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12th IEEE SENSORS 2013 Conference

作者： Babjak, Benjamin Szilvasi, Sandor Volgyesi, Peter Yapar, Ozgur Basu, Prodyot K. Institute for Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN United States Department of Civil and Environmental Engineering Vanderbilt University Nashville TN United States

ISBN: (纸本)9781467346405

In this paper we describe our custom designed, low-power, intelligent sensor platform, and a novel analysis approach for Structural Health Monitoring (SHM). More specifically we show how Acoustic Emission (AE) signals were recorded during aluminium and steel beam break tests utilizing two channels on our MarmotE platform, and how subsequent low-resource but accurate onset time detection yielded Time Difference of Arrival (TDoA) results. We also demonstrate a new, simplified method to pick valid AE events from a vast set of noisy measurements, and prove the feasibility of our ideas by showing that our approach provided results comparable to widely used industry methods with modest resource requirements. © 2013 IEEE.

关键词： Time difference of arrival

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Guided skill practice as an adaptive scaffolding strategy in open-ended learning environments 1

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16th International Conference on Artificial Intelligence in Education, AIED 2013

作者： Segedy, James R. Biswas, Gautam Feitl Blackstock, Emily Jenkins, Akailah Institute of Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University 1025 16th Avenue South NashvilleTN 37212 United States

ISBN: (数字)9783642391125

ISBN: (纸本)9783642391118

While open-ended learning environments (OELEs) offer powerful learning opportunities, many students struggle to learn in them. Without proper support, these learners use system tools incorrectly and adopt suboptimal learning strategies. Typically, OELEs support students by providing hints: suggestions for how to proceed combined with information relevant to the learner's situation. However, students often ignore or fail to understand such hints. To address this problem, we present an alternative approach to supporting students in OELEs that combines suggestions and assertions with guided skill practice. We demonstrate the feasibility of our approach through an experimental study that compares students who receive suggestions, assertions, and guided skill practice to students who receive no such support. Findings indicate that learners who received the scaffolds approached their tasks more systematically. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Students

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Adaptive scaffolds in open-ended learning environments

Adaptive scaffolds in open-ended learning environments

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16th International Conference on Artificial Intelligence in Education, AIED 2013

作者： Segedy, James R. Institute of Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University 1025 16th Avenue South NashvilleTN 37212 United States

ISBN: (纸本)9783642391118

Open-ended learning environments (OELEs) are learner-centered, and they offer students opportunities to take part in authentic and complex problem-solving tasks. However, learners typically struggle to learn with OELEs without proper adaptive scaffolds. This paper describes research and development related to designing real-time algorithms for diagnosing students' needs in OELEs and responding with appropriate adaptive scaffolds. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Problem solving

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Suggest-assert-modify: A taxonomy of adaptive scaffolds in computer-based learning environments 16

Suggest-assert-modify: A taxonomy of adaptive scaffolds in c...

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Workshops at the 16th International Conference on Artificial Intelligence in Education, AIED 2013

作者： Segedy, James R. Loretz, Kirk M. Biswas, Gautam Institute of Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University 1025 16th Avenue South NashvilleTN37212 United States

Adaptive scaffolding in computer-based learning environments (CBLEs) continues to be an active area of research, with researchers framing the problem as determining the what, when, how, and by whom or what of adap- tive scaffolding strategies. This paper presents our recent work in developing a taxonomy for adaptive scaffolds in CBLEs. The taxonomy, motivated by previ- ous work in developing adaptive scaffolds, attempts to address the how of scaf- folding by describing the tools and techniques available for scaffolding in CBLEs. We present the taxonomy, which describes adaptive scaffolds as one or more suggestions, assertions, and learning task modifications, and we discuss the utility of the taxonomy in describing adaptive scaffolding strategies.

关键词： Taxonomies

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Co-Simulation Framework for Design of Time-Triggered Cyber Physical systems

Co-Simulation Framework for Design of Time-Triggered Cyber P...

