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− | **''N. Gopalsami, T. W. Elmer, S. Liao, R. Ahern, A. Heifetz, A. C. Raptis, M. Luessi, D. Babacan and A. K. Katsaggelos, "Compressive sampling in passive millimeter-wave imaging", Proc. SPIE 8022, 80220I (2011); {{DOI|10.1117/12.886998}}. (Purchase published version)<br /><br />Copyright 2011 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.'' | + | **''N. Gopalsami, T. W. Elmer, S. Liao, R. Ahern, A. Heifetz, A. C. Raptis, M. Luessi, D. Babacan and A. K. Katsaggelos, "Compressive sampling in passive millimeter-wave imaging", Proc. SPIE 8022, 80220I (2011); DOI: {{DOI|10.1117/12.886998}}. (Purchase published version)<br /><br />Copyright 2011 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.'' |
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Revision as of 15:54, 1 February 2012
The following is a list of publications by Thomas W Elmer II, in reverse order by date.
Contents
- 1 Journal Articles
- 1.1 Microwave Remote Sensing of Ionized Air
- 1.2 A Real-time Heart Rate Analysis for a Remote Millimeter Wave I-Q Sensor
- 1.3 Remote Sensing of Heart Rate and Patterns of Respiration Using 94 GHz Millimeter Wave Interferometry
- 1.4 Visual Measurement of Suture Strain for Robotic Surgery
- 1.5 Data Analysis Algorithms for Flaw Sizing Based on Eddy Current Rotating Probe Examination of Steam Generator Tubes.
- 1.6 Application of millimeter-wave radiometry for remote chemical detection.
- 2 Conference papers
- 2.1 Compressive sampling in passive millimeter wave imaging
- 2.2 Passive millimeter wave imaging and spectroscopy system for terrestrial remote sensing.
- 2.3 Millimeter wave sensor for far-field standoff vibrometry.
- 2.4 Surface Plasmon THz Resonators for Security Applications
- 2.5 Development of flaw sizing algorithms for eddy current rotating probes.
- 2.6 Passive millimeter wave sensor for remote chemical detection.
- 2.7 A millimeter-wave radiometer for terrestrial remote sensing of chemical plumes.
- 2.8 Remote detection of chemicals with passive millimeter waves.
- 2.9 A computer-aided analysis tool for flaw sizing based on eddy current inspection data.
- 2.10 Microwave dielectric spectroscopy of gases.
- 2.11 Analysis of Cerrobend Activation Produced by a 250-MeV Medical Proton Accelerator
- 3 Other
- 4 Citations
- 5 Pending
- 5.1 Nuclear Radiation-Induced Atmospheric Air Breakdown in a Spark Gap
- 5.2 Passive Millimeter-Wave Dual-Polarization Imagers
- 5.3 Compact Millimeter Wave Sensor for Remote Monitoring of Vital Signs
- 5.4 Development of Ultrasonic Waveguide Techniques for Under-Sodium Viewing
- 5.5 Compressive Passive Millimeter-Wave Imaging
- 5.6 Standoff Through-the-Wall Sensing at Ka Band
- 5.7 Compressive sampling in active and passive millimeter-wave imaging
- 5.8 Remote Sensing of Patterns of Cardiac Activity Using Statistical Methods and Non-Linear Optimization
- 5.9 Passive millimeter wave imaging with compressive sensing
- 6 Other Media
- 7 Rejected
- 8 To Do
Journal Articles
Microwave Remote Sensing of Ionized Air
- Type: Full Length Journal Article
- Authors: S. Liao*, N. Gopalsami, A. Heifetz, T. Elmer, P. Fiflis, E. R. Koehl, H. T. Chien, and A. C. Raptis
- Published In: IEEE Geoscience and Remote Sensing Letters
- Volume: 8
- Issue: 4
- Pages: 617 - 620
- Issue Date: Jul. 2011
- DOI: 10.1109/LGRS.2010.2098016
- Abstract:
- We present observations of microwave scattering from ambient room air ionized with a negative ion generator. The frequency dependence of the radar cross section of ionized air was measured from 26.5 to 40 GHz (Ka-band) in a bistatic mode with an Agilent PNA-X series (model N5245A) vector network analyzer. A detailed calibration scheme is provided to minimize the effect of the stray background field and system frequency response on the target reflection. The feasibility of detecting the microwave reflection from ionized air portends many potential applications such as remote sensing of atmospheric ionization and remote detection of radioactive ionization of air.
