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

Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

819
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
819

You might also read

Related Articles

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

Sort by
Same author

3D printed object topography analysis and the viability for forensic examination.

Journal of forensic sciences·2026
Same author

Quantitative assessment of barrel wear from solid copper bullets.

Journal of forensic sciences·2025
Same author

Evaluating firearm examiner conclusion variability using cartridge case reproductions.

Journal of forensic sciences·2021
Same author

Three-Dimensional Analysis of Cartridge Case Double-Casts.

Journal of forensic sciences·2020
Same author

Determining the number of test fires needed to represent the variability present within firearms of various calibers.

Forensic science international·2018
Same author

An evaluation of the discriminating power of an Integrated Ballistics Identification System<sup>®</sup> Heritage™system with the NIST standard cartridge case (Standard Reference Material 2461).

Forensic science international·2017

Related Experiment Video

Updated: May 1, 2026

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
07:57

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

13.3K

Performance evaluation of a Cadre Forensics TopMatch-GS 3D system for cartridge case comparisons.

Joseph W Alsdurf1, Eric F Law1, Stephanie C Luehr2

  • 1Forensic Science Institute, University of Central Oklahoma, Edmond, Oklahoma, USA.

Journal of Forensic Sciences
|December 13, 2024
PubMed
Summary

This study evaluated Cadre

Keywords:
3D scanningammunition variabilityautomated comparisonscadre forensics TopMatch‐GScartridge case comparisonsfirearm forensics

More Related Videos

Design of an Open-Source, Low-Cost Bioink and Food Melt Extrusion 3D Printer
08:01

Design of an Open-Source, Low-Cost Bioink and Food Melt Extrusion 3D Printer

Published on: March 2, 2020

9.8K
Automated Rat Single-Pellet Reaching with 3-Dimensional Reconstruction of Paw and Digit Trajectories
07:52

Automated Rat Single-Pellet Reaching with 3-Dimensional Reconstruction of Paw and Digit Trajectories

Published on: July 10, 2019

14.1K

Related Experiment Videos

Last Updated: May 1, 2026

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
07:57

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

13.3K
Design of an Open-Source, Low-Cost Bioink and Food Melt Extrusion 3D Printer
08:01

Design of an Open-Source, Low-Cost Bioink and Food Melt Extrusion 3D Printer

Published on: March 2, 2020

9.8K
Automated Rat Single-Pellet Reaching with 3-Dimensional Reconstruction of Paw and Digit Trajectories
07:52

Automated Rat Single-Pellet Reaching with 3-Dimensional Reconstruction of Paw and Digit Trajectories

Published on: July 10, 2019

14.1K

Area of Science:

  • Forensic Science
  • Firearm Examination
  • Ballistics

Background:

  • Three-dimensional (3D) measurement systems and comparison algorithms are increasingly used in firearm forensics.
  • Algorithm performance can be affected by ammunition brand variability, necessitating testing across diverse brands.
  • Reproducibility of firearm features varies with ammunition type, impacting comparison accuracy.

Purpose of the Study:

  • To assess the performance of Cadre's breech face and firing pin aperture shear algorithms.
  • To evaluate algorithm accuracy when comparing cartridge cases from the same versus different ammunition brands.
  • To quantify algorithm performance using receiver operating characteristic (ROC) curves and area under the curve (AUC).

Main Methods:

  • Fired 300 cartridge cases from 10 firearms using six ammunition brands.
  • Scanned cases using a Cadre Forensics TopMatch-GS 3D system.
  • Conducted 44,850 comparisons using Cadre's algorithms, analyzing within- and between-brand performance.

Main Results:

  • Same ammunition brand comparisons yielded higher accuracy (AUC = 0.964) than different brands (AUC = 0.944).
  • Cadre's algorithms showed excellent discrimination (AUC = 0.946) between same and different sources, irrespective of ammunition brand.
  • A similarity score threshold of 0.5 correctly identified 68.6% of same-source comparisons.

Conclusions:

  • Firearm characteristic reproducibility is generally higher with same-brand ammunition.
  • Cadre's algorithms demonstrate robust performance in distinguishing between same and different-source cartridge cases.
  • Established score thresholds can aid practitioners in interpreting algorithm results for casework.