Papers by Rockenbach Tarouco
— This paper introduces the notion of PoP (Policy of Policies) used to define standard policy rep... more — This paper introduces the notion of PoP (Policy of Policies) used to define standard policy replacement strategies in a policy-based network. We also propose an architecture to support PoP within PDPs (Policy Decision Points originally defined by the IETF). The notion of PoP, and the proposed architecture allow the automation of the policy replacement task currently manually executed by the network administrator based on the network business plan. Keywords: policy-based network management, policy definition, policy of policies, meta-policies, policy replacement automation.
Web Services gateways can be used to include SNMP devices into a Web Services-based management ar... more Web Services gateways can be used to include SNMP devices into a Web Services-based management architecture. This paper presents an evaluation of bandwidth consumption and response time of two different Web Services to SNMP gateway strategies. The evaluation intends to verify the feasibility of using Web Services closer to the network devices management interface. In addition, it has been verified the impact associated with the data compression and encryption of the Web Services communication traffic. The collected results have been then compared with the associated SNMP traffic. Resumo. Gateways Web Services podem ser usados para incluir dispositivos SNMP em uma arquitetura de gerenciamento baseada em Web Services. Neste artigo é apresenta a avaliação de consumo de banda e tempo de resposta de duas estratégias para gateways Web Services para SNMP. A avaliação foi realizada para se verificar a possibilidade de usar Web Services próximos à interface de gerenciamento dos dispositivos de rede. Também foi verificado o impacto da compressão e criptografia dos dados necessários à comunicação com os gateways e os resultados obtidos foram comparados com o tráfego SNMP associado.
This paper introduces a protocol for the atomic deployment of management policies for computer ne... more This paper introduces a protocol for the atomic deployment of management policies for computer networks with quality of services (QoS) support. Atomic protocols are needed when the deployment of a management policy partially works, configuring just a subset of the intended target devices, which is not enough to provide proper QoS for network users. Besides, policy partial deployment leads to the waste of network resources that could be better used. In addition to the protocol definition, this paper presents the protocol implementation in a policy-based network management architecture used to manage differentiated services (DiffServ) networks.
This paper is the result of a research that investigates authoring tools, wich allow the construc... more This paper is the result of a research that investigates authoring tools, wich allow the construction of contents and its packaging for use and reuse in different contexts by different individuals, trying to achieve the pedagogical objectives of a unit of learning, as well as, achieve their students' educational needs. This study was conducted through the experiences of packaging Learning
Lecture Notes in Computer Science, 2006
Abstract. This paper presents a novel protocol to support the atomic deployment of management pol... more Abstract. This paper presents a novel protocol to support the atomic deployment of management policies for networks with quality of service (QoS) support. The necessity of such a protocol comes from the fact that faulty policy deployments lead to situations where the required QoS is ...
Integrated Network Management VIII, 2003
The network management area has some proposals to use XML to encode information models and manage... more The network management area has some proposals to use XML to encode information models and managed object instances. In this paper we present a solution to dynamically create SNMP to XML proxies using a SAX parser and the translation facilities from the libsmi tools. We also present an analysis system that uses the management information provided by the proxies in XML.
QoS and multicast are facilities that several modern applications require from networks. However,... more QoS and multicast are facilities that several modern applications require from networks. However, the management of such facilities is complex and not integrated, when based on traditional management architectures. In this paper we present a policy-based management architecture and system for the integrated management of QoS and multicast-enabled networks. The definition of policies for this architecture is also presented showing how a network administrator can use such policies in order to manage the QoS and multicast facilities. The proposed architecture is based on the IETF approach. However, we discuss how such approach had to be adapted in order to support not only QoS management, but also multicast management, in an integrated fashion. Finally, we also present the implementation of our proposal providing some management example scenarios.
The purpose of this paper is to report the results of a pilot study, conducted in May, 2003, whic... more The purpose of this paper is to report the results of a pilot study, conducted in May, 2003, which aimed at testing a research model inspired in Kost et alii (1999) and the instruments utilized to collect data that will be used in the future in a main study on the effects of graphical representation of time over the comprehension
Psychology, Education and Computer Science, and also can be used as guidelines for the constructi... more Psychology, Education and Computer Science, and also can be used as guidelines for the construction of DLEs specially designed for people with social interaction problems.
