692 research outputs found

    Community-Based Housing: Potential for a New Strategy

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    While the housing problem in the United States has changed since Franklin Delano Roosevelt proclaimed that one-third of the nation is ill-housed, it has by no means disappeared. For most low-income people, and to a lesser extent for moderate income people, housing still presents formidable problems. Academics and housing analysts recognize four major aspects of the housing problem: affordability (ratio of housing costs to income), adequacy (including quality and overcrowding), neighborhood conditions, and availability. Over the past decade, the nature of the country\u27s housing problem has undergone some important transformations. Until ten years ago the phrase housing problem conjured up images of low quality housing and overcrowded conditions that were principally the concern of low-income and minority people. By the late 1970s, however, a new aspect of the housing problem-affordability-had become fixed in the American consciousness. Since that time there has been general agreement among housing analysts that the burden of housing costs relative to income has gotten worse, while overall quality has improved. Although blacks and other minorities have benefited from these improvements, their housing situations remain considerably worse than those of the general population

    Nucleon structure from mixed action calculations using 2+1 flavors of asqtad sea and domain wall valence fermions

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    We present high statistics results for the structure of the nucleon from a mixed-action calculation using 2+1 flavors of asqtad sea and domain wall valence fermions. We perform extrapolations of our data based on different chiral effective field theory schemes and compare our results with available information from phenomenology. We discuss vector and axial form factors of the nucleon, moments of generalized parton distributions, including moments of forward parton distributions, and implications for the decomposition of the nucleon spin.Comment: 68 pages, 47 figures. Main revision points: improved discussion of chiral fits and systematic uncertainties, several minor refinements. Accepted for publication in Phys.Rev.

    Federal homeownership policy and home finance : a study in program operations and impacts on the consumer.

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    Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Urban Studies and Planning.Microfiche copy available in Archives and Rotch.Vita.Bibliography: p. 534-549.Ph.D

    Willingness-to-pay for services provided by the Clinical Services Improvement Project (CSI) in Egypt

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    Willingness-to-pay (WTP) surveys are increasingly used in reproductive health programs to predict the impact of price changes on revenues, utilization, and client profile. The FRONTIERS program worked with the Clinical Services Improvement (CSI) project and the Cairo Demographic Center to carry out a WTP survey in six CSI clinics in Egypt. The survey found that most clients would be willing to pay higher prices for CSI services, and WTP did not vary much by client economic status. However, predictive validity was low when all reasons for client discontinuation were included. WTP surveys have the potential to be useful tools for predicting client response to price increases, but predictions for methods like DMPA (which have high discontinuation for method-related reasons) must be adjusted downward using data on method discontinuation from program statistics or from the literature

    Nucleon Generalized Parton Distributions from Full Lattice QCD

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    We present a comprehensive study of the lowest moments of nucleon generalized parton distributions in N_f=2+1 lattice QCD using domain wall valence quarks and improved staggered sea quarks. Our investigation includes helicity dependent and independent generalized parton distributions for pion masses as low as 350 MeV and volumes as large as (3.5 fm)^3, for a lattice spacing of 0.124 fm. We use perturbative renormalization at one-loop level with an improvement based on the non-perturbative renormalization factor for the axial vector current, and only connected diagrams are included in the isosinglet channel.Comment: 40 pages, 49 figures; Revised chiral extrapolations in sections A-K, main conclusions unchange

    Brane universes tested by supernovae

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    We discuss observational constrains coming from supernovae Ia \cite{Perlmutter99} imposed on the behaviour of the Randall-Sundrum models. In the case of dust matter on the brane, the difference between the best-fit general relativistic model with a Λ\Lambda-term \cite{Perlmutter99} and the best-fit brane models becomes detectable for redshifts z>0.6z > 0.6. It is interesting that brane models predict brighter galaxies for such redshifts which is in agreement with the measurement of the z=1.7z = 1.7 supernova \cite{Riess01} and with the New Data from the High Z Supernovae Search Team \cite{schmit02}. We also demonstrate that the fit to supernovae data can also be obtained, if we admit the "super-negative" dark energy p=−(4/3)ϱp = - (4/3) \varrho on the brane, where the dark energy in a way mimics the influence of the cosmological constant. It also appears that the dark energy enlarges the age of the universe which is demanded in cosmology. Finally, we propose to check for dark radiation and brane tension by the application of the angular diameter of galaxies minimum value test.Comment: 4 pages, 5 figures, REVTEX4, amended versio
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