- Download:
- © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
- download article
A Real-time Heart Rate Analysis for a Remote Millimeter Wave I-Q Sensor
- Type: Full Length Journal Article
- Authors: Bakhtiari, S.; Liao, S.; Elmer II, T.; “Sami” Gopalsami , N.; Raptis, A. C.;
- Published In: IEEE Transactions on Biomedical Engineering
- Volume: 58
- Issue: 6
- Pages: 1839 - 1845
- Issue Date: Jun. 2011
- DOI: 10.1109/TBME.2011.2122335
- Abstract:
- This article analyzes Heart Rate (HR) information from physiological tracings collected with a remote millimeter wave (mmW) I-Q sensor for biometric monitoring applications. A parameter optimization method based on the nonlinear Levenberg-Marquardt (LM) algorithm is used. The mmW sensor works at 94 GHz and can detect the vital signs of a human subject from a few to tens of meters away. The reflected mmW signal is typically affected by respiration, body movement, background noise and electronic system noise. Processing of the mmW radar signal is thus necessary to obtain the true HR. The down-converted received signal in this case consists of both the real part (I-branch) and the imaginary part (Q-branch), which can be considered as the cosine and sine of the received phase of HR signal. Instead of fitting the converted phase angle signal, the method directly fits the real and imaginary parts of the HR signal, which circumvents the need for phase unwrapping. This is particularly useful when the signal-to-noise ratio (SNR) is low. Also the method identifies both beat-to-beat HR and individual heartbeat magnitude, which is valuable for some medical diagnosis applications. The mean HR here is compared to that obtained using the Discrete Fourier Transform (DFT).
- Download:
- © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
- download article
Remote Sensing of Heart Rate and Patterns of Respiration Using 94 GHz Millimeter Wave Interferometry
- Type: Full Length Journal Article
- Authors: Mikhelson, I. V.;Bakhtiari, S.;Elmer, II, T. W.;Sahakian, A. V.
- Submitted To: IEEE Transactions on Biomedical Engineering
- Published In: IEEE Transactions on Biomedical Engineering
- Volume: 58
- Issue: 6
- Pages: 1671 - 1677
- Issue Date: Jun. 2011
- DOI: 10.1109/TBME.2011.2111371
- Abstract
- Using continuous wave, 94 GHz millimeter-wave interferometry, a signal representing chest wall motion can be obtained that contains both the heart rate and respiration patterns of a human subject. These components have to be separated from each other in the received signal. Our method was to use the quadrature and in-phase components of the signal, after removing the mean of each, to find the phase, unwrap it, and convert it to a displacement measurement. Using this, the power spectrum was examined for peaks, which corresponded to the heart rate and respiration rate. The displacement waveform of the chest was also analyzed for discrete heartbeats using a novel wavelet decomposition technique.
- Download:
- © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
- download article
Visual Measurement of Suture Strain for Robotic Surgery
- Type: Full Length Journal Article
- Authors: John Martell, Thomas Elmer, Nachappa Gopalsami, and Young Soo Park
- Published in: Computational and Mathematical Methods in Medicine (formerly Journal of Theoretical Medicine)
- Volume: 2011
- Article ID: 879086
- Accepted: 5 January 2011
- DOI: 10.1155/2011/879086
- Abstract:
- Minimally invasive surgical procedures offer advantages of smaller incisions, decreased hospital length of stay, and rapid postoperative recovery to the patient. Surgical robots improve access and visualization intraoperatively and have expanded the indications for minimally invasive procedures. A limitation of the DaVinci surgical robot is a lack of sensory feedback to the operative surgeon. Experienced robotic surgeons use visual interpretation of tissue and suture deformation as a surrogate for tactile feedback. A difficulty encountered during robotic surgery is maintaining adequate suture tension while tying knots or following a running anastomotic suture. Displaying suture strain in real time has potential to decrease the learning curve and improve the performance and safety of robotic surgical procedures. Conventional strain measurement methods involve installation of complex sensors on the robotic instruments. This paper presents a noninvasive video processing-based method to determine strain in surgical sutures. The method accurately calculates strain in suture by processing video from the existing surgical camera, making implementation uncomplicated. The video analysis method was developed and validated using video of suture strain standards on a servohydraulic testing system. The video-based suture strain algorithm is shown capable of measuring suture strains of 0.2% with subpixel resolution and proven reliability under various conditions.
- Download:
- John Martell, Thomas Elmer, Nachappa Gopalsami, and Young Soo Park, “Visual Measurement of Suture Strain for Robotic Surgery,” Computational and Mathematical Methods in Medicine, vol. 2011, Article ID 879086, 9 pages, 2011. doi:10.1155/2011/879086
Copyright © 2011 John Martell et al. This is an open access article distributed under the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. - download article
- John Martell, Thomas Elmer, Nachappa Gopalsami, and Young Soo Park, “Visual Measurement of Suture Strain for Robotic Surgery,” Computational and Mathematical Methods in Medicine, vol. 2011, Article ID 879086, 9 pages, 2011. doi:10.1155/2011/879086
Data Analysis Algorithms for Flaw Sizing Based on Eddy Current Rotating Probe Examination of Steam Generator Tubes.
