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arXiv 2020年

作者： Eklund, Anders J. Dvornik, Mykola Qejvanaj, Fatjon Jiang, Sheng Chung, Sunjae Åkerman, Johan Gunnar Malm, B. Department of Physics University of Oslo Box 1048 Blindern Oslo0316 Norway Department of Physics University of Gothenburg Gothenburg412 96 Sweden NanOsc AB Electrum 205 Kista164 40 Sweden Department of Applied Physics School of Engineering Sciences KTH Royal Institute of Technology Electrum 229 Kista164 40 Sweden Department of Physics Education Korea National University of Education Cheongju28173 Korea Republic of Division of Electronics and Embedded Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Electrum 229 Kista164 40 Sweden

We investigate the origin of the experimentally observed varying current-frequency nonlinearity of the propagating spin wave mode in nano-contact spin torque oscillators. Nominally identical devices with 100 nm diameter are characterized by electrical microwave measurements and show large variation in the generated frequency as a function of drive current. This quantitative and qualitative device-to-device variation is described in terms of continuous and discontinuous nonlinear transitions between linear current intervals. The thin film grain microstructure in our samples is determined using atomic force and scanning electron microscopy to be on the scale of 30 nm. Micromagnetic simulations show that the reflection of spin waves against the grain boundaries results in standing wave resonance configurations. For a simulated device with a single artificial grain, the frequency increases linearly with the drive current until the decreased wavelength eventually forces another spin wave anti-node to be formed. This transition results in a discontinuous step in the frequency versus current relation. Simulations of complete, randomly generated grain microstructures additionally shows continuous nonlinearity and a resulting device-to-device variation in frequency that is similar to the experimental levels. The impact of temperature from 4 K to 300 K on the resonance mode-transition nonlinearity and frequency noise is investigated using simulations and it is found that the peak levels of the spectral linewidth as a function of drive current agrees quantitatively with typical levels found in experiments at room temperature. Copyright © 2020, The Authors. All rights reserved.

关键词： Scanning electron microscopy

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Driving path stability in VANETs

arXiv

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arXiv 2019年

作者： Laroui, Mohammed Sellami, Akrem Nour, Boubakr Moungla, Hassine Afifi, Hossam Hacene, Sofiane B. Evolutionary Engineering & Distributed Information Systems Laboratory Djillali Liabes University Sidi Bel Abbes Algeria LIPADE Paris Descartes University Sorbonne Paris Cite Paris France School of Computer Science Beijing Institute of Technology Beijing China UMR 5157 CNRS Institute Mines Telecom Telecom SudParis Nano-Innov CEA Saclay France

—Vehicular Ad Hoc Network has attracted both research and industrial community due to its benefits in facilitating human life and enhancing the security and comfort. However, various issues have been faced in such networks such as information security, routing reliability, dynamic high mobility of vehicles, that influence the stability of communication. To overcome this issue, it is necessary to increase the routing protocols performances, by keeping only the stable path during the communication. The effective solutions that have been investigated in the literature are based on the link prediction to avoid broken links. In this paper, we propose a new solution based on machine learning concept for link prediction, using LR and Support Vector Regression (SVR) which is a variant of the Support Vector Machine (SVM) algorithm. SVR allows predicting the movements of the vehicles in the network which gives us a decision for the link state at a future time. We study the performance of SVR by comparing the generated prediction values against real movement traces of different vehicles in various mobility scenarios, and to show the effectiveness of the proposed method, we calculate the error rate. Finally, we compare this new SVR method with Lagrange interpolation solution. Copyright © 2019, The Authors. All rights reserved.

关键词： Industrial research

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Work in Progress – Establishing a Master Program in Cyber Physical systems: Basic Findings and Future Perspectives

Work in Progress – Establishing a Master Program in Cyber P...

