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Related Concept Videos

Fatigue01:21

Fatigue

Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
Stress-Strain Diagram - Brittle Materials01:24

Stress-Strain Diagram - Brittle Materials

Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
Design Consideration01:22

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
Framing Effects03:26

Framing Effects

Information is everywhere and its presentation—such as how and when items are presented—can impact our perceptions and decisions surrounding the info. This broad concept umbrellas framing effects—influences that occur due to the way information is framed in its appearance, whether it’s purely the order or the specific wording of a message. Let’s take a look at numerous ways in which two versions of something can objectively say the same thing, yet we respond in different ways based on the...
Plasticity00:58

Plasticity

Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
Concepts of Health and Illness01:29

Concepts of Health and Illness

Health is a condition of the body, mind, and spirit where an individual remains free from illness. Similarly, wellness is an active state, including living a lifestyle that promotes physical, mental, and emotional health. Physical health is critical for the overall well-being and can be affected by lifestyle, activity level, diet, and behavior. The highest attainable standard of health is a fundamental and universal human right. Consider Lisa, a fifteen-year-old born with congenital...

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Related Experiment Video

Updated: May 25, 2026

Frailty Assessment in an Aging Mouse Model
06:58

Frailty Assessment in an Aging Mouse Model

Published on: September 23, 2025

[Frailty; a fragile concept].

R M Collard1, R C Oude Voshaar

  • 1Psychiatrie, Nijmegen. r.collard@psy.umcn.nl

Tijdschrift Voor Psychiatrie
|January 13, 2012
PubMed
Summary
This summary is machine-generated.

Frailty, a state of low physical reserve, lacks a clear definition. Research suggests a link between frailty and psychopathology, particularly depression, though the directionality remains unclear.

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Identifying Frailty Using Point-of-Care Ultrasonography: Image Acquisition and Assessment
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Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty
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Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty

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Last Updated: May 25, 2026

Frailty Assessment in an Aging Mouse Model
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Published on: September 23, 2025

Identifying Frailty Using Point-of-Care Ultrasonography: Image Acquisition and Assessment
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Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty
05:53

Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty

Published on: July 24, 2013

Area of Science:

  • Gerontology
  • Psychiatry
  • Clinical Medicine

Context:

  • Frailty is a critical state of reduced physiological reserve, increasing vulnerability to health disturbances.
  • Understanding frailty is crucial for managing health in aging populations.

Purpose:

  • To review frailty operationalizations and explore its relationship with psychopathology.
  • To identify consensus and gaps in frailty research.

Summary:

  • 35 frailty operationalizations were identified, including single measurements, syndrome diagnoses, and dimensional approaches.
  • A link between frailty and psychopathology, especially depression, was noted, but causality is undetermined.
  • No consensus exists on frailty's definition, hindering research.

Impact:

  • Recommends using physical frailty syndrome diagnoses in gerontopsychiatric research.
  • Aims to clarify the interplay between psychopathology and aging mechanisms.
  • Highlights the need for standardized frailty assessment.