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Forensic Science

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Displaying 276 - 300 of 525

Expected net gain data of low-template DNA analyses

May 30, 2016
Author(s)
Simone N. Gittelson, Carolyn R. Steffen, Michael D. Coble
Low-template DNA analyses are affected by stochastic effects which can produce a configuration of peaks in the electropherogram (EPG) that is different from the genotype of the DNA's donor. A probabilistic and decision-theoretic model can quantify the

Low-template DNA: A single DNA analysis or two replicates?

April 18, 2016
Author(s)
Simone N. Gittelson, Carolyn R. Steffen, Michael D. Coble
This study investigates the following two questions: (i) Should the DNA analyst concentrate the DNA extract into a single amplification or should he/she split it up to do two replicates? (ii) Given the electropherogram obtained from a first analysis, is it

Uranium Ion Yields from Monodisperse Uranium Oxide Particles

February 24, 2016
Author(s)
Nicholas E. Sharp, John D. Fassett, David S. Simons
Secondary ion mass spectrometry (SIMS) plays an important role in nuclear forensics through its ability to identify isotopic ratios of particles accurately and precisely from samples obtained by inspectors [1]. As the particle mass can be on the order of

Topography measurements and applications in ballistics and tool mark identifications

December 17, 2015
Author(s)
Theodore V. Vorburger, Jun-Feng Song, Nicholas D. Petraco
The application of surface topography measurement methods to the field of firearm and toolmark analysis is fairly new. The field has been boosted by the development of a number of competing optical methods which has improved the speed and accuracy of

NIJ Funding: Supporting Scientists, Supporting Innovation

December 1, 2015
Author(s)
John Butler
In this invited submission to the NIJ Journal, I reflect on the role that National Institute of Justice (NIJ) funding has played in my career in forensic science. Early experiences at the FBI Laboratory are discussed along with the benefits of

Sequence variation of 22 autosomal STR loci detected by next generation sequencing

December 1, 2015
Author(s)
Katherine Gettings, Kevin M. Kiesler, Seth A. Faith, Elizabeth Montano, Christine H. Baker, Brian A. Young, Richard A. Guerreri, Peter Vallone
Sequencing short tandem repeat (STR) loci allows for determination of repeat motif variations within the STR (or entire PCR amplicon) which cannot be ascertained by size-based PCR fragment analysis. Sanger sequencing has been used in research laboratories

Dimensional Review of Scales for Forensic Photography

November 25, 2015
Author(s)
Massimiliano Ferrucci, Theodore D. Doiron, Robert M. Thompson, John Jones, Adam J. Freeman, Janice A. Neiman
Scales for forensic photography provide a geometrical reference in the photographic documentation of a crime scene. A common scale used by investigators is a plastic, L-shaped ruler that allows for a dimensional reference in the photographic documentation

HOW OLD IS IT? - 241PU/AMNUCLEAR FORENSIC CHRONOLOGY REFERENCE MATERIALS

October 27, 2015
Author(s)
Ryan P. Fitzgerald, Kenneth G. Inn
One material attribute for nuclear forensics is material age. 241Pu is almost always present in uranium- and plutonium-based nuclear weapons, which pose the greatest threat to our security. The in-growth of 241Am due to the decay of 241Pu provides an

NIST Big Data Interoperability Framework: Volume 4, Security and Privacy

October 22, 2015
Author(s)
Wo L. Chang, Arnab Roy, Mark Underwood, NBD-PWG NIST Big Data Public Working Group
Big Data is a term used to describe the large amount of data in the networked, digitized, sensor-laden, information-driven world. While opportunities exist with Big Data, the data can overwhelm traditional technical approaches and the growth of data is

Poster:A Logic Based Network Forensics Model for Evidence Analysis

October 15, 2015
Author(s)
Anoop Singhal, Changwei Liu, Duminda Wijesekera
Modern-day attackers tend to use sophisticated multi-stage/multi-host attack techniques and anti-forensics tools to cover their attack traces. Due to the current limitations of intrusion detection and forensic analysis tools, reconstructing attack

Sequence-based Analysis of Stutter at STR Loci: Characterization and Utility

September 23, 2015
Author(s)
Rachel A. Aponte, Katherine Gettings, David L. Duewer, Michael D. Coble, Peter Vallone
The development of next generation sequencing (NGS) technologies creates the potential for changing the method by which the forensic science community genotypes short tandem repeat (STR) loci. While the capabilities of NGS are promising, moving from

Development of a Chemically Relevant Artificial Fingerprint Material

September 16, 2015
Author(s)
Edward Sisco, Jessica L. Staymates, Katherine Schilling, John Gillen
The development of a chemically relevant artificial fingerprint material as well as a preliminary method for fingerprint deposition is discussed herein. More specifically the improvement of an artificial sweat material, an artificial sebaceous material
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