Simulator investigation of arrow-wing low-speed handling qualities

Low speed handling qualities of arrow wings were investigated with a piloted simulator. Existing aerodynamic data were used from NASA SCAT 15F tunnel tests augmented with Lockheed low speed wind tunnel test data. Two arrow wing planforms were chosen for the simulation effort a Mach 2.0 design and a Mach 2.7 design. These designs are in the SCAT 15F Mach 2.7 design family, having the same beta AR and beta cot lambda. Piloted simulation results indicate that both the Mach 2.0 and Mach 2.7 planforms have satisfactory longitudinal flying qualities. However, in the control of bank angle the Mach 2.0 planform demonstrates satisfactory handling qualities while the Mach 2.7 planform is unacceptable. This situation applies for crosswind landings at FAA limits and for lineup in heavy turbulence. The low speed superiority of the Mach 2 planform with its lower sweep and higher aspect ratio is also shown by its ability to approach at least 8 m/s slower than the Mach 2.7 planform without degradation in handling qualities

The Economic Reality of the Beauty Myth

We investigate income, marital status, and hourly pay differentials by body mass (kg/m2) in a sample of 23 to 31 year olds drawn from the 1988 NLSY. Obese women have lower family incomes than women whose weight-for-height is in the 'recommended' range. Results for men are weaker and mixed. We find similar results when we compare same-sex siblings in order to control for family background (e.g., social class) differences. Differences in economic status by body mass for women increase markedly when we use an earlier weight measure or restrict the sample to persons who were single and childless when the early weight was reported. There is some evidence of labor market discrimination against obese women. However, differences in marriage probabilities and in spouse's earnings account for 50 to 95 percent of their lower economic status. There is no evidence that obese African American women suffer an economic penalty relative to other African American women.

Obesity and labor market outcomes

Rising obesity is not only a pressing global public health problem. There is also substantial evidence that obese people, particularly women, are less likely to be employed and, when employed, are likely to earn lower wages. There is some evidence that the lower earnings are a result of discriminatory hiring and sorting into jobs with less customer contact. Understanding whether obesity is associated with adverse labor market outcomes and ascertaining the source of these outcomes are essential for designing effective public policy

Transonic aerodynamic damping and oscillatory stability in yaw and pitch for a model of a variable-sweep supersonic transport airplane

Transonic aerodynamic stability and damping in yaw and pitch for variable sweep supersonic transport mode

Algeria in Perspective: Changing the Understanding of the Modern Algerian State

Much of the existing literature on the modern state of Algeria reinforces rivalry-based understandings of the politico-linguistic infrastructure that overemphasize the presence of a dichotomy (French v. Arabic) in the linguistic make up of the state. Many studies rely on this construction of an Algerian language dichotomy to predict the future of the state, while; in fact, more attention should be paid to the multilingual, multicultural, and multinational reality of the larger demographic. Algeria’s history of language rationalization has laid the foundation for unique institutional reflections of state power dynamics within a multilingual environment. Discussions of Algeria’s historical background, identity construction, revolutionary movements, nationalism, and the future of Algerian governance would benefit from a more comprehensive and interdisciplinary exploration of the language attitudes that exist across demographics. This paper explores works by sociolinguists such as Hafid Gafaïti, Wallace Lambert, and Mohamed Benrabah and political scientists such as Lindsay Benstead, Amaney Jamal, and Megan Reif to develop how sociolinguistic survey methodologies such at the Matched Guise technique might be utilized to form a better understanding of Algeria\u27s political prospects

Shifting Identities: The Power of/in Teaching Autoethnography

This presentation will provide an autoethnographic account of the experience of teaching, assigning and critiquing social work student\u27s autoethnographies. Nodal moments from five years of utilizing this method in the classroom will be explored including the difficulties of grading the private experiences of students. The presentation will include occasions of shared 2 meaning making as well as private reflection upon the role tension from being a teacher, researcher and confidant

Identifying the Causal Effect of Alcohol Abuse on the Perpetration of Intimate Partner Violence by Men Using a Natural Experiment

Intimate partner violence (IPV) is widespread among women, with substantial and long-lasting negative consequences. Researchers have documented a strong positive correlation between alcohol abuse and IPV. Yet prior researchers have struggled with the problem of the potential endogeneity of alcohol abuse. In this paper, we deal with this problem by exploring a unique instrumental variable - the September 11 terrorist attack (9/11) - in Wave III of the National Longitudinal Study of Adolescent Health. 9/11 was found in our data to lead to a significant increase in the frequency of alcohol abuse for respondents interviewed just after 9/11 compared to those interviewed before. Our OLS results indeed confirm earlier research of a strong positive correlation between alcohol abuse and IPV. However, the 2SLS results show no statistically significant effect of alcohol abuse on IPV. These results indicate that alcohol abuse might not have causal effects on IPV, and therefore have important policy implications

The Effect of Family Size on Education: New Evidence from China's One Child Policy

Social scientists theorize that the inverse relationship between socio-economic status and family size represents a trade-off between the quality and quantity of children. Evaluating this hypothesis empirically requires addressing the simultaneity of the quality and quantity decisions. Researchers have used the unanticipated birth of twins as exogenous variation in family size or the sex composition of the first two children as an instrument for family size with mixed results. We exploit a different source of exogenous variation in family size. The One Child Policy (OCP) in China dramatically reduced Chinese fertility and we examine how the OCP has affected the educational attainment of Chinese migrants to the U.S. Using data from the American Community Survey (2009-2012) and a difference-in-differences strategy our results support the quality-quantity tradeoff theory. We find that education increased more for Chinese migrants born after the OCP than their counterparts from other East Asian countries