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International Conference on Promising Electronic Technologies (ICPET)

作者： Isam Ishaq Rashid Jayousi Salaheddin Odeh Ezzaldeen Edwan Asmaa Shaheen Mohamed Elnaggar Ahmed Elagha Samy Salamah Christian Weber Hasan Abu Rasheed Raimund Kirner Martina Doolan Hamidreza Ahmadian Roman Obermaisser Dhiah el Diehn I. Abou-Tair Ala Khalifeh Sahel Alouneh Zaid Alhalhouli Khalid Alemerien Faiez Gargouri Bassem Bouaziz Nadia Aloui Mohammad Saleh Computer Engineering and Science Departments Al-Quds University Jerusalem Palestine Engineering Program and Computer Department Palestine Technical College - Deir El-Balah Deir El-Balah Palestine Institute of Knowledge Based Systems & Knowledge Management University of Siegen Siegen Germany University of Siegen Siegen Germany School of Engineering and Computer Science University of Hertfordshire Hatfield UK Chair of Embedded Systems University of Siegen Siegen Germany German Jordanian University Amman Jordan School of Electrical Engineering and Information Technology German Jordanian University Amman Jordan Computer and Information Technology Department Tafila Technical University Tafila Jordan Higher Institute of Computer Science and Multimedia University of Sfax Sfax Tunisia Higher Institute of Applied Sciences and Technology of Mateur University of Carthage Mateure Tunisia KTH Royal Institute of Technology Stockholm Sweden

This paper reports on the basic findings and future perspectives of a capacity building project funded by the European Union. The International Master of science on Cyber Physical systems (MS@CPS) is a collaborative project that aims to establish a master program in cyber physical systems (CPS). A consortium composed of nine partners proposed the project. Three partners are European and from Germany, UK and Sweden; while the other six partners are from the South Mediterranean region and include: Palestine, Jordan and Tunisia. The consortium is led by the University of Siegen in Germany who also manages the implementation of the work packages. CPS is an emerging engineering subject with significant economic and societal implications, which motivated the consortium to propose the establishment of a master program to offer educational and training opportunities at graduate level in the fields of CPS. In this paper, CPS as a field of study is presented with an emphasis on its importance, especially with regard to meeting local needs. A brief description of the project is presented in conjunction with the methodology for developing the courses and their learning outcomes.

关键词： computer science Internet of Things Industries Knowledge engineering embedded systems Europe Collaboration

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Traffic control system for vehicles on Indian roads using raspberry Pi

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IOP Conference Series: Materials science and Engineering 2020年第3期981卷

作者： Bura Vijay Kumar Seena Naik Korra N Swathi D. Kothandaraman Nagender Yamsani Yerrolla Chanti Member Center for Embedded Systems & Internet of Things Department of Computer Science and Engineering S R University Warangal Telangana Department of Computer Science and Engineering S R University Warangal Telangana Sumathi Reddy Institute of Technology for Women Warangal Telangana India Member Center for AI & Deep Learning Department of Computer Science and Engineering S R Engineering College Warangal Telangana India Department of Computer Science and Engineering S R Engineering College Warangal Telangana India

In India at the roads the vehicles were growing because of the increase of population and controlling of traffic is one of the tough duties for the individuals who control the traffic. The everyday traffic congestion at crucial junctions becomes more issues for the emergency automobiles and ought to wait for until inexperienced signal. This results the growth in pollution ranges and wastage of time, pollutants stages may boom to a huge scale. Previously the traffic control strategies used like magnetic loop detectors, induction loop detectors are buried on the street aspect provide the constrained visitors information and necessitate separate tracking structures for site traffic counting and for traffic surveillance. Right here the undertaking proposes to enforce a synthetic density traffic manipulate gadget using photo processing and Raspberry pi.

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On the Transcriptomic Signature and General Stress State Associated with Aneuploidy

arXiv

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arXiv 2020年

作者： Tsai, Hung-Ji Nelliat, Anjali R. Kucharavy, Andrei Choudhury, Mohammad Ikbal Sun, Sean X. Schatz, Michael C. Li, Rong Institute of Microbiology and Infections School of Biosciences University of Birmingham BirminghamB15 2TT United Kingdom Department of Systems Biology Harvard Medical School BostonMA02115 United States Distributed Computing Laboratory School of Computerand communication Sciences Ecole Polytechnique Federale de Lausanne Lausanne Switzerland Department of Mechanical Engineering Johns Hopkins University BaltimoreMD21218 United States Department of Computer Science Johns Hopkins University BaltimoreMD21218 United States Center for Cell Dynamics Department of Cell Biology Johns Hopkins University School of Medicine BaltimoreMD21205 United States Mechanobiology Institute Department of Biological Science National University of Singapore Singapore117411 Singapore

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Practical Evaluation of Cooperative Communication for Ultra-Reliability and Low-Latency

Practical Evaluation of Cooperative Communication for Ultra-...

