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Advanced Industrial Conference on Telecommunications/Service Assurance with Partial and Intermittent Resources Conference/E-Learning on Telecommunications Workshop AICT/SAPIR/ELETE 2005

作者： Farahmand, Farid Jue, Jason Vokkarane, Vinod Rodrigues, Joel J. P. C. Freire, Mário M. Dep of Elect. Engineering University of Texas at Dallas EC 31 P.O. Box 830668 Richardson TX 75083-0688 Dep. of Computer Science University of Texas at Dallas EC 31 P.O. Box 830668 Richardson TX 75083-0688 CIS University of Massachusetts at Dartmouth 285 Old Westport Road North Dartmouth MA 02747-2300 Department of Informatics University of Beira Interior R. Marques d'Avila e Bolama 6201-001 Covilhã Portugal

ISBN: (纸本)0769523889

This paper defines a new layered architecture for supporting optical burst switching in an optical core network. The architecture takes into account both the control plane as well as the data plane. The paper describes the functionality and the primary protocols that are required at each layer. This paper also explains how the layers interact with each other in the proposed architecture. © 2005 IEEE.

关键词： Telecommunication services

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Comparison of Detailed Occupancy Profile Generative Methods to Published Standard Diversity Profiles

Comparison of Detailed Occupancy Profile Generative Methods ...

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing, UIC-ATC

作者： Dimosthenis Ioannidis Marina Vidaurre-Arbizu César Martín-Gómez Stelios Krinidis Anna Adamopoulou Amaia Zuazua-Ros Dimitrios Tzovaras Spiridon Likothanassis Computer Engineering and Informatics University of Patras Greece Information Technologies Institute Centre for Research and Technology Hellas Thermi-Thessaloniki Greece Dep. of Construction Building Services and Structures Universidad de Navarra Pamplona Spain

Knowledge of the actual occupancy of a building is a main research interest for several domains. Building energy performance simulation software considers occupancy through the use of diversity profiles usually contained in predesigned templates. This paper aims to explore the extent of possible discrepancies between standard predefined occupancy diversity profiles, profiles extracted by business process modelling, profiles generated from real on field occupancy measurements. Occupancy measurements are obtained utilizing a novel robust, highly accurate real-time occupancy extraction system which is based on a depth cameras network. Results show that the incorporation of real accurate occupancy data, the appropriate understanding of the business processes that take place in building spaces have the potential to significantly enhance current Building Performance Simulation (BPS) software tools.

关键词： Buildings Business Schedules Cameras Standards Data mining Sensors

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The Correlation Between Architecture Smells, Package Stability and Reusability: A Case Study

The Correlation Between Architecture Smells, Package Stabili...

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Sciences and Techniques of Automatic Control and computer engineering MI-STA, IEEE International Maghreb Meeting of the Conference on

作者： Mrwan BenIdris Ehab A. Omar Elfallah Marwa Aslam Cheema Mohammed Salah Addin Alsma Tareq Ziad Kadiki Abdelfattah Elbarsha Dep. of Computer Science Faculty of Information Technology University of Benghazi Dept. of Software Engineering Faculty of Information Technology Libyan International Medical University Health Informatics Department Faculty of Public Health University of Benghazi

ISBN: (数字)9798350372632

ISBN: (纸本)9798350372649

the design decisions made in the architecture of a software system are essential to its maintainability, and thus its quality is of great importance. Architecture smells (ASs) can be used to identify any quality issues within the system. To further explore the relationships between ASs, stability, and reusability, Spearman correlation coefficients will be calculated. This paper seeks to examine the connection between architecture smells, software stability, and reusability. To do this, we utilized a dataset created by other researchers and conducted an empirical study of the associations between five types of architecture smells and software stability and reusability. This research is necessary as there is a lack of in-depth research on architecture smells and their relationship to software stability and reusability. We found a relationship between the presence of Feature Concentration in package and the stability and reusability of the package. Also, package's stability is affected by both Cyclic dependency and Unstable dependency. A slight positive correlation has been found between God Class and stability, as well as a very weak negative correlation between Unstable dependency and reusability. Finally, we found a slight negative correlation between package stability and reusability.

关键词： Correlation coefficient Correlation Codes Conferences computer architecture Software systems Software development management

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Fistula Condition Monitoring System by the Noise Changes Dynamics

Fistula Condition Monitoring System by the Noise Changes Dyn...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： N. I. Yumagulov D. A. Fedorov D. V. Topolsky Dep. for Education in Physics and Mathematics Nizhnevartovsk State University Nizhnevartovsk Russia Department of Informatics and Computer Engineering Surgut State University Surgut Russia Department of Electronic Computing Machines South Ural State University (NRU) Chelyabinsk Russia

The paper presents an automated system for collecting and processing data for diagnosing the condition of an arteriovenous fistula. In the fistula, due to increased blood flow, characteristic noises and vibrations of the vessel walls occur. Using the data acquisition device, the acoustic noise of the arteriovenous fistula is recorded. The system processes and analyzes the measured data, evaluates the main indicators of the fistula condition. Changing the main indicators allows you to evaluate the dynamics of changes in the fistula condition. The developed system can be used for remote, long-term and continuous diagnostics of blood vessels in patients on hemodialysis.

