The Red Supergiant Content of M31

We investigate the red supergiant (RSG) population of M31, obtaining radial velocities of 255 stars. These data substantiate membership of our photometrically-selected sample, demonstrating that Galactic foreground stars and extragalactic RSGs can be distinguished on the basis of B-V, V-R two-color diagrams. In addition, we use these spectra to measure effective temperatures and assign spectral types, deriving physical properties for 192 RSGs. Comparison with the solar-metallicity Geneva evolutionary tracks indicates astonishingly good agreement. The most luminous RSGs in M31 are likely evolved from 25-30 Mo stars, while the vast majority evolved from stars with initial masses of 20 Mo or less. There is an interesting bifurcation in the distribution of RSGs with effective temperatures that increases with higher luminosities, with one sequence consisting of early K-type supergiants, and with the other consisting of M-type supergiants that become later (cooler) with increasing luminosities. This separation is only partially reflected in the evolutionary tracks, although that might be due to the mis-match in metallicities between the solar Geneva models and the higher-than-solar metallicity of M31. As the luminosities increase the median spectral type also increases; i.e., the higher mass RSGs spend more time at cooler temperatures than do those of lower luminosities, a result which is new to this study. Finally we discuss what would be needed observationally to successfully build a luminosity function that could be used to constrain the mass-loss rates of RSGs as our Geneva colleagues have suggested.Comment: Accepted for publication in the Astronomical Journa

A Cumulative Bibliography of the Mission-Aransas National Estuarine Research Reserve (NERR)

This document is cumulative bibliography for published works related to the Mission-Aransas National Estuarine Research Reserve (NERR). The document includes publications of the Mission-Aransas NERR and supporting publications that reference research completed within the Mission-Aransas NERR. The mission of the Mission-Aransas NERR is to develop and facilitate partnerships that enhance coastal decision making through an integrated program of research, education, and stewardship. The Mission-Aransas NERR is a component of the National Estuarine Research Reserve System (NERRS). The NERRS is a network of coastal sites that operate as a partnership between the federal government and coastal states. The goal of this non-regulatory program is to perform long-term research in relatively natural settings. The program is administered through the National Oceanic and Atmospheric Administration (NOAA). The Mission-Aransas NERR (185,708 acres or 751.5 km) is located in the Mission-Aransas Estuary. The lands within the Reserve are managed by a combination of state, federal and private entities. The Mission-Aransas NERR is managed by the University of Texas at Austin, Marine Science Institute.UT Librarie

The Ecology and Sociology of the Mission-Aransas Estuary : An Estuarine and Watershed Profile

watershed profileThe Mission-Aransas National Estuarine Research Reserve (NERR) is one of 28 national estuarine reserves created to promote the responsible use and management of the nation's estuaries through a program combining scientific research, education, and stewardship. The purpose of this document is to provide researchers and resource managers with an adequate basis of knowledge to further development of scientific studies and applied management investigations. This document describes the different physical ecosystem components, ecological processes, habitats, and watersheds of the Reserve. The Mission-Aransas NERR is a complex of wetland, terrestrial, and marine environments. The land is primarily coastal prairie with unique oak motte habitats. The wetlands include riparian habitat, and freshwater and salt water marshes. Within the water areas, the bays are large, open, and include extensive wind tidal flats, seagrass meadows, mangroves, and oyster reefs. This site profile describes each habitat by their location, type, distribution, abundance, current status and trends, issues of concerns, and future research plans. Research within the Mission-Aransas NERR seeks to improve the understanding of the Texas coastal zone ecosystems structure and function. Current research includes: nutrient loading and transformation, estimates of community metabolism, water quality monitoring, freshwater inflow, climate change and fishery habitat. Harmful algal blooms, zooplankton, coliform bacteria, submerged aquatic vegetation, and marsh grass are monitored through the System- Wide Monitoring Program (SWMP). This document also describes the climate, hydrography and oceanography, geology, water quality, and endangered species within the Mission-AransasUniversity of Texas Marine Science InstituteMarine Scienc

Moderators, mediators and nonspecific predictors of outcome after cognitive rehabilitation of executive functions in a randomised controlled trial

Moderators, mediators and nonspecific predictors of treatment after cognitive rehabilitation of executive functions in a randomised controlled trial Objective: To explore moderators, mediators and nonspecific predictors of executive functioning after cognitive rehabilitation in a randomised controlled trial, comparing Goal Management Training (GMT) with an active psycho-educative control-intervention, in patients with chronic acquired brain injury. Methods: Seventy patients with executive dysfunction were randomly allocated to GMT (n = 33) or control (n = 37). Outcome measures were established by factor-analysis and included cognitive executive complaints, emotional dysregulation and psychological distress. Results: Higher age and IQ emerged as nonspecific predictors. Verbal memory and planning ability at baseline moderated cognitive executive complaints, while planning ability at six-month follow-up mediated all three outcome measures. Inhibitory cognitive control emerged as a unique GMT specific mediator. A general pattern regardless of intervention was identified; higher levels of self-reported cognitive—and executive–symptoms of emotional dysregulation and psychological distress at six-month follow-up mediated less improvement across outcome factors. Conclusions: The majority of treatment effects were nonspecific to intervention, probably underscoring the variables’ general contribution to outcome of cognitive rehabilitation interventions. Interventions targeting specific cognitive domains, such as attention or working memory, need to take into account the patients’ overall cognitive and emotional self-perceived functioning. Future studies should investigate the identified predictors further, and also consider other predictor candidates

The North Carolina Dissent Statutes: The Seeds of Inequities Germinate

This commentary focuses on three of the inequities which result from the present scheme: (1) the discriminatory treatment of a second or successive spouse, (2) the possibility that a surviving spouse may receive a windfall beyond the designated statutory share, and (3) the loophole which readily allows disinheritance of the surviving spouse

Decorating the Body: An Introduction

-

Nuclear reactions: Testing a message-centered extension of enduring predictions about expert and lay person perceptions of and reactions to risk

The purpose of this dissertation was to critically examine differences in risk perceptions among experts and lay people. In particular, this project aimed to address inconsistent definitions of "expert" found in the existing literature and to test the predictions of the psychometric paradigm in the context of communication. To examine the effect of message features and expertise on risk perceptions and evaluations of risk characteristics, this dissertation employed a 2 (emotional appeal: fear, anger) x 2 (message topic: nuclear energy, traffic accidents) x 4 (expertise: general risk assessors, traffic safety experts, nuclear energy experts, lay people) between-participants design. The results replicated some findings of the existing research. First, in the main, experts reported lower risk perceptions than lay people. Second, expressed fear led to increased risk perceptions compared to expressed anger. This study also advanced theory regarding risk perception and risk communication in two critical ways. First, differences were found not only between experts and lay people but also among the various expert groups, and, even in the expert groups, these differences were influenced in meaningful ways by the messages viewed. Second, this study demonstrated the potential for messages to affect not only risk perceptions but also the evaluation of risk characteristics, a possibility not previously tested. Specifically, the findings indicated that emotional appeals and message topic can affect evaluations of risk characteristics for risks both related to the message and unrelated to the message. The messages' effects on evaluations of risk characteristics were, in fact, more pronounced than the effects of the messages on general risk perceptions. The results suggest the factors argued to be predictive of risk perception (dread risk and knowledge risk), presented previously as inherent characteristics of risks rather than as targets for influence, can be altered through strategic communication. Both theoretical and applied implications of these results are discussed, and recommendations for future research are provided