- Type: Full Length Conf. Paper
- Date Cleared: 10/14/2009, 06/18/2009 (abstract)
- Authors: Bakhtiari, S.;Elmer, T. W.
- Conference: 6th Canadian Nuclear Society International Steam Generator Conference (program)
- Location: Toronto, Ontario, Canada
- Conference Date: Nov. 8, 2009 - Nov. 11, 2009
- Presented: Paper 5.13, Wed, Nov 11, 15:05
- Report No.: ANL/NE/CP-65290
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 65290, 64504 (abstract)
- Download:
Application of millimeter-wave radiometry for remote chemical detection.
- Type: Full Length Journal Article
- Date Cleared: 08/09/2007
- Authors: Gopalsami, N.;Bakhtiari, S.;Elmer, T. W.;Raptis, A. C.
- Submitted To: IEEE Trans. on Microwave Theory Tech.
- Published In: IEEE Trans. on Microwave Theory Tech.
- Volume: 56
- Issue: 3
- Pages: 700-709
- Issue Date: Mar. 2008
- DOI: 10.1109/TMTT.2008.916985
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 59825
- Download:
- ©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
- The following article appeared in IEEE Transactions on Microwave Theory and Techniques, vol 56, Number 3, pp 700-709 and may be found at http://ieeexplore.ieee.org.
- DOI: 10.1109/TMTT.2008.916985
- download article
- Citations:
- "Microwave Photonic Noise Source From Microwave to Sub-Terahertz Wave Bands and Its Applications to Noise Characterization". Ho-Jin Song; Shimizu, N; Kukutsu, N; Nagatsuma, T; Kado, Y. IEEE Transactions on Microwave Theory and Techniques. Volume: 56, Issue: 12, Part 1. Pp 2989-2997.
- "Novel Terahertz Sources and Applications to Security". S. G. Biedron, et al.
- "Passive Millimeter-Wave Microscopy". Nozokido, T.; Noto, M.; Murai, T. Microwave and Wireless Components Letters, IEEE. Volume: 19, Issue: 10. Pp 638-640
- "Millimeter wave detection of nuclear radiation: An alternative detection mechanism". N. Gopalsami, H. T. Chien, A. Heifetz, E. R. Koehl, and A. C. Raptis. Rev. Sci. Instrum. Volume: 80, Issue: 8.
Conference papers
Compressive sampling in passive millimeter wave imaging
- Type: Full Length Conf. Paper
- Date Cleared: 11/10/2010
- Authors: N. Gopalsami, T. Elmer, S. Liao, R. Ahern, A. Heifetz, A. C. Raptis, M. Luessi and A. Katsaggelos
- Conference: SPIE Defense, Security, and Sensing 2011, Conference DS202: Passive Millimeter Wave Imaging Technology XIV
- Location: Orlando World Center Marriott Resort & Convention Center, Orlando, Florida, USA.
- Conference Date: 2011 Apr 25-29
- Affiliations
- ANL Divisions: NE
- Non-ANL Affil.: Northwestern Univ.
- Keynumbers
- ANL Publications #: 68401
- Abstract:
- We present a Hadamard transform based imaging technique and have implemented it on a single-pixel passive millimeter-wave imager in the 146-154 GHz range. The imaging arrangement uses a set of Hadamard transform masks of size p × q at the image plane of a lens and the transformed image signals are focused and collected by a horn antenna of the imager. The cyclic nature of Hadamard matrix allows the use of a single extended 2-D Hadamard mask of size (2p-1) × (2q-1) to expose a p × q submask for each acquisition by raster scanning the large mask one pixel at a time. A total of N = pq acquisitions can be made with a complete scan. The original p × q image may be reconstructed by a simple matrix operation. Instead of full N acquisitions, we can use a subset of the masks for compressive sensing. In this regard, we have developed a relaxation technique that recovers the full Hadamard measurement space from sub-sampled Hadamard acquisitions. We have reconstructed high fidelity images with 1/9 of the full Hadamard acquisitions, thus reducing the image acquisition time by a factor of 9.
- Download:
- N. Gopalsami, T. W. Elmer, S. Liao, R. Ahern, A. Heifetz, A. C. Raptis, M. Luessi, D. Babacan and A. K. Katsaggelos, "Compressive sampling in passive millimeter-wave imaging", Proc. SPIE 8022, 80220I (2011); DOI: 10.1117/12.886998. (Purchase published version)
Copyright 2011 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. - Download Article (Author version)
- N. Gopalsami, T. W. Elmer, S. Liao, R. Ahern, A. Heifetz, A. C. Raptis, M. Luessi, D. Babacan and A. K. Katsaggelos, "Compressive sampling in passive millimeter-wave imaging", Proc. SPIE 8022, 80220I (2011); DOI: 10.1117/12.886998. (Purchase published version)
Passive millimeter wave imaging and spectroscopy system for terrestrial remote sensing.
