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Intelligent Sensors, Sensor Networks and Information Processing Conference (ISSNIP)

作者： Shanika Karunasekera Alex Skvortsov Ajith Gunatilaka Department of Computer Science and Software Engineering University of Melbourne VIC Australia HPP Division Defence Science and Technology Organisation VIC Australia

Minimizing the sensing activity during the pre-attack phase while meeting the performance requirements is critical for reducing the operational costs of chemical sensor networks. In this paper, we present a formal problem formulation for this optimization problem, and propose a decentralized, dynamic sensor activation protocol for meeting this goal. We analyze the behavior of the activation protocol using an epidemiology-based approach and derive analytical expressions for the system performance metrics, namely, operational cost, detection delay, probability of false alarms and probability of detection. We analyze the interdependency between the performance metrics.

关键词： Protocols Chemicals Mathematical model Analytical models Chemical sensors Delay Sensors

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The effect of correlation of chemical tracers on chemical sensor network performance

The effect of correlation of chemical tracers on chemical se...

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Intelligent Sensors, Sensor Networks and Information Processing Conference (ISSNIP)

作者： Champake Mendis Ajith Gunatilaka Alex Skvortsov Shanika Karunasekera HPP Division Defence Science and Technology Organisation VIC Australia Department of Computer Science and Software Engineering University of Melbourne VIC Australia

Chemical sensor networks are used to detect the presence of hazardous chemicals released intentionally or accidentally into the atmosphere. Although many performance attributes of chemical sensor networks, such as energy utilization, detection delay, and false alarm characteristics, have been studied in the literature, the effect of spatial correlation of sensor readings on the network performance has not hitherto been studied. Because chemical tracers dispersing in the turbulent atmosphere are inherently spatially correlated, understanding how such correlations impact on the network performance is vital for chemical sensor network optimization. In this paper we investigate the impact of spatial correlation on the performance of chemical sensor networks.

关键词： Chemicals Correlation Chemical sensors Protocols Object oriented modeling Analytical models Biological system modeling

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Achieving critical infrastructure protection through the interaction of computer security and network forensics

Achieving critical infrastructure protection through the int...

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Annual Conference on Privacy, Security and Trust, PST

作者： Ray Hunt Jill Slay Department of Computer Science & Software Engineering University of Canterbury Christchurch New Zealand Division IT Engineering and the Environment University of South Australia Australia

Recent years have seen substantial development in computer and network security design. This has been manifested as an every increasing range of new protocols, new encryption algorithms, new methods of authentication, smarter firewalls and intrusion detection techniques, new anti-malware products and many more. During the same period of time increasing demands for more trustworthy network infrastructure have seen the development of sophisticated analysis tools necessary to meet the operational requirements of law enforcement agencies. These include tools for e-discovery, commercial intelligence and national security. Thus the industry has seen equally significant developments in computer forensic tools where methods of searching for and detection of, malicious activity for presentation as evidence and provision of trust have become ever more sophisticated. To a considerable degree the science of security and forensics have seen both rapid but separate developments. This paper proposes that there are areas in common between these two important fields of endeavour and sets out techniques and ideas which demonstrate how they can overlap and work together in order to provide improved security and trustworthiness in critical infrastructures. In particular this paper addresses computer security and forensic analysis from a real-time perspective such that security events can be monitored in a live network while sound forensic data collection, storage and processing can be carried out in a manner which supports real-time security and at the same time still meeting the requirements of sound evidence.

关键词： Forensics Security Real time systems Fires computer architecture computers Monitoring

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Coordination-based model-driven method for parallel application development

Coordination-based model-driven method for parallel applicat...

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Workshops and Symposia on Models in software engineering, MODELS 2009

作者： Gudenkauf, Stefan OFFIS Institute for Information Technology R and D-Division Energy Escherweg 2 26121 Oldenburg Germany Software Engineering Group Department of Computer Science Christian-Albrechts-Universität zu Kiel Christian-Albrechts-Platz 4 24118 Kiel Germany

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Customization of Scrum Methodology for Outsourced E-Commerce Projects

Customization of Scrum Methodology for Outsourced E-Commerce...

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Asia-Pacific Conference on software engineering

作者： Nayoung Hong Junbeom Yoo Sungdeok Cha Department of Software Engineering Korea University Seoul South Korea Division of Computer Science and Engineering Konkuk University Seoul South Korea Department of Computer Science and Engineering Korea University Seoul South Korea

This paper describes how scrum method was customized for outsourced e-commerce software projects. While the waterfall process was used in the past, outsourced projects experienced more delays and failures than the ones conducted in-house. To overcome such limitations, we decided to tailor the scrum method on three aspects: First, we produced a table that explains roles and responsibilities of project team members for every phase of the Scrum methodology. Second, we divided sprint planning into two phases, a master sprint plan and individual sprint plans. Finally, we monitored project progress based on the number of completed web pages. Application of the modified scrum method on two projects not only improved product quality but also reduced time necessary to complete the project. More than 80% of the software engineers also expressed satisfaction of the proposed approach.

关键词： Planning Web pages Estimation Companies Monitoring Lead software

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Friend-based secure routing through challenges in mobile ad hoc networks

Friend-based secure routing through challenges in mobile ad ...

