We discuss a novel framework for integrated sensing and resource management in a distributed intelligent sensor network with sensor nodes whose useful active lifetime is significantly shorter than the required lifetim...
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ISBN:
(纸本)9780780387355
We discuss a novel framework for integrated sensing and resource management in a distributed intelligent sensor network with sensor nodes whose useful active lifetime is significantly shorter than the required lifetime of the sensor system. Past sensor network research has focused on security and communication, but largely ignored the overall dynamic resource management issue of such distributedsystems. Our contribution is in integrated control optimization and resource management algorithms to ensure proper functioning of distributedsensors in extremely limited bandwidth, power, and storage. In this paper, we present a novel genetic algorithm for real-time system control and resource management that handles multiple conflicting objectives and constraints in the distributed system. Our framework is suitable for dynamic environments where the desired system performance and resource usage changes dynamically while being constrained by limited amount of resources.
A distributed system for approximate query answering on sensor network data is proposed, where a suitable compression technique is exploited to represent data and support query answering. Each node of the system store...
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ISBN:
(纸本)0769523005
A distributed system for approximate query answering on sensor network data is proposed, where a suitable compression technique is exploited to represent data and support query answering. Each node of the system stores either detailed or summarized sensor readings. Query answers are computed by identifying the set of nodes that contain (either compressed or not) data involved in the query, and eventually partitioning the query in a set of sub-queries to be evaluated at different nodes. Queries are partitioned according to a cost model aiming at making the evaluation efficient and guaranteeing the desired degree of accuracy of query answers.
Physiological monitoring can be useful in a number of scenarios to evaluate or diagnose the status of individuals or groups, for health or mental reasons. The devices used to collect this data have become increasingly...
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ISBN:
(纸本)9781467347211
Physiological monitoring can be useful in a number of scenarios to evaluate or diagnose the status of individuals or groups, for health or mental reasons. The devices used to collect this data have become increasingly portable, but deriving useful metrics from such data can often take significant processing - a commodity not always available in mobile environments. This paper presents and evaluates a system designed to easily process physiological signals in mobile environments by utilising commonly-available smartphone hardware to collaboratively transform collected data.
In some trading-based Web applications, it is desirable for the parties engaged in a business to negotiate via their own agent system. This requires their agent system to be inter-operable through a distributed archit...
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ISBN:
(纸本)9780780387355
In some trading-based Web applications, it is desirable for the parties engaged in a business to negotiate via their own agent system. This requires their agent system to be inter-operable through a distributed architecture. In this paper we present the Collaborative Agreement for Automated Trading (CAAT), an initiative intended to deal with this issue. The framework, built on top of the FIP A Agent Architecture model, combines the agent technology and the Web service functionalities to provide a distributedcomputing architecture for supporting online bargaining. It has three main components: the Business Interaction Model, the Ontology, and the Interaction Protocol.
We propose and study a class of structured and dynamic information push and pull protocols for wireless sensor networks. For structured information dissemination, our study focuses on the impact of various information...
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ISBN:
(纸本)9783540730897
We propose and study a class of structured and dynamic information push and pull protocols for wireless sensor networks. For structured information dissemination, our study focuses on the impact of various information demand characteristics on dissemination along some type of backbone structures. Our exploration of dynamic information push and pull focuses on finding optimal strategies in a distributed manner without prior knowledge of information demand characteristics and/or with heterogeneous query distributions. Our theoretical analysis uses a simple grid structure, but the protocol is applicable to arbitrary network topologies. A distributed traffic information system is used as the context of study and the simulation study uses a microscopic traffic simulator to demonstrate some of the ideas discussed in the paper.
Community detection in complex networks has a wide range of applications such as detection of cyber-communities in social networks, recommendations based on the interest group, and estimating hidden features in a soci...
