O perator-training programs for nuclear power plants (NPPs) must take into account high safety re... more O perator-training programs for nuclear power plants (NPPs) must take into account high safety requirements. These programs must effi ciently train workers to manage both normal and abnormal operational conditions and to respond correctly to abnormal conditions through established procedures. The "Nuclear Power Plant Operation" sidebar provides an overview of NPPs and their operational challenges.
Some macular pathology produces degeneration, which causes a perception loss in specific areas of... more Some macular pathology produces degeneration, which causes a perception loss in specific areas of the visual field. In this case, people visualize “blind spots” that hide part of the images captured by the impaired eye. The goal of this paper is to present an image distortion system that explores the Virtual Reality technology potential. To implement it we developed a system that is able to obtain the data generated by the visual field exam, and decode it. A camera captured the real images and the Convex Hull algorithm and Isoperimetric Mapping were used to identify the spots limits generating a divergent distortion in the images situated inside of the blind spot. The modified images can be visualized in a Virtual Reality head mounted display with eye tracking. This system offers opportunities to people with this visual problem to get a general perception of the covered area, reducing the visual loss.
Use of VRML in Collaborative Simulations for the Petroleum Industry
This paper shows the application of the Virtual Reality Modeling Language (VRML) in petroleum ind... more This paper shows the application of the Virtual Reality Modeling Language (VRML) in petroleum industry simulations. The research already accomplished by GRVa/LAMCE (Applied Virtual Reality Group of the Computational Methods Laboratory in Engineering) is shown, ratifying the utilization as an important tool in several areas where Web utilization is available. Also VR concepts, advantages and applicability, besides a set of solutions/applications already developed specifically for the petroleum industry in a collaborative environment are shown
This work reports results obtained with the use of a game engine as a tool to create and to navig... more This work reports results obtained with the use of a game engine as a tool to create and to navigate in virtual environments, to perform simulations and training of workers in risky areas, for safety purposes. The game engine used can be used for non-commercial and educational purposes, and its source code is available for users. Thus, the engine can be modified and adapted for the modeling and simulation of any environment, including the development of new functionalities. A case study is shown, which has the purpose of supporting dose assessment in nuclear plants, for optimization of operational routines in these areas. The implemented modifications are explained, and simulations' results are shown.
This study was designed to verify the evidence of validity, through: 1) literature review about u... more This study was designed to verify the evidence of validity, through: 1) literature review about ushiro-ukemi pedagogical progression. 2) An expert performed the movement and it was recorded to develop the animation. 3) Finally, an evaluation of 3D character animations processes by other experts’ opinions. 13 experts have evaluated three affirmatives through the Likert scale, and answered one question, also in ordinal scale, about the quality of the animation. The calculated medians for the first, second and third affirmatives were 5, 5 and 5 (fully agree), but, only for the 3rd affirmative about sitting ushiro-ukemi, the median was 4 (agree). The percentage of answers that scored higher than agree varied from 84,6 to 100%. The median of the 3D character animation was very good (4) and the percentage of acceptance was 100% (≥ good). The found definitional evidence of validity for these animations ensured their application in a learning material.
This paper presents the methodological approach of the oil spill monitoring system that is being ... more This paper presents the methodological approach of the oil spill monitoring system that is being put into operation by the National Petroleum Agency (NPA) in Brazil. The methodology is based on integrated analysis of multi-sensor data which includes satellites products, such as, GOES and AVHRR Sea Surface Temperature (SST), SeaWiFs chlorophyll concentration, QuikScat near sea surface wind field, GOES and AVHRR convective rain areas, and Synthetic Aperture RADAR (SAR) data from RADARSAT-1 satellite. The methodology is implemented by means of a system composed by four subsystems called, data reception (SAR, GOES, NOAA and QuikScat), Integrator, hydrodynamic model and database. The methodology was applied to the accidental oil spill caused by PETROBRAS oil rig P-36. A RADARSAT-1 image was acquired during accident period at 21:07 (GMT) on 22nd of March 2001 and used. The results are presented and discussed.
