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401 results on '"Kaufmann, Paul"'

1. Mid-IR spectroscopy with NIR grating spectrometers

Author

Kaufmann, Paul, Chrzanowski, Helen M., Vanselow, Aron, and Ramelow, Sven

Subjects
Physics - Optics, Quantum Physics
Abstract

Mid-infrared (mid-IR) spectroscopy is a crucial workhorse for a plethora of analytical applications and is suitable for diverse materials, including gases, polymers or biological tissue. However, this technologically significant wavelength regime between 2.5-10$\mu$m suffers from technical limitations primarily related to the large noise in mid-IR detectors and the complexity and cost of bright, broadband mid-IR light sources. Here, using highly non-degenerate, broadband photon pairs from bright spontaneous parametric down-conversion (SPDC) in a nonlinear interferometer, we circumvent these limitations and realise spectroscopy in the mid-IR using only a visible (VIS) solid-state laser and an off-the-shelf, commercial near-infrared (NIR) grating spectrometer. With this proof-of-concept implementation, covering a broad range from 3.2$\mu$m to 4.4$\mu$m, we access short integration times down to 1s and signal-to-noise ratios above 200 at a spectral resolution from 12cm$^{-1}$ down to 1.5cm$^{-1}$ for longer integration times. Through the analysis of polymer samples and the ambient CO$_2$ in our laboratory, we highlight the potential of this measurement technique for real-world applications., Comment: 12 pages, 4 figures, submitted to Optics Express

Published
2021
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2. On Guaranteeing Schedulability of Periodic Real-Time Hardware Tasks Under ReconOS

Author

Clausing, Lennart, Guettatfi, Zakarya, Kaufmann, Paul, Lienen, Christian, Platzner, Marco, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Palumbo, Francesca, editor, Keramidas, Georgios, editor, Voros, Nikolaos, editor, and Diniz, Pedro C., editor

Published
2023
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3. Frequency-domain optical coherence tomography with undetected mid-infrared photons

Author

Vanselow, Aron, Kaufmann, Paul, Zorin, Ivan, Heise, Bettina, Chrzanowski, Helen M., and Ramelow, Sven

Subjects
Physics - Optics, Quantum Physics
Abstract

Mid-infrared light scatters much less than shorter wavelengths, allowing greatly enhanced penetration depths for optical imaging techniques such as optical coherence tomography (OCT). However, both detection and broadband sources in the mid-IR are technologically challenging. Interfering entangled photons in a nonlinear interferometer enables sensing with undetected photons making mid-IR sources and detectors obsolete. Here we implement mid-infrared frequency-domain OCT based on ultra-broadband entangled photon pairs. We demonstrate 10 ${\mu}$m axial and 20 ${\mu}$m lateral resolution 2D and 3D imaging of strongly scattering ceramic and paint samples. Together with $10^6$ times less noise scaled for the same amount of probe light and also vastly reduced footprint and technical complexity this technique can outperform conventional approaches with classical mid-IR light.

Published
2020

4. COVID-19: A Survey on Public Medical Imaging Data Resources

Author

Kalkreuth, Roman and Kaufmann, Paul

Subjects
Electrical Engineering and Systems Science - Image and Video Processing
Abstract

This regularly updated survey provides an overview of public resources that offer medical images and metadata of COVID-19 cases. The purpose of this survey is to simplify the access to open COVID-19 image data resources for all scientists currently working on the coronavirus crisis.

Published
2020

5. Ultra-broadband SPDC for spectrally far separated photon pairs

Author

Vanselow, Aron, Kaufmann, Paul, Chrzanowski, Helen M., and Ramelow, Sven

Subjects
Quantum Physics, Physics - Optics
Abstract

Generating photon pairs via spontaneous parametric down-conversion (SPDC) in nonlinear crystals is important for a wide range of quantum optics experiments with spectral properties such as their bandwidths often being a crucial concern. Here, we show the generic existence of particular phase-matching conditions in quasi-phase matched KTP, MgO:LN and SLT crystals that lead to ultra-broadband, widely non-degenerate photon pairs. It is based on the existence of group-velocity matched, far apart wavelength pairs and for 2 mm long crystals results in SPDC bandwidths between 15 and 25 THz (FWHM) for photon pairs with the idler photon in the technologically relevant mid-IR range 3-5 {\mu}m and the signal photon in the NIR below 1100 nm. We experimentally demonstrate this type of broadband phase-matching in ppKTP crystals for photon pairs centered at 800 nm and 3800 nm and measure a bandwidth of 15 THz. This novel method of generating broadband photon-pairs will be highly beneficial for SPDC-based imaging, spectroscopy, refractometry and OCT with undetected mid-IR photons., Comment: References added

Published
2019
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8. Optimization of Application-Specific L1 Cache Translation Functions of the LEON3 Processor

Author

Ho, Nam, Kaufmann, Paul, Platzner, Marco, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Abraham, Ajith, editor, Jabbar, M. A., editor, Tiwari, Sanju, editor, and Jesus, Isabel M. S., editor

Published
2021
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10. Attorney demands for protected psychological test information: Is access necessary for cross examination or does it lead to misinformation? An interorganizational* position paper

Author

Boone, Kyle Brauer, primary, Kaufmann, Paul M., additional, Sweet, Jerry J., additional, Leatherberry, David, additional, Beattey, Robert A., additional, Silva, Delia, additional, Victor, Tara L., additional, Boone, Rodney P., additional, Spector, Jack, additional, Hebben, Nancy, additional, Hanks, Robin A., additional, and James, Joette, additional

Published
2024
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11. Optimal and Greedy Heuristic Approaches for Scheduling and Mapping of Hardware Tasks to Reconfigurable Computing Devices

Author

Guettatfi, Zakarya, Kaufmann, Paul, Platzner, Marco, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Rincón, Fernando, editor, Barba, Jesús, editor, So, Hayden K. H., editor, Diniz, Pedro, editor, and Caba, Julián, editor

Published
2020
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13. Increased trial-to-trial similarity and reduced temporal overlap of muscle synergy activation coefficients manifest during learning and with increasing movement proficiency.

