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Proceedings of the 2018 International Conference on Embedded Wireless Systems and Networks

作者： Hannes Raddatz Arne Wall Dirk Timmermann Institute of Applied Microelectronics Computer Engineering University of Rostock

ISBN: (纸本)9780994988621

Current Smart Home systems are often based on proprietary security solutions which hide its inner functionality and possible vulnerabilities until they are exploited. Furthermore, an initial trusted instance in Smart Home networks is necessary to provide a seamless trust relationship to Smart Home appliances. Another issue is the stalling roll-out of Smart Metering systems due to its bad price-performance ratio for the customer. Therefore, we provide the lightweight security framework SafeBase, which solves both issues and provides a possible solution for a future Smart Home and Smart Metering systems. To achieve this goal, we employ state-of-the-art protocols like Constrained Application Protocol (CoAP), Object Security for Constrained RESTful Environments (OSCORE), Authentication and Authorization for Constrained Environments (ACE) and LwM2M.

关键词： COAP OSCORE Smart Home Smart Metering ACE

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Real-Time Capable Internet Technologies for Wired Communication in the Industrial IoT - a Survey

Real-Time Capable Internet Technologies for Wired Communicat...

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IEEE International Conference on Emerging Technologies and Factory Automation

作者： Peter Danielis Henning Puttnies Eike Schweissguth Dirk Timmermann Faculty of Computer Science and Electrical Engineering Institute of Applied Microelectronics and Computer Engineering Rostock Germany

This survey addresses the question if existing real-time capable Internet technologies for wired communication can meet the requirements of future industrial IoT scenarios with a rising number of heterogeneous devices to be connected and increasing amounts of data to be exchanged in real-time. The development towards an industrial IoT is further referred to as Industry 4.0 in Germany and Industrial Internet in the USA, respectively. We first investigate selected widespread technologies at all layers of the ISO/OSI model with respect to their real-time capability, scalability and dynamic reconfiguration, standard compliance and platform complexity as well their capability to integrate non-real-time devices. On the one hand, we note that TSN technology at physical and link layer is standardized but exhibits very high platform complexity for the switches and is thus costly. Subsequently, it is hence discussed if purely software-based approaches can enable RT communication over Ethernet Moreover, even though TSN-enabled network components can enforce real-time behavior, scheduling and routing algorithms for computing the respective network configuration are not part of the TSN standards. Those algorithms could be executed on a central SDN controller to achieve high performance and real-time capability, however, the scalability of such a centralized approach is limited by the fact that corresponding algorithms have exponential computational complexity. Hence, one of the future research directions outlined proposes to trade off distributed against centralized scheduling and routing approaches with regard to scalability and dynamic reconfiguration, real-time capability, and platform complexity. We conclude there is a need for the advancement of existing and for the development of new, possibly hybrid, real-time capable approaches that combine the advantages of centralized and distributed solution in order to meet all requirements.

关键词： Real-time systems Scalability Internet Protocols Standards Hardware Complexity theory

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The numerical Calculations of Single-Diode Solar Cell Modeling Parameters

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Journal of Physics: Conference Series 2021年第1期1963卷

作者： Mohammed Rasheed Mustafa Nuhad Al-Darraji Suha Shihab Ahmed Rashid Taha Rashid Applied Sciences Department University of Technology Baghdad Iraq Department of Biology College of Sciences University of Al-Anbar Anbar Iraq Al Iraqia University College of Arts Baghdad Iraq Computer and Microelectronics System Faculty of Engineering University Technology Malaysia (UTM) Skudai 81310 Johor Bahru Malaysia

In this paper, we suggest and analyze two algorithms; a new Inverse Quadratic Interpolation and Illinois for solving nonlinear equation of a solar cell single diode type with initial value x0 and load resistance R varies from 1 to 5 Ω is implemented in MATLAB program. Using five numerical testes examples, the results secured reveal that the suggested algorithm has lesser iterations than the other method (Illinois method), so the accuracy and efficiency of the proposed method is the best.

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On the Solution of Nonlinear Equation for Photovoltaic Cell Using New Iterative Algorithms

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Journal of Physics: Conference Series 2021年第1期1999卷

作者： Mohammed Rasheed Osama Alabdali Suha Shihab Ahmed Rashid Taha Rashid Applied Sciences Department University of Technology Baghdad Iraq College of Education for Pure Sciences University Of Anbar Al-Anbar Iraq Al Iraqia University College of Arts Baghdad Iraq Computer and Microelectronics System Faculty of Engineering University Technology Malaysia (UTM) Skudai 81310 Johor Bahru Malaysia

Root finding is a basic example that still remnant an interest to several researchers. Several hybrid experiments are developed to obtain approximate solutions for nonlinear equations. Thus, this paper presents an analysis on numerical comparison between common method and the other methods. An evaluation iterative method MATLAB is utilized for this paper. Numerical and interpretative results prove that Dekker's Formula is acceptably efficient, accurate, and easy to use compared with other iterative methods.

