Black Existential Philosophy: Truth in Virtue of Self-Discovery

In the past 20 years, within the discipline of philosophy there has been a burgeoning interest in the fields of Race theory, Africana, and African American philosophy, especially in the scholarship and questions concerning the experience and meaning of black existence; that is, within black existential philosophy. Despite this interest, though, there has yet to be a sustained study of the categories of black existential philosophy nor its concepts--there seems to have been the acceptance of traditional European existential categories and concepts merely applied to the questions of black existence. This work, though, offers a sustained examination of the existential categories--subjectivity (and objectivity), time, and history--as well as the partner concepts--freedom/autonomy, anxiety, despair, dread, and the absurd--to see if they can be applied to black existence, and to examine if the concepts themselves change when applied to black existence. What is more, in examining black existence, this work seeks to examine whether or not different categories of and concepts for existence emerge

Is Context Dependency Imperative to Understanding the Impacts of Invasive Plants?

Introduced exotic species have a tendency to become invasive and impact local biological communities. Invasions often impact community attributes such as cover and species richness, but these factors may also regulate patterns of invasion. In such cases, impacts may be dependent on the invasion context. We used data from the Buell-Small Succession Study, a long-term permanent plot study in the piedmont region of New Jersey, to document context dependency in invasion. To do this, we analyzed the factors that affected the colonization and growth of four invasive species, Alliaria petiolata, Lonicera japonica, Microstegium vimineum and Rosa multiflora, as well as the impacts of these invasions on the community. In Lonicera japonica and Microstegium vimineum, it was found that more species rich plots were significantly more likely to become invaded, whereas increased species richness inhibited the likelihood of successful invasion by Alliaria petiolata. The establishment of Rosa multiflora was not affected by variation in species richness. Species richness and total vegetative cover did not significantly affect the growth/spread within successfully invaded plots. Life forms (trees, forbs, lianas, or shrubs) and co-occurring dominant species were linked to the spread of some invasive species. Species richness of the community was significantly affected by A. petiolata, L. japonica, and R. multiflora, within temporally explicit analyses (change over time). The temporally static analysis indicated that species richness was significantly impacted by each of the four invaders with some showing marked differences from the temporally explicit analysis. Total vegetative cover was similarly affected by species invasion. In each of these case studies, the context of invasion was necessary in understanding their ultimate impacts. The perceived impacts of invasion may be offset or amplified by the factors which regulate invasion. My data suggest that analyses from single-time studies may provide inaccurate estimates of invasion impacts

Vibration isolation for line of sight performance improvement

Diagrams of the Reaction Wheel Assembly (RWA) are presented along with charts and graphs illustrating jitter error model, induced vibration tests, radial displacement transfer function, and axial displacement power spectra density. The RWA isolator specification requirements are listed

Boundary-Layer Flow of Nanofluids over a Moving Surface in the Presence of Thermal Radiation, Viscous Dissipation and Chemical Reaction

The flow problem presented in the paper is boundary-layer flow of nanofluids over a moving surface in the presence of thermal radiation, viscous dissipation and chemical reaction. The plate is assumed to move in the same or opposite direction to the free stream which depends on the sign of the velocity parameter. The partial differential equations appearing in the governing equations are transformed into a couple of nonlinear ordinary differential equations using similarity transformations. The transformed equations in turn are solved numerically by the shooting method along with the fourth order Runge-Kutta integration technique. Influences of the pertinent parameters in the flow field are exhaustively studied and sequentially explained graphically and in tabular form. For selected values of the parameters involved in the governing equations like Lewis number, the velocity parameter, magnetic parameter, Eckert number Brownian motion parameter, thermophoresis parameter, thermal radiation parameter, Prandtl number, Reynolds number and chemical reaction parameter, numerical results for the velocity field, temperature distribution, concentration, skin friction coefficient, Nusselt number and Sherwood number are obtained. The results are analyzed and compared with previously published works; they are found in excellent agreement

Inverse opal ceria–zirconia: architectural engineering for heterogeneous catalysis

The application of inverse opal structured materials is extended to the ceria–zirconia (Ce_(0.5)Zr_(0.5)O_2) system and the significance of material architecture on heterogeneous catalysis, specifically, chemical oxidation, is examined

Isolation and Culture of \u3ci\u3eEpichloё sp.\u3c/i\u3e for Re-Infection of Endophyte-Free Southeastern Wildrye (\u3ci\u3eElymus glabriflorus\u3c/i\u3e)

Mutualistic relationships between endophytic fungi and grasses have shown to improve the hardiness of the host. This relationship is common in grasses, including native cool-season grasses that are important in both forage and grassland ecosystems. Elymus genus members, such as Canada wildrye (CAWR), commonly host the endophytic fungi, Epichloё, while southeastern wildrye (SEWR) may not. In this study, seed of ten Elymus accessions and seed and leaves from local SEWR were assessed for endophyte infection. Infection status was confirmed via seed squash and leaf peel techniques and assessed using microscopy. Seed of one SEWR and nine CAWR accessions were assessed for endophyte infection by softening seeds in NaOH. Softened seeds were stained and squashed between a microscope slide and coverslip. Infection status was determined by scanning for mycelia within each seed. Leaf peels were excised from SEWR, stained and observed. Infection status was determined by scanning for mycelia in epidermal cells. Following assessment, all SEWR germplasm was E-, while six CAWR accessions were E+. Endophyte-infected seeds were germinated and pseudostems were used to isolate the endophyte by sterilizing the pseudostems and placing them on PDA in a dark germination chamber until endophyte growth. Isolated endophyte was used to infect E- SEWR. Infection status of SEWR was determined using leaf peels and PCR. This research will help determine if forced endophyte infection can be performed in SEWR

Construction of the Key Lake Tailings Facility

Construction of the Tailings Storage Facility for the Key Lake Project a major uranium mine in northern Saskatchewan, Canada, was completed in June, 1983. Principal design features of the tailings facility are an underseal and underdrainage system over the entire area, systematic deposition of the tailings in thin layers using the sub-aerial technique, and continuous removal and recycling of all surface water and underdrainage outflows to the mill for treatment. These features are designed to achieve a consolidated, drained tailings deposit suitable for immediate decommissioning QD completion of milling, and with a minimal potential of long term seepage. The design has used naturally occurring materials as far as possible, with the underseal constructed by modification of the natural till with imported bentonite. Design requirements, specifications and quality control procedures during construction are described, together with initial deposition of the tailings slurry

Session, Segmented Session, and Acute RPE and Affective Responses to Self-selected Treadmill Exercise

Please view abstract in the attached PDF file