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IEEE International Symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Martin Serror Sebastian Vaaßen Klaus Wehrle James Gross Chair of Communication and Distributed Systems RWTH Aachen University Germany School of Electrical Engineering & Computer Science KTH Royal Institute of Technology Sweden

Existing wireless communication systems are not able to meet the stringent requirements for critical machine-to-machine communications regarding ultra-reliability and low-latency. Since increasing the communication reliability often comes at the price of increasing the latency as well, new mechanisms must be proposed that consider both challenges together. A promising approach, according to analytical work, is to increase the reliability by using cooperative diversity, where all stations within range help each other in the transmission process. Theoretical analyses, however, only provide a limited insight regarding the actual performance due to the strong assumptions they make to model such complex systems. In this paper, we thus evaluate the practical feasibility of ultra-reliable low-latency communication through cooperation by designing a data link protocol that incorporates a best relay selection mechanism. We implement our protocol in a real-world testbed, consisting of software-defined radios, to gain a better understanding of how future ultra-reliable low-latency systems should be designed and implemented. Our measurement campaigns show that at a given low target latency of 1 ms, we achieve a packet error rate between 10 -5 and 10 -7 with a standard 802.11a physical layer.

关键词： Reliability Relays Protocols Wireless communication Wireless sensor networks Time division multiple access Schedules

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Achieving efficient realization of kalman filter on CGRA through algorithm-architecture co-design

arXiv

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arXiv 2018年

作者： Merchant, Farhad Vatwani, Tarun Chattopadhyay, Anupam Raha, Soumyendu Nandy, S.K. Narayan, Ranjani Institute for Communication Technologies and Embedded Systems RWTH Aachen University Germany Hardware and Embedded Systems Lab Nanyang Technological University Singapore Scientific Computation Laboratory Indian Institute of Science Bangalore India Computer Aided Design Laboratory Indian Institute of Science Bangalore India Morphing Machines Pvt. Ltd

In this paper, we present efficient realization of Kalman Filter (KF) that can achieve up to 65% of the theoretical peak performance of underlying architecture platform. KF is realized using Modified Faddeeva Algorithm (MFA) as a basic building block due to its versatility and REDEFINE Coarse Grained Reconfigurable Architecture (CGRA) is used as a platform for experiments since REDEFINE is capable of supporting realization of a set algorithmic compute structures at run-time on a Reconfigurable Data-path (RDP). We perform several hardware and software based optimizations in the realization of KF to achieve 116% improvement in terms of Gflops over the first realization of KF. Overall, with the presented approach for KF, 4-105x performance improvement in terms of Gflops/watt over several academically and commercially available realizations of KF is attained. In REDEFINE, we show that our implementation is scalable and the performance attained is commensurate with the underlying hardware resources. Copyright © 2018, The Authors. All rights reserved.

关键词： Kalman filters

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Network Formation for Industrial IoT: Evaluation, Limits and Recommendations

Network Formation for Industrial IoT: Evaluation, Limits and...

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IEEE International Conference on Emerging Technologies and Factory Automation

作者： Dario Fanucchi Barbara Staehle Rudi Knorr Department of Computer Science University of Augsburg Augsburg Germany Department of Computer Science University of Applied Sciences Konstanz Konstanz Germany Systems and Communication Technologies ESK Fraunhofer Institute for Embedded Munich Germany

An open standardized protocol stack proposed by IETF is nowadays emerging in industrial wireless communication. Main building blocks are TSCH at MAC layer and RPL as routing protocol. This standard architecture is able to replace proprietary technology and to guarantee a timely, reliable and energy efficient communication. However, IETF can not offer a one-size-fits-all solution. Therefore, implementers of industrial IoT have to correctly set the parameters of the protocols in this stack, adapting it to the application requirements and on the physical topology. This paper focuses on the network formation procedure proposed by IETF 6TiSCH working group, a mandatory phase before nodes may transmit any sensed data. We evaluate through simulations the impact of TSCH- and RPL-parameters on the duration of and the energy consumed for the network formation process. We describe how to avoid an unsuccessful network formation and we give guidelines for an appropriate parameter setting, depending on typical network topologies.