- Type: Full Length Conf. Paper
- Date Cleared: 03/04/2010
- Authors: Gopalsami, N. Liao, S. Elmer, T. W. Koehl, E. R. Heifetz, A. Chien, H. T. Raptis, A. C.
- Conference: SPIE Defense, Security and Sensing 2010 (DSS 2010)
- Location: Orlando, FL
- Conference Date: Apr. 5-9, 2010
- Report No.: ANL/NE/CP-66398
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 66398
- Abstract:
- We have built a passive millimeter wave imaging and spectroscopy system with a 15-channel filter bank in the 146-154 GHz band for terrestrial remote sensing. We had built the spectroscopy system first and have now retrofitted an imaging element to it as a single pixel imager. The imaging element consisted of a 15-cm-diameter imaging lens fed to a corrugated scalar horn. Image acquisition is carried out by scanning the lens with a 2-axis translation stage. A LabVIEW-based software program integrates the imaging and spectroscopy systems with online display of spectroscopic information while the system scans each pixel position. The software also allows for integrating the image intensity of all 15 channels to increase the signal-to-noise ratio by a factor of ~4 relative to single channel image. The integrated imaging and spectroscopy system produces essentially 4-D data in which spatial data are along 2 dimensions, spectral data are in the 3rd dimension, and time is the 4th dimension. The system performance was tested by collecting imaging and spectral data with a 7.5-cm-diameter and 1m long gas cell in which test chemicals were introduced against a liquid nitrogen background.
- Download:
- Nachappa Gopalsami, Shaolin Liao, Eugene R. Koehl, Thomas W. Elmer, Alexander Heifetz, Hual-Te Chien, Apostolos C. Raptis, "Passive Millimeter Wave Imaging and Spectroscopy System for Terrestrial Remote Sensing," Passive Millimeter-Wave Imaging Technology XIII, David A. Wikner, Arttu R. Luukanen, Editors, Proc. of SPIE Vol. 7670, 767003 (2010).
Copyright 2009 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
http://dx.doi.org/10.1117/12.850123 (Purchase published version) - download Article (Author version)
- Nachappa Gopalsami, Shaolin Liao, Eugene R. Koehl, Thomas W. Elmer, Alexander Heifetz, Hual-Te Chien, Apostolos C. Raptis, "Passive Millimeter Wave Imaging and Spectroscopy System for Terrestrial Remote Sensing," Passive Millimeter-Wave Imaging Technology XIII, David A. Wikner, Arttu R. Luukanen, Editors, Proc. of SPIE Vol. 7670, 767003 (2010).
Millimeter wave sensor for far-field standoff vibrometry.
- Type: Full Length Conf. Paper
- Date Cleared: 09/05/2008, 05/12/2008 (abstract)
- Authors: Bakhtiari, S.;Gopalsami, N.;Elmer, T. W.;Raptis, A. C.
- Conference: 35th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2008)
- Location: Chicago, IL
- Conference Date: Jul. 20, 2008 - Jul. 25, 2008
- Report No.: ANL/NE/CP-62458
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 62458, 61637 (abstract)
- Associated Project Reference #: 2007-113-R1, 03887-00 (abstract)
- Download:
- Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
- The following article appeared in AIP Conference Proceedings, vol 1096, "Review of Quantitative Nondestructive Evaluation", pp 1641-1648 and may be found at http://link.aip.org/link/?apc/1096/1641.
- DOI: 10.1063/1.3114155
- download article
Surface Plasmon THz Resonators for Security Applications
- Type: Full Length Conf. Paper
- Date Cleared:
- Authors: Gopalsami, N; Chien, HT; Elmer, T II; Bakhtiari, S; and Raptis, AC
- Conference: 35th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2008)
- Location: Chicago, IL
- Conference Date: Jul. 20, 2008 - Jul. 25, 2008
- Report No.:
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #:
- Associated Project Reference #:
- Download:
- Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
- The following article appeared in AIP Conference Proceedings, vol 1096, "Review of Quantitative Nondestructive Evaluation", pp 1641-1648 and may be found at http://link.aip.org/link/?apc/1096/440.
- DOI: 10.1063/1.3114276
- download article
Development of flaw sizing algorithms for eddy current rotating probes.
- Type: Abstract Conf. Paper
- Date Cleared: 04/22/2008
- Authors: Bakhtiari, S.;Elmer, T. W.
