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International Conference on computer Supported Cooperative Work in Design

作者： Nunes, Vanessa Tavares Werner, Cláudia M. Lima Santoro, Flávia Maria COPPE/PESC - Systems Engineering and Computer Science Program - UFRJ PO Box 68511 21945-970 Rio de Janeiro Brazil NP2Tec and Postgraduate Information Systems Program UNIRIO Rio de Janeiro Brazil

ISBN: (纸本)9781457703874

Dynamism of day-to-day activities in organizations is inextricably linked and there is a variety of information, insight and reasoning being processed between people and systems, in carrying out a business process. We argue that flexibility in processes could be managed in real time, using context information collected in the work environment. This paper proposes a context management architecture approach that aims to improve and automate dynamic process adaptation. We explain how process adaptation may occur in real time and discuss a scenario for this proposal © 2011 IEEE.

关键词： Process design

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A Parametric QoE Video Quality Estimator for Wireless Networks

A Parametric QoE Video Quality Estimator for Wireless Networ...

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Institute of Electrical and Electronics Engineers Globecom Workshops

作者： E. Cerqueira Augusto Neto M. Curado A. Riker R. Immich H. Barros E. Aguiar A. Abelem Federal University of Para (UFPA) Federal University of Ceara Department of Informatics Engineering (DETI) Fortaleza-CE Institute of Telecommunications Aveiro University of Coimbra Department of Informatics Engineering (DEI) Federal University of Rio Grande do Norte Post Graduation Program in Computer Systems (PPgSC)

ISBN: (纸本)9781467349420

The development of real-time quality estimator schemes for emerging Internet videos with different content types remains a significant challenge and is crucial for the success of wireless multimedia systems. However, currently in-service assessment schemes fail in capturing subjective aspects of multimedia content related to the user perception. Therefore, this paper proposes an on-the-fly parametric video quality estimator approach (called MultiQoE) for real-time video streaming applications. Experiments in a Wireless Mesh Network (WMN) scenario were carried out to show the accuracy, benefit, and impact of MultiQoE compared to widely used Quality of Experience (QoE) subjective, objective and parametric methods.

关键词： Quality of Experience Video Streaming Wireless Mesh Networks Service Assessment

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Hardware reuse in modern application-specific processors and accelerators

Hardware reuse in modern application-specific processors and...

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2011 14th Euromicro Conference on Digital System Design: Architectures, Methods and Tools, DSD 2011

作者： Nery, Alexandre S. Jozwiak, Lech Lindwer, Menno Cocco, Mauro Nedjah, Nadia França, Felipe M.G. LAM - Computer Architecture and Microelectronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Brazil Department of Electronics Engineering and Telecommunications Faculty of Engineering Universidade do Estado do Rio de Janeiro Brazil Department of Electrical Engineering - Electronic Systems Eindhoven University of Technology Netherlands Silicon Hive - Intel UMG Netherlands

ISBN: (纸本)9780769544946

Effective exploitation of the application-specific parallel patterns and computation operations through their direct implementation in hardware is the base for construction of high-quality application-specific (re-) configurable application specific instruction set processors (ASIPs) and hardware accelerators for modern highly-demanding applications. Although it receives a lot of attention from the researchers and practitioners, a very important problem of hardware reuse in ASIP and accelerator synthesis is clearly underestimated and does not get enough attention in the published research. This paper is an effect of an industry and academic collaborative research. It analyses the problem of hardware sharing, shows its high practical relevance, as well as a big influence of hardware sharing on the major circuit and system parameters, and its importance for the multi-objective optimization and tradeoff exploitation. It also demonstrates that the state-of-the-art synthesis tools do not sufficiently address this problem and gives several guidelines related to enhancement of the hardware reuse. © 2011 IEEE.

关键词： Multiobjective optimization

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Provenance Query Patterns for Many-Task Scientific Computing 3

Provenance Query Patterns for Many-Task Scientific Computing

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3rd Workshop on the Theory and Practice of Provenance, TaPP 2011

作者： Gadelha, Luiz M.R. Mattoso, Marta Wilde, Michael Foster, Ian Computer and Systems Engineering Program Federal University of Rio de Janeiro Rio de Janeiro Brazil Computation Institute University of Chicago Argonne National Laboratory Chicago United States

Provenance information enable the analysis of large scale many-task computations often specified as scientific workflows. They allow for one to determine how each resulting data set was derived from other data sets and applications. In this work, we survey queries used for exploring provenance information about many-task computations. We present a set of patterns that can be identified in these queries, which is being used as a basis for the design and implementation of a provenance management system for many-task scientific computations, integrated to the Swift parallel scripting system. It has a data model similar to the Open Provenance Model, with extensions that enrich core structural provenance data, represented as consumption and production relationships between applications and data sets, with information about the runtime behavior of each application, and domain-specific information such as the scientific parameters used by applications. © TaPP *** right reserved.

