Reducing the power consumption in integrated circuits will require the use of several techniques, many of which depends on accurate on-chip temperature measurement. Simultaneously, power consumption can be reduced by ...
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We present and evaluate Hydra, a virtualized testbed for realistic large-scale network simulations. While classic simulation tools only provide approximations of the protocol stack, Hydra virtualizes nodes running a c...
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ISBN:
(纸本)9781450301404
We present and evaluate Hydra, a virtualized testbed for realistic large-scale network simulations. While classic simulation tools only provide approximations of the protocol stack, Hydra virtualizes nodes running a complete Linux system. Mobility models and connection management integrated into Hydra allow for the simulation of various wireless networking scenarios. Our distributed virtualization approach achieves excellent scalability and the automated node setup makes it easy to deploy large setups with hundreds of nodes. Hardware-in-the-loop simulations are possible, using Hydra to augment a testbed of real devices. The ability to boot a Hydra node completely from an USB flash drive enables the user to convert temporarily unused computer resources into a testbed without the need for any complex setup. Copyright 2010 ACM.
At present, the rapid development of Online Social Networks (OSN) has strong influence on our global community's communication patterns. This primarily manifests in an exponentially increasing number of users of S...
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The proceedings contain 176 papers. The topics discussed include: performance evaluation of database designs;performance of weighted fair queuing system with multi-class jobs;enhanced DR-tree for low latency filtering...
ISBN:
(纸本)9780769540184
The proceedings contain 176 papers. The topics discussed include: performance evaluation of database designs;performance of weighted fair queuing system with multi-class jobs;enhanced DR-tree for low latency filtering in publish/subscribe systems;RED and WRED performance analysis based on superposition of N MMBP arrival process;performance analysis of VP controller on DCCP traffic;comparative analysis and evaluation of Botnet command and control models;simulation-based performance evaluation of the SNDP protocol for infrastructure WMNs;an adaptive routing protocol for bus networks;adaptive clustering protocol for wireless networks;multicast QoS routing using collaborative path exploration;high performance computing on demand: sharing and mutualization of clusters;and an implementation of NaryRAID.
Online social networks with millions of users are very popular nowadays. They provide a platform for the users to present themselves and to interact with each other. In this paper, we present a totally distributed pla...
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This paper proposes an edge-adaptive interpolation algorithm for Super-resolution reconstruction. The objective is to recover high-resolution image from low-resolution image. At first, from a low-resolution image, a h...
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Wireless mesh networks (WMNs) are drawing attention for commercial applications. Service should be uninterrupted when roaming from one domain to another, security should be maintained, and billing should be accurate. ...
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作者:
Zhuge, HaiChinese Acad Sci
Inst Comp Technol Knowledge Grid Res Grp Key Lab Intelligent Informat Proc Beijing 100190 Peoples R China
Humans have been recognizing, establishing and making use of various relations consciously and unconsciously since the formation of human society. Waving and maintaining various relations accompany everyone's life...
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ISBN:
(纸本)9780769540184
Humans have been recognizing, establishing and making use of various relations consciously and unconsciously since the formation of human society. Waving and maintaining various relations accompany everyone's life. Humans' social behaviors create or emphasize relations. Various networks evolve with the development of society. Some relational networks gradually become independent of individuals' life during evolution so that they become a part of knowledge and culture sharable cross generations. The study of social relations trace back to the age of Laozi (576-BC), Confucius (551-479 BC), Thales (624 BC-546 BC) and Socrates (469 BC-399 BC). The formal definition of general relation traces to the invention of set theory in 1874. Humans have intelligence to observe and participate in social processes, to think, and to know the effect of establishing a relation. Humans can also actively select appropriate relations and persons according to requirement, situation and social rules. Machines are obviously limited in these abilities. Various graph-based models have been used to connect resources in the cyber space. Two issues are fundamental: (1) machines know little relation in human society and the nature, data structures in machines are for machines to process not for humans to read, so it is not realistic to expect machines to discover social and natural laws and resolve relevant issues without human instruction;and, (2) machines are hard to know the effect of establishing and making use of relations, and to explain computing result according to society and nature. The cause is that machines do not have any worldview. Connecting various networks and machines with nature, society, and even human minds can create a new world where individuals have semantic images that can enhance mutual understanding. The semantic images can be constructed by a Semantic Link Network SLN consisting of nodes with rich semantics, semantic links between nodes, and rules for reasoning, influen
Current distributedcomputing infrastructures, such as peer-to-peer networks, grids, and more recently clouds, make sharing and trading resources ubiquitous. In these large distributed systems, rational users are both...
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ISBN:
(纸本)9783642152764
Current distributedcomputing infrastructures, such as peer-to-peer networks, grids, and more recently clouds, make sharing and trading resources ubiquitous. In these large distributed systems, rational users are both providers and consumers of resources. Currently, there is growing interest in exploiting economic models for the allocation of shared computing resources that incentivize rational users. However, when the number of resource types and users increases, computational complexity of the allocation algorithms grows rapidly and efficiency deteriorates. In this paper, we propose a scalable distributed market framework for the allocation of shared resources in large distributed systems. We use mechanism design to create a pricing scheme that allocates a request for multiple resource types, by trading economic efficiency for computational efficiency, strategy-proof and budget-balance. To address scalability, our proposed framework leverages on a peer-to-peer overlay for resource discovery and management. We prototype our framework using Free Pastry, a popular overlay network based on the Pastry protocol. We show that our scheme is efficient and scalable using both simulation experiments and results from the deployment on Plant Lab.
The problem of sensor deployment to achieve k-coverage of a field, where every point is covered by at least k sensors, is very critical in the design of energy-efficient wireless sensor networks (WSNs). It becomes mor...
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ISBN:
(纸本)9783642113215
The problem of sensor deployment to achieve k-coverage of a field, where every point is covered by at least k sensors, is very critical in the design of energy-efficient wireless sensor networks (WSNs). It becomes more challenging in mission-oriented WSNs, where sensors have to move in order to k-cover a region of interest in the field. In this paper, we consider the problem of k-coverage in mission-oriented mobile WSNs which we divide into two sub-problems, namely sensor placement and sensor selection. The sensor placement problem is to identify a subset of sensors and their locations in a region of interest so it is k-covered with a minimum number of sensors. The sensor selection problem is to determine which sensors should move to the above-computed locations in the region while minimizing the total energy consumption due to sensor mobility and communication. Simulation results show that our solution to the k-coverage problem in mission-oriented mobile WSNs outperforms an existing one in terms of the number of sensors needed to achieve k-coverage of a region of interest in the field as well as their total energy consumption.
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