1
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Das PS, Gagnon-Turcotte G, Mascret Q, Bou Assi E, Toffa DH, Sawan M, Nguyen DK, Gosselin B. A versatile wearable sEMG recording system for long-term epileptic seizure monitoring. Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:7489-7492. [PMID: 34892825 DOI: 10.1109/embc46164.2021.9629509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surface electromyography (sEMG) can be used to detect motor epileptic seizures non-invasively. For clinical use, a compact-size, user-friendly, safe and accurate sEMG measurement system can be worn by epileptic patients to detect and characterize a seizure. Such devices must be small, wireless, power-efficient minimally invasive and robust to avoid movement artefacts, friction, and slipping of the electrode, which can compromise data integrity and/or generate false positives or false negatives. This paper presents a highly versatile device that can be worn in different locations on the body to capture sEMG signals in a freely moving user without movement artefact. The system can be safely worn on the body for several hours to capture sEMG from wet Ag/AgCl electrodes, while sEMG data is wirelessly transmitted to a host computer within a range of 20 m. We demonstrate the versatility of our sensor by recording sEMG from five different body locations in a freely moving volunteer. Then, simulated seizure data was captured while the device was placed on the extensor carpi ulnaris. We show that sEMG bursts were successfully recorded to characterize the seizure afterward. The presented sensor prototype is small (5 cm x 3.5 cm x 1 cm), lightweight (46 g), and has an autonomy of 12 hrs from a small 110-mAh battery.
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2
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Hammoud A, Chhin D, Nguyen DK, Sawan M. A new molecular imprinted PEDOT glassy carbon electrode for carbamazepine detection. Biosens Bioelectron 2021; 180:113089. [PMID: 33662846 DOI: 10.1016/j.bios.2021.113089] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 11/17/2022]
Abstract
An electrochemical sensor for the detection of carbamazepine was fabricated by the electropolymerization of PEDOT on glassy carbon electrodes. Molecular imprinted polymer sites were synthesized by cyclic voltammetry on the electrodes' surfaces providing high selectivity and sensitivity towards carbamazepine molecules. Scanning electron microscopy validated the formation of the polymer. Extraction of carbamazepine from the polymer was performed by immersion in acetonitrile and validated by ultraviolet-visible spectroscopy along with cyclic voltammetry experiments comparing pre- and post-template extraction data. Further cyclic voltammetry and square-wave voltammetry tests aided in characterizing the electrodes' response to carbamazepine concentration in PBS solution with [Fe(CN)6]3-/4- as a redox pair/mediator. The limits of detection and quantification were found to be 0.98 x 10-3 M and 2.97 x 10-3 M respectively. The biosensor was highly sensitive to carbamazepine molecules in comparison to non-imprinted electrodes, simple to construct and easy to operate.
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Affiliation(s)
- A Hammoud
- Department of Electrical Engineering, Polytechnique Montréal, Montréal, QC, Canada.
| | - D Chhin
- Département de Chimie, UQAM, Montréal, QC, Canada
| | - D K Nguyen
- Centre Hospitalier de L'Université de Montréal, Université de Montréal, Montréal, QC, Canada
| | - M Sawan
- Department of Electrical Engineering, Polytechnique Montréal, Montréal, QC, Canada; School of Engineering, Westlake University, And Westlake Institute for Advanced Study, Zhejiang, China
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3
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Gagliano L, Assi EB, Toffa DH, Nguyen DK, Sawan M. Unsupervised Clustering of HRV Features Reveals Preictal Changes in Human Epilepsy. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2020:698-701. [PMID: 33018083 DOI: 10.1109/embc44109.2020.9175739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Over a third of patients suffering from epilepsy continue to live with recurrent disabling seizures and would greatly benefit from personalized seizure forecasting. While electroencephalography (EEG) remains most popular for studying subject-specific epileptic precursors, dysfunctions of the autonomous nervous system, notably cardiac activity measured in heart rate variability (HRV), have also been associated with epileptic seizures. This work proposes an unsupervised clustering technique which aims to automatically identify preictal HRV changes in 9 patients who underwent simultaneous electrocardiography (ECG) and intracranial EEG presurgical monitoring at the University of Montreal Hospital Center. A 2-class k-means clustering combined with a quantitative preictal HRV change detection technique were adopted in a subject- and seizure-specific manner. Results indicate inter and intra-patient variability in preictal HRV changes (between 3.5 and 6.5 min before seizure onset) and a statistically significant negative correlation between the time of change in HRV state and the duration of seizures (p<0.05). The presented findings show promise for new avenues of research regarding multimodal seizure prediction and unsupervised preictal time assessment.Clinical Relevance- This study proposed an unsupervised technique for quantitatively identifying preictal HRV changes which can be eventually used to implement an ECG-based seizure forecasting algorithm.
