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Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...
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Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
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The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
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A cause for concern.

Jessica Hamzelou

    New Scientist (1971)
    |June 11, 2020
    PubMed
    Summary

    The UK government

    Area of Science:

    • Public Health
    • Government Policy
    • Epidemiology

    Background:

    • The UK government has made public its scientific advice regarding the COVID-19 pandemic.
    • Independent experts have reviewed this released information.

    Purpose of the Study:

    • To assess the quality and impact of the scientific advice provided to the UK government on COVID-19.
    • To gauge the reaction of independent scientific experts to the transparency of government-received scientific advice.

    Main Methods:

    • Analysis of publicly released scientific documents.
    • Qualitative assessment by independent experts.

    Main Results:

    • Independent experts expressed dissatisfaction with the released scientific advice.

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  • Concerns were raised regarding the transparency and comprehensiveness of the advice.

    • Conclusions:

    • The scientific community's reception to the UK government's COVID-19 advice release was largely negative.
    • Further improvements in transparency and scientific rigor are suggested.