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Cerebral cortex communications 2020年第1期1卷 tgaa078页

作者： Yufen Chen Amy A Herrold Zoran Martinovich Sumra Bari Nicole L Vike Anne J Blood Alexa E Walter Jaroslaw Harezlak Peter H Seidenberg Manish Bhomia Barbara Knollmann-Ritschel Khrystyna Stetsiv James L Reilly Eric A Nauman Thomas M Talavage Linda Papa Semyon Slobounov Hans C Breiter Center for Translational Imaging Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA. Edward Hines Jr. VA Hospital Research Service Hines IL 60141 USA. Mental Health Services and Policy Program Department of Psychiatry and Behavioral Sciences Northwestern University Feinberg School of Medicine Chicago IL 60611 USA. Warren Wright Adolescent Center Department of Psychiatry and Behavioral Sciences Feinberg School of Medicine Northwestern University Chicago IL 60611 USA. Mood and Motor Control Laboratory Departments of Neurology and Psychiatry Massachusetts General Hospital and Harvard Medical School Boston MA 02129 USA. Department of Kinesiology Pennsylvania State University University Park PA 16802 USA. Department of Epidemiology and Biostatistics Indiana University Bloomington IN 47405 USA. Departments of Orthopaedics & Rehabilitation and Family & Community Medicine Penn State College of Medicine Hershey PA 17033 USA. Department of Pathology Uniformed Services University of the Health Sciences Bethesda MD USA. Weldon School of Biomedical Engineering Purdue University West Lafayette IN 47907 USA. School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USA. Department of Emergency Medicine Orlando Regional Medical Center Orlando FL USA.

Transcriptomics, regional cerebral blood flow (rCBF), and a virtual reality-based spatial motor task were integrated using mediation analysis in a novel demonstration of "imaging omics." Data collected in National Collegiate Athletic Association (NCAA) Division I football athletes cleared for play before in-season training showed significant relationships in 1) elevated levels of miR-30d and miR-92a to elevated putamen rCBF, 2) elevated putamen rCBF to compromised Balance scores, and 3) compromised Balance scores to elevated microRNA (miRNA) levels. rCBF acted as a consistent mediator variable (Sobel's test < 0.05) between abnormal miRNA levels and compromised Balance scores. Given the involvement of these miRNAs in inflammation and immune function and that vascular perfusion is a component of the inflammatory response, these findings support a chronic inflammatory model in these athletes with 11 years of average football exposure. rCBF, a systems biology measure, was necessary for miRNA to affect behavior.

关键词： football athletes head acceleration events microRNAs postural control regional cerebral blood flow

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Self-injection Locked InAs/InP Quantum-dash Laser for High Capacity Optical Communication System

Self-injection Locked InAs/InP Quantum-dash Laser for High C...

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Conference on Lasers and Electro-Optics Pacific Rim

作者： M. A. Shemis M. T. A. Khan E. Alkhazraji A. M. Ragheb H. Fathallah S. Alshebeili M. Z. M. Khan Optoelectronics Research Laboratory Electrical Engineering Department King Fahd University of Petroleum and Minerals Dhahran-31261 Saudi Arabia KACST-TIC in Radio Frequency and Photonics for the e-Society (RFTONICS) Riyadh Saudi Arabia Computer Department of the College of Science of Bizerte University of Carthage Tunis Tunisia Department of Electrical Engineering King Saud University Riyadh Saudi Arabia

ISBN: (纸本)9781509062904

We report, for the first time to our knowledge, on the self-injection locking of chirped InAs/InP quantum-dash (QDash) lasers with ～6.5 nm locked Fabry-Perot mode tunability, in the L-band wavelength emission. The modes exhibited -30 dB side mode suppression ratio (SMSR) with ～8-9 dBm mode power. Generally, the locked mode SMSR and tunability is found to be limited by the L-band amplifier amplified spontaneous emission noise. This demonstration paves the potential deployment of widely tunable self-locked broadband QDash laser modes as sub-carriers' generator in the next generation high capacity fiber based and wireless optical networks.

关键词： Laser modes Optical feedback Optical networks Optical wireless communication Quantum well lasers Spontaneous emission

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Device development of gallium oxide MOSFETs grown by MOVPE on native substrates for high-voltage applications

Device development of gallium oxide MOSFETs grown by MOVPE o...