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IEEE/ACM International Conference on Cyber-Physical systems

作者： Zhenkai Zhang Joseph Porter Emeka Eyisi Gabor Karsai Xenofon Koutsoukos Janos Sztipanovits Institute for Software Integrated Systems (ISIS) Department of Electrical Engineering and Computer Science Vanderbilt University

ISBN: (纸本)9781450319966

Designing cyber-physical systems (CPS) is challenging due to the tight interactions between software, network/platform, and physical components. A co-simulation method is valuable to enable early system evaluation. In this paper, a co-simulation framework that considers interacting CPS components for design of time-triggered (TT) CPS is proposed. Virtual prototyping of CPS is the core of the proposed framework. A network/platform model in SystemC forms the backbone of the virtual prototyping, which bridges control software and physical environment. The network/platform model consists of processing elements abstracted by realtime operating systems, communication systems, sensors, and actuators. The framework is also integrated with a model-based design tool to enable rapid prototyping. The framework is validated by comparing simulation results with the results from a hardware-in-the-loop automotive simulator.

关键词： Design Performance Co-simulation Virtual prototyping CPS SystemC Virtual prototyping Frameworks system evaluation design tools

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Advanced mobility handover for mobile IPV6 based wireless networks

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Scientific World Journal 2014年第1期2014卷 602808-602808页

作者： Safa Sadiq, Ali Fisal, Norsheila Binti Ghafoor, Kayhan Zrar Lloret, Jaime Faculty of Computer Systems and Software Engineering Universiti Malaysia Pahang Lebuhraya Tun Razak Gambang Kuantan Pahang 26300 Malaysia UTM MIMOS CoE in Telecommunication Technology Faculty of Electrical Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor 81310 Malaysia Faculty of Engineering University of Koya Daniel Miterrand Boulevard Kurdistan Koya KOY45 Iraq Instituto de Investigacion Para la Gestion Integrada de Zonas Costeras Universidad Politecnica de Valencia Valencia 46022 Spain

We propose an Advanced Mobility Handover scheme (AMH) in this paper for seamless mobility in MIPv6-based wireless networks. In the proposed scheme, the mobile node utilizes a unique home IPv6 address developed to maintain communication with other corresponding nodes without a care-of-address during the roaming process. The IPv6 address for each MN during the first round of AMH process is uniquely identified by HA using the developed MN-ID field as a global permanent, which is identifying uniquely the IPv6 address of MN. Moreover, a temporary MN-ID is generated by access point each time an MN is associated with a particular AP and temporarily saved in a developed table inside the AP. When employing the AMH scheme, the handover process in the network layer is performed prior to its default time. That is, the mobility handover process in the network layer is tackled by a trigger developed AMH message to the next access point. Thus, a mobile node keeps communicating with the current access point while the network layer handover is executed by the next access point. The mathematical analyses and simulation results show that the proposed scheme performs better as compared with the existing approaches. © 2014 Ali Safa Sadiq et al.

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Towards a systems of systems engineering EU strategic research agenda

Towards a systems of systems engineering EU strategic resear...

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2013 8th International Conference on System of systems engineering: SoSE in Cloud Computing and Emerging Information Technology Applications, SoSE 2013

作者： Henson, S.A. Henshaw, M.J.D. Barot, V. Siemieniuch, C.E. Sinclair, M.A. Jamshidi, M. Dogan, H. Lim, S.L. Ncube, C. DeLaurentis, D. SESEE ESoS Group Loughborough University Loughborough United Kingdom Department of Electrical and Computer Engineering San Antonio TX United States Software Systems Research Centre Bournemouth University United Kingdom Center for Integrated Systems in Aerospace Purdue University West Lafayette IN United States

ISBN: (纸本)9781467355971

This paper presents the work undertaken so far in the formulation of a Strategic Research Agenda (SRA) for research in systems of systems engineering in the EU. The T-AREA-SoS project is introduced to provide a context, together with a section on Drivers for Change which the SRA needs to take into account. The strategy and process for the generation of the SRA is described, followed by details of outputs to date and the potential benefits it is believed would accrue from the implementation of the SRA. © 2013 IEEE.

关键词： System of systems

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Poster: Revisiting anomaly detection system design philosophy 13

Poster: Revisiting anomaly detection system design philosoph...

