Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Conferences

Service Life Modeling of Reinforced High Volume Fly ash (HVFA) Concrete Structures Containing Cracks

May 1, 2015

Author(s)

Scott Z. Jones, Dale P. Bentz, Kenneth A. Snyder, Nicos Martys, Daniel S. Hussey, David L. Jacobson

Chloride ions, resulting from the application of de-icing salts travel through the concrete matrix by diffusion in a connected pore network. Cracks in concrete...

A Compact Millimeter-wave Multisine Generator for Calibrating Broadband Vector Receivers

April 30, 2015

Author(s)

Paul D. Hale, Kate Remley, Dylan Williams, Jeffrey Jargon, Chih-Ming Wang

We propose a compact and low cost waveform source that can be used to calibrate the magnitude and phase response of vector receivers over a bandwidth as large...

Progress Toward Standardized Additive Manufacturing Test Artifacts

April 29, 2015

Author(s)

Shawn P. Moylan

Users and buyers of additive manufacturing (AM) systems need to know system performance characteristics to make important, basic decisions such as whether or...

Post-process machining of additive manufactured stainless steel

April 29, 2015

Author(s)

Brandon M. Lane, Shawn P. Moylan, Eric P. Whitenton

Due to the poorer surface finish and geometric accuracy of additive manufactured (AM) parts compared to machined parts, it is inevitable that parts fabricated...

Certified KLST Miniaturized Charpy Specimens for the Indirect Verification of Small-Scale Impact Machines

April 28, 2015

Author(s)

Enrico Lucon, Christopher N. McCowan, Raymond L. Santoyo, Jolene D. Splett

Small specimen test techniques are becoming ever more popular as the need increases to characterize mechanical properties by use of the smallest possible amount...

Fast Minimization of Region-based Active Contours using the Shape Hessian of the Energy

April 28, 2015

Author(s)

Gunay Dogan

We propose a novel shape optimization algorithm for region-based active contour models. Region-based active contours are preferred for many segmentation...

Performance Measurement of Mobile Manipulators

April 24, 2015

Author(s)

Roger V. Bostelman, Tsai Hong Hong, Jeremy A. Marvel

This paper describes a concept for measuring the reproducible performance of mobile manipulators to be used for assembly or other similar tasks. An AGV with an...

Measuring collected gas with microwave and acoustic resonances

April 23, 2015

Author(s)

Keith A. Gillis, James W. Schmidt, Michael R. Moldover, James B. Mehl

With calibrations of large flow meters in mind, we established the feasibility of determining the mass M of argon gas contained within a 0.3 m 3 commercially...

Analysis of a Half-Scale Composite Floor System Test under Column Loss Scenarios

April 23, 2015

Author(s)

Joseph A. Main, Jonathan M. Weigand, Eric S. Johnson, Tim Francicso, Judy Liu, Jeffrey W. Berman, Larry A. Fahnestock

This paper describes modeling and analysis of a half-scale steel gravity frame system with composite concrete slab on steel deck that was constructed and tested...

New Steel Gravity Connection Details for Enhanced Integrity

April 23, 2015

Author(s)

Jonathan M. Weigand, Jeffrey W. Berman

Recent large-scale tests have found that Steel Gravity Framing Systems (SGFSs) with conventional connections were inadequate to support the integrity gravity...

Assessment of First Generation Performance-based Seismic Design Methods: Case Study on a 4-story Reinforced Concrete Special Moment Frame

April 23, 2015

Author(s)

Siamak Sattar, Anne M. Hulsey

The anticipated performance of a 4-story reinforced concrete (RC) building designed in accordance with ASCE/SEI 7, is assessed using ASCE/SEI 41. Engineering...

ASCE/SEI 7 Appendix E Proposal: Performance-Based Design Procedures for Fire Effects on Structures

April 22, 2015

Author(s)

Therese P. McAllister, Kevin La Malva, Maria Garlock

The ASCE/SEI Technical Committee on Fire Protection was formed in 2012 to support professional structural engineers conducting performance-based design of...

Community Resilience of the Built Environment

April 22, 2015

Author(s)

Therese P. McAllister

Buildings, facilities, and infrastructure systems play a key role in the life of a community by supporting housing, business, government, industry, and other...

Overview of the TREC 2014 Clinical Decision Support Track

April 22, 2015

Author(s)

Ellen M. Voorhees

The Text REtrieval Conference (TREC) Clinical Decision Support Track fosters research on systems that link electronic health records with information that is...

A Fast and Self-Consistent Approach for Multi-Cycle Equilibrium Core Studies using Monte Carlo Models

April 19, 2015

Author(s)

Zeyun NMN Wu, Robert E. Williams

A fast and self-consistent approach, PRELIM approach, is described in this paper with the aim of quickly delivering a multi-cycle equilibrium configuration...

