41,524 research outputs found
Monitor for physical property changes in solid propellants
Specially designed sensor is attached to or imbedded in propellant. When sensor is driven into vibration, it moves with a phase lag directly proportional to internal friction or loss coefficent. Resonance frequency of the system is related to Young's modulus. Modulus or internal friction can be monitored over long period of time
Measuring the value of better schools
Several researchers have attempted to measure the value of educational quality by examining its impact on wages earned by students later in life. Adopting an alternative approach, the author of this study calculates what people are willing to pay to reside in a community with superior schools. Controlling for neighborhood characteristics and school financial inputs, she finds that a 5 percent increase in the average test scores of an elementary school leads to a 2.1 percent increase in the price of houses in that school's attendance district.Education
Community Clinical Pastoral Training -- A Success for Ecumenism in Shreveport
A review of the seven years\u27 activity of the Shreveport Medical Society\u27s committee of Medicine & Religion which lead to the formation of the Clinical Pastoral Training Program, is presented by the co-chairmen of the committee
Who Goes to College? Differential Enrollment by Race and Family Background
While trends in college enrollment for blacks and whites have been the subject of study for a number of years, little attention has been paid to the variation in college enrollment by socioeconomic status (SES). It is well documented that, controlling for family background, blacks are more likely to enroll in college than whites. This relationship is somewhat deceptive, however. Upon closer examination, we find that blacks are more likely to enroll in college than their white counterparts only among low-SES individuals. Among high SES individuals, this pattern is reversed. We also find that this relationship is strongest in the 1970s and appears to disappear over time; by the 1990s, blacks are no more likely to attend college than whites at any end of the SES distribution. This paper first documents this phenomenon and then attempts to understand what is driving these differences across the distribution of family background characteristics and why the relationship is changing over time. Although they have a significant impact on college enrollment behavior, tuition costs and local labor markets explain very little of racial differences in college entry. We do uncover different responses to tuition and labor markets by individuals from different ends of the SES distribution, an important consideration for policies targeted at improving college enrollment for low-SES individuals.
Recent Developments in Intergenerational Mobility
Economists and social scientists have long been interested in intergenerational mobility, and documenting the persistence between parents and children's outcomes has been an active area of research. However, since Gary Solon's 1999 Chapter in the Handbook of Labor Economics, the literature has taken an interesting turn. In addition to focusing on obtaining precise estimates of correlations and elasticities, the literature has placed increased emphasis on the causal mechanisms that underlie this relationship. This chapter describes the developments in the intergenerational transmission literature since the 1999 Handbook Chapter. While there have been some important contributions in terms of measurement of elasticities and correlations, we will focus primarily on advances in our understanding of the forces driving the relationship and less on the precision of the correlations themselves.income transmission, income mobility, education, intergenerational transmission
Coupled Ocean Atmosphere Processes and European Climate (COAPEC): improved understanding of the coupled climate system
COAPEC (http://coapec.nerc.ac.uk/) is a five-year Directed Science Programme funded by the Natural Environment Research Council (NERC). COAPEC is providing advances in understanding the mechanisms by which the ocean and atmosphere interact, how these processes are represented in state-of-the-art numerical climate models and how they determine the predictability of the climate system over seasonal-decadal timescales. Processes studied include the generation and propagation of salinity and heat anomalies in the North Atlantic, the influence of the thermohaline circulation and the role of storm tracks on European Climate. The influence of remote processes, including ocean-atmosphere coupling in tropical Atlantic warm events and Southern Ocean circulation are also being investigated.
As part of the programme, new coupled models are being developed, including: a coupled hybrid isopycnic coordinate model; fast models for multi-ensemble runs to investigate model parameters space, using both high performance machines and spare home PC resources; a QG model to investigate high resolution ocean processes in coupled systems and validated ice models for coupled modelling. Underpinning research into improving the observational datasets, such as the SOC flux climatology, and into the influence of sea-ice observations in General Circulation Models is also being carried out as part of the programme.
To place these advances into a socially relevant context, COAPEC is also investigating the methods for using, and economic benefits of, climate forecasts at seasonal timescales for the UK health sector and the UK energy industry
Search for Contact Interactions in the Dimuon Final State at ATLAS
The Standard Model has been successful in describing many fundamental aspects
of particle physics. However, there are some remaining puzzles that are not
explained within the context of its present framework. We discuss the
possibility to discover new physics in the ATLAS Detector via a four-fermion
contact interaction, much in the same way Fermi first described Weak
interactions. Using a simple ratio method on dimuon events, we can set a 95%
C.L. lower limit on the effective scale Lambda = 7.5 TeV (8.7 TeV) for the
constructive Left-left Isoscalar Model of quark compositeness with 100 pb^-1
(200 pb^-1) of data at sqrt{s} = 10 TeV.Comment: To be published in the proceedings of DPF-2009, Detroit, MI, July
2009, eConf C09072
Meet the new borrowers
Credit card lenders have been writing off loans at sharply higher rates since 1995, suggesting that riskier borrowers are acquiring credit cards. What makes the new borrowers riskier--even more than their personal characteristics and attitudes toward debt--is the fact that they carry higher debt burdens and work in occupations where income may be more cyclical.Credit cards ; Risk ; Bank loans
Recent Developments in Intergenerational Mobility
Economists and social scientists have long been interested in intergenerational mobility, and documenting the persistence between parents and children's outcomes has been an active area of research. However, since Gary Solon's 1999 Chapter in the Handbook of Labor Economics, the literature has taken an interesting turn. In addition to focusing on obtaining precise estimates of correlations and elasticities, the literature has placed increased emphasis on the causal mechanisms that underlie this relationship. This chapter describes the developments in the intergenerational transmission literature since the 1999 Handbook Chapter. While there have been some important contributions in terms of measurement of elasticities and correlations, we will focus primarily on advances in our understanding of the forces driving the relationship and less on the precision of the correlations themselves.Intergenerational Transmission, Educational Mobility
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