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2011 ASHRAE Winter Conference

作者： Buccellato, Aimee P. C. Brenner, Paul Go, David B. Jansen, Ryan Ward Jr., Eric M. School of Architecture University of Notre Dame Notre Dame IN United States Center for Research Computing University of Notre Dame Notre Dame IN United States Department of Computer Science Engineering University of Notre Dame Notre Dame IN United States Department of Aerospace and Mechanical Engineering University of Notre Dame Notre Dame IN United States

Environmentally Opportunistic computing (EOC) is a sustainable computing concept that capitalizes on the physical and temporal mobility of modern computer processes and enables distributed computing hardware to be integrated into a facility - or network of facilities - to optimize the consumption of computational waste heat in the built environment. The first implementation of EOC is the prototype Green Cloud Project at Notre Dame, where waste heat from computing hardware is used to offset the heating demands of the parent facility. EOC performs as a "system-source" thermal system, with the capability to create heat where it is locally required, to utilize energy when and where it is least expensive, and to minimize a building's overall energy consumption. Instead of expanding active measures (i.e. mechanical systems) to contend with thermal demands, the EOC concept utilizes existing high performance computing and information communications technology coupled with system controls to enable energy hungry, heat producing data systems to become service providers to a building while concurrently utilizing aspects of a building's HVAC infrastructure to cool the machines;essentially, the building receives 'free' heat, and the machines receive free' cooling. In this work, we present the vision of EOC and the current performance capabilities of the Green Cloud prototype from in situ measurements. Recognizing EOCs potential to achieve a new paradigm for sustainable building, the research also begins to explore the integration of EOC at the building scale, acknowledging concept-critical collaboration required between architects, computational hardware and software owners, and building systems engineers. © 2011 ASHRAE.

关键词： Waste heat

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A computer-supported collaborative learning platform based on clouds

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Journal of Computational Information Systems 2011年第11期7卷 3811-3818页

作者： Li, Jiandun Peng, Junjie Zhang, Wu Han, Fangfang Yuan, Qin Joint Lab of Cloud Computing School of Computer Engineering and Science Shanghai University Shanghai 200072 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

Computer-supported collaborative learning (CSCL) is an emerging branch of learning science concerned with studying how people can learn together with the help of computers. As an indispensable ingredient, computer mediation evolves through couples of phases, e.g. centralized server, peer-to-peer network, grid computing. Nevertheless, with daily rising trend on requirement's dynamic changes in service, existing models fall short to respond on demand. Thus, in this paper, by taking advantage of cloud computing, we propose a feasible CSCL platform and the experiments show that it can not only fulfill the basic requirement of CSCL, but also respond to learner's dynamic need on demand. Copyright © 2011 Binary Information Press.

关键词： Peer to peer networks

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Improving the robustness of model exchanges using product modeling "Concepts" for IFC schema

Improving the robustness of model exchanges using product mo...

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2011 ASCE International Workshop on computing in Civil engineering

作者： Venugopal, Manu Eastman, Charles Sacks, Rafael Teizer, Jochen School of Civil and Environmental Engineering Georgia Institute of Technology 790 Atlantic Dr. N.W. Atlanta GA 30332-0355 United States College of Computing and College of Architecture Georgia Institute of Technology Atlanta GA 30332-0155 United States Faculty of Civil and Environmental Engineering Technion-Israel Institute of Technology Haifa 32000 Israel School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332-0355 United States

Empirical approaches to define Model View Definitions (MVD) for exchange specifications exist and are expensive to build, test, and maintain. This paper presents the novel idea of developing modular and reusable MVDs from IFC Product Modeling Concepts. The need and application for defining model views in a more logical manner is illustrated with examples from current MVD development. A particular focus of this paper is on precast entities in a building system. Presented is a set of criteria to define fundamental semantic concepts articulated within the Industry Foundation Classes (IFC) to improve the robustness of model exchanges. © 2011 ASCE.