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Highly valley-polarized singlet and triplet interlayer excitons in van der Waals heterostructure

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Physical Review B 2019年第4期100卷 041402(R)-041402(R)页

作者： Long Zhang Rahul Gogna G. William Burg Jason Horng Eunice Paik Yu-Hsun Chou Kyounghwan Kim Emanuel Tutuc Hui Deng Physics Department University of Michigan 450 Church Street Ann Arbor Michigan 48109-2122 USA Applied Physics Program University of Michigan 450 Church Street Ann Arbor Michigan 48109-1040 USA Microelectronics Research Center Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78758 USA

Two-dimensional semiconductors feature valleytronics phenomena due to locking of the spin and momentum valley of the electrons. However, the valley polarization is intrinsically limited in monolayer crystals by the fast intervalley electron-hole exchange. Heterobilayer crystals have been shown to have a longer exciton lifetime and valley depolarization time. Yet most reported valley polarization was low; the valley selection rules and mechanisms of valley depolarization remain controversial. Here, we show that nearly pure valley polarizations are achievable in high-quality heterostructures with precise momentum-valley alignment. Together with time-resolved and temperature dependence measurements, we furthermore identify both singlet and brightened triplet interlayer excitons with opposite valley polarizations, which originate from direct band-gap transitions and are localized at the Hhh atomic registry—corresponding to the band minima of the heterostructure. Our results also reveal ultrafast interlayer electron transfer and strongly suppressed interlayer exciton valley depolarization. Our results pave the way for using semiconductor heterobilayers to control valley selection rules for valleytronic applications.

关键词： Excitons Spin dynamics Valleytronics 2-dimensional systems Heterostructures Transition metal dichalcogenides Van der Waals systems Photoluminescence

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One for Multiple: Physics-informed Synthetic Data Boosts Generalizable Deep Learning for Fast MRI Reconstruction

arXiv

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arXiv 2023年

作者： Wang, Zi Yu, Xiaotong Wang, Chengyan Chen, Weibo Wang, Jiazheng Chu, Ying-Hua Sun, Hongwei Li, Rushuai Li, Peiyong Yang, Fan Han, Haiwei Kang, Taishan Lin, Jianzhong Yang, Chen Chang, Shufu Shi, Zhang Hua, Sha Li, Yan Hu, Juan Zhu, Liuhong Zhou, Jianjun Lin, Meijing Guo, Jiefeng Cai, Congbo Chen, Zhong Guo, Di Yang, Guang Qu, Xiaobo Department of Electronic Science Intelligent Medical Imaging R&D Center Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance National Institute for Data Science in Health and Medicine Xiamen University China Human Phenome Institute Fudan University China Philips Healthcare China Siemens Healthineers Ltd. China United Imaging Research Institute of Intelligent Imaging China Department of Nuclear Medicine Nanjing First Hospital China Shandong Aoxin Medical Technology Company China Department of Radiology The First Affiliated Hospital of Xiamen University China Department of Radiology Zhongshan Hospital Affiliated to Xiamen University China China Department of Cardiology Shanghai Institute of Cardiovascular Diseases Zhongshan Hospital Fudan University China Department of Radiology Zhongshan Hospital Fudan University China Department of Cardiovascular Medicine Heart Failure Center Ruijin Hospital Lu Wan Branch Shanghai Jiaotong University School of Medicine China Department of Radiology Ruijin Hospital Shanghai Jiaotong University School of Medicine China Medical Imaging Department The First Affiliated Hospital of Kunming Medical University China Xiamen Key Laboratory of Clinical Transformation of Imaging Big Data and Artificial Intelligence China Department of Applied Marine Physics and Engineering Xiamen University China Department of Microelectronics and Integrated Circuit Xiamen University China School of Computer and Information Engineering Xiamen University of Technology China Department of Bioengineering Imperial College London United Kingdom

