Virtual Globes such as Google Earth TM, revolutionize the way scientists conduct their research and the way the general public use geospatial – related data and information. Improvement in the processing power and st...Virtual Globes such as Google Earth TM, revolutionize the way scientists conduct their research and the way the general public use geospatial – related data and information. Improvement in the processing power and storage capacities of computers, along with the increased Internet accessibility and connectivity, has supported the usage of Virtual Globes technologies. Even more, software releases of freely downloadable Virtual Globes, such as Google Earth and NASA World Wind, has sparked an enormous public interest and increased people’s awareness of spatial sciences.In this study, the Virtual Globes (VG) revolution is discussed and a client - server Graphical User Interface (GUI) application is presented. The developed application enables Google Earth TM Application Program Interface and activates spatial analysis, through enhanced JavaScripts and Visual Basic script codes. The main scope was to present the methodology followed during geological modeling along with the application capabilities when handling with data derived from digitized geological maps and field measurements.展开更多
The scene-rendering mechanism based on binocular vision is one of the key techniques for the VR globe to achieve immersion-type visualization of global 3D scenes.However,this special rendering mechanism also requires ...The scene-rendering mechanism based on binocular vision is one of the key techniques for the VR globe to achieve immersion-type visualization of global 3D scenes.However,this special rendering mechanism also requires that the 3D scene is continuously drawn twice within one frame,which significantly affects the rendering efficiency of VR globes.Therefore,we propose a binocular parallel rendering method.This method first improves the current rendering process of VR globes by assigning the rendering tasks for the left and right camera of VR to be processed on different CPU cores,thereby achieving parallel rendering of binocular scenes.Second,due to the problem of inconsistent resolution of binocular scenes caused by different viewpoints for the left and right cameras,we propose a resolution synchronize algorithm.this algorithm conducts realtime synchronization on the resolution of scene in the rendering process and thus avoids the problem of erroneous binocular stereo matching.Finally,we validate the effectiveness of the method in this paper through experiments.The results of experiments indicate that while the method in this paper can ensure the consistency of binocular scene resolution,it can decrease the frame time of VR globes by approximately 27%on average.展开更多
The combination of virtual reality(VR)and virtual globes–VR globes–enables users to not only view virtual scenes in an immersive manner at any location on Earth but also directly interact with multi-scale spatial da...The combination of virtual reality(VR)and virtual globes–VR globes–enables users to not only view virtual scenes in an immersive manner at any location on Earth but also directly interact with multi-scale spatial data using natural behaviors.It is an important direction for the future development of 3D GIS and geovisualization.However,current VR navigation are primarily based on small real spaces.For virtual globes,which are 3D multi-scale globe environment,the realization of VR navigation in the multi-scale virtual globe space within a limited real space is the first problem that needs to be addressed.A multi-scale VR navigation method that consists of two algorithms is proposed in this study.The first algorithm maps the real space to the virtual globe space and connects the VR user with the VR viewpoint.The second algorithm is an octree structure-based viewpoint correction algorithm that is proposed to correct the location of the moving VR viewpoint in real time.The proposed method is validated by experimentation.The experimental results indicate that the proposed method enables a VR user to interactively view the 3D multi-scale globe environment and lays a foundation for human–computer interaction in VR globes.展开更多
The newborn infant presented with severe proptosis. Data on clinical history, presentation, photos, radiological imaging, and laboratory results were presented. A literature review was conducted for the case and relev...The newborn infant presented with severe proptosis. Data on clinical history, presentation, photos, radiological imaging, and laboratory results were presented. A literature review was conducted for the case and relevant treatment modalities. The surgical technique and the outcome were also discussed. The mass was present since birth in a full term neonate, causing complete globe dislocation of the left eye. Imaging showed a large cystic retro-bulbar mass completely occupying the orbital cavity and causing anterior dislocation of the left globe. Surgical excision of the tumor was carried out with globe preservation and Histopathology examination confirmed the diagnosis of optic nerve glioma. This was an atypical presentation of an optic nerve glioma causing globe dislocation in a neonate. The resection of such a large orbital tumor made globe preservation possible and resulted in an excellent cosmetic outcome. .展开更多