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2017 International Conference on Compound Semiconductor Manufacturing Technology, CS MANTECH 2017

作者： Moser, N.A. Chabak, K.D. Green, A.J. Walker, D.E. Tetlak, S.E. Heller, E. Crespo, A. Fitch, R.C. McCandless, J. Leedy, K.D. Baldini, M. Wagner, G. Via, G.D. Blevins, J.D. Jessen, G. Air Force Research Laboratory Sensors Dir. Wright-Patterson AFBOH45433 United States Department of Electrical and Computer Engineering George Mason University FairfaxVA22030 United States Wyle Laboratories Inc. 4200 Colonel Glenn Hwy BeavercreekOH45431 United States Air Force Research Laboratory Materials and Manufacturing Dir. Wright-Patterson AFBOH45433 United States Leibniz-Institut für Kristallzüchtung Max-Born-Strabe 2 BerlinD-12489 Germany

We summarize the development of β-Ga2O3 MOSFETs fabricated on homoepitaxy grown by metal organic vapor phase epitaxy including improvements in electrical performance through optimization of doping and thickness, and methods to reduce ohmic contact resistance. We present four development stages of MOSFET data showing progression of β-Ga2O3 MOSFETs toward high power and potentially high frequency power switching applications.

关键词： Ohmic contacts

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Headache and MRI Changes after Endovascular Treatment of a Cerebral Aneurysm

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Case reports in radiology 2019年第1期2019卷 6917902页

作者： Liv Jorunn Høllesli Martin W Kurz Gry Inger N Behzadi Tore Solbakken Svein Harald Mørkve Kathinka D Kurz Department of Radiology Stavanger University Hospital 4068 Stavanger Norway. Stavanger Medical Imaging Laboratory Stavanger University Hospital 4068 Stavanger Norway. Department of Neurology Stavanger University Hospital 4068 Stavanger Norway. Neuroscience Research Group Stavanger University Hospital 4068 Stavanger Norway. Department of Clinical Medicine University of Bergen 5020 Bergen Norway. Department of Neurosurgery Haukeland University Hospital 5021 Bergen Norway. Department of Radiology Haukeland University Hospital 5021 Bergen Norway. Department of Electrical Engineering and Computer Science University of Stavanger 4036 Stavanger Norway.

BACKGROUND:The main complications after endovascular therapy of intracranial aneurysms are aneurysm rupture and thromboembolic events. Yet, the widespread use of magnetic resonance imaging (MRI) in follow-up of these patients also demonstrates other, rarely known complications such as aseptic meningitis and foreign body reaction. CASE PRESENTATION:A small aneurysm in the right posterior communicating artery was treated with endovascular therapy in a 65 year old woman. Two weeks after successful interventional treatment, the patient developed a headache. On MRI performed five months after intervention, vasogenic edema was seen in the vascular territory of the right internal carotid artery. The edema and the symptoms diminished without specific treatment within a year. INTERPRETATION:The clinical and radiological presentation of this case are suggestive of a foreign body reaction, a treatable condition that radiologists and clinicians should be aware of.

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Structural “δ Doping” to Control Local Magnetization in Isovalent Oxide Heterostructures

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Physical Review Letters 2017年第19期119卷 197204-197204页

作者： E. J. Moon Q. He S. Ghosh B. J. Kirby S. T. Pantelides A. Y. Borisevich S. J. May Department of Materials Science and Engineering Drexel University Philadelphia Pennsylvania 19104 USA Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science Vanderbilt University Nashville Tennessee 37235 USA SRM Research Institute and Department of Physics and Nanotechnology SRM University Kattankulathur Tamil Nadu 603203 India Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland 20899 USA

Modulation and δ-doping strategies, in which atomically thin layers of charged dopants are precisely deposited within a heterostructure, have played enabling roles in the discovery of new physical behavior in electronic materials. Here, we demonstrate a purely structural “δ-doping” strategy in complex oxide heterostructures, in which atomically thin manganite layers are inserted into an isovalent manganite host, thereby modifying the local rotations of corner-connected MnO6 octahedra. Combining scanning transmission electron microscopy, polarized neutron reflectometry, and density functional theory, we reveal how local magnetic exchange interactions are enhanced within the spatially confined regions of suppressed octahedral rotations. The combined experimental and theoretical results illustrate the potential to utilize noncharge-based approaches to “doping” in order to enhance or suppress functional properties within spatially confined regions of oxide heterostructures.