Magnetic resonance imaging (MRI) is a widely used radiological modality renowned for its radiation-free, comprehensive insights into the human body, facilitating medical diagnoses. However, the drawback of prolonged scan times hinders its accessibility. The k-space undersampling offers a solution, yet the resultant artifacts necessitate meticulous removal during image reconstruction. Although Deep Learning (DL) has proven effective for fast MRI image reconstruction, its broader applicability across various imaging scenarios has been constrained. Challenges include the high cost and privacy restrictions associated with acquiring large-scale, diverse training data, coupled with the inherent difficulty of addressing mismatches between training and target data in existing DL methodologies. Here, we present a novel Physics-Informed Synthetic data learning framework for Fast MRI, called PISF. PISF marks a breakthrough by enabling generalized DL for multi-scenario MRI reconstruction through a single trained model. Our approach separates the reconstruction of a 2D image into many 1D basic problems, commencing with 1D data synthesis to facilitate generalization. We demonstrate that training DL models on synthetic data, coupled with enhanced learning techniques, yields in vivo MRI reconstructions comparable to or surpassing those of models trained on matched realistic datasets, reducing the reliance on real-world MRI data by up to 96%. Additionally, PISF exhibits remarkable generalizability across multiple vendors and imaging centers. Its adaptability to diverse patient populations has been validated through evaluations by ten experienced medical professionals. PISF presents a feasible and cost-effective way to significantly boost the widespread adoption of DL in various fast MRI applications. Importantly, it alleviates the ethical and practical challenges associated with in vivo human data acquisitions, opening new horizons for advancing fast MRI technologies. Copyright © 20

关键词： Magnetic resonance imaging

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Quantum Games and Interactive Tools for Quantum Technologies Outreach and Education

arXiv

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arXiv 2022年

作者： Seskir, Zeki C. Migdal, Piotr Weidner, Carrie Anupam, Aditya Case, Nicky Davis, Noah Decaroli, Chiara Ercan, İlke Foti, Caterina Gora, Pawel Jankiewicz, Klementyna La Cour, Brian R. Malo, Jorge Yago Maniscalco, Sabrina Naeemi, Azad Nita, Laurentiu Parvin, Nassim Scafirimuto, Fabio Sherson, Jacob F. Surer, Elif Wootton, James Yeh, Lia Zabello, Olga Chiofalo, Marilù Karlsruhe Institute of Technology ITAS Karlstraße 11 Karlsruhe76133 Germany Quantum Flytrap ul. Ceglowska 29 Warsaw01-809 Poland Quantum Engineering Technology Laboratories H.H. Wills Physics Laboratory Department of Electrical and Electronic Engineering University of Bristol BristolBS8 1FD United Kingdom Georgia Institute of Technology School of Literature Media and Communication 686 Cherry St NW AtlantaGA30313 United States The University of Texas at Austin Center for Quantum Research Applied Research Laboratories 10000 Burnet Rd AustinTX78758 United States National Quantum Computing Center Oxfordshire DidcotOX11 0GD United Kingdom TU Delft Department of Microelectronics Mekelweg 4 Delft2628 CD Netherlands QPlayLearn Aalto University InstituteQ - The Finnish Quantum Institute Department of Applied Physics AaltoFI-00076 11000 Finland Quantum AI Foundation Sanocka 9/103 Warsaw02-110 Poland University of Pisa Department of Physics Largo Bruno Pontecorvo 3 PisaI-56126 Italy University of Helsinki InstituteQ - The Finnish Quantum Institute Department of Physics Helsinki Finland Georgia Institute of Technology School of Electrical and Computer Engineering 777 Atlantic Drive NW AtlantaGA30332 United States Quarks Interactive Strada Bailor 93a Miercurea-Ciuc Harghita4500 Romania IBM Quantum IBM Research - Zurich Säumerstrasse 4 Rüschlikon8803 Switzerland ScienceAtHome Fuglesangs Allé 4 Aarhus8210 Denmark Aarhus University Institute for Physics and Astronomy Ny Munkegade 120 Aarhus8000 Denmark Middle East Technical University Graduate School of Informatics Department of Modeling and Simulation Üniversiteler Mah. Dumlupınar Blv. No:1 Ankara06800 Turkey University of Oxford Department of Computer Science Wolfson Building Parks Road OxfordOX1 3QD United Kingdom IBM Quantum IBM T. J. Watson Research Center Yorktown HeightsNY10598 United States Offenburg University of Applied Sciences Department of Business and Industrial Eng

In this article, we provide an extensive overview of a wide range of quantum games and interactive tools that have been employed by the community in recent years. The paper presents selected tools, as described by their developers. The list includes Hello Quantum, Hello Qiskit, Particle in a Box, Psi and Delta, QPlayLearn, Virtual Lab by Quantum Flytrap, Quantum Odyssey, ScienceAtHome, and The Virtual Quantum Optics Laboratory. Additionally, we present events for quantum game development: hackathons, game jams, and semester projects. Furthermore, we discuss the Quantum Technologies Education for Everyone (QUTE4E) pilot project, which illustrates an effective integration of these interactive tools with quantum outreach and education activities. Finally, we aim at providing guidelines for incorporating quantum games and interactive tools in pedagogic materials to make quantum technologies more accessible for a wider population. Copyright © 2022, The Authors. All rights reserved.