Virtual globes(VGs)allow Internet users to view geographic data of heterogeneous quality created by other users.This article presents a new approach for collecting and visualizing information about the perceived quali...Virtual globes(VGs)allow Internet users to view geographic data of heterogeneous quality created by other users.This article presents a new approach for collecting and visualizing information about the perceived quality of 3D data in VGs.It aims atimproving users’awareness of the qualityof 3D objects.Instead of relying onthe existing metadata or on formal accuracy assessments that are often impossible in practice,we propose a crowd-sourced quality recommender system based on the five-star visualization method successful in other types of Web applications.Four alternative five-star visualizations were implemented in a Google Earth-based prototype and tested through a formal user evaluation.These tests helped identifying the most effective method for a 3D environment.Results indicate that while most websites use a visualization approach that shows a‘number of stars’,this method was the least preferred by participants.Instead,participants ranked the‘number within a star’method highest as it allowed reducing the visual clutter in urban settings,suggesting that 3D environments such as VGs require different designapproachesthan2Dornon-geographicapplications.Resultsalsoconfirmed that expert and non-expert users in geographic data share similar preferences for the most and least preferred visualization methods.展开更多
One of the problems in virtual globes technologies is the real-time representation of vegetal species.In forest or garden representations,the low detailed plants produce a lack of realism.Efficient techniques are requ...One of the problems in virtual globes technologies is the real-time representation of vegetal species.In forest or garden representations,the low detailed plants produce a lack of realism.Efficient techniques are required to achieve accurate interactive visualisation due to the great number of polygons the vegetal species have.This article presents a multi-resolution model based on a geometric representation of vegetal species that allows the application to perform the progressive transmission of the model,that is,the transmission of a simple representation followed by successive refinements of it.It has a hardware-oriented design in order to obtain interactive frame rates.The geometric data of the objects are stored in the graphics processing unit and,moreover,the change from one approximation to another is obtained by performing mathematical calcula-tions in this graphics hardware.The multi-resolution model presented here enables instancing:as many vegetal species as desired can be rendered with different levels of detail,while all of them are accessing the same geometric data.This model has been used to build a real-time representation of a not imaginary scenario.展开更多
Massive volumes of global geospatial information are being collected by newly designed acquisition devices and generated by various geospatial applications.This poses a critical challenge to efficiently organize and e...Massive volumes of global geospatial information are being collected by newly designed acquisition devices and generated by various geospatial applications.This poses a critical challenge to efficiently organize and effectively integrate global multi-source geospatial information.This paper introduces a global seamless data model for the organization of huge multi-source,multi-resolution and multi-temporal geospatial data.Based on this data model,the management of the global multi-resolution pyramid is discussed in detail.To integrate geospatial data and processing functions from various GIS systems,a service-oriented framework is presented through the technology of Virtual Globe.Finally,a Virtual Globe system,GeoGlobe,is developed and illustrated.展开更多