O perator-training programs for nuclear power plants (NPPs) must take into account high safety re... more O perator-training programs for nuclear power plants (NPPs) must take into account high safety requirements. These programs must effi ciently train workers to manage both normal and abnormal operational conditions and to respond correctly to abnormal conditions through established procedures. The "Nuclear Power Plant Operation" sidebar provides an overview of NPPs and their operational challenges.
Some macular pathology produces degeneration, which causes a perception loss in specific areas of... more Some macular pathology produces degeneration, which causes a perception loss in specific areas of the visual field. In this case, people visualize “blind spots” that hide part of the images captured by the impaired eye. The goal of this paper is to present an image distortion system that explores the Virtual Reality technology potential. To implement it we developed a system that is able to obtain the data generated by the visual field exam, and decode it. A camera captured the real images and the Convex Hull algorithm and Isoperimetric Mapping were used to identify the spots limits generating a divergent distortion in the images situated inside of the blind spot. The modified images can be visualized in a Virtual Reality head mounted display with eye tracking. This system offers opportunities to people with this visual problem to get a general perception of the covered area, reducing the visual loss.
Use of VRML in Collaborative Simulations for the Petroleum Industry
This paper shows the application of the Virtual Reality Modeling Language (VRML) in petroleum ind... more This paper shows the application of the Virtual Reality Modeling Language (VRML) in petroleum industry simulations. The research already accomplished by GRVa/LAMCE (Applied Virtual Reality Group of the Computational Methods Laboratory in Engineering) is shown, ratifying the utilization as an important tool in several areas where Web utilization is available. Also VR concepts, advantages and applicability, besides a set of solutions/applications already developed specifically for the petroleum industry in a collaborative environment are shown
This work reports results obtained with the use of a game engine as a tool to create and to navig... more This work reports results obtained with the use of a game engine as a tool to create and to navigate in virtual environments, to perform simulations and training of workers in risky areas, for safety purposes. The game engine used can be used for non-commercial and educational purposes, and its source code is available for users. Thus, the engine can be modified and adapted for the modeling and simulation of any environment, including the development of new functionalities. A case study is shown, which has the purpose of supporting dose assessment in nuclear plants, for optimization of operational routines in these areas. The implemented modifications are explained, and simulations' results are shown.
This study was designed to verify the evidence of validity, through: 1) literature review about u... more This study was designed to verify the evidence of validity, through: 1) literature review about ushiro-ukemi pedagogical progression. 2) An expert performed the movement and it was recorded to develop the animation. 3) Finally, an evaluation of 3D character animations processes by other experts’ opinions. 13 experts have evaluated three affirmatives through the Likert scale, and answered one question, also in ordinal scale, about the quality of the animation. The calculated medians for the first, second and third affirmatives were 5, 5 and 5 (fully agree), but, only for the 3rd affirmative about sitting ushiro-ukemi, the median was 4 (agree). The percentage of answers that scored higher than agree varied from 84,6 to 100%. The median of the 3D character animation was very good (4) and the percentage of acceptance was 100% (≥ good). The found definitional evidence of validity for these animations ensured their application in a learning material.
This paper presents the methodological approach of the oil spill monitoring system that is being ... more This paper presents the methodological approach of the oil spill monitoring system that is being put into operation by the National Petroleum Agency (NPA) in Brazil. The methodology is based on integrated analysis of multi-sensor data which includes satellites products, such as, GOES and AVHRR Sea Surface Temperature (SST), SeaWiFs chlorophyll concentration, QuikScat near sea surface wind field, GOES and AVHRR convective rain areas, and Synthetic Aperture RADAR (SAR) data from RADARSAT-1 satellite. The methodology is implemented by means of a system composed by four subsystems called, data reception (SAR, GOES, NOAA and QuikScat), Integrator, hydrodynamic model and database. The methodology was applied to the accidental oil spill caused by PETROBRAS oil rig P-36. A RADARSAT-1 image was acquired during accident period at 21:07 (GMT) on 22nd of March 2001 and used. The results are presented and discussed.
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Papers by Gerson Cunha