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Efficient processing power reservation approach to imporove real-time task schedulability and relaibaility

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International Journal of computer Science Issues 2012年第5 5-2期9卷 196-205页

作者： Youssef, Ahmed E. Hamdy, Abeer Ammar, Reda Faculty of Engineering-Helwan Helwan University Cairo Egypt Department of Information Systems King Saud University Riyadh 11543 Saudi Arabia Department of Computers and Systems Electronic Research Institute Faculty of informatics and Computer Science British University Egypt Dep. of Computer Science and Engineering University of Connecticut Storrs CT 06269-3155 United States

Efficient utilization of the computational resources is an urgent demand especially if real time constraints should be guaranteed. Moreover, an acceptable level of reliability should be provided due to the critical nature of some real time applications. This paper proposes a new approach for processing power reservations that efficiently utilizes all the available processing power to improve reliability and schedulability of independent real time tasks on a uniprocessor. The basic idea of the proposed approach is to use all of the available processing power in the time interval between the arrivals of two successive tasks or when an existing task departs. The advantages of this mechanism are: 1) it reduces the execution time required for each task and hence increases its reliability. 2) At the arrival of a new task;the processing power requirements for the executing tasks to meet their deadlines are smaller, which gives the new arriving tasks higher chances to be accommodated with the existing ones. 3) Efficient processing power utilization may reduce the power consumption in processors with dynamic voltage scaling. An illustration example and simulation experiments showed that our approach provides a more reliable scheduling scheme with higher acceptance rate compared to the traditional approach based on Rialto operating system. © 2012 International Journal of computer Science Issues.

关键词： Reliability

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End-to-End Real-Time Service Provisioning over a SDN-controllable 60 GHz analog FiWi X-haul for 5G Hot-Spot Networks

End-to-End Real-Time Service Provisioning over a SDN-control...

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Optical Fiber Communication Conference, OFC 2016

作者： Vagionas, C. Maximidis, R. Stratakos, I. Margaris, A. Mesodiakaki, A. Gatzianas, M. Kanta, K. Toumasis, P. Giannoulis, G. Apostolopoulos, D. Papatheofanous, E.A. Lentaris, G. Reisis, D. Soudris, D. Tsagkaris, K. Argyris, N. Syrivelis, D. Bakopoulos, P. Oldenbeuving, R.M. Roeloffzen, C.G.H. van Dijk, P.W.L. Dimogiannis, I. Kontogiannis, A. Avramopoulos, H. Miliou, A. Pleros, N. Kalfas, G. Aristotle University of Thessaloniki Dep. of Informatics Center for Interdisciplinary Research and Innovation 54124 Greece School of Electrical & Computer Engineering National Technical University of Athens Greece Electronics Lab Physics Dpt National and Kapodistrian University of Athens Greece Incelligent PC Athens17121 Greece NVIDIA Ermou 56 Athens10563 Greece LIONIX International B.V. Enschede Netherlands IMEC Netherlands P.A.O.K. F.C. Thessaloniki Greece

The first successful demonstration of real-time Ethernet trial services over an analog 2λ-WDM Fiber-Wireless mmWave X-haul is experimentally reported, controlled through Open Daylight SDN controller for flexibly allo...

ISBN: (纸本)9781943580071

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End-to-End Demonstration of an SDN-reconfigurable, FPGA-based TxRx Interface for Analog-IFoF/mmWave X-haul

End-to-End Demonstration of an SDN-reconfigurable, FPGA-base...

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European Conference on Optical Communication (ECOC)

作者： K. Kanta P. Toumasis G. Giannoulis I. Stratakos G. Lentaris E. A. Papatheofanous I. Mesogiti E. Theodoropoulou A. Margaris D. Syrivelis E. Kyriazi G. Brestas K. Tokas N. Argyris C. Vagionas R. Maximidis P. Bakopoulos A. Mesodiakaki M. Gatzianas G. Kalfas K. Tsagkaris N. Pleros D. Reisis G. Lyberopoulos D. Apostolopoulos D. Soudris H. Avramopoulos School of Electrical & Computer Engineering National Technical University of Athens Greece Department of Physics Electronics Laboratory National and Kapodistrian University of Athens COSMOTE Mobile Telecommunications S.A. Incelligent PC NVIDIA Dep. of Informatics Aristotle University of Thessaloniki

ISBN: (数字)9781957171159

ISBN: (纸本)9781665475570

We present an E2E analog X-haul deployment demonstrator, based on successful integration of an SDN-reconfigurable, FPGA-based A-IFoF TxRx into MNO’s infrastructure, relying on constant traffic monitoring and real-time adaptation of the TxRx capacity, showcasing concurrent services support (AR/VR, IoT,4K video streaming) over A-IFoF/mmWave transport implementation.

