Pub Date : 1900-01-01DOI: 10.1299/TRANSJSME.18-00074
Yoshihiro Sejima, Yutaka Ishii, Tomio Watanabe
Shadows play an important role in the effects of three-dimension and the enhancement of reality in virtual space. On the other hand, addition of color change in human interaction and communication is effective for enhancing expressions such as affects and interactions. Therefore, by changing the color of avatar’s shadows based on the interaction, it is expected to activate and enhance an avatar-mediated interaction and communication. In this study, focusing on the effects of avatar-shadow’s color, we develop an embodied communication system which expresses the change of avatarshadow color based on an interaction-activated communication model. The model estimates activation levels of embodied communication based on speech input, and the color of avatar-shadow is changed on the basis of the estimated values. A communication experiment is performed with 12 pairs of participants to evaluate the system. The results of the sensory evaluation demonstrate that the color expressions of avatar-shadow are effective for visualizing embodied interaction and communication.
{"title":"An embodied communication system with avatar-shadow’s color expressions based on an interaction-activated communication model in voice communication","authors":"Yoshihiro Sejima, Yutaka Ishii, Tomio Watanabe","doi":"10.1299/TRANSJSME.18-00074","DOIUrl":"https://doi.org/10.1299/TRANSJSME.18-00074","url":null,"abstract":"Shadows play an important role in the effects of three-dimension and the enhancement of reality in virtual space. On the other hand, addition of color change in human interaction and communication is effective for enhancing expressions such as affects and interactions. Therefore, by changing the color of avatar’s shadows based on the interaction, it is expected to activate and enhance an avatar-mediated interaction and communication. In this study, focusing on the effects of avatar-shadow’s color, we develop an embodied communication system which expresses the change of avatarshadow color based on an interaction-activated communication model. The model estimates activation levels of embodied communication based on speech input, and the color of avatar-shadow is changed on the basis of the estimated values. A communication experiment is performed with 12 pairs of participants to evaluate the system. The results of the sensory evaluation demonstrate that the color expressions of avatar-shadow are effective for visualizing embodied interaction and communication.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123769667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.19-00047
Ryuta Futagami, Ryuki Tsuboi, H. Mouri, Keisuke Kazama
The characteristic scenario of the Hiyari-Hatto event (i.e., a near-miss incident) wherein a driver is making a right turn is extracted from the Near-Miss Incident Database created by the Smart Mobility Research Center of the Tokyo University of Agriculture and Technology. It is confirmed that in this scenario, there exists a human error: the driver did not notice the pedestrian although the pedestrian is within the driver's field of view. Closer observation of the driver's eye movements reveals that the driver's line of sight is fixed once the driver starts making a turn. Using a novel and unprecedented measurement method, the time at which the driver recognizes the pedestrian can be pinpointed. This method is tested through the driving simulation experiment at an intersection with traffic lights, and the results confirm that there is a high possibility that the driver can miss the pedestrian after the driver starts making a turn.