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作者： Dhurandher, Sanjay K. Obaidat, Mohammad S. Verma, Karan Gupta, Pushkar Dhurandher, Pravina Division of Information Technology Netaji Subhas Institute of Technology University of Delhi New Delhi India Department of Computer Science and Software Engineering Monmouth University NJ United States Karnataka State Open University Mysore Karnataka India

ISBN: (纸本)9781565553415

This paper proposes a Friend-based security scheme for efficient routing in mobile networks. The idea behind this technique is the establishment of friend networks in the same way as the formation of friends in real life scenarios. The algorithm provides authentication of nodes by sending challenges and creating friend lists of nodes that complete the challenge. Friends are rated on the basis of the amount of data they transfer through themselves and according to the rating of other friends, which is obtained during the friend list sharing process. The data is finally routed through the route with the greatest number of trusted friends. One of the greatest advantages of this technique is that the nodes do not need to work in the promiscuous mode. The information about the malicious nodes is gathered effectively by using challenges. This reduces the overhead on the network significantly. Through various simulation experiments it has been found that the proposed algorithm works very efficiently in terms of detecting the malicious nodes and also allowing lesser number of packets to be routed through these detected malicious nodes.

关键词： Mobile ad hoc networks

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A Decentralized Dynamic Sensor Activation Protocol for Chemical Sensor Networks

A Decentralized Dynamic Sensor Activation Protocol for Chemi...

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IEEE International Symposium on Network Computing and Applications

作者： Shanika Karunasekera Champake Mendis Alex Skvortsov Ajith Gunatilaka Department of Computer Science and Software Engineering University of Melbourne VIC Australia Human Protection and Performance Division Defence Science and Technology Organisation VIC Australia

Due to the significant amount of energy consumed by chemical sensors for sensing, reducing sensing activity is critical for improving the lifespan of chemical sensor networks. In this paper, we consider a simple decentralized dynamic sensor activation protocol that aims to maintain a majority of sensors in the inactive (passive) state in the absence of a chemical attack, and rapidly activate the sensors when an attack is detected. This paper proposes two analytical models to study the behavior of the sensor network under the proposed protocol. Our first analytical model employs the known analogy between the information spread in a sensor network and the propagation of epidemics across a population. The second model describes the protocol by using a framework of graph theory.

关键词： Protocols Analytical models Mathematical model Chemicals Chemical sensors Sensors Equations

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Interpretative adjoints for numerical simulation codes using MPI

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Procedia computer science 2010年第1期1卷 1825-1833页

作者： Michel Schanen Uwe Naumann Laurent Hascoët Jean Utke LuFG Informatik 12: Software and Tools for Computational Engineering RWTH Aachen University Projet TROPICS INRIA Sophia-Antipolis Mathematics and Computer Science Division Argonne National Laboratory Argonne

An essential performance and correctness factor in numerical simulation and optimization is access to exact derivative information. Adjoint derivative models are particularly useful if a function’s number of inputs far exceeds the number of outputs. The propagation of adjoints requires the data flow to be reversed, implying the reversal of all communication in programs that use message-passing. This paper presents recent advances made in developing the adjoint MPI library AMPI. The described proof of concept aims to serve as the basis for coupling other overloading AD tools with AMPI. We illustrate its use in the context of a specific overloading tool for algorithmic differentiation (AD) for C++ programs. A simplified but representative application problem is discussed as a case study.

关键词： Adjoint MPI Automatic differentiation Source transformation

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Hardware/software co-design for high performance computing: Challenges and opportunities 10

Hardware/software co-design for high performance computing: ...

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Proceedings of the eighth IEEE/ACM/IFIP international conference on Hardware/software codesign and system synthesis

作者： Hu, X. Sharon Murphy, Richard C. Dosanjh, Sudip Olukotun, Kunle Poole, Stephen Department of Computer Science and Engineering University of Notre Dame Notre Dame IN United States Scalable Computer Architecture Department Sandia National Laboratories Albuquerque NM United States Computer and Software Systems Department Sandia National Laboratories Albuquerque NM United States Department of Electrical Engineering Stanford University Stanford CA United States Computational Sciences Division Oak Ridge National Lab Oak Ridge TN United States

ISBN: (纸本)9781605589053

This special session aims to introduce to the hardware/software codesign community challenges and opportunities in designing high performance computing (HPC) systems. Though embedded system design and HPC system design have traditionally been considered as two separate areas of research, they in fact share quite some common features, especially as CMOS devices continue along their scaling trends and the HPC community hits hard power and energy limits. Understanding the similarities and differences between the design practices adopted in the two areas will help bridge the two communities and lead to design tool developments benefiting both communities.

关键词： Hardware-software codesign

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Energy efficient routing for wireless sensor networks in urban environments

Energy efficient routing for wireless sensor networks in urb...

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IEEE Globecom Workshops

作者： Sanjay K. Dhurandher Mohammad S. Obaidat Deepank Gupta Nidhi Gupta Anupriya Asthana CAITFS Division of Information Technology University of Delhi New Delhi India Department of Computer Science & Software Engineering Monmouth University NJ USA

The interconnection of mobile devices in urban environments such as shopping malls can open up a lot of vistas for collaboration and content-based services. This will require setting up of a network in an urban environment which not only provides the necessary services to the user, but also ensures that the network is energy efficient. In this paper, we propose an energy efficient dynamic routing protocol for heterogeneous wireless sensor networks in urban environments. A decision is made by every node based on various parameters like longevity, distance and battery power that measure the link quality to decide the next hop node in the route. This ensures that the total load is distributed evenly while conserving the energy of the battery-constrained nodes and minimizing the number of dead nodes in the network and improving the network lifetime. The paper discusses the results obtained for the proposed protocol in comparison with an energy efficient protocol MMBCR and a widely accepted protocol DSR. The performance of the proposed protocol was analyzed using simulation analysis and observed to be better than these of both competing protocols.

关键词： Routing Routing protocols Energy efficiency Batteries Urban areas Mobile handsets

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