ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE's application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
Traditionally, the evaluation of surgical procedures in virtual reality (VR) simulators has been ... more Traditionally, the evaluation of surgical procedures in virtual reality (VR) simulators has been restricted to their individual technical aspects disregarding the procedures carried out by teams. However, some decision models have been proposed to support the collaborative training evaluation process of surgical teams in collaborative virtual environments. The main objective of this article is to present a collaborative simulator based on VR, named SimCEC , as a potential solution for education, training, and evaluation in basic surgical routines for teams of undergraduate students. The simulator considers both tasks performed individually and those carried in a collaborative manner. The main contribution of this work is to improve the discussion about VR simulators requirements (design and implementation) to provide team training in relevant topics, such as users’ feedback in real time, collaborative training in networks, interdisciplinary integration of curricula, and continuous e...
2016 XVIII Symposium on Virtual and Augmented Reality (SVR), 2016
In recent decades, a greater number of Collaborative Virtual Environments (CVEs) have been develo... more In recent decades, a greater number of Collaborative Virtual Environments (CVEs) have been developed and sought for collaborative training of medical personnel in VR. Observing the needs identified in the literature, a multidisciplinary team developed a collaborative simulator for education and assessment of student groups in basic surgical routines, called SimCEC. The system was developed according to a strict methodology of design. Considering important needs with regard to storage guarantee, consistency and availability of the CVE, SimCEC was recently added by a cloud data distribution architecture for managing multiple virtual rooms for training of student teams, enabling collaboration among different areas of health. This paper discusses the theoretical and practical aspects of such tool, as well as its advantages and the new possibilities offered for surgical education area.
A Realidade Virtual (RV) permite aos seus usuários experimentarem uma sensação de estarem imersos... more A Realidade Virtual (RV) permite aos seus usuários experimentarem uma sensação de estarem imersos em cenários 3D sintéticos gerados por computação gráfica. Os chamados Ambientes Virtuais (AVs) de RV, quando aplicados à educação médica, possibilitam: treino repetitivo e o desenvolvimento de habilidades psicomotoras em procedimentos cirúrgicos sem o comprometimento de pacientes reais. Os simuladores cirúrgicos que apresentam Pacientes Virtuais (PVs), isto é, que apresentam sensibilidade fisiológica às intervenções e decisões médicas tomadas ao longo do treinamento, são mais requisitados pela possibilidade de variação de casos clínicos gerados, aumentando portanto o grau de realismo. Este trabalho tem por objetivo principal, discutir importantes aspectos sobre a modelagem do comportamento hemodinâmico de um PV cirúrgico, especificamente das variáveis de Pressão Arterial Sistólica (PAS) e Diastólica (PAD) em momentos distintos da indução anestésica. Como objetivo específico têm-se a pro...
2012 14th Symposium on Virtual and Augmented Reality, 2012
ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE's application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
2013 XV Symposium on Virtual and Augmented Reality, 2013
ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning and training skills on a given task. One CVE's possibility to the health area is the simulation of medical procedures in which a group of remote users can train and interact simultaneously. Health area has been benefited from the advent of Virtual Reality (VR) especially in education area, where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR's feature is the ability to monitor user's actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE's architecture for supporting training and assessment of team skills, during surgery simulation.
Este trabalho tem como objetivo apresentar um estudo a respeito do uso da colaboração e manipulaç... more Este trabalho tem como objetivo apresentar um estudo a respeito do uso da colaboração e manipulação cooperativa de objetos em Ambientes Virtuais Colaborativos (AVCs), analisando as diferentes técnicas e arquiteturas de colaboração já existentes. Pretende-se com o estudo propor ...
Collaborative Virtual Environments (CVEs) are Virtual Reality (VR) systems and can simulate medic... more Collaborative Virtual Environments (CVEs) are Virtual Reality (VR) systems and can simulate medical procedures such as surgeries performed by a group of remote users which can interact with one another through the simulation in real-time, with the aid of a network such as the Internet.Therefore, it is important to note that research on CVE-specific networking issues allows us to better understand the requirements for real-time applications. This paper discloses design and implementation issues of a peer-to-peer multicast architecture on the collaborative module of theCyberMed VR framework, aiming at providing better network scalability, as well as it shows as results, some developed applications as validation. Finally, we compared the performance of the newly implemented peer-to-peer multicast architecture with the peer-to-peer unicast previously existent with simulated models designed with OPNET Network Modeler and R statistical software. As result of our experiments, the null hypo...
