My research focuses on pattern recognition and forensic statistics, with an emphasis on firearm and toolmark evidence. I am particularly interested in developing statistically-sound and accessible algorithms to objectively compare forensic evidence.
Zemmels, J., VanderPlas, S., Hofmann, H. Automatic Matching of Cartridge Case Impressions, (in preparation, to be submitted to The Journal of Data Science, Statistics, and Visualizations).
Zemmels, J., VanderPlas, S., Hofmann, H. Diagnostic Tools for Cartridge Case Comparison Algorithms, (in preparation, to be submitted to The Journal of Computational and Graphical Statistics).
Zemmels, J., VanderPlas, S., & Hofmann, H. (2023). A Study in Reproducibility: The Congruent Matching Cells Algorithm and cmcR Package. In The R Journal (Vol. 14, Issue 4, pp. 79–102). The R Foundation. https://doi.org/10.32614/rj-2023-014
Zemmels, J., VanderPlas, S., Hofmann, H. (2023). Visual Diagnostics for Cartridge Case Impression Evidence, poster presentation at the American Academy of Forensic Science (AAFS) 75th Annual Meeting, Orlando, FL, February 13-17. (poster accessible with free account sign-up)
Zemmels, J., VanderPlas, S., Hofmann, H. (2022). A Cartridge Case Comparison Pipeline, poster presentation at the International Association for Identification (IAI) 106th Annual Meeting, Omaha, NE, August 1-5.
Tai, X., Eddy, W., Zemmels, J. (2019). Developing Methods for Cartridge Breechface Images, poster presentation at the CSAFE All-Hands meeting, Ames, IA, May 20-22.
Zemmels, J., Hofmann, H. (2023) Visual Diagnostics for Algorithmic Cartridge Case Comparisons, webinar presentation for the Center for Statistics and Applications in Forensic Evidence. March 29. (slides, github, recording accessible with free account sign-up)
Zemmels, J., Schoen, A., Mack, D., Johnson, Z., Seeger C., Hanson, B. (2021). DHR “Just the Facts” on Economic and Workforce Development, webinar presentation for the Data Science for the Public Good Symposium, August 6. (event link)
Zemmels, J., VanderPlas, S., Hofmann, H. (2020). cmcR: Open-Source Implementation of the Congruent Matching Cells Method, webinar presentation for Firearms and Toolmarks Workshop, November 31 - December 1. (slides)
cmcR:
An Implementation of the ‘Congruent Matching Cells’ Methodimpressions:
An R package for diagnosing cartridge case impression comparison
algorithms
scored: An R
package to compare cartridge cases and compute similarity scores based
on their breech face impressions.
cartridgeInvestigatR:
process and compare cartridge case scans