- Conference: EPRI 27th Steam Generator NDE Workshop
- Location: Palm Desert, CA
- Conference Date: Jul. 21, 2008 - Jul. 23, 2008
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 61543
Passive millimeter wave sensor for remote chemical detection.
- Type: Full Length Public Comm. (Award Entry)
- Date Cleared: 03/13/2007
- Authors: Gopalsami, N.;Bakhitari, S.;Raptis, A.;Elmer, T.
- Submitted To: R&D Magazine (R&D100 Awards)
- DVD to accompany entry
- Affiliations
- ANL Divisions: NE;OTT;TSD
- Keynumbers
- ANL Publications #: 58677
A millimeter-wave radiometer for terrestrial remote sensing of chemical plumes.
- Type: Full Length Conf. Paper
- Date Cleared: 11/30/2006, 04/12/2007
- Authors: Bakhtiari, S.;Gopalsami, N.;Elmer, T.;Raptis, A. C.
- Conference: 3rd International Conference on Electromagnetic Near-Field Characterization and Imaging (ICONIC 2007)
- Location: St. Louis, MO
- Conference Date: Jun. 27, 2007 - Jun. 29, 2007
- Report No.: ANL/NE/CP-57949, ANL/NE/CP-58996
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 57949, 58996
- Misc: Used as the source for the magazine article #Covert Plant Detection
Remote detection of chemicals with passive millimeter waves.
- Type: Full Length Conf. Paper
- Date Cleared: 09/25/2006, 04/07/2006 (abstract)
- Authors: Gopalsami, N.;Bakhtiari, S.;Elmer, T.;Raptis, A. C.
- Conference Sponsor: DOE
- Conference: SPIE Conference on Chemical and Biological Sensors for Industrial and Environmental Monitoring (program, abstracts)
- Location: Boston, MA
- Conference Date: Oct. 3, 2006 - Oct. 4, 2006
- Report No.: ANL/NE/CP-119279
- Affiliations
- ANL Divisions: ET
- Keynumbers
- ANL Publications #: 57409, 56082 (abstract)
- Other ID #s: 119279
- Download
- N. Gopalsami*, S. Bakhtiari, T. W. Elmer, and A. C. Raptis, "Remote Detection of Chemicals with Passive Millimeter Waves," Chemical and Biological Sensors for Industrial and Environmental Monitoring II, Steven D. Christesen, Arthur J. Sedlacek III, James B. Gillespie, Kenneth J. Ewing, Editors, PProc. of SPIE Vol. 6378, 63781A, (2006).
Copyright 2009 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
http://dx.doi.org/10.1117/12.690212 (Purchase published version) - Download Article (Author version)
- N. Gopalsami*, S. Bakhtiari, T. W. Elmer, and A. C. Raptis, "Remote Detection of Chemicals with Passive Millimeter Waves," Chemical and Biological Sensors for Industrial and Environmental Monitoring II, Steven D. Christesen, Arthur J. Sedlacek III, James B. Gillespie, Kenneth J. Ewing, Editors, PProc. of SPIE Vol. 6378, 63781A, (2006).
- Other Links
- (ISBN 0-8194-6476-7)
A computer-aided analysis tool for flaw sizing based on eddy current inspection data.
- Type: Full Length Other
- Date Cleared: 07/07/2005, 04/01/2005 (abstract)
- Authors: Bakhtiari, S.;Kupperman, D. S.;Elmer, T. W.
- Conference Sponsor: EPRI/NRC
- Conference: 24th Annual EPRI Steam Generator NDE Workshop
- Location: San Diego, CA
- Conference Date: Jul. 11, 2005 - Jul. 13, 2005
- Affiliations
- ANL Divisions: ET
- Keynumbers
- ANL Publications #: 53859, 53004 (abstract)
- Other ID #s: 116561, 115802 (abstract)
- Abstract
- Progress to date is reported on the development of a computer-aided data analysis tool for sizing of potential flaws in steam generator tubes based on eddy-current inspection data. This work was carried out at Argonne National Laboratory as part of the activities under the Iinternational Steam Generator Tube Integrity Program, which is sponsored by the United States Nuclear Regulatory Commission. A MATLAB-based graphical user interface (GUI) and the associated software have been implemented for off-line manipulation of eddy-current inspection data collected with standard test instruments and acquisition software. Both one- and two-dimensional data may be analyzed once they are converted into proper format. Data segments can be superimposed for simulating first-order interaction of signals with nearby artifacts and noise. Various routines developed earlier at Argonne for the processing of rotating pancake coil data have been incorporated into the software. Additional routines have also been developed to allow processing of data from other probes that are used for field inspections. The initial focus of this work is on automatic sizing of flaws using +Point™ data. The ultimate goal is to be able to compare the estimates of flaw size based on data from different probes. The GUI provides a convenient tool for the evaluation of user-developed algorithms. New scripts can be linked and executed using the interface dialogue box. The results may be examined at any stage of the process by using the available measurement and visualization options.
