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Displaying 25826 - 25850 of 73697

Fast high-resolution frequency agile spectroscopy of laser sources

October 24, 2010
Author(s)
Fabrizio R. Giorgetta, Ian R. Coddington, Esther Baumann, William C. Swann, Nathan R. Newbury
Time-resolved, high-accuracy and high-resolution spectroscopy of frequency-agile cw lasers is critical to realizing their full potential for sensing, but is not possible with conventional spectroscopy methods. We demonstrate a dual comb-based spectrometer

Detection and Characterization of Selenoproteins by Tandem Mass Spectrometry Assisted by Laser Ablation Inductively Coupled Plasma Mass Spectrometry: Application to Human Plasma Selenoproteins

October 22, 2010
Author(s)
Guillaume Ballihaut, Lisa Kilpatrick, Eric L. Kilpatrick, William Davis
There has been an on-going effort and long term goal to accurately assess selenium status and selenium nutritional requirement in humans through the quantification of human plasma selenoprotein P (SelP) and glutathione peroxidase 3 (GPx3). To achieve this

Intrusion Detection and Prevention Systems

October 22, 2010
Author(s)
Karen A. Scarfone, Peter M. Mell
Intrusion detection is the process of monitoring the events occurring in a computer system or network and analyzing them for signs of possible incidents. An intrusion detection and prevention system (IDPS) is software that automates the intrusion detection

Structural Analysis of Soft Multicomponent Nanoparticle Clusters Using Electrospray Differential Mobility Analysis with Transmission Electron Microscopy

October 22, 2010
Author(s)
Leonard F. Pease , Jeremy Feldblyum, Silvia H. DePaoli Lacaerda, Rajesekhar Anumolu, Peter Yim, Matthew L. Clarke, Hyeong G. Kang, Jeeseong C. Hwang
Rapid and quantitative techniques are essential to analyze soft multicomponent nanoparticle clusters. Here we combine electrospray differential mobility analysis (ES-DMA), which measures the size of the entire cluster, with transmission electron microscopy

The evolving optical frequency comb

October 22, 2010
Author(s)
Scott A. Diddams
Much as natural historians search for the first roots of our human race, curiosity drives the laser scientist to pursue the roots of his or her own field. This is especially the case in this year where our community celebrates the 50th anniversary of the

A Focused Chromium Ion Beam

October 21, 2010
Author(s)
Adam V. Steele, Brenton J. Knuffman, Jabez J. McClelland, Jon Orloff
With the goal of expanding the capabilities of focused ion beam microscopy and milling systems, we have demonstrated nanoscale focusing of chromium ions produced in a magneto-optical trap ion source (MOTIS). Neutral chromium atoms are captured into a

Bicubic B-Spline Surface Approximation of Invariant Tori

October 20, 2010
Author(s)
Sita Ramamurti, David E. Gilsinn
The invariant torus of a coupled system of Van der Pol oscillators is approximated using bicubic B-splines. The paper considers the case of strong nonlinear coupling. In particular, the shapes of invariant torii for the Van der Pol coupling parameter $

Data Sets for the Qualification of Volumetric CT as a Quantitative Imaging Biomarker in Lung Cancer

October 20, 2010
Author(s)
Charles D. Fenimore, Andrew Buckler, Lawrence H. Schwartz, Nicholas Petrick, Michael McNitt-Gray, Binsheng Zhao, Anthony P. Reeves, P. David Mozeley, Ricardo S. Avila
The drug development industry is faced with increasing costs and decreasing success rates. New ways to understand biology as well as the increasing interest in personalized treatments for smaller patient segments requires new capabilities for the rapid

Investigation of Thermally Responsive Block Copolymer Thin Film Morphologies Using Surface Gradients

October 20, 2010
Author(s)
Jennifer Y. Kelly, Julie N. Albert, John A. Howarter, Shuhui Kang, Christopher Stafford, Thomas H. Epps, Michael J. Fasolka
We report the use of a gradient library approach to characterize the structure and behavior of thin films of a thermally-responsive block copolymer (BCP), poly(styrene-b-tert-butyl acrylate), that exhibits chemical deprotection and morphological changes

New Intermetallics YbAu2In4 and Yb2Au3In5

October 20, 2010
Author(s)
Peter C. Sebastian, James Salvador, Joshua B. Martin, Mercouri G. Kanatzidis
The intermetallic compounds YbAu2In4 and Yb2Au3In5 were obtained as single crystals in high yield from reactions run in liquid indium. Single crystal X-ray diffraction data of YbAu2In4 showed that it crystallizes as a new structure type in the monoclinic

Security Assurance Levels: A Vector Approach to Describing Security Requirements

October 20, 2010
Author(s)
James D. Gilsinn, Ragnar Schierholz
Safety systems have used the concept of safety integrity levels (SILs) for almost two decades. This allows the safety of a component or system to be represented by a single number that defines a protection factor required to ensure the health and safety of

Vision Guided Multi-Probe Assembly of 3D Microstructures

October 20, 2010
Author(s)
John D. Wason, John T. Wen, Young M. Choi, Jason J. Gorman, Nicholas Dagalakis
This paper describes the operator assisted automated assembly of a 3-legged spatial platform by using a vision guided multi-probe assembly process. This is the first step towards the ultimate goal of building a microscale active spatial platform. Two

Cell Contact Guidance in Response to Nanopattern Shape and Height

October 18, 2010
Author(s)
Sheng Lin-Gibson, Jirun Sun, Nancy J. Lin, Jing N. Zhou, Hyun W. Ro, Christopher L. Soles, Marcus T. Cicerone, Yifu Ding
Understanding the correlation between cell contact guidance (CG) and nanoscale surface features is vital in designing advanced medical devices to manipulate cell behaviors. Nanoscale surface features that mimic extracellular matrix are critical
Displaying 25826 - 25850 of 73697
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