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2013 IEEE 9th World Congress on Services, SERVICES 2013

作者： Mershad, Khaleel Kaitoua, Abdul Rahman Artail, Hassan Saghir, Mazen A.R. Hajj, Hazem Electrical and Computer Engineering Department American University of Beirut Beirut Lebanon Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9780768550244

Cloud computing is increasingly becoming a desirable and foundational element in international enterprise computing. There are many companies which design, develop, and offer cloud technologies. However, cloud providers are still like lone islands. While current cloud computing models have provided significant benefits of maximizing the use of resources within a cloud, the current solutions still face many challenges including the lack of cross-leverage of available resources across clouds, the need to move data between clouds in some cases, and the lack of a global efficient cooperation between clouds. In [1], we addressed some of these challenges by providing an approach that enables various cloud providers to cooperate in order to execute, together, common requests. In this paper, we illustrate several enhancements to our work in [1] which focus on integrating hardware acceleration with the cloud services. We extend the Hadoop framework by adding provisions for hardware acceleration with Field programmable Gate Arrays (FPGAs) within the cloud, for multi-cloud interaction, and for global cloud management. Hardware acceleration is used to offload computations when needed or as a service within the clouds. It can provide additional sources of revenues, reduced operating costs, and increased resource utilization. We derive a mathematical model for evaluating the performance of the most important entity in our system under various conditions. © 2013 IEEE.

关键词： Cloud computing

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General order antenna selection in dual-hop amplify forward system with multi-antenna relay

General order antenna selection in dual-hop amplify forward ...

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2010 International Conference on Advanced Technologies for Communications, ATC 2010

作者： Gurung, Arun K. Ai-Qahtani, Fawaz S. Hussain, Zahir M. Alnuweiri, Hussein School of Electrical and Computer Engineering RMIT University Melbourne VIC Australia Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781424488766

In this paper, we apply General Order Statistics (GOS) theorem for the antenna selection in dual-hop amplify-forward fixed-gain relay transmission. The antenna selection is employed at multi-antenna relay terminal for both receiving and transmission. The closed-form expressions of SNR (Signal-to-Noise-Ratio) statistics such as CDF (Cumulative Distribution Function), PDF (Probability Density Function), MGF (Moment Generating Function) and Generalized Moments were derived. The statistics were then used for performance analysis in terms of outage probability and error rate. The expressions are new and specialize to earlier results. The analysis is confirmed with computer simulation. The results facilitate to quantify the performance loss when lower order antenna is selected for the relay links. ©2010 IEEE.

关键词： Probability density function

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Robust Graph Autoencoder-Based Detection of False Data Injection Attacks Against Data Poisoning in Smart Grids

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2024年第3期5卷 1287-1301页

作者： Takiddin, Abdulrahman Ismail, Muhammad Atat, Rachad Davis, Katherine R. Serpedin, Erchin Department of Electrical and Computer Engineering Texas A and M University College StationTX77843 United States Department of Computer Science Tennessee Tech University CookevilleTN38505 United States Department of Electrical and Computer Engineering Program Texas A and M University Qatar Doha23874 Qatar

Machine learning-based detection of false data injection attacks (FDIAs) in smart grids relies on labeled measurement data for training and testing. The majority of existing detectors are developed assuming that the adopted datasets for training have correct labeling information. However, such an assumption is not always valid as training data might include measurement samples that are incorrectly labeled as benign, namely, adversarial data poisoning samples, which have not been detected before. Neglecting such an aspect makes detectors susceptible to data poisoning. Our investigations revealed that detection rates (DRs) of existing detectors significantly deteriorate by up to 9-29% when subject to data poisoning in generalized and topology-specific settings. Thus, we propose a generalized graph neural network-based anomaly detector that is robust against FDIAs and data poisoning. It requires only benign datasets for training and employs an autoencoder with Chebyshev graph convolutional recurrent layers with attention mechanism to capture the spatial and temporal correlations within measurement data. The proposed convolutional recurrent graph autoencoder model is trained and tested on various topologies (from 14, 39, and 118-bus systems). Due to such factors, it yields stable generalized detection performance that is degraded by only 1.6-3.7% in DR against high levels of data poisoning and unseen FDIAs in unobserved topologies. Impact Statement-Artificial Intelligence (AI) systems are used in smart grids to detect cyberattacks. They can automatically detect malicious actions carried out bymalicious entities that falsifymeasurement data within power grids. Themajority of such systems are data-driven and rely on labeled data for model training and testing. However, datasets are not always correctly labeled since malicious entities might be carrying out cyberattacks without being detected, which leads to training on mislabeled datasets. Such actions might degrade the d

关键词： Cybersecurity

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A mediation layer for connecting data-intensive applications to reconfigurable data nodes

A mediation layer for connecting data-intensive applications...

