4,369 research outputs found

    Do Historically Black Institutions of Higher Education Confer Unique Advantages on Black Students? An Initial Analysis

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    [Excerpt] Despite the declining relative importance of HBIs in the production of black bachelor\u27s degrees, in recent years they have become the subject of intense public policy debate for two reasons. First, court cases have been filed in a number of southern states that assert that black students continue to be underrepresented at traditionally white public institutions, that discriminatory admissions criteria are used by these institutions to exclude black students (e.g., basing admissions only on test scores and not also on grades), and that per student funding levels, program availability, and library facilities are substantially poorer at public HBIs than at other public institutions in these states (Johnson 1991). In one 1992 case, United States v. Fordice, the Supreme Court ruled that Mississippi had not done enough to eliminate racial segregation in its state-run higher educational institutions (Chira 1992). Rather than mandating a remedy, however, the Court sent the case back to the lower courts for action. What should the appropriate action be? Should it be to integrate more fully both the historically white and the historically black institutions by breaking down discriminatory admissions practices at the former and establishing some unique programs at the latter? Should the HBIs be eliminated and their campuses either folded into the historically white institutions or abandoned? Or should effort be directed at equalizing per student expenditure levels and facilities between campuses, rather than at worrying about the racial distribution of students at each campus, even if such policies might result in voluntary separate but equal institutions? From an economic efficiency perspective, the appropriate policy responses depend at least partially upon the answers to a number of questions: Do HBIs, per se, provide unique advantages to black students that they could not obtain at other institutions? If they do, is this because of the racial composition of their faculty or the racial composition of their students? If they do, would enrolling more black college students in higher expenditure per pupil integrated institutions actually leave these students in a worse position

    Do Historically Black Institutions of Higher Education Confer Unique Advantages on Black Students: An Initial Analysis

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    Do Historically Black Institutions (HBIs)of Higher Education confer unique advantages on black students? Our paper consists of two separate analyses that begin 10 address this issue. The first uses data from the ?National Longitudinal Study of the High School Class of 1972? to ascertain whether black college students who attended HBIs in the early 1970s had higher graduation rates. improved early career labor market success and higher probabilities of going on 10 graduate or professional schools than their counterparts who attended other institutions. The econometric methods we employ control for the characteristics of the students. characteristics of the institutions, and the process by which black students decided 10 enroll (or were prevented from enrolling) in different types of institutions. We find that attendance at an HBI subswltia1ly enhanced the probability that a black student received a bachelor?s degree within seven years. however it had no apparent affect on the student's early career labor market success and probability of enrolling in post-college schooling. The second uses data from the 1987 to 1991 waves of the National Research Council's ?Survey of Earned Doctorates? to provide evidence on the patterns of black citizen doctorates with respect to their undergraduate institutions, their graduate institutions, and whether they achieved academic positions in major American liberal arts and research/doctorate institutions. Among the major findings is that black doctorates who received their undergraduate degrees at HBIs were much less likely to have received their graduate degree at a major research institution than those black doctorates who attended a major research or selective liberal arts undergraduate institution. Similarly, among the black doctorates who entered academic careers, those with graduate degrees from HBIs were less likely to be employed in major American research or liberal arts institutions than those who received their graduate degrees from major research institutions.

    Design-Time Quantification of Integrity in Cyber-Physical-Systems

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    In a software system it is possible to quantify the amount of information that is leaked or corrupted by analysing the flows of information present in the source code. In a cyber-physical system, information flows are not only present at the digital level, but also at a physical level, and to and fro the two levels. In this work, we provide a methodology to formally analyse a Cyber-Physical System composite model (combining physics and control) using an information flow-theoretic approach. We use this approach to quantify the level of vulnerability of a system with respect to attackers with different capabilities. We illustrate our approach by means of a water distribution case study

    Do Historically Black Colleges and Universities Enhance the College Attendance of African American Youths?

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    Recently, Historically Black Colleges and Universities (HBCUs) have become the center of intense policy debates. Do HBCUs enhance the college attendance of African American youths? Previous research has been inconclusive. Among other improvements, our study adjusts for the relative availability of HBCU enrollment opportunities in each state. We find that African Americans are more likely to choose HBCUs over other colleges if more HBCU openings are available. However, more HBCU openings don\u27t increase overall African American enrollment. As we have shown elsewhere, attendance at an HBCU does enhance African American students\u27 college graduation rates

    Involuntary Particularism: What the Noahide Laws Tell Us about Citizenship and Alienage

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    This article argues that the Jewish picture of the Noahide laws, laws thought to apply to all non-Jews but particularly to those who would reside in a Jewish commonwealth, can shed light on how to balance a strong sense of citizenship with reasonable policies towards Lawful Permanent Residents. The article enunciates models for how to adapt the provisions of one legal system to another, shows that the Noahide system demanded that non-Jews accept fundamental aspects of a Jewish worldview in order to live among them, and then applies those lessons to argue for a reinvigorated view of American citizenship and a reconsideration of the meaning of lawful permanent residence

    Effective field theory approach to Casimir interactions on soft matter surfaces

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    We utilize an effective field theory approach to calculate Casimir interactions between objects bound to thermally fluctuating fluid surfaces or interfaces. This approach circumvents the complicated constraints imposed by such objects on the functional integration measure by reverting to a point particle representation. To capture the finite size effects, we perturb the Hamiltonian by DH that encapsulates the particles' response to external fields. DH is systematically expanded in a series of terms, each of which scales homogeneously in the two power counting parameters: \lambda \equiv R/r, the ratio of the typical object size (R) to the typical distance between them (r), and delta=kB T/k, where k is the modulus characterizing the surface energy. The coefficients of the terms in DH correspond to generalized polarizabilities and thus the formalism applies to rigid as well as deformable objects. Singularities induced by the point particle description can be dealt with using standard renormalization techniques. We first illustrate and verify our approach by re-deriving known pair forces between circular objects bound to films or membranes. To demonstrate its efficiency and versatility, we then derive a number of new results: The triplet interactions present in these systems, a higher order correction to the film interaction, and general scaling laws for the leading order interaction valid for objects of arbitrary shape and internal flexibility.Comment: 4 pages, 1 figur

    A Fourier transform for sheaves on Lagrangian families of real tori

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    We systematically develop a transform of the Fourier-Mukai type for sheaves on symplectic manifolds XX of any dimension fibred in Lagrangian tori. One obtains a bijective correspondence between unitary local systems supported on Lagrangian submanifolds of XX and holomorphic vector bundles with compatible unitary connections supported on complex submanifolds of the relative Jacobian of XX (suitable conditions being verified on both sides).Comment: Latex, 30 pages (in a4wide format), no figures. v2: Minor expository changes, typos corrected. v3: Final version to appear in two parts in J. Geom. Phy

    Renormalization Group Treatment of Nonrenormalizable Interactions

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    The structure of the UV divergencies in higher dimensional nonrenormalizable theories is analysed. Based on renormalization operation and renormalization group theory it is shown that even in this case the leading divergencies (asymptotics) are governed by the one-loop diagrams the number of which, however, is infinite. Explicit expression for the one-loop counter term in an arbitrary D-dimensional quantum field theory without derivatives is suggested. This allows one to sum up the leading asymptotics which are independent of the arbitrariness in subtraction of higher order operators. Diagrammatic calculations in a number of scalar models in higher loops are performed to be in agreement with the above statements. These results do not support the idea of the na\"ive power-law running of couplings in nonrenormalizable theories and fail (with one exception) to reveal any simple closed formula for the leading terms.Comment: LaTex, 11 page
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