Microwave dielectric spectroscopy of gases.
- Type: Full Length Conf. Paper
- Date Cleared: 06/28/2000
- Authors: Elmer, T. W.;Gopalsami, N.
- Conference Sponsor: Mid-American Chinese American Professionals Association;FNAL;Motorola Inc.;DePaul Univ.;Lucent Tech.
- Conference: 16th International Conference on Advanced Science and Technology 2000 (ICAST 2000) (program)
- Location: Batavia, IL
- Conference Date: Jun. 3, 2000
- Proceedings Title: Proc.
- Proceedings Citation: edited by J.-C. Chern,pp. 55-58
- Proceedings Date: 2000
- Report No.: ANL/ET/CP-102208
- Affiliations
- ANL Divisions: ET
- Keynumbers
- ANL Publications #: 36438
- Other ID #s: 102208, P45289
- Citations:
Analysis of Cerrobend Activation Produced by a 250-MeV Medical Proton Accelerator
- Type: Full Length Conf. Paper
- Date: 1997
- Authors: I. Rouse, M. Martz, C. Glisson, J. Siebers, T. Elmer, II
- Conference: 30th Midyear Meeting: "Health Physics of Radiation-Generating Machines"
- Sponsor: Health Physics Society
- Location: San Jose, CA
Other
Application of computerized data screening to automated analysis of bobbin probe inspection data from SG mock-up.
- Type: Conf. Presentation
- Date Cleared: 04/19/2010 (Abstract)
- Authors: Bakhtiari, S. Elmer, T. W. Shack, W. J.
- Conference: EPRI 29th Annual Steam Generator Workshop
- Location: Vail, CO
- Conference Date: Jul. 12, 2010 - Jul. 13, 2010
- Affiliations
- ANL Divisions: NE
- Keynumbers
- ANL Publications #: 66605
Covert Plant Detection
- Type: Magazine Article
- Magazine: Nuclear Engineering International
- Issue: November 2007
- Pages: 18-19
- Based on: #A millimeter-wave radiometer for terrestrial remote sensing of chemical plumes.
Millimeter-wave radar sensing of airborne chemicals.
- Type: Full Length Journal Article
- Date Cleared: 07/30/2099
- Authors: Gopalsami, N.;Raptis, A. C.
- (T Elmer III [sic] is listed in the Acknowledgment section, since I created the plots for the paper.)
- Submitted To: IEEE Trans. Microwave Theory Tech.
- Published In: IEEE Trans. Microwave Theory Tech.
- Volume: 49
- Issue: 4
- Pages: 646-53
- Issue Date: Apr. 2001
- DOI: 10.1109/22.915438
- Affiliations
- ANL Divisions: ET
- Keynumbers
- ANL Publications #: 33492
- Other ID #s: 099679, P45245
Citations
Pending
Nuclear Radiation-Induced Atmospheric Air Breakdown in a Spark Gap
- Type: Full Length Journal Article
- Authors: S. Liao, N. Gopalsami, E. R. Koehl, T. W. Elmer, A. Heifetz, H-T. Chien, and A. C. Raptis
- Submitted To: IEEE Transactions on Plasma Science
- Status: Accepted 2012.01.30
- Abstract
- We have investigated the effect of pre-ionization by a radioactive 137Cs γ-ray source on the atmospheric air breakdown conditions in a high-voltage spark gap. A decrease in breakdown threshold was observed with an increase of radiation dose. We attribute this to a space charge controlled electron diffusion process in a cloud of radiation induced ion species of both polarities. The space charge dependent diffusion coefficient was determined from the measurement data. In addition, we found that the breakdown process shows random spikes with Poisson-like statistical feature. These findings portend the feasibility of remote detection of nuclear radiation using high power mmW beam.
Passive Millimeter-Wave Dual-Polarization Imagers
- Type: Full Length Journal Article
- Authors: Nachappa "Sami" Gopalsami, Shaolin Liao, Thomas Elmer, Eugene Koehl, Alexander Heifetz, Keenan Avers, Eric Dieckman, Appostolos Raptis [sic]
- Submitted To: IEEE Transactions on Instrumentation and Measurement
- Status: Accepted
- Abstract
- We have developed two passive millimeter-wave(mmW)imagers for terrestrial remote sensing: one is an integrated imaging and spectroscopy system in the 146-154 GHz range with 16 channels of 500 MHz bandwidth each and the other is a single channel dual polarized imaging radiometer in the 70-100 GHz range. The imaging in both systems is implemented through translation of a 15cm Gaussian dielectric imaging lens. We compared the outdoor images of objects like car, vegetation, sky, and ground by both the systems under various weather conditions including clear, cloudy and rainy times. Ray-tracing simulation with radiative transfer equation was used to quantify the polarization diversity of the acquired images.
