Correlation and regression are different, but not mutually exclusive, techniques. Roughly, regression is used for prediction (which does not extrapolate beyond the data used in the analysis) whereas correlation is used to determine the degree of association. There situations in which the x variable is not fixed or readily chosen by the experimenter, but instead is a random covariate to the y va...

In this study, novel near-infrared and attenuated total reflectance mid-infrared spectroscopic methods coupled with multivariate data analysis were established enabling the determination of thymol, rosmarinic acid, and the antioxidant capacity of Thymi herba. A new high-performance liquid chromatography method and UV-Vis spectroscopy were applied as reference methods. Partial least squares regr...

This paper proposes an optical method which allows determination of the organic compound concentration in water by measurement of the UV (ultraviolet) absorption at a wavelength of 250 nm~300 nm. The UV absorbance was analyzed by means of a multiple linear regression model for estimation of the total organic carbon contents in water, which showed a close correlation with the UV absorbance, demo...

Determination of the volumes of acute cerebral infarct in the magnetic resonance imaging harbors prognostic values. However, semiautomatic method of segmentation is time-consuming and with high interrater variability. Using diffusion weighted imaging and apparent diffusion coefficient map from patients with acute infarction in 10 days, we aimed to develop a fully automatic algorithm to measure ...

The type of research used in this is descriptive quantitative. population the study were all employees Tanjung Medan Public Health Center, totaling 43 employees. was completed by using total sampling method. Total a test procedure which number samples equivalent to population. sample people, so entire as study. value Adjusted R square obtained 0.628, therefore coefficient multiple determination...

The main task of soil stabilization is to change their physical characteristics in order strengthen them. Among the stabilized soil, there are no requirements for its filtration. Meanwhile, filtration coefficient an important parameter characterizing permeability soils relation water at full saturation, numerically equal rate a unit pressure gradient. article presents results test determine usi...

The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N, O, Si and Si on a He target, in order to examine the present status of the agreement between theory and experiment.