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Tantin A, Bou Assi E, van Asselt E, Hached S, Sawan M. Predicting urinary bladder voiding by means of a linear discriminant analysis: Validation in rats. Biomed Signal Process Control 2020. [DOI: 10.1016/j.bspc.2019.101667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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5
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Sawan M, Jeon YH, Chen TF. 84PSYCHOTROPIC MEDICINES USE IN RESIDENTS AND CULTURE: INFLUENCING CLINICAL EXCELLENCE (PRACTICE) TOOL: A DEVELOPMENT AND CONTENT VALIDATION STUDY. Age Ageing 2019. [DOI: 10.1093/ageing/afz061.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Sawan
- Faculty of Pharmacy, University of Sydney, Camperdown, NSW, Australia
| | - Y -H Jeon
- Faculty of Nursing, University of Sydney
| | - T F Chen
- Faculty of Pharmacy, University of Sydney, Camperdown, NSW, Australia
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Wong C, Barlcon L, Corradini M, Fogarty P, Ghoniem N, Majumdar S, Malang S, Mattas R, McCarthy K, Merrill B, Murphy J, Nelson B, Nygren R, Sawan M, Sharafat S, Sviatoslavsky I, Zinkle S. Evaluation of the Tungsten Alloy Vaporizing Lithium First Wall and Blanket Concept. ACTA ACUST UNITED AC 2018. [DOI: 10.13182/fst01-a11963340] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C.P.C. Wong
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - L. Barlcon
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | | | - P. Fogarty
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | | - S. Majumdar
- Argonne National Laboratory, Argonne, Illinois
| | - S. Malang
- Forschungszentrum Karlsruhe GmbH (FZK), Germany
| | - R. Mattas
- University of California, Los Angeles
| | - K. McCarthy
- Idaho National Engineering Environmental Laboratory (INEEL), Idaho
| | - B. Merrill
- Idaho National Engineering Environmental Laboratory (INEEL), Idaho
| | - J. Murphy
- University of Wisconsin, Madison, Wisconsin
| | - B. Nelson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - R. Nygren
- Sandia National Laboratories, Albuquerque, New Mexico
| | - M. Sawan
- University of Wisconsin, Madison, Wisconsin
| | | | | | - S. Zinkle
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
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7
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Najmabadi F, Conn RW, Bathke CG, Baxi CB, Bromberg L, Brooks J, Cheng ET, Davis F, Ehst DA, El-Guebaly LA, Emmert GA, Dolan TJ, Hasan MZ, Hassanein A, Herring JS, Holmes JA, Hua T, Hull A, Jardin SC, Kessel C, Khater HY, Krakowski RA, Leuer JA, Lousteau DC, Mattis R, Mau TK, McQuillan BW, Picologlou B, Puhn FA, Santarius JF, Sawan M, Schultz J, Schultz KR, Sharafat S, Snead L, Steiner D, Strickler DJ, Sviatoslavsky IN, Sze DK, Valenti M, Werley KA, Wong CPC. The ARIES-II and ARIES-IV Second-Stability Tokamak Reactors. ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst92-a29970] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - R. W. Conn
- University of California, Los Angeles, CA
| | | | | | - L. Bromberg
- Massachusetts Institute of Technology, Cambridge, MA
| | - J. Brooks
- Argonne National Laboratory, Argonne, IL
| | | | - F. Davis
- Oak Ridge National Laboratory, Oak Ridge, TN
| | - D. A. Ehst
- Argonne National Laboratory, Argonne, IL
| | | | | | - T. J. Dolan
- Idaho National Engineering Laboratory, Idaho Falls, I
| | | | | | - J. S. Herring
- Idaho National Engineering Laboratory, Idaho Falls, I
| | | | - T. Hua
- Argonne National Laboratory, Argonne, IL
| | - A. Hull
- Argonne National Laboratory, Argonne, IL
| | - S. C. Jardin
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | - C. Kessel
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | | | | | | | | | - R. Mattis
- Argonne National Laboratory, Argonne, IL
| | - T-K. Mau
- University of California, Los Angeles, CA
| | | | | | | | | | - M. Sawan
- University of Wisconsin, Madison, WI
| | - J. Schultz
- Massachusetts Institute of Technology, Cambridge, MA
| | | | | | - L. Snead
- Rensselaer Polytechnic Institute, Troy, NY
| | - D. Steiner
- Rensselaer Polytechnic Institute, Troy, NY
| | | | | | - D-K. Sze
- Argonne National Laboratory, Argonne, IL
| | - M. Valenti
- Rensselaer Polytechnic Institute, Troy, NY
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8
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El-Guebaly L, Wilson P, Henderson D, Sawan M, Sviatoslavsky G, Tautges T, Slaybaugh R, Kiedrowski B, Ibrahim A, Martin C, Raffray R, Malang S, Lyon J, Ku LP, Wang X, Bromberg L, Merrill B, Waganer L, Najmabadi F. Designing ARIES-CS Compact Radial Build and Nuclear System: Neutronics, Shielding, and Activation. Fusion Science and Technology 2017. [DOI: 10.13182/fst54-747] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- L. El-Guebaly
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - P. Wilson
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - D. Henderson
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - M. Sawan
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - G. Sviatoslavsky
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - T. Tautges
- Argonne National Laboratory, 9700 S. Cass Ave, Argonne, Illinois 60439
| | - R. Slaybaugh
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - B. Kiedrowski
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - A. Ibrahim
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - C. Martin
- University of Wisconsin-Madison, Fusion Technology Institute, 1500 Engineering Drive Madison, Wisconsin 53706
| | - R. Raffray
- University of California, San Diego, 9500 Gilman Drive, La Jolla, California 90093
| | - S. Malang
- Consultant, Fliederweg 3, D 76351 Linkenheim-Hochstetten, Germany
| | - J. Lyon
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - L. P. Ku
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - X. Wang
- University of California, San Diego, 9500 Gilman Drive, La Jolla, California 90093
| | - L. Bromberg
- Massachusetts Institute of Technology Plasma Science and Fusion Center Cambridge, Massachusetts 02139
| | - B. Merrill
- Idaho National Laboratory, Idaho Falls, Idaho
| | - L. Waganer
- The Boeing Company, St. Louis, Missouri 63166
| | - F. Najmabadi
- University of California, San Diego, 9500 Gilman Drive, La Jolla, California 90093
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9
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Stambaugh RD, Chan VS, Garofalo AM, Sawan M, Humphreys DA, Lao LL, Leuer JA, Petrie TW, Prater R, Snyder PB, Smith JP, Wong CPC. Fusion Nuclear Science Facility Candidates. Fusion Science and Technology 2017. [DOI: 10.13182/fst59-279] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. D. Stambaugh
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - V. S. Chan
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - A. M. Garofalo
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - M. Sawan
- University of Wisconsin, Madison, Wisconsin
| | - D. A. Humphreys
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - L. L. Lao
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - J. A. Leuer
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - T. W. Petrie
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - R. Prater
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - P. B. Snyder
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - J. P. Smith
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - C. P. C. Wong
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
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10
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Affiliation(s)
- B. Smith
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI
