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Related Concept Videos

Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

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Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
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When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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The degree of unsaturation (U), or index of hydrogen deficiency (IHD), is defined as the difference in the number of pairs of hydrogen atoms between the compound and the acyclic alkane with the same number of carbon atoms. Each double bond or ring costs two hydrogen atoms compared to a saturated analog and results in one degree of unsaturation.
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In surveying, meridians are vital reference lines to measure directions and establish accurate land orientations. Meridians run from the north to the south poles, providing a stable framework for angular measurements and mapping. Meridians are fundamental in survey design, with the primary types being astronomic, magnetic, and assumed meridians. Each type offers distinct benefits and limitations, selected based on the project's scale and precision needs.The astronomic meridian is aligned with...
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Related Experiment Video

Updated: Jan 1, 2026

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells
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Sunset.

Antonio Yaghy1

  • 1A researcher at Wills Eye Hospital's Ocular Oncology Service at in Philadelphia, Pennsylvania.

AMA Journal of Ethics
|December 27, 2019
PubMed
Summary

Patients diagnosed with illnesses often experience profound sadness, despair, and uncertainty. This reflection aims to foster empathy and understanding of their emotional journey during diagnosis.

Area of Science:

  • Psychology
  • Medical Sociology

Background:

  • Patient diagnosis can evoke significant negative emotions.
  • Understanding patient emotional responses is crucial for effective care.

Purpose of the Study:

  • To promote reflection on patient feelings post-diagnosis.
  • To encourage empathy towards patients experiencing sadness, despair, helplessness, and uncertainty.

Main Methods:

  • Visual stimulus (image of a silhouetted figure at sunset).
  • Prompts for reflective thought on patient emotional states.

Main Results:

  • Facilitates contemplation of patient emotional experiences.
  • Aids in recognizing the psychological impact of diagnosis.

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Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
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Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

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Related Experiment Videos

Last Updated: Jan 1, 2026

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells
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In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

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Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
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Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

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Conclusions:

  • Visual aids can be effective tools for promoting empathy.
  • Acknowledging patient emotions is a key aspect of supportive healthcare.