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Displaying 23476 - 23500 of 73929

Performance of Steel Moment Connections under a Column Removal Scenario. I: Experiments

April 3, 2012
Author(s)
Hai S. Lew, Joseph A. Main, Stephen D. Robert, Fahim Sadek, Vincent Chiarito
This paper presents an experimental study of two full-scale steel beam-column assemblies, each comprising three columns and two beams, to (1) define their response characteristics under a column removal scenario, including the capacity of the beams and

Performance of Steel Moment Connections under a Column Removal Scenario. II: Analysis

April 3, 2012
Author(s)
Fahim H. Sadek, Joseph Main, Hai S. Lew, Sherif El-Tawil
This paper presents a computational investigation of the response of steel beam-column assemblies with moment connections under monotonic loading conditions simulating a column removal scenario. Two beam-column assemblies are analyzed, which incorporate (1

Basing Cybersecurity Training on User Perceptions

April 2, 2012
Author(s)
Susanne M. Furman, Mary F. Theofanos, Yee-Yin Choong, Brian C. Stanton
The National Initiative for Cybersecurity Education (NICE) will be conducting a nationwide awareness and outreach program to effect behavioral change. To be effective, an educational campaign must first understand users’ perceptions of computer and online

Dielectrophoretic Cell Capture on Polyester Membranes

April 2, 2012
Author(s)
Conni Hanke, Petra S. Dittrich, Darwin Reyes-Hernandez
A new system for dielectrophoretic cell capture on porous polyester (PET) membranes is presented. Conventional photolithographic techniques were used to fabricate gold microelectrodes on a PET membrane. We characterized these electrodes to proof that there

Paramagnetic Spin Correlations in Colossal Magnetoresistive La 0.7 Ca 0.3 MnO 3

April 2, 2012
Author(s)
Joel Helton, Matthew B. Stone, Dmitry A. Shulyatev, Yakov M. Mukovskii, Jeffrey W. Lynn
Neutron spectroscopy measurements reveal dynamic spin correlations throughout the Brillouin zone in the colossal magnetoresistive system La 0.7Ca 0.3MnO 3 at 265 K ({approx}1.03T c). The long-wavelength behavior is consistent with spin diffusion, yet an

Workflow and Electronic Health Records in Small Medical Practices

April 2, 2012
Author(s)
Mala Ramaiah, Eswaran Subrahmanian, Ram D. Sriram, Bettijoyce B. Lide
This paper analyzes the workflow and implementation of electronic health record (EHR) systems across different functions in small physician offices. We characterize the differences in the offices based on the levels of computerization in terms of workflow

Mechanisms of free radical-induced damage to DNA

April 1, 2012
Author(s)
M Miral Dizdar, Pawel Jaruga
Endogenous and exogenous sources cause free radical-induced DNA damage in living organisms by a variety of mechanisms. The highly reactive hydroxyl radical reacts with the heterocyclic DNA bases and the sugar moiety near or at diffusion-controlled rates by

Neutron Studies of Tb 2 Mo 2 O 7

April 1, 2012
Author(s)
Jason S. Gardner, G. Ehlers, S. O. Diallo
We have used the new high energy resolution spectrometer (BaSis), at the Spallation Neutron Source in Oak Ridge, to conclusively prove the existence of a low energy mode at 0.34(1) meV in the spin glass Tb 2mo 2O 7. This mode is reminiscent of the

Optical fiber-coupled cryogenic radiometer with carbon nanotube absorber

April 1, 2012
Author(s)
David J. Livigni, Nathan A. Tomlin, Christopher L. Cromer, John H. Lehman
A cryogenic radiometer was constructed for direct-substitution optical fiber power measurements. The cavity is intended to operate at the 3 K temperature stage of a dilution refrigerator or 4.2 K stage of a liquid cryostat. The optical fiber is removable

The Evolution of Time Measurement Part V: Radio Controlled Clocks

April 1, 2012
Author(s)
Michael A. Lombardi
A historical article about the origins and the development of radio controlled clocks (Part IV of a IV-part series). It describes the first time signal radio stations, the early use of telegraphic time codes, and the modern use of digital time codes. It

Electronic properties of multilayer graphene

March 31, 2012
Author(s)
Hongki Min
In this chapter, we study the electronic structure of arbitrarily stacked multilayer graphene in the absence or presence of magnetic field. Energy band structure and Landau level spectrum are obtained using a pi-orbital continuum model with nearest

Graphene Carrier Transport Theory

March 31, 2012
Author(s)
Shaffique Adam
In this chapter we study the mechanisms for carrier transport in two dimensional graphene sheets. We demonstrate that at high carrier density, graphene's transport properties depend both on the type of impurities present and on graphene's screening

Nonlinear Modal Analysis of Structures with Rigid-End Offsets

March 31, 2012
Author(s)
Kevin K. Wong
The nonlinear modal analysis (NMA) methodology for analyzing moment-resisting framed structures is here extended to include frame elements with rigid-end offsets. Four keys components of the NMA methodology for conducting dynamic analysis of nonlinear
Displaying 23476 - 23500 of 73929
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