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Topic Area: Environment/Climate
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Displaying records 21 to 30 of 443 records.
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21. Additive Manufacturing: Overview and NDE Challenges
Topic: Environment/Climate
Published: 7/26/2013
Author: John A Slotwinski
Abstract: Additive manufacturing (AM) processes are capable of producing highly complex and customized parts, without the need for dedicated tooling, and can produce parts directly from the part design information. These types of processes are poised to revolu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914545

22. Infrared Thermography for Laser-Based Powder Bed Fusion Additive Manufacturing Processes
Topic: Environment/Climate
Published: 7/26/2013
Authors: Shawn P Moylan, Eric Paul Whitenton, Brandon M Lane, John A Slotwinski
Abstract: Additive manufacturing (AM) has the potential to revolutionize discrete part manufacturing, but improvements in processing of metallic materials are necessary before AM will see widespread adoption. A better understanding of AM processes, resulting ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914588

23. Porosity of Additive Manufacturing Parts for Process Monitoring
Topic: Environment/Climate
Published: 7/26/2013
Authors: John A Slotwinski, Edward Joseph Garboczi
Abstract: Some metal additive manufacturing processes can produce parts with internal porosity, either intentionally (with careful selection of the process parameters) or unintentionally (if the process is not well understood.) Material porosity is undesirable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914546

24. Multi-resonant plasmonic nanodome arrays for label-free biosensing applications
Topic: Environment/Climate
Published: 7/10/2013
Authors: Charles J. Choi, Stephen Semancik
Abstract: The characteristics and utility of plasmonic nanodome arrays capable of supporting multiple resonance modes are described. A low-cost, large-area replica molding process is used to produce, on flexible plastic substrates, two-dimensional periodic arr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913024

25. Metrology for Additive Manufacturing - Opportunities in a Rapidly Emerging Technology
Topic: Environment/Climate
Published: 7/1/2013
Authors: John A Slotwinski, Thomas A. Campbell
Abstract: Additive Manufacturing (AM) is a group of emerging technologies that create objects from the bottom-up by adding material one cross-sectional layer at a time. The AM process begins with a three-dimensional model of the object, usually created by comp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912499

26. Lessons Learned in Establishing the NIST Metal Additive Manufacturing Laboratory
Series: Technical Note (NIST TN)
Report Number: 1801
Topic: Environment/Climate
Published: 6/21/2013
Authors: Shawn P Moylan, John A Slotwinski, April Cooke, Kevin K Jurrens, M Alkan Donmez
Abstract: This publication presents a summary of lessons learned by NIST staff during establishment of the NIST Metal Additive Manufacturing Laboratory and implementation of the metal additive manufacturing capability at NIST. These lessons learned result ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913441

27. Fabricating HD-2(Fe) type Gas Proportional Counters: A Practical Guide to Techniques, Procedures and Operations
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7936
Topic: Environment/Climate
Published: 6/5/2013
Authors: George A Klouda, Jeffrey R. Anderson, John E Fuller III
Abstract: Over the last eight years, gas (filled) proportional counters (GPCs) of the HD-2(Fe) type (Davis et al., 1968, 1972; Wink et al., 1993) have been fabricated at NIST through a collaboration of the Materials Measurement Science Division, Facility f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912498

28. Results from the International Halocarbons in Air Comparison Experiment (IHALACE)
Topic: Environment/Climate
Published: 6/1/2013
Authors: Bradley Hall, George C Rhoderick, A Engel, J. Muhle, J. W. Elkins, F. Artuso, E. Atlas, M. Aydin, D. Blake, E. G. Brunke, S. Chiavarini, P. J. Fraser, J. Happell, P. B. Krummel, I. Levin, M. Loewenstein, M. Malone, S. A. Montzka, S. O'Doherty, S. Reimann, E. S. Saltzman, H. E. Scheel, L. P. Steele, M. K. Vollmer, R. F. Weiss, D. Worthy, Y. Yokouchi
Abstract: The International Halocarbons in Air Comparison Experiment (IHALACE) was conducted to document relationships between calibrations scales among various laboratories that measure atmospheric greenhouse and ozone depleting gases. Six stainless steel cyl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914533

29. All-angle negative refraction and active flat lensing of ultraviolet light
Topic: Environment/Climate
Published: 5/22/2013
Authors: Ting Xu, Amit Kumar Agrawal, Maxim Abashin, Kenneth John Chau, Henri J Lezec
Abstract: The ability of a left-handed medium to sustain backwards electromagnetic waves leads to counter-intuitive phenomena such as negative refraction. We report the experimental implementation of a three-dimensional negative-index metamaterial operating at ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911161

30. Investigation of NaY Zeolite with Adsorbed CO2 by Neutron Powder Diffraction
Topic: Environment/Climate
Published: 5/17/2013
Authors: Winnie K Wong-Ng, James A. Kaduk, Qingzhen Huang, Laura Espinal, Lan (Lan) Li, Jacob W Burress
Abstract: The crystal structure of dehydrated NaY zeolite (Na-FAU structure type) with and without adsorbed CO2 has been determined at 4K and at room temperature (RT) using neutron powder diffraction techniques. The CO2-containing sample was prepared at -78 °C ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912138



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