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Electronics

Sensors

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Displaying 201 - 225 of 710

Wireless Sensor Network Performance Metrics for Building Applications

April 1, 2010
Author(s)
Won Suk Jang, William M. Healy
Metrics are investigated to help assess the performance of wireless sensors in buildings. Wireless sensor networks present tremendous opportunities for energy savings and improvement in occupant comfort in buildings by making data about conditions and

Interoperability Test of IEEE 1451.5 Standard-Based Wireless Sensors

March 13, 2010
Author(s)
Kang B. Lee, Yuyin Song
The Institute of Electrical and Electronics Engineers (IEEE) 1451 standard provides plug-and-play capability of smart transducers (sensors and actuators). Plug-and-play is an important aspect of interoperability, which is the ability of two or more systems

An Interoperability Test System for IEEE 1451.5-802.11 Standard

February 25, 2010
Author(s)
Eugene Song, Kang B. Lee
Interoperability is the ability of systems or software applications to communicate with each other. Interoperability testing verifies that systems can work together based on a standard protocol in an operational environment. This paper introduces an

Magnetic Noise in a Low-Power Picotesla Magnetoresistive Sensor

October 25, 2009
Author(s)
Stephen E. Russek, Lu Yuan, Sean Halloran, Fabio C. da Silva, David P. Pappas, John M. Moreland, Sy-hwang Liou, Rui Zhang
We present a design of a low power, compact, magnetoresistive sensor. The key features of the design are(1) decreasing the noise by the use of a 64 element magnetic tunnel junction (MTJ) bridge,(2) reducing the magnetic noise by annealing the MTJ sensors

A Standards-based Global Ocean Monitoring System

August 16, 2009
Author(s)
Eugene Song, Kang B. Lee
This paper describes a standards-based global ocean monitoring system developed at the National Institute of Standards and Technology (NIST) with collaborating partners. This system adapts the Institute of Electrical and Electronics Engineers (IEEE) 1451

Generating and Using Data of Higher Dimension for Gas-Phase Chemical Sensing

May 29, 2009
Author(s)
Baranidharan Raman, Joshua L. Hertz, Kurt D. Benkstein, Douglas C. Meier, Casey Mungle, Stephen Semancik
Methods to acquire and analyze rich data streams from sensors are helpful, if not required, to track chemical components within complex gas-phase environments. We describe a MEMS-based microsensor technology that populates multi-element arrays with

Instrument Interface Standards for Interoperable Ocean Sensor Networks

May 11, 2009
Author(s)
Kang B. Lee, Yuyin Song, Thomas O'Reilly, K. Headley, D. Edgington, C. Rueda, J. Zedlitz , J. Del Rio, E. Delory, S. Fairgrieve, L. Bermudez
The utility and cost-effectiveness of large scale instrument networks are enhanced by instrument interoperability. Today s oceanographic instruments are characterized by very diverse non-standard software protocols and data formats. This diversity of

Sensor Alert Web Service for IEEE 1451-Based Sensor Networks

May 7, 2009
Author(s)
Kang B. Lee, Yuyin Song
This paper describes the Sensor Alert Web Service (SAWS) for the Institute of Electrical and Electronics Engineers (IEEE) 1451-based sensor networks developed at the National Institute of Standards and Technology (NIST). The SAWS consists of the Sensor

CMOS Microhotplate Technology for Chemical and Biological Agent Detection

March 16, 2009
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Elliott cooper-Balis, Stephen Semancik, Jon C. Geist, Alim A. Fatah
In this paper we describe microhotplates that can serve as platforms for gas sensors of potential use for homeland security and other gas sensing applications. A brief review of the fabrication of microhotplate precursors in a CMOS-compatible technology

Integration of IEEE 1451 Smart Transducers and OGC-SWE Using STWS

February 17, 2009
Author(s)
Yuyin Song, Kang B. Lee
This paper describes the integration of IEEE 1451 smart transducers and Open Geospatial Consortium -Sensor Web Enablement (OGC-SWE) using the Smart Transducer Web Service (STWS). An integration architecture and a prototype system are presented. The

Ultra-high resolution alpha particle spectroscopy using calorimetry

September 23, 2008
Author(s)
Robert D. Horansky, Joel N. Ullom, James A. Beall, Gene C. Hilton, Kent D. Irwin, Don Dry, Beth Hastings, Stephen Lamont, Clifford R. Rudy, Michael W. Rabin
Calorimetry has been used since the late 1700?s to measure the heat output of physical processes ranging from chemical reactions to the respiration of organisms . Calorimetry is performed by measuring the temperature change caused by heat release into a

Operation of an X-ray transition-edge sensor cooled by tunnel junction refrigerators

January 19, 2008
Author(s)
Nathan A. Tomlin, James A. Beall, Gene C. Hilton, Kent D. Irwin, Galen O'Neil, Dan Schmidt, Leila R. Vale, Joel Ullom
We demonstrate successful cooling of an X-ray transition-edge sensor (TES) using solid-state refrigerators based on normal-metal/insulator/superconductor (NIS) tunnel junctions. Above the TES transition temperature (Tc), we use Johnson noise thermometry to

Coupling Nanowire Chemiresistors With Microhotplate Platforms for Advanced Gas Sensing

August 6, 2007
Author(s)
Douglas C. Meier, Stephen Semancik, Bradley Button, Eugene Strelcov, Andrei Kilmakov
Recent advances in nanotechnology have yielded new materials and structures that offer great potential for improving sensitivity, selectivity and stability of the next generation of chemical gas sensors. To successfully fabricate practical devices, the

Work Function Characterization of TaSiN and TaCN Electrodes Using CV, IV, IPE and SKPM

November 1, 2006
Author(s)
Hao Xiong, Nhan V. Nguyen, Joseph J. Kopanski, John S. Suehle, Eric M. Vogel
Work function of TaSiN (TaCN) films on HfO2 or SiO2 gate dielectrics is investigated for the first time using a combination of Capacitance?Voltage, Fowler?Nordheim tunneling, internal Photoemission, and scanning Kelevin probe microscopy methods, which

Spindle Health Diagnosis Based on Analytic Wavelet Enveloping

September 1, 2006
Author(s)
Li Zhang, Robert Gao, Kang B. Lee
A new diagnostic technique for identifying structural defects in spindles was developed, based on the analytic wavelet transform. The new technique extracts defect-induced impulses from the spindle vibration signal and constructs their envelopes in a

Wavelet-Based Enveloping for Spindle Health Diagnosis

May 1, 2005
Author(s)
Li Zhang, Robert Gao, Kang B. Lee
A new method for identifying structural defect-induced vibration signals was developed based on the analytic wavelet transform. The advantage of this method is that it extracts defect-related impulse signal and constructs its envelope in a single step

Time-Division Superconducting Quantum Interference Device Multiplexer for Transition-Edge Sensors

August 1, 2003
Author(s)
Piet DeKorte, Joern Beyer, Steven Deiker, Gene C. Hilton, Kent D. Irwin, Michael MacIntosh, Sae Woo Nam, Carl D. Reintsema, Leila R. Vale, Martin Huber
We report on the design and performance of our second-generation 32-channel time-division multiplexer developed for the read-out of large-format arrays of superconducting transition-edge sensors. We present design issues and measurement results on its gain
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