Carlos Oberdan Rolim | Universidade Federal do Rio Grande do Sul (original) (raw)

Papers by Carlos Oberdan Rolim

Sensors

With the growing number of mobile devices receiving daily notifications, it is necessary to manag... more With the growing number of mobile devices receiving daily notifications, it is necessary to manage the variety of information produced. New smart devices are developed every day with the ability to generate, send, and display messages about their status, data, and information about other devices. Consequently, the number of notifications received by a user is increasing and their tolerance may decrease in a short time. With this, it is necessary to develop a management system and notification controls. In this context, this work proposes a notification and alert management system called PRISER. Its focus is on user profiles and environments, applying data privacy criteria.

Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre ... more Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre rede de sensores (WSN), grids computacionais e dispositivos móveis. Será discutido como o middleware fornece serviços como gerência, comunicação de dados, diretório de serviços, descoberta de recursos e segurança, provendo ao desenvolvedor um conjunto de recursos reutilizáveis e homogêneos. Serão discutidos também problemas inerentes a este cenário e a forma como foi solucionado. Apresentando a validação da descoberta de recursos por parte do middleware. Abstract. In this work, we introduce a middleware to integrate grid computing, wireless sensor networks and mobile devices. We present its features, such as manageability, data communication, services directory, resources discovery and security, providing to developer a set of reused and homogeneous resources; discuss about inherent problems, and; propose solutions. Presenting the validation resource discovery for middleware.

Page 1. E-MEDISYS 2008 2nd International Conference: EMedical Systems October 29-31, 2008 – TUNIS... more Page 1. E-MEDISYS 2008 2nd International Conference: EMedical Systems October 29-31, 2008 – TUNISIA - 1 - Telemedicine with Wireless Sensor Networks Carlos Oberdan Rolim*, Fernando Luiz Koch*, Carlos Becker Westphall* and Sekkaki Abderrahim** ...

An important question in Smart Cities is how to instrument citizens and cities to promote the sen... more An important question in Smart Cities is how to instrument citizens and cities to promote the sensing of urban data about different aspects. In this work, we present a ubiquitous service-oriented architecture for urban sensing called UrboSenti. Our approach differs from other sensing solutions since it uses a service-oriented conceptual model, in the integration of traditional sensors with social networks and in availability of services to assist the development of new sensing applications. Moreover, our model encompass all sensing activities, ranging from the collection of data to generation of reports about events in the city Resumo. Uma importante questão em Cidades Inteligentes é como instrumentalizar as cidades e os cidadãos para promover o sensoriamento de dados urbanos a respeito de diferentes aspectos. Nesse trabalho é apresentada uma arquitetura ubíqua orientada a serviços para o sensoriamento urbano chamada UrboSenti. Ela difere das demais soluções existentes em relação ao seu modelo conceitual orientado a serviços, na integração de sensores tradicionais com redes sociais e na disponibilização de serviços para auxiliar no desenvolvimento de novas aplicações de sensoriamento. Além disso, o modelo proposto envolve todo o ciclo de sensoriamento, indo da coleta de dados à geração de relatórios a respeito de eventos da cidade.

International Journal of High Performance Systems Architecture, Mar 20, 2015

... Dr. Claudio Fernando Resin Geyer and co-advisor Prof. Dr. Jorge Sá Silva, University of Coimb... more ... Dr. Claudio Fernando Resin Geyer and co-advisor Prof. Dr. Jorge Sá Silva, University of Coimbra Portugal. ... Two classical examples in this area are provided in Akogrimo (2008), and Chu and Humphrey (2004), whereas in Litke et al. ...