{"title":"Factor analysis of pedestrian accidents based on driver’s eye movement and the time that drivers attract pedestrian at right turn in an intersection with traffic lights","authors":"Ryuta Futagami, Ryuki Tsuboi, H. Mouri, Keisuke Kazama","doi":"10.1299/transjsme.19-00047","DOIUrl":"https://doi.org/10.1299/transjsme.19-00047","url":null,"abstract":"The characteristic scenario of the Hiyari-Hatto event (i.e., a near-miss incident) wherein a driver is making a right turn is extracted from the Near-Miss Incident Database created by the Smart Mobility Research Center of the Tokyo University of Agriculture and Technology. It is confirmed that in this scenario, there exists a human error: the driver did not notice the pedestrian although the pedestrian is within the driver's field of view. Closer observation of the driver's eye movements reveals that the driver's line of sight is fixed once the driver starts making a turn. Using a novel and unprecedented measurement method, the time at which the driver recognizes the pedestrian can be pinpointed. This method is tested through the driving simulation experiment at an intersection with traffic lights, and the results confirm that there is a high possibility that the driver can miss the pedestrian after the driver starts making a turn.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.20-00026
K. Kawano, D. Iba, K. Uriu, H. Noda, H. Inoue, I. Moriwaki
In a hobbing process, many factors bring pitch, profile, and helix deviations to hobbed gears, and it is generally difficult to identify which factors cause the deviations. Therefore, a system that allows causal factors to be determined is required especially in the after-sales service of the hobbing machine manufactures. In the present study, a hobbing-machine-diagnosis system is being developed. Artificial intelligence will be employed in the system to easily determine the cause of deviations that occur in hobbed gears. The development of the system requires a lot of learning data for artificial intelligence. The data should be obtained in various conditions. However, collecting data from real cutting is almost impossible because of cost and time, so that hobbing simulation was carried out. The hobbing simulation has already been developed by many researchers. But those simulations are not enough for manufacturers of hobbing machines to evaluate problems in the machines. In addition, the conventional tooth profile/helix deviations diagrams are not appropriate for images used in artificial-intelligence systems, because they include redundant data. In the present paper, therefore, a network graph representing the correlation between every two teeth were discussed to examine whether the graph can be used as data for artificial-intelligence systems. As a result, an image of the network graph could be suitable for the system and could enable its data size to be reduced.
{"title":"Hobbing-Machine-Diagnosis system with artificial intelligence (Learning-data collection through hobbing simulation and their compression with network representation)","authors":"K. Kawano, D. Iba, K. Uriu, H. Noda, H. Inoue, I. Moriwaki","doi":"10.1299/transjsme.20-00026","DOIUrl":"https://doi.org/10.1299/transjsme.20-00026","url":null,"abstract":"In a hobbing process, many factors bring pitch, profile, and helix deviations to hobbed gears, and it is generally difficult to identify which factors cause the deviations. Therefore, a system that allows causal factors to be determined is required especially in the after-sales service of the hobbing machine manufactures. In the present study, a hobbing-machine-diagnosis system is being developed. Artificial intelligence will be employed in the system to easily determine the cause of deviations that occur in hobbed gears. The development of the system requires a lot of learning data for artificial intelligence. The data should be obtained in various conditions. However, collecting data from real cutting is almost impossible because of cost and time, so that hobbing simulation was carried out. The hobbing simulation has already been developed by many researchers. But those simulations are not enough for manufacturers of hobbing machines to evaluate problems in the machines. In addition, the conventional tooth profile/helix deviations diagrams are not appropriate for images used in artificial-intelligence systems, because they include redundant data. In the present paper, therefore, a network graph representing the correlation between every two teeth were discussed to examine whether the graph can be used as data for artificial-intelligence systems. As a result, an image of the network graph could be suitable for the system and could enable its data size to be reduced.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126612611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/TRANSJSME.20-00365
K. Sakamoto, Keita Udaka, Withun Hemsuwan, Tsutomu Takahashi
It is known that the longitudinal vortex alternately and periodically forms diagonally backward of the upstream cylinder of the cruciform system consisted of the upstream cylinder and the downstream strip-plate and causes the strong periodic lift force on the upstream cylinder. We have had a new concept to form a longitudinal vortex steadily at a fixed position, in where the gap between the upstream cylinder and the strip-plate, and it generates a steady lift force on the upstream cylinder. A new wind turbine, which has a circular cylinder blade and is driven by the longitudinal vortex, has been designed by this concept. In this study, the flow-visualization by the smoke-wind tunnel confirms the generation of the longitudinal vortex that was predicted by the numerical analysis. The cross-sectional size of the vortex depends on the diameter of the circular cylinder blade and increasing the number of blades does not affect its size strongly. The steady lift force acting on the circular cylinder blade was measured and the relationship with the relative attack angle which is determined by the mainstream flow velocity and the moving velocity of the cylinder blade in crossflow direction was examined. At a small gap between the circular cylinder and the strip-plate, the fluid force acts to reduce the move. When the normalized gap by the cylinder diameter is larger than 0.35, the fluid force causes to accelerate the cylinder faster in the small relative attack angle region. The performance characteristics of the cylinder blade wind turbine were evaluated and they show the similar characteristics to the drag type wind turbine.
