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Displaying 3701 - 3725 of 74027

Tunable Multiferroic Properties in Nanocomposite PbTiO3-CoFe2O4 Epitaxial Thin Films

October 12, 2021
Author(s)
Makoto Murakami, K S. Chang, M A. Aronova, C L. Lin, M-H Yu, Jason Hattrick-Simpers, M. Wuttig, Ichiro Takeuchi, C Gao, S E. Lofland, Leonid A. Bendersky
We report on the synthesis of PbTiO3-CoFe2)4 (PTO-CFO) multiferroic nanocomposite and continuous turning of their ferroic properties as a function of composition on thin-film composition spreads. Highest dielectric constant and non-linear dielectric signal

Tuning the Fragility of Polymer Melts With Antiplasticizer Additives

October 12, 2021
Author(s)
Robert A. Riggleman, K Yoshimoto, Jack F. Douglas, J J. de Pablo
Using molecular dynamics simulations, we have developed and analyzed a model that exhibits antiplasticization behavior by decreasing the glass transition temperature, increasing the density of the system below the glass transition temperature of the pure

Tuning the Mean-Field Energy in a Fermi Gas of Atoms

October 12, 2021
Author(s)
C A. Regal, Deborah S. Jin
An exotic superfluid phase has been predicted for an ultracold gas of fermionic atoms. Experimenters have cooled these gases into the quantum degenerate regime and explored collisional effects. However, quantum mechanical many-body interaction phenomena

Two Sides Ignition Over a Thin PMMA Sheet in Microgravity

October 12, 2021
Author(s)
Y N. Nakamura, Takashi Kashiwagi, S L. Olson, K K. Nishizawa, O -. Fujita
A series of the experiments was conducted in microgravity to study the ignition characteristics of a thin PMMA sheet (thicknesses of 0.2 mm and 0. 4 mm) using a CO2 laser as an external radiant source. Two separate ignition events were observed, the first

Two Stage Forming: Experimental and FE Analysis

October 12, 2021
Author(s)
M C. Oliveira, A J. Baptista, J L. Alves, L F. Menezes, D E. Green, Thomas H. Gnaupel-Herold, Mark Iadicola, Timothy J. Foecke, T B. Stoughton
One of the present challenges in sheet metal forming is to simulate sequential production stages, from the initial blank sheet to the final part ready for assembly. In this context, it is fundamental to evaluate the forming characteristics of the materials

Ultrafast Spin Phenomena in Highly Excited N-Doped GaAs

October 12, 2021
Author(s)
R Bratschitsch, Z Chen, Steven T. Cundiff
We perform time-resolved Faraday rotation exeriments on undoped and n-doped GaAs samples at high optical excitation densities. The Faraday rotation signal linearly increases with optical excitation density. The excitation dependence of the electron g

Ultrasonic Melt Temperature Measurement During Extrusion

October 12, 2021
Author(s)
J Shen, Eric Edwards, C L. Thomas, Anthony J. Bur
An ultrasonics sensor, which can be used at polymer processing temperatures, was developed and used to monitor temperature of a polymer extrudate. This was accomplished by establishing a calibration function between the measured ultrasonics velocity and

Understanding Deviations in Lithographic Patterns Near Interfaces: Characterization of Antireflective Coatings (ARC) and the ARC/Resist Interface

October 12, 2021
Author(s)
Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Daniel A. Fischer, S Sambasivan, Eric K. Lin, Wen-Li Wu, Douglas Guerrero, Yijun Wang, R Puligadda
Interactions between a bottom anti-reflective coating (BARC) and a photo-resist can critically impact lithographic patterns. For example, a lithographic pattern can shrink or spread near a BARC interface, a process called undercutting or footing

Universal RNA Reference Materials for Gene Expression

October 12, 2021
Author(s)
M Cronin, K Ghosh, F Sistare, J Quackenbush, V L. Vilker, C D. O'Connell
A NIST sponsored workshop entitled Metrology and Standards Needs for Gene Expression Technologies: Universal RNA Standards was held on March 28-29, 2003 to define the need for standardization of the biological component of RNA based molecular assays

University Involvement in ATP and Effect on Project Outputs

October 12, 2021
Author(s)
F A. Moris, C Chang, Andrew J. Wang
Universities play a key role in the U.S. innovation system. Universities are engaged in research at the scientific and technological frontier. Private companies may choose to collaborate with universities to gain access to eminent researchers and/or to

Unusual DNA Conformations From Intron 21 of the PKD1 Gene Cause Mutagenesis

October 12, 2021
Author(s)
A Bacolla, A Jaworski, A Larson, J P. Jakupciak, C D. O'Connell, R D. Wells
Intron 21 of the polycystic kidney disease 1 (PKD1) gene contains a 2.5 kbp of purine-pyrimidine asymmetry [poly(R-Y)] predicted to adopt unusual DNA structures (slipped, triplexes, tetraplexes)and proposed to cause mutations in the gene. The poly (R-Y)

Variational Methods for Microstructural Evolution

October 12, 2021
Author(s)
W Carter, J E. Taylor, John W. Cahn
The application of variational methods and gradient flows to principles of microstructural evolution are reviewed. For the cases considered in this paper, gradient flows specify a trajectory along with the free energy decreases most rapidly. The gradient

Vector-Valued Phase Field Model for Crystallization and Grain Boundary Formation

October 12, 2021
Author(s)
R Kobayashi, James A. Warren, W Carter
We propose a new model for calculation of the crystallization and impingement of many particles with differing orientations. Based on earlier phase field models, a vector order parameter is introduced, and thus orientation of crystal/disordered interfaces

Virial Coefficients of Mixtures

October 12, 2021
Author(s)
J H. Dymond, K N. Marsh, R C. Wilhoit, Michael D. Frenkel
This critical compilation of virial coefficients of mixtures is a sequel to The Virial Coefficients of Pure Gases and Mixtures, by J.H. Dymonand E.B. Smith (Oxford Universi Press, 1979) and a companion of Virial Coefficients of Gases and Gas Mixtures

Virtual Sensor Simulation Study of Flow During Resin Transfer Molding Process

October 12, 2021
Author(s)
S R. Kueh, S G. Advani, Richard~undefined~undefined~undefined~undefined~undefined Parnas
In any manufacturing environment, on-line sensing can play an important part in controlling the quality of the final product. Having a sensor embedded within the part itself is often the most effective means of monitoring its condition at various stages of

Viscous Flow Creep in Ceramics Containing Secondary Crystalline Phases

October 12, 2021
Author(s)
Q Jin, D S. Wilkinson, G C. Weatherly, William E. Luecke, Sheldon M. Wiederhorn
Experimental observations of the creep response of a Y 20 3-fluxed Si 3N 4 containing secondary crystalline phases(SP)are presented.The widths of grain-boundary amorphous films before and after creep have been characterized by using transmission electron
Displaying 3701 - 3725 of 74027