| | - P. Wilson
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI
| | - T. Bohm
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI
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11
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Loughlin MJ, Batistoni P, Konno C, Fischer U, Iida H, Petrizzi L, Polunovskiy E, Sawan M, Wilson P, Wu Y. ITER Nuclear Analysis Strategy and Requirements. Fusion Science and Technology 2017. [DOI: 10.13182/fst56-566] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M J Loughlin
- ITER Organization, Cadarache, 13108 St Paul-lez-Durance, France
| | - P. Batistoni
- Associazione EURATOM-ENEA sulla Fusione, Frascati (Roma), Italy
| | - C. Konno
- Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - U. Fischer
- Association FZK-Euratom, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
| | - H. Iida
- Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - L. Petrizzi
- Associazione EURATOM-ENEA sulla Fusione, Frascati (Roma), Italy
| | - E. Polunovskiy
- ITER Organization, Cadarache, 13108 St Paul-lez-Durance, France
| | - M. Sawan
- University of Wisconsin, Madison, WI USA
| | - P. Wilson
- University of Wisconsin, Madison, WI USA
| | - Y. Wu
- Academy of Sciences Institute of Plasma Physics, China
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12
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Najmabadi F, Raffray AR, Abdel-Khalik SI, Bromberg L, Crosatti L, El-Guebaly L, Garabedian PR, Grossman AA, Henderson D, Ibrahim A, Ihli T, Kaiser TB, Kiedrowski B, Ku LP, Lyon JF, Maingi R, Malang S, Martin C, Mau TK, Merrill B, Moore RL, Peipert RJ, Petti DA, Sadowski DL, Sawan M, Schultz JH, Slaybaugh R, Slattery KT, Sviatoslavsky G, Turnbull A, Waganer LM, Wang XR, Weathers JB, Wilson P, Waldrop JC, Yoda M, Zarnstorffh M. The ARIES-CS Compact Stellarator Fusion Power Plant. Fusion Science and Technology 2017. [DOI: 10.13182/fst54-655] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- F. Najmabadi
- Center for Energy Research University of California, San Diego, MC 0417, La Jolla, California 92093-0417
| | - A. R. Raffray
- Center for Energy Research University of California, San Diego, MC 0417, La Jolla, California 92093-0417
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13
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Abdou M, Sze D, Wong C, Sawan M, Ying A, Morley NB, Malang S. U.S. Plans and Strategy for ITER Blanket Testing. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a732] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Abdou
- UCLA Fusion Engineering Sciences, Los Angeles, CA
| | - D. Sze
- UCSD Advanced Energy Technology Group, San Diego, CA
| | - C. Wong
- General Atomics, San Diego, CA
| | - M. Sawan
- University of Wisconsin Fusion Technology Institute, Madison, WI
| | - A. Ying
- UCLA Fusion Engineering Sciences, Los Angeles, CA
| | - N. B. Morley
- UCLA Fusion Engineering Sciences, Los Angeles, CA
| | - S. Malang
- Consultant, Fliederweg 3, D 76351 Linkenheim-Hochstetten, Germany
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14
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Loughlin MJ, Polunovskiy E, Ioki K, Merola M, Sannazzaro G, Sawan M. Nuclear Shielding for the Toroidal Field Coils of ITER. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. J. Loughlin
- ITER Organization Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France
| | - E. Polunovskiy
- ITER Organization Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France
| | - K. Ioki
- ITER Organization Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France
| | - M. Merola
- ITER Organization Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France
| | - G. Sannazzaro
- ITER Organization Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin-Madison
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15
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Raffray AR, Robson AE, Sethian J, Gentile C, Marriott E, Rose D, Sawan M. Laser IFE Direct Drive Chamber Concepts with Magnetic Intervention. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-a8924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. R. Raffray
- University of California-San Diego, La Jolla, CA 92093-0417,
| | - A. E. Robson
- Consultant, Naval Research Laboratory, Washington, DC 20375,
| | - J. Sethian
- Naval Research Laboratory, Washington, DC 20375,
| | - C. Gentile
- Princeton Plasma Physics Laboratory, Princeton, NJ 08543-0451,
| | - E. Marriott
- University of Wisconsin-Madison, Madison, WI 53706,
| | - D. Rose
- Voss Scientific LLC, Albuquerque, NM 87108,
| | - M. Sawan
- University of Wisconsin-Madison, Madison, WI 53706,
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16
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Neumeyer C, Brooks A, Bryant L, Chrzanowski J, Feder R, Gomez M, Heitzenroeder P, Kalish M, Lipski A, Mardenfeld M, Simmons R, Titus P, Zatz I, Daly E, Martin A, Nakahira M, Pillsbury R, Feng J, Bohm T, Sawan M, Griffiths I, Schaffer M. Design of the ITER In-Vessel Coils. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12333] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C. Neumeyer
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - A. Brooks
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - L. Bryant
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - J. Chrzanowski
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - R. Feder
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - M. Gomez
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | | | - M. Kalish
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - A. Lipski
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - M. Mardenfeld
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - R. Simmons
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - P. Titus
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - I. Zatz
- Princeton University, Plasma Physics Lab, Princeton, NJ, USA
| | - E. Daly
- ITER Organization, St. Paul-lez-Durance, France
| | - A. Martin
- ITER Organization, St. Paul-lez-Durance, France
| | - M. Nakahira
- ITER Organization, St. Paul-lez-Durance, France
| | | | - J. Feng
- MIT Plasma Science and Fusion Center, Cambridge, MA, USA
| | - T. Bohm
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI, USA
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17
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Peng Y, Canik J, Diem S, Milora S, Park J, Sontag A, Fogarty P, Lumsdaine A, Murakami M, Burgess T, Cole M, Katoh Y, Korsah K, Patton B, Wagner J, Yoder G, Stambaugh R, Staebler G, Kotschenreuther M, Valanju P, Mahajan S, Sawan M. Fusion Nuclear Science Facility (FNSF) before Upgrade to Component Test Facility (CTF). Fusion Science and Technology 2017. [DOI: 10.13182/fst60-441] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y.K.M. Peng
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.M. Canik
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - S.J. Diem
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - S.L. Milora
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.M. Park
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - A.C. Sontag
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | - A. Lumsdaine
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - M. Murakami
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - T.W. Burgess
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - M.J. Cole
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - K. Korsah
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - B.D. Patton
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.C. Wagner
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - G.L. Yoder
