检索结果-内蒙古大学图书馆

IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Adel Nadjaran Toosi Rodrigo N. Calheiros Ruppa K. Thulasiram Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Department of Computer Science University of Manitoba Canada

Cloud Federation is a recent paradigm that helps Infrastructure as a Service (IaaS) providers to overcome resource limitation during spikes in demand for Virtual Machines (VMs) by outsourcing requests to other federation members. IaaS providers also have the option of terminating spot VMs, i.e, cheaper VMs that can be canceled to free resources for more profitable VM requests. By both approaches, providers can expect to reject less profitable requests. For IaaS providers, pricing and profit are two important factors, in addition to maintaining a high Quality of Service (QoS) and utilization of their resources to remain in the business. For this, a clear understanding of the usage pattern, types of requests, and infrastructure costs are necessary while making decisions to terminate spot VMs, outsourcing or contributing to the federation. In this paper, we propose policies that help in the decision-making process to increase resources utilization and profit. Simulation results indicate that the proposed policies enhance the profit, utilization, and QoS (smaller number of rejected VM requests) in a Cloud federation environment.

关键词： Outsourcing Quality of service Mathematical model Equations Pricing Computational modeling Availability

来源：评论

学校读者我要写书评

暂无评论

Model-driven design plus artificial intelligence for wireless sensor networks software development

Model-driven design plus artificial intelligence for wireles...

引用

2nd International Workshop on Software Engineering for Sensor Network Applications, SESENA 2011, in Conjunction with the International Conference on Software Engineering, ICSE 2011

作者： Mülders, Peter Gruner, Stefan Thang, Nguyen Xuan Research Group for Software Science and Formal Methods Department of Computer Science Universiteit Van Pretoria Lynnwood Road 0002 Pretoria South Africa Distributed Systems Group Faculty of Electr. and Inform. University of Kassel Wilhelmshöher Allee 73 34121 Kassel Germany

ISBN: (纸本)9781450305839

To date, software development for wireless sensor network nodes is still characterized by low-level ad-hoc programming to a large extent. This short-paper argues for a methodologically more systematic approach on the basis of Model-Driven Engineering with CASE-Tool support, in combination with AI-based design choice optimizations during the MDE-steps of model-refinement and information-enrichment. Our work in this project is ongoing. © 2011 ACM.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

QoS-aware Deployment of Network of Virtual Appliances Across Multiple Clouds

QoS-aware Deployment of Network of Virtual Appliances Across...

引用

IEEE International Conference on Cloud Computing Technology and science (CloudCom)

作者： Amir Vahid Dastjerdi Saurabh Kumar Garg Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Parkville VIC Australia

Cloud computing paradigm allows on-demand access to computing and storages services over the Internet. To solve the complexity of application deployment in Cloud infrastructure, virtual appliances, pre-configured, ready-to-run applications are emerging as a breakthrough technology. However, an automated approach for deploying network of appliances is required to guarantee minimum deployment cost, low latency, and high reliability. In this paper, we propose and compare two different deployment approaches: Forward-checking-based backtracking (FCBB) and genetic-based. They take into account Quality of Service (QoS) criteria such as reliability, data communication cost, and latency between multiple Clouds to choose the most appropriate combination of virtual machines and appliances. We evaluate our approach using a real case study and different request types. Experimental results show both algorithms reach near optimal solution. Further, we investigate effects of factors such as latency requirements, and data communication between appliances on the performance of the algorithms and placement of appliances across multiple Clouds.

关键词： Home appliances Quality of service Servers Monitoring Cloud computing Availability

来源：评论

学校读者我要写书评

暂无评论

Optimization of Healthcare Emergency departments by Agent-Based Simulation

引用

Procedia computer science 2011年 4卷 1880-1889页

作者： Eduardo Cabrera Manel Taboada Ma Luisa Iglesias Francisco Epelde Emilio Luque Computer Architecture and Operating Systems Department (CAOS) University Autonoma of Barcelona (UAB) Spain Tom‘as Cerd‘a Computer Science School (UAB) Spain Hospital of Sabadell Consorci Sanitari Parc Tauĺı Barcelona Spain

This paper presents an Agent-Based modeling and simulation to design a decision support system (DSS) for the operation of Healthcare Emergency departments (ED). This DSS aims to aid EDs managers in setting up strategies and management guidelines to optimize the operation of EDs. This ongoing research is being performed by the Research Group on Individual Oriented Modeling (IoM) of CAOS in the University Autonoma of Barcelona (UAB) in close collaboration with Hospital ED Staff. The simulation main objective is to optimize the performance of such complex and dynamic Healthcare ED. Optimization is performed to find the optimal ED staff configuration, which consists of doctors, triage nurses, and admission personnel, i.e. a multidimensional problem. Two different indexes, to minimize patient waiting time, and to maximize patient throughput, were proposed and tested and their results obtained appying an exhaustive search technique, yield promising results and better understanding of the problem.

