9,436 research outputs found

    Method for analyzing radiation sensitivity of integrated circuits

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    A method for analyzing the radiation sensitivity of an integrated circuit is described to determine the components. The application of a narrow radiation beam to portions of the circuit is considered. The circuit is operated under normal bias conditions during the application of radiation in a dosage that is likely to cause malfunction of at least some transistors, while the circuit is monitored for failure of the irradiated transistor. When a radiation sensitive transistor is found, then the radiation beam is further narrowed and, using a fresh integrated circuit, a very narrow beam is applied to different parts of the transistor, such as its junctions, to locate the points of greatest sensitivity

    State Strategies to Improve Quality and Efficiency: Making the Most of Opportunities in National Health Reform

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    Examines ten states' initiatives to address key components of quality and efficiency improvement, including data collection, aggregation, and standardization; public reporting; payment reform; consumer engagement; and provider engagement

    Supporting State Policymakers' Implementation of Federal Health Reform

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    Outlines the capacities states will need to implement federal healthcare reform in the areas of information and analysis, strategic implementation and planning, topic-specific technical assistance, communications, and coordination and integration

    On the Road to Better Value: State Roles in Promoting Accountable Care Organizations

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    Outlines how accountable care organizations can deliver value through incentives to manage utilization, improve quality, and curb cost growth. Profiles states supporting the model with data, new payment methods, accountability measures, and other efforts

    Strengthening Primary and Chronic Care: State Innovations to Transform and Link Small Practices

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    Presents case studies of state policies for reorganizing and improving primary and chronic care delivery among small practices, including leadership and convening, payment incentives, infrastructure support, feedback and monitoring, and certification

    A Kaluza-Klein Model with Spontaneous Symmetry Breaking: Light-Particle Effective Action and its Compactification Scale Dependence

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    We investigate decoupling of heavy Kaluza-Klein modes in an Abelian Higgs model with space-time topologies R3,1×S1\mathbb{R}^{3,1} \times S^{1} and R3,1×S1/Z2\mathbb{R}^{3,1} \times S^{1}/\mathbb{Z}_{2}. After integrating out heavy KK modes we find the effective action for the zero mode fields. We find that in the R3,1×S1\mathbb{R}^{3,1} \times S^{1} topology the heavy modes do not decouple in the effective action, due to the zero mode of the 5-th component of the 5-d gauge field A5A_{5}. Because A5A_{5} is a scalar under 4-d Lorentz transformations, there is no gauge symmetry protecting it from getting mass and A54A_{5}^{4} interaction terms after loop corrections. In addition, after symmetry breaking, we find new divergences in the A5A_{5} mass that did not appear in the symmetric phase. The new divergences are traced back to the gauge-goldstone mixing that occurs after symmetry breaking. The relevance of these new divergences to Symanzik's theorem is discussed. In order to get a more sensible theory we investigate the S1/Z2S^{1}/\mathbb{Z}_{2} compactification. With this kind of compact topology, the A5A_{5} zero mode disappears. With no A5A_{5}, there are no new divergences and the heavy modes decouple. We also discuss the dependence of the couplings and masses on the compactification scale. We derive a set of RG-like equations for the running of the effective couplings with respect to the compactification scale. It is found that magnitudes of both couplings decrease as the scale MM increases. The effective masses are also shown to decrease with increasing compactification scale. All of this opens up the possibility of placing constraints on the size of extra dimensions.Comment: 35 pages, 6 figure

    Total integrated dose testing of solid-state scientific CD4011, CD4013, and CD4060 devices by irradiation with CO-60 gamma rays

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    The total integrated dose response of three CMOS devices manufactured by Solid State Scientific has been measured using CO-60 gamma rays. Key parameter measurements were made and compared for each device type. The data show that the CD4011, CD4013, and CD4060 produced by this manufacturers should not be used in any environments where radiation levels might exceed 1,000 rad(Si)

    A Roadmap to Health Insurance for All: Principles for Reform

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    Presents principles for health insurance reform and compares the potential of three approaches -- tax incentives for the individual insurance market; mixed private-public group insurance with shared financing responsibility; and public insurance

    Organizing the U.S. Health Care Delivery System for High Performance

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    Analyzes the fragmentation of the healthcare delivery system and makes policy recommendations -- including payment reform, regulatory changes, and infrastructure -- for creating mechanisms to coordinate care across providers and settings

    New technologies for radiation-hardening analog to digital converters

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    Surveys of available Analog to Digital Converters (ADC) suitable for precision applications showed that none have the proper combination of accuracy and radiation hardness to meet space and/or strategic weapon requirements. A development program which will result in an ADC device which will serve a number of space and strategic applications. Emphasis was placed on approaches that could be integrated onto a single chip within three to five years
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