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Displaying 6601 - 6625 of 73741

A Standard System Phantom for Magnetic Resonance Imaging

April 13, 2021
Author(s)
Maureen Ainslie, Michael A. Boss, Cecil Charles, Laurence Clarke, Jeffrey L. Evelhoch, Paul Finn, Derek L. Hill, Kathryn Keenan, Guoying Liu, Karl Stupic, Chun Yuan, Michele Martin, Maureen Ainslie, Nikki Rentz
A standard MRI system phantom has been designed and fabricated to assess scanner performance, scanner stability, scanner inter-comparability and accuracy of quantitative relaxation time imaging. The phantom is unique in having SI-traceability, a high level

Broadband generation of perfect Poincare beams via dielectric spin-multiplexed metasurface

April 13, 2021
Author(s)
Mingze Liu, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Si Zhang, Maowen Song, Song Zhang, Qianwei Zhou, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Poincaré beam, which describes the space-variant polarization of a light beam carrying spin angular momentum (SAM) and orbital angular momentum (OAM), plays an important role in various optical applications. Since the radius of a Poincaré beam depends on

Implementing a Registry Federation for Materials Science Data Discovery

April 13, 2021
Author(s)
Raymond L. Plante, Chandler Becker, Andrea M. Medina-Smith, Kevin G. Brady, Alden A. Dima, Benjamin J. Long, Laura M. Bartolo, Robert Hanisch
As a result of a number of national initiatives, we are seeing rapid growth in the data important to materials science that are available over the web. Consequently, it is becoming increasingly difficult for researchers to learn what data are available and

Magnetic Particle Self-Assembly at Functionalized Interfaces

April 13, 2021
Author(s)
Apurve Saini, Katharina Theis-Brohl, Alexandros Koutsioubas, Kathryn L. Krycka, Julie Borchers, Max Wolff
We study the assembly of magnetite nanoparticles in water-based ferrofluids in wetting layers close to silicon substrates with different functionalization without and with an out-of-plane magnetic field. For particles of nominal sizes 5 nm, 15 nm and 25 nm

Role of low molecular weight polymers on the dynamics of silicon anodes during casting

April 13, 2021
Author(s)
Mary Burdette, Beth Armstrong, Ryan Murphy, Luke Heroux, Mathieu Doucet, Stephen Trask, Alexander Rogers, Gabriel Veith
This work probes the slurry architecture of a high silicon content electrode slurry with and without low molecular weight polymeric dispersants as a function of shear rate to mimic electrode casting conditions for poly(acrylic acid) (PAA) and lithium

Systematic Merging of Nonfullerene Acceptor p-Extension and Tetrafluorination Strategies Affords Polymer Solar Cells with > 16% Efficiency

April 13, 2021
Author(s)
Subhrangsu Mukherjee, Dean DeLongchamp, Guoping Li, Xiaohua Zhang, Leighton Jones, Joaquin Alzola, Liang-Wen Feng, Weigang Zhu, Charlotte Stern, Junsheng Yu, Vinod K. Sangwan, Kevin L. Kohlstedt, Michael R. Wasielewski, Mark C. Hersam, George C. Schatz, Antonio Facchetti, Tobin Marks
The end-capping group (EG) is the essential electron-withdrawing component of nonfullerene acceptors (NFAs) in bulk heterojunction (BHJ) organic solar cells (OSCs). To systematically probe the impact of two frequent EG functionalization strategies, π

Anisotropic resonant x-ray diffraction of a conjugated polymer at the sulfur K-edge

April 12, 2021
Author(s)
Eliot Gann, Christopher McNeill, Guillaume Freychet
The planar, aromatic nature of the backbone of conjugated polymers endow them with anisotropic properties. Here we show that the resonant x-ray diffraction of a sulfur containing semicrystalline conjugated polymer at the sulfur K-edge is highly anisotropic

Certification of Standard Reference Material(R) 2686b Portland Cement Clinker

April 12, 2021
Author(s)
N. Alan Heckert, Laura Mundy, Paul E. Stutzman
A new Standard Reference Material® (SRM) for portland cement clinker has been produced for the Office of Standard Reference Materials at the National Institute of Standards and Technology (NIST). The SRM clinkers are intended for use in developing and