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ISBN:
(纸本)9781538625880
Community detection in complex networks has a wide range of applications such as detection of cyber-communities in social networks, recommendations based on the interest group, and estimating hidden features in a social network. In distributed frameworks, the primary focus has been scalability. However, the accuracy of the algorithm's output is also critical. We propose the first distributed community detection algorithm based on the state-of-the-art CEIL scoring function. Our algorithm, named DCEIL, is fast, scalable and maintains the quality of communities. DCEIL outperforms the existing state-of-theart distributed Louvain algorithm by 180% on an average in Normalized Mutual Information (NMI) Index and 6.61% on an average in Jaccard Index metrics. DCEIL completes execution for 1 billion edges within 112 minutes and outperforms state-of-the-art distributed Louvain algorithm by 4.3x. DCEIL critically exploits three novel heuristics which address the existing issues with distributed community detection algorithms that have the hierarchical structure of CEIL or Louvain methods. Further, our proposed heuristics are generic as well as efficient, and we illustrate their efficacy by enhancing the accuracy of distributed Louvain algorithm by 22.91% on an average in Jaccard Index, and the average execution time by 1.68 x over popular datasets.
We present a distributedsystems architecture that uses Grid computing to combine basic nodes of wireless sensor networks with complex sensor nodes of wired networks. Three kinds of complex sensor nodes are identified...
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Access control (AC) is critical for preventing sensitive information from unauthorized access. Various AC systems have been proposed and enforced in different types of information systems (e.g., bank and military). Ho...
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ISBN:
(纸本)9781538625651
Access control (AC) is critical for preventing sensitive information from unauthorized access. Various AC systems have been proposed and enforced in different types of information systems (e.g., bank and military). However, existing AC systems cannot thoroughly address the challenges in emerging distributed processing systems (DPS), such as Big Data (BD) and Cloud, due to their dynamic and complex architecture. Generally, AC for DPS needs to consider the protection for collaboration among distributed processing domains. Even though some DPS architectures were proposed to address DPS challenges, most of them only focus on processing capabilities without consideration of AC. Even with some inclusion of security in recent DPS, they are mostly ad hoc and patch efforts. In this paper, we analyze the general features and use cases of BD and Cloud, which are two of most widely applied DPS applications, and propose a set of general and comprehensive considerations for AC in DPS, which can provide a guideline for designing AC systems for DPS.
The application of run-time evolvable software stacks promises an increase in the lifetime of wireless sensor network deployments. Besides supporting changing application requirements, said systems allow the underlyin...
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ISBN:
(纸本)9781467347211
The application of run-time evolvable software stacks promises an increase in the lifetime of wireless sensor network deployments. Besides supporting changing application requirements, said systems allow the underlying platforms to adapt to new environments by replacing system and communication services at runtime. These dynamics across various software layers however complicate the provision of accurate information about the current software and environmental status of a sensor node. This is problematic as sensor network management requires such information to configure efficient systems. As such, a mechanism needs to be in place via which run-time deployable software services can make their status information available to others in a standardized manner. In this paper we introduce StIgMa;a design for a unified node-local status registry on a sensor node. StIgMa's interfaces are cross-cutting and provide access to status information on all software layers on a sensor node. This is achieved without duplication of status data and avoiding tight coupling of status information providers and clients. To allow multi-user and flexible operation, StIgMa is supported by an extensible namespace for status parameters and a query language. Evaluation of a proof-of-concept implementation confirms that node-local centralized management of status information can be realized in a light-weight manner.
This paper presents a developing method for effective implementation of large-scale distributed sensing systems. Use of occam-pi programming language for simulation is yet implemented by code generator from a high-lev...
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ISBN:
(纸本)9781450366120
This paper presents a developing method for effective implementation of large-scale distributed sensing systems. Use of occam-pi programming language for simulation is yet implemented by code generator from a high-level tool. A complete program has local activities for sensing and distributed activities for data collection and distributed control. distributed algorithms are developed and fine-tuned by simulators. To validate and evaluate our proposed method, node local behavior was interpreted on target hardware for the practical deployment of wireless sensor networks.
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