This article seeks the study of an hospital atmosphere that uses grid computing, for collection a... more This article seeks the study of an hospital atmosphere that uses grid computing, for collection and to make available of the patients' vital data in real time. He intends the creation of a middleware to allow the integration of the data collected through the sensors with the grid, allowing like this a homogenization of the nodes of the grid and an improvement as for the easiness offered to the user. This middleware should possess the minimum existent necessary resources in other middleware, also supporting mobile devices

Opportunistic Networks exploits the possibility of mobile devices to communicate with each other ... more Opportunistic Networks exploits the possibility of mobile devices to communicate with each other in ad-hoc manner. This paradigm uses pair-wise contacts to share and forward content without any prior knowledge about pre-existing infrastructure. Thus, optimize data dissemination among nodes is a par-amount. Current solutions often use some instantaneous contextual information for routing decision that does not consider possible future situation. Our hypoth-esis is that since each node has some sort of contextual information then if we could predict the future values of these parameters we could achieve better rout-ing decisions. In this work, we present early stages of our research towards a predictive routing agent that uses prediction of context and collaboration with other agents for efficient routing of messages to the recipient. We carried out simulations using a simulator environment, achieving positive results.

Due to the nature of ubiquitous systems, nodes (e.g., sensors) are frequently prone to failures. ... more Due to the nature of ubiquitous systems, nodes (e.g., sensors) are frequently prone to failures. Such systems must, therefore, present self-healing capabilities in order to detect failures and make the necessary adjustments to prevent their impact on applications. In such a context, this work proposes a new and flexible unreliable failure detector, denoted as the Impact failure detector (FD), for self-healing system in ubiquitous environments. The output of the Impact FD concerns the confidence in the system as a whole. By expressing the relevance of each node by an impact factor value as well as a margin of acceptable failures of the system, the Impact FD enables the user to tune the failure detection configuration in accordance with the requirements of the application: in some scenarios, the failure of low impact or redundant nodes does not jeopardize the confidence in the system, while the crash of a high impact factor one may seriously affect it. Either a softer or stricter moni...

With the perspective of ubiquitous computing becoming more common form of technology in our every... more With the perspective of ubiquitous computing becoming more common form of technology in our everyday lives, our increasing dependency on these systems will require them to be always available, failure-free, fully operational and safe. They will also enable more activities to be carried out and provide new opportunities for solving problems. In view of the potential offered by ubiquitous computing and the challenges it raises, this work proposes a self-healing architecture to support ubiquitous applications aimed at healthcare The goal is to continuously provide reliable services to meet their requirements despite changes in the environment. We outline the application scenario and proposed architecture, as well as giving a detailed account of its main modules with particular emphasis on the fault detector.

The identification of users in pervasive and ubiquitous environments can be performed using vario... more The identification of users in pervasive and ubiquitous environments can be performed using various devices and techniques, among which the use of wireless sensor networks (WSN), radio frequency identifiers (RFID), Smartphones, Bluetooth, among others. However, it is necessary to implement management techniques and control privacy of these heterogeneous environments. Thus, we performed a study using artificial neural networks in order to perform the processing of information identified only generating an output of information to Percontrol.

Proceedings of the 17th International Conference on Enterprise Information Systems, 2015

ABSTRACT Social urban sensing is a new paradigm which exploits human-carried or vehicle-mounted s... more ABSTRACT Social urban sensing is a new paradigm which exploits human-carried or vehicle-mounted sensors to ubiquitously collect data for large-scale urban sensing. A challenge of such scenario is how to transmit sensed data in situations where the networking infrastructure is intermittent or unavailable. In this context, this paper outlines the early stages of our research which is concerned with a novel engine that uses Opportunistic Networks paradigm to underlie the data transmission of social urban sensing applications. It applies Situation awareness, Neural Networks and Fuzzy Logic for routing and decision-making process. As we know, this is the first paper to use such approaches in Smart Cities area with focus on social sensing application. As well as being original, the preliminary results from our simulations signals the way that further research can be carried out in this area.

Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre ... more Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre rede de sensores (WSN), grids computacionais e dispositivos móveis. também problemas inerentes a este cenário e a forma como foi solucionado. Apresentando a validação da descoberta de recursos por parte do middleware. Abstract. In this work, we introduce a middleware to integrate grid computing, wireless sensor networks and mobile devices. We present its features, such as manageability, data communication, services directory, resources discovery and security, providing to developer a set of reused and homogeneous resources; discuss about inherent problems, and; propose solutions. Presenting the validation resource discovery for middleware.

