Virtual-Reality graph visualization based on Fruchterman-Reingold using Unity and SteamVR

2021 ◽  
pp. 147387162110603
Author(s):  
Gerd Kortemeyer
Keyword(s):  
Virtual Reality ◽  
Directed Graphs ◽  
Dynamic Visualization ◽  
Graph Visualization ◽  
Weighted Graphs ◽  
Virtual Reality System ◽  
Newtonian Physics ◽  
Dynamic Extrusion ◽  
Relationship Of ◽  
The Relationship

The paper describes a method for the immersive, dynamic visualization of undirected, weighted graphs. Using the Fruchterman-Reingold method, force-directed graphs are drawn in a Virtual-Reality system. The user can walk through the data, as well as move vertices using controllers, while the network display rearranges in realtime according to Newtonian physics. In addition to the physics behind the employed method, the paper explains the most pertinent computational mechanisms for its implementation, using Unity, SteamVR, and a Virtual-Reality system such as HTC Vive (the source package is made available for download). It was found that the method allows for intuitive exploration of graphs with on the order of [Formula: see text] vertices, and that dynamic extrusion of vertices and realtime readjustment of the network structure allows for developing an intuitive understanding of the relationship of a vertex to the remainder of the network. Based on this observation, possible future developments are suggested.

Virtual Reality from the Standpoint of Complexity Science

2021 ◽  
Vol 30 (3) ◽  
pp. 244-260
Author(s):  
Helena Knyazeva ◽  
Keyword(s):  
Virtual Reality ◽  
Modern Science ◽  
The Past ◽  
Extended Approach ◽  
Human Creativity ◽  
The Future ◽  
Latent Potential ◽  
Relationship Of ◽  
The Relationship

An extended approach to the comprehension of virtual reality is developed in the article. Virtual reality is understood not only as a logically possible or cybernetically constructed reality but also as continuous turbulence of potencies of the complex natural and social world we live in, the wandering of complex systems and organizations over a field of possibilities, such a realization of forms and structures in which many formations remain in latent, potential forms, and are in the permanent process of making and multiplying a spectrum of possibilities, lead to the growth of the evolutionary tree of paths of development. It is shown that such an understanding of virtual reality corresponds to concepts and notions developed in the modern science of complexity. The most significant concepts are considered, such as the nonlinearity of time, the relationship of space and time, the uncertainty of the past and the openness of the future, the choice and construction of the future at the moments of passing the bifurcation points. Some cultural and historical prototypes of these modern ideas of virtual reality are given. It is substantiated that the vision of virtual reality being developed today can play the role of a heuristic tool for understanding the functioning and stimulation of human creativity.

scholarly journals Redressing the Ocularcentric Culture of architectural design: A Phenomenological and Participatory Approach in VR

2021 ◽  
Author(s):  
Elisaveta Boulatova ◽  
Vincent Hui
Keyword(s):  
Virtual Reality ◽  
Architectural Design ◽  
New Technology ◽  
Virtual Prototyping ◽  
Participatory Approach ◽  
Design Stage ◽  
Digital Space ◽  
Architectural Representation ◽  
Relationship Of ◽  
The Relationship

In the development of architectural representation, the image has become a metonym of architectural experience. This productive tension is maintained by the expectation of fragmented representation to identify and reproduce the experiential and phenomenological dimensions perceived in the physical experience with architecture. Returning to the investigation of representation and perception exemplifies that each new technology introduces a new scale of extension in both design capability and opportunity for feedback. The degree of immersivity introduced by virtual reality technologies elicits several scales of experience. This thesis uses virtual prototyping in the design stage to elicit a product that is not a reflection of intention, but a result of something discovered, evaluated and experienced in immersion prior to realization. An increase in receptivity to the qualities of the design and its context relative to the perceiver has the potential to change the relationship of digital space to digital place.

scholarly journals Dynamic Visualization of Information: From Database to Dataspace

2005 ◽  
Vol 9 (1) ◽  
pp. 31-38
Author(s):  
Claude St-Jacques ◽  
◽  
Louis-Claude Paquin ◽  
Keyword(s):  
Cognitive Skills ◽  
Multimedia Databases ◽  
Dynamic Visualization ◽  
Original Solution ◽  
Mapping Algorithm ◽  
Cognitive Limitations ◽  
The Media ◽  
Immersive Environment ◽  
Relationship Of ◽  
The Relationship

This paper explores a generalization of the Teleweb project [1] through an XML protocol. The research aims to provide friendly online access to large multimedia databases where the "content or topic" of the media units of texts, sounds or video, is indexed with an arbitrary set of descriptors. Among others, the deliverables of Teleweb consist of a mapping algorithm for a dynamic broadcast and a visualization interface. To go beyond the cognitive limitations of listings as results of database requests, we design an original solution: a topological representation into a 3D image of the relationship among the respective units. Instead of browsing through lists of thousands of units, ten at a time, the user is engaged in a dynamically created immersive environment, where he can control his own navigation over the information. To model the relationship of proximity between units, we use the soft computing capability of the fuzzy logic. Converted into topological data, the degree of the relationship of one unit with another is used to generate a space by soliciting the user's cognitive skills of visual perception instead of by memorization. The database then becomes a data-space.

