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Search Publications

NIST Authors in Bold

Displaying 6951 - 6975 of 13218

Admission Control and Scheduling of Isochronous and Asynchronous Traffic in IEEE 802.11ad MAC

June 20, 2023
Author(s)
Anirudha Sahoo, Pu Tian, Tanguy Ropitault, Steve Blandino, Nada T. Golmie
… periods. Hence, admission control plays an important role in an IEEE 802.11ad system. In an earlier work we studied admission control only for isochronous requests. In this paper, we present admission control and scheduling … IEEE Vehicular Technology Conference (VTC-2023 Spring) …

Stray light characterization in a high-resolution imaging spectrometer designed for solar-induced fluorescence

April 22, 2021
Author(s)
David W. Allen, Loren Albert, James Kellner, Yuqin Zong, Katherine Cushman, Luis Alonso
… fluorescence (SIF), an emission of light from chlorophyll in plants that can be used to study photosynthesis. Imaging … oxygen, and also within numerous solar Fraunhofer lines in atmospheric windows not obscured by oxygen or water … Stray light characterization in a high-resolution imaging spectrometer designed for …

Unraveling Low Abundance Intimate Mixtures with Deep Learning

May 14, 2019
Author(s)
Ronald G. Resmini, Kevin Christiansen, David Allen
… very low abundance, subpixel quantities of solid materials in nonlinear/intimate mixtures are still significant … (Nd2O3). A microscene is a hyperspectral image measured in a laboratory. Several hundred thousand labeled spectra are easily and rapidly generated in one HSI cube of a microscene. Individual Petri dishes of …

Experimentally, How Does Cu TSV Diameter Influence its Stress State?

May 27, 2015
Author(s)
Chukwudi A. Okoro, Lyle E. Levine, Yaw S. Obeng, Ruqing Xu
… In this work, an experimental study of the influence of Cu … studied; 3 µm, 5 µm and 8 µm, all of which were fabricated in a single chip. Prior to the measurements, the die was … microstructure. The measured mean hydrostatic stresses in the Cu TSV were 185±14 MPa (3 µm Cu TSV diameter), 147±10 …

An analysis of the nonlinear spectral mixing of didymium and soda-lime glass beads using hyperspectral imagery (HSI) microscopy

June 13, 2014
Author(s)
Ronald G. Resmini, Robert S. Rand, Christopher Deloye, David W. Allen
… (VNIR; 400 nm to 900 nm) HSI microscopy image cubes (in reflectance) of intimate mixtures of the two materials are … beads of didymium glass and soda-lime glass both ranging in particle size from 63 m to 125 m. Mixtures are generated … (and the two endmembers) are constructed and emplaced in the wells of a 96-well sample plate: 0%/100%, 25%/75%, …

Non-contact Conductance Measurement of Nanosize Objects using Reasonant Cavity

May 15, 2014
Author(s)
Jan Obrzut, Nathan D. Orloff, Oleg A. Kirillov
… therefore their electrical characteristics are important in the materials development and production. Non-contact measurement is performed in WR-90 waveguide configuration in the X-band frequency band from 6 GHz to 12 GHz. The … 2014 IEEE International Instrumentation and Measurement Technology …

QKD on a Board Limited by Detector Rates in a Free-Space Environment

August 25, 2013
Author(s)
Alan Mink, Joshua Bienfang
… pipelined algorithms and controlled data flow implemented in a field-programmable gate array. This eliminates … such as key management and system monitoring. Operating in a laboratory setting, we tested the QKD boards up to their … low-link-loss, high-count-rate conditions, timing jitter in the single-photon detectors imposed critical limitations …

Use of RF-Based Technique as a Metrology Tool for TSV Reliability Analysis

May 28, 2013
Author(s)
Chukwudi A. Okoro, Yaw S. Obeng, Jan Obrzut, Pavel Kabos, Klaus Hummler
… In this work, we used radio frequency (RF) based measurement … (TSV) stacked dies. It was found that RF signal integrity in TSV daisy chains degraded with thermal cycling. Similar … Proceeding of IEEE Electronic Components and Technology Conference (ECTC) …

X-Ray Micro-Beam Diffraction Determination of Full Stress Tensors in Cu TSVs

May 28, 2013
Author(s)
Chukwudi A. Okoro, Lyle E. Levine, Oleg A. Kirillov, Yaw S. Obeng, Ruqing Xu, Jonathan Z. Tischler, Wenjun Liu, Klaus Hummler
… depth resolved determination of the full stress tensor in Cu through-silicon vias (TSVs), using synchrotron based … other without (uncapped). Both Cu TSVs were found to be in a state of tensile hydrostatic stress that fluctuated … hydrostatic stresses is attributed to local differences in their microstructure, and not to the differences in …

A microscene approach to the evaluation of hyperspectral system level performance

May 18, 2013
Author(s)
David W. Allen, Ronald G. Resmini, Christopher Deloye
… abundance requires an understanding of the many factors in the end-to-end remote sensing scenario from scene to … capture the range of variability that materials display in a natural setting. We propose one alternative to numerical … use of compact hyperspectral imagers that can be used in the laboratory to measure materials in a 'microscene' …

An Analysis of the Probability Distribution of Spectral Angle and Euclidean Distance in Hyperspectral Remote Sensing Using Microspectroscopy

May 18, 2013
Author(s)
Ronald G. Resmini, Christopher Deloye, David W. Allen
… to 900 nm) HSI microscopy data of small fragments (1.25 cm in size) of minerals are presented. HSI microscopy, also … of fields of view ranging from centimeters to millimeters in size. It is imaging spectrometry but at a small spatial … The aforementioned metrics are derived for the spectra in an ROI of individual mineral fragments; across ROIs of …

