The Cost of U.S. Forest-Based Carbon Sequestration

Examines the economic and climate impacts of storing carbon in forests over long periods of time. Investigates the potential for incorporating land-use changes into climate policy

Student-Athletes at an Historically Black University (HBU): Examining the Relationship Between Student-Engagement on Campus and Career Situation Awareness

The purpose of this exploratory study was to examine the relationship between student-athletes’ engagement experiences on campus and their career situation awareness at an historically Black university (HBU) in the Southeastern United States with NCAA Division I affiliation. Data was obtained from a sample (n = 118) of female (n= 45) and male (n = 73) student-athletes using measures from the revised versions of the Student-Athlete Experiences Inventory (SAEI) and the Student-Athlete Career Situation Inventory (SACSI). One-way ANOVA, Pearson product-moment correlation tests, and t-tests were employed to analyze gender, race, year classification, and sport played effects. Following data analysis, three key findings were identified. First, HBCUs are likely to provide socially enriching environments for minority student-athletes of both genders that promote career confidence; particularly for Black, female student-athletes. Second, in an HBCU context, White student-athletes may not be as academically involved in university life when compared to their minority counterparts. Third, the use of the library for academic purposes and engagement in socially enriching experiences may have diminishing effects on female student-athletes’ sport identities. Implications and future research recommendations are discussed. To better validate and improve the generalizability, future research should conduct similar studies that employ data from multiple HBCUs

Fate of diluted bitumen spilled in the coastal waters of British Columbia, Canada.

Abstract There is public concern about the behaviour of spilled diluted bitumen (dilbit) in marine and estuarine waters. We provide a preliminary assessment of the results of laboratory experiments and models, in the context of environmental conditions in the coastal waters of British Columbia. Most dilbit spilled within this region would likely float at the surface and be transported to shore by winds and currents. Fresh dilbit is too light to sink in coastal waters. Highly weathered dilbit could sink where salinity is less than 14, typically only near river mouths and in the top 1–3 m of fjords after heavy rainfall. Subsurface plumes of weathered dilbit could re-emerge at the surface. Sinking oil-particle aggregates are unlikely to form in coastal waters. However, dilbit could be entrained below the surface by wave mixing during storms and to depths of 150 m by coherent mixing in the Haro Strait tidal convergence zone

Importance of continued activation of thrombin reflected by fibrinopeptide A to the efficacy of thrombolysis

Factors responsible for initial success or failure of coronary thrombolysis and persistent recanalization or early reocclusion have not been thoroughly elucidated. Both adequate initial clot lysis and preclusion of rethrombosis are required. Failure may reflect clot lysis followed immediately or somewhat later by rethrombosis. To determine whether differences in the intensity and persistence of the activation of thrombin are determinants of success or failure of recanalization, plasma fibrinopeptide A, a fibrinogen product liberated by thrombin, was serially assayed in 19 patients treated with intravenous streptokinase. In patients exhibiting recanalization (n = 9), plasma fibrinopeptide A decreased after administration of streptokinase but before administration of heparin. In patients without initially apparent recanalization, fibrinopeptide A increased, suggesting ongoing thrombosis, and subsequently decreased promptly after heparin. In patients with initial recanalization followed by overt reocclusion the pattern was different. Despite recanalization, fibrinopeptide A continued to rise markedly. Elevations persisted despite administration of heparin. Thus, inhibition of activation of thrombin is associated with successful recanalization. Conversely, persistent activation of thrombin may be a predisposing factor to both apparent initial failure of recanalization and nvprt early reocclusion

Modeling the Retention Probability of Black Holes in Globular Clusters: Kicks and Rates

We simulate black hole binary interactions to examine the probability of mergers and black hole growth and gravitational radiation signals using a specific initial distribution of masses for black holes in globular clusters and a simple semi-analytic formalism for dynamical interactions. We include 3-body recoil and the latest results in numerical relativity for gravitational radiation recoil. It is found that while 99% of binaries are ejected from low metallicity, low mass clusters; metal rich massive clusters retain 5% of their binaries. An interesting fraction of the ejected binaries, especially those from high mass, high metallicity systems, merge on timescales short enough to be gravitational radiation sources during their mergers with rates approaching those expected for galactic field black hole binaries. While the merger rates are comparable, the much larger mass of these binaries and their localization will make them appealing targets for advanced LIGO. We single out two possible Milky Way clusters (NGC 6441 and NGC 6388) as having the properties for a good probability of retention