Introduction

2016 ◽  
pp. xxiv-20
Author(s):  
Douglas Rosenberg
Keyword(s):  
Twentieth Century ◽  
Virtual Reality ◽  
Relationship Of ◽  
The Relationship ◽  
Experimental Films ◽  
Contemporary Approach ◽  
New Millennium

There have been important developments in the relationship of dance to the screen since the earliest days of photography. But it was not until the latter part of the twentieth century that it became apparent that there was an identifiable collective body of work that might be formally called screendance. It’s a tradition that continues from pioneers like Maya Deren and Yvonne Rainier, to the experimental films of Norman McLaren and much later dance works incorporating virtual reality. Since the start of the new millennium screendance, through dancefilm festivals and museum and gallery exhibitions, as well as a significant body of research from established scholars and PhD candidates, has become an international movement. This introduction creates a context for thinking about screendance as global scholarship and provides a model for a contemporary approach to writing that is simultaneously historical, practical, and theoretical.

scholarly journals Redressing the Ocularcentric Culture of architectural design: A Phenomenological and Participatory Approach in VR

2021 ◽  
Author(s):  
Elisaveta Boulatova ◽  
Vincent Hui
Keyword(s):  
Virtual Reality ◽  
Architectural Design ◽  
New Technology ◽  
Virtual Prototyping ◽  
Participatory Approach ◽  
Design Stage ◽  
Digital Space ◽  
Architectural Representation ◽  
Relationship Of ◽  
The Relationship

In the development of architectural representation, the image has become a metonym of architectural experience. This productive tension is maintained by the expectation of fragmented representation to identify and reproduce the experiential and phenomenological dimensions perceived in the physical experience with architecture. Returning to the investigation of representation and perception exemplifies that each new technology introduces a new scale of extension in both design capability and opportunity for feedback. The degree of immersivity introduced by virtual reality technologies elicits several scales of experience. This thesis uses virtual prototyping in the design stage to elicit a product that is not a reflection of intention, but a result of something discovered, evaluated and experienced in immersion prior to realization. An increase in receptivity to the qualities of the design and its context relative to the perceiver has the potential to change the relationship of digital space to digital place.

scholarly journals Skin Conductance Responses to a Discrete Threat in Virtual Reality: Associations with Psychopathy and Anxiety

2021 ◽  
Author(s):  
Luna C. M. Centifanti ◽  
Steven M. Gillespie ◽  
Nicholas D. Thomson
Keyword(s):  
Virtual Reality ◽  
Skin Conductance ◽  
Conduct Problem ◽  
Psychopathic Traits ◽  
Antisocial Process Screening Device ◽  
Skin Conductance Responses ◽  
Fear And Anxiety ◽  
Screening Device ◽  
Relationship Of ◽  
The Relationship

AbstractPeople with high levels of psychopathic traits are often described as fearless and lacking in emotional depth, particularly when evaluating threats in their environments. Skin conductance responsivity (SCR) to negative emotional stimuli represents a robust autonomic correlate of conduct problem behavior in children (Fanti et al., in Neuroscience and Biobehavioral Reviews, 100, 98–107, 2019). However, studies that have examined threat-related processing in youth with conduct problems have tended to use a variety of negative stimuli that might induce various and unspecific negative emotions. Few studies have taken in to account the moderating effects of anxiety on the relationship of distinct psychopathic traits (e.g., narcissism, callousness, impulsivity) with SCR to a fear inducing stimulus. In this study, we examined SCR to a virtual reality rollercoaster drop – that is, a discrete fear inducing event – in a sample of 75 youths (61 males; M = 14 years, SD = 1.4) enrolled in a non-mainstream school. The rollercoaster drop was used to more clearly examine an event-related response to a discrete threat, rather than examining SCR throughout the rollercoaster ride. We used the teacher-reported Antisocial Process Screening Device (Frick & Hare, in Antisocial process screening device: APSD. Toronto: Multi-Health Systems, 2001) to examine the relations of distinct psychopathic traits with SCR and self-reported anxiety. Lower anxiety was associated with higher callousness, but only in youths with low SCR to discrete threat. These findings suggest that fear and anxiety show complex and interactive relations with distinct psychopathic traits.

Use of a Volumetric Target for Image-guided Surgery

Neurosurgery ◽  
2006 ◽  
Vol 59 (3) ◽  
pp. 651-659 ◽  
Author(s):  
Philip L. Gildenberg ◽  
Jeffrey Labuz
Keyword(s):  
Virtual Reality ◽  
Video Camera ◽  
Target Volume ◽  
Preoperative Imaging ◽  
Guided Surgery ◽  
Accurate Localization ◽  
Stereotactic Frame ◽  
Surgical Field ◽  
Relationship Of ◽  
The Relationship

Abstract A VIRTUAL REALITY system has been devised to superimpose a computer-generated rendering of a volumetric target to be surgically approached or resected on a real-time video image of the surgical field. A stereotactic frame is used to register the image from the video camera with the image of the target volume for accurate localization. The volumetric target is obtained from preoperative imaging studies and can be modified to adjust the intended line of resection or to avoid eloquent vascular or neural tissue. The computer-generated image is updated throughout surgery to visualize only that part of the tumor under resection so the surgeon may guide the resection along the border of the mass or intended preplanned line of resection. To date, 74 intracranial tumor resections have been performed under video virtual reality guidance. Postoperative scanning corresponds in every case with preoperative planning. This system is also designed to be adapted to frameless guidance, which can be further enhanced by the incorporation of an audible tone to signal the relationship of the tip of the resection instrument to the line of resection.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

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