Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Perception of Sound Waves01:01

Perception of Sound Waves

5.9K
The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
5.9K
Vision01:24

Vision

61.0K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
61.0K
Sound as Pressure Waves01:17

Sound as Pressure Waves

4.7K
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
4.7K
Channels of Non-Verbal Communication01:28

Channels of Non-Verbal Communication

590
Non-verbal communication plays a critical role in human interaction, influencing how individuals perceive emotions and psychological states. It operates through four primary channels: facial expressions, eye contact, body language, and touch. These non-verbal cues help convey meaning beyond spoken language and are often culturally influenced.Facial Expressions and Emotional RecognitionFacial expressions are among the most powerful and universal forms of non-verbal communication. Research has...
590
Light Acquisition02:16

Light Acquisition

9.7K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.7K
Hearing01:31

Hearing

58.3K
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.
58.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Activism to Modify the Social Determinants of Health: The Role of Evaluation.

Health education & behavior : the official publication of the Society for Public Health Education·2026
Same author

Food & Beverage Industry Activities That Influence Population Health: Development of the HEALTH-CORP-FB Typology.

International journal of social determinants of health and health services·2026
Same author

Do ESG Frameworks Capture Corporate Health Impacts? An Analysis of the Food and Beverage Industry.

International journal of environmental research and public health·2026
Same author

Exposure to and Impact of Unhealthy Food Marketing on Adolescents and Young Adults: A Narrative Review and Research Agenda.

Obesity reviews : an official journal of the International Association for the Study of Obesity·2025
Same author

Toward Monitoring and Addressing the Commercial Determinants of Health: Where Can We Go From Here?

The Milbank quarterly·2025
Same author

Food Access in New York City During the COVID-19 Pandemic: Social Media Monitoring Study.

JMIR formative research·2025

Related Experiment Video

Updated: Mar 11, 2026

Determining 3D Flow Fields via Multi-camera Light Field Imaging
14:25

Determining 3D Flow Fields via Multi-camera Light Field Imaging

Published on: March 6, 2013

17.2K

Voices Through Cameras.

May May Leung1, Alen Agaronov2, Tara Entwistle1

  • 11 Hunter College School of Urban Public Health, New York, NY, USA.

Health Promotion Practice
|November 23, 2016
PubMed
Summary

Youth used photovoice, a participatory research method, to explore food justice issues in their community. They identified key influences on food choices and proposed solutions for a healthier food environment.

Keywords:
child/adolescent healthcommunity-based participatory researchfood justicehealth researchminority healthphotovoice

More Related Videos

Virtual Agent for Real-Time Motivational Interviewing by Integrating Adaptive Nonverbal Behavior and Language Models
07:14

Virtual Agent for Real-Time Motivational Interviewing by Integrating Adaptive Nonverbal Behavior and Language Models

Published on: December 23, 2025

396
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.1K

Related Experiment Videos

Last Updated: Mar 11, 2026

Determining 3D Flow Fields via Multi-camera Light Field Imaging
14:25

Determining 3D Flow Fields via Multi-camera Light Field Imaging

Published on: March 6, 2013

17.2K
Virtual Agent for Real-Time Motivational Interviewing by Integrating Adaptive Nonverbal Behavior and Language Models
07:14

Virtual Agent for Real-Time Motivational Interviewing by Integrating Adaptive Nonverbal Behavior and Language Models

Published on: December 23, 2025

396
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.1K

Area of Science:

  • Community-based participatory research
  • Public health
  • Youth engagement

Background:

  • Empowering youth is crucial for sustainable health behaviors.
  • Photovoice facilitates community engagement and advocacy for underserved populations.

Purpose of the Study:

  • To understand youth perceptions of food justice in their community.
  • To identify solutions for positive change in the local food environment using photovoice.

Main Methods:

  • A 24-week after-school food justice program involving twelve minority youth.
  • Six photovoice sessions with three photo assignments exploring influences on healthy/unhealthy eating.
  • Photo-guided interviews and discussions analyzed using inductive and deductive coding.

Main Results:

  • Five major themes emerged: food industry/safety attitudes, environmental/social influences on food choices, diet's health impact, and proposed solutions.
  • Youth actively reflected on their food environments and shared findings through a photo exhibit.

Conclusions:

  • Photovoice is an effective tool for youth to critically examine their food environments.
  • This method empowers youth to advocate for positive changes in community food systems.