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Displaying 22726 - 22750 of 73741

Information Retrieval on the Blogosphere

July 30, 2012
Author(s)
Ian M. Soboroff, Rodrygo Santos, Craig Macdonald, Richard McCreadie, Iadh Ounis
Blogs have recently emerged as a new open, rapidly evolving and reac- tive publishing medium on the Web. Rather than managed by a central entity, the content on the blogosphere—the collection of all blogs on the Web—is produced by millions of independent

On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing

July 30, 2012
Author(s)
Thomas Gerrits, Nick Thomas-Peter, James Gates, Adriana E. Lita, Benjamin Metcalf, Brice R. Calkins, Nathan A. Tomlin, Anna E. Fox, Antia A. Lamas-Linares, Justin Spring, Nathan Langford, Richard P. Mirin, Peter Smith, Ian Walmsley, Sae Woo Nam
We demonstrate the operation of an integrated photon number resolving transition edge sensor (TES), operating in the telecom band at 1550 nm, employing an evanescently coupled design that allows the detector to be placed at arbitrary locations within a

Towards One-electron Ions in Rydberg States for Laser Spectroscopy

July 30, 2012
Author(s)
Joseph Tan, Samuel Brewer, Nicholas D. Guise
Simple quantum systems play important roles in the determination of fundamental constants. Very recently at NIST, bare nuclei created in an EBIT were extracted and captured in a novel compact Penning trap. This is a step towards production of one-electron

Transition edge sensors with low jitter and fast recovery times

July 30, 2012
Author(s)
Antia A. Lamas-Linares, Nathan A. Tomlin, Brice R. Calkins, Adriana E. Lita, Thomas Gerrits, Joern Beyer, Richard P. Mirin, Sae Woo Nam
Superconducting transition edge sensors (TES) for single photon detection have been shown to have almost perfect quantum efficiency (98%) at a wide range of wavelengths. Their high quantum efficiency combined with their ability to intrisically measure the

Feature-preserved 3D Canonical Form

July 28, 2012
Author(s)
Afzal A. Godil, Zhouhui Lian
Abstract Measuring the dissimilarity between non-rigid objects is a challenging problem in 3D shape retrieval. One potential solution is to construct the models’ 3D canonical forms (i.e., isometry-invariant representations in 3D Euclidean domain) on which

Quantitative Methods to Characterize Cell Lines: Comparison of Cells from Marine and Terrestrial Mammals.

July 28, 2012
Author(s)
Tighe Spurlin, John T. Elliott, Michael W. Halter, Kiran Bhadriraju, Alessandro Tona, Anne L. Plant, Annalaura Mancia, Bobby L. Middlebrooks, Gregory W. Warr
Descriptive terms are often used to characterize cells in culture, but the use of nonquantitative and poorly defined terms can lead to ambiguities when comparing data from different laboratories. Although recently there has been a good deal of interest in

The Date-Time Vocabulary

July 28, 2012
Author(s)
Mark H. Linehan, Edward J. Barkmeyer Jr., Stan Hendryx
The Date-Time Vocabulary is a new OMG specification that models continuous time, discrete time, the relationship of events and situations to time, language tense and aspect, time indexicals, timetables, and schedules. It offers a "business vocabulary" (i.e

An Integrated Data Model for Quality Information Exchange in Manufacturing Systems

July 27, 2012
Author(s)
William G. Rippey, Yaoyao F. Zhao, Thomas R. Kramer, John A. Horst, Frederick M. Proctor
Quality measurement is an integrated part of modern manufacturing systems. As the manufacturing industry has entered a digital and virtual era, information technology has become increasingly important for both machining and measurement systems. Effective

Conformance of Image Features to Classifier Assumptions

July 27, 2012
Author(s)
Julien M. Amelot, Peter Bajcsy, Mary C. Brady
Cell measurements are derived frequently from the results of pixel classification and contiguous region segmentation of microscopy images. Image segmentation is accomplished by classifying image pixels based on high dimensional image features computed from