关键词： Semantics

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Artificial Bee Colony model for routing and wavelength assignment problem

Artificial Bee Colony model for routing and wavelength assig...

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International Conference on Transparent Optical Networks

作者： Arash Rashedi Yousef S. Kavian Zabih Ghassemlooy Department of Computer Architecture Islamic Azad University Iran Faculty of Engineering Shahid Chamran University Ahvaz Iran School of Computing Engineering and Information Sciences Northumbria University UK

ISBN: (纸本)9781457708817

In this paper a novel approach for modelling Routing and Wavelength Assignment (RWA) problem in wavelength-routed Dense Wavelength Division Multiplexing (DWDM) optical networks is proposed. A new idea based on Artificial Bee Colony (ABC) algorithm is introduced for solving RWA problem which is known to be an NP-hard problem. In the proposed ABC-RWA approach every food source represents a possible and feasible lightpath between each original and destination node pair in demand matrix. The positions of food sources are modified by some artificial bees in the population where the aim is to discover the places of food sources. The food source with the highest nectar value seems to be a solution which is evaluated by the fitness function. The simulation results demonstrate the ability and efficiency of proposed approach for solving RWA in real-world optical networks. The proposed approach could be extended for dynamic RWA schemes in real-time applications and employed by network resilience architectures.

关键词： Routing Wavelength assignment Algorithm design and analysis Clustering algorithms Optimization Simulation

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Dynamic routing and wavelength assignment: Artificial bee colony optimization

Dynamic routing and wavelength assignment: Artificial bee co...

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International Conference on Transparent Optical Networks

作者： Arash Rashedi Yousef S. Kavian Karim Ansari-Asl Zabih Ghassemlooy Department of Computer Architecture Islamic Azad University Iran Faculty of Engineering Shahid Chamran University Ahvaz Iran School of Computing Engineering and Information Sciences Northumbria University UK

In this paper an application of intelligent systems for optical networks design is proposed. The Routing and Wavelength Assignment (RWA) in Dense-Wavelength-Division-Multiplexing (DWDM) optical networks under dynamic traffic patterns is addressed. We mainly focus on how to apply Artificial Bee Colony (ABC) algorithm to solve dynamic RWA problem by minimizing the blocking probability for a sequence of arrival connection requests subject to total number of wavelengths in optical network and wavelength continuity constraints. Simulation results demonstrate that the proposed ABC based DRWA algorithm has better performance in reducing the blocking probability comparing to Fixed-alternate routing algorithm.

关键词： Heuristic algorithms Routing Wavelength assignment Simulation Algorithm design and analysis Optimization

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A scheduling algorithm for private clouds

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Journal of Convergence Information Technology 2011年第7期6卷 1-9页

作者： Li, Jiandun Peng, Junjie Zhang, Wu School of Computer Engineering and Science Shanghai University Shanghai 200072 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Science Beijing 100190 China

In contrast with public clouds, private clouds have some unique features, especially when related to workflow scheduling. Of course, the tradeoff problem between power and performance remains to be one of the key concerns. Based on our previous research, in this paper, we propose a hybrid energy-efficient scheduling algorithm using dynamic migration. The experiments show that it can not only reduce the response time, conserve more energy, but also achieve higher level of load balancing.

关键词： Scheduling algorithms

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An energy-efficient scheduling approach based on private clouds

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Journal of Information and Computational Science 2011年第4期8卷 716-724页

作者： Li, Jiandun Peng, Junjie Lei, Zhou Zhang, Wu School of Computer Engineering and Science Shanghai University Shanghai 200072 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Science Beijing 100190 China

With further development and wide acceptance of cloud computing, lots of companies and colleges decide to take advantage of it in their own data centers, which is known as private clouds. Since private clouds have some unique characteristics and special requirements, it is still a challenging problem to effectively schedule virtual machine requests onto compute nodes, especially with multiple objectives to meet. In this paper, we explore couples of characteristics related to workflow scheduling in the scenario of private clouds and propose a hybrid energy-efficient scheduling approach. The experiments show that it can save more time for users, conserve more energy and achieve higher level of load balancing. Copyright © 2011 Binary Information Press.