关键词： Prototypes Europe Streaming media Throughput Physical layer Transceivers Real-time systems

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Fabrication and Studies of Dielectric Properties of Nanocomposites Materials Based on Polyurethane

SSRN

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SSRN 2023年

作者： Hardoň, Štefaň Kúdelčík, Jozef Baran, Anton Hornak, Jaroslav Trnka, Pavel Tamus, Adam Zoltan Koltunowicz, Tomasz Norbert Kozáková, Alena Dérer, Tomáš Department of Physics Faculty of Electrical Engineering and Information Technology University of Žilina Žilina010 26 Slovakia Dep. of Physics Fac. of Electrical Engineering and Informatics Technical University of Košice Park Komenského 2 Košice042 00 Slovakia Dep. of Technologies and Measurement Fac. of Electrical Engineering University of West Bohemia at Pilsen Plzeň301 00 Czech Republic Dep. of Electric Power Engineering Fac. of Electrical Engineering and Informatics Budapest University of Technology of Economics Egry J. Street 18. BudapestH-1111 Hungary Dep. of Electrical Devices and High Voltage Technology Fac. of Electrical Engineering and Computer Science Lublin University of Technology Lublin Poland VUKI a.s. Electroinsulating Resins and Varnishes Bratislava Slovakia

This paper addresses the influence of nanoparticles (NPs) on the dielectric properties of polyurethane. In this research, we only investigated the effect of Al2O3, MgO and ZnO NPs for concentrations up to 2% wt and in the temperature range from 25 to 120 °C. During the preparation of nanocomposites, polymer chains bind to NPs, which then limits their mobility. This effect results in a decrease in real permittivity and the course of polarization mechanisms. We observed an increase in permittivity over the entire temperature range only for a 2% MgO concentration. The decrease in the mobility of polymer chains was confirmed by dynamic-mechanical analysis. This method also results in an increase in the glass transition temperature depending on the type and concentration of NPs. The presence of NPs and the limited mobility of the polymer chains results in a shift of the low-frequency local maximum to lower frequencies © 2023, The Authors. All rights reserved.

关键词： Aluminum oxide

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Is FFT Fast Enough for Beyond 5G Communications? A Throughput-Complexity Analysis for OFDM Signals

arXiv

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arXiv 2020年

作者： Queiroz, Saulo Vilela, Joao P. Monteiro, Edmundo PR Ponta Grossa Brazil CISUC CRACS INESCTEC Dep. of Computer Science Faculty of Sciences University of Porto rua do Campo Alegre s/n Porto4169-007 Portugal CISUC Department of Informatics Engineering University of Coimbra Portugal

In this paper, we study the impact of computational complexity on the throughput limits of the fast Fourier transform (FFT) algorithm for orthogonal frequency division multiplexing (OFDM) waveforms. Based on the spectro-computational complexity (SC) analysis, we verify that the complexity of an N-point FFT grows faster than the number of bits in the OFDM symbol. Thus, we show that FFT nullifies the OFDM throughput on N unless the N-point discrete Fourier transform (DFT) problem verifies as Ω(N), which remains a "fascinating" open question in theoretical computer science. Also, because FFT demands N to be a power of two 2i (i > 0), the spectrum widening leads to an exponential complexity on i, i.e. O(2ii). To overcome these limitations, we consider the alternative frequency-time transform formulation of vector OFDM (V-OFDM), in which an N-point FFT is replaced by N/L (L>0) smaller L-point FFTs to mitigate the cyclic prefix overhead of OFDM. Building on that, we replace FFT by the straightforward DFT algorithm to release the V-OFDM parameters from growing as powers of two and to benefit from flexible numerology (e.g., L = 3, N = 156). Besides, by setting L to Θ(1), the resulting solution can run linearly on N (rather than exponentially on i) while sustaining a non null throughput as N grows. © 2020, CC BY.

关键词： Orthogonal frequency division multiplexing

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ADMM-DAD NET: A DEEP UNFOLDING NETWORK FOR ANALYSIS COMPRESSED SENSING

arXiv

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arXiv 2021年

作者： Kouni, Vasiliki Paraskevopoulos, Georgios Rauhut, Holger Alexandropoulos, George C. Kouni, Vicky Dep. of Informatics and Telecommunications National & Kapodistrian University of Athens Greece Mathematics of Information Processing RWTH Aachen University Germany School of Electrical & Computer Engineering National Technical University of Athens Greece Institute for Language & Speech Processing Athena Research Center Athens Greece

In this paper, we propose a new deep unfolding neural network based on the ADMM algorithm for analysis Compressed Sensing. The proposed network jointly learns a redundant analysis operator for sparsification and reconstructs the signal of interest. We compare our proposed network with a state-of-the-art unfolded ISTA decoder, that also learns an orthogonal sparsifier. Moreover, we consider not only image, but also speech datasets as test examples. Computational experiments demonstrate that our proposed network outperforms the state-of-the-art deep unfolding network, consistently for both real-world image and speech datasets. © 2021, CC BY.

关键词： Compressed sensing

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