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | | | | | | | | | - M. Sawan
- University of Wisconsin, Madison, WI, USA
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18
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Olson C, Rochau G, Slutz S, Morrow C, Olson R, Cuneo M, Hanson D, Bennett G, Sanford T, Bailey J, Stygar W, Vesey R, Mehlhorn T, Struve K, Mazarakis M, Savage M, Pointon T, Kiefer M, Rosenthal S, Cochrane K, Schneider L, Glover S, Reed K, Schroen D, Farnum C, Modesto M, Oscar D, Chhabildas L, Boyes J, Vigil V, Keith R, Turgeon M, Cipiti M, Lindgren E, Dandini V, Tran H, Smith D, McDaniel D, Quintenz J, Matzen MK, VanDevender JP, Gauster W, Shephard L, Walck M, Renk T, Tanaka T, Ulrickson M, Meier W, Latkowski J, Moir R, Schmitt R, Reyes S, Abbott R, Peterson R, Pollock G, Ottinger P, Schumer J, Peterson P, Kammer D, Kulcinski G, El-Guebaly L, Moses G, Sviatoslavsky I, Sawan M, Anderson M, Bonazza R, Oakley J, Meekunasombat P, De Groot J, Jensen N, Abdou M, Ying A, Calderoni P, Morley N, Abdel-Khalik S, Dillon C, Lascar C, Sadowski D, Curry R, McDonald K, Barkey M, Szaroletta W, Gallix R, Alexander N, Rickman W, Charman C, Shatoff H, Welch D, Rose D, Panchuk P, Louie D, Dean S, Kim A, Nedoseev S, Grabovsky E, Kingsep A, Smirnov V. Development Path for Z-Pinch IFE. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a757] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C. Olson
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - G. Rochau
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - S. Slutz
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - C. Morrow
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - R. Olson
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Cuneo
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - D. Hanson
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - G. Bennett
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - T. Sanford
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - J. Bailey
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - W. Stygar
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - R. Vesey
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - T. Mehlhorn
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - K. Struve
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Mazarakis
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Savage
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - T. Pointon
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Kiefer
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - S. Rosenthal
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - K. Cochrane
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - L. Schneider
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - S. Glover
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - K. Reed
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - D. Schroen
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - C. Farnum
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Modesto
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - D. Oscar
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - L. Chhabildas
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - J. Boyes
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - V. Vigil
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - R. Keith
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Turgeon
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Cipiti
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - E. Lindgren
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - V. Dandini
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - H. Tran
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - D. Smith
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - D. McDaniel
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - J. Quintenz
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. K. Matzen
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | | | - W. Gauster
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - L. Shephard
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Walck
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - T. Renk
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - T. Tanaka
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - M. Ulrickson
- Sandia National Laboratories, Albuquerque, NM 87107 USA
| | - W. Meier
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - J. Latkowski
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - R. Moir
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - R. Schmitt
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - S. Reyes
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - R. Abbott
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
| | - R. Peterson
- Los Alamos National Laboratories, Los Alamos, NM 87545, USA
| | - G. Pollock
- Los Alamos National Laboratories, Los Alamos, NM 87545, USA
| | - P. Ottinger
- Naval Research Laboratory, Washington, DC 20375, USA
| | - J. Schumer
- Naval Research Laboratory, Washington, DC 20375, USA
| | - P. Peterson
- University of California, Berkeley, CA 94720, USA
| | - D. Kammer
- University of Wisconsin, Madison, WI 53706, USA
| | | | | | - G. Moses
- University of Wisconsin, Madison, WI 53706, USA
| | | | - M. Sawan
- University of Wisconsin, Madison, WI 53706, USA
| | - M. Anderson
- University of Wisconsin, Madison, WI 53706, USA
| | - R. Bonazza
- University of Wisconsin, Madison, WI 53706, USA
| | - J. Oakley
- University of Wisconsin, Madison, WI 53706, USA
| | | | - J. De Groot
- University of California, Davis, Davis, CA 95616, USA
| | - N. Jensen
- University of California, Davis, Davis, CA 95616, USA
| | - M. Abdou
- University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - A. Ying
- University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - P. Calderoni
- University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - N. Morley
- University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - S. Abdel-Khalik
- Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - C. Dillon
- Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - C. Lascar
- Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - D. Sadowski
- Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - R. Curry
- University of Missouri-Columbia, Columbia, MO 65211, USA
| | - K. McDonald
- University of Missouri-Columbia, Columbia, MO 65211, USA
| | - M. Barkey
- University of Alabama, Tuscaloosa, AL 35487, USA
| | - W. Szaroletta
- University of New Mexico, Albuquerque, NM 87106, USA
| | - R. Gallix
- General Atomics, San Diego, CA 92121, USA
| | | | - W. Rickman
- General Atomics, San Diego, CA 92121, USA
| | - C. Charman
- General Atomics, San Diego, CA 92121, USA
| | - H. Shatoff
- General Atomics, San Diego, CA 92121, USA
| | - D. Welch
- ATK Mission Research, Albuquerque, NM 87110, USA
| | - D. Rose
- ATK Mission Research, Albuquerque, NM 87110, USA
| | | | - D. Louie
- Omicron, Albuquerque, NM 87110, USA
| | - S. Dean
- Fusion Power Associates, Gaithersburg, MD 20879, USA
| | - A. Kim
- Institute of High Current Electronics, Tomsk, Russia
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19
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Wong C, Malang S, Sawan M, Smolentsev S, Majumdar S, Merrill B, Sze DK, Morley N, Sharafat S, Dagher M, Peterson P, Zhao H, Zinkle SJ, Abdou M, Youssef M. Assessment of First Wall and Blanket Options with the Use of Liquid Breeder. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a734] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C.P.C. Wong
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - S. Malang
- Fusion Nuclear Technology Consulting, Linkenheim, Germany
| | - M Sawan
