4,158 research outputs found

    Forced Medical Treatment of Pregnant Women: Compelling Each to Live as Seems Good to the Rest

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    This Article addresses the question of when, if ever, it is ethically and legally permissible to compel a competent, pregnant woman to undergo medical treatment for the sake of her fetus. The Article begins with a discussion of the various clinical situations in which maternal-fetal conflict may arise and the perceptions of clinicians faced with a maternal refusal of treatment. It then explores the ethical questions raised if a physician were to compel a pregnant woman to undergo treatment for the benefit of her fetus. This discussion is followed by an investigation of the legal status of the fetus and the legal interests of the pregnant woman. The Article concludes that pregnant women should not be legally compelled by judges, doctors, or society to accept medical treatment against their wishes

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    Space-Time Distribution of G-Band and Ca II H-Line Intensity Oscillations in Hinode/SOT-FG Observations

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    We study the space-time distributions of intensity fluctuations in 2 - 3 hour sequences of multi-spectral, high-resolution, high-cadence broad-band filtergram images (BFI) made by the SOT-FG system aboard the Hinode spacecraft. In the frequency range 5.5 < f < 8.0 mHz both G-band and Ca II H-line oscillations are suppressed in the presence of magnetic fields, but the suppression disappears for f > 10 mHz. By looking at G-band frequencies above 10 mHz we find that the oscillatory power, both at these frequencies and at lower frequencies too, lies in a mesh pattern with cell scale 2 - 3 Mm, clearly larger than normal granulation, and with correlation times on the order of hours. The mesh pattern lies in the dark lanes between stable cells found in time-integrated G-band intensity images. It also underlies part of the bright pattern in time-integrated H-line emission. This discovery may reflect dynamical constraints on the sizes of rising granular convection cells together with the turbulence created in strong intercellular downflows.Comment: 24 pages, 15 figure

    Ares I-X Upper Stage Simulator Compartment Pressure Comparisons During Ascent

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    Predictions of internal compartment pressures are necessary in the design of interstage regions, systems tunnels, and protuberance covers of launch vehicles to assess potential burst and crush loading of the structure. History has proven that unexpected differential pressure loads can lead to catastrophic failure. Pressures measured in the Upper Stage Simulator (USS) compartment of Ares I-X during flight were compared to post-flight analytical predictions using the CHCHVENT chamber-to-chamber venting analysis computer program. The measured pressures were enveloped by the analytical predictions for most of the first minute of flight but were outside of the predictions thereafter. This paper summarizes the venting system for the USS, discusses the probable reasons for the discrepancies between the measured and predicted pressures, and provides recommendations for future flight vehicles
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