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Displaying 1826 - 1850 of 1910

Heat Transfer in Supercritical Carbon Dioxide With Convective Boundary Conditions

January 1, 2001

Author(s)

Douglas A. Olson

We report measurements of heat transfer coefficients of flowing supercritical carbon dioxide (7.38 MPa critical pressure, 31.1 degrees C critical temperature) in a heated horizontal tube. The tube was 10.9 mm ID, was heated over 274 cm, and had an unheated

1,6-Hexanedithiol Monolayers on Au(111): A Multi-Technique Structural Study

December 29, 2000

Author(s)

T Leung, M Gerstenberg, D J. Lavrich, G Scoles, F Schreiber, G Poirier

… rectangular (p x √3) nets, where p are 4.24 ± 0.01 and 4.30 ± 0.01. These values of p correspond to spacings of (12.23 …

The Structure of O 3 -CH 4 and the Implications for the O + CH 4 Precursor-Initiated Reaction

August 1, 2000

Author(s)

Angela R. Hight Walker, Gerald T. Fraser, R D. Suenram, Francis J. Lovas

… geometry. The tunneling splitting is determined to be 30 MHz to 40 MHz, dependent on the CH 4 internal-rotor state. …

Reduced Gravity Combustion of Thermoplastic Spheres

January 1, 2000

Author(s)

Jiann C. Yang, Anthony P. Hamins, Michelle K. Donnelly

… the ambient oxygen concentration varied from 19% to 30% (by volume). The ignition system consisted of a pair of …

Bursting Bubbles From Combustion of Thermoplastic Materials in Microgravity.

May 18, 1999

Author(s)

Kathryn M. Butler

… the nylon fasteners, particle velocities were higher than 30 cm/sec. The droplets burned robustly until all fuel was …

Combustion of a Polymer (PMMA) Sphere in Microgravity (NISTIR 6331)

May 1, 1999

Author(s)

Jiann C. Yang, Anthony P. Hamins, Michelle K. Donnelly

… the ambient oxygen concentration varied from 19% to 30% (by volume). The ignition system consisted of a pair of …

Heat Transfer in Turbulent Supercritical Carbon Dioxide Flowing in a Heated Horizontal Tube

September 1, 1998

Author(s)

Douglas A. Olson, David W. Allen

Low noise thermistor read out for wideband room temperature infrared detectors

September 25, 2016

Author(s)

Ivan Ryger, Michelle S. Stephens, John H. Lehman, Matthew T. Spidell, Malcolm G. White, Nathan A. Tomlin, Dave Harber, Peter Lobotka

… Terahertz Waves, Coppenhagen, Denmark, 09/25/2016 to 09/30/2016 …

Continous Measurements of Air Change Rates in an Occupied House for One Year: The Effect of Temperature, Wind, Fans, and Windows

July 1, 2002

Author(s)

L A. Wallace, Steven Emmerich, Cynthia H. Reed

… small, with a very large temperature difference of 30 degrees C (54 degrees F) accounting for an increase in the … small, with a very large temperature difference of 30 degrees C (54 degrees F) accountin …

Separation of microplastics from deep-sea sediment using an affordable, simple to use, and easily accessible density separation device

August 14, 2024

Author(s)

Katherine Shaw, Rachel Sandquist, Cameron Fairclough, Jesse Black, Alex Fitzgerald, Scott Gallager, Jennifer Lynch

… mean recoveries of all fragments exceeded 78% (CR: 92.7% ± 30.8%, PP: 78.4% ± 34.0%, HDPE: 93.8% ± 13.5%, PS: 86.9% ± …

Direct-Laser-Written Polymer Nanowire Waveguides for Broadband Single Photon Collection from Epitaxial Quantum Dots into a Gaussian-like Mode

November 16, 2023

Author(s)

Edgar Perez, Cori Haws, Marcelo Davanco, Jindong Song, Luca Sapienza, Kartik Srinivasan

Single epitaxial quantum dots (QDs) are a leading technology for quantum light generation, particularly when they are embedded in photonic geometries that enhance their emission into a targeted and confined mode. However, coupling this mode into a

Occupational exposure and indoor environmental quality evaluation from operating multiple desktop 3D printers in an office environment within a library.

