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Displaying 21951 - 21975 of 74214

Controlled Chemistry for Studying Combined Effects of Extracellular Matrix Proteins

April 22, 2013
Author(s)
Antony K. Chen, Frank W. DelRio, Alexander W. Peterson, Koo-Hyun Chung, Kiran Bhadriraju, Anne L. Plant
The extracellular matrix (ECM) consists of a complex mixture of biochemical and physical stimuli that together regulate cell behavior. Previously we showed that films composed of Type I collagen fibrils induce reproducible and physiologically relevant cell

Development of a Reference Material for the Calibration of Cement Paste Rheometers

April 22, 2013
Author(s)
Chiara F. Ferraris, Paul E. Stutzman, Zhuguo Li, Min-Hong Zhang
Rheometers are usually calibrated using a standard reference oil. On the other hand the calibration of rheometer for paste or concrete cannot be calibrated using an oil as it is a Newtonian fluid, while the rheometers are designed to measure non-Newtonian

Disassembly Process Information Model for Remanufacturing

April 22, 2013
Author(s)
Shaw C. Feng, Hanmin Lee, Thomas R. Kramer, Che B. Joung, Parisa Ghodous, Ram D. Sriram
The disassembly process is an essential activity performed on out-of-service products for remanufacturing. A disassembly process includes many subprocesses, such as separation, cleaning, repair, replacement, and inspection. The main purpose of performing

Engineering Change Management Concepts for Systems Modeling

April 22, 2013
Author(s)
Conrad E. Bock, Allison Barnard Feeney
A significant cost of manufactured systems arises in changing system specifications after they have been built and delivered to customers. This might be due to errors in the original specifications, feedback from customers, competition from other producers

Greenhouse Gas Emissions and Dispersion 1. Optimum placement of gas inlets on a building rooftop for the measurement of greenhouse gas concentrations

April 22, 2013
Author(s)
Kuldeep R. Prasad, Anthony Bova, James R. Whetstone, Elena Novakovskaia
Inverse atmospheric dispersion models are used to provide measurement-based, or “topdown”, estimates of greenhouse gas (GHG) emissions for comparison with input-based, or “bottom-up”, estimates. To minimize uncertainty, inverse estimates require accurate

Report on the Metrics and Standards for Software Testing (MaSST) Workshop 2012

April 22, 2013
Author(s)
Paul E. Black, Elizabeth N. Fong
The NIST Software Assurance Metrics And Tool Evaluation (SAMATE) project conducted a workshop on Metrics and Standards for Software Testing (MaSST) on June 20, 2012. This workshop was co-located with the IEEE Sixth International Conference on Software

Toward an Integrated Decision Support Framework for Sustainability CAE

April 22, 2013
Author(s)
Lalit Patil, Lakshmi Srinivas, Krishna Murthy, Debasish Dutta, Sudarsan Rachuri
Sustainability evaluation is typically conducted after the product is completely designed. However, sustainability, like cost and weight, needs to be managed on a continuous basis, throughout the product development cycle. This requires a decision support

VASIR: An Open-Source Research Platform for Advanced Iris Recognition Technologies

April 22, 2013
Author(s)
Yooyoung Lee, Ross J. Micheals, James J. Filliben, P J. Phillips
The performance of iris recognition systems is frequently affected by input image quality, which in turn is vulnerable to less-than-optimal conditions due to illuminations, environments, and subject characteristics (e.g., distance, movement, face/body

Demonstration of Achromatic Cold-Neutron Microscope Utilizing Axisymmetric Focusing Mirrors.

April 21, 2013
Author(s)
Daniel S. Hussey, D. Liu, M. V. Gubarev, D Ramsey, David L. Jacobson, Muhammad D. Arif, D. E. Moncton, B. Khaykovich
An achromatic cold-neutron microscope with magnification 4 is demonstrated. The image-forming optics is made of nested coaxial mirrors of full figures of revolution, so-called Wolter optics. The spatial resolution, field of view, and depth of focus are

The SIM time scale

April 20, 2013
Author(s)
Michael A. Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, E. de Carlos-Lopez
Time measurement is of great importance for science, technology and commerce. Among the seven base units of the International System (SI), the second can be realized with the smallest uncertainty, currently reaching parts in 10 16. Keeping track of the

Universal Proteolysis and MSn for N- and O- Glycan Branching Analysis

April 20, 2013
Author(s)
John E. Schiel, Karen W. Phinney, Nicholas J. Smith
The continually growing list of critical glycosylation-related processes has made analytical methodology for detailed glycan characterization an area of increasing interest. Glycosylation is a post translational modification of unsurpassed complexity due

Effect of Surface Chemistry on Stem Cell Response in 2-D vs. 3-D Cell Culture Niches

April 19, 2013
Author(s)
Sumona Sarkar, Carl G. Simon Jr., Roberta I. Lock, Joy P. Dunkers
To develop tissue engineered devices for regenerative medicine strategies, key scaffold properties for directing stem cell response must be identified. As focus shifts from 2-D to 3-D culture systems in an attempt to better recapitulate the natural

Sustainability through Lifecycle Synthesis of Material Information

April 19, 2013
Author(s)
Paul W. Witherell, Katherine C. Morris, Anantha Narayanan Narayanan, Jae H. Lee, Sudarsan Rachuri
The synthesis of material information across lifecycle stages will lay the foundation for a material information model to support sustainable decision making. This paper explores how material information is represented in select standards that address

A Sensor Ontology Literature Review

April 18, 2013
Author(s)
Roger D. Eastman, Craig I. Schlenoff, Stephen B. Balakirsky, Tsai H. Hong
The purpose of this paper is to review existing sensor and sensor network ontologies to understand whether they can be reused as a basis for a manufacturing sensor ontology, or if the existing ontologies hold lessons for the development of a new ontology

Assessing Ranging Errors as a Function of Azimuth in Laser Trackers and Tracers

April 18, 2013
Author(s)
Balasubramanian Muralikrishnan, Vincent D. Lee, Christopher J. Blackburn, Daniel S. Sawyer, Steven D. Phillips, Wei Ren, Ben Hughes
Tilt and radial error motion of a laser tracker head as it spins about the two axes results in small but measurable ranging and angle errors. The laser tracer, on the other hand, measures range with respect to the center of a high quality stationary sphere
Displaying 21951 - 21975 of 74214
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