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Related Concept Videos

Virtual Work01:20

Virtual Work

1.4K
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
1.4K
Tumor Progression02:07

Tumor Progression

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
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Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

1.7K
The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
To apply the principle of virtual work,...
1.7K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

4.7K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
4.7K
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

750
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
750
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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Progress in virtual reality and augmented reality based on holographic display.

Zehao He, Xiaomeng Sui, Guofan Jin

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    Virtual reality (VR) and augmented reality (AR) industry prospects are reviewed. Holographic displays show promise for high-resolution VR/AR, despite current challenges.

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    Area of Science:

    • Optics and Photonics
    • Computer Science
    • Human-Computer Interaction

    Background:

    • Virtual Reality (VR) and Augmented Reality (AR) technologies have evolved significantly.
    • Current VR/AR systems primarily rely on binocular vision and light field displays.
    • The industry is seeking next-generation display technologies for enhanced immersion.

    Purpose of the Study:

    • To present the industry prospects of VR and AR.
    • To predict the future of VR/AR technology using holographic displays.
    • To review investigations and analyze challenges of holographic displays for VR/AR.

    Main Methods:

    • Review of existing literature on holographic display technology for VR/AR.
    • Comparative analysis of holographic displays with binocular vision and light field displays.
    • Analysis of technical challenges and breakthroughs in holographic display development.

    Main Results:

    • Holographic display technology presents a promising future for VR/AR applications.
    • High-resolution capabilities are a key advantage of emerging holographic displays.
    • Significant technical hurdles remain in the practical implementation of holographic VR/AR.

    Conclusions:

    • Holographic displays are poised to revolutionize VR/AR with superior visual fidelity.
    • Overcoming challenges in resolution, field of view, and computational load is crucial.
    • Continued research and development in holographic technology will drive future VR/AR innovation.