243 research outputs found

    Issues and Outcomes, Guidance, and Indeterminacy: A Reply to Professor John Rogers and Others

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    There is now a small but growing literature on the proper voting procedure for multijudge panels. Professor John Rogers began the most recent round of thinking about these vexing issues, arguing that a judge on a multimember panel should never vote against the result of his or her own reasoning by deferring to a majority on a sub-issue on which the judge differs. We responded, arguing in favor of just such action, which we labeled issue voting. We criticized Professor Rogers\u27s preferred mode of multimember court adjudication, which we labeled outcome voting, on the grounds that it provided limited guidance and inevitably produced path dependence and incoherence in the law. Professors Lewis Kornhauser and Lawrence Sager presented a third position that no simple rule favoring one voting protocol in all paradoxical cases can produce universally appealing results. They set forth a mechanism, which they called the metavote procedure, by which courts would resolve the question of which of these two voting rules to adopt in any particular case. Professor Maxwell Stearns also has examined these issues in detail, from a social choice perspective. Rogers now joins the fray once again, calling for blanket adoption of outcome voting for multimember courts, finding our arguments (and Kornhauser and Sager\u27s) unpersuasive on a number of grounds. Professor Rogers\u27s critique makes it clear that we did not deal with these questions definitively in our earlier paper. We are still unpersuaded, however, that his solution is the better one. In this brief Reply, we will sketch out a partial answer to Rogers\u27s concerns

    Review of battery powered embedded systems design for mission-critical low-power applications

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    The applications and uses of embedded systems is increasingly pervasive. Mission and safety critical systems relying on embedded systems pose specific challenges. Embedded systems is a multi-disciplinary domain, involving both hardware and software. Systems need to be designed in a holistic manner so that they are able to provide the desired reliability and minimise unnecessary complexity. The large problem landscape means that there is no one solution that fits all applications of embedded systems. With the primary focus of these mission and safety critical systems being functionality and reliability, there can be conflicts with business needs, and this can introduce pressures to reduce cost at the expense of reliability and functionality. This paper examines the challenges faced by battery powered systems, and then explores at more general problems, and several real-world embedded systems

    Long term sequelae after SARS-CoV-2 infection in children: a household study

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    BACKGROUND: In children persistent symptoms after SARS-CoV-2 infection have been reported, however, duration and characteristics of symptoms in previously healthy children remain unclear. Therefore this study aimed to evaluate persisting symptoms in children at 6 and 12 months after a SARS-CoV-2 infection. METHODS: In this prospective cohort study households with a confirmed SARS-CoV-2 positive outbreak were matched 1:1 to household controls from SARS-CoV-2 negative outbreaks. These households completed questionnaires at 6 and 12 months on the presence and severity of SARS-CoV-2 related symptoms, general well-being/functioning, cognition, persisting symptoms and quality of life. FINDINGS: None of the children who had a SARS-CoV-2 infection during the study reported persistent symptoms at 6 and 12 months after infection, whereas almost 8% of the children with a negative RT-PCR test during the study reported symptoms such as coughing and mild fever, however, no significant differences were found. In addition, for all other outcomes, no differences were observed between the two groups. TAKE HOME MESSAGE: Post-acute sequelae of mild SARS-CoV-2 infections appears to be uncommon in previously healthy children

    Drug-gene interactions of antihypertensive medications and risk of incident cardiovascular disease: a pharmacogenomics study from the CHARGE consortium