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Provenance management in Swift

Provenance management in Swift

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作者： Gadelha Jr., Luiz M.R. Clifford, Ben Mattoso, Marta Wilde, Michael Foster, Ian Computer and Systems Engineering Program Federal University of Rio de Janeiro Brazil National Laboratory for Scientific Computing Brazil Computation Institute University of Chicago United States Mathematics and Computer Science Division Argonne National Laboratory United States

The Swift parallel scripting language allows for the specification, execution and analysis of large-scale computations in parallel and distributed environments. It incorporates a data model for recording and querying provenance information. In this article we describe these capabilities and evaluate the interoperability with other systems through the use of the Open Provenance Model. We describe Swift's provenance data model and compare it to the Open Provenance Model. We also describe and evaluate activities performed within the Third Provenance Challenge, which consisted of implementing a specific scientific workflow, capturing and recording provenance information of its execution, performing provenance queries, and exchanging provenance information with other systems. Finally, we propose improvements to both the Open Provenance Model and Swift's provenance system. © 2011 Elsevier B.V. All rights reserved.

关键词： Interoperability

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Prediction of porosity in casting junctions using a mathematical model developed through design of experiments

Prediction of porosity in casting junctions using a mathemat...

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39th Annual North American Manufacturing Research Conference, NAMRC39

作者： Mane, Abhay Awad, Mahmoud Orady, Elsayed Knight, James College of Engineering and Computer Science AENG Program University of Michigan-Dearborn Dearborn MI United States Department of Industrial Engineering ALHOSN University Abu Dhabi United Arab Emirates Department of Industrial and Manufacturing Systems Engineering University of Michigan-Dearborn Dearborn MI United States

ISBN: (纸本)9781618390578

Proper design of castings is essential to avoid casting defects that cannot be eliminated by design of tooling and process parameters. Shrinkage porosity is one of the defects which usually occur at casting junctions and cannot be easily eliminated. Currently, designers use rules that were established based on experience and intuition and are not supported by proper experimentation. In this paper an approach to design and optimize design of casting junctions using a database of mathematical models is presented. The mathematical models give relationships between porosity and the junctions' dimensional features. To illustrate this approach, a mathematical model for a V-junction has been developed using Design of Experiments (DoE) and regression analysis techniques. The experimental runs for the study are established using a D-optimality criterion and conducted using MAGMASoft, comprehensive software for casting simulation, for measuring porosity in casting junctions. The simulations carried out in MAGMASoft are validated by comparing its results with experimental results from previous studies. The mathematical model is then developed by applying regression analysis. The results of the model have been validated and found to agree with both the experimental and the validation simulation experiments.

关键词： Regression analysis

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Modularity detection in protein-protein interaction networks

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BMC Research Notes 2011年第1期4卷 1-6页

作者： Narayanan, Tejaswini Gersten, Merril Subramaniam, Shankar Grama, Ananth Department of Electrical and Computer Engineering University of California San Diego United States Graduate Program in Bioinformatics and Systems Biology University of California San Diego United States Department of Bioengineering University of California San Diego United States Department of Computer Science Purdue University West Lafayette IN United States

Background: Many recent studies have investigated modularity in biological networks, and its role in functional and structural characterization of constituent biomolecules. A technique that has shown considerable promise in the domain of modularity detection is the Newman and Girvan (NG) algorithm, which relies on the number of shortest-paths across pairs of vertices in the network traversing a given edge, referred to as the betweenness of that edge. The edge with the highest betweenness is iteratively eliminated from the network, with the betweenness of the remaining edges recalculated in every iteration. This generates a complete dendrogram, from which modules are extracted by applying a quality metric called modularity denoted by Q. This exhaustive computation can be prohibitively expensive for large networks such as Protein-Protein Interaction Networks. In this paper, we present a novel optimization to the modularity detection algorithm, in terms of an efficient termination criterion based on a target edge betweenness value, using which the process of iterative edge removal may be terminated. Results: We validate the robustness of our approach by applying our algorithm on real-world protein-protein interaction networks of Yeast, *** and Drosophila, and demonstrate that our algorithm consistently has significant computational gains in terms of reduced runtime, when compared to the NG algorithm. Furthermore, our algorithm produces modules comparable to those from the NG algorithm, qualitatively and quantitatively. We illustrate this using comparison metrics such as module distribution, module membership cardinality, modularity Q, and Jaccard Similarity Coefficient. Conclusions: We have presented an optimized approach for efficient modularity detection in networks. The intuition driving our approach is the extraction of holistic measures of centrality from graphs, which are representative of inherent modular structure of the underlying network, and the applic