Author

Kaufmann, Paul, Koller, Willi, Wallnöfer, Elias, Goncalves, Basilio, Baca, Arnold, and Kainz, Hans

Subjects
*MOTOR learning, *ELECTROMYOGRAPHY
Abstract

Muscle synergy analyses are used to enhance our understanding of motor control. Spatially fixed synergy weights coordinate multiple co-active muscles through activation commands, known as activation coefficients. To gain a more comprehensive understanding of motor learning, it is essential to understand how activation coefficients vary during a learning task and at different levels of movement proficiency. Participants walked on a line, a beam, and learned to walk on a tightrope—tasks that represent different levels of proficiency. Muscle synergies were extracted from electromyography signals across all conditions and the number of synergies was determined by the knee-point of the total variance accounted for (tVAF) curve. The results indicated that the tVAF of one synergy decreased with task proficiency, with the tightrope task resulting in the highest tVAF compared to the line and beam tasks. Furthermore, with increasing proficiency and after a learning process, trial-to-trial similarity increased and temporal overlap of synergy activation coefficients decreased. Consequently, we propose that precise adjustment and refinement of synergy activation coefficients play a pivotal role in motor learning. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Forensic neuropsychological assessment.

Author

Marcopulos, Bernice A., Kaufmann, Paul, and Patel, Anisha C.

Subjects
*FORENSIC neuropsychology, *NEUROPSYCHOLOGICAL tests, *NEUROPSYCHOLOGY, *FORENSIC medicine, *COGNITION disorders
Abstract

With its firm establishment as a neuropsychology subspecialty, forensic neuropsychological assessment is integral to many criminal and civil forensic evaluations. In addition to evaluating cognitive deficits, forensic neuropsychologists can provide reliable information regarding symptom magnification, malingering, and other neurocognitive and psychological issues that may impact the outcome of a particular legal case. This article is an overview and introduction to neuropsychological assessment in the forensic mental health context. Major issues impacting the current practice of forensic neuropsychology are summarized, and several examples from case law are highlighted. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Parametrizing Cartesian Genetic Programming: An Empirical Study

Author

Kaufmann, Paul, Kalkreuth, Roman, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Kern-Isberner, Gabriele, editor, Fürnkranz, Johannes, editor, and Thimm, Matthias, editor

Published
2017
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23. Experiential Instruction of Listening for College Students: Theoretical and Practical Approaches to Teaching Listening. Evaluating Listening Texts.

Author

Kaufmann, Paul

Abstract

Eight college listening texts were selected and evaluated by the following criteria: organization, supporting material, and readability. Text organization was assessed by preface material, table of contents, index, and references. Text supporting material was evaluated by the use of hard data, soft data, visual aids, and bibliographies. Text readability was judged by transitions, tone, visual structure, and reading level. Worksheets were developed for each of the criteria, and numerical scores were assigned to each of the texts evaluated. (Worksheets for evaluating the texts, summaries of data, and a rank order of the eight texts are included.) (Author)

Published
1993

24. Psychophysiological stress response after a 6-week Mindful Self-Compassion training in psychiatric rehabilitation inpatients: a randomized post-test only study

Author

Andorfer, Andrea, primary, Kraler, Sabina, additional, Kaufmann, Paul, additional, Pollheimer, Ewald, additional, Spah, Christoph, additional, Fuchshuber, Jürgen, additional, Rominger, Christian, additional, Traunmüller, Claudia, additional, Schwerdtfeger, Andreas, additional, and Unterrainer, Human-Friedrich, additional

Published
2023
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31. Forensic Neuropsychology

Author

Sweet, Jerry J., primary, Kaufmann, Paul M., additional, Ecklund-Johnson, Eric, additional, and Malina, Aaron C., additional

Published
2017
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39. Coping with Resource Fluctuations: The Run-time Reconfigurable Functional Unit Row Classifier Architecture

Author

Knieper, Tobias, Kaufmann, Paul, Glette, Kyrre, Platzner, Marco, Torresen, Jim, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Tempesti, Gianluca, editor, Tyrrell, Andy M., editor, and Miller, Julian F., editor

Published
2010
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41. A Comparison of Evolvable Hardware Architectures for Classification Tasks

Author

Glette, Kyrre, Torresen, Jim, Kaufmann, Paul, Platzner, Marco, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Hornby, Gregory S., editor, Sekanina, Lukáš, editor, and Haddow, Pauline C., editor

Published
2008
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44. Toward Self-adaptive Embedded Systems: Multi-objective Hardware Evolution

Author

Kaufmann, Paul, Platzner, Marco, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Lukowicz, Paul, editor, Thiele, Lothar, editor, and Tröster, Gerhard, editor

Published
2007
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49. Official position of the American Academy of Clinical Neuropsychology on test security

Author

Boone, Kyle Brauer, primary, Sweet, Jerry J., additional, Byrd, Desiree A., additional, Denney, Robert L., additional, Hanks, Robin A., additional, Kaufmann, Paul M., additional, Kirkwood, Michael W., additional, Larrabee, Glenn J., additional, Marcopulos, Bernice A., additional, Morgan, Joel E., additional, Paltzer, June Yu, additional, Rivera Mindt, Monica, additional, Schroeder, Ryan W., additional, Sim, Anita H., additional, and Suhr, Julie A., additional

Published
2022
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