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Related Concept Videos

Virtual Work01:20

Virtual Work

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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...
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Principle of Virtual Work: Problem Solving01:13

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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.
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Virtual Work for a System of Connected Rigid Bodies01:06

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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.
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Appendicitis-II: Diagnostic Studies and Management01:29

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Myasthenia Gravis: Diagnostic Tests01:15

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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
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The use of Biofeedback in Clinical Virtual Reality: The INTREPID Project
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Portable System for Neuro-Optical Diagnostics Using Virtual Reality Display.

Craig Versek1, Armen Rissmiller2, Anthony Tran2

  • 1NeuroFieldz Inc, 41 Esty Farm Road, Newton, MA.

Military Medicine
|March 23, 2019
PubMed
Summary
This summary is machine-generated.

A novel wireless brain sensor system, NeuroDotVR, aids in diagnosing vision and neurological disorders by measuring visual evoked potentials and fields. Its unique dual-mode operation offers enhanced signal sensitivity for improved clinical applications.

Keywords:
EEGTBIVEPamblyopiaglaucomaneurologyophthalmologyportable systemvision diagnostics

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Medical Devices

Background:

  • Diagnosing vision and neurological disorders requires sensitive and accurate measurement tools.
  • Existing methods for measuring brain activity and visual responses can be limited in sensitivity and scope.

Purpose of the Study:

  • To describe a new product prototype system, NeuroDotVR, for diagnosing vision and neurological disorders.
  • To introduce a novel wireless NeuroDot brain sensor with unique dual-mode capabilities.

Main Methods:

  • Utilized a wireless NeuroDot brain sensor in both electroencephalography and electric field encephalography modes.
  • Displayed custom visual stimuli on a smartphone within a virtual reality headset.
  • Measured steady-state and transient visual evoked potentials and fields using reversing checkerboard stimuli.

Main Results:

  • Demonstrated quantitative measurement of visual evoked potentials and fields.
  • Showcased improved signal sensitivity and new diagnostic information with electric field encephalography mode.
  • Presented preliminary data sets from case studies in amblyopia, glaucoma, and dark adaptation.

Conclusions:

  • The NeuroDotVR system shows potential for diagnosing vision and neurological disorders.
  • The novel NeuroDot brain sensor's dual-mode operation offers enhanced diagnostic capabilities.
  • Further product development and scientific studies are warranted to explore clinical applications.