Search results for "Measure"
showing 10 items of 4687 documents
Wybrane narzędzia i metody ewaluacji jakości informacji na stronach WWW
2016
Celem opracowania jest przedstawienie wybranych metod i narzędzi oceny jakości informacji na stronach WWW oraz identyfikacja ich wspólnych kryteriów ewaluacji. Zaprezentowane w publikacji kryteria oceny jakości informacji w większości przypadków znalazły zastosowanie w badaniu jakości informacji medycznej oraz dotyczącej zdrowia. Na podstawie zaprezentowanych pięciu metod/narzędzi utworzono zestawienie wspólnych kryteriów, dotyczących oceny jakości informacji w serwisach internetowych.
Style partycypacji kulturalnej człowieka dorosłego : walidacja narzędzia pomiarowego
2017
Artykuł przedstawia proces walidacji narzędzia pomiarowego, diagnozującego style partycypacji kulturalnej człowieka dorosłego. Jego celem jest opis uzyskanych wyników w poszczególnych etapach walidacji oraz określenie związku pomiędzy stylami partycypacji kulturalnej a układami kultury prezentowanymi przez socjologów kultury. W związku z czym przedmiotem badań jest styl partycypacji kulturalnej człowieka dorosłego. Badania pilotażowe, jak i właściwe zostały przeprowadzone w województwie opolskim, próba badawcza kolejno liczyła 100, a następnie 400 respondentów. Za podstawę teoretyczno-metodologiczną rozważań przyjęto konstrukt teoretyczny Kazimierza Obuchowskiego, opisujący podmiotowy oraz …
Discretising Keyfitz' entropy for studies of actuarial senescence and comparative demography
2023
1. Keyfitz’ entropy is a widely used metric to quantify the shape of the survivorship curve of populations, from plants, to animals, and microbes. Keyfitz’ entropy values 1 correspond to species with a decreasing mortality rate with age (negative senescence), and a Keyfitz entropy of exactly 1 corresponds to a constant mortality rate with age. Keyfitz’ entropy was originally defined using a continuous-time model, and has since been discretised to facilitate its calculation from discrete-time demographic data. 2. Here, we show that the previously used discretisation of the continuous-time metric does not preserve the relationship with increasing, decreasing, or constant mortality rates. To r…
Efficient design and modeling strategies for follow-up studies with time-varying covariates
2015
Epidemiological studies can often be designed in several ways, some of which may be more optimal than others. Possible designs may differ in the required resources or the ability to provide reliable answers to the questions under study. In addition, once the data are collected, the selected modeling approach may affect how efficiently the data are utilized. The purpose of this dissertation is to investigate efficient designs and analysis meth ods in follow-up studies with longitudinal measurements. A key question is how to select optimally a subcohort for a new longitudinal covariate measurement if we cannot afford to measure the entire cohort. Another key question we consider is how to determine …
Problems and Issues in Translating International Educational Achievement Tests
2013
The article reviews research and findings on problems and issues faced when translating international academic achievement tests. The purpose is to draw attention to the problems, to help to develop the procedures followed when translating the tests, and to provide suggestions for further research. The problems concentrate on the following: the unique and demanding purpose of the translation task, the partly contradictory task specifications and translation instructions, the indecision as to whether to produce one or two target versions, the indecision as to whether to use one or two source versions, inadequate revision and verification, deficient translator competences, and a lack of time.…
Interpreting the decomposition of gender earnings gap
2010
In this paper we discuss a decomposition of the gender monthly earnings differential into three components: the first is due to differences in individual characteristics, the second is due to discrimination and the last to the differential in hours worked. The Oaxaca-Blinder hourly wage decomposition is perfectly integrated into the decomposition of the monthly earnings gap. In order to evaluate the effects of this components on the monthly earnings gap, we calculate counterfactual earnings gaps, estimating what would happen if various aspects relating to the two genders were equal (for example, educational level), and then we compare these with the empirical earnings gap. The aim of the co…
Effect of low dissolved oxygen on the viability of juvenile Margaritifera margaritifera : Hypoxia tolerance ex situ
2022
The decline of endangered freshwater pearl mussel (FPM, Margaritifera margaritifera) has been attributed to juvenile mortality caused by low concentrations of dissolved oxygen in the stream substrate resulting from fine sediments (siltation) that impede water exchange in the interstitial microhabitat of juveniles. If low oxygen concentration causes recruitment failure of FPMs, knowledge on the oxygen tolerance of juvenile FPMs is essential for the conservation of the species, as it will justify conservation efforts improving water exchange in the bottom gravel. However, the tolerance of low oxygen of FPM juveniles has not been directly studied. Juvenile FPMs (9–11 months old) were exposed i…
Digital Correlation Method Based on Micro-geometrical Texture Pattern for Strain Field Measurement
2011
International audience; Image correlation methods are widely used in experimental mechanics to obtain displacement field measurements. Currently, these methods are applied using digital images of the initial and deformed surfaces sprayed with black or white paint. Speckle patterns are then captured and the correlation is performed with a high degree of accuracy to an order of 0.01 pixels. In 3D, however, stereo-correlation leads to a lower degree of accuracy. Correlation techniques are based on the search for a sub-image (or pattern) displacement field. The work presented in this paper introduces a new correlation-based approach for 3D displacement field measurement that uses an additional …
The impact of retro-cue validity on working memory representation: Evidence from electroencephalograms.
2022
Visual working memory (VWM) performance can be improved by retrospectively cueing an item. The validity of retro-cues has an impact on the mechanisms underlying the retro-cue effect, but how non-cued representations are handled under different retro-cue validity conditions is not yet clear. Here, we used electroencephalograms to investigate whether retro-cue validity can affect the fate of non-cued representations in VWM. The participants were required to perform a change-detection task using a retro-cue with 80% or 20% validity. Contralateral delay activity and the lateralized alpha power were used to assess memory storage and selective attention, respectively. The retro-cue could redirect…
Electro-optical characterization of new classes of Silicon Carbide UV photodetectors
2014
In this paper, we present the fabrication process steps and the characterization of 4H-SiC vertical Schottky UV detectors, where interdigitated strips, acting as top metal contacts, have been realized in $\hbox{Ni}_{2}\hbox{Si}$ . These devices exploit the pinch-off surface effect. $I$ – $V$ and $C$ – $V$ characteristics, as functions of temperature, were measured in dark conditions. In addition, we have carried out responsivity measurements, for wavelengths ranging from 200 to 400 nm, at varying package temperature and applied reverse bias. A comparison among devices having different strip pitch sizes has been performed, thus finding out that the 10- $\mu\hbox{m}$ pitch class demonstrates …