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Displaying 5501 - 5525 of 13218

Infrared measurement of the temperature at the tool-chip interface while machining Ti-6Al-4V

November 29, 2016
Author(s)
Jarred C. Heigel, Eric P. Whitenton, Brandon M. Lane, M A. Donmez, Wilfredo Moscoso-Kingsley, Vis Madhavan
… conductivity of titanium alloys and the heat generated in the primary shear zone and at the tool-chip interface. … frame rate (700 Hz) and large field of view (20 mm^2) used in this study enable the temperature distribution of the … m/rev and cutting speeds between 20 m/min and 100 m/min. In addition to the temperature measurements, cutting forces …

Horizontal Convective Boiling of R448A, R449A, and R452B within a Micro-Fin Tube

August 3, 2016
Author(s)
Mark A. Kedzierski, Donggyu Kang
… This paper presents local convective boiling measurements in a micro-fin tube for three low global warming potential … refrigerant R452B exhibited the highest heat transfer, in large part due to its approximate 28% larger liquid … 26% and 48% less than that of R404A for the example case. In contrast, the model predicts that the R452B heat transfer …

In-Situ Metrology to Characterize Water Vapor Delivery during Atomic Layer Deposition

May 2, 2016
Author(s)
Tariq Ahmido, William A. Kimes, Brent A. Sperling, Joseph T. Hodges, James E. Maslar
… Water is often employed as the oxygen source in metal oxide atomic layer deposition (ALD) processes. It has been reported that variations in the amount of water delivered during metal oxide ALD can … The development of rapid, quantitative techniques for in situ water vapor measurements during ALD processes would …

The chemical, mechanical, and physical properties of 3-D printed materials composed of TiO2-ABS nanocomposites

March 1, 2016
Author(s)
Zeeshan Ahmed, Matthew Skorski, Jake Esenther, Abigail E. Miller, Hartings Mathew
… experiments suggest that ABS undergoes minor degradation in the presence of TiO2 during the different processing … are among the first to display chemical reactivity in nanocomposites that are printed using commercial 3-D … others who seek to incorporate catalytic nanoparticles in 3- D printed structures. …

Uranium Ion Yields from Monodisperse Uranium Oxide Particles

February 24, 2016
Author(s)
Nicholas E. Sharp, John D. Fassett, David S. Simons
… ion mass spectrometry (SIMS) plays an important role in nuclear forensics through its ability to identify isotopic … particles on silicon wafers with O- and O2 , a sudden drop in U+ signal intensity was observed which was not present … primary ion species for particles on graphite. This drop in U+ signal intensity occurred simultaneously with an …

Indoor Air Quality in High-Performing Building Case Studies: Got Data?

May 12, 2015
Author(s)
Kevin Y. Teichman, Andrew K. Persily, Steven J. Emmerich
… In this paper, we review how indoor air quality (IAQ) has been addressed in case studies of high-performing buildings (HPBs), specifically the case studies described in ASHRAE’s “High Performing Buildings” magazine. We find … Science and Technology for the Built Environment …

Interactions of Higher Order Tip Effects in CD-AFM Linewidth Metrology

April 30, 2015
Author(s)
Ronald G. Dixson, Boon Ping Ng, Xavier Bonnaud, Ndubuisi G. Orji
… A major challenge in critical dimension atomic force microscope (CD-AFM) width … for the effects of the tip on the apparent features in an image. The overall effect of the tip is to broaden the … this effect can be well-modeled as a constant bias in width measurements, independent of the specific feature …

Building a Spring-Transport Mechanism for Spinning Rotor Gauges

April 3, 2015
Author(s)
James A. Fedchak, Julia K. Scherschligt, Makfir Sefa, Nick Phandinh
… rotor gauges (SRGs) are widely used as transfer standards in inter-laboratory comparisons and as secondary standards by calibration laboratories. In both of these applications, it is necessary to ship the … is a device used to immobilize the SRG and keep it in vacuum during transport. This shop-note describes the …