The starting point of this paper is the idea that a comprehensive understanding of the earth and its systems calls for consideration of bygone views of the world.Creating facsimiles of antique globes in the form of di...The starting point of this paper is the idea that a comprehensive understanding of the earth and its systems calls for consideration of bygone views of the world.Creating facsimiles of antique globes in the form of digital globes provides a new opportunity to make such bygone world views accessible to a wide scientific audience.However,up to now,little practical experience in applying digital technology on globes has been made.Considering these attempts by thorough synopsis,this article deduces a comprehensive approach on virtual representations of antique globes that can be described by the superordinate concept of virtual representation.This concept comprises facilities of data acquisition of the original globe,ways of visualising the digitised globe and its final cartographic preparation.Applications that arise from this procedure are exemplified through both virtual hyperglobes and tactile hyperglobes.New findings on a 16th century earth globe are encouraging results of the presented virtual representation approach,which may offer a sustainable visualisation platform of interdisciplinary research.展开更多
Inulin is a prebiotic dietary fiber that plays an integral role in producing functional dairy products with improved health benefits. Therefore, the objectives of this study are as follows: extract and purify inulin f...Inulin is a prebiotic dietary fiber that plays an integral role in producing functional dairy products with improved health benefits. Therefore, the objectives of this study are as follows: extract and purify inulin from chicory roots and globe artichoke roots;evaluate the physicochemical, functional properties and functional groups of the purified inulin;determine the functional properties of chicory roots inulin-maltodextrin and globe artichoke roots inulin-maltodextrin and compare it with that of the commercial inulin;examine the impact of various inulin on physiochemical, microstructural, textural, sensory characteristics and as prebiotic dietary fiber on probiotic bacteria’s viability of stirred bio-yogurt. The characteristics of the microstructure were investigated by scanning electron microscopy and, Fourier transforms infrared spectroscopy to detect the functional group. The resulting inulin exhibited a high yield and purity along with enhanced functional properties. Stirred bio-yogurt fortified with chicory roots inulin or globe artichoke roots inulin showed enhanced physicochemical, microstructural, microbiological, and overall sensorial acceptability followed by chicory roots inulin-maltodextrin or globe artichoke roots inulin-maltodextrin and the commercial inulin as compared to the control. Stirred bio-yogurt samples can offer various health benefits and wide applications as supplement of prebiotic dietary fiber in dairy industry.展开更多
Needs for real-time interactive visualization of 3D Tiles for massive 3D content on the web-based virtual globe is rapidly increasing, and to achieve this goal, 3D Tiles needs to be correctly geo-referenced to other g...Needs for real-time interactive visualization of 3D Tiles for massive 3D content on the web-based virtual globe is rapidly increasing, and to achieve this goal, 3D Tiles needs to be correctly geo-referenced to other geospatial data on a web-based virtual globe. It is possible to generate 3D Tiles from different kinds of spatial data through various software tools. However, due to various factors the 3D Tile datasets are often poorly or not at all geo-referenced. To tackle this issue, we propose a new 3D WebGIS framework that facilitates dynamic geo-referencing 3D Tiles on the CesiumJS virtual globe.展开更多
During his state visits to Kazakhstan and Indonesia in 2013,Chinese President Xi Jinping put forward the proposal of building the Silk Road Economic Belt and the 21st-century Maritime Silk Road,which became known as t...During his state visits to Kazakhstan and Indonesia in 2013,Chinese President Xi Jinping put forward the proposal of building the Silk Road Economic Belt and the 21st-century Maritime Silk Road,which became known as the Belt and Road Initiative(BRI).展开更多
文摘Virtual Globes such as Google Earth TM, revolutionize the way scientists conduct their research and the way the general public use geospatial – related data and information. Improvement in the processing power and storage capacities of computers, along with the increased Internet accessibility and connectivity, has supported the usage of Virtual Globes technologies. Even more, software releases of freely downloadable Virtual Globes, such as Google Earth and NASA World Wind, has sparked an enormous public interest and increased people’s awareness of spatial sciences.In this study, the Virtual Globes (VG) revolution is discussed and a client - server Graphical User Interface (GUI) application is presented. The developed application enables Google Earth TM Application Program Interface and activates spatial analysis, through enhanced JavaScripts and Visual Basic script codes. The main scope was to present the methodology followed during geological modeling along with the application capabilities when handling with data derived from digitized geological maps and field measurements.
基金The Nature Science Foundation Innovation Group Project of Hubei Province,China[grant number 2016CFA003].
