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Grounding Mobility Research – Ideas for a Research Agenda

Grounding Mobility Research – Ideas for a Research Agenda

引用

international conference on Mobile Business and Global Mobility Roundtable (ICMB-GMR)

作者： Hans Lehmann Eusebio Scornavacca School of Information Management Victoria University of Wellington Wellington New Zealand

ISBN: (纸本)9781424474233;9780769540849

Research into mobile business has grown significantly over the last decade, but seemingly in a haphazard and not always rigorous fashion. This was first observed in 2003 and then borne out by an in-depth analysis of hundreds of m-business research publications in 2006. Four years on, these notions and findings still suggest that a direction of future research with a firm empirical base is needed in the first instance. The research should, furthermore, also be tightly coupled with an equally firm objective to theory building in this ever more important sector of information and communications technology. This paper presents the argument that the Grounded Theory method of qualitative research combines both of these essential fiats. It has the rigour and empirical grounding demanded and aims exclusively at generating theory in domains where there are few. A research agenda based on the Grounded Theory methodology is set out and recommendations for future research directions and collaborations are offered for discussion.

关键词： Grounding Business communication Mobile communication Consumer electronics Internet Information management Computer networks distributed computing Mobile computing Mobile handsets

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The Geographic Structure Query Language Based on the Peer to Peer and Cooperating computing Hybrid Discovering Model

The Geographic Structure Query Language Based on the Peer to...

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

作者： Z. L. Chen L. Wu Z. Xie Faculty of Information Engineering China University of Geoscience Wuhan China

The management of the magnanimous spatial data needs the distributed cooperative GIS platform. This paper proposed the Peer To Peer and Cooperating computing Hybrid Discovering Model of distributed Geospatial Information. Based on the (Spatial Resource Discovery Agent (SRDA) and ordinary neighbor node, Combined with Spatial data model of MAPGIS7.0, this article brings up the geographic structure query language in P2P network (P2PGSQL), and has designed the interpreter of P2PGSQL. In the Peer To Peer and Cooperating computing Hybrid Discovering Model, this paper has designed the algorithms that construct the distributed hash table and decrease the delay. By discovering and performing the potential swaps that are beneficial to the match between overlay and physical network, it can reduce the average latency and improve the performance of the system. Based on the P2P Cooperating computing Hybrid Discovering Model, this article has given the method of the P2PGSQL in grid environment and built the mapping model of the global spatial query sentence to the local query sentence. With constituting a global spatial data resource catalog to record the distributing information of all spatial database on each node, P2PGSQL has backed up effective expression of spatial database management mission in grid environment. Hence, P2PGSQL can sustain the query of distribute spatial data in grid environment. This article has extended the grid spatial relation operation (Intersection, Union, Difference) and synthesized operation (Length, Buffer, intersecting region) and so on. The P2PGSQL can reduce the quantity of spatial data transmitting among nodes and enhance the capacity of parallel operation. At the same time, P2PGSQL can also sustain multi-spatial data model by the extension of structure data on the data type. At the end, an experimental instance of P2PGSQL has been carried out based on mapgis7.0 platform.

关键词： Spatial databases distributed databases Database languages Peer to peer computing Computational modeling Geographic Information Systems Catalogs

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Security issues in MANET: A review

Security issues in MANET: A review

引用

IFIP international conference on Wireless and Optical Communications networks (WOCN)

作者： Rashid Sheikh Mahakal Singh Chande Durgesh Kumar Mishra Acropolis Institute of Technology and Research Indore India Arjun Institute of Advanced Studies and Research Centre Indore India

Sometimes the physically distributed computing devices in a network may be interested in computing some function of their private inputs without disclosing these inputs to one another. This type of computation falls under the category of Secure Multiparty Computation (SMC). The solution to SMC problems in Mobile Ad hoc networks (MANET) can be found with the modification of the data inputs or with some anonymization technique. MANETs are the wireless networks of the mobile computing devices with no support of any fixed infrastructure. The mobile nodes use any of the radio technology like Bluetooth, IEEE 802.11 or Hiperlan for directly communicating with each other. The nodes behave as hosts as well as routers. The security challenges in the MANET arise due to its dynamic topology, vulnerable wireless link and nomadic environment. An identification mechanism is needed between the nodes using identification and the credentials. This security architecture simultaneously leads to privacy problems. Some mechanism is needed which prevents a node to learn the identity or the credentials of other nodes. To provide location privacy in MANET is a nontrivial task. Current routing protocols do not focus much on the security and the privacy issues. These aspects are postponed till further development. An authentication protocol is needed between nodes using some cryptographic technique. In service-oriented MANET the denial of the service must be taken care of so that the availability of the service is maintained. The security requirement of the ad hoc network depends on its application. For example, for a simple business meeting the requirement is mitigated and for the military battlefield it is severe. Thus no general security architecture can be developed for MANET. Specific security architecture is needed for specific application. Much security related work is still pending and will add to the standards as the physical deployment of the MANET will grow. In this paper, an empha

关键词： Ad hoc networks Mobile computing Presses Computational modeling Routing protocols Irrigation Aggregates

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A Hybrid and Secure Mechanism to Execute Parameter Survey Applications on Local and Public Cloud Resources

A Hybrid and Secure Mechanism to Execute Parameter Survey Ap...