HVACR Editorial for IAQ 2013 Special Issue

January 23, 2015
Author(s)
Hal Levin, Steven Emmerich
… The papers in this issue were selected from presentations made at the ASHRAE IAQ 2013: Environmental Health in Low Energy Buildings conference held in Vancouver Canada in October 2013. The conference was held … Science and Technology for the Built Environment …

Gain and Loss in active waveguides based on lithographically defined quantum dots

June 1, 2014
Author(s)
Kevin L. Silverman, Luis Miaja Avila, Varun B. Verma, Richard P. Mirin, James J. Coleman
… dots. Lasing action has previously been demonstrated in a nominally identical structure. Measurements are made by … is insufficient for ground state lasing to be achieved in a structure with as-cleaved facets, but the gain per dot is comparable with that demonstrated in self- assembled quantum dots. …

Hydrogen traps in the outgassing model of a stainless steel vacuum chamber

March 31, 2014
Author(s)
Robert F. Berg
… geometry of the chamber components, the hydrogen dissolved in those components, and the processes of diffusion, … object. 2. The hydrogen initially dissolved in each component was described as a uniform concentration. … values were used to describe diffusion and recombination in stainless steel types 304 and 316 [Grant et al., J. …

Top-Down Fabrication of Large-Area GaN Micro and Nano Pillars

February 19, 2014
Author(s)
Albert Davydov, Ratan K. Debnath, B. Wen, Dipak Paramanik, Abhishek Motayed, M. King
… measurements reveled significant strain relaxation in 250 nm diameter etched pillars as compared to 10 um … due to plasma etch can be removed by subsequent etching in KOH-ethylene glycol solution. Post plasma etch chemical … and nano-disks of GaN, which could be potentially useful in nitride-based resonators and lasers. …

Modeling a Nationwide Public Safety Broadband Network

June 1, 2013
Author(s)
Richard A. Rouil, Antonio Izquierdo Manzanares, Michael R. Souryal, Camillo Gentile, David W. Griffith, Nada T. Golmie
… challenges of modeling and planning for a country diverse in terms of terrain, user density, and public safety needs. … and site assumptions) can be readily assessed in a timely fashion. The approach utilizes a clustering … IEEE Transactions on Vehicular Technology …

Formation of large-area GaN nanostructures with controlled geometry and morphology using top-down fabrication scheme.

June 26, 2012
Author(s)
Dipak Paramanik, Abhishek Motayed, Geetha G. Aluri, Sergiy Krylyuk, Albert Davydov
… We found that nitrogen plays a significant role in fabricating high quality etched GaN nanostructures. In this paper we present the effects of variations of the … erosion, and surface roughness. Dominant etch mechanisms in relation to the observed characteristics of the etched …

Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions

May 23, 2012
Author(s)
Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C. Benck
… of plasma radiation and ions with 193nm PR and 248nm PR in Ar plasma by in-situ ellipsometry. Ellipsometry provides valuable information on changes in film thickness and material optical properties in … Journal of Vacuum Science and Technology B …

Development of a combinatorial characterization scheme for high-throughput investigations of hydrogen storage materials.

December 16, 2011
Author(s)
Jason Hattrick-Simpers, Z. Tan, H. Oguchi, Chun Chiu, Edwin J. Heilweil, James E. Maslar, Leonid A. Bendersky
… In order to reliably increase the throughput of materials … measures the hydrogen storage properties of materials in quantities ranging from 10 nanogram to 1 g. Initial … properties probed via parallel in situ Raman spectroscopy. Final confirmation of the … Science and Technology of Advanced Materials …

Formation and transfer of GaAsN nanostructure layers

September 27, 2011
Author(s)
Christopher L. Soles, Hyun W. Ro, A. Wood, N. Estrada, B. Dick, Y. Wang, Micheal Thouless, Rachel Goldman
… (approaching the exciton Bohr radius) embedded in a solid-state matrix have great potential for … nanocrystallites with various functional substrates. In particular, we achieved simultaneous nanostructuring and … Journal of Vacuum Science and Technology A …
Displaying 5501 - 5525 of 13218
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