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Related Concept Videos

Design Example: Application of Archimedes' Principle01:11

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Archimedes' principle is fundamental in analyzing the buoyant force and stability of floating bodies. In this example, a wooden block with a rectangular section floats in seawater. Based on the block's dimensions, its specific gravity and the specific weight of seawater are used to find the volume of water displaced and the center of buoyancy.
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Related Experiment Video

Updated: Oct 3, 2025

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Trsper: a web-based application for Archimedes spiral analysis.

Rogan Magee1, Benjamin Yang1, Jeff Ratliff1

  • 1Department of Neurology, Sidney Kidney Medical College at Thomas Jefferson University, Philadelphia, PA, USA.

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|February 18, 2022
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Summary
This summary is machine-generated.

A new digital Archimedes spiral exam app was validated. Drawing with a stylus and specific instructions improved test consistency, enabling accurate identification of abnormal spirals for clinical use.

Keywords:
Archimedes spiralmobile devicemovement disorderstremorweb application

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Area of Science:

  • Digital Health
  • Medical Technology
  • Biomedical Engineering

Background:

  • A web-based application of the Archimedes spiral exam was developed.
  • The application incorporates clinically validated spiral metrics.
  • The study aimed to define a clinical workflow by testing drawing instructions.

Purpose of the Study:

  • To validate programmed spiral metrics in a digital Archimedes spiral exam.
  • To assess the impact of different drawing instructions and tools on exam results.
  • To establish a reliable clinical workflow for the digital spiral exam.

Main Methods:

  • An HTML5 and Javascript application was created for mobile touchscreen devices.
  • Two experiments involving 10 volunteers each were conducted to validate metrics and assess instructions/drawing implements.
  • Volunteers completed tasks involving drawing spirals under varied instruction sets and using different drawing tools (stylus vs. finger).

Main Results:

  • Principal components analysis showed experiments grouped by instruction set and subject.
  • Drawing with a stylus yielded more consistent results than using a finger.
  • A decision support system was developed to accurately identify potentially abnormal spirals.

Conclusions:

  • A robust digital implementation of the Archimedes spiral exam was successfully built and validated.
  • A sensitive and specific workflow was recommended based on data from healthy volunteers.
  • The digital tool offers a reliable method for assessing spiral drawing consistency.