR Products
2014
International audience; The OLIVE (On Line Interactive Validation Exercise) platform is dedicated to the validation of global biophysical products such as LAI (Leaf Area Index) and FAPAR (Fraction of Absorbed Photosynthetically Active Radiation). It was developed under the framework of the CEOS (Committee on Earth Observation Satellites) Land Product Validation (LPV) sub-group. OLIVE has three main objectives: (i) to provide a consistent and centralized information on the definition of the biophysical variables, as well as a description of the main available products and their performances (ii) to provide transparency and traceability by an online validation procedure compliant with the CEO…
Utility of Alternative Effect Size Statistics and the Development of a Web-Based Calculator: Shiny-AESC
2018
Alternative displays of effect size statistics can enhance the understandability and impact of validity evidence in a variety of applied settings. Arguably, the proliferation of alternative effect size statistics has been limited due to the lack of user-friendly tools to create them. Common statistical packages do not readily produce these alternative effect sizes and existing tools are outdated and inaccessible. In this paper, I introduce a free-to-use web-based calculator (https://dczhang.shinyapps.io/expectancyApp/) for generating alternative effect size displays from empirical data. This calculator requires no mathematical or programming expertise, and therefore, is ideal for academics …
Índices nacionales de satisfacción del consumidor: Una propuesta de revisión de la literatura
2011
Durante las últimas décadas, gran cantidad de académicos del ámbito del marketing que investigan el comportamiento del consumidor han llegado a la conclusión de que la satisfacción es un buen indicador, si no el mejor, de los futuros beneficios de las empresas. A partir de la década de 1990 se han desarrollado los índices nacionales de satisfacción como herramientas de evaluación macro desde el punto de vista del cliente para complementar las medidas objetivas de rendimiento económico tradicionales. En este trabajo se presenta una revisión teórica de los índices nacionales de satisfacción que más relevancia han tenido en entornos tanto profesionales como académicos, identificando las variab…
Estudi clínic,neuropsicològic i de Ressonància magnètica de l´Esclerosi Múltiple primària progressiva
2015
L´esclerosi múltiple primària progressiva es presenta entre un 10-15 % dels pacients, ve definida per un curs progressiu sense brots clars i amb una presentació típica en forma de paraparèsia espàstica fins en un 80 % dels casos. No disposa de tractament aprovat modificador de la malaltia en l´actualitat si bé s´ha vist en base a estudis d´inflamació en LCR que podria existir un subgrup que tindrien un perfil clínic diferent amb inflamació i es podrien beneficiar de tractament. Es tracta doncs, d’un subtipus d’ EM que suposa un repte per a la pràctica clínica, caracteritzat per la progressió inevitable de la discapacitat. És per això que el nostre estudi es va basar en explorar el patró clí…
Transparency reduces predator detection in mimetic clearwing butterflies
2019
International audience; Predation is an important selective pressure and some prey have evolved conspicuous warning signals that advertise unpalatability (i.e. aposematism) as an antipredator defence. Conspicuous colour patterns have been shown effective as warning signals, by promoting predator learning and memory. Unexpectedly, some butterfly species from the unpalatable tribe Ithomiini possess transparent wings, a feature rare on land but common in water, known to reduce predator detection.We tested if transparency of butterfly wings was associated with decreased detectability by predators, by comparing four butterfly species exhibiting different degrees of transparency, ranging from ful…
Weak warning signals can persist in the absence of gene flow
2019
Aposematic organisms couple conspicuous warning signals with a secondary defense to deter predators from attacking. Novel signals of aposematic prey are expected to be selected against due to positive frequency-dependent selection. How, then, can novel phenotypes persist after they arise, and why do so many aposematic species exhibit intrapopulation signal variability? Using a polytypic poison frog (Dendrobates tinctorius), we explored the forces of selection on variable aposematic signals using 2 phenotypically distinct (white, yellow) populations. Contrary to expectations, local phenotype was not always better protected compared to novel phenotypes in either population; in the white popul…
Vascular Risk Factors in Mild Cognitive Impairment Subtypes
2007
<i>Background and Aim:</i> To investigate the role of vascular risk factors in different subtypes of mild cognitive impairment (MCI) in a multicentric, clinic-based, cross-sectional study. <i>Methods:</i> Two-hundred and seven subjects with MCI were included in the study: 33 with single non-memory MCI (snmMCI), 42 with multiple-domain amnestic MCI (mdMCI-a) and 132 with amnestic MCI (aMCI). Several clinical vascular risk factors and magnetic resonance imaging (MRI) brain lesions were evaluated. <i>Results:</i> snmMCI showed a higher frequency of ischaemic heart disease and of transient ischaemic attack (TIA)/stroke, a higher Hachinski ischaemic score and …
Características de los vecindarios y la distribución espacial de problemas sociales en la ciudad de Valencia
2018
The aim of this doctoral thesis is to explore the influence of neighborhood-level variables on the spatial and spatio-temporal distribution of different social problems in the city of Valencia. In Study 1, we present data on the development and validation of an observational instrument to assess neighborhood disorder. Results supported a three-factor model (physical disorder, social disorder and physical deterioration), and they showed good reliability and validity evidences. In Study 2, we assess the psychometric properties of a neighborhood disorder scale using Google Street View. Results supported a bifactorial solution with a general factor (general neighborhood disorder) and two specif…
Uztvertā skolas klimata un vecāku pārraudzības saistība ar pusaudžu savstarpējo iebiedēšanu kibervidē
2018
Pētījuma mērķis bija noskaidrot, kādas saistības pastāv starp uztverto skolas klimatu, adekvātu vecāku pārraudzību un pusaudžu savstarpējo iebiedēšanu kibervidē, un tika pētīts vai pastāv statistiski nozīmīgas atšķirības starp grupām no 5. līdz 9. klasei un no 10. līdz 12. klasei. Tika noskaidrots kā uztvertā skolas klimata un vecāku pārraudzības dimensijas izskaidro pusaudžu kiberupuru un kiberiebiedētāju pieredzi. Pētījumā kopā piedalījās 309 Latvijas skolu skolēni no 5. līdz 12. klasei. Respondenti tika dalīti divās vecuma grupās: 5. – 9. klase (200 respondenti) un 10. – 12. klase (109 respondenti). Pētījumā izmantotās metodes: Vecāku pārraudzības aptauja (Stattin & Kerr, 2000), Skolas k…
Author Correction: Evaluation of three methods for biomass estimation in small invertebrates, using three large disparate parasite species as model o…
2018
Invertebrate biomass is considered one of the main factors driving processes in ecosystems. It can be measured directly, primarily by weighing individuals, but more often indirect estimators are used. We developed two indirect and non-destructive approaches to estimate biomass of small invertebrates in a simple manner. The first one was based on clay modelling and the second one was based on image analysis implemented with open-source software. Furthermore, we tested the accuracy of the widely used geometric approximation method (third method). We applied these three different methods to three morphologically disparate model species, an acanthocephalan worm, a crustacean and a flatworm. To …