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Displaying 6126 - 6150 of 13218

Fiber Optic Based Optical Tomography Sensor for Monitoring Plasma Uniformity

February 1, 2001
Author(s)
Eric C. Benck, K Etemadi
… optical tomography sensor has been developed for potential in situ monitoring of plasma uniformity. Optical tomography … with only two small windows and acquire the necessary data in less than a second. Optical tomography is being tested on an ICP-GEC RF plasma source. Variations in plasma uniformity are measured as a function of different …

Measurement of Silicon Dioxide Film Thicknesses by X-ray Photoelectron Spectroscopy

February 1, 2001
Author(s)
Cedric J. Powell, Aleksander Jablonski
… the effects of elastic-electron scattering to be ignored in measurements of the thicknesses of overlayer films by … investigated the effects of elastic-electron scattering in measurements of thicknesses of SiO 2 films on Si from XPS … of elastic scattering along electron trajectories in the solid. The calculations simulated an angle-resolved …

Cluster Primary Ion Beam Secondary Ion Mass Spectrometry for Semiconductor Characterization

January 1, 2001
Author(s)
John G. Gillen, S V. Roberson, Albert J. Fahey, Marlon L. Walker, J Bennett, R Lareau
… 6 - have been used to analyze low energy arsenic implants in silicon, boron delta-doped structures, thin gate oxides, … resolution for silicon depth profiling and a reduction in sputter-induced topography for metals. For organic … the use of a cluster ion beam can give large improvements in yield for characteristic secondary ions and can minimize …

A Distributed Theory for Contactless Interconnects at Terahertz Frequencies

June 25, 2024
Author(s)
Nicholas Jungwirth, Bryan Bosworth, Aaron Hagerstrom, Meagan Papac, Eric Marksz, JEROME CHERON, Kassiopeia Smith, Angela Stelson, Ari Feldman, Dylan Williams, Nathan Orloff, Christian Long
… interconnects by comparing it to 3D full-wave simulations. In comparison to 3D simulations, the model offers insight … All the interconnects have less than 1 dB insertion loss in their first pass bands, highlighting the opportunity … waveguide, heterogeneous integration, millimeter-wave technology, bumpless, distributed circuit model …

Wind Effects on High-Rise Buildings: Database-Assisted Design Versus the High-Frequency Force-Balance Technique

February 19, 2017
Author(s)
M Iancovici, Michael A. Riley, Fahim H. Sadek, Emil Simiu
… (DAD) was originally developed for low-rise buildings. In this paper we show that it applies to flexible high-rise … and transparent. We illustrate the use of DAD and compare in a number of typical cases DAD results with results based … building technology, database-assisted design, high-frequency …

Wind Load Factors for Tall Building Design and the ASCE 7 Standard

February 19, 2017
Author(s)
Rene D. Gabbai, Emil Simiu
… Wind load factors incorporated in the ASCE 7 Standard are based on rough approximations of wind effects and the uncertainties inherent in them. These factors are routinely applied to tall building … factors for the de-sign of tall flexible buildings results in safety levels that can be significantly lower than safety …

Multicomponent Chemical Imaging of Pharmaceutical Solid Dosage Forms with Broadband CARS Microscopy

July 15, 2013
Author(s)
Christopher M. Hartshorn, Marcus T. Cicerone, Young J. Lee, Charles H. Camp, John M. Heddleston, Patrick Marsac, Tim Rhodes, Zhen Liu, Nicole Canfield
… active pharmaceutical ingredient (API) and was analyzed in a tabulated dosage form, embedded within commonly used excipients. In comparison with wide-field spontaneous Raman imaging, … resolution and spectral quality. The significant increase in imaging speed and spectral quality allowed identification …

Guidelines on Security and Privacy in Public Cloud Computing

December 9, 2011
Author(s)
Timothy Grance, Wayne Jansen
… to a certain extent, cloud computing remains a work in progress. This publication provides an overview of the … Computer Security and Privacy, public cloud, Information Technology Outsourcing, outsourcing … Guidelines on Security and Privacy in Public Cloud Computing …

Numerical Simulation of Along-Wind Loading on Small Structures Using a Simplified Wind Flow Model

November 10, 2010
Author(s)
Dong Hun Yeo
… reliable measurement of pressures on low-rise build-ings in the atmospheric boundary layer (ABL) flow remains a … of simulating low-frequency turbulent fluctuations in boundary-layer wind tunnels, es-pecially for relatively … coherence are equivalent to those induced by an increment in the mean wind speed. Preliminary measurements appear to …

Combinatorial Software Testing

August 7, 2009
Author(s)
David R. Kuhn, Raghu N. Kacker, Yu Lei, Justin Hunter
… level of t, can help find problems like this early in the testing life-cycle. …

