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Electronics

Sensors

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Displaying 176 - 200 of 710

Dynamic Key Refreshment for Smart Grid Mesh Network Security

February 24, 2013
Author(s)
Hamid Gharavi
This paper presents a dynamically updating key distribution strategy to enhance mesh network security against cyber attacks. The scheme has been applied to two security protocols known as Simultaneous Authentication of Equals (SAE) and Efficient Mesh

ITRS Chapter: MEMS

January 30, 2013
Author(s)
Michael Gaitan
The ITRS has organized a MEMS Technology Working Group (TWG), which has developed a new chapter on MEMS for its 2011 report. The report focuses on MEMS technologies associated with mobile Internet devices, such as smartphones and tablet computers. These

A titanium-nitride near-infrared kinetic inductance photon-counting detector and its anomalous electrodynamics

October 1, 2012
Author(s)
Martin O. Sandberg, Fabio C. da Silva, Kent D. Irwin, David P. Pappas, Sae Woo Nam, David Wisbey, Ben Mazin, Seth Meeker, Jonas Zmuidzinas, Henry G. Leduc
We demonstrate single-photon counting at 1550 nm with titanium-nitride (TiN) microwave kinetic inductancedetectors. Full-width-at-half-maximum energy resolution of 0.4 eV is achieved. 0-, 1-, 2- photon events are resolved and shown to follow Poisson

MEMS-based universal fatigue test technique

August 22, 2012
Author(s)
Li-Anne Liew, David T. Read, Nicholas Barbosa
We have developed a MEMS (micro electro mechanical systems) -based method for fatigue testing of micro- to millimeter-sized specimens of any material (hence ‘universal’). The miniature, re- usable, stand-alone fatigue test frame is fabricated as a single

Battery Discharge Characteristics of Wireless Sensors in Building Applications

April 11, 2012
Author(s)
Wenqi Guo, William M. Healy, Mengchu Zhou
Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective in the

MEMS

January 12, 2012
Author(s)
Michael Gaitan
Micro-Electro-Mechanical Systems (MEMS) are devices that are fabricated using techniques similar to those used for integrated circuits (ICs) to create micrometer-sized mechanical structures (suspended bridges, cantilevers, membranes, fluid channels, etc.)

Predictive Gold Nanocluster Formation Controlled by Metal-Ligand Complexes

January 9, 2012
Author(s)
John M. Pettibone, Jeffrey W. Hudgens
The formation of ligand-protected transition metal nanoclusters in size-selective syntheses is driven by the inherent properties of the protecting ligands. We have previously reported the selective, monodisperse product formation of phosphine protected Au

MICROHOTPLATE TEMPERATURE SENSOR CALIBRATION AND BIST

January 3, 2012
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist
In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate thermal resistance (thermal efficiency) and the thermal voltage from an integrated platinum-rhodium

Discovery of giant magnetostriction in annealed Co1-xFex thin-films

November 1, 2011
Author(s)
Dwight Hunter, William Alexander Osborn, Ke Wang, Nataliya Kazantseva, Jason Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Sam E. Lofland, Manfred Wuttig, Ichiro Takeuchi
Chemical and structural heterogeneity and resulting interaction of coexisting phases can lead to extraordinary behaviors in oxides as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. But such phenomena are

Calorimetric Sensors

April 15, 2011
Author(s)
Richard E. Cavicchi
The calorimetric gas sensor has evolved from a simple metal hot wire to a modern device fabricated using micromachining techniques. The principle of operation is to detect the heat evolved from combustible gases on the sensor surface. While the most widely

Analysis of high-Q, gallium nitride nanowire resonators in response to deposited thin films

January 1, 2011
Author(s)
J. R. Montague, M. Dalberth, J. M. Gray, D. Seghete, Kristine A. Bertness, S M. George, Victor M. Bright, Charles T. Rogers, Norman Sanford
Gallium nitride nanowires (GaN-NWs) are systems of interest for mechanical resonance-based sensors due to their small mass and, in the case of c-axis NWs, high mechanical quality (Q) factors of 10,000-100,000. We report on singly-clamped NW mechanical

Al-Mn Transition Edge Sensors for Cosmic Microwave Background Polarimeters

November 22, 2010
Author(s)
Daniel R. Schmidt, Hsiao-Mei Cho, Johannes Hubmayr, Peter J. Lowell, Michael D. Niemack, Galen C. O'Neil, Joel N. Ullom, Ki W. Yoon, Kent D. Irwin, W L. Holzapfel, M Lueker, E M. George, E Shirokoff
Superconducting transition edge sensors (TES) require superconducting films with transition temperatures (Tc)and properties that can be tailored to the particular requirements of individual applications. We have been developing Al-Mn films with a tunable

Al-Mn transition edge sensors for cosmic microwave background polarimeters

November 22, 2010
Author(s)
Daniel R. Schmidt, Hsiao-Mei Cho, Johannes Hubmayr, Peter J. Lowell, Michael D. Niemack, Galen C. O'Neil, Joel N. Ullom, Ki W. Yoon, Kent D. Irwin
Superconducting transition edge sensors (TES) require superconducting films with transition temperatures (Tc)and properties that can be tailored to the particular requirements of individual applications. We have been developing Al-Mn films with a tunable

An Analytical Model for Pulse Shape and Electrothermal Stability in Two-Body Microcalorimeters

September 9, 2010
Author(s)
Douglas A. Bennett, Robert D. Horansky, Daniel R. Schmidt, Daniel S. Swetz, Leila R. Vale, Joel N. Ullom, Andrew Hoover, Michael W. Rabin, Nathan J. Hoteling
High resolution superconducting gamma-ray sensors show potential for the more accurate analysis of nuclear material. These devices are part of a larger class of microcalorimeters and bolometers based on transition edge sensors (TESs) that have two distinct

Quantum-Based SI Traceable Electric-Field Probe

July 25, 2010
Author(s)
Joshua A. Gordon, Christopher L. Holloway, Steven R. Jefferts, Thomas P. Heavner
We are presently investigating the feasibility of developing a technique that will allow direct traceable microwave electric field (E-field) measurements. The new approach is based on atomic rf-resonance spectroscopy, where an applied electrical field

IEEE 1451.5 STANDARDS-BASED WIRELESS SENSOR NETWORKS

July 1, 2010
Author(s)
Eugene Song, Kang B. Lee
Recent advances in wireless communications, networking, electronics, and microprocessors have enabled the development of low-cost, low-power wireless sensor nodes. Wireless sensor networks have become more widely used to monitor the condition of the

Code-division SQUID multiplexing

April 23, 2010
Author(s)
Michael D. Niemack, Kent D. Irwin, Joern Beyer, Hsiao-Mei Cho, William B. Doriese, Gene C. Hilton, Carl D. Reintsema, Daniel R. Schmidt, Joel N. Ullom, Leila R. Vale
Multiplexed superconducting quantum interference device (SQUID) readout systems are a critical technology for measuring large arrays of superconducting transition-edge sensor (TES) detectors. Current successful SQUID multiplexing architectures are
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