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You searched on: Author: william healy Sorted by: title

Displaying records 1 to 10 of 37 records.
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1. An Experimental Study of Interference Impacts on ZigBee-based Wireless Communications Inside Buildings
Published: 8/7/2010
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power wireless sensor networks. This standard takes full advantages of the IEEE 802.15.4 physical radio specification and operates in un ...

2. Assessment of Performance Metrics for Use of Wireless Sensor Networks in Buildings
Published: 9/30/2009
Authors: Won Suk Jang, William M Healy
Abstract: This paper is part of an effort to develop measurement systems and methods to better predict the performance of wireless sensor and control networks in building applications. Because of the variability in application requirements, the development of ...

3. Battery Discharge Characteristics of Wireless Sensors in Building Applications
Published: 4/11/2012
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: 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 ...

4. Design Challenges of the NIST Net Zero Energy Residential Test Facility
Series: Technical Note (NIST TN)
Report Number: 1847
Published: 3/26/2015
Authors: Betsy Pettit, Cathy Gates, Arthur Hunter Fanney, William M Healy
Abstract: Homeowners and builders have increasingly strived to build low energy use and environmentally friendly homes. As materials and equipment have improved, energy reduction as a goal has increasingly been replaced with the goal of net-zero energy use. ...

5. Design Concepts for a New Guarded Hot Plate Apparatus for Use Over an Extended Temperature Range
Published: 10/1/2002
Authors: D R Flynn, Robert R Zarr, Mahn-Hee Hahn, William M Healy
Abstract: The National Institute of Standards and Technology is building a new guarded hot plate apparatus (GHP) for use at temperatures from 90 K to 900 K, with provision to conduct tests in various gases at controlled pressures from 0.013 Pa to 0.105 MPa ({a ...

6. Detection of Moisture Accumulation in Wall Assemblies Using Ultra-Wideband Radio Signals
Published: 12/1/2004
Authors: William M Healy, E NMI van Doorn
Abstract: This paper discusses the use of ultra-wideband radio signals to detect moisture problems within building assemblies. Ultra-wideband signals are made up of a large spectrum of electromagnetic waves, and hardware is available to temporally resolve the ...

7. Detection of Moisture Accumulation in Wall Assemblies Using Ultra-Wideband Radio Signals.
Published: 12/5/2004
Authors: William M Healy, E Vandoorn
Abstract: This paper discusses the use of ultra-widehand radio signals near 5 GHz to detect moisture problems within building assemblies. Ultra-widehand signals are made up of a large spectrum of electromagnetic waves, and hardware is available to temporally r ...

8. Development of an Optical Fiber-Based Moisture Sensor for Building Envelopes
Published: 10/1/2003
Authors: William M Healy, S Luo, M Evans, A Sucheta, Y Liu
Abstract: Optical fiber-based moisture sensors have been developed to help detect moisture problems in building envelopes. The sensors are created with a coating on a long period grating that is written onto optical fiber. As the coating absorbs moisture fro ...

9. Effect of Temperature Stratification Near Heating Elements on the Measured Energy Factors of Electric Water Heaters
Published: 6/2/2008
Author: William M Healy
Abstract: Two different models of 190 L (50 gallon) residential electric water heaters were tested to investigate problems that arise in determining their energy efficiencies due to the steep temperature gradient near the lower heating element. This gradient ...

10. Energy Performance Sensitivity of a Net-Zero Energy Home to Design and Use Specifications
Published: 2/2/2015
Authors: Joshua D Kneifel, William M Healy, James J Filliben, Matthew T Boyd

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