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

The Scope of Physics01:17

The Scope of Physics

52.1K
Physics is concerned with the interactions of energy, matter, space, and time, in order to discover the underlying mechanisms that underpin all phenomena. The word "physics" comes from the Greek word "phúsis", which means nature. Physics seeks to comprehend the natural world around us at its most fundamental level. It emphasizes the use of quantitative laws to do this, which could be valuable in other fields that want to push the performance boundaries of present...
52.1K
Economies of Scope01:26

Economies of Scope

550
Economies of scope refer to a firm's cost advantages by producing a wider variety of products rather than focusing on a single product. Economies of scope are achieved when the total cost of producing multiple products together is less than the sum of producing each product independently. This production efficiency is primarily possible due to sharing common resources across the different types of outputs. This includes skilled labor, an efficient managerial team, or advanced technologies...
550
Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes07:55

Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

10.7K
A straight-forward and robust method to identify potential regulatory motifs in co-regulated genes is presented. SCOPE does not require any user parameters and returns motifs that represent excellent candidates for regulatory signals. The identification of such regulatory signals helps to understand the underlying...
10.7K
Concentration Cells02:41

Concentration Cells

25.6K
A concentration cell is a type of a  voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
Consider the following voltaic cell:
25.6K
Heat and Free Expansion01:24

Heat and Free Expansion

2.8K
The work done by a thermodynamic system depends not only on the initial and final states but also on the intermediate states—that is, on the path. Like work, when heat is added to a thermodynamic system, it undergoes a change of state, and the state attained depends on the path from the initial state to the final state. Consider an ideal gas cylinder fitted with a piston. When the cylinder is heated at a constant temperature, the gas molecules absorb energy and expand slowly in a...
2.8K
Thermal Expansion01:22

Thermal Expansion

5.6K
The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air. When air is heated, it expands and becomes less dense than the surrounding air, which then exerts an upward force on the hot air to, for example, make steam and smoke rise, and hot air balloons float. The same behavior happens in all liquids and gases,...
5.6K

You might also read

Related Articles

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

Sort by
Same author

Bifacial photovoltaic micro-concentrators for space.

Optics letters·2026
Same author

Ultrathin MoS<sub>2</sub> Nanosheets via Lamp Ablation.

ACS applied materials & interfaces·2025
Same author

Aplanatic solar concentrators for tubular absorbers.

Optics letters·2024
Same author

Sine-limiting microcell solar concentrators for space.

Optics express·2022
Same author

Enhanced Algal Photosynthetic Photon Efficiency by Pulsed Light.

iScience·2020
Same author

Design and demonstration of ultra-compact microcell concentrating photovoltaics for space.

Optics express·2019

Related Experiment Video

Updated: Jan 19, 2026

Economies of Scope
01:26

Economies of Scope

550

Expansive scope of aplanatic concentrators and collimators.

Heylal Mashaal, Daniel Feuermann, Jeffrey M Gordon

    Applied Optics
    |September 11, 2019
    PubMed
    Summary

    Aplanats, optics eliminating aberration, offer new possibilities for light-emitting diodes (LEDs) and solar energy concentration. This study reviews aplanat classifications and demonstrates practical designs for improved collimation and concentration.

    Area of Science:

    • Optical Engineering
    • Radiative Transfer Optics

    Background:

    • Aplanats are optical systems that eliminate spherical aberration and coma.
    • Traditionally used in imaging, aplanats have potential in nonimaging radiative transfer applications like LEDs and solar energy.

    Purpose of the Study:

    • To review and elaborate the full scope of aplanat classifications.
    • To present new possibilities for LED collimation and solar energy concentration using aplanats.
    • To demonstrate practical, maximum-performance optical designs for various aplanat combinations.

    Main Methods:

    • Classification of aplanats based on refractive and reflective surface combinations.
    • Development of theoretical models for aplanat performance in collimation and concentration.
    • Illustrative design examples including faceted (Fresnel) and hybrid aplanats.

    More Related Videos

    The Scope of Physics
    01:17

    The Scope of Physics

    52.1K
    Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes
    07:55

    Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

    Published on: May 31, 2011

    10.7K

    Related Experiment Videos

    Last Updated: Jan 19, 2026

    Economies of Scope
    01:26

    Economies of Scope

    550
    The Scope of Physics
    01:17

    The Scope of Physics

    52.1K
    Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes
    07:55

    Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

    Published on: May 31, 2011

    10.7K

    Main Results:

    • Identification of previously unrecognized basic aplanat categories.
    • Demonstration of aplanats approaching thermodynamic limits for collimation and concentration.
    • Examples of compact and lightweight faceted aplanats.
    • Improved performance using hybrid aplanat designs.

    Conclusions:

    • Aplanats offer significant potential for enhancing light-emitting diode (LED) collimation and solar energy concentration.
    • The reviewed classifications and designs provide a comprehensive guide for practical aplanat applications.
    • Future work can leverage hybrid aplanats for further performance gains in radiative transfer.