关键词： Magnetism Heterostructures Magnetic multilayers Oxides Quantum wells Density functional theory High-resolution transmission electron microscopy Neutron reflectometry Physical vapor deposition

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Ultrafast spin-to-charge conversion at the surface of topological insulator thin films

arXiv

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arXiv 2018年

作者： Wang, Xinbo Cheng, Liang Zhu, Dapeng Wu, Yang Chen, Mengji Wang, Yi Zhao, Daming Boothroyd, Chris B. Lam, Yeng Ming Zhu, Jian-Xin Battiato, Marco Song, Justin C.W. Yang, Hyunsoo Chia, Elbert E.M. Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore Department of Electrical and Computer Engineering National University of Singapore 117576 Singapore School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Theoretical Division Center for Integrated Nanotechnologies Los Alamos National Laboratory NM87545 United States Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Institute of Solid State Physics Vienna University of Technology Vienna1040 Austria Institute of High Performance Computing Agency for Science Technology and Research 138632 Singapore

Topological insulators (TIs) provide a fascinating example where strong spin-orbit interaction leads to the formation of spin-momentum-locked (topological) surface states,[1,2] and are anticipated to mediate superior spin-charge conversion (SCC).[3,4] As a result, employing conventional steady-state transport set-ups, TIs have been exploited to exert spin orbit torque on the adjacent ferromagnetic (FM) layers,[5-12] as well as generate charge current from spin current.[13-19] However, these transport studies involved contact fabrication, required complicated data analysis to extract the spin-related component, and their signal is in the DC regime. Direct access to the dynamics of SCC - a crucial ingredient in optimizing TI based spintronic devices - remains conspicuously missing. The difficultly of tracking SCC dynamics stems from the need to address both the ultrafast timescales involved as well as obtain spin resolution simultaneously. Copyright © 2018, The Authors. All rights reserved.

关键词： Surface states

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Notice of Violation of IEEE Publication Principles: Application of LDPC codes on PUF error correction based on code-offset construction

Notice of Violation of IEEE Publication Principles: Applicat...

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International Conference on ASIC

作者： Kai Sun Yingjie Lao Weiqiang Liu Xiaohu You Chuan Zhang National Mobile Communications Research Laboratory Southeast University Nanjing China Lab of Efficient Architectures for Digital-communication and Signal-processing (LEADS) Department of Electrical and Computer Engineering Clemson University Clemson SC USA College of Electronic and Information Engineering NUAA Nanjing China

Notice of Violation of IEEE Publication Principles "Application of LDPC Codes on PUF Error Correction Based on Code-offset Construction" by Kai Sun, Yingjie Lao, Weiqiang Liu, Xiaohu You, and Chuan Zhang Proceedings of the IEEE 12th International Conference on ASIC (ASICON), October 2017, pp. 867-870 After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE's Publication Principles. This paper copies original text from the papers cited below. The original text was copied with references to the original author(s) and/or paper titles, but did not delineate sufficiently to identify the reused material. The first author, Kai Sun, was solely responsible for the misconduct, which was done without the knowledge of the other authors "On Error Correction for Physical Unclonable Functions" by Sven Puchinger, Sven Muelich, Martin Bossert, Matthias Hiller, Georg Sigl in the Proceedings of the International ITG Conference on Systems, Communications and Coding, February 2015 "A New Error Correction Scheme for Physical Unclonable Functions" by Sven Muelich, Martin Bossert in the Proceedings of the International ITG Conference on Systems, Communications and Coding, February 2017 As a newly emerging technology, physical unclonable functions (PUFs) have drawn a lot of attentions. For their cryptographic applications, error correction is an indispensable component to fight against environmental factors which influence PUFs' performance. Recently, BCH codes have been applied to the error correction part to enhance the stability of an cryptographic system using PUFs. In this paper, low-density parity-check (LDPC) codes are first used to correct errors caused by environmental factors and shown to perform better than BCH codes in some conditions. In addition, normalized minsum algorithm has been considered to balance the performance and complexity of LDPC decoding.