文摘The scene-rendering mechanism based on binocular vision is one of the key techniques for the VR globe to achieve immersion-type visualization of global 3D scenes.However,this special rendering mechanism also requires that the 3D scene is continuously drawn twice within one frame,which significantly affects the rendering efficiency of VR globes.Therefore,we propose a binocular parallel rendering method.This method first improves the current rendering process of VR globes by assigning the rendering tasks for the left and right camera of VR to be processed on different CPU cores,thereby achieving parallel rendering of binocular scenes.Second,due to the problem of inconsistent resolution of binocular scenes caused by different viewpoints for the left and right cameras,we propose a resolution synchronize algorithm.this algorithm conducts realtime synchronization on the resolution of scene in the rendering process and thus avoids the problem of erroneous binocular stereo matching.Finally,we validate the effectiveness of the method in this paper through experiments.The results of experiments indicate that while the method in this paper can ensure the consistency of binocular scene resolution,it can decrease the frame time of VR globes by approximately 27%on average.
基金This work was supported by National Key R&D Program of China:[grant number 2017YFB0503703]The Nature Science Foundation Innovation Group Project of Hubei Province,China:[grant number 2016CFA003].
文摘The combination of virtual reality(VR)and virtual globes–VR globes–enables users to not only view virtual scenes in an immersive manner at any location on Earth but also directly interact with multi-scale spatial data using natural behaviors.It is an important direction for the future development of 3D GIS and geovisualization.However,current VR navigation are primarily based on small real spaces.For virtual globes,which are 3D multi-scale globe environment,the realization of VR navigation in the multi-scale virtual globe space within a limited real space is the first problem that needs to be addressed.A multi-scale VR navigation method that consists of two algorithms is proposed in this study.The first algorithm maps the real space to the virtual globe space and connects the VR user with the VR viewpoint.The second algorithm is an octree structure-based viewpoint correction algorithm that is proposed to correct the location of the moving VR viewpoint in real time.The proposed method is validated by experimentation.The experimental results indicate that the proposed method enables a VR user to interactively view the 3D multi-scale globe environment and lays a foundation for human–computer interaction in VR globes.
文摘The newborn infant presented with severe proptosis. Data on clinical history, presentation, photos, radiological imaging, and laboratory results were presented. A literature review was conducted for the case and relevant treatment modalities. The surgical technique and the outcome were also discussed. The mass was present since birth in a full term neonate, causing complete globe dislocation of the left eye. Imaging showed a large cystic retro-bulbar mass completely occupying the orbital cavity and causing anterior dislocation of the left globe. Surgical excision of the tumor was carried out with globe preservation and Histopathology examination confirmed the diagnosis of optic nerve glioma. This was an atypical presentation of an optic nerve glioma causing globe dislocation in a neonate. The resection of such a large orbital tumor made globe preservation possible and resulted in an excellent cosmetic outcome. .
文摘Virtual globes(VGs)allow Internet users to view geographic data of heterogeneous quality created by other users.This article presents a new approach for collecting and visualizing information about the perceived quality of 3D data in VGs.It aims atimproving users’awareness of the qualityof 3D objects.Instead of relying onthe existing metadata or on formal accuracy assessments that are often impossible in practice,we propose a crowd-sourced quality recommender system based on the five-star visualization method successful in other types of Web applications.Four alternative five-star visualizations were implemented in a Google Earth-based prototype and tested through a formal user evaluation.These tests helped identifying the most effective method for a 3D environment.Results indicate that while most websites use a visualization approach that shows a‘number of stars’,this method was the least preferred by participants.Instead,participants ranked the‘number within a star’method highest as it allowed reducing the visual clutter in urban settings,suggesting that 3D environments such as VGs require different designapproachesthan2Dornon-geographicapplications.Resultsalsoconfirmed that expert and non-expert users in geographic data share similar preferences for the most and least preferred visualization methods.
基金This work was supported by the Spanish Ministry of Science and Technology(Project TIN2010-21089-C03-03)Feder Funds and Generalitat Valenciana(Project PROMETEO/2010/028).
文摘One of the problems in virtual globes technologies is the real-time representation of vegetal species.In forest or garden representations,the low detailed plants produce a lack of realism.Efficient techniques are required to achieve accurate interactive visualisation due to the great number of polygons the vegetal species have.This article presents a multi-resolution model based on a geometric representation of vegetal species that allows the application to perform the progressive transmission of the model,that is,the transmission of a simple representation followed by successive refinements of it.It has a hardware-oriented design in order to obtain interactive frame rates.The geometric data of the objects are stored in the graphics processing unit and,moreover,the change from one approximation to another is obtained by performing mathematical calcula-tions in this graphics hardware.The multi-resolution model presented here enables instancing:as many vegetal species as desired can be rendered with different levels of detail,while all of them are accessing the same geometric data.This model has been used to build a real-time representation of a not imaginary scenario.
