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What can you say and what does it mean?

What can you say and what does it mean?

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international conference on Collaborative computing: networking, Applications and Worksharing (CollaborateCom)

作者： Jon A. Solworth University of Illinois Chicago Chicago IL USA

This paper examines some of the criteria for a certificate architecture that supports trusted collaboration. Key to this support are: (1) the separation of statements from the actions they engender and (2) the ability to make arbitrary statements. The separation of statement from action enables organizations to set their own policies and therefore control what is authorized in response to a statement. The open ended nature to allow arbitrary statements to be created enables the signer to fully specify her intentions. It should be possible to make these statements arbitrarily precise, by tying the statements to their (semantic) contexts. Furthermore, we argue that it is important not only to support completely formalizable statements but also informal statements as well. We then describe an architecture we are building which meets the above criteria and give examples of its efficacy

关键词： Authentication Collaboration distributed computing Physics computing Government Buildings Authorization Law Legal factors Painting

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An Attribute-Based distributed Access Control for Blockchain-enabled IoT

An Attribute-Based Distributed Access Control for Blockchain...

引用

IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Peng Wang Yanlin Yue Wen Sun Jiajia Liu School of Cyber Engineering Xidian University Xian Shaanxi P.R. China School of Cybersecurity Northwestern Polytechnical University Xian Shaanxi P.R. China

ISBN: (纸本)9781728133171

In IoT, a flexible and trustworthy access control framework is of significance to ensure the security of lightweight IoT devices. The conventional centralized access control framework is no longer fit for the open and large-scale IoT environments. In this paper, we propose an attribute-based distributed access control framework (ADAC) for IoT using blockchain technology. The attributes, such as manufacturer and object-specified attribute, are considered in the proposed ADAC for more fine-grained access control in the open and lightweight IoT devices. Particularly, we design a smart contract system, which includes a subject contract (SC), an object contract (OC), an access control contract (ACC) and multiple policy contracts (PCs), to manage and access attributes of IoT devices for distributed and trustworthy access control (DTAC). SC and OC are responsible for managing subject attribute and object attribute information, respectively. PCs are used to manage access control policies. ACC performs authorization judgment by accessing attributes and policies. Finally, a case study is performed to demonstrate the workflow and show that ADAC could achieve fine-grained and flexible access control for IoT.

关键词： Access control Contracts Peer-to-peer computing Internet of Things Logic gates

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Emotion Classification of Mandarin Speech Based on TEO Nonlinear Features

Emotion Classification of Mandarin Speech Based on TEO Nonli...

引用

ACIS international conference on Software Engineering, Artificial Intelligence, networking, and Parallel/distributed computing (SNPD)

作者： Gao Hui Chen Shanguang Su Guangchuan Astronaut Research and Training Center of China Beijing China Beijing Institute of Technology Beijing China

To study effective speech features which can represent different emotion styles in mandarin speech, nonlinear features based on Teager Energy Operator(TEO) are researched. Neutral state and 3 emotional states (i.e. happiness, anger and sadness) are classified from the mandarin speech database. MFCC extraction and HMM-based emotion recognition are used as baseline system to evaluate the emotional classification performance of TEO-based features. In comparison with MFCC, while text- dependent, improvements of classification capacity are obtained when using all 4 nonlinear features (i.e. NFD_Mel, AF_Mel, DAF_Mel, AM_SBCC). While text-independent, the performance of emotion classification are improved by using NFD_Mel, AF_Mel and DAF_Mel, but deteriorated by using AM_SBCC. The results of classification demonstrate that the nonlinear features based on TEO, when using NFD_Mel, AF_Mel and DAF_Mel, are better able to represent different emotion styles in speech than that of MFCC.

关键词： Speech analysis Emotion recognition Speech recognition Mel frequency cepstral coefficient Auditory system Hidden Markov models Software engineering Artificial intelligence distributed computing Space technology

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Reliable and distributed Power Optimized Routing in Multihop Cooperative Networks

Reliable and Distributed Power Optimized Routing in Multihop...

