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Related Concept Videos

Heart Sounds01:15

Heart Sounds

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Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
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Unrealistic Optimism Bias01:30

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Unrealistic optimism bias is the tendency to overestimate the likelihood of positive outcomes. This cognitive bias makes individuals believe they are less likely to experience failures, setbacks, or risks and more likely to succeed than others. For example, people may assume they are less prone to health issues, accidents, or financial struggles than their peers, even when they share similar risk factors.One key component of this bias is the above-average effect, where individuals perceive...
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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Deception is a pervasive aspect of human communication. Empirical studies have shown that most individuals engage in some form of deceit on a daily basis, with approximately 20% of social exchanges involving deceptive elements. Lying follows a developmental trajectory, peaking during adolescence and declining with age, possibly due to the maturation of cognitive control and social accountability.Cognitive and Social Factors in Deception DetectionDespite its prevalence, accurately detecting...
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Sound Waves: Resonance01:14

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Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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Sound Intensity00:58

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The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...
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The Deese-Roediger-McDermott DRM Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
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Hunt's 'sincere' words only strike a false note.

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    NHS staff, including the Royal College of Midwives, are striking over pay freezes. This action aims to influence ministers to reconsider pay rates for 1.3 million health service employees.

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    Area of Science:

    • Healthcare policy and industrial relations.
    • Public sector workforce economics.
    • National Health Service (NHS) operational impacts.

    Background:

    • Historic industrial action by NHS staff, including the Royal College of Midwives, over pay disputes.
    • Government decision to freeze pay rates affecting 1.3 million health service employees.
    • The significance of the first strike in over 30 years and the first for the Royal College of Midwives.

    Discussion:

    • Analysis of the potential impact of industrial action on government pay policy.
    • The role of staff sacrifice in advocating for improved conditions across the NHS.
    • The broader implications of pay disputes for public sector services and staff morale.

    Key Insights:

    • NHS staff are undertaking unprecedented industrial action to protest pay freezes.
    • The strike is a critical juncture for the government to reassess its approach to NHS pay.
    • Collective action by healthcare professionals highlights deep-seated concerns regarding compensation and its effect on the workforce.

    Outlook:

    • Potential for policy changes regarding NHS staff pay rates.
    • The long-term effects of current industrial disputes on staff retention and recruitment.
    • Future negotiations and strategies for resolving pay-related conflicts within the public health sector.