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Search Publications

NIST Authors in Bold

Displaying 18076 - 18100 of 74035

Phase Transitions and Magnetocaloric Effect in Mn 3 Cu 0.89N d0.96^

August 1, 2014
Author(s)
Jun Yan, Ying Sun, Hui Wu, Qingzhen Huang, Cong Wang, Zaixing Shi, Sihao Deng, Kewen Shi, Huiqing Lu, Lihua Chu
We report the large magnetic entropy change observed in the antiperovskite Mn 3Cu 0.89N 0.96. Based in the heat flow peak measured by differential scanning calorimeter (DSC), the total entropy change according to the structural transition (tetragonal to

The effect of protein corona composition on the interaction of carbon nanotubes with human blood platelets

August 1, 2014
Author(s)
Silvia H. De Paoli Lacerda, Lukas Diduch, Tseday Tegegn, Martina Orecna, Michael Strader, Elena Karnaukhova, John E. Bonevich, Abdu Alayash, Karel Holada, Jan Simak
Carbon nanotubes (CNT) are one of the most promising nanomaterials for use in medicine. Applications of CNT in drug/gene delivery, diagnostics and tissue engineering, among other applications, require contact of CNT with blood. Therefore, evaluation of

Transportation Effect of the Ni-Cr Based Metal-Foil Standard Resistors in the Trilateral Comparison Pilot Study between KRISS, NIST and NMIJ

August 1, 2014
Author(s)
Randolph E. Elmquist, Nobu-hisa Kaneko, Takehiko Oe, Wan-Seop Kim, Dong Hun Chae, Marlin E. Kraft
This paper describes a study on the transportation effect using four 100 Ω standard resistors of a new construction. All resistors have been transported by air: two of the resistors in hand-carried luggage and the other two by normal air freight. The

A Measurement Metric for Forensic Latent Fingerprint Preprocessing

July 31, 2014
Author(s)
Haiying Guan, Andrew Dienstfrey, Mary Frances Theofanos, Brian Stanton
Although fingerprint mark-up and identification are well-studied fields, forensic fingerprint image preprocessing is still a relatively new domain in need of further scientific study and development of guidance of best practice. Latent fingerprint image

Device-Level PBTI-induced Timing Jitter Increase in Circuit-Speed Random Logic Operation

July 31, 2014
Author(s)
Jiwu Lu, Canute I. Vaz, Jason P. Campbell, Jason T. Ryan, Kin P. Cheung, Guangfan Jiao, Gennadi Bersuker, Chadwin D. Young
We utilize eye-diagram measurements of timing jitter to investigate the impact of PBTI in devices subject to DC as well as ring oscillator (RO) and pseudo-random binary sequence (PRBS) stress waveforms. We observe that RO measurements miss the relevant

Membrane protein resistance of oligo(ethylene oxide) self-assembled monolayers

July 31, 2014
Author(s)
David J. Vanderah, Marlon L. Walker, David T. Gallagher, Ryan Vierling, Fay Crawshaw
Spectroscopic ellipsometry was used to evaluate the resistance to protein adsorption (RPA) of self- assembled monolayers (SAMs) of HS(CH2)3O(CH2CH2O)6M and [HS(CH2)3CH]2O-(CH2CH2O)6M, where M = CH3 or H, on Au. The SAMs were exposed to fibrinogen, a

Metrology for comparison of displacements at the picometer level

July 31, 2014
Author(s)
Jack A. Stone Jr., Patrick F. Egan, Jay H. Hendricks, Gregory F. Strouse, Douglas A. Olson, Jacob E. Ricker, Gregory E. Scace, Donavon Gerty
An apparatus capable of comparing displacements with picometer accuracy is currently being designed at NIST. In principle, we wish to compare one displacement in vacuum to a second, equal displacement in gas, in order to determine gas refractive index. If

Ontology Analysis if Global Gene Expression Differences of Human Bone Marrow Stromal Cells Cultured on 3D Scaffolds or 2D Films

July 31, 2014
Author(s)
Bryan A. Baker, Patrick S. Pine, Kaushik Chatterjee, Girish Kumar, Jennifer H. McDaniel, Marc L. Salit, Carl G. Simon Jr.
Differences in gene expression of human bone marrow stromal cells (hBMSCs) during culture in three-dimensional (3D) nanofiber scaffolds or on two-dimensional (2D) films were investigated via pathway analysis of microarray mRNA expression profiles. Previous

Polyelectrolyte Multilayers in Microfluidic Systems for Biological Applications

July 31, 2014
Author(s)
Saugandhika S. Minnikanti, Aveek Gangopadhyay, Darwin Reyes-Hernandez
The formation of polyelectrolyte multilayers (PEMs) for the first time two decades ago demonstrating the assembly on charged substrates in a very simple and efficient way have proven to be a reliable method to obtain structures tunable at the nanometer

Ultra-Low-Field NMR Relaxation and Diffusion Measurements Using an Optical Magnetometer

July 31, 2014
Author(s)
John E. Kitching, P. Ganssle, H Shin, Scott J. Seltzer, Vikram S. Bajaj, Micah P. Ledbetter, Dimitry Budkerl, Svenja A. Knappe, A Pines
In this work, we have demonstrated for the first time that an alkali vapor cell magnetometer has sufficient sensitivity to chemically resolve a heterogeneous mixture of oil and water by its relaxation and diffusion properties, both in one dimensional

Characterization of Buried Structure in Directed Self Assembly Block Copolymers

July 30, 2014
Author(s)
Daniel F. Sunday, Matthew R. Hammond, Chengqing C. Wang, Wen-Li Wu, Dean M. DeLongchamp, Regis J. Kline, Melia Tjio, Joy Cheng, Jed W. Pitera
The directed self assembly (DSA) of block copolymers (BCP) can multiply or subdivide the pitch of a lithographically defined chemical or topological pattern and is a resolution enhancement candidate to augment conventional lithography for patterning sub-20

Performance Metrics for Evaluating Object and Human Detection and Tracking Systems

July 30, 2014
Author(s)
Afzal A. Godil, Roger Bostelman, William P. Shackleford, Tsai H. Hong, Michael O. Shneier
In this report, we provide an overview of various performance evaluation metrics for object detection and tracking for robot safety applications in smart manufacturing. We present four different types of performance evaluation metrics based on detection

Microfluidic Remote Loading for Rapid Single-Step Liposomal Drug Preparation

July 29, 2014
Author(s)
Wyatt N. Vreeland, Renee R. Hood, Don L. DeVoe
Here we report a microfluidic system that enables rapid and efficient remote loading of amphipathic drugs into nanoscale liposomes, combining liposome synthesis and remote drug loading in a continuous integrated process. Unlike established bulk methods for

Neutron, Electron, and X-ray Scattering Investigation of Cr 1-x V x Near Quantum Criticality

July 29, 2014
Author(s)
D. A. Sokolov, M. C. Aronson, L. Wu, Y. Zhu, C. Nelson, J. F. Mansfield, K. Sun, Ross Erwin, Jeffrey W. Lynn, M. Lumsden, S. E. Nagler
The weakness of electron-electron correlations in the itinerant antiferromagnet Cr doped with V has long been considered the reason that neither new collective electronic states or even non Fermi liquid behaviour are observed when antiferromagnetism in Cr
Displaying 18076 - 18100 of 74035