Currently, Web Services for network management have been an in- tensive field of investigation. H... more Currently, Web Services for network management have been an in- tensive field of investigation. However, the investigations carried up to do not properly address the issue related to event notifications. The Simple Network Management Protocol, which is the widely deployed and accepted solution, has an interesting but also limited support for event notification through its trap mes- sages. In this
Dynamic domains are domains that need be quickly created, used and discarded. Today, there are no... more Dynamic domains are domains that need be quickly created, used and discarded. Today, there are no facilities available to support dynamic domains in most network management systems. This paper introduces two new languages to deal with dynamic domains. The first language is used to create new domains through the selection of managed objects. The second language, on its turn, is
This article sample that is possible the construction of the knowledge in virtual communities, fr... more This article sample that is possible the construction of the knowledge in virtual communities, from the moment where the students that are part of these communities start to keep interactions that make possible the dialogue. It also approaches the importance of the dialogue in the process of the learning; dialogue based on the studies developed by Paulo Freire and Jean
Resumo: Este trabalho enfoca os agenciamentos desencadeados em sala de aula pela promoção da hete... more Resumo: Este trabalho enfoca os agenciamentos desencadeados em sala de aula pela promoção da heterogeneidade de modos de a ção, produção e referências no plano d e c omposição, de ac ordo com a filosofia de Gilles Deleuze. A interface de encontro do s processos artísticos com a utilização d a tecnologia digital, dos alunos da graduação, partiu sempre da
ABSTRACT This article shows a case study in which the mathematics teacher can create learning obj... more ABSTRACT This article shows a case study in which the mathematics teacher can create learning objects (LO), by simply just having basic computer knowledge. It was taught a training course for teachers about the use of authoring tools to create these objects. In this training, the teachers, besides creating an LO, also answered three questionnaires, and these data were statistically analyzed. We conclude that most mathematics teachers can use and combine learning authoring tools to create LOs according to the proposed methodology.
Resumo: A utilização d e vídeos educacionais no p rocesso d e e nsino e aprendizagem ganhou impor... more Resumo: A utilização d e vídeos educacionais no p rocesso d e e nsino e aprendizagem ganhou importantes recursos com o surgimento d e padrões, como o MPEG-7, que auxiliam descreve-los de forma padronizada, possibilitando a busca e seleção de vídeos ou partes dele. A utilização das descrições MPEG-7, escritas em XML e integradas a um repositório d e materiais
Proceedings Third International Workshop on Policies for Distributed Systems and Networks, 2002
This paper introduces the notion of PoP (Policy of Policies) used to define standard policy repla... more This paper introduces the notion of PoP (Policy of Policies) used to define standard policy replacement strategies in a policy-based network. We also propose an architecture to support PoP within PDPs (Policy Decision Points originally defined by the IETF). The notion of PoP, and the proposed architecture allow the automation of the policy replacement task currently manually executed by the network administrator based on the network business plan.
Managing long distance backbones based on high speed optical networks requires new solutions for ... more Managing long distance backbones based on high speed optical networks requires new solutions for challenging tasks. For instance, operators and users located at different administrative domains must communicate with each other in order to configure and monitor agreed quality of service levels. This paper proposes a novel peer-to-peer (P2P) management architecture for optical networks, focused initially on the new RNP
Este artigo mostra que é possível a construção do conhecimento em comunidades virtuais, a partir ... more Este artigo mostra que é possível a construção do conhecimento em comunidades virtuais, a partir do momento em que os sujeitos que fazem parte dessas comunidades passam a manter interações dialógicas. Aborda também a importância do diálogo no processo da aprendizagem; diálogo, esse, visto sob as perspectivas freireana e piagetiana. Além disso, são analisadas estratégias que permitem conseguir uma melhor interação e uma maior colaboração entre os sujeitos. A observação realizada em cursos a distância, oferecidos em ambientes virtuais de aprendizagem, permitiu verificar que ocorre a construção do conhecimento quando o aluno interage nas comunidades virtuais, utilizando as ferramentas específicas para isso, como chat, fórum, e-mail entre outros. Os resultados encontrados apontam para a necessidade de estratégias de interação dialógicas a serem utilizadas pelos mediadores que atuarão em cursos a distância, a fim de incentivar e estimular os educandos para que realizem formas diversas de interação, com os outros atores do curso, que possibilitem passar de um nível de conhecimento menor para um outro maior.
Resumo: Neste artigo descrevemos um ambiente construtivista de aprendizagem de conceitos matemáti... more Resumo: Neste artigo descrevemos um ambiente construtivista de aprendizagem de conceitos matemáticos e tecnológicos relacionados com o uso de aplicativos matemáticos, listas de discussão, construção de páginas para WEB e resolução de problemas no contexto de modelos de Matemática elementar e desenvolvimento de projetos de aprendizagem.
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Papers by Rockenbach Tarouco