Accuracy of population validity and cross-validity estimation: An empirical comparison of formula-based, traditional empirical, and equal weights procedures
Raju, NS; Bilgic, R; Edwards, JE; Fleer, PF (SAGE Publications, 1999-06-01)
An empirical monte carlo study was performed using predictor and criterion data from 84,808 U.S. Air Force enlistees. 501 samples were drawn for each of seven sample size conditions: 25, 40, 60, 80, 100, 150, and 200. Using an eight-predictor model, 500 estimates for each of 9 validity and 11 cross-validity estimation procedures were generated for each sample size condition. These estimates were then compared to the actual squared population validity and cross-validity in terms of mean bias and mean squared...
Accuracy of Sources and Near-Zone Fields When Using Potential Integral Equations at Low Frequencies
Gur, Ugur Meric; Ergül, Özgür Salih (2017-01-01)
We consider method-of-moments solutions of the recently developed potential integral equations (PIEs) for low-frequency electromagnetic problems involving perfectly conducting objects. The electric current density, electric charge density, and near-zone fields calculated by using PIEs are investigated at low frequencies, in contrast to those obtained via the conventional electric-field integral equation (EFIE). We show that: 1) the charge density can accurately be found by using EFIE despite the very poor a...
Accuracy assessment of MODIS daily snow albedo retrievals with in situ measurements in Karasu basin, Turkey
Tekeli, AE; Sensoy, A; Sorman, A; Akyürek, Sevda Zuhal; Sorman, U (Wiley, 2006-03-15)
Over the ablation period of 2004, daily snow albedo values retrieved from the moderate-resolution imaging spectroradiometer (MODIS) Terra were compared with ground-based albedo measurements. Two data sets are used for this study. The first data set is from two automatic weather stations (AWS) located at fixed points in Karasu basin in eastern Turkey. This provided the temporal assessment of MODIS daily snow albedo values. The second data set, consisting of 19 observation points randomly distributed around o...
Accuracy and efficiency improvements in iterative hybridization of the method of moments MoM and physical optics PO
AKBAS, MUSTAFA; Alatan, Lale; Ergül, Özgür Salih (2016-04-15)
Full-wave electromagnetic solutions of electrically large objects require large amounts of computer storage and CPU power. Therefore, full-wave techniques, such as the method of moments (MoM), are frequently hybridized with approximate methods like physical optics (PO). As a successful example of this approach, an efficient iterative MoM-PO (EI-MoM-PO) method, which effectively combines MoM and PO to reduce the computational time while providing acceptable accuracy, was proposed. In this paper, the multilev...
Accuracy analyses of numeric weather prediction-based stratiform and convective precipitation shortterm forecasts over Turkey
Aydın, Beril; Yücel, İsmail; Yılmaz, Mustafa Tuğrul; Department of Civil Engineering (2023-1)
This study was carried out to determine whether convective and stratiform (large-scale) precipitation datasets obtained from 5 model forecast-based products would be an adequate alternative for regions where station-based observation networks are sparse. Verification of precipitation types (convective or stratified) from numerical weather forecast (NWP) models (ALARO, CFS, ECMWF HRES, GFS, WRF) is done using station-based observations. Statistical assessments between these precipitation types in different t...
Citation Formats
S. K. Erer, E. Tönük, and S. T. Tümer, “ACCURACY REQURIEMENTS IN BSIP ESTIMATIONS FOR ANALYSIS OF NORMAL GAIT,” 2008, vol. 28, Accessed: 00, 2021. [Online]. Available: