In this study we estimate urban traffi c fl ow using GPS-enabled taxi trajectory data in Qingdao, China, and examine the capability of the betweenness centrality of the street network to predict traffi c fl ow. The results show that betweenness centrality is not a good predictor variable for urban traffi c fl ow, which has, theoretically, been pointed out in existing literature. With a critique...

Introduction: Prediction of mesiodistal (MD) width of unerupted permanent canines and premolars is an essential aspect of mixed dentition analysis. Several methods are used to predict tooth width. The best methods demonstrate high values of correlation and determination coeffi cients. In this study, we aimed to determine the linear regression equation that would predict the sum of the MD widths...

Many formal models suggest that parties or candidates should locate at the electoral mean. Yet, there is no consistent evidence of such convergence across political systems. Schofield’s (2007) Valence Theorem proves that when valence differences across parties are large, there is non-convergence to the mean. Convergence to the mean depends on the value of the convergence depends, c. When c is h...

When there is exact collinearity between regressors, their individual coeffi cients are not identified, but given an informative prior their Bayesian posterior means are well defined. The case of high but not exact collinearity is more complicated but similar results follow. Just as exact collinearity causes non-identification of the parameters, high collinearity can be viewed as weak identific...

The promise of coupling between magnetization and electric polarization and the potential to manipulate one through the other has become in recent years a driving force for many experimental works on multiferroic materials. The ultimate goal of these studies would be a single-phase material exhibiting a strong coupling between inherent ferromagnetic and ferroelectric ordering at room temperatur...

Richards, Lundqvist-Korf and Hossfeld growth functions were fi tted to age-height data of European chestnut (Castanea sativa Mill.) dominant trees on the northern slopes of Belasitsa mountain, Southwest Bulgaria. Th e model prediction performance was evaluated using quantitative as well as qualitative examinations. Goodness of fi t of each model was estimated by the coeffi cient of determinatio...

For 120 specimens and fi gures of Fragilariforma, 10 Legendre coeffi cients were calculated as shape descriptors. For each half valve apically bisected, 50 x,y coordinates were used to calculate Legendre coeffi cients. Principal components analysis (PCA) was used to ordinate the shape descriptors as a total shape gradient of valve forms. The fi rst four principal components explained 90.3 % of ...

Modeling of complex systems is commonly confronted with high dimensional set of independent variables. Similarly, econometric models are usually built using time series data that often exhibit nonstationarity due to the impact of some policies and other economic forces. In both cases, linear regression modeling may yield unstable least squares estimates of the regression coeffi cients. Principa...

Radon (222Rn) is a naturally occurring radioactive gas that originates from the decay of radium (226Ra) in the primordial uranium (238U) decay series. As a noble gas, it easily migrates through inter-granular spaces; then, because of advection, diffusion and convection with other gasses or with water, it moves through fi ssures and faults until it reaches the outdoor atmosphere. Its half-life i...

submerged breakwaters are one of the shore protective structures. any discontinuity in these breakwaters causes changes on current parameters including speed and water surface profile. in this paper, discontinuous submerged breakwaters were modelled to investigate the changes in the wave and flow pattern.to investigate the phenomenon, three models including a shore with constant slope, a shore ...