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Stress Concentrations01:24

Stress Concentrations

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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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Holter Monitor: 24-Hour Monitoring01:23

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Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
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Physiological Foundation of Stress01:24

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Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
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Exercise Stress Test01:26

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Introduction
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Stress and Mental Health01:30

Stress and Mental Health

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Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
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Introduction to Stress and Lifestyle01:27

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Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
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Occupational Stress Monitoring Using Biomarkers and Smartwatches: A Systematic Review.

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This review explores wrist wearables for stress identification. While challenging, developing these devices using physiological and chemical sensors for stress surveillance is feasible.

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Area of Science:

  • Biomedical Engineering
  • Wearable Technology
  • Stress Monitoring

Background:

  • Stress identification is crucial for public health.
  • Existing stress assessment often relies on subjective questionnaires.
  • Technological advancements offer potential for objective stress monitoring.

Purpose of the Study:

  • To systematically review scientific literature on wrist wearables for stress identification.
  • To inform the development of a stress surveillance system.
  • To identify key technologies and biomarkers for stress detection.

Main Methods:

  • Systematic literature review following PRISMA guidelines.
  • Selection of 10 relevant articles from 38 reviewed.
  • Analysis of technologies and biomarkers used in wearable stress detection.

Main Results:

  • Diverse technologies are employed in wrist wearables for stress monitoring.
  • Current stress assessment predominantly uses standardized questionnaires.
  • Key biomarkers include heart rate variation, cortisol, skin conductance, body temperature, and wrist blood volume.

Conclusions:

  • Developing wrist wearables for stress identification is technically challenging.
  • The integration of physiological and chemical sensors is promising.
  • Such devices hold potential for practical application in stress surveillance.