关键词： TSCH RPL 6TiSCH Performance Network formation

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Perspectives for self-driving labs in synthetic biology

arXiv

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arXiv 2022年

作者： Martin, Hector Garcia Radivojevic, Tijana Zucker, Jeremy Bouchard, Kristofer Sustarich, Jess Peisert, Sean Arnold, Dan Hillson, Nathan Babnigg, Gyorgy Marti, Jose Manuel Mungall, Christopher J. Beckham, Gregg T. Waldburger, Lucas Carothers, James Sundaram, ShivShankar Agarwal, Deb Simmons, Blake A. Backman, Tyler Banerjee, Deepanwita Tanjore, Deepti Ramakrishnan, Lavanya Singh, Anup Lawrence Berkeley National Laboratory Biological Systems and Engineering Division BerkeleyCA United States Department of Energy Agile BioFoundry EmeryvilleCA United States Joint BioEnergy Institute EmeryvilleCA United States BCAM Basque Center for Applied Mathematics Bilbao Spain Lawrence Berkeley National Laboratory Scientific Data Division BerkeleyCA United States Helen Wills Neuroscience Institute Redwood Center for Theoretical Neuroscience BerkeleyCA United States Lawrence Berkeley National Laboratory Energy Storage and Distributed Resources Division BerkeleyCA United States University of California Davis Department of Computer Science DavisCA United States Global Security Computing Applications Division Lawrence Livermore National Laboratory LivermoreCA United States Engineering Directorate Lawrence Livermore National Laboratory LivermoreCA United States Center for Bioengineering Lawrence Livermore National Laboratory LivermoreCA United States Department of Chemical Engineering Molecular Engineering & Sciences Institute Center for Synthetic Biology University of Washington SeattleWA United States Biosciences Division Argonne National Laboratory ArgonneIL United States Advanced Biofuels and Bioproducts Process Development Unit Lawrence Berkeley National Laboratory BerkeleyCA United States Biomaterials and Biomanufacturing Division Sandia National Laboratories LivermoreCA United States Earth and Biological Sciences Division Pacific Northwest National Laboratories RichlandWA United States Resources and Enabling Sciences Center National Renewable Energy Laboratory GoldenCO80401 United States Department of Bioengineering University of California BerkeleyCA United States

Self-driving labs (SDLs) combine fully automated experiments with artificial intelligence (AI) that decides the next set of experiments. Taken to their ultimate expression, SDLs could usher a new paradigm of scientific research, where the world is probed, interpreted, and explained by machines for human benefit. While there are functioning SDLs in the fields of chemistry and materials science, we contend that synthetic biology provides a unique opportunity since the genome provides a single target for affecting the incredibly wide repertoire of biological cell behavior. However, the level of investment required for the creation of biological SDLs is only warranted if directed towards solving difficult and enabling biological questions. Here, we discuss challenges and opportunities in creating SDLs for synthetic biology. © 2022, CC BY.

关键词： Synthetic biology

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The Future of Cloud Computing: Opportunities, Challenges and Research Trends

The Future of Cloud Computing: Opportunities, Challenges and...

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International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud) (I-SMAC)

作者： Amanpreet Kaur V.P. Singh Sukhpal Singh Gill Computer Science and Engineering Department Thapar Institute of Engineering and Technology Patiala Punjab India Cloud Computing and Distributed Systems (CLOUDS) Laboratory School of Computing and Information Systems The University of Melbourne Australia

ISBN: (纸本)9781538614433;9781538614426

In a cloud computing environment, datacenter consists of number of servers, cooling and power delivery equipment's that require enormous measure of computational energy to drive complex frameworks. Due to the rising demand of the computation power, datacenter has become the hub for significant increase in the power consumption, heat dissipation and rise in temperature of the servers. Cloud datacenter's energy consumption has increased tremendously due to increase in the computation requirements of the user workload. Thus, saving energy has become an important concern to address. Researchers proposed different techniques to optimize the energy consumption. In this paper, we focus on different aspects of cloud computing for holistic management of cloud resources in an energy-efficient, reliable and sustainable manner. We recognized different opportunities, identified research challenges and propose possible future research directions for cloud computing.

关键词： Servers Cloud computing Energy efficiency Energy consumption Data centers Processor scheduling Dynamic scheduling

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