Results 21 to 30 of about 3,709,326 (303)

Impact of Tropospheric Mismodelling in GNSS Precise Point Positioning: A Simulation Study Utilizing Ray-Traced Tropospheric Delays from a High-Resolution NWM

open access: yesRemote Sensing, 2021
In GNSS analysis, the tropospheric delay is parameterized by applying mapping functions (MFs), zenith delays, and tropospheric gradients. Thereby, the wet and hydrostatic MF are derived under the assumption of a spherically layered atmosphere.
Florian Zus   +4 more
doaj   +1 more source

The Effect of Person Misfit on Item Parameter Estimation and Classification Accuracy: A Simulation Study

open access: yesEducation Sciences, 2020
Often, important decisions regarding accountability and placement of students in performance categories are made on the basis of test scores generated from tests, therefore, it is important to evaluate the validity of the inferences derived from test ...
Amin Mousavi, Ying Cui
doaj   +1 more source

To Score or Not to Score? A Simulation Study on the Performance of Test Scores, Plausible Values, and SEM, in Regression With Socio-Emotional Skill or Personality Scales as Predictors

open access: yesFrontiers in Psychology, 2021
This article addresses a fundamental question in the study of socio-emotional skills, personality traits, and related constructs: “To score or not to score?” When researchers use test scores or scale scores (i.e., fallible point estimates of a skill or ...
Nivedita Bhaktha, Clemens M. Lechner
doaj   +1 more source

The Viability of Oil Extraction from Trinidad Tar Sands by Radio Frequency Heating: A Simulation Approach [PDF]

open access: yesJournal of Petroleum Science and Technology, 2018
Trinidad has tar sand resources of about 2 billion barrels of oil on land in the Parrylands/Guapo and Brighton areas. With an oil price of over USD 25 per barrel, the commercial extraction of oil from Trinidad tar sands is viable, but it requires a ...
Tamitha Ramcharan   +2 more
doaj   +1 more source

Crash energy absorption improvement of lightweight structure by using truss core panel

open access: yesNihon Kikai Gakkai ronbunshu, 2014
In this paper, the new type lightweight structure by using truss core panel is proposed. By using general dynamic analysis software LS-DYNA and response surface optimization method to determine the optimal structure of proposed lightweight structure, the
Yang YANG   +3 more
doaj   +1 more source

Theoretical loss and gambling intensity: a simulation study [PDF]

open access: yes, 2012
Many recent studies of internet gambling—particularly those that have analysed behavioural tracking data—have used variables such as ‘bet size’ and ‘number of games played’ as proxy measures for ‘gambling intensity.’ In this paper, it is argued that the ...
Auer, M, Griffiths, MD, Schneeberger, A
core   +1 more source

Preservation of Genetic Variation in a Breeding Population for Long-Term Genetic Gain

open access: yesG3: Genes, Genomes, Genetics, 2020
Genomic selection has been successfully implemented in plant and animal breeding. The transition of parental selection based on phenotypic characteristics to genomic selection (GS) has reduced breeding time and cost while accelerating the rate of genetic
David Vanavermaete   +3 more
doaj   +1 more source

Wavelet Estimators in Nonparametric Regression: A Comparative Simulation Study [PDF]

open access: yes, 2001
Wavelet analysis has been found to be a powerful tool for the nonparametric estimation of spatially-variable objects. We discuss in detail wavelet methods in nonparametric regression, where the data are modelled as observations of a signal contaminated ...
Antoniadis, Anestis   +2 more
core   +7 more sources

Time-Efficient Simulation of Free-Space Optical Communication Systems Under Atmospheric Turbulence, Pointing Error, and Angle-of-Arrival Fluctuations

open access: yesIEEE Photonics Journal, 2023
Computer simulation is a powerful and convenient tool for the design and performance evaluation of free-space optical (FSO) communication systems. In this article, we present two simulation frameworks that incorporate not only the effects of atmospheric ...
Mat T. Nguyen, Vuong Mai, Hoon Kim
doaj   +1 more source

Violation of the Sphericity Assumption and Its Effect on Type-I Error Rates in Repeated Measures ANOVA and Multi-Level Linear Models (MLM)

open access: yesFrontiers in Psychology, 2017
We investigated the effects of violations of the sphericity assumption on Type I error rates for different methodical approaches of repeated measures analysis using a simulation approach.
Nicolas Haverkamp, André Beauducel
doaj   +1 more source

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