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Teaching practices and cognitive skills

National Teaching Standards by various educational organizations in the United States call for a decrease in the use of traditional teaching practices (such as learning by rote) and an increase in the use of modern teaching practices (such as working in small groups) in schools. Yet a small literature in economics has consistently found that traditional teaching raises test scores, while the effec

Haemophilia : strategies for carrier detection and prenatal diagnosis

In 1977 WHO published in the Bulletin a Memorandum on Methods for the Detection of Haemophilia Carriers. This was produced following a WHO/WFH (World Federation of Haemophilia) Meeting of Investigators in Geneva in November 1976, and has served as a valuable reference article on the genetics of haemophilia. The analyses discussed were based on phenotypic assessment, which, at that time, was the on

Reptile embryos lack the opportunity to thermoregulate by moving within the egg

Historically, egg-bound reptile embryos were thought to passively thermoconform to the nest environment. However, recent observations of thermal taxis by embryos of multiple reptile species have led to the widely discussed hypothesis that embryos behaviorally thermoregulate. Because temperature affects development, such thermoregulation could allow embryos to control their fate far more than histo

Distribution and surface enrichment of radionuclides in lead-bismuth eutectic from spallation targets

With the development of new high-power neutron spallation sources --both for scientific application and as neutron production tool for accelerator-driven systems-- the demand for experimentally obtained nuclear data on the residue nuclei production in the target is constantly increasing. In the present work, we examined two lead-bismuth-eutectic targets, irradiated with high-energy protons, concer

Nonvortical Rashba Spin Structure on a Surface with C1h Symmetry

A totally anisotropic peculiar Rashba-Bychkov (RB) splitting of electronic bands was found on the Tl/Si(110)-(1×1) surface with C1h symmetry by angle- and spin-resolved photoelectron spectroscopy and first-principles theoretical calculation. The constant energy contour of the upper branch of the RB split band has a warped elliptical shape centered at a k point located between Γ and the edge of the