- University of Wisconsin, Madison, Wisconsin
| | | | - S. Majumdar
- Argonne National Laboratory, Argonne, Illinois
| | | | - D. K. Sze
- University of California, San Diego, California
| | - N. Morley
- University of California, Los Angeles, California
| | - S Sharafat
- University of California, Los Angeles, California
| | - M. Dagher
- University of California, Los Angeles, California
| | - P. Peterson
- University of California, Berkeley, California
| | - H Zhao
- University of California, Berkeley, California
| | - S. J. Zinkle
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - M. Abdou
- University of California, Los Angeles, California
| | - M Youssef
- University of California, Los Angeles, California
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20
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Daly EF, Ioki K, Loarte A, Martin A, Brooks A, Heitzenroeder P, Kalish M, Neumeyer C, Titus P, Zhai Y, Wu Y, Jin H, Long F, Song Y, Wang Z, Pillsbury R, Feng J, Bohm T, Sawan M, Preble J. Update on Design of the ITER In-Vessel Coils. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a18073] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- E. F. Daly
- ITER Organization, Route de Vinon, 13115 St Paul-lez-Durance, France
| | - K. Ioki
- ITER Organization, Route de Vinon, 13115 St Paul-lez-Durance, France
| | - A. Loarte
- ITER Organization, Route de Vinon, 13115 St Paul-lez-Durance, France
| | - A. Martin
- ITER Organization, Route de Vinon, 13115 St Paul-lez-Durance, France
| | - A. Brooks
- Princeton Plasma Physics Lab, Princeton, NJ, USA
| | | | - M. Kalish
- Princeton Plasma Physics Lab, Princeton, NJ, USA
| | - C. Neumeyer
- Princeton Plasma Physics Lab, Princeton, NJ, USA
| | - P. Titus
- Princeton Plasma Physics Lab, Princeton, NJ, USA
| | - Y. Zhai
- Princeton Plasma Physics Lab, Princeton, NJ, USA
| | - Y. Wu
- Chinese Academy of Sciences - Institute of Plasma Physics, Anhui, China
| | - H. Jin
- Chinese Academy of Sciences - Institute of Plasma Physics, Anhui, China
| | - F. Long
- Chinese Academy of Sciences - Institute of Plasma Physics, Anhui, China
| | - Y. Song
- Chinese Academy of Sciences - Institute of Plasma Physics, Anhui, China
| | - Z. Wang
- Chinese Academy of Sciences - Institute of Plasma Physics, Anhui, China
| | | | - J. Feng
- MIT Plasma Science and Fusion Center, Cambridge, MA, USA,
| | - T. Bohm
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - J. Preble
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
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21
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Rezaei M, Maghsoudloo E, Sawan M, Gosselin B. A 110-nW in-channel sigma-delta converter for large-scale neural recording implants. Annu Int Conf IEEE Eng Med Biol Soc 2017; 2016:5741-5744. [PMID: 28269558 DOI: 10.1109/embc.2016.7592031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Advancement in wireless and microsystems technology have ushered in new devices that can directly interface with the central nervous system for stimulating and/or monitoring neural circuitry. In this paper, we present an ultra low-power sigma-delta analog-to-digital converter (ADC) intended for utilization into large-scale multi-channel neural recording implants. This proposed design, which provides a resolution of 9 bits using a one-bit oversampled ADC, presents several desirable features that allow for an in-channel ADC scheme, where one sigma-delta converter is provided for each channel, enabling development of scalable systems that can interface with different types of high-density neural microprobes. The proposed circuit, which have been fabricated in a TSMC 180-nm CMOS process, employs a first order noise shaping topology with a passive integrator and a low-supply voltage of 0.6 V to achieve ultra low-power consumption and small size. The proposed ADC clearly outperforms other designs with a power consumption as low as 110 nW for a precision of 9 bits (11-fJ per conversion), a silicon area of only 82 μm × 84 μm and one of the best reported figure of merit among recently published data converters utilized in similar applications.
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22
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Gagnon-Turcotte G, Sawan M, Gosselin B. Low-power adaptive spike detector based on a sigma-delta control loop. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:2167-70. [PMID: 26736719 DOI: 10.1109/embc.2015.7318819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper presents a resources-optimized digital action potential (AP) detector featuring an adaptive threshold based on a new Sigma-delta control loop. The proposed AP detector is optimized for utilizing low hardware resources, which makes it suitable for implementation on most popular low-power microcontrollers units (MCU). The adaptive threshold is calculated using a digital control loop based on a Sigma-delta modulator that precisely estimates the standard deviation of the amplitude of the neuronal signal. The detector was implemented on a popular low-power MCU and fully characterized experimentally using previously recorded neural signals with different signal-to-noise ratios. A comparison of the obtained results with other thresholding approaches shows that the proposed method can compete with high performance and highly resources demanding spike detection approaches while achieving up to 100% of true positive detection rate at high SNR, and up to 63% for an SNR as low as 0 dB, while necessitating an execution time as low as 11 μs with the MCU operating at 8 MHz.
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23
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Biardeau X, Biardeau X, Hached S, Lotouchin O, Campeau L, Sawan M, Corcos J. Sphincter urinaire artificiel électromécanique : résultats in vitro. Prog Urol 2015; 25:842. [DOI: 10.1016/j.purol.2015.08.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Secaf A, Martins J, Sawan M, Godoy A. Interaction between brain neuronal circuits of the face recognition memory area and the auditory memory area in Duchenne muscular dystrophy patients. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Mirbozorgi SA, Ameli R, Sawan M, Gosselin B. Towards a wireless optical stimulation system for long term in-vivo experiments. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:2024-7. [PMID: 25570381 DOI: 10.1109/embc.2014.6944013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This paper presents our recent progresses towards the development of a wirelessly powered head mountable optical stimulator for enabling long-term optogenetic experiments with small freely moving transgenic models. The proposed system includes a wireless power transmission chamber with uniform power distribution in 3D and a wireless head mountable optical stimulator prototype with power recovery. The wireless power link, which includes the inductive chamber and power recovery circuits, is robust against subject movements in all directions, and against angular misalignment. Such link provides uniform power distribution without the need for a closed-loop control system, and can localize the transmitted power towards the receiver, without using additional detection and control circuitry compared to other systems. Additionally, the chamber is equipped with a camera for capturing the animal motion and behavior after applying optical stimulation patterns. A low-power microcontroller unit is embedded with the stimulator prototype to generate arbitrary light stimulation patterns. Measurement results show that the inductive chamber can continuously deliver 70 mW to the stimulator prototype with a power efficiency of 59%.