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2013 IEEE 2013 22nd International Conference on computer Communication and Networks, ICCCN 2013

作者： Jomaa, Mohamad Mershad, Khaleel Abbani, Noor Sharaf-Dabbagh, Yaman Romanous, Bashar Artail, Hassan Saghir, Mazen A. R. Hajj, Hazem Akkary, Haitham Awad, Mariette Department of Electrical and Computer Engineering American University of Beirut Beirut Lebanon Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781467357746

A novel and rapidly growing area of research concerns data-intensive applications and the technical challenges that accompany it. One of those challenges is developing approaches and mechanisms that render high performance in processing and storing data. We joined this research effort by proposing a reconfigurable active solid state drives (RASSD) system that deals with such applications, through employing basic hardware, namely FPGA's connected to SSD's, to service the above applications as processing nodes, and take advantage of the close proximity between storage and processing. In this paper, we propose an intelligent middleware system for interfacing workstation-based and mobile applications to the distributed RASSD system. In order to provide high performance in terms of time and functionality, the middleware manages the data processing on the RASSD nodes through special pieces of code that we call drivelets, along with FPGA configuration files (bitstreams). Another important responsibility of the proposed middleware architecture lies in the unguided management of applications' flows, where it uses an intelligent script-parsing mechanism to turn one general request from the client into a sequence of operations needed to generate the required results. The middleware design allows for the integration of mobile applications into the overall architecture of the RASSD system, and allowing them to run data intensive applications that otherwise it is unfeasible for them to execute. We validate our design by comparing it to an existing middleware architecture, and present two use-cases with their results and discussion. © 2013 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Performance analysis of amplify-forward relay in mixed Nakagami-m and Rician fading channels

Performance analysis of amplify-forward relay in mixed Nakag...

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2010 International Conference on Advanced Technologies for Communications, ATC 2010

作者： Gurung, Arun K. Ai-Qahtani, Fawaz S Hussain, Zahir M. Alnuweiri, Hussein School of Electrical and Computer Engineering RMIT University Melbourne VIC Australia Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781424488766

The performance of a dual-hop amplify-and forward relay system is analyzed in terms of outage probability and average symbol error rate. The source-relay and relay-destination channels experience mixed fading distributions namely, Rician and Nakagami-m. Analytical expressions for Cumulative Distribution Function (CDF) and Probability Density Function (PDF) of end-end signal-to-noise-ratio (SNR) are derived and confirmed with Monte-Carlo simulation. Approximate lower bound for outage probability is also derived, which becomes tight at high SNR values. The expressions are given in terms of infinite sum series of modified Bessel function, which converges after finite iterations. The derived expressions are valid for different fading scenarios (depending on m factor), and specialize to previously published results for m = 1. ©2010 IEEE.

关键词： Probability density function

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A distributed reconfigurable active SSD platform for data intensive applications

A distributed reconfigurable active SSD platform for data in...

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13th IEEE International Workshop on FTDCS 2011, the 8th International Conference on ATC 2011, the 8th International Conference on UIC 2011 and the 13th IEEE International Conference on HPCC 2011

作者： Abbani, Noor Ali, Ali Otoom, Doa'A Al Jomaa, Mohamad Sharafeddine, Mageda Artail, Hassan Akkary, Haitham Saghir, Mazen A.R. Awad, Mariette Hajj, Hazem Department of Electrical and Computer Engineering American University of Beirut Beirut Lebanon Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9780769545387

In this paper, we propose to combine active solid state drives and reconfigurable FPGAs into a storage-compute node to use as a building block in a distributed, high performance computation platform for data intensive applications. We propose a complete framework for middleware functionality through an API abstraction layer that hides the complexity of accessing and processing data stored on these distributed nodes, thus allowing programmers to focus on the application, and not the underlying specialized architecture. The application in turn is re-architected to maximize its performance by delegating selected computations down to the storage-compute node. We present preliminary results measured on a real hardware prototype of a single-node. These results show that our proposed architecture provides more than a 2x improvement in performance over non-reconfigurable active-disk architectures that use electromechanical disks for storage and a 6x improvement in performance over a platform that performs the computation on the middle server. © 2011 IEEE.