引用

international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Zahra Mobini Saadan Zokaei MohammadAli Mohammadi Department of Electrical Engineering K.N. Toosi University of Technology Tehran Iran

In this paper focusing on multihop decode and forward ad hoc network, a distributed power optimized cooperative algorithm based on greedy geographical routing (POCGR) is proposed. We are concerned about optimizing the transmit power and reducing the total number of hops in a multihop wireless relay network jointly. We propose POCGR routing algorithm which minimizes the total power consumption while guarantying the certain outage probability. Moreover, POCGR brings the network coverage improvement of cooperative transmission to reduce the number of required hops per route. The relay selection and power allocation schemes are analytically derived and implemented in a distributed manner in the proposed algorithm. The main contribution of the proposed POCGR is to utilize two aforementioned advantages of cooperative transmission together from physical to network layer. Simulation results reveal that POCGR achieves 67.05% up to 81.8% power efficiency with respect to non-cooperative well-known greedy geographical routing algorithm. Furthermore, the number of total end-to-end hops can reduce by half compared to the existing geographical routing algorithms.

关键词： Relays Routing Algorithm design and analysis Resource management Ad hoc networks Signal to noise ratio Wireless communication

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Fog computing Solution for distributed Anomaly Detection in Smart Grids

Fog Computing Solution for Distributed Anomaly Detection in ...

引用

IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Radwa El-Awadi Ana Fernández-Vilas Rebeca P. Díaz Redondo Information Technology and Communications University of Vigo Vigo Spain Telematics Engineering Information & Computing Lab AtlantTIC Research Center University of Vigo Vigo Spain

ISBN: (纸本)9781728133171

Smart Grid is considered entirely indispensable in the next generation of electricity networks since shifting from the conventional to the cyber-physical power grids; relying on the Advanced Metering Infrastructures (AMIs) where a bidirectional communication with the utility provider supports improved reliability and satisfaction of customers' needs. Moreover, Smart Grid promises self-healing, i.e., automatic and quick detection and analysis of faults and failures. Unfortunately, the new grid turns into an information system and as such, it becomes vulnerable to cyber-risks and cyber-threats so that specific cyber-attacks can be directed to either Smart Grids or Microgrids (small-scale form of grids that contain distributed generators and power-storage units). In this new scenario, it is highly required to be cyber-resilient and to detect anomalies in the Smart Grid such as misusage, system faults or cyber-security incidents. Although anomalies could be detected in a holistic approach over a Cloud computing infrastructure, this research paper proposes Fog computing model to detect the anomalous patterns in the electricity consumption data by means of collaboration of distributed devices at the edge of Smart Grid network enough in advance (reducing communication latencies). The implementation of the proposed solution follows the Open-Fog Reference Architecture (RA) and a Microgrid on premises of the university of Vigo for a preliminary result as a proof of concept.

关键词： Smart grids Data models Anomaly detection Hidden Markov models Edge computing Predictive models Buildings

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Large-scale Network Topology Generation for Emulation Environment

Large-scale Network Topology Generation for Emulation Enviro...

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The First international conference on networking and distributed computing(第一届网络与分布式计算国际会议 ICNDC 2010)

作者： Xu Fei Li Jin Kuang Xiao-hui Huang Min-huan Che Yong-gang National Key Laboratory of Science and Technology on Information System Security Beijing Institute National Key Laboratory of Science and Technology on Information System Security Beijing Institute National Laboratory for Parallel and Distributed Process National University of Defense Technology

Network emulation environment is great importance to the research of network protocols, applications and security mechanism. Large-scale network topology generation b one of key technologies to construct network emulation environment. In this paper, a new large-scale network topology generation framework called LSNTGF is proposed, which divides the network topology into three hierarchies: AS, router and terminal node. It contains the assignment mechanism to bandwidth of each link and IP address of each node. The framework is evaluate by implementation, and the result illustrate it is efficient to network emulation environment for network protocols and security research.

关键词： Large-scale network topology generation bandwidth assignment IP address assignment

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Combining Color, Texture and Region with Objects of User's Interest for Content-Based Image Retrieval

Combining Color, Texture and Region with Objects of User's I...

引用

ACIS international conference on Software Engineering, Artificial Intelligence, networking, and Parallel/distributed computing (SNPD)

作者： Muwei Jian Junyu Dong Ruichun Tang Department of Computer Science Ocean University of China Qingdao China

Content-based image retrieval (CBIR) systems normally return the retrieval results according to the similarity between features extracted from the query image and candidate images. In certain circumstance, however, users concern more about objects of their interest and only wish to retrieve images containing relevant objects, while ignoring irrelevant image areas (such as the background). Previous work on retrieval of objects of user's interest (OUT) normally requires complicated segmentation of the object from the background. In this paper, we propose a method that utilize color, texture and shape features of a user specified window containing the OUI to retrieve relevant images, whereas complicated image segmentation is avoided. We use color moments and subband statistics of wavelet decomposition as color and texture features respectively. The similarity is first calculated using these features. Then shape features, generated by mathematical morphology operators, are further employed to produce the final retrieval results. We use a wide range of color images for the experiments and evaluate the performance of the proposed method in different color spaces, including RGB, HSV, YCbCr. Although simple, the method has produced promising results.