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26
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Sawan M, Fois R, Chen T. Organisational culture and psychotropic medicine use in Residential Aged Care Facilities (RACFs). Res Social Adm Pharm 2014. [DOI: 10.1016/j.sapharm.2014.07.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Sawan M, Fois R, Chen T. Organisational climate and use of medicines: Patients’ perspective of Residential Aged Care Facilities (RACFs). Res Social Adm Pharm 2014. [DOI: 10.1016/j.sapharm.2014.07.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Caremel R, Corcos J, Hached S, Lotouchin O, Sawan M. Sphincter artificiel électronique télé-commandé et compatible avec le sphincter AMS 800. Prog Urol 2013. [DOI: 10.1016/j.purol.2013.08.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Mirbozorgi SA, Sawan M, Gosselin B. Multicoil resonance-based parallel array for smart wireless power delivery. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:751-4. [PMID: 24109796 DOI: 10.1109/embc.2013.6609609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This paper presents a novel resonance-based multicoil structure as a smart power surface to wirelessly power up apparatus like mobile, animal headstage, implanted devices, etc. The proposed powering system is based on a 4-coil resonance-based inductive link, the resonance coil of which is formed by an array of several paralleled coils as a smart power transmitter. The power transmitter employs simple circuit connections and includes only one power driver circuit per multicoil resonance-based array, which enables higher power transfer efficiency and power delivery to the load. The power transmitted by the driver circuit is proportional to the load seen by the individual coil in the array. Thus, the transmitted power scales with respect to the load of the electric/electronic system to power up, and does not divide equally over every parallel coils that form the array. Instead, only the loaded coils of the parallel array transmit significant part of total transmitted power to the receiver. Such adaptive behavior enables superior power, size and cost efficiency then other solutions since it does not need to use complex detection circuitry to find the location of the load. The performance of the proposed structure is verified by measurement results. Natural load detection and covering 4 times bigger area than conventional topologies with a power transfer efficiency of 55% are the novelties of presented paper.
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Semmaoui H, Drolet J, Lakhssassi A, Sawan M. Setting Adaptive Spike Detection Threshold for Smoothed TEO Based on Robust Statistics Theory. IEEE Trans Biomed Eng 2012; 59:474-82. [DOI: 10.1109/tbme.2011.2174992] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Safi-Harb M, Salam MT, Mirabbasi S, Nguyen DK, Sawan M. A low-power high-sensitivity CMOS mixed-signal seizure-onset detector. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:5847-50. [PMID: 22255669 DOI: 10.1109/iembs.2011.6091446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In this paper, we present a new seizure detection algorithm and the associated CMOS circuitry implementation. The proposed low-power seizure detector is a good candidate for an implantable epilepsy prosthesis. The device is designed for patient-specific seizure detection with a one variable parameter. The parameter value is extracted from a single seizure that is subsequently excluded from the validation phase. A two-path system is also proposed to minimize the detection delay. The algorithm is first validated using MATLAB® tools and then implemented and validated using circuits designed in a standard 0.18-μm CMOS process with a total power dissipation of 7.08 μW. A total of 13 seizures from two drug-resistant epileptic patients are assessed using the proposed algorithm and resulted in 100% sensitivity and a mean detection delay of 9.7 s after electrical onset.
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Affiliation(s)
- M Safi-Harb
- Polystim Neurotechnologies Laboratory, École Polytechnique de Montréal, Montréal, Canada
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32
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Mirbozorgi SA, Gosselin B, Sawan M. A transcutaneous power transfer interface based on a multicoil inductive link. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2012:1659-1662. [PMID: 23366226 DOI: 10.1109/embc.2012.6346265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper presents a transcutaneous power transfer link based on a multicoil structure. Multicoil inductive links using 4-coil or 3-coil topologies have shown significant improvement over conventional 2-coil structures for transferring power transcutaneously across larger distances and with higher efficiency. However, such performance comes at the cost of additional inductors and capacitor in the system, which is not convenient in implantable applications. This paper presents a transcutaneous power transfer interface that takes advantage on a 3-coils inductive topology to achieve wide separation distances and high power transfer efficiency without increasing the size of the implanted device compared to a conventional 2-coil structure. In the proposed link, a middle coil is placed outside the body to act as a repeater between an external transmitting coil and an implanted receiving coil. The proposed structure allows optimizing the link parameters after implantation by changing the characteristics of the repeater coil. Simulation with a multilayer model of the biological tissues and measured results are presented for the proposed link.
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Affiliation(s)
- S A Mirbozorgi
- Dept. of Electrical and Computer Eng., Université Laval, Quebec, QC G1V 0A6, Canada.
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Abstract
A novel implantable low-power integrated circuit is proposed for real-time epileptic seizure detection. The presented chip is part of an epilepsy prosthesis device that triggers focal treatment to disrupt seizure progression. The proposed chip integrates a front-end preamplifier, voltage-level detectors, digital demodulators, and a high-frequency detector. The preamplifier uses a new chopper stabilizer topology that reduces instrumentation low-frequency and ripple noises by modulating the signal in the analog domain and demodulating it in the digital domain. Moreover, each voltage-level detector consists of an ultra-low-power comparator with an adjustable threshold voltage. The digitally integrated high-frequency detector is tunable to recognize the high-frequency activities for the unique detection of seizure patterns specific to each patient. The digitally controlled circuits perform accurate seizure detection. A mathematical model of the proposed seizure detection algorithm was validated in Matlab and circuits were implemented in a 2 mm(2) chip using the CMOS 0.18- μm process. The proposed detector was tested by using intracerebral electroencephalography (icEEG) recordings from seven patients with drug-resistant epilepsy. The seizure signals were assessed by the proposed detector and the average seizure detection delay was 13.5 s, well before the onset of clinical manifestations. The measured total power consumption of the detector is 51 μW.
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Al-Terkawi Hasib O, Sawan M, Savaria Y. A Low-Power Asynchronous Step-Down DC-DC Converter for Implantable Devices. IEEE Trans Biomed Circuits Syst 2011; 5:292-301. [PMID: 23851480 DOI: 10.1109/tbcas.2010.2103073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we present a fully integrated asynchronous step-down switched capacitor dc-dc conversion structure suitable for supporting ultra-low-power circuits commonly found in biomedical implants. The proposed converter uses a fully digital asynchronous state machine as the heart of the control circuitry to generate the drive signals. To minimize the switching losses, the asynchronous controller scales the switching frequency of the drive signals according to the loading conditions. It also turns on additional parallel switches when needed and has a backup synchronous drive mode. This circuit regulates load voltages from 300 mV to 1.1 V derived from a 1.2-V input voltage. A total of 350 pF on-chip capacitance was implemented to support a maximum of 230-μ W load power, while providing efficiency up to 80%. The circuit validating the proposed concepts was fabricated in 0.13- μm complementary metal-oxide semiconductor technology. Experimental test results confirm the expected functionality and performance of the proposed circuit.