Proceedings of the ACM International Conference on Computing Frontiers - CF '13, 2013

Opportunistic networks exploits social behavior to build connectivity opportunities. This paradig... more Opportunistic networks exploits social behavior to build connectivity opportunities. This paradigm uses pair-wise contact to share and forward content without any prior knowledge about pre-existing infrastructure. In this context, optimize data dissemination among nodes is a paramount. This paper presents early stages of our research with focus on reasoning and predictions issues to improve data dissemination on opportunistic networks. We intend to explore contextual and social aspects with machine learning techniques in the design of a reasoning and prediction engine for this purpose.

Communications in Computer and Information Science, 2015

Some Wireless Sensor Networks applications can be considered safe critical due to the important i... more Some Wireless Sensor Networks applications can be considered safe critical due to the important impact caused in occurrence of their malfunctioning. Motivated by this issue, a research area in dependability applied to WSN is gaining strength. As highly distributed systems, WSN present a number of issues that have to be handled in order to achieve a dependable behavior. These issues are stressed considering the current sophisticated WSN, composed by static and/or mobile nodes. This paper proposes a review of the main problems and trends in the area of dependability for WSN, aiming to find suitable solutions to the problems faced by emerging WSN composed of static and mobile sensor nodes. Such applicability is analyzed for an application scenario of area surveillance.

Cities are involving towards intelligent dynamic infrastructures that serve citizens with new ser... more Cities are involving towards intelligent dynamic infrastructures that serve citizens with new services to improve their quality of life and to fulfill the criteria of energy efficiency and sustainability. In this context, an important question is how to instrument citizens and cities to promote the sensing of data about different aspects. In this work, we present early stages of our research towards a ubiquitous service-oriented architecture for urban sensing called UrboSenti. Our approach differs from other sensing platforms since it provides a set of services to collect data from several sources and to assist the development of new sensing applications. Moreover, our model encompass all sensing activities, ranging from the collection of data to generation of reports about events in the city.

Sensors

With the growing number of mobile devices receiving daily notifications, it is necessary to manag... more With the growing number of mobile devices receiving daily notifications, it is necessary to manage the variety of information produced. New smart devices are developed every day with the ability to generate, send, and display messages about their status, data, and information about other devices. Consequently, the number of notifications received by a user is increasing and their tolerance may decrease in a short time. With this, it is necessary to develop a management system and notification controls. In this context, this work proposes a notification and alert management system called PRISER. Its focus is on user profiles and environments, applying data privacy criteria.

Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre ... more Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre rede de sensores (WSN), grids computacionais e dispositivos móveis. Será discutido como o middleware fornece serviços como gerência, comunicação de dados, diretório de serviços, descoberta de recursos e segurança, provendo ao desenvolvedor um conjunto de recursos reutilizáveis e homogêneos. Serão discutidos também problemas inerentes a este cenário e a forma como foi solucionado. Apresentando a validação da descoberta de recursos por parte do middleware. Abstract. In this work, we introduce a middleware to integrate grid computing, wireless sensor networks and mobile devices. We present its features, such as manageability, data communication, services directory, resources discovery and security, providing to developer a set of reused and homogeneous resources; discuss about inherent problems, and; propose solutions. Presenting the validation resource discovery for middleware.

Page 1. E-MEDISYS 2008 2nd International Conference: EMedical Systems October 29-31, 2008 – TUNIS... more Page 1. E-MEDISYS 2008 2nd International Conference: EMedical Systems October 29-31, 2008 – TUNISIA - 1 - Telemedicine with Wireless Sensor Networks Carlos Oberdan Rolim*, Fernando Luiz Koch*, Carlos Becker Westphall* and Sekkaki Abderrahim** ...

