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

Absorption of Radiation01:05

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
Biological Effects of Radiation02:59

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...

You might also read

Related Articles

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

Sort by
Same author

Correction to: Approach for the vertical wind speed profile implemented in the UTCI basics blocks UTCI applications at the urban pedestrian level.

International journal of biometeorology·2025
Same author

The shading effect of single trees on human thermal sensation during summer: a case study in Jeju, Republic of Korea.

International journal of biometeorology·2025
Same author

Approach for the vertical wind speed profile implemented in the UTCI basics blocks UTCI applications at the urban pedestrian level.

International journal of biometeorology·2024
Same author

A simple technique for the traditional method to estimate mean radiant temperature.

International journal of biometeorology·2021
Same author

Human body area factors for radiation exchange analysis: standing and walking postures.

International journal of biometeorology·2010

Related Experiment Video

Updated: May 12, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Advanced view factor analysis method for radiation exchange.

Sookuk Park1, Stanton E Tuller

  • 1Department of Geography, University of Victoria, P.O. Box 3060 Stn CSC, Victoria, BC, Canada, V8W 3R4, sooland@gmail.com.

International Journal of Biometeorology
|March 30, 2013
PubMed
Summary
This summary is machine-generated.

The HURES model accurately determines complex view factor patterns using fisheye lens photos. It offers improved sky view factor estimates compared to other models, aiding urban climate analysis.

More Related Videos

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources
05:18

Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources

Published on: October 6, 2023

Related Experiment Videos

Last Updated: May 12, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources
05:18

Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources

Published on: October 6, 2023

Area of Science:

  • Urban climatology
  • Environmental modeling
  • Human thermal comfort

Background:

  • Accurate calculation of view factors is crucial for understanding urban microclimates and their impact on human thermal comfort.
  • Existing models like ENVI-met and RayMan Pro have limitations in estimating complex view factor patterns, particularly for sky view.

Purpose of the Study:

  • To present the HURES model, a novel raster-based method for determining complex view factor patterns from fisheye lens photographs.
  • To evaluate the performance of the HURES model against existing software and analyze its suitability for urban environmental studies.

Main Methods:

  • The HURES model divides the entire sphere into 13 view factors, utilizing Johnson and Watson's analysis method.
  • Tests were conducted at two urban sites (Nanaimo, Canada and Changwon, Korea) using fisheye lens photographs.
  • The study suggests optimal settings for 3D computer simulations: a 10° interval of rotation angle and 100m distance for annuli.

Main Results:

  • HURES provided reasonable view factor results in urban settings.
  • HURES demonstrated superior estimation of open sky view factors compared to ENVI-met 3.1 and RayMan Pro.
  • All tested models, including HURES, tended to underestimate the sky view factor.

Conclusions:

  • The HURES model enables rapid determination of complex view factor patterns, facilitating analysis of their effects on human thermal sensation.
  • Differences in view factor patterns significantly influence thermal indices like Predicted Mean Vote (PMV), Physiological Equivalent Temperature (PET), and Universal Thermal Climate Index (UTCI).
  • The model's findings highlight the importance of considering detailed view factor distributions for accurate urban thermal environment assessments.