引用

IEEE international conference on Cloud computing Technology and Science (CloudCom)

作者： Hao Sun Kento Aida Department of Information Processing Tokyo Institute of Technology Yokohama Japan Information Systems Architecture Research Division National Institute of Information Tokyo Japan

A parameter survey application (PSA) is a typical application running on high-performance computing (HPC) systems. A PSA consists of a lot of independent tasks with different input parameters that are executed in parallel on different CPU cores. Infrastructure-as-a-Service Cloud (IaaS Cloud) is expected to be used as an HPC infrastructure to run PSAs, and some reports have discussed hybrid execution mechanisms to utilize both local resources and IaaS Clouds. However, users still have security problems in running applications with confidential data on an IaaS Cloud. We propose a hybrid and secure execution mechanism to run PSAs utilizing both local computing resources with a batch scheduler and an IaaS Cloud. The proposed mechanism utilizes both local resources and IaaS Clouds to meet the deadline of user applications. We conducted experiments running a natural language processing application, which uses machine learning to detect abusive language on Internet bulletin board systems. The experimental results showed that the proposed mechanism effectively allocated resources and met the deadlines of the user application.

关键词： Logic gates Cloud computing Support vector machines Virtual private networks Training data Security Scheduling algorithm

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Improving simulation through advanced computing techniques: Grid computing and simulation interoperability 10

Improving simulation through advanced computing techniques: ...

引用

Simulation Winter conference

作者： Simon J. E. Taylor Navonil Mustafee Shane Kite Chris Wood Stephen J. Turner Steffen Straßburger ICT Innovation Group School of Information Systems Computing and Mathematics Uxbridge UK School of Business and Economics Swansea University Swansea UK Saker Solutions Upper Courtyard Alcester UK Saker Solutions Alcester UK Swansea University School of Business and Economics Wales UK Nanyang Technological University Parallel & Distributed Computing Centre School of Computer Engineering Singapore SINGAPORE Technische Universitat Ilmenau Ilmenau ThÃ¼ringen DE

ISBN: (纸本)9781424498642

Today, due to exciting developments in advanced computing techniques and technologies, many scientists can now make use of dedicated high speed networks and high performance computing. This so-called `e-Science' in enabling scientist across many fields to work together in global virtual research communities. What do these advancements mean for modeling and simulation? This advanced tutorial instigates two key areas that are affecting the way M&S projects are being developed and deployed. Grid computing addresses the use of many computers to speed up applications. Simulation Interoperability deals with linking together remote simulations and/or speeding up the execution of a single run. Through the use of case studies we hope to show that both these areas are making a major impact on the practice of M&S in both industry and science, as well as in turn supporting the future capabilities of e-Science.

关键词： Biological system modeling Computational modeling Grid computing Analytical models Middleware Mathematical model Software

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Dual-Phase Just-in-Time Workflow Scheduling in P2P Grid Systems

Dual-Phase Just-in-Time Workflow Scheduling in P2P Grid Syst...

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international conference on parallel Processing (ICPP)

作者： Sheng Di Cho-Li Wang Department of Computer Science University of Hong Kong Hong Kong China

This paper presents a fully decentralized just-in-time workflow scheduling method in a P2P Grid system. The proposed solution allows each peer node to autonomously dispatch inter-dependent tasks of workflows to run on geographically distributed computers. To reduce the workflow completion time and enhance the overall execution efficiency, not only does each node perform as a scheduler to distribute its tasks to execution nodes (or resource nodes), but the resource nodes will also set the execution priorities for the received tasks. By taking into account the unpredictability of tasks' finish time, we devise an efficient task scheduling heuristic, namely dynamic shortest makespan first (DSMF), which could be applied at both scheduling phases for determining the priority of the workflow tasks. We compare the performance of the proposed algorithm against seven other heuristics by simulation. Our algorithm achieves 20%~60% reduction on the average completion time and 37.5%~90% improvement on the average workflow execution efficiency over other decentralized algorithms.

关键词： Peer to peer computing Protocols Dynamic scheduling Equations Delay Mathematical model

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Sim-spm: A SimpleScalar-Based Simulator for Multi-level SPM Memory Hierarchy Architecture

Sim-spm: A SimpleScalar-Based Simulator for Multi-level SPM ...

