We present a simple variational scheme for calculating the binding energies and the lowest dipole optical transition energies of D-impurities in the middle of quantum wells at moderate and high magnetic fields. The objective was to make the model and the method as simple as possible but to be able to explain many of the experimental features observed. The simple form of the electronic wavefunctions used enables physical insight into the properties of the D- system in quantum wells. The scheme, based on the parabolic approximation for the conduction band, gives results compatible with those of more sophisticated approaches. A simple renormalization procedure makes the results compatible also with the experimental results for GaAs quantum wells for which band non-parabolicity proved to be important. The energies for the lowest dipole optical transitions were calculated for a broad range of magnetic fields and well widths.

Rodríguez, C., Ospina, J., & Piedra, J. (2016). Athletic body stereotypes in the academic training of students in the Physical Activity and Sport Sciences. J. Hum. Sport Exerc., 11(1), 74-88. In the past years, despite advances in recent decades in terms of rights and equal opportunities between women and men, the male and female body stereotypes have not disappeared; on the contrary, they have continued to exist at an even greater scale. However, there are no current studies analyzing this phenomenon in terms of the perceptions held by future professionals in the field of physical education and sport in Spain. In this paper, we have tried to examine the stereotypes of gender that exist in the substructures of beliefs of students of physical and sports activity science in regard to the body of women in athletics. The study took place in three Andalusian public universities currently offering studies in the field of athletics (2009-2010, N= 424). Data collection was conducted through a questionnaire completed online. The analysis of data was conducted by descriptive statistics. Results show the existence of a stereotyped conception, both overt and covert, against the stated objective. Gender stereotypes detected on the woman's body on training in track and field are mainly located in physical appearance and performance, manifestations of gender in terms of the woman's body and on different events that took place. Their need to maintain beauty standards, brought under established social control, emanates from these perceptions.