关键词： Quantum optics

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Photonic Funnels: Subdiffraction Limited Photonic Funneling of Light (Advanced Optical Materials 24/2020)

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Advanced Optical Materials 2020年第24期8卷 2070098-2070098页

作者： Kun Li Evan Simmons Andrew Briggs Leland Nordin Jiaming Xu Viktor Podolskiy Daniel Wasserman Electrical and Computer Engineering Microelectronics Research Center University of Texas at Austin Austin TX 78758 USA Department of Physics and Applied Physics University of Massachusetts Lowell Lowell MA 01854 USA

Efficient optical coupling between deep subwavelength and diffraction limited domains can open numerous applications in microscopy, spectroscopy, communications, and sensing. In article number 2001321, Viktor Podolskiy, Daniel Wasserman and co‐workers experimentally demonstrate and numerically investigate photonic funnels, a platform that enables such coupling. The funnels comprise hyperbolic metamaterial cores that support propagation of strongly confined modes and highly conductive cladding that prevents leakage of light through the structure's ides. The funnels are realized in the important mid‐infrared frequency range with a semiconductor‐based designer metal platform.

关键词： infrared metamaterials nano‐optics subwavelength optics

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Realizing Content-Based Publish/Subscribe with P4

Realizing Content-Based Publish/Subscribe with P4

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IEEE Conference on Network Function Virtualization and Software Defined Networks (NFV-SDN)

作者： Christian Wernecke Helge Parzyjegla Gero Mühl Peter Danielis Dirk Timmermann Institute of Computer Science University of Rostock Rostock Germany Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

ISBN: (纸本)9781538682821

Publish/subscribe communication is used in distributed applications to loosely couple publishers and subscribers of notifications. Especially for content-based publish/subscribe, distributing notifications from publishers to subscribers with a matching subscription is a crucial and complex task, since a notification's set of receivers can potentially comprise any combination of subscribers. Various strategies are known for this task and each tackles the trade-off between efficiency and flexibility differently by applying unicast, network-assisted multi-cast, or application-layer multicast. However, with the advent of software-defined networking, new distribution strategies can now be realized combining the efficiency of network-assisted multicast with the flexibility of application-layer *** this paper, we show that SDN and, in particular, the P4 programming language is well suited to implement notification distribution flexibly and efficiently. We present novel distribution strategies that place the information necessary for distributing a notification in the notification packet itself. We evaluate the strategies using an emulated network and compare them to OpenFlow multicast, application-layer multicast, unicast, and broadcast. The evaluation investigates packet size, consumed network bandwidth, table lookups, and notification delay. The results show that our strategies reach the intended goals.

关键词： Switches Pipelines Multiprotocol label switching Unicast Distribution strategy Encoding

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Interlayer Exciton Laser with Extended Spatial Coherence in an Atomically-Thin Heterostructure

arXiv

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arXiv 2019年

作者： Paik, Eunice Y. Zhang, Long Burg, G. William Gogna, Rahul Tutuc, Emanuel Deng, Hui Department of Physics University of Michigan Ann ArborMI48109-2122 United States Microelectronics Research Center Department of Electrical and Computer Engineering AustinTX78758 Applied Physics Program University of Michigan Ann ArborMI48109-1040 United States

Two-dimensional semiconductors have emerged as a new class of materials for nanophotonics for their strong exciton-photon interaction and flexibility for engineering and integration. Taking advantage of these properties, we engineer an efficient lasing medium based on dipolar interlayer excitons, in rotationally aligned atomically thin heterostructures. Lasing is measured from a transition metal dichalcogenide hetero-bilayer integrated in a silicon nitride grating resonator. A sharp increase in the spatial coherence of the emission was observed across the lasing threshold. The work establishes interlayer excitons in two-dimensional heterostructures as a silicon-compatible coherent medium. With electrically tunable light-matter interaction strength and long-range dipolar interactions, these interlayer excitons promise both applications to low-power, ultrafast laser and modulators and rich many-body quantum phenomena. Copyright © 2019, The Authors. All rights reserved.

关键词： Excitons

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