Near-field Calibration of an Objective Spectrophotometer to NIST Radiometric Standards for the Creation and Maintenance of Standard Stars for Ground- and Space-Based Applications

September 13, 2012
Author(s)
John T. Woodward IV, Keith R. Lykke, Claire E. Cramer, John T. McGraw, Peter Zimmer, Daniel C. Zirzow, Susana Deustua, Dean Hines
… detector. To provide continuous NIST calibration of AESoP in the field a near-identical, removable 100mm diameter … wavelength- by-wavelength at 1nm spectral resolution. In the field, CAL is used in a near-field configuration to calibrate AESoP. Between … Modern Technologies in Space- and Ground-based Telescopes and Instrumentation …

Effect of Thermal Cycling on the Signal Integrity and Morphology of TSV Isolation Liner-SiO2

July 30, 2012
Author(s)
Chukwudi A. Okoro, Yaw S. Obeng
… a good metrology tool for the detection of discontinuities in the SiO2 isolation liner. Signal degradation is found to … (AFM) analysis revealed that void formation and growth in the SiO2 isolation liner is the root cause for this … 2012 IEEE International Interconnect Technology Conference - IITC …

Lithography and Chemical Modeling of Acid Amplfiers for Use in EUV Photoresists

July 28, 2011
Author(s)
Kirstin Kruger, craig higgins, Gregg M. Gallatin, Robert Brainard
… resolution, line edge roughness (LER), and sensitivity all in EUV resists is to increase the number of acid molecules generated per absorbed photon. In previous work, we showed that acid amplifiers (AAs) … the amount of acid generated from each EUV photon. In this paper, we show that AAs can simultaneously give …

On The Magnitude of Random Telegraph Noise in Ultra-Scaled MOSFETs

May 2, 2011
Author(s)
Kin P. Cheung, Jason P. Campbell
… to examine the impact of RTN without the influence of RDE. In this work, we experimentally verify the “hole in the inversion layer” model of RTN and then use it to examine the magnitude of RTN in ultra-scaled devices without the influence of RDE. This … International Conference on Integrated Circuit Design & Technology …

Intercomparison of Methods for Detecting and Characterizing Voids in Bonded Wafer Pairs

October 1, 2010
Author(s)
Richard A. Allen, Andrew C. Rudack, David T. Read, Winthrop A. Baylies
… evaluate methods for identifying and characterizing voids in bonded wafer pairs for three-dimensional integrated … of post-bonding voids than other bonding applications. In addition, 3D ICs will likely be more sensitive to small voids than other bond applications. In this round robin experiment eight approaches to void …

Autonomous Migration with Admission Control for Mobiles Affected by Access Network Failures

June 18, 2009
Author(s)
David W. Griffith
… to perform an unanticipated hard handover, resulting in disrupted connections. The users connected to the failed … APs. This paper quantifies the effect of limited capacity in target APs when multiple isplaced users attempt to connect … the ILP's performance to that of a distributed approach in which each user migrates to the AP to which it is closest. …

A Comparative Analysis of BGP Anomaly Detection and Robustness Algorithms

January 28, 2009
Author(s)
Kotikalapudi Sriram, Oliver Borchert, Patrick Gleichmann, Douglas C. Montgomery
… have been proposed and/or prototyped recently. They differ in the anomaly situations which they attempt to alert or mitigate, and also in the type(s) of data they use. Some are based on registry … TERRAIN (Testing and Evaluation of Routing Robustness in Assurable Inter-domain Networking) on which these …

Development of Infrared Scene Projectors for Fire Fighter Cameras

March 2, 2008
Author(s)
Joseph P. Rice, Jorge E. Neira, Francine K. Amon
… two types of infrared scene projectors for hardware-in-the-loop testing of thermal imaging cameras such as those used by fire-fighters. In one, direct projection, images are projected directly into the camera. In the other, indirect projection, images are projected onto …

A Standard Intelligent System Ontology

June 27, 2006
Author(s)
Craig I. Schlenoff, R Washington, Anthony J. Barbera, C Manteuffel
… The level of automation in combat vehicles being developed for the Army?s objective … Army?s legacy force. This automation is taking many forms in emerging vehicles; varying from operator decision aides to … that a well-trained crew would operate these systems in a manner to accomplish the tactical mission assigned to …

The Relation between Crystalline Phase, Electronic Structure and Dielectric Properties in High-K Gate Stacks

September 28, 2005
Author(s)
Safak Sayan, Mark Croft, Nhan Van Nguyen, Tom Emge, James R. Ehrstein, Igor Levin, John S. Suehle, Robert A. Bartynski, Eric Garfunkel
… As high permittivity dielectrics approach use in metal-oxide-semiconductor field effect transistor (MOSFET) … First principles calculations are used to help in assigning valence band maxima and conduction band minima. … and hole transfer. It is shown that crystal structure in ultrathin ZrO2 films has considerable effects on …

Electric Current Induced Thermomechanical Fatigue Testing of Interconnects

March 1, 2005
Author(s)
Robert Keller, Roy H. Geiss, Yi-Wen Cheng, David T. Read
… density, we used controlled Joule heating to simulate in an accelerated manner the type of low frequency thermal … The thermal stresses are caused by differences in thermal expansion properties between the metal and … 100 K, and corresponding cyclic stress amplitude in excess of 100 MPa for Al-1Si and Cu lines on oxidized …
Displaying 6951 - 6975 of 13218
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