基金supported by the Natural Science Foundation of China (Grant No.40801163)the Innovation Research Group of NSFC (Grant No.40721001)the National Basic Research Program of China ("973" Program)(Grant No.2006CB701304)
文摘Massive volumes of global geospatial information are being collected by newly designed acquisition devices and generated by various geospatial applications.This poses a critical challenge to efficiently organize and effectively integrate global multi-source geospatial information.This paper introduces a global seamless data model for the organization of huge multi-source,multi-resolution and multi-temporal geospatial data.Based on this data model,the management of the global multi-resolution pyramid is discussed in detail.To integrate geospatial data and processing functions from various GIS systems,a service-oriented framework is presented through the technology of Virtual Globe.Finally,a Virtual Globe system,GeoGlobe,is developed and illustrated.
文摘The starting point of this paper is the idea that a comprehensive understanding of the earth and its systems calls for consideration of bygone views of the world.Creating facsimiles of antique globes in the form of digital globes provides a new opportunity to make such bygone world views accessible to a wide scientific audience.However,up to now,little practical experience in applying digital technology on globes has been made.Considering these attempts by thorough synopsis,this article deduces a comprehensive approach on virtual representations of antique globes that can be described by the superordinate concept of virtual representation.This concept comprises facilities of data acquisition of the original globe,ways of visualising the digitised globe and its final cartographic preparation.Applications that arise from this procedure are exemplified through both virtual hyperglobes and tactile hyperglobes.New findings on a 16th century earth globe are encouraging results of the presented virtual representation approach,which may offer a sustainable visualisation platform of interdisciplinary research.
文摘Inulin is a prebiotic dietary fiber that plays an integral role in producing functional dairy products with improved health benefits. Therefore, the objectives of this study are as follows: extract and purify inulin from chicory roots and globe artichoke roots;evaluate the physicochemical, functional properties and functional groups of the purified inulin;determine the functional properties of chicory roots inulin-maltodextrin and globe artichoke roots inulin-maltodextrin and compare it with that of the commercial inulin;examine the impact of various inulin on physiochemical, microstructural, textural, sensory characteristics and as prebiotic dietary fiber on probiotic bacteria’s viability of stirred bio-yogurt. The characteristics of the microstructure were investigated by scanning electron microscopy and, Fourier transforms infrared spectroscopy to detect the functional group. The resulting inulin exhibited a high yield and purity along with enhanced functional properties. Stirred bio-yogurt fortified with chicory roots inulin or globe artichoke roots inulin showed enhanced physicochemical, microstructural, microbiological, and overall sensorial acceptability followed by chicory roots inulin-maltodextrin or globe artichoke roots inulin-maltodextrin and the commercial inulin as compared to the control. Stirred bio-yogurt samples can offer various health benefits and wide applications as supplement of prebiotic dietary fiber in dairy industry.
文摘Needs for real-time interactive visualization of 3D Tiles for massive 3D content on the web-based virtual globe is rapidly increasing, and to achieve this goal, 3D Tiles needs to be correctly geo-referenced to other geospatial data on a web-based virtual globe. It is possible to generate 3D Tiles from different kinds of spatial data through various software tools. However, due to various factors the 3D Tile datasets are often poorly or not at all geo-referenced. To tackle this issue, we propose a new 3D WebGIS framework that facilitates dynamic geo-referencing 3D Tiles on the CesiumJS virtual globe.
文摘During his state visits to Kazakhstan and Indonesia in 2013,Chinese President Xi Jinping put forward the proposal of building the Silk Road Economic Belt and the 21st-century Maritime Silk Road,which became known as the Belt and Road Initiative(BRI).