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2013 ACM SIGSAC Conference on computer and Communications Security, CCS 2013

作者： Ashfaq, Ayesha Binte Ali, Muhammad Qasim Al-Shaer, Ehab Khayam, Syed Ali School of Electrical Engineering and Computer Science National University of Sciences and Technology Islamabad Pakistan Department of Software and Information Systems University of North Carolina Charlotte Charlotte NC United States PLUMgrid Inc. Sunnyvale CA United States

ISBN: (纸本)9781450324779

The inherent design of anomaly detection systems (ADSs) make them highly susceptible to evasion attacks and hence their wide-spread commercial deployment has not been witnessed. There are two main reasons for this: 1) ADSs incur high false positives;2) Are highly susceptible to evasion attacks (false negatives). While efforts have been made to minimize false positives, evasion is still an open problem. We argue that ADSs design is inherently flawed since it relies on the ADS's detection logic and feature space which is trivial to estimate. In information security e.g. cryptographic algorithms (such as DES), security is inherently dependent upon the key and not the algorithm, which makes these systems very robust by rendering evasion computationally infeasible. We believe there is a need to redesign the anomaly detection systems similar to cryptographic systems. We propose to randomize the feature space of an ADS such that it acts as a cryptographic key for the ADS and hence this randomized feature space is used by the ADS logic for detection of anomalies. This would make the evasion of the ADS computationally infeasible for the attacker. © 2013 Authors.

关键词： Feature extraction

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Indoor localization using ultrasonic time difference of arrival

Indoor localization using ultrasonic time difference of arri...

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IEEE Southeastcon

作者： Shuo Pang Ricardo Trujillo Department of Electrical Computer Software and Systems Engineering Embry-Riddle Aeronautical University Daytona Beach FL USA

ISBN: (纸本)9781479900527

Indoor environments like those found in mining and firefighting operations are extremely dynamic and Immediately Dangerous to Life and Health (IDLH), requiring Incident Commanders and supervisors to constantly be aware of the location of their personnel. This paper presents a graduate student project to develop, in the span of one semester, a prototype for indoor localization using readily-available ultrasonic sensors and Time Difference of Arrival (TDOA) techniques to showcase the feasibility and accuracy of such a system. TDOA employs measurements of difference in time between signals arriving at receiver nodes, with the absolute position of the nodes being known. A time difference of arrival between two receiver nodes defines a hyperbola on which the transmitter must be located, and three or more TDOA measurements provide a location fix where the hyperbolas intersect. A system was implemented using one transmitter circuit with six ultrasonic transducers spaced in such a manner as to create omnidirectional coverage, and four receiver circuits converting the presence of an ultrasonic broadcast to a high output. The four receiver outputs were then fed into a microcontroller that time-stamped the signal and solved the issue of needing a common clock. The resulting data, even when using simplified equations, yielded position location accuracy within a foot in both X and Y directions. Some issues were encountered in and around the center lines of the test area. Overall, this prototype proved the feasibility of implementing a simple localization system that provides relatively accurate location results.

关键词： Receivers Acoustics Fires Microcontrollers Radio transmitters Wireless sensor networks

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Altruism as a mechanism for resource management

Altruism as a mechanism for resource management

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IEEE Southeastcon

作者： Michael B. Kouremetis Keith Garfield Department of Electrical Computer Software & Systems Engineering Embry-Riddle Aeronautical University Daytona Beach FL USA

A persistent challenge that is manifested in many environments is how to effectively utilize and share resources among a population or across a system. This paper discusses the concept of altruism as a convention for resource management and utilization. A simple agent based simulation is introduced where agents share finite resources over iterative rounds of interaction. The agents and their ability to maintain sufficient resources were observed at varying levels of resource supply and altruism levels. Agents were left absent of kinship and social behavioral components in order to focus primarily on the effect the altruism component had on population health. It was found that at resource levels above 75% of demand, altruism levels of 60-80% provided for the optimal population health. While below 75%, a completely non-altruistic population achieved greater population health. In addition, the effectiveness of the altruism component is highly dependent on the sharing algorithm employed to manage resources.

关键词： Sociology Statistics Resource management Computational modeling Algorithm design and analysis Biological system modeling Organisms

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