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    Background Hypertension is a major risk factor for a spectrum of cardiovascular diseases (CVD), including myocardial infarction, sudden death, and stroke. In the US, over 65 million people have high blood pressure and a large proportion of these individuals are prescribed antihypertensive medications. Although large long-term clinical trials conducted in the last several decades have identified a number of effective antihypertensive treatments that reduce the risk of future clinical complications, responses to therapy and protection from cardiovascular events vary among individuals. Methods Using a genome-wide association study among 21,267 participants with pharmaceutically treated hypertension, we explored the hypothesis that genetic variants might influence or modify the effectiveness of common antihypertensive therapies on the risk of major cardiovascular outcomes. The classes of drug treatments included angiotensin-converting enzyme inhibitors, beta-blockers, calcium channel blockers, and diuretics. In the setting of the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium, each study performed array-based genome-wide genotyping, imputed to HapMap Phase II reference panels, and used additive genetic models in proportional hazards or logistic regression models to evaluate drug-gene interactions for each of four therapeutic drug classes. We used meta-analysis to combine study-specific interaction estimates for approximately 2 million single nucleotide polymorphisms (SNPs) in a discovery analysis among 15,375 European Ancestry participants (3,527 CVD cases) with targeted follow-up in a case-only study of 1,751 European Ancestry GenHAT participants as well as among 4,141 African-Americans (1,267 CVD cases). Results Although drug-SNP interactions were biologically plausible, exposures and outcomes were well measured, and power was sufficient to detect modest interactions, we did not identify any statistically significant interactions from the four antihypertensive therapy meta-analyses (Pinteraction > 5.0×10−8). Similarly, findings were null for meta-analyses restricted to 66 SNPs with significant main effects on coronary artery disease or blood pressure from large published genome-wide association studies (Pinteraction ≥ 0.01). Our results suggest that there are no major pharmacogenetic influences of common SNPs on the relationship between blood pressure medications and the risk of incident CVD

    Better evidence, better decisions, better environment: emergent themes from the first environmental evidence conference

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    The first international Collaboration for Environmental Evidence (CEE) conference took place in August 2016 at the Swedish Museum of Natural History in Stockholm with nearly 100 participants from 14 countries. This conference reflected and contributed to th

    NACHOS, a CubeSat-Based High-Resolution UV-Visible Hyperspectral Imager for Remote Sensing of Trace Gases: System Overview, Science Objectives, and Preliminary Results

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    The Nano-satellite Atmospheric Chemistry Hyperspectral Observation System (NACHOS) is a high-throughput (f/2.9), high spectral resolution (1.3 nm optical, 0.57 nm sampling) hyperspectral imager covering the 300-500 nm spectral region with 350 spectral bands. The combined 1.5U instrument payload and 1.5U spacecraft bus comprise a 3U CubeSat. Spectroscopically similar to NASA’s Ozone Monitoring Instrument (OMI), which provides wide-field coverage at ~20 km spatial resolution, NACHOS offers complementary targeted measurements at far higher spatial resolution of ~0.4 km/pixel from 500 km altitude over its 15 ̊ across-track field of view. NACHOS incorporates highly streamlined onboard gas-retrieval algorithms, alleviating the need to routinely downlink massive hyperspectral data cubes. This paper discusses the instrument design, requirements leading to it, preliminary results, and science goals, including monitoring NO2 as a proxy for anthropogenic greenhouse gases, low-level degassing of SO2 and halogen oxides at pre-eruptive volcanoes, and formaldehyde from wildfires. Aiming for an eventual many-satellite constellation providing both high spatial resolution and frequent target revisits, the current NACHOS project is launching two CubeSats, the first already launched to the International Space Station aboard the NG-17 Cygnus vehicle on February 19, 2022 and awaiting deployment to its final orbit in June, and the second launching June 29, 2022

    Greater temperature sensitivity of plant phenology at colder sites: implications for convergence across northern latitudes

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    Warmer temperatures are accelerating the phenology of organisms around the world. Temperature sensitivity of phenology might be greater in colder, higher latitude sites than in warmer regions, in part because small changes in temperature constitute greater relative changes in thermal balance at colder sites. To test this hypothesis, we examined up to 20 years of phenology data for 47 tundra plant species at 18 high-latitude sites along a climatic gradient. Across all species, the timing of leaf emergence and flowering was more sensitive to a given increase in summer temperature at colder than warmer high-latitude locations. A similar pattern was seen over time for the flowering phenology of a widespread species, Cassiope tetragona. These are among the first results highlighting differential phenological responses of plants across a climatic gradient and suggest the possibility of convergence in flowering times and therefore an increase in gene flow across latitudes as the climate warms
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