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Temporal and spectral manipulations of correlated photons using a time lens

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Physical Review A 2017年第4期96卷 043807-043807页

作者： Sunil Mittal Venkata Vikram Orre Alessandro Restelli Reza Salem Elizabeth A. Goldschmidt Mohammad Hafezi Joint Quantum Institute NIST/University of Maryland College Park Maryland 20742 USA Department of Electrical and Computer Engineering and IREAP University of Maryland College Park Maryland 20742 USA PicoLuz LLC Jessup Maryland 20794 USA U.S. Army Research Laboratory Adelphi Maryland 20783 USA

A common challenge in quantum information processing with photons is the limited ability to manipulate and measure correlated states. An example is the inability to measure picosecond-scale temporal correlations of a multiphoton state, given state-of-the-art detectors have a temporal resolution of about 100 ps. Here, we demonstrate temporal magnification of time-bin-entangled two-photon states using a time lens and measure their temporal correlation function, which is otherwise not accessible because of the limited temporal resolution of single-photon detectors. Furthermore, we show that the time lens maps temporal correlations of photons to frequency correlations and could be used to manipulate frequency-bin-entangled photons. This demonstration opens a new avenue to manipulate and analyze spectral and temporal wave functions of many-photon states.

关键词： Quantum measurements Quantum state engineering

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Performance Analysis of Dual-Hop DF Satellite Relaying over k-µ Shadowed Fading Channels

Performance Analysis of Dual-Hop DF Satellite Relaying over ...

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IEEE Conference on Wireless Communications and Networking

作者： Jiayi Zhang Xu Li Imran Shafique Ansari Ying Liu Khalid A. Qaraqe National Mobile Communications Research Laboratory Southeast University Nanjing China School of Electronic and Information Engineering Beijing Jiaotong University Beijing P. R. China Department of Electrical and Computer Engineering Texas A&M University at Qatar Doha Qatar

The satellite relaying system is a promising network architecture in next generation wireless communication systems, due to its large coverage and stability. In this paper, the performance of a dual-hop decode-and-forward based satellite relaying system over κ-μ shadowed fading channels is investigated, where a source earth station transmits information to a destination earth station via a satellite relay. We first obtain the exact closedform expressions of the outage probability of such a system in terms of bivariate confluent hypergeometric functions. By using a novel gamma approximation to the κ-μ shadowed distribution, the simple outage expression is derived. Moreover, the accurate expression of the average bit error rate (ABER) and the ergodic capacity are obtained in terms of Appell hypergeometric functions and hypergeometric functions, respectively. Again, with the help of the gamma approximation, we derive the approximate ABER and capacity expressions. In the high signal-to-noise ratio regime, the asymptotic ABER expression is obtained in terms of elementary functions. Finally, numerical and Monte-Carlo simulation results are provided to demonstrate the validity of the proposed unified expressions.

关键词： Satellites Fading channels Relays Rician channels Signal to noise ratio Bit error rate Performance analysis

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Geometric Cross-Modal Comparison of Heterogeneous Sensor Data

arXiv

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arXiv 2017年

作者： Tralie, Christopher J. Smith, Abraham Borggren, Nathan Hineman, Jay Bendich, Paul Zulch, Peter Harer, John Department of Electrical and Computer Engineering Duke University Department of Mathematics University of Wisconsin-Stout Geometric Data Analytics Inc. Geometric Data Analytics Inc. Department of Mathematics Duke University Geometric Data Analytics Inc. Air Force Research Laboratory

In this work, we address the problem of cross-modal comparison of aerial data streams. A variety of simulated automobile trajectories are sensed using two different modalities: Full-motion video, and radio-frequency (RF) signals received by detectors at various locations. The information represented by the two modalities is compared using self-similarity matrices (SSMs) corresponding to time-ordered point clouds in feature spaces of each of these data sources;we note that these feature spaces can be of entirely different scale and dimensionality. Several metrics for comparing SSMs are explored, including a cutting-edge time-warping technique that can simultaneously handle local time warping and partial matches, while also controlling for the change in geometry between feature spaces of the two modalities. We note that this technique is quite general, and does not depend on the choice of modalities. In this particular setting, we demonstrate that the cross-modal distance between SSMs corresponding to the same trajectory type is smaller than the cross-modal distance between SSMs corresponding to distinct trajectory types, and we formalize this observation via precision-recall metrics in experiments. Finally, we comment on promising implications of these ideas for future integration into multiple-hypothesis tracking systems. Copyright © 2017, The Authors. All rights reserved.

关键词： Trajectories

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