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

Conservation of Momentum: Problem Solving01:30

Conservation of Momentum: Problem Solving

11.6K
Solving problems using the conservation of momentum requires four basic steps:
11.6K
Testing a Claim about Standard Deviation01:19

Testing a Claim about Standard Deviation

2.7K
A complete procedure to test a claim about population standard deviation or population variance is explained here.
The hypothesis testing for the claim of population standard deviation (or variance) requires the data and samples to be random and unbiased. The population distribution also must be normal. There is no specific requirement on the sample size as the estimation is based on the chi-square distribution.
As a first step, the hypothesis (null and alternative) concerning the claim about...
2.7K
Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

907
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
907
Impact: Problem Solving01:26

Impact: Problem Solving

381
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
381

You might also read

Related Articles

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

Sort by
Same author

Beretta barrel fired bullet validation study.

Journal of forensic sciences·2021
Same journal

GenoEye: A machine learning-based framework for the prediction of intermediate eye color phenotypes.

Journal of forensic sciences·2026
Same journal

Sharp force trauma analysis without animal bones: A proposal for sustainable and ethical bone proxies.

Journal of forensic sciences·2026
Same journal

Absolute dating of modern paper using <sup>14</sup>C bomb peak data of the paper fibers.

Journal of forensic sciences·2026
Same journal

Forensic timeline investigation of Apple Health app on iOS.

Journal of forensic sciences·2026
Same journal

Help v. harm: How a "lookup table" for evaluating DNA evidence given activity-level propositions could lead to wrongful convictions.

Journal of forensic sciences·2026
Same journal

Correction to "Development and Evaluation of an Iodoplatinate-Based Strip-Type Kit for On-Site Drug Screening in Beverages".

Journal of forensic sciences·2026
See all related articles

Related Experiment Video

Updated: Dec 3, 2025

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
10:52

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

8.8K

Beretta barrel fired bullet validation study.

Jaimie A Smith1

  • 1Prince George's County Police Department, Forensic Science Division, Firearms Examination Unit, Landover, MD, USA.

Journal of Forensic Sciences
|October 26, 2020
PubMed
Summary
This summary is machine-generated.

Firearm examiners demonstrated high accuracy in identifying firearm barrels, achieving a low error rate of 0.08% in an open-set study. This research addresses criticisms and aims to establish foundational validity in firearm identification.

Keywords:
BerettaPCASTbarrelscomparisonconsecutively manufacturederror ratefirearm identificationfired bulletsfoundational validitymicroscopic examinationvalidation study

More Related Videos

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
09:12

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation

Published on: June 28, 2015

8.8K
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
11:28

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials

Published on: May 18, 2015

12.8K

Related Experiment Videos

Last Updated: Dec 3, 2025

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
10:52

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

8.8K
A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
09:12

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation

Published on: June 28, 2015

8.8K
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
11:28

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials

Published on: May 18, 2015

12.8K

Area of Science:

  • Forensic Science
  • Ballistics
  • Firearm Examination

Background:

  • A 2016 report by the President's Council of Advisors on Science and Technology (PCAST) raised concerns regarding the scientific validity of firearm identification studies.
  • Previous studies faced criticism for their methodologies and conclusions, necessitating further research to address these issues.

Purpose of the Study:

  • To address criticisms outlined in the PCAST report concerning firearm identification.
  • To establish "Foundational Validity" in the discipline of firearm identification through a rigorous study design.
  • To assess the accuracy and error rates of qualified firearm examiners in identifying firearm barrels.

Main Methods:

  • The study utilized 30 consecutively manufactured Beretta 9mm Luger caliber barrels.
  • An "open set" design was employed, including 15 known samples, 20 unknown samples, and 5 "known non-match" comparisons.
  • Seventy-two qualified firearm examiners participated, submitting their analyses of the provided test sets.

Main Results:

  • Firearm examiners achieved a low overall error rate of 0.08% (1 in 1250) in identifying fired bullets.
  • Confidence intervals for the error rate were calculated, with a lower bound of 0.01% (1 in 10,000) and an upper bound of 0.4% (1 in 250).
  • The study demonstrated the capability of examiners to perform accurate firearm identification under challenging conditions.

Conclusions:

  • The findings suggest that firearm examiners can achieve a low error rate in identifying firearm barrels.
  • This study contributes to establishing the "Foundational Validity" of firearm identification, as recommended by the PCAST report.
  • The results support the reliability of firearm examination as a forensic discipline.