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Search Publications

NIST Authors in Bold

Displaying 15176 - 15200 of 73697

Light Source Effects on Aerosol Photoacoustic Spectroscopy Measurements

October 6, 2016
Author(s)
James G. Radney, Christopher D. Zangmeister
Photoacoustic spectroscopy measurements of flame-generated soot aerosol coated with small amounts of water yielded absorption enhancements that were dependent on the laser used: quasi- continuous wave (Q-CW, ≈ 650 ps pulse duration and 78 MHz repetition

High Rank Elliptic Curves with Torsion Z/4Z induced by Kihara's Curves

October 5, 2016
Author(s)
Foad Khoshnam, Dustin Moody
Working over the field Q(t), Kihara constructed an elliptic curve with torsion group Z/4Z and five independent rational points, showing the rank is at least five. Following his approach, we give a new infinite family of elliptic curves with torsion group Z

Measurement of powder bed density in powder bed fusion additive manufacturing processes

October 5, 2016
Author(s)
Gregor Jacob, M A. Donmez, Shawn P. Moylan, John A. Slotwinski
There are many factors influencing the additive manufacturing (AM) processes resulting in high degree of variation in process outcomes. Therefore, quantifying these factors and their correlations to the process outcomes are important challenges to overcome

An Activity Model for Factory Design and Improvement

October 4, 2016
Author(s)
Kiwook Jung, Sangsu Choi, Boonserm Kulvatunyou, Hyunbo Cho, Katherine C. Morris
Smart Manufacturing Systems (SMS) are envisioned to contain highly-automated and IT-driven production systems. To address the complexity that arises in such systems, a standard and holistic model for describing the activities and their inter-relationships

Guide to Cyber Threat Information Sharing

October 4, 2016
Author(s)
Christopher S. Johnson, Mark L. Badger, David A. Waltermire, Julie Snyder, Clem Skorupka
Cyber threat information is any information that can help an organization identify, assess, monitor, and respond to cyber threats. Cyber threat information includes indicators of compromise; tactics, techniques, and procedures used by threat actors

Net-Zero Energy Residential Building Component Cost Estimates and Comparisons

October 4, 2016
Author(s)
Joshua D. Kneifel, Eric G. O'Rear
Homeowners and builders have increasingly strived to build low energy homes. As building materials, equipment, and methods have improved and renewable energy systems have become commonplace, the goal of net-zero energy homes has become technologically

The rheo-Raman microscope: Simultaneous chemical, conformational, mechanical, and microstructural measures of soft materials

October 4, 2016
Author(s)
Anthony P. Kotula, Matthew Meyer, Francesca De Vito, Jan Plog, Angela R. Hight Walker, Kalman D. Migler
We describe the design and demonstrate performance of an instrument capable of simultaneous Raman spectroscopy, rheology, and optical microscopy of materials. The instrument couples a Raman microscope with a rotational rheometer through an optically

Annual Manufacturing Report

October 3, 2016
Author(s)
Douglas Thomas
The purpose of this report is to track domestic manufacturing activity and its supply chain in order to develop a quantitative depiction of U.S. manufacturing in the context of the domestic economy and global industry. This depiction provides change agents

Determination of Closed Porosity in Rocks by Small-Angle Neuron Scattering

October 3, 2016
Author(s)
Jitendra Bahadur, Christian R. Medina, Lilin He, Yuri B. Melnichenko, John A. Rupp, Tomasz P. Blach, David F. Mildner
Small-angle neutron (SANS) and ultra small-angle neutron scattering (USANS) has been used to study a carbonate rock from a deep saline aquifer that is a potential candidate for storage reservoir for CO 2 sequestration. A new methodology is developed for

Impact of Hose Streams on Air Flows inside a Structure

October 3, 2016
Author(s)
Joseph M. Willi, Daniel M. Madrzykowski, Craig G. Weinschenk
Fire suppression tactics using hose streams can affect ventilation in a structure and may impact the movement of smoke and heat through a structure. Seven series of experiments were conducted to study the impact of different hose stream and nozzle movement

Introduction to CFTT and CFReDS Projects at NIST

October 3, 2016
Author(s)
Jungheum Park, James R. Lyle, Barbara Guttman
Along with the development and propagation of Information & Communication Technology (ICT), digital evidence becomes more common and crucial to solving various types of cases. In this environment, there have been a lot of activities to research and develop

Ionization potentials of superheavy elements No, Lr, and Rf and their ions

October 3, 2016
Author(s)
Vladimir A. Dzuba, M.S. Safronova, Ulyana I. Safronova, Alexander Kramida
We predict ionization potentials of superheavy elements No, Lr, and Rf and their ions using a relativistic hybrid method that combines con figuration interaction (CI) with the linearized coupled-cluster approach. Extensive study of the completeness of the

Using Absorption Cross Section to Predict Coherence Bandwidth and other Characteristics of a Reverberation Chamber Set-up for Wireless System Tests

October 3, 2016
Author(s)
Catherine A. Remley, Jos Dortmans, Damir Senic, Chih-Ming Wang, Christopher L. Holloway
We present a method to predict the coherence bandwidth, delay spread and power transfer function of a reverberation chamber set-up. The method is based on the absorption cross section of the absorbing material that is added to the chamber. With an S

Evolving Security

October 2, 2016
Author(s)
Edward Griffor
The topic of system security, and in particular that of cybersecurity differs in a critical way from the other concerns we have about systems. Though concerns like safety and resil- ience do have challenges associated with design, realization, and

Time in Cyber-Physical Systems

October 2, 2016
Author(s)
Marc A. Weiss, Sundeep Chandhoke, Hugh Melvin
Time is central to predicting, measuring and controlling properties of the physical world, and is one of the most important constraints distinguishing Cyber-Physical Systems from distributed computing in general. However mixing the cyber and the physical
Displaying 15176 - 15200 of 73697
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