Virtual reality-based training simulators, with collaborative capabilities, are known to improve ... more Virtual reality-based training simulators, with collaborative capabilities, are known to improve the way users interact with one another while learning or improving skills on a given medical procedure. Performance evaluation of Collaborative Haptic Virtual Environments (CHVE) allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. This work discloses new performance evaluation results for the collaborative module of the CyberMed VR framework.
Traditionally, the evaluation of surgical procedures in VR simulators have been restricted to the... more Traditionally, the evaluation of surgical procedures in VR simulators have been restricted to their individual technical aspects, and disregarded the procedures carried out by teams. However, some decision models have been proposed in order to be incorporated and support the collaborative training evaluation process of surgical teams in Collaborative Virtual Environments (CVEs). This paper aims to discuss some possibilities and advantages of using the CVEs for the training process and assessment of surgical teams as well as presenting the steps of planning and development of a new simulator with these features, called SimCEC. The discussion is held in a computational modeling and implementation optic.
Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one anot... more Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning and training skills on a given task. One CVE’s possibility to the health area is the simulation of medical procedures in which a group of remote users can train and interact simultaneously. Health area has been benefited from the advent of Virtual Reality (VR) especially in education area,
where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR’s feature is the ability to monitor user’s actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE’s architecture for supporting training and assessment of team skills, during surgery simulation.
Performance evaluation on Distributed Haptic
Virtual Environments (DHVEs) became important to
und... more Performance evaluation on Distributed Haptic Virtual Environments (DHVEs) became important to understand the new Internet requirements for supporting multisensorial and real-time collaborative applications. This paper presents the results of simulation and performance analysis of the CyberMed framework. The main goal of this experiment is to evaluate the real conditions of CyberMed when executed over a non-dedicated hybrid network, like the Internet, comparing its results with other similar works found in the literature.
Traditionally, the evaluation of medical procedures
in VR simulators have been restricted to tec... more Traditionally, the evaluation of medical procedures
in VR simulators have been restricted to technical and
individual aspects, and procedures performed by teams are
normally disregarded. However, some computer architectures
have been proposed in order to facilitate the evaluation process
of surgical teams supported by Collaborative Virtual
Environments (CVEs) training. This paper aims to discuss
some possibilities and advantages of CVEs for teams
assessment process as well as provide an architecture for
collaborative assessment, covering its essential requirements.
The discussion is based on the analysis of this evaluation
architecture used in a collaborative simulator named SimCEC
- Collaborative Simulator for Surgery Education.
Collaborative Virtual Environments (CVEs) can
improve the way remote users interact with one anot... more Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE’s application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE's application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
Traditionally, the evaluation of surgical procedures in virtual reality (VR) simulators has been ... more Traditionally, the evaluation of surgical procedures in virtual reality (VR) simulators has been restricted to their individual technical aspects disregarding the procedures carried out by teams. However, some decision models have been proposed to support the collaborative training evaluation process of surgical teams in collaborative virtual environments. The main objective of this article is to present a collaborative simulator based on VR, named SimCEC , as a potential solution for education, training, and evaluation in basic surgical routines for teams of undergraduate students. The simulator considers both tasks performed individually and those carried in a collaborative manner. The main contribution of this work is to improve the discussion about VR simulators requirements (design and implementation) to provide team training in relevant topics, such as users’ feedback in real time, collaborative training in networks, interdisciplinary integration of curricula, and continuous e...
2016 XVIII Symposium on Virtual and Augmented Reality (SVR), 2016
In recent decades, a greater number of Collaborative Virtual Environments (CVEs) have been develo... more In recent decades, a greater number of Collaborative Virtual Environments (CVEs) have been developed and sought for collaborative training of medical personnel in VR. Observing the needs identified in the literature, a multidisciplinary team developed a collaborative simulator for education and assessment of student groups in basic surgical routines, called SimCEC. The system was developed according to a strict methodology of design. Considering important needs with regard to storage guarantee, consistency and availability of the CVE, SimCEC was recently added by a cloud data distribution architecture for managing multiple virtual rooms for training of student teams, enabling collaboration among different areas of health. This paper discusses the theoretical and practical aspects of such tool, as well as its advantages and the new possibilities offered for surgical education area.
A Realidade Virtual (RV) permite aos seus usuários experimentarem uma sensação de estarem imersos... more A Realidade Virtual (RV) permite aos seus usuários experimentarem uma sensação de estarem imersos em cenários 3D sintéticos gerados por computação gráfica. Os chamados Ambientes Virtuais (AVs) de RV, quando aplicados à educação médica, possibilitam: treino repetitivo e o desenvolvimento de habilidades psicomotoras em procedimentos cirúrgicos sem o comprometimento de pacientes reais. Os simuladores cirúrgicos que apresentam Pacientes Virtuais (PVs), isto é, que apresentam sensibilidade fisiológica às intervenções e decisões médicas tomadas ao longo do treinamento, são mais requisitados pela possibilidade de variação de casos clínicos gerados, aumentando portanto o grau de realismo. Este trabalho tem por objetivo principal, discutir importantes aspectos sobre a modelagem do comportamento hemodinâmico de um PV cirúrgico, especificamente das variáveis de Pressão Arterial Sistólica (PAS) e Diastólica (PAD) em momentos distintos da indução anestésica. Como objetivo específico têm-se a pro...