An important question in Smart Cities is how to instrument citizens and cities to promote the sen... more An important question in Smart Cities is how to instrument citizens and cities to promote the sensing of urban data about different aspects. In this work, we present a ubiquitous service-oriented architecture for urban sensing called UrboSenti. Our approach differs from other sensing solutions since it uses a service-oriented conceptual model, in the integration of traditional sensors with social networks and in availability of services to assist the development of new sensing applications. Moreover, our model encompass all sensing activities, ranging from the collection of data to generation of reports about events in the city Resumo. Uma importante questão em Cidades Inteligentes é como instrumentalizar as cidades e os cidadãos para promover o sensoriamento de dados urbanos a respeito de diferentes aspectos. Nesse trabalho é apresentada uma arquitetura ubíqua orientada a serviços para o sensoriamento urbano chamada UrboSenti. Ela difere das demais soluções existentes em relação ao seu modelo conceitual orientado a serviços, na integração de sensores tradicionais com redes sociais e na disponibilização de serviços para auxiliar no desenvolvimento de novas aplicações de sensoriamento. Além disso, o modelo proposto envolve todo o ciclo de sensoriamento, indo da coleta de dados à geração de relatórios a respeito de eventos da cidade.

International Journal of High Performance Systems Architecture, Mar 20, 2015

... Dr. Claudio Fernando Resin Geyer and co-advisor Prof. Dr. Jorge Sá Silva, University of Coimb... more ... Dr. Claudio Fernando Resin Geyer and co-advisor Prof. Dr. Jorge Sá Silva, University of Coimbra Portugal. ... Two classical examples in this area are provided in Akogrimo (2008), and Chu and Humphrey (2004), whereas in Litke et al. ...

This article seeks the study of an hospital atmosphere that uses grid computing, for collection a... more This article seeks the study of an hospital atmosphere that uses grid computing, for collection and to make available of the patients' vital data in real time. He intends the creation of a middleware to allow the integration of the data collected through the sensors with the grid, allowing like this a homogenization of the nodes of the grid and an improvement as for the easiness offered to the user. This middleware should possess the minimum existent necessary resources in other middleware, also supporting mobile devices

Opportunistic Networks exploits the possibility of mobile devices to communicate with each other ... more Opportunistic Networks exploits the possibility of mobile devices to communicate with each other in ad-hoc manner. This paradigm uses pair-wise contacts to share and forward content without any prior knowledge about pre-existing infrastructure. Thus, optimize data dissemination among nodes is a par-amount. Current solutions often use some instantaneous contextual information for routing decision that does not consider possible future situation. Our hypoth-esis is that since each node has some sort of contextual information then if we could predict the future values of these parameters we could achieve better rout-ing decisions. In this work, we present early stages of our research towards a predictive routing agent that uses prediction of context and collaboration with other agents for efficient routing of messages to the recipient. We carried out simulations using a simulator environment, achieving positive results.

Due to the nature of ubiquitous systems, nodes (e.g., sensors) are frequently prone to failures. ... more Due to the nature of ubiquitous systems, nodes (e.g., sensors) are frequently prone to failures. Such systems must, therefore, present self-healing capabilities in order to detect failures and make the necessary adjustments to prevent their impact on applications. In such a context, this work proposes a new and flexible unreliable failure detector, denoted as the Impact failure detector (FD), for self-healing system in ubiquitous environments. The output of the Impact FD concerns the confidence in the system as a whole. By expressing the relevance of each node by an impact factor value as well as a margin of acceptable failures of the system, the Impact FD enables the user to tune the failure detection configuration in accordance with the requirements of the application: in some scenarios, the failure of low impact or redundant nodes does not jeopardize the confidence in the system, while the crash of a high impact factor one may seriously affect it. Either a softer or stricter moni...

With the perspective of ubiquitous computing becoming more common form of technology in our every... more With the perspective of ubiquitous computing becoming more common form of technology in our everyday lives, our increasing dependency on these systems will require them to be always available, failure-free, fully operational and safe. They will also enable more activities to be carried out and provide new opportunities for solving problems. In view of the potential offered by ubiquitous computing and the challenges it raises, this work proposes a self-healing architecture to support ubiquitous applications aimed at healthcare The goal is to continuously provide reliable services to meet their requirements despite changes in the environment. We outline the application scenario and proposed architecture, as well as giving a detailed account of its main modules with particular emphasis on the fault detector.