Equivalence Class Verification and Oracle-Free Testing Using Two-layer Covering Arrays

April 17, 2015

Author(s)

David R. Kuhn, Raghu N. Kacker, Yu Lei, Jose Torres-Jimenez

This short paper introduces a method for verifying equivalence classes for module/unit testing. This is achieved using a two-layer covering array, in which some...

Real Gas Corrections for High Beta Ratio Critical Flow Venturi (CFV) Installations.

April 17, 2015

Author(s)

Aaron N. Johnson, Eric W. Lemmon

For almost 50 years flow measurement applications using critical flow venturis (CFVs) have relied exclusively on the critical flow function (C*) to correct for...

Design and Capabilities of NISTs Scale-Model Smokestack Simulator (SMSS)

April 17, 2015

Author(s)

Aaron N. Johnson, Joey T. Boyd, Eric Harman, Mohammad M. Khalil, Jacob E. Ricker, Christopher J. Crowley, Rodney A. Bryant, Iosif I. Shinder

The amount of CO 2 emitted from a coal-fired power plant (CFPP) is measured by continuous emissions monitoring systems (CEMS) permanently installed in the...

Micro-Flow Calibration Facility at NIST

April 15, 2015

Author(s)

James W. Schmidt, John D. Wright

The Fluid Metrology Group (FMG) at NIST is developing a primary, dynamic gravimetric liquid flow standard for use in the range 1 mL/min to 100 nL/min (and...

Forming limit diagram predictions using a self-consistent crystal plasticity model: a parametric study

April 15, 2015

Author(s)

Youngung Jeong, Minh-Son Pham, Mark A. Iadicola, Adam A. Creuziger

A numerical model to predict forming limit diagram (FLD) for polycrystalline metal sheets is presented. In it, the Marciniak-Kuczynski (MK) approach is...

The Effect of Liquid Kinematic Viscosity and Drain Time on the Volume Delivered from a Test Measure

April 14, 2015

Author(s)

John D. Wright, Sherry D. Sheckels, Lachance Christian, Farhad Sharifi, Dominic Ondoro

Volume test measures are used for calibration and traceability of petroleum measurements and their low uncertainty is important for the equitable trade of...

Thermal Effects on Critical Flow Venturis

April 14, 2015

Author(s)

John D. Wright, Aaron N. Johnson, Michael R. Moldover, Woong Kang, Liang Zhang

Critical flow venturis (CFVs) are widely used as working and transfer standards for gas flow measurement because of their long-term calibration stability (5 (e...

Scatterfield Microscopy and the Fundamental Limits of Optical Defect Metrology

April 14, 2015

Author(s)

Richard M. Silver, Bryan M. Barnes, Martin Y. Sohn, Hui Zhou

Defect inspection remains a critical manufacturing challenge due to the competing requirements between throughput and very high resolution. Currently only...

Privacy Amplification in the Isolated Qubits Model

April 14, 2015

Author(s)

Yi-Kai Liu

Isolated qubits are a special class of quantum devices, which can be used to implement tamper-resistant cryptographic hardware such as one-time memories (OTM's)...

Frontiers of Characterization and Metrology for Nanoelectronics: 2015

April 14, 2015

Author(s)

Erik M. Secula, David G. Seiler

NISTs New 3D Airspeed Calibration Rig, Addresses Turbulent Flow Measurement Challenges

April 14, 2015

Author(s)

Iosif I. Shinder, Vladimir Khromchenko, Michael R. Moldover

Outdoor air flows and flue-gas flows in large conduits and large stacks have significant swirl and turbulence. Accurate measurements of such complex flows are...

Pass / Fail / Inconclusive Criteria for Inter-Laboratory Comparisons

April 14, 2015

Author(s)

Blaza Toman, Bodo Mickan, Gerd Wubbeler, Olha Bodnar, Clemens Elster, John D. Wright

Inter-laboratory comparisons use the best available transfer standards to check participants uncertainty analyses, identify underestimated uncertainty claims or...

A New Modem for Two Way Satellite Time and Frequency Transfer

April 13, 2015

Author(s)

Shengkang Zhang, Xueyun Wang, Haifeng Wang, Hongbo Wang, Yuan Yuan, Keming Feng

Two Way Satellite Time Frequency Transfer (TWSTFT) is a highly precise time & frequency remote comparison technique, which is widely used in time metrology...

Bias Corrections in Primary Frequency Standards

April 13, 2015

Author(s)

Thomas E. Parker, Thomas P. Heavner, Steven R. Jefferts

Primary frequency standards serve the function of calibrating the rate of International Atomic Time, TAI, and therefore play a critical role in the accuracy of...

Traceability for Microwave Power Measurements: Past, Present, and Future

April 13, 2015

Author(s)

Ronald A. Ginley

The need for traceable microwave power measurements for use in communications, defense, spectral line investigation, molecular particle signature identification...

Was this page helpful?