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Author: andrew slifka
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Displaying records 1 to 10 of 31 records.
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1. FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT
Published: 10/22/2013
Authors: Andrew J Slifka, Elizabeth S Drexler, Nicholas Nanninga, Yaakov Levy, Joseph David McColskey, Robert L Amaro
Abstract: Fatigue crack growth tests were conducted on two pipeline steel alloys, API 5L X52 and X100. Baseline tests were conducted in air, and those results were compared with tests conducted in pressurized hydrogen gas. All tests were run at (load ratio) R ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911967

2. Modeling the Fatigue Crack Growth of X100 Pipeline Steel in Gaseous Hydrogen
Published: 8/20/2013
Authors: Robert L Amaro, Neha N. Rustagi, Andrew J Slifka, Elizabeth S Drexler, Kip Findley
Abstract: Hydrogen is likely to play a key role (worldwide) in a future clean energy economy. Although pipeline transmission appears to be the most economical means to transport gaseous hydrogen, fundamental understanding of the deleterious effects of hydroge ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910899

3. A review of fatigue crack growth for pipeline steels exposed to hydrogen
Published: 11/30/2010
Authors: Nicholas Nanninga, Andrew J Slifka, Yaakov Levy, Calvin L. White
Abstract: Hydrogen pipeline systems offer an economical means of storing and transporting energy in the form of hydrogen gas. Pipelines can be used to transport hydrogen that has been generated at solar and wind farms to and from salt cavern storage locations ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903829

4. Electrochemical measurement of diffusion in photopolymerized polyethylene glycol (PEG) hydrogels
Published: 10/29/2010
Authors: Kavita M Jeerage, Stephanie M. LaNasa, Holly A. Hughes, Damian Sky Lauria, Stephanie J. Bryant, Andrew J Slifka
Abstract: Scanning electrochemical microscopy has been used to examine the molecular transport properties of photopolymerized poly(ethylene glycol) (PEG) hydrogels having different mesh sizes. Both the molecular weight (508 Da or 3000 Da) of the PEG diacrylate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50614

5. Multi-Scale Pore Morphology in Vapor-Deposited Yttria-Stabilized Zirconia Coatings
Published: 6/16/2010
Authors: Derek D. Hass, H. Zhao, Tabbetha A. Dobbins, Andrew John Allen, Andrew J Slifka, H. N.G. Wadley
Abstract: A high pressure, electron-beam directed-vapor deposition process has been used to deposit partially stabilized zirconia containing 7 % yttria by mass at deposition pressures of 7.5 Pa to 23 Pa. Anisotropic ultra-small-angle X-ray scattering (USAXS) w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903655

6. A Uniaxial bioMEMS device for imaging single cell response during quantitative force-displacement measurements
Published: 12/1/2008
Authors: David Serrell, Jera Law, Andrew J Slifka, Roop L Mahajan, Dudley S. Finch
Abstract: Mechanical forces play a key role in many cellular processes such as apoptosis and differentiation. A microfabricated device has been developed for imaging of a single, adherent cell while quantifying force under an applied strain. The device works i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50612

7. Stiffening of the Extrapulmonary Arteries in Chronic Hypoxic Pulmonary Hypertension
Published: 7/1/2008
Authors: Elizabeth S Drexler, J. E. Bischoff, Christopher N McCowan, Andrew J Slifka, Timothy P Quinn, Robin Shandas, Dunbar Ivy, K. R. Stenmark
Abstract: It is increasingly appreciated that changes in the compliance properties of large blood vessels are critical determinants of ventricular afterload and ultimately dysfunction. Little is known of the mechanical properties of large vessels in the settin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50522

8. Spatially and Temporally Resolved Thermal Imaging of Cyclically Heated Interconnects by Use of Scanning Thermal Microscopy
Published: 1/1/2008
Authors: Nicholas Barbosa, Andrew J Slifka
Abstract: A scanning thermal microscope (SThM) was used to investigate the spatial and temporal distribution of temperature in electrical interconnect structures designed for measuring the mechanical properties of thin films. Knowledge of the thermal behavior ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50398

9. Interaction of environmental conditions: Role in the reliability of active implantable devices
Published: 6/7/2007
Authors: Elizabeth S Drexler, Andrew J Slifka, Nicholas Barbosa, John W. Drexler
Abstract: Present techniques for assessing the reliability of active implantable medical devices (AIMDs) rely on testing one or two environmental conditions at a time. But the interaction of these environmental conditions may have a greater impact on reliabili ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50532

10. Electrochemical measurements of diffusion through cardiac muscle tissue engineering scaffolds
Published: 5/18/2007
Authors: Kavita M Jeerage, Stephanie M. LaNasa, Damian Sky Lauria, Stephanie J. Bryant, Andrew J Slifka
Abstract: Cardiomyocytes, the beating cells of the heart, are highly dependent on oxygen for survival and function. Early work in cardiac muscle tissue engineering revealed that cardiomyocytes only survived within 150 microns of the scaffold's edge due to limi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50548



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