Results 41 to 50 of about 5,188,056 (277)

RR Lyrae variables in M5 as a test of pulsational theory [PDF]

, 1999
We present B and V CCD photometry for variables in the cluster central region, adding new data for 32 variables and giving suitable light curves, mean magnitudes and corrected colors for 17 RR Lyrae. Implementing the data given in this paper with similar
Caputo, F., Castellani, V., Marconi, M., Ripepi, V.   +3 more
core   +3 more sources

Measurement Reliability in Psychology: Method Development, Infatuation with Cronbach’s Alpha Coefficient, and Recommendations for Appropriate Reliability Estimation

Psychological Topics, 2020
The purpose of this review article is to indicate the abundant history of the concept of measurement reliability and steep improvement in reliability estimation since the 1940s, which produced a large number of approaches to its estimation.
Josip Novak
doaj  

The Theory of Conjuntos-T and the PISA Test

Góndola, Enseñanza y Aprendizaje de las Ciencias, 2018
In this article of documented reflection, some elements of a new theory are showed that study how the different agents (teachers, researchers, pedagogues, ...) and institutions that are part of the educational system, configure environments for the ...
Ricardo J. De Armas Costa, David Macías M., Ricardo A. Bernal B.   +2 more
doaj   +1 more source

Cosmological test of the Yilmaz theory of gravity

, 2007
We test the Yilmaz theory of gravitation by working out the corresponding Friedmann-type equations generated by assuming the Friedmann-Robertson-Walker cosmological metrics.
Alley C O, Alley C O, Alley C O, Alley C O Yilmaz H, Bennett C, Bjornson A, Carroll S, Cooperstock F I, Davies P C W, Fackerell E D Wiltshire D L, Hoyle F, Michael Ibison, Milne E A, Misner C W, Misner C W, Mizobuchi Y, Mizobuchi Y, Peacock J A, Peterson I, Schmidt B P, Tolman R C, Tupper B O J, Weinberg S, Wyss W, Yilmaz H, Yilmaz H, Yilmaz H, Yilmaz H, Yilmaz H   +28 more
core   +1 more source

An empirical comparison of Item Response Theory and Classical Test Theory [PDF]

Psihološka Obzorja, 2008
Based on nonlinear models between the measured latent variable and the item response, item response theory (IRT) enables independent estimation of item and person parameters and local estimation of measurement error.
Špela Progar, Gregor Sočan
doaj  

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

The evolutionary time scale of Sakurai's object: A test of convection theory? [PDF]

, 2001
Sakurai's object (V4334 Sgr) is a born again AGB star following a very late thermal pulse. So far no stellar evolution models have been able to explain the extremely fast evolution of this star, which has taken it from the pre-white dwarf stage to its ...
Asplund M., Asplund M., Bessell M. S., Blocker T., Blocker T., Falk Herwig, Herwig F., Herwig F., Herwig F., Kerber F., Kimeswenger S., Langer N., Schonberner D.   +12 more
core   +2 more sources

Statistical refinement of patient-centered case vignettes for digital health research

Frontiers in Digital Health
Digital health research often relies on case vignettes (descriptions of fictitious or real patients) to navigate ethical and practical challenges. Despite their utility, the quality and lack of standardization of these vignettes has often been criticized,
Marvin Kopka, Markus A. Feufel
doaj   +1 more source

ITEM RESPONSE THEORY AS A TOOL FOR THE ESTIMATION OF A LANGUAGE TEST

Системный анализ и прикладная информатика, 2018
Being a part of applied linguistics a language test plays an important role in a modern society. It is used for evaluating person’s language skills not only at educational establishments but also while acquiring citizenship or getting a job.
M. V. Makarych
doaj   +1 more source