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Related Concept Videos

Mesh Analysis01:20

Mesh Analysis

1.5K
Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
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Plastic Deformations01:19

Plastic Deformations

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plastic Deformations01:14

Plastic Deformations

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It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Muscles for Facial Expressions01:14

Muscles for Facial Expressions

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The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

520
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
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Related Experiment Video

Updated: Feb 2, 2026

Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
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A facial reconstruction method based on new mesh deformation techniques.

Maya de Buhan1, Chiara Nardoni2

  • 1Centre national de la recherche scientifique, Unité mixte de recherche 8145, Laboratoire de Mathématiques Appliquées de Paris Descartes, Université Paris Descartes, Sorbonne Paris Cité, Paris, France.

Forensic Sciences Research
|November 29, 2018
PubMed
Summary

This study introduces an automated numerical method for virtual facial reconstruction from dry skulls. The novel approach uses shape matching and an elastic 3D mask for accurate facial identification.

Keywords:
Forensic scienceelasticityfacial reconstructionfinite elementsshape matchingsoft tissue deformation

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Area of Science:

  • Forensic Science
  • Computer Graphics
  • Medical Imaging

Background:

  • Facial reconstruction from skeletal remains is crucial for subject identification in forensic investigations.
  • Existing methods often rely on limited anatomical landmarks, potentially reducing accuracy.

Purpose of the Study:

  • To develop and present a novel, automated numerical method for virtual facial reconstruction from dry skulls.
  • To enhance the accuracy and efficiency of facial identification using skeletal data.

Main Methods:

  • A new numerical method combining a skull/face database with an original shape matching technique.
  • Utilizing an elastic 3D mask deformed and adapted to the unknown skull surface.
  • Treating the skull as a whole surface for a dense skull/face relationship description.

Main Results:

  • The method successfully reconstructs virtual faces from dry skulls.
  • Demonstrated efficiency and accuracy through various presented results.
  • The approach is fully automated, streamlining the reconstruction process.

Conclusions:

  • The proposed numerical method offers an effective solution for automated facial reconstruction.
  • This technique holds significant potential for improving subject identification in forensic anthropology.
  • The dense surface-based approach provides a more comprehensive skull-face relationship model.