关键词： Cloud computing

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An Ontology-Based Approach to Adaptive Home Careflows

An Ontology-Based Approach to Adaptive Home Careflows

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International Workshop on Database and Expert Systems Applications

作者： Abdel-Rahman Hani Tawil Anousak Litnhouvongs Quentin Chevalier Adel Taweel School of Architecture Computing & Engineering University of East London UK ISIS Engineering School in Health Information Systems Champollion University Castres France Department of Informatics/Public Health Sciences Kings College London UK

In the healthcare domain, a profusion of workflows are utilised and lots of implicit knowledge is used by domain experts in their daily activities. Ontologies can facilitate the personalized construction of care workflows (care flows) and guide their management in contingency cases, thus allowing them to deviate from their standard prescribed static definition. In this paper we propose a formalization of workflow to automatically adapt the process of homecare for elderly people. We use an ontology of Business Process Modeling Notations(BPMN) associated with both Actor and Case Profile Ontologies to dynamically build flexible care flows capable of guiding the continuity of care.

关键词： Ontologies Adaptation models Business OWL Diseases Senior citizens

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A new approach to evaluating security assurance

A new approach to evaluating security assurance

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International Symposium on Information Assurance and Security (IAS)

作者： Moussa Ouedraogo Haralambos Mouratidis Artur Hecker Cedric Bonhomme Djamel Khadraoui Eric Dubois David Preston School of Architecture Computing and Engineering University of East London UK Telecom ParisTech LTCI-CNRS France Public Research Center Henri Tudor Kirchberg Luxembourg

This paper first analyzes the current gap in the literature in security assurance. It then proposes new metrics for the appraisal of security assurance at runtime. Our metrics are based on key concepts pertinent to gaining confidence on a security mechanism to meet its functions. Such parameters include: security correctness; security effectiveness and the quality of the security verification process. Validation of our approach has been achieved through tool implementation, and application to another of security components including firewall, DNS and antivirus.

关键词： Security Measurement Availability Probes Risk management Fires

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Hard to access the information in the healthcare system? i See! - An innovative touch-screen information board for pediatric hospitals

Hard to access the information in the healthcare system? i S...

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2011 9th IEEE International Conference on Pervasive computing and Communications Workshops, PERCOM Workshops 2011

作者： Tseng, Rung-Yu Chuang, Kevin Hermann, Kristin Koehler, Jon Ellen Yi-Luen Do College of Architecture Georgia Institute of Technology Atlanta GA 30332 United States School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States Health System Institute Georgia Institute of Technology Atlanta GA 30332 United States College of Computing Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9781612849379

Confusion, frustration and anxiety are caused by the ineffective communication in healthcare system. Patients and family members usually have a hard time to acquire necessary information in hospitals. The healthcare literacy, a wide range of patient-age population, and the text-only teaching sheets are important factors to block the communication. Therefore, the proposed work presents an innovative information board that is designed specifically for current pediatric healthcare environment to deliver messages more effectively through a fun and interactive approach. The I See! System carries four goals: Inform, Set expectation, Educate and Ease Anxiety (I.S.E.E). The innovative I See! System achieves these goals through categories, such as introduction video clip, interactive games, key words section and parents' place. Using different sections in the module, patients and families can engage more effectively in medical procedures. The distinguishing features in I See! module are Age-Adaptable, Audio-Visual, Multi-Lingual, Multi-Sensory, Interactive and Procedural. In addition, this module is a mobile, touch-screen and web-based appliance to prepare patients and families well to take the examinations in hospitals. Lastly, this work also discusses how the information in healthcare system could be delivered to patients and families more efficiently. © 2011 IEEE.

关键词： Hospitals

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