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An Approach Using Parallel Architecture to Storage DICOM Images in Distributed File System

Journal of Physics: Conference Series 2012年第1期341卷

作者： Tiago S Soares Thiago C Prado M A R Dantas Douglas D J de Macedo Michael A Bauer Informatics and Statistic Department Federal University of Santa Catarina Florianpolis Brazil Post-Graduate Program of Knowledge Engineering and Management Federal University of Santa Catarina Florianpolis Brazil Department of Computer Science University of Western Ontario UWO London Canada

Telemedicine is a very important area in medical field that is expanding daily motivated by many researchers interested in improving medical applications. In Brazil was started in 2005, in the State of Santa Catarina has a developed server called the CyclopsDCMServer, which the purpose to embrace the HDF for the manipulation of medical images (DICOM) using a distributed file system. Since then, many researches were initiated in order to seek better performance. Our approach for this server represents an additional parallel implementation in I/O operations since HDF version 5 has an essential feature for our work which supports parallel I/O, based upon the MPI paradigm. Early experiments using four parallel nodes, provide good performance when compare to the serial HDF implemented in the CyclopsDCMServer.

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A reliable approach for applying DICOM structured reporting in a large-scale telemedicine network

A reliable approach for applying DICOM structured reporting ...

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Annual IEEE Symposium on computer-Based Medical Systems

作者： Cloves Langendorf Barcellos Aldo von Wangenheim Rafael Andrade Post-Graduate Program in Computer Science (PPGCC) UFSC Brazil National Institute of Digital Convergence (INCoD)

The need for procedures and methodologies used in clinical information standardization is continuous, requiring the current telemedicine networks to evolve and adapt by using mature standards and guidelines as the basis for clinical documents transmitted through the network. In this work, we present a different approach for large-scale use of DICOM SR in telemedicine networks using structured vocabularies as its foundation, resulting in a reliable, efficient and data mining ready application applied in a real world telemedicine network. This approach is applied in a large-scale network where 60 physicians report daily an average of 400 reports; resulting in more than 80,000 reports written and stored in the last nine months. We conclude that the use of this approach can reduce eventual syntax or conceptual mistakes by using proper structured vocabularies in addition to DICOM SR.

关键词： DICOM Strontium Medical services Writing Vocabulary Telemedicine Databases

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Simulator improvements to validate the Green Cloud Computing approach

Simulator improvements to validate the Green Cloud Computing...

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Latin American Network Operations and Management Symposium, (LANOMS)

作者： Jorge Werner Guilherme Geronimo Carlos Westphall Fernando Koch Rafael Freitas Network and Management Laboratory Post-Graduate Program in Computer Science Federal University of Santa Catarina Florianopolis Santa Catarina Brazil

Green Cloud Computing aims at a processing infrastructure that combines flexibility, quality of services, and reduced energy utilization. In order to achieve this objective, the management solution must regulate the internal settings to address the pressing issue of data center over-provisioning related to the need to match the peak demand. In this context, we propose an integrated solution for resource management based on organization models of autonomous agent components. This work introduces the system management model, analyzes the system's behavior, describes the operation principles, and presents a use case scenario. To simulate the approach of organization, theory and implementation of migration policies and reallocation changes were made as improvements in the code of CloudSim framework.

关键词： Servers Cloud computing Green products computer architecture Computational modeling Clouds Load modeling

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A Decision Support System for Medium-Sized Emergencies

A Decision Support System for Medium-Sized Emergencies

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computer science Society (SCCC) International Conference Chilean FLAGGED

作者： Andre Engelbrecht Adriana S. Vivacqua Marcos R.S. Borges Alvaro Monares Sergio F. Ochoa Jose A. Pino Post-graduate Program on Informatics (PPGI) Federal University of Rio de Janeiro Rio de Janeiro Rio de Janeiro Brazil Department of Computer Science Universidad de Chile Santiago Chile

The decisions made by the operation commander in emergency situations should be made quickly to save lives. To avoid late or bad decisions, the commander must construct a situational awareness. The irregular arrival flow of information, uncertainty, information overload and lack of persistence are the main factors that hinder this task. To minimize these effects we propose an architecture composed of mobile devices and a decision support system to be used in the command post. The main point in the system design is the cognitive overload. Therefore, heuristics about the usage of the information by experienced commanders were elicited and implemented.

关键词： Decision support systems Decision making Vehicles Mobile handsets Humans Ontologies Availability

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Capturing users' preferences and intentions in a semantic search system

Capturing users' preferences and intentions in a semantic se...

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作者： D'Agostini, Caio Stein Fileto, Renato Post-Graduate Program in Computer Science Federal University of Santa Catarina PO Box 476 Florianópolis SC 88040-900 Brazil

ISBN: (纸本)1891706241

A shared representation of knowledge, such as an ontology, cannot capture the viewpoints and preferences of individual users. Praesto is a semantic search system that keeps track of the the user's preferences from his interactions with the system and uses this information on trying to capture the user's intentions in subsequent searches. The user's preferences are represented as his or her context relative to a shared knowledge base (KB), which is used to describe the contents to be searched for. Praestro uses this contextual information to estimate the probable users' intentions, for disambiguating and semantically expanding keyword based searches, in order to provide results that are relevant for the evolving user's interests.