August 12, 2022

Author(s)

Jay L. Peterson, Kevin S. Dyrdahl, Stacy Bruss

… as the primary emission type, were generally stabilized at 30,000 to 60,000 particles per cubic centimeter above …

Seismic Behavior and Design of Deep, Slender Wide-Flange Structural Steel Beam-Columns

July 28, 2021

Author(s)

Piyachai Chansuk, Gulen Ozkula, Chia-Ming Uang, John Harris

Twenty-one W24 hot-rolled columns of ASTM A992 steel with five different sections were tested in Phase 1 of this research program to investigate the effects of slenderness parameters, constant axial load levels, lateral drift loading sequences, and weak

Gas vs Electric: Sustainability Performance of Heating Fuel Options in the NIST NZERTF

September 28, 2020

Author(s)

David H. Webb, Joshua D. Kneifel

… premium for net-zero energy performance. Over the 30- year study period, NZLCC-E saves the homeowner $34 063. …

Technology Development and Field Monitoring in nZEB

July 1, 2020

Author(s)

Vance (Wm.) Payne, Brian P. Dougherty

… that a 4F increase in thermostat settings can save 12 to 30% energy savings and therefore RoCo is a promising …

Structure and Dynamics of Ethane Confined in Silica Nanopores in the Presence of CO 2

February 28, 2020

Author(s)

Tingting Liu, Siddharth Guatam, David R. Cole, Sumant Patankar, David Tomasko, Wei Zhou, Gernot Rother

… cylindrical silica pores at three different pressures (30, 65, and 100 bar) at 323 K. Two Lorentzian functions were …

Development of an LC-APCI-MS Method for Determining Off-Flavor Compounds and its Application Towards Marine Recirculating Aquaculture System Monitoring and Evaluation of Aeration as a Depuration Approach

January 4, 2020

Author(s)

Mary Bedner, Keiko Saito

… The volatilization rates of both compounds were 30 % faster in salt water than in fresh water with or without …

Preliminary X-ray CT investigation to link Hounsfield unit measurements with the International System of Units (SI)

December 20, 2018

Author(s)

Zachary H. Levine, Adele P. Peskin, Andrew Holmgren, Edward J. Garboczi

… 120~kV, and 140~kV, on a medical XCT. The samples included 30 small plastic bottles of powders containing various …

Chemical Compound Classification by Elemental Signatures in Castle Dust Using SEM Automated X-ray Particle Analysis

August 1, 2018

Author(s)

Diana Ortiz-Montalvo, Edward P. Vicenzi, Nicholas W. Ritchie, Carol A. Grissom, Richard A. Livingston, Zoe Weldon-Yochim, Joseph M. Conny, Scott A. Wight

… times were 24 hours, and the volumetric flow rate was 30 L/min. Samples were collected near the Haupt Garden …

Simultaneous Neutron and X-Ray Imaging of 3D Structure of Organic Matter and Fracture in Shales

April 1, 2018

Author(s)

Wei-Shan NMN Chiang, Jacob M LaManna, Daniel S. Hussey, David L. Jacobson, Yun Liu, Jilin Zhang, Daniel T. Georgi, Jordan R. Kone, Jin-hong Chen

… in 2.5 cm diameter shales with resolution of about 30 υm and field of view of about 3 cm. In the reconstructed …

Safer and Greener Low-Rise Steel Structures Under Wind Loads Through Nonlinear Database-Assisted Design

February 19, 2017

Author(s)

Dat Duthinh, William P. Fritz

… By using NLDAD, improvement in wind resistance of 30 % was achieved, at the cost of 3.6 % increase in weight. …

Avian mercury exposure and toxicological risk across western North America: a synthesis

October 15, 2016

Author(s)

Joshua T. Ackerman, Collin A. Eagles-Smith, Mark P. Herzog, Alex Hartman, Sarah Peterson, David C. Evers, Allyson Jackson, John E. Elliott, Stacy Schuur, Colleen E. Bryan Sallee

Methylmercury contamination of the environment is an important issue globally and birds are useful bioindicators for mercury monitoring programs. We synthesized all of the available data on mercury contamination of birds in western North America. We

The DNA Damaging Potential of Photoactivated P25 Titanium Dioxide Nanoparticles

September 30, 2014

Author(s)

Elijah Petersen, Vytas Reipa, Stephanie S. Watson, Deborah Jacobs, Savelas A. Rabb, Bryant C. Nelson

… dose of  14.5 kJ/m2) for 24 h or UVA light at 370 nm for 30 min (energy dose of  10 kJ/m2), there is a significant …

Persistent organic pollutant concentrations in blubber of 16 species of cetaceans stranded in the Pacific Islands from 1997 through 2011

May 11, 2014

Author(s)

Melannie J. Bachman, Jennifer Lynch, Kristi West, Brenda Jensen

… have quantified POPs in stranded cetaceans within the last 30 years around the Hawaiian Islands. A suite of POPs was …

Performance Improvement of a Roof Top Air-Conditioning Unit by Refrigerant Circuitry Optimization

January 26, 2013

Author(s)

Sunil Lee, David A. Yashar, Piotr A. Domanski

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 with an

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