Firebrand Generation Data Obtained from a Full Scale Structure Burn

July 27, 2012
Author(s)
Sayaka S. Suzuki, Samuel Manzello, Matthew Lage, George Laing
A full scale, proof-of-concept experiment was conducted to investigate firebrand production from a burning structure. In this experiment, NIST researchers were invited to set up instrumentation during a structure burn down. As the structure burned

Information Required for Dimensional Measurement

July 27, 2012
Author(s)
John A. Horst, Curtis Brown, Robert Brown, Larry Maggiano, K Summerhays, Thomas R. Kramer
Much work has been done by standards organizations to model dimensional measurement information in digital formats, but the work done has revealed that standard digital formats from upstream processes are currently insufficient to enable the automatic

Multiple electrokinetic actuators for feedback control of colloidal crystal size

July 27, 2012
Author(s)
Jaime Juarez, Pramod Mathai, James Alexander Liddle, Michael Bevan
We report a feedback method for controlling the sizes of hexagonally close packed two-dimensional colloidal crystals in a microfluidic quadrupole electrode device. Crystal size, measured by the number of colloidal particles comprising the crystal, is

Non-statistical population distributions for hydrogen beam in fusion plasmas

July 27, 2012
Author(s)
O. Marchuk, Yuri Ralchenko, D. R. Schultz
Most atomic models for a neutral hydrogen beam in fusion plasmas assume statistical (Boltzmann) distribution of populations for excited states with the same principal quantum number n. Here we analyze population distributions for the excited magnetic

Improving Quantum Clocks via Semidefinite Programming

July 26, 2012
Author(s)
Michael J. Mullan, Emanuel H. Knill
The accuracies of modern quantum logic clocks have surpassed those of standard atomic fountain clocks. These clocks also provide a greater degree of control, as before and after clock queries, we are able to apply chosen unitary operations and measurements

High-speed thermo-microscope for imaging thermal desorption phenomena

July 25, 2012
Author(s)
Matthew E. Staymates, John G. Gillen
In this work, we describe a new imaging system, called a thermo-microscope, that can be used to visualize atmospheric pressure thermal desorption phenomena at high heating rates and frame rates. The system consists of a zoom lens coupled to a high-speed

Solubility of Water in 1-Octanol from 2 degC to 96 degC

July 25, 2012
Author(s)
Brian E. Lang
The solubility of water in 1-octanol was measured from 2 °C to 96 °C by coulometric Karl Fischer titration. The mass fraction solubility at 25 ° was found to be (48.91 ± 0.13) mg/g. Experiments also indicated the existence of a pseudo-equilibrium state

Spectroscopic defect imaging in magnetic nanostructure arrays

July 25, 2012
Author(s)
Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert McMichael
We report a demonstration of spectroscopic defect imaging in an array of ferromagnetic structures using ferromagnetic resonance force microscopy (FMRFM). The arrray of 200 nm diameter circular dots includes a single oval-shaped "defect." The technique

Stress Control in Electrodeposited CoFe Films - Experimental Study and Analytical Model

July 25, 2012
Author(s)
Stanko R. Brankovic, Burhanuddin Kagajwala, Jinnie George, Shruti Santangopalan, Gery R. Stafford, Paul Ruchhoeft
The work investigating the effect of saccharine as an additive on growth stress and structure of electrodeposited CoFe films is presented. The saccharine concentrations were in the range between 0 gL^(-1) and 1.5 g^(L-1). The stress measurements are

A New Measure in Cell Image Segmentation Data Analysis

July 24, 2012
Author(s)
Jin Chu Wu, Michael W. Halter, Raghu N. Kacker, John T. Elliott
Cell image segmentation (CIS) is critical for quantitative imaging in cytometric analyses. The data derived after segmentation can be used to infer cellular function. To evaluate CIS algorithms, first for dealing with comparisons of single cells treated as

What Continuous Monitoring Really Means

July 24, 2012
Author(s)
Ronald S. Ross
[Print Title: "Establishing a Secure Framework"] Recently, NIST completed a fundamental transformation of the traditional certification and accreditation process into a comprehensive, near real-time, security life cycle process as part of a Risk Management
Displaying 22726 - 22750 of 73741
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