关键词： Ontology

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CLM-TCP: TCP Congestion Control Mechanism Using Cross Layer for Wireless Mesh Networks

CLM-TCP: TCP Congestion Control Mechanism Using Cross Layer ...

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International Conference on Parallel and Distributed Systems (ICPADS)

作者： Vagner Nascimento Carlos Gomes Waldir Moreira Antonio Abelém Post Graduate Program in Computer Science Federal University of Para Belem Para Brazil

The Transmission Control Protocol - TCP has been widely researched in many different networking technologies such as wireless, optical, satellite, sensor, and wired since it is the most used protocol on the Internet. In Wireless mesh networks, this protocol still has challenges due to its origin and implementations for wired networks. This paper proposes an adaptation on the congestion control mechanism using information from the network layer to improve TCP performance through the vertical calibration across layer technique. The result is the Cross Layer Mesh - Transmission Control Protocol (CLM-TCP). To show the efficiency of the proposal, simulations in the NS-2 were carried out.

关键词： Cross layer design Wireless mesh networks Wireless application protocol Wireless sensor networks Optical sensors Optical control Optical fiber networks Satellites IP networks Calibration

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Improvements in the model for interoperability of intrusion detection responses compatible with the IDWG model

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International Journal of Network Management 2007年第4期17卷 287-294页

作者： Da Silva, Paulo Fernando Westphall, Carlos Becker Network and Management Laboratory Post-Graduate Program in Computer Science Federal University of Santa Catarina Florianópolis Brazil

This paper presents a model for response interoperability between intruder detection systems (IDSs), compatible with the model for alert interoperability developed by the Intrusion Detection Working Group (IDWG). Alterations in IDS IDWG architecture are proposed in order to provide for response interoperability support. The development and testing of the proposed model and its components are also presented. Copyright © 2006 John Wiley & Sons, Ltd.

关键词： Intrusion detection

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Design and Evaluation of a Grid Computing Based Architecture for Integrating Heterogeneous IDSs

Design and Evaluation of a Grid Computing Based Architecture...

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IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference

作者： Paulo F. Silva Carlos B. Westphall Carla M. Westphall Marcos Dias de Assuncao Network and Management Laboratory Post-Graduate Program in Computer Science Federal University of Santa Catarina Florianopolis Brazil Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia

Intrusion detection systems (IDSs) have been substantially improved in recent past. However, network attacks have become more sophisticated and increasingly complex: many of current attacks are coordinated and originated in multiple networks. To detect these attacks, IDSs need to obtain information on network events from multiple networks or administrative domains. This work demonstrates that a Distributed IDS (DIDS) can be composed of existing IDSs, improving the detection of misuses in a multiple network environment. We use a grid middleware for creating a service-based intrusion detection grid. We demonstrate through experimental results that the proposed DIDS allows the integration of heterogeneous existing IDSs and improves the detection of attacks by exploring the synergy between existing IDSs.

关键词： Grid computing computer architecture Intrusion detection Resource management Laboratories computer science Electronic mail Middleware computer network management Engineering management

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A business-oriented perspective for QoS management

A business-oriented perspective for QoS management

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2004 IEEE Workshop on IP Operations and Management Proceedings, IPOM 2004: Self-Measurement and Self-Management of IP Networks and Services

作者： Penna, Manoel Camillo Kaestner, Celso Wandresen, Rafael Romualdo Post Graduate Program in Computer Science Pontifical Catholic University of Parana Curitiba Brazil

ISBN: (纸本)0780388364

Research efforts in Quality of Service (QoS) management have usually addressed the problem under the network infrastructure perspective whereas a business-oriented perspective, named Service Quality Management (SQM), is being considered by industry. This paper point out differences and similarities between two approaches and addresses the main issues arising under SQM perspective. Here, QoS indicators and corresponding service levels are defined to provide a common understanding of service delivery, and a critical issue is to provide an effective way to evaluate them. Two evaluation modes are used: off-line and on-line. Off-line methods compute indicators values at the end of a pre-defined evaluation period, whereas on-line methods do it when a related event occurs. This work proposes an architecture for SQM systems and discusses the mechanisms for both off-line and on-line evaluation modes. ©2004 IEEE.

关键词： Quality of service

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A workflow-based environment to manage software-testing process executions

A workflow-based environment to manage software-testing proc...

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作者： Ruiz, Duncan Dubugras A. Becker, Karin Copstein, Bernardo De Oliveira, Flavio Moreira De Oliveira, Angelina Torres Forgiarini, Gustavo Rossarolla Meneguzzi, Cristiano Rech Carvalho, Rafaela Lisboa Computer Science Post-Graduate Program Faculty of Informatics Pontifical Catholic University of RS Av. Ipiranga 6681 Predio 16 Sala 106-FACIN Porto Alegre - RS Brazil

ISBN: (纸本)972886521X

This work describes a workflow-based environment that manages the execution of software-testing processes. Testing processes require that human and computer resources be handled as dedicated resources, previously scheduled for testing activities, with no overlapping. Two striking features of this environment are: a) the efficient handling of resources by taking into account the capabilities offered by resources required by testing activities, and b) it provides a broader view of all execution steps in a software-testing plan. Hence, it enables a better planning of software-testing process executions, as well as of human and computer resources involved.

关键词： Software testing

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