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Mounaim F, Sawan M. Integrated high-voltage inductive power and data-recovery front end dedicated to implantable devices. IEEE Trans Biomed Circuits Syst 2011; 5:283-291. [PMID: 23851479 DOI: 10.1109/tbcas.2010.2103558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In near-field electromagnetic links, the inductive voltage is usually much larger than the compliance of low-voltage integrated-circuit (IC) technologies used for the implementation of implantable devices. Thus most integrated power-recovery approaches limit the induced signal to low voltages with inefficient shunt regulation or voltage clipping. In this paper, we propose using high-voltage (HV) complementary metal-oxide semiconductor technology to fully integrate the inductive power and data-recovery front end while adopting a step-down approach where the inductive voltage is left free up to 20 or 50 V. The advantage is that excessive inductive power will translate to an additional charge that can be stored in a capacitor, instead of shunting to ground excessive current with voltage limiters. We report the design of two consecutive HV custom ICs-IC1 and IC2-fabricated in DALSA semiconductor C08G and C08E technologies, respectively, with a total silicon area (including pads) of 4 and 9 mm(2), respectively. Both ICs include HV rectification and regulation; however, IC2 includes two enhanced rectifier designs, a voltage-doubler, and a bridge rectifier, as well as data recovery. Postlayout simulations show that both IC2 rectifiers achieve more than 90% power efficiency at a 1-mA load and provide enough room for 12-V regulation at a 3-mA load and a maximum-available inductive power of 50 mW only. Successful measurement results show that HV regulators provide a stable 3.3- to 12-V supply from an unregulated input up to 50 or 20 V for IC1 and IC2, respectively, with performance that matches simulation results.
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Ethier S, Sawan M. Exponential current pulse generation for efficient very high-impedance multisite stimulation. IEEE Trans Biomed Circuits Syst 2011; 5:30-38. [PMID: 23850976 DOI: 10.1109/tbcas.2010.2073707] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We describe in this paper an intracortical current-pulse generator for high-impedance microstimulation. This dual-chip system features a stimuli generator and a high-voltage electrode driver. The stimuli generator produces flexible rising exponential pulses in addition to standard rectangular stimuli. This novel stimulation waveform is expected to provide superior energy efficiency for action potential triggering while releasing less toxic reduced ions in the cortical tissues. The proposed fully integrated electrode driver is used as the output stage where high-voltage supplies are generated on-chip to significantly increase the voltage compliance for stimulation through high-impedance electrode-tissue interfaces. The stimuli generator has been implemented in 0.18-μm CMOS technology while a 0.8-μm CMOS/DMOS process has been used to integrate the high-voltage output stage. Experimental results show that the rectangular pulses cover a range of 1.6 to 167.2 μA with a DNL and an INL of 0.098 and 0.163 least-significant bit, respectively. The maximal dynamic range of the generated exponential reaches 34.36 dB at full scale within an error of ± 0.5 dB while all of its parameters (amplitude, duration, and time constant) are independently programmable over wide ranges. This chip consumes a maximum of 88.3 μ W in the exponential mode. High-voltage supplies of 8.95 and -8.46 V are generated by the output stage, boosting the voltage swing up to 13.6 V for a load as high as 100 kΩ.
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Sawan M, Miled MA, Ghafar-Zadeh E. CMOS/microfluidic Lab-on-chip for cells-based diagnostic tools. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2010:5334-7. [PMID: 21096255 DOI: 10.1109/iembs.2010.5626464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We describe in this paper cells sensing and manipulation methods, as well as platforms based on Lab-on-chip devices. Among other contributions, new circuit and microfluidic techniques, and packaging methods are proposed for efficient cells manipulation and detection. The proposed devices include high-sensitivity sensing circuits (200 mV/fF), low-pressure liquid injection interfaces (< 0.65 psi), low-voltage manipulation signals, direct-write microfluidic fabrication technique on top of CMOS based capacitive sensors. In addition, several types of electrode arrays (square and L-shaped) are used for the manipulation of various types of cells and particles.
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Affiliation(s)
- M Sawan
- Polystim Neurotechnologies Laboratory, Dept. of Elec. Eng., Polytechnique Montréal, Canada
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Sawan M, Ibrahim A, Bohm T, Wilson P. Nuclear Assessment of Shielding Configuration Options for Final Optics of HAPL Laser Fusion Power Plant. Fusion Science and Technology 2009. [DOI: 10.13182/fst09-a9000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Sawan
- Fusion Technology Institute, University of Wisconsin-Madison, Madison. WI
| | - A. Ibrahim
- Fusion Technology Institute, University of Wisconsin-Madison, Madison. WI
| | - T. Bohm
- Fusion Technology Institute, University of Wisconsin-Madison, Madison. WI
| | - P. Wilson
- Fusion Technology Institute, University of Wisconsin-Madison, Madison. WI
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Ghafar-Zadeh E, Sawan M, Chodavarapu VP. Micro-Organism-on-Chip: Emerging Direct-Write CMOS-Based Platform for Biological Applications. IEEE Trans Biomed Circuits Syst 2009; 3:212-219. [PMID: 23853242 DOI: 10.1109/tbcas.2009.2023453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We describe the emerging applications of direct-write CMOS-based lab-on-chip which consists of capacitive sensors integrated with microfluidic structures. The microfluidic components are implemented through direct-write microfabrication process (DWFP) on a variety of substrates including integrated circuits. We put forward the recent advances of DWFP for different applications while our focus is placed on biological testing through a novel on-chip capacitive measurement method. We thereafter reveal the viability of this approach for biosensing purposes by demonstrating and discussing the experimental results on micro-organisms. These results are in full agreement with the bio-interface model and other features presented throughout the paper.