引用

IEEE international conference on High Performance computing and Communications (HPCC)

作者： Xiaoguang Ren Yuhua Tang Tao Tang Sen Ye Huiquan Wang Jing Zhou National Laboratory for Parallel and Distributed Processing School of Computer National University of Defense Technology Changsha Hunan China

As a fast on-chip SRAM managed by software (the application and/or compiler), Scratchpad Memory (SPM) is widely used in many fields. This paper presents a Simple Scalar-based multi-level SPM memory hierarchy architecture simulator Sim-spm. We simulate the hardware of the multi-level SPM memory hierarchy successfully by extending Sim-outorder, which is an out-of-order simulator from Simple Scalar. Through the simulating memory method, the simulation framework of the multi-level SPM memory hierarchy has been built under the existing ISA (Instruction Set Architecture), which largely reduces the requirement to modify the existing compiler. The experimental results show that Sim-spm can accurately simulate the running state of the processor with a multi-level SPM memory hierarchy architecture, and it has a good prospect for the research of multi-level SPM memory hierarchy architecture.

关键词： Kernel Random access memory Libraries Memory management Memory architecture

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D-DOG: Securing Sensitive Data in distributed Storage Space by Data Division and Out-Of-Order Keystream Generation

D-DOG: Securing Sensitive Data in Distributed Storage Space ...

引用

IEEE international conference on Communications (ICC)

作者： J. Feng Y. Chen W.-S. Ku Z. Su Department of Electrical & Computer Engineering State University of New York Binghamton Binghamton NY USA Department of Computer Science & Software Engineering Aubum University Auburn AL USA Department of Computer Science Waseda University Shinjuku Tokyo Japan

Migrating from server-attached storage to distributed storage brings new vulnerabilities in creating a secure data storage and access facility. Particularly it is a challenge on top of insecure networks or unreliable storage service providers. For example, in applications such as cloud computing where data storage is transparent to the owner. It is even harder to protect the data stored in unreliable hosts. More robust security scheme is desired to prevent adversaries from obtaining sensitive information when the data is in their hands. Meanwhile, the performance gap between the execution speed of security software and the amount of data to be processed is ever widening. A common solution to close the performance gap is through hardware implementation. This paper proposes D-DOG (Data Division and Out-of-order keystream Generation), a novel encryption method to protect data in the distributed storage environments. Aside from verifying the correctness and effectiveness of the D-DOG scheme through theoretical analysis and experimental study, we also preliminarily evaluated its hardware implementation.

关键词： Out of order Secure storage Memory Protection Data security Information security Hardware Cloud computing Robustness Software performance

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Consistency Aware Dead Reckoning Threshold Tuning with Server Assistance in Client-Server-Based DVEs

Consistency Aware Dead Reckoning Threshold Tuning with Serve...

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international conference on Computer and Information Technology (CIT)

作者： Yusen Li Wentong Cai Parallel and Distributed Computing Center School of Computer Engineering Nanyang Technological University Singapore

In distributed virtual environments (DVEs), maintaining a consistent view of the virtual world among all users is a primary task. Due to the resource limitations such as network capacity and computational power, the consistency of the virtual world cannot be guaranteed sometimes. In this paper, we try to address this problem in client-server-based DVEs by considering server side network capacity limitation. We look at the position update packets from client to server and show the impact of packet loss due to server side network capacity limitation on the consistency of the virtual world. We assume clients use Dead Reckoning (DR) models to control position updates. In order to adapt client updates with the server side network capacity to avoid update packet loss, two server assistant DR threshold tuning policies for different updating schemas are proposed in this paper. The proposed tuning polices are validated to have good performance by simulation results.

关键词： Servers Avatars Tuning Predictive models Measurement Dead reckoning Bandwidth

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A Secure distributed Key Management Scheme for AD Hoc Network

A Secure Distributed Key Management Scheme for AD Hoc Networ...

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2010 IEEE international conference on Information Theory and Information Security(2010 IEEE 国际信息论与信息安全会议)

作者： Xianping Yuan Yan Xu Hong Zhong Jia Yu Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui Univers College of Information Engineering Qingdao University Qingdao China

An identity-based threshold key management scheme without secure channel is proposed for ad hoc network. The master private key, which is shared among all nodes by the Shamir's secret sharing scheme, is produced by all nodes when network is formed. The nodes’ public keys are derived from their identities. In order to get the private key, each node needs to prove their identity to distributed CAs using a zeroknowledge proof protocol to get the share of private key. Compared with former schemes, our scheme doesn’t need any local registration authority(LRA), which is easy to be compromised by adversary. When a node leaves the network, shares of the master private key would be renewed. In the end, we prove our scheme is correct and secure.

关键词： Ad hoc networks Public key Polynomials Protocols Wireless communication

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