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Search Publications by: Steven Lund (Fed)

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Displaying 1 - 24 of 24

Quantitative Evaluation of Footwear Evidence: Initial Workflow for an End-to-End System

November 23, 2021
Author(s)
Gautham Venkatasubramanian, Vighnesh Hegde, Steven Lund, Hariharan K. Iyer, Martin Herman
In the U.S., footwear examiners make decisions about the sources of crime scene shoe impressions using subjective criteria. This has raised questions about the accuracy, repeatability, reproducibility, and scientific validity of footwear examinations

Accurate and Robust Trypan Blue-Based Cell Viability Measurement Using Neural Networks

July 19, 2021
Author(s)
Adele Peskin, Steven Lund, Chenyi Ling, Laura Pierce, Sumona Sarkar, Firdavs Kurbanov, Michael Halter, Joe Chalfoun, John T. Elliott
Trypan blue dye exclusion-based cell viability measurements are highly dependent upon image quality and consistency. In order to make measurements repeatable, one must be able to reliably capture images at a consistent focal plane, and with signal-to-noise

Examining Recent HR Data for Gender Bias Among Federal Employees at NIST

March 26, 2021
Author(s)
Jasmine Evans, Amanda Koepke, Steven Lund, Mary Frances Theofanos
This report is part of a multi-phase mixed methods project that is designed to provide an in-depth look at the population of National Institute of Standards and Technology (NIST) federal employees to identify factors, attitudes, and processes that might

The Roles of Standard Cigarettes in Assuring the Ignition Resistance of Soft Furnishings

November 18, 2020
Author(s)
Richard G. Gann, Ickchan Kim, Steven P. Lund, William F. Guthrie, Rick D. Davis
Regulations for cigarette ignition resistance (CIR) of soft furnishings (beds and upholstered furniture) and less fire-prone cigarettes have contributed substantially to the decrease in losses from cigarette-initiated fires over time. Two Standard

Interlaboratory study to validate a STR profiling method for intraspecies identification of mouse cell lines

June 20, 2019
Author(s)
Jamie L. Almeida, Aleksandra Dakic, Karin Kindig, Maikan Kone, Deborah L. Letham, Scott Langdon, Ruth Peat, Jayamalini Holding-Pillai, Erin Hall, Mark Ladd, Megan Shaffer, Heath Berg, Jinliang Li, Georges Wigger, Steven P. Lund, Carolyn R. Steffen, Barbara Fransway, Bob Geraghty, Manuela Natoli, Beth Bauer, Susanne M. Gollin, Dale Lewis, Yvonne A. Reid
The Consortium for Mouse Cell Line Authentication was formed to validate Short Tandem Repeat (STR) markers for intraspecies identification of mouse cell lines. The STR profiling method is a multiplex polymerase chain reaction (PCR) assay comprised of

Development and Interlaboratory Evaluation of a NIST Reference Material RM 8366 for EGFR and MET Gene Copy Number Measurements

May 21, 2019
Author(s)
Hua-Jun He, Biswajit Das, Megan H. Cleveland, Chen Li, Corinne Camalier, Liang-Chu Liu, Kara L. Norman, Andrew Fellowes, Christopher McEvoy, Steven P. Lund, Jamie L. Almeida, Carolyn R. Steffen, Chris Karlovich, P. M. Williams, Kenneth D. Cole
The National Institute Standard and Technology (NIST) Reference Material RM 8366 was developed to improve the quality of gene copy measurements of EGFR (epidermal growth factor receptor) and MET (proto-oncogene, receptor tyrosine kinase), important targets

Counting Caenorhabditis elegans: Protocol Optimization and Applications for Population Growth and Toxicity Studies in Liquid Medium

January 17, 2018
Author(s)
Steven Lund, Sanem Hosbas Coskun, Monique Johnson, Christopher Sims, Elijah Petersen, John T. Elliott, Bryant C. Nelson, Leona D. Scanlan, Shannon K. Hanna, Karina Brignoni, Patricia Lapasett
The nematode Caenorhabditis elegans is used extensively in molecular, toxicological and genetics research. However, standardized methods for counting nematodes in liquid culture do not exist despite the wide use of nematodes and need for accurate

Likelihood Ratio as Weight of Forensic Evidence: A Closer Look

October 12, 2017
Author(s)
Hariharan K. Iyer, Steven P. Lund
The forensic science community has increasingly sought quantitative methods for conveying the weight of evidence. Experts from many forensic laboratories summarize their fndings in terms of a likelihood ratio. Several proponents of this approach have

Certified DNA Reference Materials to Compare HER2 Gene Amplification Measurements Using Next- Generation Sequencing Methods