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Gosselin B, Ayoub AE, Roy JF, Sawan M, Lepore F, Chaudhuri A, Guitton D. A mixed-signal multichip neural recording interface with bandwidth reduction. IEEE Trans Biomed Circuits Syst 2009; 3:129-141. [PMID: 23853214 DOI: 10.1109/tbcas.2009.2013718] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a multichip structure assembled with a medical-grade stainless-steel microelectrode array intended for neural recordings from multiple channels. The design features a mixed-signal integrated circuit (IC) that handles conditioning, digitization, and time-division multiplexing of neural signals, and a digital IC that provides control, bandwidth reduction, and data communications for telemetry toward a remote host. Bandwidth reduction is achieved through action potential detection and complete capture of waveforms by means of onchip data buffering. The adopted architecture uses high parallelism and low-power building blocks for safety and long-term implantability. Both ICs are fabricated in a CMOS 0.18-mum process and are subsequently mounted on the base of the microelectrode array. The chips are stacked according to a vertical integration approach for better compactness. The presented device integrates 16 channels, and is scalable to hundreds of recording channels. Its performance was validated on a testbench with synthetic neural signals. The proposed interface presents a power consumption of 138 muW per channel, a size of 2.30 mm(2), and achieves a bandwidth reduction factor of up to 48 with typical recordings.
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Coulombe J, Sawan M, Gervais JF. A highly flexible system for microstimulation of the visual cortex: design and implementation. IEEE Trans Biomed Circuits Syst 2007; 1:258-269. [PMID: 23852007 DOI: 10.1109/tbcas.2007.916026] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This paper presents the design of a system intended to be used as a prosthesis allowing profoundly visually impaired patients to recover partial vision by means of microstimulation in the primary visual cortex area. The main component of the system is a bio-electronic device to be implanted inside the skull of the user, composed of a plurality of stimulation modules, whose actions are controlled via an interface module. Power and data are transmitted to the implant wirelessly through a bidirectional inductive link, allowing diagnosis of the stimulating device and its environment after implantation, as well as power delivery optimization. A high level of flexibility is supported in terms of stimulation parameters, but a configurable communication protocol allows the device to be used with maximum efficiency. The core of an external controller implemented in a system on a programmable chip is also presented, performing data conversion and timing management such that phosphene intensity can be modulated by any parameter defining stimulation, either at the pulse level or in the time domain. Measured performances achieved with a prototype using two types of custom ASICs implemented in a 0.18-mum CMOS process and commercial components fulfill the requirements for a complete visual prosthesis for humans. When on/off activation is used with predefined parameters, stimuli measured on an electronic test bench could attain a rate in excess of 500 k pulses/s.
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Ghafar-Zadeh E, Sawan M. A Hybrid Microfluidic/CMOS Capacitive Sensor Dedicated to Lab-on-Chip Applications. IEEE Trans Biomed Circuits Syst 2007; 1:270-277. [PMID: 23852008 DOI: 10.1109/tbcas.2008.915641] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A hybrid microfluidic/IC capacitive sensor is presented in this paper for highly integrated lab-on-chips (LoCs). We put forward the design and implementation of a charge based capacitive sensor array in 0.18-mum CMOS process. This sensor chip is incorporated with a microfluidic channel using direct-write microfluidic fabrication process (DWFP). The design, construction and experimental results as well are demonstrated using four different chemical solutions with known dielectric constants. The proposed highly sensitive CMOS capacitive sensor (ap530 mV/fF) along with low complexity DWFP emerges as clear favorite for LoC applications.
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El-Guebaly L, Wilson P, Sawan M. Activation and Waste Stream Analysis for RTL of Z-Pinch Power Plant. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- L. El-Guebaly
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - P. Wilson
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin, Madison, WI
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Sawan M, El-Guebaly L, Wilson P. Three-Dimensional Nuclear Assessment for the Chamber of Z-Pinch Power Plant. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1582] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Sawan
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - L. El-Guebaly
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - P. Wilson
- Fusion Technology Institute, University of Wisconsin, Madison, WI
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El-Guebaly L, Sawan M, Sviatoslavsky I, Wilson P, Sviatoslavsky G, Kulcinski G. Z-Pinch Chamber Assessment and Design. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- L. El-Guebaly
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - M. Sawan
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - I. Sviatoslavsky
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - P. Wilson
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - G. Sviatoslavsky
- Fusion Technology Institute, University of Wisconsin, Madison, WI
| | - G. Kulcinski
- Fusion Technology Institute, University of Wisconsin, Madison, WI
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Gosselin B, Sawan M, Chapman CA. A low-power integrated bioamplifier with active low-frequency suppression. IEEE Trans Biomed Circuits Syst 2007; 1:184-192. [PMID: 23852412 DOI: 10.1109/tbcas.2007.914490] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present in this paper a low-power bioamplifier suitable for massive integration in dense multichannel recording devices. This bioamplifier achieves reduced-size compared to previous designs by means of active low-frequency suppression. An active integrator located in the feedback path of a low-noise amplifier is employed for placing a highpass cutoff frequency within the transfer function. A very long integrating time constant is achieved using a small integrated capacitor and a MOS-bipolar equivalent resistor. This configuration rejects unwanted low-frequency contents without the need for input RC networks or large feedback capacitors. Therefore, the bioamplifier high-input impedance and small size are preserved. The bioamplifier, implemented in a 0.18-mum CMOS process, has been designed for neural recording of action potentials, and optimised through a transconductance-ef-ficiency design methodology for micropower operation. Measured performance and results obtained from in vivo recordings are presented. The integrated bioamplifier provides a midband gain of 50 dB, and achieves an input-referred noise of 5.6 muVrms. It occupies less than 0.050 mm(2) of chip area and dissipates 8.6 muW.
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Ghafar-Zadeh E, Sawan M, Hajj-Hassan M, Miled MA. A CMOS based microfluidic detector: Design, calibration and experimental results. ACTA ACUST UNITED AC 2007. [DOI: 10.1109/mwscas.2007.4488568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sawan M, Laaziri Y, Mounaim F, Elzayat E, Corcos J, Elhilali MM. Electrode–tissues interface: modeling and experimental validation. Biomed Mater 2007; 2:S7-S15. [DOI: 10.1088/1748-6041/2/1/s02] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wong C, Malang S, Sawan M, Dagher M, Smolentsev S, Merrill B, Youssef M, Reyes S, Sze D, Morley N, Sharafat S, Calderoni P, Sviatoslavsky G, Kurtz R, Fogarty P, Zinkle S, Abdou M. An overview of dual coolant Pb–17Li breeder first wall and blanket concept development for the US ITER-TBM design. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2005.05.012] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Morley N, Abdou M, Anderson M, Calderoni P, Kurtz R, Nygren R, Raffray R, Sawan M, Sharpe P, Smolentsev S, Willms S, Ying A. Overview of fusion nuclear technology in the US. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2005.06.359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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