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Displaying 13851 - 13875 of 73922

What Happened to Software Metrics?

May 25, 2017
Author(s)
Jeffrey M. Voas, David R. Kuhn
In the 1980's, the software quality community was all 'a buzz' with seemingly endless 'potential' approaches for producing higher quality software. At the forefront of that was software metrics, along with the corresponding software testing techniques and

Electric field metrology for SI traceability: Systematic measurement uncertainties in electromagnetically induced transparency in atomic vapor

May 24, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon, Georg Raithel, dave Anderson
We investigate the relationship between the Rabi frequency ($\Ω_{RF}$, related to the applied electric field) and Autler-Townes (AT) splitting, when performing atom-based radio- frequency (RF) electric (E) field strength measurements using Rydberg states

The Indianapolis Flux Experiment (INFLUX): A test-bed for developing anthropogenic greenhouse gas emission measurements.

May 23, 2017
Author(s)
Ken Davis, Kevin Gurney, R. M. Hardesty, Shepson Paul, Colm Sweeney, Jocelyn Turnbull, James Whetstone, Anna Karion
The objective of the Indianapolis Flux Experiment (INFLUX) is to develop, evaluate and improve methods for measuring greenhouse gas (GHG) emissions from cities. INFLUX's scientific objectives are to quantify CO2 and CH4 emission rates at 1 km2 resolution

Counting Near Infrared Photons with Microwave Kinetic Inductance Detectors

May 22, 2017
Author(s)
Jiansong Gao, Michael R. Vissers, Joel N. Ullom, Johannes Hubmayr, Joseph W. Fowler, Leila R. Vale, Weijie Guo
We demonstrate photon counting at 1550~nm wavelength using microwave kinetic inductance detectors (MKIDs) made from TiN/Ti/TiN trilayer films with superconducting transition temperature $T_{c} \sim$ 1.4~K. The detector has a lump-element design with a

Impact of RRAM Read Fluctuations on the Program-Verify Approach

May 22, 2017
Author(s)
David M. Nminibapiel, Dmitry Veksler, Pragya Shrestha, Jason Campbell, Jason Ryan, Helmut Baumgart, Kin P. Cheung
The stochastic nature of the conductive filaments in oxide-based resistive memory (RRAM) represents a sizeable impediment to commercialization. As such, program-verify methodologies are highly alluring. However, it was recently shown that program-verify

Trion Valley Coherence in Monolayer Semiconductors

May 22, 2017
Author(s)
Kai Hao, Lixiang Xu, Wu Fengcheng, Philip Nagler, Kha Tran, Xin Ma, Tobias Korn, Allan H. MacDonald, Xiaoqin Li, Galan Moody
The emerging field of valleytronics aims to exploit the valley pseudospin of electrons residing near Bloch band extrema as an information carrier. Recent experiments demonstrating optical generation and manipulation of exciton valley coherence (the

Devices in advanced technology nodes: application-specific characterization

May 21, 2017
Author(s)
gennadi bersuker, Dmitry Veksler, Donald Pierce, Maribeth Mason
Scaled advanced node devices incorporate new combinations of semiconductor materials and ultra-thin multi-layer dielectric stacks. As a consequence, inter-material interactions may unpredictably affect transistor electrical characteristics and reliability

Preservation of surface conductivity and dielectric loss tangent in large-scale, encapsulated epitaxial graphene measured by non-contact microwave cavity perturbations

May 19, 2017
Author(s)
Albert F. Rigosi, Nicholas R. Glavin, Chieh-I Liu, Yanfei Yang, Jan Obrzut, Heather M. Hill, Jiuning Hu, Hsin Y. Lee, Angela R. Hight Walker, Curt A. Richter, Randolph E. Elmquist, David B. Newell
Regarding the improvement of current quantized Hall resistance (QHR) standards, one promising avenue is the growth of homogeneous monolayer epitaxial graphene (EG). A clean and simple process was used to produce large, precise areas of EG. Properties like

A telecom-band cavity-enhanced single-photon source with high klyshko efficiencies

May 18, 2017
Author(s)
Thomas Gerrits, Lu Xiyuan, Steven Rogers, W C. Wiang, Sae Woo Nam, Qiang Lin
We develop an on-chip telecom-band single-photon source with Klyshko efficiencies up to 48%, the highest value for cavity-enhanced photon sources. For the first time, we relate Klyshko efficiency to high-order correlations and verify this relation

Determination of the molar mass of argon from a high precision acoustic comparison

May 18, 2017
Author(s)
XiaoJuan Feng, Jintao Zhang, Michael R. Moldover, Inseok Yang, Mark Plimmer, H. Lin
This article describes the accurate determination of the molar mass of a sample of argon gas used for a determination of the Boltzmann constant. The method due to one of the authors [Moldover et al., J. Res. Natl. Bur. Stand. 93, 85-144 (1988)] uses the

Optomechanical Quantum Correlations

May 18, 2017
Author(s)
Thomas P. Purdy, Karen E. Grutter, Kartik A. Srinivasan, Nikolai N. Klimov, Zeeshan Ahmed, Jacob M. Taylor
We present methods to measure optical quantum correlations arising from an optomechanical interaction even when large classical noise sources are present. We demonstrate quantum- backaction-noise-calibrated Brownian motion thermometry as a metrological

Quantum theory solved by experiment

May 18, 2017
Author(s)
Ian B. Spielman
Systems of quantum objects can be characterized by the correlations between the objects. A technique has been developed to precisely measure even the most delicate correlations, allowing theoretical models of quantum systems to be tested. See Schweigler et

Quasi-deterministic Model for Doppler Spread in Millimeter-wave Commmunication Systems

May 18, 2017
Author(s)
Jian Wang, Camillo Gentile, Peter B. Papazian, Jae-Kark Choi, Jelena Senic
The most salient feature differentiating millimeter-wave communication systems from their predecessors will be the steerable pencilbeam antennas at the transceivers. As opposed to conventional widebeam antennas, only a few multipath components will be

Advances in Next-Generation Polyolefin Standard Reference Materials

May 17, 2017
Author(s)
Sara V. Orski, Wesley S. Farrell, Andre M. Striegel, Kathryn L. Beers
NIST’s approach to modernizing its synthetic polymer reference materials is to target precise and robust synthetic methods, making homogeneous standards than can be easily tailored to include desired chemistry, molar mass, and topography. This strategy
Displaying 13851 - 13875 of 73922
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