2012 14th Symposium on Virtual and Augmented Reality, 2012
ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE's application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
2013 XV Symposium on Virtual and Augmented Reality, 2013
ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with... more ABSTRACT Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning and training skills on a given task. One CVE's possibility to the health area is the simulation of medical procedures in which a group of remote users can train and interact simultaneously. Health area has been benefited from the advent of Virtual Reality (VR) especially in education area, where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR's feature is the ability to monitor user's actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE's architecture for supporting training and assessment of team skills, during surgery simulation.
Este trabalho tem como objetivo apresentar um estudo a respeito do uso da colaboração e manipulaç... more Este trabalho tem como objetivo apresentar um estudo a respeito do uso da colaboração e manipulação cooperativa de objetos em Ambientes Virtuais Colaborativos (AVCs), analisando as diferentes técnicas e arquiteturas de colaboração já existentes. Pretende-se com o estudo propor ...
Collaborative Virtual Environments (CVEs) are Virtual Reality (VR) systems and can simulate medic... more Collaborative Virtual Environments (CVEs) are Virtual Reality (VR) systems and can simulate medical procedures such as surgeries performed by a group of remote users which can interact with one another through the simulation in real-time, with the aid of a network such as the Internet.Therefore, it is important to note that research on CVE-specific networking issues allows us to better understand the requirements for real-time applications. This paper discloses design and implementation issues of a peer-to-peer multicast architecture on the collaborative module of theCyberMed VR framework, aiming at providing better network scalability, as well as it shows as results, some developed applications as validation. Finally, we compared the performance of the newly implemented peer-to-peer multicast architecture with the peer-to-peer unicast previously existent with simulated models designed with OPNET Network Modeler and R statistical software. As result of our experiments, the null hypo...
Virtual reality-based training simulators, with collaborative capabilities, are known to improve ... more Virtual reality-based training simulators, with collaborative capabilities, are known to improve the way users interact with one another while learning or improving skills on a given medical procedure. Performance evaluation of Collaborative Haptic Virtual Environments (CHVE) allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. This work discloses new performance evaluation results for the collaborative module of the CyberMed VR framework.
Traditionally, the evaluation of surgical procedures in VR simulators have been restricted to the... more Traditionally, the evaluation of surgical procedures in VR simulators have been restricted to their individual technical aspects, and disregarded the procedures carried out by teams. However, some decision models have been proposed in order to be incorporated and support the collaborative training evaluation process of surgical teams in Collaborative Virtual Environments (CVEs). This paper aims to discuss some possibilities and advantages of using the CVEs for the training process and assessment of surgical teams as well as presenting the steps of planning and development of a new simulator with these features, called SimCEC. The discussion is held in a computational modeling and implementation optic.
Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one anot... more Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning and training skills on a given task. One CVE’s possibility to the health area is the simulation of medical procedures in which a group of remote users can train and interact simultaneously. Health area has been benefited from the advent of Virtual Reality (VR) especially in education area,
where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR’s feature is the ability to monitor user’s actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE’s architecture for supporting training and assessment of team skills, during surgery simulation.
Performance evaluation on Distributed Haptic
Virtual Environments (DHVEs) became important to
und... more Performance evaluation on Distributed Haptic Virtual Environments (DHVEs) became important to understand the new Internet requirements for supporting multisensorial and real-time collaborative applications. This paper presents the results of simulation and performance analysis of the CyberMed framework. The main goal of this experiment is to evaluate the real conditions of CyberMed when executed over a non-dedicated hybrid network, like the Internet, comparing its results with other similar works found in the literature.
Traditionally, the evaluation of medical procedures
in VR simulators have been restricted to tec... more Traditionally, the evaluation of medical procedures
in VR simulators have been restricted to technical and
individual aspects, and procedures performed by teams are
normally disregarded. However, some computer architectures
have been proposed in order to facilitate the evaluation process
of surgical teams supported by Collaborative Virtual
Environments (CVEs) training. This paper aims to discuss
some possibilities and advantages of CVEs for teams
assessment process as well as provide an architecture for
collaborative assessment, covering its essential requirements.