关键词： Middleware

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A Multi-trace Surface Integral Equation Solver to Analyze Electromagnetic Field Interactions on Graphene-based Devices

A Multi-trace Surface Integral Equation Solver to Analyze El...

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2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022

作者： Zhao, Ran Chen, Liang Hu, Jun Bagci, Hakan Electrical and Computer Engineering Program Computer Electrical and Mathematical Science and Engineering Division Thuwal23955 Saudi Arabia School of Electronic Science and Engineering Chengdu610056 China

ISBN: (数字)9781665496582

ISBN: (纸本)9781665496582

A multi-trace surface integral equation (MT-SIE) solver is proposed to analyze electromagnetic field interactions on graphene-based devices. This solver decomposes the computation domain into an exterior subdomain (the background medium where the device resides in) and an interior subdomain that represents the device's dielectric substrate. The infinitesimally thin graphene sheet partially covers the interface between these two subdomains. On the graphene surface and the rest of this interface, resistive Robin transmission conditions (formulated for the first time in this work) and the traditional Robin transmission conditions are used to "connect"these two subdomains, respectively. In each subdomain, the electric and magnetic field equations are used as the governing equations. Various numerical examples are presented to demonstrate the accuracy and the applicability of the proposed MT-SIE solver. © 2022 IEEE.

关键词： Graphene

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Robotics: Its effectiveness as a tool to teach engineering design and computer programming

Robotics: Its effectiveness as a tool to teach engineering d...

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2011 IEEE Global engineering Education Conference, EDUCON 2011

作者： Ahmed, Beena Alsaleh, Karawan Electrical and Computer Engineering Program Texas AandM University at Qatar Doha Qatar

ISBN: (纸本)9781612846439

In this paper we will discuss the experience of using simple robotics projects to introduce first year students to engineering. The key learning objectives and tools used to implement them and the evaluation results will be detailed. Evaluation results show that robotics projects are effective in engaging the students and an effective active learning tool. © 2011 IEEE.

关键词： Robot programming

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Lateral organic photodetectors for imaging applications

Lateral organic photodetectors for imaging applications

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Medical Imaging 2011: Physics of Medical Imaging

作者： Shafique, Umar Karim, Karim S. Nano-Technology Program Electrical and Computer Engineering Department University of Waterloo Canada

ISBN: (纸本)9780819485038

Organic semiconductor detectors have always been in active research interest of researchers due to its low fabrication cost. Vertical organic detectors have been studied in the past but not much of the works have been done on lateral organic detectors. The lateral design has an advantage over the vertical design that it is easy to fabricate and can be easily integrated with the backplane TFT imager circuit. Integrating an organic photodetectors with TFT imager can improve the over all sensitivity of the imager. However the lateral design limits the fill-factor. Here in our work we propose a new bilayered lateral organic photodetectors with Copper-Phthalocyanine (CUPC) as top and Perylene- Tetracarboxylic Bis- Benzimidazole (PTCBI) as the bottom layer organic material. The bottom organic semiconductor layer work as both, charge transport layer and photon absorption layer. The top and bottom layer provides and heterojunction a potential gradient enough to separate the photo generated excitons in to electrons and holes. The incident photons are absorbed in the two layers active layers giving an exciton. These excitons see a potential barrier at the CUPC-PTCBI heterojunction and separated into holes and electrons. The separated electrons are directed by the external applied electric field and thus give a increase in photocurrent. Lateral organic photodetectors are simple to design and have low dark current. The photo-response of these photo detectors is observed approximately three orders higher in magnitude compare able to its dark response. The dual layer has an advantage of tuning the devices for different absorption wavelengths and were observed more stable comparable to vertical devices. © 2011 SPIE.

关键词： Photodetectors

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The Design and Development of a Low SWaP Communications System for a IP Cube Satellite

The Design and Development of a Low SWaP Communications Syst...

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2024 IEEE MIT Undergraduate Research Technology Conference, URTC 2024

作者： Harounian, Joseph Blanchard, Patrick Marnell, Trout Basnet, Saurav Wentworth Institute of Technology Program of Electrical and Computer Engineering Boston United States

ISBN: (纸本)9798331531003

The increased use of small satellites in commercial, defense, and research industries reinforces the need for efficient and reliable communication subsystems. Compact, space rated, communication subsystems present their own unique design challenges. This paper presents the design and implementation of a lower power, low form factor communication subsystem for a IP pico-satellite, developed by a team of undergraduate students from Wentworth Institute of Technology. This effort aims to contribute to the growing field of small satellite communications by providing a robust and efficient solution. © 2024 IEEE.

关键词： Small satellites

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