September 1, 2016
Author(s)
Chih-Jian Lih, Robin D. Harrington, Kneshay Harper, David J. Sims, Paul McGregor, Corinne Camalier, Han Si, Biswajit Das, P. M. Williams, Hua-Jun He, Jamie L. Almeida, Steven Lund, Steven J. Choquette, Kenneth D. Cole
The National Institute of Standards and Technology (NIST) Standard Reference Materials 2373 is a set of genomic DNA samples prepared from five breast cancer cell lines with certified values for the ratio of the HER2 gene copy number to the copy numbers of

Methodology for Increasing Image Feature Measurement Accuracy

June 30, 2016
Author(s)
Michael Paul Majurski, Joe Chalfoun, Steven Lund, Peter Bajcsy, Mary C. Brady
Motivation Image features are computed in cell biology to derive quantitative information regarding cell state, differentiation, biological activity, and cell dynamics. The accuracy of any biological conclusions depends on the accuracy of the measured

Evaluation of microbial qPCR workflows using engineered Saccharomyces cerevisiae

January 24, 2016
Author(s)
Sandra M. Da Silva, Lindsay Harris, Nathanael David Olson, Steven Lund, Autumn S. Downey, Zvi Kelman, Marc L. Salit, Jayne D. Morrow
Aims: We describe the development and interlaboratory study of modified Saccharomyces cerevisiae as a candidate material to evaluate a full detection workflow including DNA extraction and quantitative polymerase chain reaction (qPCR). Methods and results

Evaluation of two mitochondrial DNA biomarkers for prostate cancer detection

August 17, 2015
Author(s)
Samantha D. Maragh, Steven P. Lund
BACKGROUND: A 3.4kb deletion (3.4kbΔ) in mitochondrial DNA (mtDNA) found in histologically normal prostate biopsy specimens has been reported to be a biomarker for the increased probability of prostate cancer. Increased mtDNA copy number is also reported

Best Practices for Evaluating Single Nucleotide Variant Calling Methods for Microbial Genomics

July 7, 2015
Author(s)
Nathanael D. Olson, Steven P. Lund, Rebecca Colman, Jeffery T. Foster, Jason W. Sahl, James M. Schupp, Paul Keim, Jayne B. Morrow, Marc L. Salit, Justin M. Zook
Innovations in sequencing technologies have allowed biologists to make incredible advances in understanding biological systems. As experience grows, researchers increasingly recognize that analyzing the wealth of data provided by these new sequencing

International Interlaboratory Study Comparing Single Organism 16S rRNA Sequencing Data: Going Beyond Consensus Sequence Comparisons

March 5, 2015
Author(s)
Nathanael D. Olson, Justin M. Zook, Steven P. Lund, Fabiola Rojas-Cornejo, Jim Huggett, Jayne B. Morrow
The Consultative Committee for Amount of Substance established a working group to advance the metrology of microbial identification and quantification. This study represents the initial step towards international comparability and measurement assurance for

Nonparametric Estimates of Drift and Diffusion Profiles via Fokker-Planck Algebra

October 13, 2014
Author(s)
Steven P. Lund, Michael W. Halter, Joseph B. Hubbard
Diffusion processes superimposed upon deterministic motion play a key role in understanding and controlling the transport of matter, energy, momentum, and even information in physics, chemistry, material science, biology, and communications technology

Assessing technical performance in differential gene expression experiments with external spike- in RNA control ratio mixtures

September 25, 2014
Author(s)
Sarah A. Munro, Steven P. Lund, Patrick S. Pine, Hans Binder, Djork-Arne Clevert, Ana Conesa, Joaquin Dopazo, Mario Fasold, Sepp Hochreiter, Huixao Hong, Nederah Jafari, David P. Kreil, Pawel P. Labaj, Yang Liao, Simon Lin, Christopher E. Mason, Javier Santoyo, Steven J. Schrodi, Leming Shi, Wei Shi, Gordon K. Smyth, Nancy Stralis-Pavese, Zhenqiang Su, Charles Wang, Jian Wang, Joshua Xu, Zhan Ye, Yong Yang, Ying Yu, Paul Zumbo, Marc L. Salit
There is a critical need for standard approaches to assess, report and compare the technical performance of genome-scale differential gene expression experiments. Here we assess technical performance with a proposed standard ‘dashboard’ of metrics derived

Automated Ranking of Stem Cell Colonies by Translating Biological Rules to Computational Models

September 20, 2014
Author(s)
Adele P. Peskin, Steven P. Lund, YaShian Li-Baboud, Michael W. Halter, Anne L. Plant, Peter Bajcsy
This paper addresses the problem of automating an image ranking process for stem cell colonies. We automate the manual process in a novel way: instead of fitting off-the-shelf image features and colony ranks to prediction models, we define a new feature

Boltzmann's H-Function and Diffusion Processes

May 15, 2013
Author(s)
Steven P. Lund, Joseph B. Hubbard, Michael W. Halter
There exists a generalization of Boltzmann's $H$-function that allows for non-uniformly populated stationary states which may exist far from thermodynamic equilibrium. Here we describe a method for obtaining a generalized or collective diffusion