The discussion is based on the analysis of this evaluation
architecture used in a collaborative simulator named SimCEC
- Collaborative Simulator for Surgery Education.
Collaborative Virtual Environments (CVEs) can
improve the way remote users interact with one anot... more Collaborative Virtual Environments (CVEs) can improve the way remote users interact with one another while learning or training skills on a given task. One CVE’s application is the possibility of simulating medical procedures in which a group of remote users can train and interact simultaneously. It is important that networking issues and performance evaluation of CVEs allows us to understand how such systems can work in the Internet, as well as the requirements for multisensorial and real-time data. Thus, this paper discloses implementation issues of a peer-to-peer multicast network architecture on the collaborative module of the CyberMed VR framework. The multicast protocol is known to provide better scalability and decrease the use of bandwidth on CVEs, allowing better Quality of Experience (QoE). Finally it presents the results of a performance evaluation experiment.
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Papers by Paulo Paiva
where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR’s feature is the ability to monitor user’s actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE’s architecture for supporting training and assessment of team skills, during surgery simulation.
Virtual Environments (DHVEs) became important to
understand the new Internet requirements for supporting
multisensorial and real-time collaborative applications. This
paper presents the results of simulation and performance
analysis of the CyberMed framework. The main goal of this
experiment is to evaluate the real conditions of CyberMed
when executed over a non-dedicated hybrid network, like the
Internet, comparing its results with other similar works found
in the literature.
in VR simulators have been restricted to technical and
individual aspects, and procedures performed by teams are
normally disregarded. However, some computer architectures
have been proposed in order to facilitate the evaluation process
of surgical teams supported by Collaborative Virtual
Environments (CVEs) training. This paper aims to discuss
some possibilities and advantages of CVEs for teams
assessment process as well as provide an architecture for
collaborative assessment, covering its essential requirements.
The discussion is based on the analysis of this evaluation
architecture used in a collaborative simulator named SimCEC
- Collaborative Simulator for Surgery Education.
improve the way remote users interact with one another while
learning or training skills on a given task. One CVE’s
application is the possibility of simulating medical procedures
in which a group of remote users can train and interact
simultaneously. It is important that networking issues and
performance evaluation of CVEs allows us to understand how
such systems can work in the Internet, as well as the
requirements for multisensorial and real-time data. Thus, this
paper discloses implementation issues of a peer-to-peer
multicast network architecture on the collaborative module of
the CyberMed VR framework. The multicast protocol is
known to provide better scalability and decrease the use of
bandwidth on CVEs, allowing better Quality of Experience
(QoE). Finally it presents the results of a performance
evaluation experiment.
where these systems present some advantages over traditional teaching methods such as: cost reduction for training, reducing the use of guinea pigs and anatomical specimens in laboratory practices as well the use of interactive teaching approaches. Another VR’s feature is the ability to monitor user’s actions for assessing training performance. Thus, statistical models are used in order to check whether a group performed the procedure correctly or not. The goal is to allow the formation of teams and the development of individual skills to work together. This work proposes and discusses one CVE’s architecture for supporting training and assessment of team skills, during surgery simulation.
Virtual Environments (DHVEs) became important to
understand the new Internet requirements for supporting
multisensorial and real-time collaborative applications. This
paper presents the results of simulation and performance
analysis of the CyberMed framework. The main goal of this
experiment is to evaluate the real conditions of CyberMed
when executed over a non-dedicated hybrid network, like the
Internet, comparing its results with other similar works found
in the literature.
in VR simulators have been restricted to technical and
individual aspects, and procedures performed by teams are
normally disregarded. However, some computer architectures
have been proposed in order to facilitate the evaluation process
of surgical teams supported by Collaborative Virtual
Environments (CVEs) training. This paper aims to discuss
some possibilities and advantages of CVEs for teams
assessment process as well as provide an architecture for
collaborative assessment, covering its essential requirements.
The discussion is based on the analysis of this evaluation
architecture used in a collaborative simulator named SimCEC
- Collaborative Simulator for Surgery Education.
improve the way remote users interact with one another while
learning or training skills on a given task. One CVE’s
application is the possibility of simulating medical procedures
in which a group of remote users can train and interact
simultaneously. It is important that networking issues and
performance evaluation of CVEs allows us to understand how
such systems can work in the Internet, as well as the
requirements for multisensorial and real-time data. Thus, this
paper discloses implementation issues of a peer-to-peer
multicast network architecture on the collaborative module of
the CyberMed VR framework. The multicast protocol is
known to provide better scalability and decrease the use of
bandwidth on CVEs, allowing better Quality of Experience
(QoE). Finally it presents the results of a performance
evaluation experiment.