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Displaying 28676 - 28700 of 73697

Calculation of pulse parameters and propagation of uncertainty

March 1, 2009
Author(s)
Paul D. Hale, Chih-Ming Wang
The fundamental starting point for the analysis of all two-state waveforms is the determination of the low- and highstate levels. This is a two-step process. First, the data are grouped into points belonging to each state, and second, the value of each

Collisional Energy Dependence of Peptide Ion Fragmentation

March 1, 2009
Author(s)
Pedatsur Neta, Y Simon-Manso, Xiaoyu Yang, Stephen Stein
The energy dependence of fragmentation in a collision cell was measured for 2100 peptide ions derived from the digestion of twenty four common proteins. Most proteins were digested by trypsin and derived peptides were divided into several classes

Diffusion-controlled, self-organized growth of symmetric wrinkling patterns

March 1, 2009
Author(s)
Jun Y. Chung, Adam J. Nolte, Christopher Stafford
Nature is particularly adept at creating ordered patterns ranging from the wind-shaped ripples on a sand dune to spiral patterns found in sea shells or galaxies. Scientists have been striving to design systems with the same level of richness and complexity

High-performance, vibration-immune, fiber-laser frequency comb

March 1, 2009
Author(s)
Esther Baumann, Fabrizio R. Giorgetta, Jeffrey W. Nicholson, William C. Swann, Ian R. Coddington, Nathan R. Newbury
We demonstrate an environmentally robust optical frequency comb based on a polarization-maintaining, allfiber, figure-eight laser. The comb is phase locked to a cavity-stabilized cw laser by use of an intracavity electro-optic phase modulator yielding 1.6

On the Sub-Nanometer Resolution of Scanning Electron and Helium Ion Microscopes

March 1, 2009
Author(s)
Andras Vladar, Michael T. Postek, Bin Ming
All forms of microscopy are being pushed to the limit by nanotechnology. Hence, there is a relentless quest to achieve better and better resolution with various electron and ion microscopes and to monitor and maintain these instruments to achieve the best

Semiconducting Thienothiophene Copolymers: Design, Synthesis, Morphology and Performance in Thin Film Organic Transistors

March 1, 2009
Author(s)
Iain McCulloch, Martin Heeney, Michael L. Chabinyc, Dean DeLongchamp, Regis J. Kline, Michael Colle, Warren Duffy, Daniel A. Fischer, David J. Gundlach, Behrang Hamadani, Rick Hamilton, Lee J. Richter, Alberto Salleo, Martin Shkunov, David Sparrowe, Steve Tierney, Weimin Zhang
Organic semiconductors are emerging as a viable alternative to amorphous silicon in a range of thin film transistor devices. , With the possibility to formulate these p-type materials as inks and subsequently print into patterned devices, organic based

Understanding Imaging and Metrology with the Helium Ion Microscope

March 1, 2009
Author(s)
Michael T. Postek, Andras Vladar, Bin Ming
The development of accurate metrology for the characterization of nanomaterials is one barrier to innovation confronting all phases of nanotechnology. Ultra-high resolution microscopy is a key technology needed to achieve this goal. But, current microscope

Use of Neutron Imaging for PEMFC Performance Analysis and Design

March 1, 2009
Author(s)
T Trabold, Jon P. Owejan, Jeffrey J. Gagliardo, David L. Jacobson, Daniel S. Hussey, Muhammad D. Arif
Efficient water management is one of the key design objectives for proton exchange membrane fuel cells (PEMFCs), due to the influence of water on material selection, hardware configuration, and stack operating conditions. Neutron imaging has proven to be

Optimizing the Dynamic Range Extension of a Radiochromic Film Dosimetry System

February 28, 2009
Author(s)
Slobodan Devic, Tomic Nada, Christopher G. Soares, Ervin Podgorsak
We present a radiochromic film dosimetry protocol for a multi-color channel radiochromic film dosimetry system consisting for the EBT model GAFCHROMIC(TM) film and the Epson Expression 1680 flat-bed document scanner. Instead of extracting only the red

A parametric interatomic potential for graphene

February 27, 2009
Author(s)
Vinod K. Tewary, B. Yang
A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: bond energy and radial interaction energy. The bond energy part is a generalized version of the Tersoff-Brenner potential. It includes angular terms

Characterization of the Photoacid Diffusion Length

February 27, 2009
Author(s)
Shuhui Kang, Vivek Prabhu, Wen-Li Wu, Eric K. Lin, Kwang-Woo Choi, Manish Chandhok, Todd Younkin, Wang Yueh
The photoacid diffusion length is a critical issue for EUV photoresists and photolithography because it governs critical dimension (CD), line-edge-roughness (LER) and line-width-roughness (LWR). This paper provides an approach to characterize the photoacid

Energy Efficient Lighting - Solid State Luminaires (Handbook 150-1A)

February 27, 2009
Author(s)
C Cameron Miller, Lawrence I. Knab, Ambler Thompson, Jon M. Crickenberger
NIST Handbook 150-1A presents technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Energy Efficient Lighting/Solid State Lighting program. It is intended for

Evaluation of Image Quality of Thermal Imagers used by the Fire Service

February 27, 2009
Author(s)
Francine K. Amon, Andrew J. Lock
This document reports on the test results of an evaluation of the image quality of thermal imaging cameras used by the fire service. The test methods used were consistent with the image quality test methods included in Draft National Fire Protection

Results from a Full-scale Smoke Alarm Sensitivity Study

February 27, 2009
Author(s)
Thomas G. Cleary
A series of 24 full-scale experiments was conducted during the summer of 2008 to examine the effects of alarm type (photoelectric, ionization, and dual sensor), alarm location, fabric type (100 % cotton and 100 % polyester), polyurethane foam density

Evaluation of Image Quality of Thermal Imagers used by the Fire Service

February 26, 2009
Author(s)
Francine K. Amon, Andrew J. Lock
This document reports on the test results of an evaluation of the image quality of thermal imaging cameras used by the fire service. The test methods used were based on the test methods included in Draft NFPA 1801 Standard on Thermal Imagers for the Fire

Surface plasmon resonance imaging of cells and surface-associated fibronectin

February 26, 2009
Author(s)
Alexander W. Peterson, Michael W. Halter, Alessandro Tona, Kiran Bhadriraju, Anne L. Plant
Background A critical challenge in cell biology is quantifying the interactions of cells with their extracellular matrix (ECM) environment and the active remodeling by cells of their ECM. Fluorescence microscopy is a commonly employed technique for
Displaying 28676 - 28700 of 73697
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