Results 21 to 30 of about 222,816 (291)

Automating Simulation Research for Item Response Theory using R

open access: yesInternational Journal of Assessment Tools in Education, 2018
A simulation study is a useful tool in examininghow validly item response theory (IRT) models can be applied in various settings.Typically, a large number of replications are required to obtain the desired precision.However, many standard software ...
Sunbok Lee   +2 more
doaj   +1 more source

Towards cooperative management of fatigue and vigilance in railway operations [PDF]

open access: yesITM Web of Conferences
Professional drivers face fatigue and decrease of vigilance over the long driving sessions paving their everyday life. This naturally occurring phenomenon is acknowledged and preventive measures, adapted to the vehicles and missions, are deployed around ...
Berdal Quentin   +2 more
doaj   +1 more source

Interactions between microstructure and fatigue crack growth in αβ titanium alloy [PDF]

open access: yesMATEC Web of Conferences, 2020
In a context of optimization of the crack propagation resistance properties in αβ titanium alloys, this work aim to explore interactions between microstructure and deformation at crack tip in lamellar titanium alloy, especially regarding to the ...
Renon Vincent   +4 more
doaj   +1 more source

HIGH TEMPERATURE OXIDATION OF TI-6AL-4V ALLOY FABRICATED BY ADDITIVE MANUFACTURING. INFLUENCE ON MECHANICAL PROPERTIES [PDF]

open access: yesMATEC Web of Conferences, 2020
Titanium alloys, such as Ti-6Al-4V alloy, fabricated by additive manufacturing processes is a winning combination in the aeronautic field. Indeed, the high specific mechanical properties of titanium alloys with the optimized design of parts allowed by ...
CASADEBAIGT Antoine   +2 more
doaj   +1 more source

Help! I Need a Remote Guide in My Mixed Reality Collaborative Environment

open access: yesFrontiers in Robotics and AI, 2019
The help of a remote expert in performing a maintenance task can be useful in many situations, and can save time as well as money. In this context, augmented reality (AR) technologies can improve remote guidance thanks to the direct overlay of 3D ...
Morgan Le Chénéchal   +7 more
doaj   +1 more source

Мониторинг субъективного благополучия в школе: оценка в рамках современной теории тестирования

open access: yesМониторинг общественного мнения: экономические и социальные перемены, 2022
Тема субъективного благополучия находится в фокусе внимания исследователей и практиков, однако наблюдается нехватка инструментов оценивания субъективного благополучия с подтвержденной валидностью и надежностью, которые позволяли бы проводить ...
Татьяна Николаевна Канонир   +2 more
doaj   +1 more source

Comparison between pystan and numpyro in Bayesian item response theory: evaluation of agreement of estimated latent parameters and sampling performance [PDF]

open access: yesPeerJ Computer Science, 2023
Purpose The purpose of this study is to compare two libraries dedicated to the Markov chain Monte Carlo method: pystan and numpyro. In the comparison, we mainly focused on the agreement of estimated latent parameters and the performance of sampling using
Mizuho Nishio   +5 more
doaj   +2 more sources

Marginal Maximum Likelihood Estimation of Item Response Models in R [PDF]

open access: yes, 2007
Item response theory (IRT) models are a class of statistical models used by researchers to describe the response behaviors of individuals to a set of categorically scored items.
Matthew S. Johnson
core   +6 more sources

Fitting Test for Logistic Function in Defining the Ability Level and Ranking in Exams [PDF]

open access: yesFanāvarī-i āmūzish, 2009
In this paper with using the three- parameter logistic function in response to 4  choice items, the range of ability of each participant for each item or each exam is measured by Item response theory (IRT) and is marked and ranked by each participant’s ...
K. Aghigh
doaj   +1 more source

On a shape adaptive image ray transform

open access: yes, 2013
A conventional approach to image analysis is to perform separately feature extraction at a low level (such as edge detection) and follow this with high level feature extraction to determine structure (e.g.
Ah Reum, Oh, Nixon, Mark S.
core   +1 more source

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