The identification of users in pervasive and ubiquitous environments can be performed using vario... more The identification of users in pervasive and ubiquitous environments can be performed using various devices and techniques, among which the use of wireless sensor networks (WSN), radio frequency identifiers (RFID), Smartphones, Bluetooth, among others. However, it is necessary to implement management techniques and control privacy of these heterogeneous environments. Thus, we performed a study using artificial neural networks in order to perform the processing of information identified only generating an output of information to Percontrol.

Proceedings of the 17th International Conference on Enterprise Information Systems, 2015

ABSTRACT Social urban sensing is a new paradigm which exploits human-carried or vehicle-mounted s... more ABSTRACT Social urban sensing is a new paradigm which exploits human-carried or vehicle-mounted sensors to ubiquitously collect data for large-scale urban sensing. A challenge of such scenario is how to transmit sensed data in situations where the networking infrastructure is intermittent or unavailable. In this context, this paper outlines the early stages of our research which is concerned with a novel engine that uses Opportunistic Networks paradigm to underlie the data transmission of social urban sensing applications. It applies Situation awareness, Neural Networks and Fuzzy Logic for routing and decision-making process. As we know, this is the first paper to use such approaches in Smart Cities area with focus on social sensing application. As well as being original, the preliminary results from our simulations signals the way that further research can be carried out in this area.

Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre ... more Resumo. Neste artigo propõe-se a criação de um middleware que ofereça suporte a integração entre rede de sensores (WSN), grids computacionais e dispositivos móveis. também problemas inerentes a este cenário e a forma como foi solucionado. Apresentando a validação da descoberta de recursos por parte do middleware. Abstract. In this work, we introduce a middleware to integrate grid computing, wireless sensor networks and mobile devices. We present its features, such as manageability, data communication, services directory, resources discovery and security, providing to developer a set of reused and homogeneous resources; discuss about inherent problems, and; propose solutions. Presenting the validation resource discovery for middleware.

Proceedings of the ACM International Conference on Computing Frontiers - CF '13, 2013

Opportunistic networks exploits social behavior to build connectivity opportunities. This paradig... more Opportunistic networks exploits social behavior to build connectivity opportunities. This paradigm uses pair-wise contact to share and forward content without any prior knowledge about pre-existing infrastructure. In this context, optimize data dissemination among nodes is a paramount. This paper presents early stages of our research with focus on reasoning and predictions issues to improve data dissemination on opportunistic networks. We intend to explore contextual and social aspects with machine learning techniques in the design of a reasoning and prediction engine for this purpose.

Communications in Computer and Information Science, 2015

Some Wireless Sensor Networks applications can be considered safe critical due to the important i... more Some Wireless Sensor Networks applications can be considered safe critical due to the important impact caused in occurrence of their malfunctioning. Motivated by this issue, a research area in dependability applied to WSN is gaining strength. As highly distributed systems, WSN present a number of issues that have to be handled in order to achieve a dependable behavior. These issues are stressed considering the current sophisticated WSN, composed by static and/or mobile nodes. This paper proposes a review of the main problems and trends in the area of dependability for WSN, aiming to find suitable solutions to the problems faced by emerging WSN composed of static and mobile sensor nodes. Such applicability is analyzed for an application scenario of area surveillance.

Cities are involving towards intelligent dynamic infrastructures that serve citizens with new ser... more Cities are involving towards intelligent dynamic infrastructures that serve citizens with new services to improve their quality of life and to fulfill the criteria of energy efficiency and sustainability. In this context, an important question is how to instrument citizens and cities to promote the sensing of data about different aspects. In this work, we present early stages of our research towards a ubiquitous service-oriented architecture for urban sensing called UrboSenti. Our approach differs from other sensing platforms since it provides a set of services to collect data from several sources and to assist the development of new sensing applications. Moreover, our model encompass all sensing activities, ranging from the collection of data to generation of reports about events in the city.