The state of blacks in higher education

This is a study initiated by the National Association for Equal Opportunity in Higher Education (NAFEO) that provides an overview on the state of blacks in higher education from 1986 through 2005. It focuses on bachelor’s, master’s, and doctorate degrees earned by black Americans. It also examines the advancement, or lack thereof, of black faculty members. The study uses data from the Integrated Postsecondary Education Data Series and the Survey of Doctorial Recipients.blacks; higher education;

Evaluation of the resistance of few citrus rootstocks to alkalinity by applying a faste test of secreening

Alkalinity of Moroccan soils is the major abiotic constraint on citrus production area. The best choice of citrus rootstocks adequate and resistant is a better solution to avoid this problem. The aim of this study is to develop a fast test of citrus rootstocks screening towards alkalinity. The alkaline stress was applied on ten citrus rootstocks two month old, using irrigation with a Hoagland and Arnon solution added with 1 g CaCO(3)/L and adjusted at various pH levels 6, 7 and 9. Observations concerned symptoms incidence and severity of iron chlorosis after two months of rearing. Results permitted to classify Poncirus trifoliata and Flying dragon as the most sensitive to alkalinity stresses, whereas, Citrus volkameriana and Citrus macrophylla were resistant. These conclusions are equivalent with those obtained with old citrus rootstocks in field trials

On the generalized Hartley-Hilbert and Fourier-Hilbert transforms

In this paper, we discuss Hartley-Hilbert and Fourier-Hilbert transforms on a certain class of generalized functions. The extended transforms considered in this article are shown to be well-defined, one-to-one, linear and continuous mappings with respect to δ and Δ convergence. Certain theorems are also established

Historically Black Colleges and Universities are Vital and Valuable to the United States

Though Historically Black Colleges and Universities (HBCUs) are little recognized, both in the United States and internationally, rigorous empirical analysis reveals that given their circumstances, they typically perform at a high level. This is the first comprehensive empirical analysis that has examined the performance of HBCUs

Pulling Back the Veil: What Determines HBCU Campus Enrollments

Historically black colleges and universities (HBCUs) are among the least researched sectors of American higher education. This article addresses a portion of this knowledge deficit by focusing on the determinants of the full-time equivalent enrollments of 50 HBCUs between fiscal year FY 2005 and FY 2018 and then comparing them to a broad sample of 182 non-HBCUs. The most noteworthy specific results generated by our analyses are: (1) increased recruitment of white students by HBCUs may not hold the key to HBCU enrollment success; (2) the incomes of the households from which students emanate have a major positive influence on HBCU enrollments; (3) HBCU campuses whose resource allocations pay more attention to the instruction and student services have higher enrollments; (4) intercollegiate athletic expenditures in general and the operation of an Football Championship Subdivision (FBS)-level football program, in particular, are massively important determinants of HBCU enrollments; and (5) the predicted FY full-time equivalent enrollment (FTE) of an HBCU is less than one-half of what would hold true for a comparably situated non-HBCU

Combined effect of frustration and dimerization in ferrimagnetic chains and square lattice

Within the zero-temperature linear spin-wave theory we have investigated the effect of frustration and dimerization of a Heisenberg system with alternating spins $s_{1}$ and $s_{2}$ on one- and two-dimensional lattices. The combined effect most visibly appears in the elementary excitation spectra. In contrast to the ground state energy that decreases with dimerization and increases with frustration, the excitation energies are shown to be suppressed in energy by both dimerization and frustration. The threshold value of frustration that signals a transition from a classical ferrimagnetic state to a spiral state, decreases with dimerization, showing that dimerization further helps in the phase transition. The correlation length and sublattice magnetization decrease with both dimerization and frustration indicating the destruction of the long-range classical ferrimagnetic. The linear spin wave theory shows that in the case of a square lattice, dimerization initially opposes the frustration-led transition to a spiral magnetic state, but then higher magnitudes of lattice deformation facilitate the transition. It also shows that the transition to spiral state is inhibited in a square lattice beyond a certain value of dimerization.Comment: 8 pages, latex, 12 postscript figure