Challenge Design and Lessons Learned from the 2018 Differential Privacy Challenges

April 12, 2021
Author(s)
Diane Ridgeway, Mary Theofanos, Terese Manley, Christine Task
The push for open data has made a multitude of datasets available enabling researchers to analyze publicly available information using various statistical and machine learning methods in support of policy development. An area of increasing interest that is

Combinatorial Testing Metrics for Machine Learning

April 12, 2021
Author(s)
Erin Lanus, Laura Freeman, D. Richard Kuhn, Raghu N. Kacker
This short paper defines a combinatorial coverage metric for comparing machine learning (ML) data sets and proposes the differences between data sets as a function of combinatorial coverage. The paper illustrates its utility for evaluating and predicting

Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner

April 12, 2021
Author(s)
Harrison M. Skye, Wei Wu
Environmental concerns are driving regulations to reduce the use of hydrofluorocarbons (HFCs) with high global warming potential (GWP) as refrigerants in heat pumps. CO2 is an attractive alternative refrigerant because is it 'environmentally friendly' in

Robust Biological Hydrogen-Bonded Organic Framework with Post-Functionalized Rhenium(I) Sites for Efficient Heterogeneous Visible Light-Driven CO 2 Reduction

April 12, 2021
Author(s)
Baoqiu Yu, Lianjie Li, Shanshan Liu, Hailong Wang, Heyuan Liu, Chenxiang Lin, Chao Liu, Hui Wu, Wei Zhou, Xiyou Li, Tianyu Wang, Banglin Chen, Jianzhuang Jiang
A robust 2,2'-bipyridine (bpy)-derived biological hydrogenbonded framework (HOF-25) has been realized depending on guanine-quadruplex with the assistance of π-π interaction, which reacts with Re(CO) 5Cl to give a post-functionalized HOF-25-Re. Xray

Surveying the vampire bat (Desmodus rotundus) serum proteome: a resource for identifying immunological proteins and detecting pathogens

April 10, 2021
Author(s)
Ben Neely, Michael G. Janech, Alison Bland, Brock Fenton, Nancy B. Simmons, Daniel J. Becker
Bats (Order: Chiroptera) are increasingly studied as model systems for longevity and for their ability to seemingly tolerate typically virulent viruses without showing clinical disease. Yet our ability to characterize immune mechanisms of viral tolerance

Flourescently labeled cellulose nanofibers for environmental health and safety studies

April 9, 2021
Author(s)
Jeremiah Woodcock, Ilabahen A. Patel, Ryan Beams, Stephan J. Stranick, Jeffrey W. Gilman, Douglas M. Fox, Marina Mulenos, Christie Sayes, Maryam Salari, Deloid Glen, Philip Demokritou, Bryan Harper, Harper Stacey, Ong Kimberly, Jo Anne Shatkin
An optimal methodology for locating and tracking cellulose nanofibers (CNF) in vitro and in vivo is crucial to evaluate the environmental health and safety properties of these nanomaterials. Here, we report the use of a new boron-dipyrromethene (BODIPY)

Characterization and suppression of background light shifts in an optical lattice clock

April 8, 2021
Author(s)
Robert J. Fasano, Yun Jhih Chen, Will McGrew, Wesley Brand, Richard W. Fox, Andrew Ludlow
Experiments involving optical traps often require precise control of the ac Stark shifts induced by strong confining light fields. By carefully balancing light shifts between two atomic states of interest, optical traps at the magic wavelength have been

Intermediate Scattering Functions of a Rigid Body Monoclonal Antibody Protein in Solution Studied by Dissipative Particle Dynamic Simulation

April 8, 2021
Author(s)
Yanqin Zhai, Nicos Martys, William L. George, Joseph E. Curtis, Jannatun Nayem, Y. Z, Yun Liu
In the past decade, there is increased research interest in studying internal motions of flexible proteins in solution using Neutron Spin Echo (NSE) as NSE can simultaneously probe the dynamics at the length and time scale comparable to protein domain
Displaying 6601 - 6625 of 73741
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