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Yet another Theta-System
(2002)
Weak Hypersubstitutions
(2002)
In this paper, we discuss the viscosity solutions of the weakly coupled systems of fully nonlinear second order degenerate parabolic equations and their Cauchy-Dirichlet problem. We prove the existence, uniqueness and continuity of viscosity solution by combining Perron's method with the technique of coupled solutions. The results here generalize those in [2] and [3].
We report on the effect of vibrational resonance in a spatially extended system of coupled noisy oscillators under the action of two periodic forces, a low-frequency one (signal) and a high-frequency one (carrier). Vibrational resonance manifests itself in the fact that for optimally selected values of high-frequency force amplitude, the response of the system to a low-frequency signal is optimal. This phenomenon is a synthesis of two effects, a noise- induced phase transition leading to bistability, and a conventional vibrational resonance, resulting in the optimization of signal processing. Numerical simulations, which demonstrate this effect for an extended system, can be understood by means of a zero-dimensional "effective" model. The behavior of this "effective" model is also confirmed by an experimental realization of an electronic circuit.
Value education of youth
(2002)
The value priorities of students and teachers were measured at eight different schools at the beginning and the end of the school year 2000/2001. This study once again confirmed the theoretical model of a universal structure of human values (Schwartz, 1992). At both measurement times, similar gender differences, as well as positive correlations between religiosity and school commitment were found. The students from the non-religious schools determined Hedonism as their highest, and Tradition as their lowest value priority. In the religious schools, Benevolence and Self-Direction were the highest values, whereas Power was found to be the lowest value priority. The change of the values Conformity, Hedonism, and Universalism was predicted both through the students′ religiosity and their type of school. The change of the values Power, Tradition, Benevolence, and Achievement, however, was mainly predicted through their religiosity. In three out of four schools the student-teacher similarity correlated positively with the school commitment of the students. Across all schools student-teacher similarity correlated positively with academic achievement.
Two Hybrid cDNA Cloning
(2002)