The use of methylenedioxymethamphetamine (MDMA) or Ecstasy is a phenomenon that has established itself in the widespread Rave culture. Ecstasy use causes physical, social and psychological problems ...in the development of adolescents and it may also influence their concentration and learning abilities. To prevent these problems, educators should be well-informed regarding current drug use trends and also be capable of assisting adolescents. Research regarding the nature of Ecstasy use is lacking nationally. The purpose of this research was therefore to furnish educators with accurate information that will enable them to obtain a reference point from which assistance can be offered to young Ecstasy users and potential Ecstasy users.
Motivation, stress, anxiety and self-concept are affective variables which relate to drama performance. An empirical investigation was conducted with the aim to determine the underlying relationship ...between the different affective variables, to establish the relationship between these variables and achievement in drama and to determine the developmental pattern of the affective factors from Grade 8 to 12. Hundred and one drama learners from Grade 8 to 12 were used in the sample. The results showed that motivation correlates positively with self-concept and self-concept and motivation correlate negatively with anxiety and stress. Stress and anxiety showed a positive correlation which indicates that high stress relates to high anxiety. Significant but low positive correlations were found between motivation, self-concept and drama achievement. No significant relationship could be found between drama achievement and stress or anxiety. Similarly, no significant differences could be identified between the affective factors in the different grades.
The new variant of the energy partitioning scheme introduced in part I of this paper is applied to discuss the relative stabilities of the cubic L1 sub 2 structure and the tetragonal D0 sub 22 ...structure of TiAl sub 3 and ScAl sub 3 and the stabilization of the L1 sub 2 structure of TiAl sub 3 by alloying with divalent transition metal atoms. Furthermore, a striking difference between the covalent bonding energies of TiAl sub 3 and ScAl sub 3 on the one hand and Ni sub 3 Al on the other hand is found.
We show how the atomistic pseudopotential many-body theory of InGaAs/GaAs addresses some important effects, including (i) the fine-structure splittings (originating from interband spin exchange), ...(ii) the optical spectra of charged quantum dots and (iii) the degree of entanglement in a quantum dot molecule.
PDF
