Texas Christian University

About: Texas Christian University is a education organization based out in Fort Worth, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 3245 authors who have published 8258 publications receiving 282216 citations. The organization is also known as: TCU & Texas Christian University, TCU.

Treatment Process and Relapse to Opioid Use During Methadone Maintenance

Abstract: A general framework for studying drug abuse treatment process factors is presented, and components are then used to predict relapse to opioid use during treatment in methadone maintenance. Major domains of the treatment process research framework include client variables at entry, program characteristics, treatment events, and client outcomes. The analyses rely on the use of proportional hazards models to identify significant outcome predictors in a sample of 590 methadone maintenance clients from 21 clinics in the Research Triangle Institute/Treatment Outcome Prospective Study (RTI/TOPS) data system who remained in treatment at least 3 months. The analyses were performed on the total sample and separately on clients from three groups of clinics classified on the basis of the distribution of client relapse rates and tenure in treatment. Relapse rates were related to dosage level, client monitoring with urinalyses, and methadone take-home privileges in some clinics, and hence, these time-varying treatment events were important factors in treatment outcomes. Even at entry to treatment, some measures were found to be related to how the client later performed during treatment. Finally, it was also found that the particular area of professional speciality of the staff making client diagnosis at intake and preparing treatment plans was associated with client outcomes.

The effect of moderators on the salesperson behavior performance and salesperson outcome performance and sales organization effectiveness relationships

Abstract: Salesperson behavior performance is conceptualized as a predictor of outcome performance and sales organization effectiveness. The research considers the effects of salesperson capabilities, industrial/consumer products, and industry growth moderators on salesperson performance and sales organization effectiveness relationships. Empirical analyses are conducted using data from a sample of 174 field sales managers in Austrian sales organizations. The results of moderator regression analyses indicate that salesperson capabilities, product type, and industry growth are relevant moderators. The roles of the moderators vary across the relationships analyzed. Several management and research implications are examined.

Exploring Anticorrelations and Light Element Variations in Northern Globular Clusters Observed by the APOGEE Survey

Abstract: We investigate the light-element behavior of red giant stars in Northern globular clusters (GCs) observed by the SDSS-III Apache Point Observatory Galactic Evolution Experiment (APOGEE). We derive abundances of nine elements (Fe, C, N, O, Mg, Al, Si, Ca, and Ti) for 428 red giant stars in 10 globular clusters. The intrinsic abundance range relative to measurement errors is examined, and the well-known C-N and Mg-Al anticorrelations are explored using an extreme-deconvolution code for the first time in a consistent way. We find that Mg and Al drive the population membership in most clusters, except in M107 and M71, the two most metal-rich clusters in our study, where the grouping is most sensitive to N. We also find a diversity in the abundance distributions, with some clusters exhibiting clear abundance bimodalities (for example M3 and M53) while others show extended distributions. The spread of Al abundances increases significantly as cluster average metallicity decreases as previously found by other works, which we take as evidence that low metallicity, intermediate mass AGB polluters were more common in the more metal poor clusters. The statistically significant correlation of [Al/Fe] with [Si/Fe] in M15 suggests that $^{28}$Si leakage has occurred in this cluster. We also present C, N and O abundances for stars cooler than 4500 K and examine the behavior of A(C+N+O) in each cluster as a function of temperature and [Al/Fe]. The scatter of A(C+N+O) is close to its estimated uncertainty in all clusters and independent on stellar temperature. A(C+N+O) exhibits small correlations and anticorrelations with [Al/Fe] in M3 and M13, but we cannot be certain about these relations given the size of our abundance uncertainties. Star-to-star variations of $\alpha-$elements (Si, Ca, Ti) abundances are comparable to our estimated errors in all clusters.