Rider University

About: Rider University is a education organization based out in Lawrenceville, New Jersey, United States. It is known for research contribution in the topics: Dosimetry & Creativity. The organization has 881 authors who have published 1934 publications receiving 50752 citations.

Ultrastable Zirconium-Based Cationic Metal-Organic Frameworks for Perrhenate Removal from Wastewater.

Abstract: The effective removal of radioactive 99TcO4- anion from nuclear wastewater remains a very difficult unsolved problem. Functional adsorbent materials with high stability, anion-exchange capacity, excellent selectivity, and recyclability are much needed to solve this problem. In this work, we designed two stable cationic metal-organic frameworks (MOFs)-Zr-tcbp-Me and Zr-tcpp-Me-for possible use as adsorbent materials to remove 99TcO4-. Both compounds were synthesized by solvothermal reactions of the tetracarboxylate ligand with zirconium salt, followed by postsynthetic modification (N-methylation). The crystallinity of both zirconium-based MOFs can be well retained under harsh conditions, and they exhibit high adsorption capacity and selectivity toward ReO4- anion, a nonradioactive analogue of 99TcO4-. Zr-tcbp-Me and Zr-tcpp-Me demonstrate the highest framework stability toward acidity among all previously reported cationic MOFs that have been tested for perrhenate removal from wastewater.

Common Tangents to Spheres in R 3

Abstract: We prove that four spheres in ℝ3 have infinitely many real common tangents if and only if they have aligned centers and at least one real common tangent.

Administration and Scoring Errors of Graduate Students Learning the WISC-IV Issues and Controversies

Abstract: A total of 19 graduate students enrolled in a graduate course conducted 6 consecutive administrations of the Wechsler Intelligence Scale for Children, 4th edition (WISC-IV, Canadian version). Test ...

International Evidence on Market Linkages after the 2008 Stock Market Crash

Abstract: The 2008 crash was the most important global stock market crash in history since the Great Depression. In this paper, we study the contemporaneous co-movements of and the time-series lead/lag linkages between global stock markets after the 2008 stock market crash by using the time-varying correlation analysis, principal components analysis (PCA), and Granger-causality (G-C) statistical techniques. We find that correlation between global stock markets has increased and the benefit of global portfolio diversification has decreased since the 2008 stock market crash. The PCA technique can group global stock markets in terms of the similarities in their contemporaneous movements. Global investors can maximize the portfolio diversification benefit by investing in stock markets with high factor loadings in different principal components. Our PCA results indicate that all Asian stock markets, except the Japanese stock market, are lumped together in one principal component and the stock markets in the rest of the world are lumped together in another principal component. Our G-C test results show that the U.S. stock market has substantial influence on the European and Australasian stock markets. U.S. stock returns lead the European and Australasian stock returns (i.e., the past returns of the U.S. stock market can predict the future returns of the European and Australasian stock markets).

Patterns of seed bank and vegetation diversity along a tidal freshwater river

Abstract: PREMISE OF THE STUDY Species richness and diversity may increase with spatial scale related to increased area and heterogeneity of habitat. Yet, in bidirectional hydrologically connected tidal ecosystems, secondary dispersal via hydrochory has the potential to homogenize seed banks, and both life history characteristics and tolerances to environmental conditions influence the composition of plant communities. How species richness, diversity, and composition of seed banks and vegetation change along environmental gradients and at different spatial scales is not well understood. METHODS We explored the relationships of seed bank and vegetation diversity across 135 plots along a tidal freshwater river in the Delaware Estuary, USA. Species richness and diversity were partitioned across three hierarchical spatial scales: individual plots, transects perpendicular to the tidal channel, and river kilometers. Community structure was also examined as it related to distance from the tidal channel and location along the tidal river. KEY RESULTS Species richness was 89 in the seed bank and 54 in the vegetation. Species-area relationships revealed that species richness reached a near maximum asymptote inland (20 m from channel) for the seed bank and at the edge (0 m) for the vegetation. Rare occurrences of species in the seed bank and vegetation were greatest 5 m from the channel edge. As spatial scale increased, seed bank richness increased, associated with the progressive accumulation of species. Seed bank diversity, however, was maximized within small plot areas and along the river. Diversity of the vegetation was maximized locally due to the abundance of a few common species. CONCLUSIONS These findings suggest that suites of common species contributed to high localized vegetation diversity, yet large spatial scales maximized the number and diversity of species in the seed bank and vegetation through rare encounters, as well as the complexity of the landscape.