We report on a uniform comparative analysis of the fundamental parameters of early–type galaxies at z∼1 down to MB ≤ −20, both in the field and in the clusters. The changes in the M/LB ratio from z∼1 to today are larger for lower mass galaxies in all environments, and are larger in the field than in the clusters for galaxies with the same mass. By deriving ages from the M/LB ratio, we estimate ...

New information has recently become available on the fundamental plane for various samples of early-type galaxies with redshift up to 1.3, both in clusters and in the field. This information is reviewed and clues are derived on the evolution of spheroids over the last two thirds of the Universe lifetime as a function of galaxy mass and environment, in comparison with the predictions of the hier...

Romantic relationships among emerging adults (individuals aged 18–25 years) are typically homogenously classified both theoretically and empirically as ‘‘exploratory’’ and ‘‘unstable.’’ With a sample of college students (N 1⁄4 340), we examined within-group variation among romantic relationships in emerging adulthood using latent class analyses. Four predictor variables indicated four types of ...

This review provides a discussion of cancer risk assessment methodology pertinent to developing a strategy for extremely low frequency electric and magnetic fields (EMF). Approaches taken for chemical agents or ionizing radiation in six key topic areas are briefly reviewed, and then those areas are examined from the perspective of EMF, identifying issues to be addressed in developing a risk ass...