Louisiana State University

About: Louisiana State University is a education organization based out in Baton Rouge, Louisiana, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 40206 authors who have published 76587 publications receiving 2566076 citations. The organization is also known as: LSU & Louisiana State University and Agricultural and Mechanical College.

Host range of avian influenza virus in free-living birds

Abstract: Isolation of avian influenza virus (AIV) has been reported from 12 orders and 88 species of free-living birds. Most isolations are reported from species in the orders Anseriformes and Charadriiformes and it is recognized that species in Anseriformes represent important reservoirs of AIV. Morbidity and mortality among free-living birds attributable to AIV infection are rare, but differences in prevalence of AIV occur within and between avian species. Seasonal variation has been reported from free-living and sentinel ducks with peak AIV infection occurring in late summer and early fall. Prevalence of AIV is age-related, with highest isolation rates reported from juvenile birds. Differences in susceptibility to AIV infection among species have been demonstrated under experimental conditions. The dynamics and epidemiology of species-related variation in populations of free-living birds require further study.

Educational effectiveness research (EER): a state-of-the-art review

Abstract: Research and scholarship into educational effectiveness research (EER) is comprehensively reviewed from the UK, The Netherlands, the US, Cyprus, Belgium, Sweden, France, Germany, New Zealand, Australia, and other societies, dating from the field’s origins in the 1970s. Issues include its history, methodological and theoretical advances, scientific properties of school effects, processes at school and classroom level behind these effects, the somewhat limited translation of findings into policy and practice across the world, and future directions for research and practice in EER and for all of the discipline more generally. Future research needs are argued to be a further concentration upon teaching/teachers, more longitudinal studies, more work on possible context specificity, exploration of the cross-level transactions between schools and their teachers/classrooms, the adoption of “efficiency” as well as “effectiveness” as outcome measures, and a renewed focus upon the education of the disadvantaged, the original focus of our discipline when it began.

Physics of white dwarf stars

Abstract: White dwarf stars, compact objects with extremely high interior densities, are the most common end product in the evolution of stars. The authors review the history of their discovery, and of the realisation that their structure is determined by the physics of the degenerate electron gas. Spectral types and surface chemical composition show a complicated pattern dominated by diffusion processes and their interaction with accretion, convection and mass loss. While this interaction is not completely understood in all its detail at present, the study may ultimately lead to important constraints on the theory of stellar evolution in general. Variability, caused by nonradial oscillations of the star, is a common phenomenon and is shown to be a powerful probe of the structure of deeper layers that are not directly accessible to observation. Very strong magnetic fields detected in a small fraction of white dwarfs offer a unique opportunity to study the behaviour of atoms under conditions that cannot be simulated in terrestrial laboratories.

Toward construct validation of a transfer climate instrument

Abstract: Despite general acknowledgment of the difficulty in transferring learning, no validated and generally accepted instrument exists to measure factors believed to affect its transfer. Rouiller and Goldstein (1993) developed an eight-factor structure for a transfer climate instrument but could not validate the structure because their sample size was inadequate. This study attempted to validate their hypothesized constructs using factor analysis and found a substantially different factor structure, suggesting a different direction for future transfer climate instrument research. The results suggest that trainees perceive climate according to referents in the organization rather than according to psychological cues, as Rouiller and Goldstein proposed. Consequently, a transfer climate instrument incorporating additional constructs was analyzed. The resulting nine-factor solution suggested additional constructs and indicated that transfer climate was perceived according to organizational referents.