Biometric Identification Based on Eye Movement Dynamic Features.

The paper presents studies on biometric identification methods based on the eye movement signal. New signal features were investigated for this purpose. They included its representation in the frequency domain and the largest Lyapunov exponent, which characterizes the dynamics of the eye movement signal seen as a nonlinear time series.

Impact of Photoperiod Length and Treatment with Exogenous Melatonin during Pregnancy on Chemical Composition of Sheep's Milk.

The aim of the study was to determine the effect of photoperiod and exogenous melatonin on milk yield and chemical composition of sheep's milk. Sheep ( = 60) were randomly divided into three groups: lambing in February (Group 1- = 20), lambing in June (Group 2- = 20), and lambing in June and treated with subcutaneous melatonin implants (Group 3- = 20). Milk yield was higher for Group 1 and Group 2 than for Group 3 ( < 0.