{"title":"Development of circular cylinder blade wind turbine driven by longitudinal vortex","authors":"K. Sakamoto, Keita Udaka, Withun Hemsuwan, Tsutomu Takahashi","doi":"10.1299/TRANSJSME.20-00365","DOIUrl":"https://doi.org/10.1299/TRANSJSME.20-00365","url":null,"abstract":"It is known that the longitudinal vortex alternately and periodically forms diagonally backward of the upstream cylinder of the cruciform system consisted of the upstream cylinder and the downstream strip-plate and causes the strong periodic lift force on the upstream cylinder. We have had a new concept to form a longitudinal vortex steadily at a fixed position, in where the gap between the upstream cylinder and the strip-plate, and it generates a steady lift force on the upstream cylinder. A new wind turbine, which has a circular cylinder blade and is driven by the longitudinal vortex, has been designed by this concept. In this study, the flow-visualization by the smoke-wind tunnel confirms the generation of the longitudinal vortex that was predicted by the numerical analysis. The cross-sectional size of the vortex depends on the diameter of the circular cylinder blade and increasing the number of blades does not affect its size strongly. The steady lift force acting on the circular cylinder blade was measured and the relationship with the relative attack angle which is determined by the mainstream flow velocity and the moving velocity of the cylinder blade in crossflow direction was examined. At a small gap between the circular cylinder and the strip-plate, the fluid force acts to reduce the move. When the normalized gap by the cylinder diameter is larger than 0.35, the fluid force causes to accelerate the cylinder faster in the small relative attack angle region. The performance characteristics of the cylinder blade wind turbine were evaluated and they show the similar characteristics to the drag type wind turbine.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114940820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.19-00242
Shoya Okuda, M. Yonezawa
Abstract This study describes a simulation-based estimation procedure of the structural failure probability using an “all quadrants sampling method” newly proposed, in which a sample called as a real sample is generated in an arbitrary quadrant of the basic variable space and then the coordinates of the real sample point is transformed into those of pseudo sample points over all of other quadrants by applying the previously proposed “inter-quadrant relational expression.” That is, once a real sample is generated in an arbitrary quadrant, and then pseudo samples are determined in all other quadrants concurrently. All of real and pseudo samples thus determined are used for the simulation to estimate structural failure probabilities. Numerical examples of various simulation methods combined with the proposed “all quadrants sampling method,” that is, “all quadrant sampling Monte Carlo simulation,” “all quadrant sampling directional simulation,” etc. are presented showing that the proposed method is effective for shortening simulation time.
{"title":"A study of structural reliability analysis based on simulation using all quadrants sampling method","authors":"Shoya Okuda, M. Yonezawa","doi":"10.1299/transjsme.19-00242","DOIUrl":"https://doi.org/10.1299/transjsme.19-00242","url":null,"abstract":"Abstract This study describes a simulation-based estimation procedure of the structural failure probability using an “all quadrants sampling method” newly proposed, in which a sample called as a real sample is generated in an arbitrary quadrant of the basic variable space and then the coordinates of the real sample point is transformed into those of pseudo sample points over all of other quadrants by applying the previously proposed “inter-quadrant relational expression.” That is, once a real sample is generated in an arbitrary quadrant, and then pseudo samples are determined in all other quadrants concurrently. All of real and pseudo samples thus determined are used for the simulation to estimate structural failure probabilities. Numerical examples of various simulation methods combined with the proposed “all quadrants sampling method,” that is, “all quadrant sampling Monte Carlo simulation,” “all quadrant sampling directional simulation,” etc. are presented showing that the proposed method is effective for shortening simulation time.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115110455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/TRANSJSME.19-00099
S. Noguchi, K. Oguni
Differential form is an alternative mathematical form to describe the field variables and the operators in electromagnetism. From the viewpoint of differential forms, discretization of electromagnetic field is divided into two steps, i) discretization of the exterior derivative operator (Maxwell’s equations), and ii) discretization of the Hodge star operator (constitutive equations). The first step, the discrete form of the Maxwell’s equations based on differential forms has been obtained by other researchers. In contrast, the discrete Hodge star operators (discrete constitutive equations) have not been obtained so far. In the previous studies, unsigned diagonal discrete Hodge star operators are defined using the unsigned area and length for circumcenter dual meshes, however, it does not lead to correct solution of partial differential equations in the general Delaunay meshes. In this paper, we propose a definition of the signed diagonal discrete Hodge star using the signed area and length operator for circumcenter dual meshes. Also, based on this definition, we propose a simple practical calculation method for the signed discrete Hodge star operators. The result of convergence experiment indicates that the signed diagonal Hodge star operators produce the correct numerical solution for the general Delaunay meshes. Therefore, this definition and calculation method for the signed discrete Hodge star operator provides us with the explicit dynamics formulation for finite element analysis of electromagnetic field.
