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Displaying records 21 to 30 of 122 records.
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21. Development of a Quantum-Voltage-Calibrated Noise Thermometer at NIM
Topic: Energy
Published: 9/11/2013
Authors: Jifeng Qu, Samuel Paul Benz, Jianqiang Zhang, Horst Rogalla, Yang Fu, Alessio Pollarolo, Jintao Zhang
Abstract: A quantum-voltage-calibrated Johnson-noise thermometer was developed at NIM, which measures the Boltzmann constant k through comparing the thermal noise across a 100  sense resistor at the temperature of the triple point water to the comb-lik ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910779

22. Johnson-noise thermometry based on a quantized-voltage noise source at NIST
Topic: Energy
Published: 9/11/2013
Authors: Alessio Pollarolo, Tae H. Jeong, Samuel Paul Benz, Paul David Dresselhaus, Horst Rogalla, Weston Leo Tew
Abstract: Johnson Noise Thermometry is an electronic approach to measuring temperature. For several years, NIST has been developing a switching-correlator-type Johnson-noise thermometer that uses a quantized voltage noise source as an accurate voltage referenc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910730

23. Absolute spectral responsivity measurements of solar cells by a hybrid optical technique
Topic: Energy
Published: 7/15/2013
Authors: Behrang H Hamadani, John F Roller, Brian P Dougherty, Fiona Persaud, Howard W Yoon
Abstract: An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913725

24. Flat Frequency Response in the Electronic Measurement of the Boltzmann Constant
Topic: Energy
Published: 6/1/2013
Authors: Jifeng Qu, Horst Rogalla, Yang Fu, Jianqiang Zhang, Alessio Pollarolo, Samuel Paul Benz
Abstract: A new quantum voltage calibrated Johnson noise thermometer (JNT) was developed at NIM to demonstrate the electrical approach that determines the Boltzmann constant k by comparing electrical and thermal noise power. A measurement with an integration p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911739

25. Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor
Topic: Energy
Published: 6/1/2013
Authors: Alessio Pollarolo, Tae H. Jeong, Samuel Paul Benz, Horst Rogalla
Abstract: In 2010, NIST measured the Boltzmann constant k with an electronic technique that measured the Johnson noise of a 100 Ω resistor at the triple point of water (TPW) and used a voltage waveform synthesized with a quantized voltage noise source (QV ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911711

26. A focused super-continuum solar simulator for illuminated solar cell microscopy
Topic: Energy
Published: 5/12/2013
Author: Tasshi Dennis
Abstract: The design and application of a novel, focused solar simulator based on a high-power, super-continuum laser is described. We used the simulator to create micrometer-scale spatial maps of full-spectrum optical beam induced current (FS-OBIC) in sam ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913473

27. Towards Demand Response Measurement and Verification Standards
Topic: Energy
Published: 5/1/2013
Authors: David G Holmberg, David Hardin, Ed Koch
Abstract: The value and impact of demand response (DR) at grid-scale depends upon the widespread and active participation of a diverse customer base. The level of participation by customers is impacted by financial compensation and return-on-investment. The ro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912834

28. Strategies to Achieve Net-Zero Energy Homes: A Framework for Future Guidelines Workshop Summary Report
Series: Special Publication (NIST SP)
Report Number: 1140
Topic: Energy
Published: 4/5/2013
Author: Nancy A McNabb
Abstract: The National Institute of Standards and Technology (NIST) Measurement Science Roadmap for Net-Zero Energy Buildings Workshop Report (NIST TN 1660 ‹ March 2010) identified a number of broad challenges to achieving NZE high-performance green buildi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911717

29. An Apparatus for Concurrent Measurement of Thermoelectric Material Parameters
Topic: Energy
Published: 1/29/2013
Authors: Raymond L. (Ray) Kallaher, Cory Alexander Maximilian Latham, Fred Sharifi
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912101

30. Performance Improvement of a Roof Top Air-Conditioning Unit by Refrigerant Circuitry Optimization
Topic: Energy
Published: 1/26/2013
Authors: Sunil Lee, David A Yashar, Piotr A Domanski
Abstract: In this experiment-aided simulation study, we achieved the performance improvement of a Roof Top Unit (RTU) by optimizing an evaporator‰s refrigerant circuitry using evolutionary algorithms. The system used in this study was a 2-stage 7.5 Ton RTU wit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912072



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