Compact Millimeter Wave Sensor for Remote Monitoring of Vital Signs
- Type: Full Length Journal Article
- Authors: Sasan Bakhtiari*, Thomas W. Elmer, Nicholas M. Cox, Nachappa Gopalsami, Appostolos C. Raptis, Shaolin Liao, Ilya Mikhelson, and Alan V. Sahakian
- Submitted To: IEEE Transactions on Instrumentation and Measurement
- Status: Accepted
- Abstract:
- A compact millimeter wave (MMW) sensor has been developed for remote monitoring of human vital signs (heart and respiration rate). The low-power homodyne transceiver operating at 94 GHz was assembled by using solid-state active and passive block-type components and can be battery operated. A description of the MMW system front-end and the back-end acquisition hardware and software is presented. Representative test case results on the application of various signal processing and data analysis algorithms developed to extract faint physiological signals of interest in presence of strong background interference are provided. Although the laboratory experiments so far have been limited to standoff distances of up to fifteen meters, the upper limit of the detection range is expected to be higher. In comparison to its microwave counterparts, the MMW system described here provides higher directivity, increased sensitivity, and longer detection range for measuring subtle mechanical displacements associated with heart and respiration functions. The system may be adapted for use in a wide range of standoff sensing applications including for patient health care, structural health monitoring, nondestructive testing, biometric sensing, and remote vibrometry in general.
Development of Ultrasonic Waveguide Techniques for Under-Sodium Viewing
- Type: Full Length Journal Article
- Authors: Ke Wang, Hual-Te Chien, Thomas W. Elmer, William P. Pawrence, David M. Engel, and Shuh-Haw Sheen
- Submitted to: NDT&E International
- Status: Submitted 2011.06, being reviewed
Compressive Passive Millimeter-Wave Imaging
- Type: Full Length Conference Paper
- Authors: Sevket Derin Babacan, Martin Luessi, Leonidas Spinoulas, Aggelos K. Katsaggelos, Nachappa Gopalsami, Thomas Elmer, Ryan Ahern, Shaolin Liao, Apostolos Raptis
- Prepared for: 2011 IEEE International Conference on Image Processing (ICIP)
- Status: Presented as poster
- Abstract:
- In this paper, we present a new passive millimeter-wave (PMMW) imaging system designed using compressive sensing principles. We employ randomly encoded masks at the focal plane of the PMMW imager to acquire incoherent measurements of the imaged scene. We develop a Bayesian reconstruction algorithm to estimate the original image from these measurements, where the sparsity inherent to typical PMMW images is efficiently exploited. Comparisons with other existing reconstruction methods show that the proposed reconstruction algorithm provides higher quality image estimates. Finally, we demonstrate with simulations using real PMMW images that the imaging duration can be dramatically reduced by acquiring only a few measurements compared to the size of the image.
Standoff Through-the-Wall Sensing at Ka Band
- Type: Full Length Journal Article
- Authors: S. Liao*, T. Elmer, S. Bakhtiari, N. Gopalsami, N. Cox, J. Wiencek, and A. C. Raptis
- Submitted To: Journal of Materials Evaluation
- Status: submitted
- Abstract
- Conventional microwave remote sensing/imaging of through-the-wall objects made of different materials is usually performed at frequencies below 3 GHz that provide relatively low spatial resolution. In this paper, we evaluate the ability and sensitivity of high-frequency microwave or millimeter wave standoff sensing of through-the-wall objects to achieve high spatial resolution. The target under study is a sandwich structure consisting of different object materials placed between two wall blocks. An Agilent® PNA-X series (model N5245A) vector network analyzer is used to sweep over the entire Ka-band (26.5 GHz to 40 GHz). The beam is then directed to a standard rectangular horn antenna and collimated by a 6-inch-diameter Gaussian lens towards the sandwich structure (wall block/object/wall block). The reflected electromagnetic wave is picked up by the same system as the complex S-parameter S11. Both amplitude and phase of the reflected signal are used to recognize different materials sandwiched between the cement blocks. The experimental results are compared with the theoretical calculations, which show satisfactory agreement for the cases evaluated in this work.
Compressive sampling in active and passive millimeter-wave imaging
- Type: Full Length Conference Paper
- Authors: S. Liao, T. Elmer, N. Gopalsami, A. Heifetz, and A. C. Raptis
- Submitted To: International Conference on Infrared, Millimeter, and THz waves, IRMMW-THz 2011, Houston, TX, October 2-7, 2011.