关键词： Biological Network Jaccard Index Input Network High Betweenness Jaccard Similarity Coefficient

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A tool for analysing logics

A tool for analysing logics

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作者： Veloso, Sheila R.M. Veloso, Paulo A.S. Veloso, Paula M. Systems and Computer Engin. Dept. Fac. of Engineering UERJ: State University of Rio de Janeiro Rio de Janeiro RJ Brazil Systems and Computer Engineering Program COPPE UFRJ: Federal University of Rio de Janeiro Rio de Janeiro RJ Brazil Mathematics Dept. ICEx UFMG: Federal University of Minas Gerais Belo Horizonte MG Brazil

We introduce and examine a tool for analysing logics. This algebraic tool, coming from some ideas introduced by J. Piaget, provides condensed information about a logic (with emphasis on the behavior of a unary symbol), as such, it can be employed for analysing and, to some extent, comparing logics. © 2011 Elsevier B.V. All rights reserved.

关键词： computer circuits

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Generating Activity Streams from Events occurring in company-internal IT infrastructures

Generating Activity Streams from Events occurring in company...

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2011 IEEE 13th International Conference on Communication Technology(ICCT 2011)

作者： Eng.S.M.Khaled Reza S.M.Mohsin Reza Masters Program in Computational Engineering (Distributed Systems Engineering) Faculty of Computer Science Dresden University of Technology Dresden Germany Masters Program in Information Technology (Embedded Systems Engineering) Faculty of Computer Science Electrical Engineering and Information Technology University of Stuttgart Germany

In the current era of technology,the Internet and web technologies become the center source of *** to the huge amount of contents,one of the main challenges of modern information technology is aimed at how to reduce and manage information in a structured way with mobilizing users to the similar kind of relevant ***,any intelligent system should be able to understand people's interest about a particular type of information and automatically mobilize him to the similar kind of available information *** idea of high level Activity Streams along with its standardized format can play a vital role to solve this problem in the broader *** paper introduces a novel system called CoASGen (Consolidation and Activity Streams Generator) which is able to automatically generate high level Activity Streams after aggregating and consolidating from different independent systems (*** a software company context:version management system,wikis,bug trackers etc.).It retrieves life time information as heterogeneous web feed by sensing user activities from those independent systems and then it transforms several similar types of atomic activities into high level Activity Streams using semantic technologies along with its specific standardized ***,it shows these high level Activity Streams to the user interface which is able to automatically motivate users to find relevant information easily without either missing any data or losing valuable *** system solves the problem "data silos" by reducing and managing information in a structured way.

关键词： Activity Streams,Atomic Activity,High Level Activity Stream,CoASGen System

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Exploring provenance in high performance scientific computing

Exploring provenance in high performance scientific computin...

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1st Annual 2011 Workshop on High-Performance Computing Meets Databases, HPCDB'11, Co-located with Supercomputing, SC'11

作者： Gadelha Jr., Luiz M.R. Wilde, Michael Mattoso, Marta Foster, Ian Computer and Systems Engineering Program Federal University of Rio de Janeiro Brazil National Laboratory for Scientific Computing Brazil Mathematics and Computer Science Division Argonne National Laboratory United States Computation Institute Argonne National Laboratory University of Chicago United States Department of Computer Science University of Chicago United States

ISBN: (纸本)9781450311571

Large-scale scientific computations are often organized as a composition of many computational tasks linked through data flow. After the completion of a computational scientific experiment, a scientist has to analyze its outcome, for instance, by checking inputs and outputs of computational tasks that are part of the experiment. This analysis can be automated using provenance management systems that describe, for instance, the production and consumption relationships between data artifacts, such as files, and the computational tasks that compose the scientific application. In this article, we explore the relationship between high performance computing and provenance management systems, observing that storing provenance as structured data enriched with information about the runtime behavior of computational tasks in high performance computing environments can enable interesting and useful queries to correlate computational resource usage, scientific parameters, and data set derivation. We briefly describe how provenance of many-task scientific computations specified and coordinated by the Swift parallel scripting system is gathered and queried. © 2011 ACM.

关键词： Information management

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