关键词： Optimization healthcare operational management emergency department agent-based simulation decision support systems

来源：评论

学校读者我要写书评

暂无评论

An Agent-Based Decision Support System for Hospitals Emergency departments

引用

Procedia computer science 2011年 4卷 1870-1879页

作者： Manel Taboada Eduardo Cabrera Ma Luisa Iglesias Francisco Epelde Emilio Luque Tomas Cerda Computer Science School University Autonoma of Barcelona(UAB) Spain Computer Architecture and Operating Systems Department (CAOS) UAB Spain Hospital of Sabadell Consorci Sanitari Parc Taulí Barcelona Spain

Modeling and simulation have been shown to be useful tools in many areas of the Healthcare operational management, field in which there is probably no area more dynamic and complex than hospital emergency departments (ED). This paper presents the results of an ongoing project that is being carried out by the Research Group in Individual Oriented Modeling (IoM) of the University Autonoma of Barcelona (UAB) with the participation of Hospital of Sabadell ED Staff Team. Its general objective is creating a simulator that, used as decision support system (DSS), aids the heads of the ED to make the best informed decisions possible. The defined ED model is a pure Agent-Based Model, formed entirely of the rules governing the behavior of the individual agents which populate the system. Two distinct types of agents have been identified, active and passive. Active agents represent human actors, meanwhile passive agents represent services and other reactive systems. The actions of agents and the communication between them will be represented using Moore state machines extended to include probabilistic transitions. The model also includes the environment in which agents move and interact. With the aim of verifying the proposed model an initial simulation has been created using NetLogo, an agent-based simulation environment well suited for modeling complex systems.

关键词： Healthcare operational management agent-based modelling individual oriented simulation emergency department decision support systems

来源：评论

学校读者我要写书评

暂无评论

MASPOT: A Mobile Agent System for Sun SPOT

MASPOT: A Mobile Agent System for Sun SPOT

引用

International Symposium on Autonomous Decentralized systems (ISADAS)

作者： Ramon Lopes Flavio Assis Carlos Montez LaSiD-Distributed Systems Laboratory DCC-Department of Computer Science UFBA-Federal University of Bahia Salvador Brazil DAS-Department of Automation and Systems UFSC Federal University of Santa Catarina Florianopolis Brazil

Mobile agents have been proposed as a means to address two important issues in the design of Wireless Sensor Networks (WSN): the need for reprogramming the network and decreasing energy expenditure. However, few mobile agent systems have been developed for WSN so far. In this paper we describe MASPOT, a mobile agent system for Sun SPOT, a WSN platform developed by Sun Microsystems. MASPOT provides a solution to the issues above and extends the range of Sun SPOT applications. To the best of our knowledge, MASPOT is the only Java-based mobile agent system for WSN that currently supports code migration. We describe the system and present the results of an experiment to evaluate the amount of energy spent during agent migration. It showed that migration spends around 0.03% of the nodes battery energy. Additionally, MASPOT uses only around 1.5% of the available flash memory of Sun SPOT nodes.

关键词： Mobile agents Sun Wireless sensor networks Base stations Batteries Software Temperature sensors

来源：评论

学校读者我要写书评

暂无评论

SMICloud: A Framework for Comparing and Ranking Cloud Services

SMICloud: A Framework for Comparing and Ranking Cloud Servic...

引用

IEEE International Conference on Utility and Cloud Computing (UCC)

作者： Saurabh Kumar Garg Steve Versteeg Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia CA Technologies Melbourne Australia

With the growth of Cloud Computing, more and more companies are offering different cloud services. From the customer's point of view, it is always difficult to decide whose services they should use, based on users' requirements. Currently there is no software framework which can automatically index cloud providers based on their needs. In this work, we propose a framework and a mechanism, which measure the quality and prioritize Cloud services. Such framework can make significant impact and will create healthy competition among Cloud providers to satisfy their Service Level Agreement (SLA) and improve their Quality of Services (QoS).

