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Displaying 5551 - 5575 of 9857

Peak Fraction Purity and Chromatographic Resolution: Gaussian Peaks Revisited

January 19, 2022
Author(s)
Andre Striegel, Deborah Striegel
For incompletely resolved peak pairs, the purity of the chromatographic or fractographic fractions is oftentimes underestimated by the common user. This results in wasted time and effort while trying to achieve higher resolution than needed for the

An Algorithm for Correcting Systematic Energy Deficits in the Atom Probe Mass Spectra of Insulating Samples

April 15, 2020
Author(s)
Benjamin W. Caplins, Paul T. Blanchard, Ann C. Chiaramonti Debay, David R. Diercks, Luis Miaja Avila, Norman A. Sanford
Improvements in the mass resolution of a mass spectrometer directly correlate to improvements in peak identification and quantification. Here we describe a post-processing technique developed to increase the quality of mass spectra of strongly insulating

A Simulation Platform to Study the Human Body Communication Channel

October 7, 2019
Author(s)
Kamran Sayrafian, Katjana Krhac, Gregory Noetscher, Dina Simunic
Human Body Communication (HBC) is an attractive low complexity technology with promising applications in wearable biomedical sensors. In this paper, a simple parametric model based on the finite-element method (FEM) using a full human body model is

Implementations of the Tennessee Eastman Process in Modelica

February 22, 2018
Author(s)
Carla Martin-Villalba, Alfonso Urquia, Guodong Shao
The Tennessee Eastman process is a typical industrial process that consists of five main process units: a two-phase reactor where an exothermic reaction occurs, a separator, a stripper, a compressor, and a mixer. This is a nonlinear open-loop unstable

Time Dependent Driving Forces and the Kinetics of Tricalcium Silicate Hydration

April 22, 2015
Author(s)
Jeffrey W. Bullard, George W. Scherer, Jeffrey J. Thomas
Simulations of tricalcium silicate (C3S) hydration using a kinetic cellular automaton program, HydratiCA, indicate that the net rate depends both on C3S dissolution and on hydration product growth. Neither process can be considered the sole rate

Figure metrology for x-ray focusing mirrors with Fresnel holograms and photon sieves

June 20, 2014
Author(s)
Ulf Griesmann, Johannes A. Soons, Quandou (. Wang, Lahsen Assoufid
We report on interferometric measurements of the figure error of an ultra-precise mirror with the shape of an elliptical toroid for the diffraction limited focusing of hard x-rays from an undulator x-ray source. We describe measurement configurations using

CYCLE D Version 4.0: Theoretical Vapor Compression Cycle Design Program

June 23, 2009
Author(s)
J S. Brown, Piotr A. Domanski
This paper presents Version 4.0 of the CYCLE_D: NIST Vapor Compression Cycle Design Program. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquidline/ suction-line heat exchanger. In addition, the

Cyber Security Metrics and Measures

March 2, 2009
Author(s)
Paul E. Black, Karen A. Scarfone, Murugiah P. Souppaya
Metrics are tools to facilitate decision making and improve performance and accountability. Measures are quantifiable, observable, and objective data supporting metrics. Operators can use metrics to apply corrective actions and improve performance

Introducing "Insecure IT"

January 20, 2009
Author(s)
David R. Kuhn, Hart Rossman, Simon Liu
This article introduces a new department for IT Professional that will cover security in IT systems, ranging from desktops to global e-commerce networks. Our goal is to offer ideas to improve IT security, both by looking at ways it can go wrong as well as
Displaying 5551 - 5575 of 9857
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