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Author: geraldine cheok
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Displaying records 11 to 20 of 80 records.
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11. Augmenting BIM with 3D Imaging Data to Control Drilling for Embeds into Reinforced Concrete Bridge Decks
Published: 5/22/2012
Authors: Manu Akula, Robert R Lipman, Marek Franaszek, Kamel Shawki Saidi, Geraldine S Cheok, Vineet Kamat
Abstract: Placing embeds into reinforced concrete structures, after concrete is poured, without damaging reinforcement bars (rebar) is an industry-wide challenge encountered across the construction industry. In concrete structures such as containment vessels, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910302

12. Phase III: Evaluation of an Acceptance Sampling Method for 2D/3D Building Plans (NISTIR 7659)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7659
Published: 1/1/2012
Authors: Geraldine S Cheok, Marek Franaszek
Abstract: The General Services Administration (GSA) established the National 3D-4D-BIM (Three dimensional- Four Dimensional Building Information Model) Program in 2003. A part of the program involves 3D imaging, and the National Institute of Standards Technol ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904619

13. Development and Use of the NIST Intelligent and Automated Construction Job Site Testbed
Series: Technical Note (NIST TN)
Report Number: 1726
Published: 12/16/2011
Authors: Kamel Shawki Saidi, Geraldine S Cheok, Marek Franaszek, Christopher U Brown, Jeremy Swerdlow, Robert R Lipman, Itai Katz, Mani Golparvar-Fard, Paul Goodrum, Manu Akula, Gabriel Dadi, Behshad Ghadimi
Abstract: The Intelligent and Automated Construction Job Site (IACJS) Testbed is a large laboratory facility that was established at the National Institute of Standards and Technology (NIST) in 2011. The creation of the testbed was motivated by the need for su ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909841

14. Characterization of the Range Performance of a 3D Imaging System (NIST TN 1695)
Series: Technical Note (NIST TN)
Report Number: 1695
Published: 5/9/2011
Authors: Geraldine S Cheok, Kamel Shawki Saidi, Marek Franaszek, James J Filliben, Nicholas Scott
Abstract: A 3D imaging instrument is a non-contact measurement instrument used to rapidly obtain 3D information about a scene or object. The use of and the applications for these instruments have grown tremendously in the last decade. The expanded use of 3D ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908198

15. 3D Imaging Systems for Manufacturing, Construction, and Mobility (NIST TN 1682)
Series: Technical Note (NIST TN)
Report Number: 1682
Published: 12/15/2010
Authors: Geraldine S Cheok, Maris Juberts, Marek Franaszek
Abstract: The National Defense Center of Excellence for Industrial Metrology and 3D Imaging (COE-IM3DI) is conducting research to enable the next generation of manufacturing-centric human/instrument/machine interaction. The generalized goal of the COE-IM3DI r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907367

16. Assessing Technology Gaps for the Federal Highway Administration Digital Highway Measurement Program (NISTIR 7685)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7685
Published: 4/1/2010
Authors: Geraldine S Cheok, Marek Franaszek, Itai Katz, Alan M. (Alan M.) Lytle, Kamel Shawki Saidi, Nicholas A. Scott
Abstract: The ability to automatically collect more and better measurements of roadway assets (e.g., existence, condition, location, type) and to accurately map both geometry and elements of roadway assets is an important mitigating factor in roadway safety. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905154

17. Proceedings of the GSA 3D Imaging Workshop, February 28, 2011 (NIST TN 1699)
Series: Technical Note (NIST TN)
Report Number: 1699
Published: 12/9/2009
Authors: Geraldine S Cheok, Marek Franaszek, Kamel Shawki Saidi
Abstract: The General Services Administration (GSA) has been involved in 3D imaging since the early 2000s. Since 3D imaging was a relatively new technology at that time, GSA needed to develop and provide initial guidance to their project managers (PMs) on 3D i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908607

18. Evaluation of an Acceptance Sampling Method for 2D/3D Building Plans Derived from 3D Imaging Data
Published: 12/1/2009
Authors: Geraldine S Cheok, Marek Franaszek, James J Filliben
Abstract: An acceptance sampling method, based on obtaining physical measurements, for accepting 2D building plans generated from 3D imaging data is evaluated and demonstrated using an actual GSA (General Services Administration) facility. The objective of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907878

19. Fitting Spheres to Range Data from 3D Imaging Systems
Published: 10/1/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel Shawki Saidi, Christoph Johann Witzgall
Abstract: Two error functions used for nonlinear Least Squares (LS) fitting of spheres to range data from 3D imaging systems are discussed: orthogonal error function and directional error function. Both of the functions allow unrestricted gradient-based minimi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861541

20. Gauging the Repeatability of 3D Imaging Systems by Sphere Fitting
Published: 9/30/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel Shawki Saidi
Abstract: Multiple scans of the same object acquired with 3D imaging system (e.g., laser scanner) in the same experimental conditions could provide valuable information about the instrument s performance (e.g., stability, existence of bias, measurement error). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903444



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