关键词： Quality of service Time factors Cloud computing Organizations Measurement Security Indexes

来源：评论

学校读者我要写书评

暂无评论

Influence of traffic management solutions on Quality of Experience for prevailing overlay applications

Influence of traffic management solutions on Quality of Expe...

引用

Conference on Next Generation Internet Networks, NGI

作者： Rafał Stankiewicz Piotr Chołda Jerzy Domżał Robert Wójcik Tobias Hoßfeld Thomas Zinner Simon Oechsner Frank Lehrieder Department of Telecommunications AGH University of Science and Technology Krakow Poland University of Würzburg Institute of Computer Science Chair of Distributed Systems Würzburg Germany

Different sorts of peer-to-peer (P2P) applications emerge every day and they are becoming more and more popular. The performance of such applications may be measured by means of Quality of Experience (QoE) metrics. In this paper, the factors that influence these metrics are surveyed. Moreover, the impact of economic traffic management solutions (e.g., proposed by IETF) on perceived QoE for the dominant overlay applications is assessed. The possible regulatory issues regarding QoE for P2P applications are also mentioned.

关键词： Streaming media Quality of service Availability Software Measurement Bandwidth Switches

来源：评论

学校读者我要写书评

暂无评论

BitTorrent's dilemma: Enhancing reciprocity or reducing inequity

BitTorrent's dilemma: Enhancing reciprocity or reducing ineq...

引用

Consumer Communications and Networking Conference, CCNC IEEE

作者： Adele L. Jia Lucia D'Acunto Michel Meulpolder Johan A. Pouwelse Dick H. J. Epema Parallel and Distributed Systems Group Department of Computer Science Delft University of Technology The Netherlands Technische Universiteit Delft Delft Zuid-Holland NL

Enhancing reciprocity has been one of the primary motivations for the design of incentive policies in BitTorrent-like P2P systems. Reciprocity implies that peers need to contribute their bandwidth to other peers if they want to receive bandwidth in return. However, the over-provisioning that characterizes today's BitTorrent communities and the development of many next-generation P2P systems with real-time constraints (e.g., for live and on-demand streaming) suggest that more effort can be devoted to reducing the inequity (i.e., the difference of service received) among peers, rather than only enhancing reciprocity. Inspired by this observation, in this work we analyze in detail several incentive mechanisms that are used in BitTorrent systems, and explore several strategies that influence the balance between reciprocity and equity. Our study shows that (i) reducing inequity leads to a better overall system performance, and (ii) the behavior of seeders (i.e., peers that hold a complete copy of the file and upload it for free) influences whether reciprocity is enhanced or inequity reduced.

关键词： Thin film transistors Bandwidth Analytical models Peer to peer computing Protocols Channel allocation Steady-state

来源：评论

学校读者我要写书评

暂无评论

Energy-aware data processing techniques for wireless sensor networks: A review

Energy-aware data processing techniques for wireless sensor ...

引用

3rd International Conference on Data Management in Grid and Peer-to-Peer systems, Globe 2010

作者： Chong, Suan Khai Gaber, Mohamed Medhat Krishnaswamy, Shonali Loke, Seng Wai Centre for Distributed Systems and Software Engineering Monash University 900 Dandenong Rd Caulfield EastVIC3145 Australia School of Computing University of Portsmouth Portsmouth HampshirePO1 3HE United Kingdom Department of Computer Science and Computer Engineering La Trobe University VIC3086 Australia

ISBN: (纸本)9783642230738

Extensive data generated by peers of nodes in wireless sensor networks (WSNs) needs to be analysed and processed in order to extract information that is meaningful to the user. Data processing techniques that achieve this goal on sensor nodes are required to operate while meeting resource constraints such as memory and power to prolong a sensor network’s lifetime. This survey serves to provide a comprehensive examination of such techniques, enabling developers of WSN applications to select and implement data processing techniques that perform efficiently for their intended WSN application. It presents a general analysis of the issue of energy conservation in sensor networks and an up-to-date classification and evaluation of data processing techniques that have factored in energy constraints of sensors. © Springer-Verlag Berlin Heidelberg 2011.

关键词： Sensor nodes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：