关键词： Image retrieval Content based retrieval Image segmentation Shape Feature extraction Statistics Information retrieval Software engineering Artificial intelligence distributed computing

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Causality of messages in object-based systems

Causality of messages in object-based systems

引用

international conference on Information networking

作者： Y. Timura K. Tanaka M. Takizawa Department of Computers and Systems Engineering Tokyo Denki University Japan

ISBN: (纸本)0769509517

distributed applications are realized by cooperation of a group of multiple objects. An object multicasts a message to multiple destinations and sends in parallel multiple messages to multiple destinations, i.e. parallel-cast. The object receives multiple messages in conjunctive and disjunctive receipt. We newly define a novel precedent relation of messages exchanged among objects in presence of multi- and parallel-cast and conjunctive- and disjunctive-receipt of messages.

关键词： Application software distributed computing Unicast Physics computing Systems engineering and theory Protocols Encapsulation Computer networks Databases Network servers

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Design and Implementation of distributed Video AI Super-Resolution Reconstruction System

Design and Implementation of Distributed Video AI Super-Reso...

引用

Software Engineering, Artificial Intelligence, networking and Parallel/distributed computing (SNPD-Winter), ACIS international Winter conference on

作者： Jingtao Shang Yangliu Guo Taolong Zhou Wei Li China North Vehicle Research Institute Beijing China Communication University of China School of Computer and Cyber Sciences Beijing China China Industrial Control Systems Cyber EmergencyResponse

This article proposes a distributed video AI super-resolution reconstruction solution based on MapReduce to address the issue of slow video super-resolution reconstruction in a single-machine environment. The solution utilizes scene detection algorithms and precise video segmentation algorithms to divide long videos into multiple video segments based on scenes. These segments are then assigned to different processing nodes for parallel processing, and finally merged to reduce the time required for video AI super-resolution reconstruction. Experimental results demonstrate that this solution effectively improves the speed of video AI super-resolution reconstruction. In addition, this article addresses the issues of low efficiency and low storage space utilization in the distributed storage system HDFS (Hadoop distributed File System) when storing small files, specifically video segments. It proposes an optimized storage solution based on HDFS and Redis. This solution merges small files and constructs a small file merging and storage model on Redis, effectively alleviating the memory pressure on the NameNode in HDFS when storing a massive number of small files. Experimental results demonstrate that this solution sacrifices a certain degree of read/write performance but mitigates the rapid growth of NameNode memory. This solution holds significant theoretical and practical significance.

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Bandwidth-satisfied relay-selection scheme for wireless multicast networks with cooperative communications

Bandwidth-satisfied relay-selection scheme for wireless mult...

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11th international conference on Wireless Communications, networking and Mobile computing (WiCOM 2015)

作者： Yi Chen Ge Gao Shengbin Liao Huaxiong Yao School of Computer Science Huazhong Normal University Wuhan China School of Computer Science Wuhan University China National Engineering Research Center Huazhong Normal University Wuhan China

ISBN: (纸本)9781510821279

Cooperative communication is an efficient technology to achieve high bandwidth demands and wide error-prone client coverage. However, the previous cooperative multicast protocols suffer from bandwidth-violation problem while selecting relay nodes, namely, the cooperative hidden route problem (CHRP) by distributed protocols in wireless multicast networks. In this paper, a novel relay selection algorithm that can avoid the CHRP is proposed, and a bandwidth-satisfied multicast cooperative relay selection scheme is constructed. Moreover, to optimize the cooperative performance, we provide theory analysis for selecting a relay. Simulations results show that the proposed algorithm can efficiently mitigate multicast transmission errors and improve network throughput in a distributed wireless environment by more than 10%.

关键词： Cooperative Communications Multicast Relay-Selection Wireless Networks Multicast cooperative communication Wireless networks CYHR1 gene distributed protocol relay Multicast protocols selection algorithm wireless Network throughput

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