The paper is devoted to linear and nonlinear optical properties of disordered clusters and nanocomposites. Linear and nonlinear optical polarizabilities of large disordered clusters, fractal clusters in particular, and susceptibilities of nanocomposites are found and calculated numerically. A spectral theory with dipole interaction is used to obtain quantitative results. Major properties of sys...

understanding the relationship between root yield and other traits in sugar beet may be a crucial step towards successful breeding of this important crop. path analysis provides a useful method in analyzing the genetic and phenotypic coefficients of correlations. this method is able to effectively unveil direct and indirect effects among traits of interest. in this research, root yield, yield c...

Facing tremendous and potentially infinite stream data, it is impossible to record them entirely. Thus synopses are required to be generated timely to capture the underlying model for stream management systems. Traditionally, curve fitting through Multiple Linear Regression (MLR) is a powerful and efficient modeling tool. In order to further accelerate its processing efficiency, we propose Step...

OBJECTIVES We hypothesized that variability in voluntary movement paths of assisted living facility (ALF) residents would be greater in the week preceding a fall compared with residents who did not fall. DESIGN Prospective, observational study using telesurveillance technology. SETTING Two ALFs. PARTICIPANTS The sample consisted of 69 older ALF residents (53 female) aged 76.9 (SD ± 11.9 y...

BACKGROUND Falling asleep at work is receiving increasing attention as a cause of work accidents. AIMS To investigate which variables (related to work, lifestyle, or background) are related to the tendency to fall asleep unintentionally, either during work hours, or during leisure time. METHODS 5589 individuals (76% response rate) responded to a questionnaire. A multiple logistic regression...

Quantile regression (QR) has become a popular method of data analysis, especially when the error term is heteroscedastic, due to its relevance in many scientific studies. The ubiquity of high dimensional data has led to a number of variable selection methods for linear/nonlinear QR models and, recently, for the single index quantile regression (SIQR) model. We propose a new algorithm for simult...

Background: Regular physical activity is ranked as a leading health indicator. Despite the extensive benefits of physical activity, elder people are much less active than desired. Using Theory of Planned Behavior (TPB) and the self-efficacy construct, this study examined the prediction of physical activity intention and behavior in a sample of elderly male resident of a nursing home. Me...

We evaluate the effective number of atoms in experiments where a probe laser beam with a Gaussian transverse profile passes through an atomic medium consisting in a cold atom cloud released from a magnetooptical trap. Considering the case where the initial distribution is a Gaussian function of position and of velocity, we give a quantitative description of the temporal variation of the effecti...

Rye (Secale cereale L.) is one of the most important bread grains in colder parts of Europe and its importance has been rising recently. The chemical composition of rye grain promises health benefits and it contributes to higher intake of dietary fibre. Conversely, rye baking performance is not as good as required. The baking quality is mainly affected by the activity of amylases measured as Ha...