The history of a habit: jogging as a palliative to sedentariness in 1960s America

This article provides an account of the emergence of jogging as mass physical fitness practice in America in the 1960s. It explores how jogging was configured as a physical fitness activity suitable for sedentary middle-aged men and women. Jogging developed as a counter to the ill-effects of habits entrained by the increasingly sedentary lifestyles of modern industrialized urban and suburban dwellers. The paper traces the development of jogging as a defined exercise routine at the University of Oregon, Eugene, Oregon. Focusing on the moment when jogging is ‘invented’ as a recognizable fitness practice tells a great deal about the origin of contemporary regimes of physical fitness for the middle-aged population and how they have evolved. It also points to the significance of understanding how the shaping of corporeal habits play into the making of (1) individual bodies, (2) common practices of corporeal care and activity, and (3) environments of physical activity

Five Thousand Feet and Below: The Failure to Adequately Regulate Deepwater Oil Production Technology

Oil and gas production in the Gulf of Mexico is an important aspect of our domestic energy strategy, and to successfully obtain oil from deep beneath the ocean floor. in thousands of feet of water, an impressive array of technology is utilized by the oil and gas industry. One of the many lessons learned, however, from the Deepwater Horizon disaster is that this technology can present significant risks to human life and the environment if it fails. This Article presents an overview of the technology used to conduct deepwater oil and gas drilling operations, and then examines how the failure to adequately regulate this risky technology played a major role in the Deepwater Horizon catastrophe. This Article also summarizes the actions taken by regulators in response, and questions whether the actions taken are sufficient to prevent another deepwater disaster. The Article concludes by suggesting a number of other actions for consideration by policymakers to reduce the risks associated with producing oil from tens of thousands of feet beneath the ocean’s floor

The BP Deepwater Horizon: A Cautionary Tale for CCS, Hydrofracking, Geoengineering and Other Emerging Technologies with Environmental and Human Health Risks

This Article first discusses the technological issues surrounding the BP Deepwater Horizon and summarizes how regulator and industry reliance on an inadequate fail-safe device played a crucial role in this disaster. Next, I discuss the fundamentals of carbon capture and sequestration, hydraulic fracturing, and geoengineering; that is, I attempt to capture what they involve, followed by the environmental and human health risks they present. I then summarize the current or proposed regulation of these technologies and analyze whether those regulations are sufficient to adequately protect human health and the environment. I conclude with recommendations for policymakers and regulators to consider in light of these rapidly unfolding technologies that, it is hoped, will provide guidance to minimize the risks associated with each of them

Aircraft engine nozzle

A variable area exit nozzle arrangement for an aircraft engine was a substantially reduced length and weight which comprises a number of longitudinally movable radial vanes and a number of fixed radial vanes. The movable radial vanes are alternately disposed with respect to the fixed radial vanes. A means is provided for displacing the movable vanes along the longitudinal axis of the engine relative to the fixed radial vanes which extend across the main exhaust flow of the engine

Jet engine air intake system

An axisymmetric air intake system for a jet aircraft engine comprising a fixed cowl extending outwardly from the face of the engine, a centerbody coaxially disposed within the cowl, and an actuator for axially displacing the centerbody within the cowl was developed. The cowl and centerbody define a main airflow passageway therebetween, the configuration of which is changed by displacement of the centerbody. The centerbody includes a forwardly-located closeable air inlet which communicates with a centerbody auxiliary airflow passageway to provide auxiliary airflow to the engine. In one embodiment, a system for opening and closing the centerbody air inlet is provided by a dual-member centerbody, the forward member of which may be displaced axially with respect to the aft member

The Metallicities of Stars With and Without Transiting Planets

Host star metallicities have been used to infer observational constraints on planet formation throughout the history of the exoplanet field. The giant planet metallicity correlation has now been widely accepted, but questions remain as to whether the metallicity correlation extends to the small terrestrial-sized planets. Here, we report metallicities for a sample of 518 stars in the Kepler field that have no detected transiting planets and compare their metallicity distribution to a sample of stars that hosts small planets (Rp < 1.7 R_Earth). Importantly, both samples have been analyzed in a homogeneous manner using the same set of tools (Stellar Parameters Classification tool; SPC). We find the average metallicity of the sample of stars without detected transiting planets to be [m/H]_SNTP,dwarf = -0.02 +- 0.02 dex and the sample of stars hosting small planets to be [m/H]_STP = -0.02 +- 0.02 dex. The average metallicities of the two samples are indistinguishable within the uncertainties, and the two-sample Kolmogorov-Smirnov test yields a p-value of 0.68 (0.41 sigma), indicating a failure to reject the null hypothesis that the two samples are drawn from the same parent population. We conclude that the homogeneous analysis of the data presented here support the hypothesis that stars hosting small planets have a metallicity similar to stars with no known transiting planets in the same area of the sky.Comment: Accepted for publication in Ap

A NASTRAN model of a large flexible swing-wing bomber. Volume 5: NASTRAN model development-fairing structure

The NASTRAN model plan for the fairing structure was expanded in detail to generate the NASTRAN model of this substructure. The grid point coordinates, element definitions, material properties, and sizing data for each element were specified. The fairing model was thoroughly checked out for continuity, connectivity, and constraints. The substructure was processed for structural influence coefficients (SIC) point loadings to determine the deflection characteristics of the fairing model. Finally, a demonstration and validation processing of this substructure was accomplished using the NASTRAN finite element program. The bulk data deck, stiffness matrices, and SIC output data were delivered

A NASTRAN model of a large flexible swing-wing bomber. Volume 3: NASTRAN model development-wing structure

The NASTRAN model plan for the wing structure was expanded in detail to generate the NASTRAN model for this substructure. The grid point coordinates were coded for each element. The material properties and sizing data for each element were specified. The wing substructure model was thoroughly checked out for continuity, connectivity, and constraints. This substructure was processed for structural influence coefficients (SIC) point loadings and the deflections were compared to those computed for the aircraft detail model. Finally, a demonstration and validation processing of this substructure was accomplished using the NASTRAN finite element program. The bulk data deck, stiffness matrices, and SIC output data were delivered

Absolute dimensions of the G7+K7 eclipsing binary star IM Virginis: Discrepancies with stellar evolution models

We report extensive spectroscopic and differential photometric BVRI observations of the active, detached, 1.309-day double-lined eclipsing binary IM Vir, composed of a G7-type primary and a K7 secondary. With these observations we derive accurate absolute masses and radii of M(1) = 0.981 +/- 0.012 M(Sun), M(2) = 0.6644 +/- 0.0048 M(Sun), R(1) = 1.061 +/- 0.016 R(Sun), and R(2) = 0.681 +/- 0.013 R(Sun) for the primary and secondary, with relative errors under 2%. The effective temperatures are 5570 +/- 100 K and 4250 +/- 130 K. The significant difference in mass makes this a favorable case for comparison with stellar evolution theory. We find that both stars are larger than the models predict, by 3.7% for the primary and 7.5% for the secondary, as well as cooler than expected, by 100 K and 150 K, respectively. These discrepancies are in line with previously reported differences in low-mass stars, and are believed to be caused by chromospheric activity, which is not accounted for in current models. The effect is not confined to low-mass stars: the rapidly-rotating primary of IM Vir joins the growing list of objects of near-solar mass (but still with convective envelopes) that show similar anomalies. The comparison with the models suggests an age of 2.4 Gyr for the system, and a metallicity [Fe/H] of approximately -0.3 that is consistent with other indications, but requires confirmation.Comment: 14 pages, 13 figures. Accepted for publication in Ap