- Status: presented
- Abstract
- We have developed an efficient compressive sampling (CS) scheme for fast, high-fidelity millimeter wave (MMW) imaging. It is based on the use of Hadamard transform masks coupled to a single-pixel MMW imager. We have implemented it in both active and passive imaging modes. The active MMW imager works at 94 GHz and the passive mmW system is a Dicke-switched 16-channel radiometer from 146 GHz to 154 GHz with 500 MHz bandwidth per channel. In our CS implementation, we used an extended, twin-prime based, cyclic Hadamard mask made of chrome coating on a quartz plate. Hadamard data may be acquired by scanning with a 2-axis translation stage by two ways: progressive scanning or random scanning. Image reconstruction from a full set of Hadamard samples is a straightforward S matrix operation. To reconstruct from a subset of Hadamard acquisitions, we have devised a relaxation method that iteratively fills up the Hadamard space and then uses the regular S matrix operation for image reconstruction. We have reconstructed high fidelity images with only 1/9 of the full set of Hadamard acquisitions in both active and passive modes. The efficacy of compressive sampling is evaluated and compared for the active and passive cases from the standpoint of signal to noise ratio, normalized mean squared error, and percent of full samples.
Remote Sensing of Patterns of Cardiac Activity Using Statistical Methods and Non-Linear Optimization
- Type: Full Length Journal Article
- Authors: Mikhelson, I. V.;Bakhtiari, S.;Elmer, II, T. W.;Sahakian, A. V.
- Submitted To: IEEE Trans. on Biomedical Engineering
- Status: Submitted 2011.12.10
- Abstract
- Using a 94 GHz millimeter-wave interferometer, we are able to calculate the relative displacement of an object. When aimed at the chest of a human subject, we measure the minute motions of the chest due to cardiac activity. After processing the data using a wavelet multiresolution decomposition, we are able to obtain a signal with peaks at heartbeat locations. In order for these heartbeat locations to be accurate, the reflected signal must not be very noisy. Since there is noise in all but the most ideal conditions, we created a statistical algorithm in order to compensate for unconfident locations as computed by the wavelet transform. By analyzing the statistics of the peak locations, we fill in missing heartbeat locations and eliminate unnecessary ones. Along with this, we adapt the processing procedure to the current signal as opposed to using the same methods for all signals.
Passive millimeter wave imaging with compressive sensing
- Type: Full Length Journal Article (Special Issue on Millimeter Waves and Terahertz Imaging)
- Authors: N. Gopalsami, S. Liao, T. W. Elmer, E. R. Koehl, A. Heifetz, A. C. Raptis, L. Spinoulas, and A. K. Katsaggelos
- Prepared for: Optical Engineering
- Status: Being Prepared
- Abstract
- We have built a single-pixel, passive millimeter wave (PMMW) imaging and spectroscopy system with a 16-channel filter bank in the 146-154 GHz band for remote sensing of terrestrial targets. A 15-cm-diameter imaging lens is used to focus the radiation originating from a scene of interest into a corrugated scalar horn of the multispectral radiometer. Image acquisition is carried out by raster scanning the lens with a 2-axis translation stage. The integrated imaging and spectroscopy system provides 2D image of a scene as well as the spectral information corresponding to each pixel in the scene. Aided by sky reflected radiation, the imager produces high quality images in outdoor conditions.
Other Media
- PMMWS media page
- Contains other media, such as our CNN and radio interviews, Newspaper article, etc.
Rejected
Non-Contact Millimeter-Wave Real-Time Detection and Tracking of Heart Rate with a Non-Stationary Subject
- Type: Full Length Journal Article
- Authors: Ilya V. Mikhelson, Philip Lee, Sasan Bakhtiari, Thomas W. Elmer II, Aggelos K. Katsaggelos, and Alan V. Sahakian*
- Submitted To: IEEE Transactions on Information Technology in Biomedicine
- Reason for rejection: One-revision-only policy, paper needed further editing.
- Status: New data collected and paper revised for re-submission. New title: "Non-Contact Millimeter-Wave Real-Time Detection and Tracking of Heart Rate on an Ambulatory Subject"
Millimeter-wave I-Q sensor for biometrics applications
- Type: Full Length Conference Paper
- Authors: S. Liao*, S. Bakhtiari, T. Elmer, and A. C. Raptis
- Submitted To: Biometric Technology for Human Identification IX conference
- Reason for rejection: Confusion over deadline dates between a specific section and the entire conference led to only an abstract being submitted when the section required a full paper by a certain deadline as well.
To Do
- Need to add:
- Add the Pipeline Gas Leak presentation / citations
- ASNT Conference
- Ilya's TITB paper