Optimization and Multi-Hazard Design

July 6, 2009
Author(s)
Emil Simiu, Florian A. Potra
… There is a growing interest in the development of procedures for the design of structures … building technology, earthquake engineering, multi-hazard engineering, …

A Materials Science-Based Approach to Characterizing Fire Resistive Materials

April 9, 2009
Author(s)
Dale P. Bentz, Christopher C. White, Kuldeep R. Prasad, Daniel R. Flynn, Donald L. Hunston, Kar T. Tan
… of a slug calorimeter has been developed and standardized in the ASTM E37 Thermal Measurements committee. In addition to adequate thermophysical properties, adhesion … Adhesion, Building technology, Fire resistive material, Materials science, …

Early-Age Properties of Cement-Based Materials: I. Influence of Cement Fineness

July 9, 2008
Author(s)
Dale P. Bentz, G Sant, W Weiss
… measurements to listen for microcracking occurring in high performance w/c=0.35 mortars and dual-ring paste … strength within the construction industry may result in the specification of cements that are more prone to … Journal of Materials in Civil Engineering … autogenous deformation, building technology, cement-based materials, early-age cracking, …

REACT: Reducing Early-Age Cracking Today

June 1, 2008
Author(s)
Dale P. Bentz, W Weiss
… estimate from the industry places this as a $500 M problem in the U.S. alone, with some ready-mix companies experiencing … Autogenous deformation, building technology, early-age cracking, internal curing, plastic …

Fluid Dynamics Analysis of Channel Flow Geometries for Materials Characterization in Microfludic Devices

September 1, 2005
Author(s)
Frederick R. Phelan Jr., Steven Hudson, Matthew D. Handler
… of geometries for liquid state materials characterization in microfluidic devices are investigated. Numerical … offset fluid streams that produce a stagnation point in the center of the geometry. In the first class, the flow type is manipulated by changing … four roll mill, microfludics, nano-materials, nano-technology …

What Are Lighting Controls Protocols, and Why Does Anyone Care About Them?

July 31, 2003
Author(s)
Stephen J. Treado
… discussed. Key elements are power and flexibility, both in system design and implementation, and in operation. The overriding tred is towards ever-increasing … building automation systems, building environment, building technology, lighting controls, lighting equipment, lighting …

On the Mitigation of Early Age Cracking

January 1, 2002
Author(s)
Dale P. Bentz, M R. Geiker, O M. Jensen
… methods of mitigating autogenous strainsand stresses in cement mortars (w/s=0.35, 8 % silica fume) are compared: … autogenous shrinkage, building technology, cement, cracking, lightweight aggregate, …

Strength of an Interlocking FRP Connection

November 1, 2001
Author(s)
Dat Duthinh, K K. Bajpai
… fiber-reinforced polymer (FRP) connection was measured in bending, and in-plane and out-of-plane shear. This connection allows the … rapid assembly of FRP panels into houses, and can be used in interlocking mode only, or interlocking and adhesively … adhesive, bending, building technology, composite, connection, fiber-reinforced polymer, …

Large Eddy Simulation of Wood Combustion

September 19, 2001
Author(s)
Simo A. Hostikka, Kevin B. McGrattan
… The model is used to predict the full-scale flame spread in a room with wood linings. The performance of the model is … building technology, fire model, fire research, large eddy simulation, …

Linear Procedures for Structures with Velocity-Dependent Dampers

August 1, 2000
Author(s)
Fahim Sadek, B Mohraz, Michael A. Riley
… can absorb a portion of the earthquake-induced energy in structures and thus reduce the energy demand on structural members. Wide acceptance of these devices in structures will depend on the availability of simplified … (LSP) and linear dynamic (LDP) procedures recommended in the NEHRP Guidelines for the Seismic Rehabilitation of …

Fibers, Percolation, and Spalling of High-Performance Concrete

May 1, 2000
Author(s)
Dale P. Bentz
… concrete surface. This failure mode is rarely encountered in conventional concretes of higher w/c ratios. In these concretes, it is suggested that the interfacial … route for the vapor built up during the thermal exposure. In HPC, these ITZ regions are thinner and not percolated, but …

Ventilation, Energy and IAQ Impacts of Mechanical Ventilation in a U.S. Dwelling

August 1, 1999
Author(s)
Andrew K. Persily
… envelope construction, there has been increasing interest in mechanical ventilation of residential buildings in the United States. This paper reports on a simulation … impacts of several mechanical ventilation approaches in a single-family residential building. The study focuses on …
Displaying 6126 - 6150 of 13218
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