{"title":"The computational algorithm and numerical analysis of the signed diagonal Hodge star operator","authors":"S. Noguchi, K. Oguni","doi":"10.1299/TRANSJSME.19-00099","DOIUrl":"https://doi.org/10.1299/TRANSJSME.19-00099","url":null,"abstract":"Differential form is an alternative mathematical form to describe the field variables and the operators in electromagnetism. From the viewpoint of differential forms, discretization of electromagnetic field is divided into two steps, i) discretization of the exterior derivative operator (Maxwell’s equations), and ii) discretization of the Hodge star operator (constitutive equations). The first step, the discrete form of the Maxwell’s equations based on differential forms has been obtained by other researchers. In contrast, the discrete Hodge star operators (discrete constitutive equations) have not been obtained so far. In the previous studies, unsigned diagonal discrete Hodge star operators are defined using the unsigned area and length for circumcenter dual meshes, however, it does not lead to correct solution of partial differential equations in the general Delaunay meshes. In this paper, we propose a definition of the signed diagonal discrete Hodge star using the signed area and length operator for circumcenter dual meshes. Also, based on this definition, we propose a simple practical calculation method for the signed discrete Hodge star operators. The result of convergence experiment indicates that the signed diagonal Hodge star operators produce the correct numerical solution for the general Delaunay meshes. Therefore, this definition and calculation method for the signed discrete Hodge star operator provides us with the explicit dynamics formulation for finite element analysis of electromagnetic field.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115537040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.23-00028
T. Inoue, Kento Hosonuma, Jumpei Kamemura, Richa Hu
{"title":"Fingertip force estimation method of a human-like 3DOF robotic finger capable of fast tapping motion","authors":"T. Inoue, Kento Hosonuma, Jumpei Kamemura, Richa Hu","doi":"10.1299/transjsme.23-00028","DOIUrl":"https://doi.org/10.1299/transjsme.23-00028","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115583320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Autonomous damage detection system for railway axle journal bearings","authors":"Shogo Mamada, Tatsuya Ohta, Masashi Miyamoto, Yoshiaki Okamura","doi":"10.1299/transjsme.21-00124","DOIUrl":"https://doi.org/10.1299/transjsme.21-00124","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122302332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.21-00331
Yuichi Matsumura, S. Yoshikawa, Hiroki Hayata
{"title":"Classification into modal clusters based on the modal contribution analysis of a subsystem","authors":"Yuichi Matsumura, S. Yoshikawa, Hiroki Hayata","doi":"10.1299/transjsme.21-00331","DOIUrl":"https://doi.org/10.1299/transjsme.21-00331","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122516164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.22-00088
M. Okada, T. Koike
{"title":"Design of disturbance reduction control for periodic motion based on error analysis using sensitivity","authors":"M. Okada, T. Koike","doi":"10.1299/transjsme.22-00088","DOIUrl":"https://doi.org/10.1299/transjsme.22-00088","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122560896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：