VR Model Research Articles

Integration of Red Cultural Resources into the Teaching of Civics in College Curriculum Based on VR Modeling

Abstract The broadening of the teaching field and the innovation of the teaching form of the Civics course in colleges and universities are important links in the teaching reform of the Civics course. This paper relies on the reality support of red cultural resources integrated into the teaching of civic politics class of VR technology, selects the influencing factors to build a structural equation model, carries out correlation analysis and the measurement of model path coefficients, and mines the factors affecting the integration of red cultural resources into the teaching, of course, civic politics. On this basis, we explore the practical path of integrating red resources into the teaching of Civics courses in colleges and universities based on the VR model and combine the descriptive statistical analysis and multiple regression analysis to explore the effectiveness of integrating red cultural resources into the teaching of Civics based on the VR model in four dimensions. Learning motivation, self-efficacy, difficulty expectation, classroom environment, group influence, curriculum design, facilitation, and teaching ability all significantly affected the integration of red resources into Civics and Political Science teaching (P < 0.05). Based on the VR model, the red cultural resources have a better effect of integrating into the teaching of ideology and politics, and the scores of all dimensions are more than 4, among which the score of emotional identity is the highest, 4.566. The use of VR technology is an inevitable trend of education modernization, and colleges and universities should apply it to enrich and expand the content of “curriculum ideology and politics” and to promote the construction of information technology and teaching reform of the ideology and politics in colleges and universities. The modernization of education is inevitable due to the use of VR technology.

Simulator education in Japanese dental education.

Advances in information and communication technology (ICT) and digital technology have contributed greatly to the development of educational methods, and new educational styles have been introduced over the past several years. In recent years, it has become possible to provide more realistic simulator training to prepare for patient care through the development of phantom heads with jaws and artificial teeth that reflect actual anatomical structures and composition. While these phantom head simulator resources are becoming more realistic, the development of digital devices utilizing virtual reality has enabled training that is even more realistic than the jaw models, such as scanning the teeth and transfer this scan into a VR model in the simulator which can be used to practice on prior to treating the patient. There was a basic research report on the development of VR haptics simulators in Japan about 20 years ago, but there have been no reports for some time since then, and there are several reports on VR haptics simulators published after 2018. Even now, in terms of utilization in dental education, it is difficult to say that VR haptics simulator has been widely introduced in Japan. The reasons for this may be related to the evaluation system for clinical dental skills in the Japanese dental education system, as well as issues with budgets and in current condition of dental clinical practice in dental schools. It must be that the VR haptics simulator will be utilized in terms of preparatory training for patient care as clinical dental practice participation is enhanced in the future.

Retracted: Art Product Recognition Model Design and Construction of VR Model

Retracted: Art Product Recognition Model Design and Construction of VR Model

Digital management method of municipal infrastructure engineering construction

In this paper, the digital management method of municipal infrastructure engineering construction is proposed, to improve the management level of municipal infrastructure engineering construction. After determining the project construction cycle, BIM technology is used to build the municipal infrastructure engineering model, screen the errors in the model through collision and roaming inspection, and use the DELMIA module of BIM software to realize the visual management of municipal infrastructure construction progress. BIM-VR conversion software is selected to convert the three-dimensional model of municipal infrastructure into a VR model, and immersively view the construction site of municipal infrastructure engineering through VR equipment, so as to realize the dynamic digital management of municipal infrastructure engineering construction. The experimental results show that this method can realize the digital management of municipal infrastructure engineering construction, accurately predict the project cycle of municipal infrastructure engineering construction, and ensure the smooth progress of municipal infrastructure engineering construction.

Location-Based Visible Region Recognition in Extra-Large Massive MIMO Systems

Extra-large massive multiple-input multiple-output (XL-MIMO) is envisioned to be a promising technology for 6G wireless, where the number of antennas is greatly increased to a new extent, resulting in extra large aperture arrays. In this case, different users may see different array parts (termed as visible region, VR) due to the spatial non-stationarity. Exploiting the VR information can facilitate low-complexity transmission design, but how to acquire this information for a large amount of users is still challenging. To this end, we first establish a VR model for XL-MIMO systems and show that a user's VR is location-dependent. Assuming that the VRs of some beacon users can be known a priori, we propose three location-based VR recognition schemes, including Voronoi cell partition, weighted Voronoi cell partition, and a neural network (NN) approach termed VR-Net, which takes the location of a user as input and returns its VR index as output. Simulation results show that all schemes can achieve high VR recognition accuracy if the number of beacon users is sufficiently large. Notably, in the more practical scenario that the available location-VR dataset is limited, the proposed VR-Net is able to achieve much better recognition performance.

Portable Hotel Management System Using Virtual Reality

In todays era, people often go to restaurants. So, good hotel management is necessary to increase the number of customers. To enhance it, a VR model is being developed. The main use of this VR model is to reduce the customer’s interaction with the servers and also increase customer satisfaction. VR not only increases satisfaction but also enhances user-friendliness. The existing system has a pen-based technology that is used to select the menu. But, in the updated system a touch screen system has been enabled to increase the accuracy. Customers can order or place the menu through a VR device preinstalled in their tables to reduce the manpower.

Using Virtual Reality for Deep Inferior Epigastric Perforator Flap Preoperative Planning.

This prospective case series feasibility study was conducted in two tertiary medical centers. Participants were women slated to undergo free transverse rectus abdominis muscle, unilateral or bilateral deep inferior epigastric perforator flap immediate breast reconstruction. Based on a routine CTA, a 3D VR model was generated. Before each procedure, the surgeons examined the CTA and then the VR model. Any new information provided by the VR imaging was submitted to a radiologist for confirmation before surgery. Following each procedure, the surgeons completed a questionnaire comparing the two methods. Thirty women between 34 and 68 years of age were included in the study; except for one, all breast reconstructions were successful. The surgeons ranked VR higher than CTA in terms of better anatomical understanding and operative anatomical findings. In 72.4% of cases, VR models were rated having maximum similarity to reality, with no significant difference between the type of perforator anatomical course or complexity. In more than 70% of the cases, VR was considered to have contributed to determining the surgical approach. In four cases, VR imaging modified the surgical strategy, without any complications. VR imaging was well-accepted by the surgeons who commented on its importance and ease compared with the standard CTA presentation. Further studies are needed to determine whether VR should become an integral part of preoperative deep inferior epigastric perforator surgery planning.

Virtual Reality in Space Technology Education

The simplification of space science and technology for students K–12 is a challenging task for educators. Virtual reality and augmented reality are educational techniques that introduce the concept of educational games. Moreover, those techniques have a stunning effect on students. This work presents the utilization of virtual reality models to teach students about the satellite types, satellite subsystems, the satellite assembly and integration process, watching the rocket launch carrying the satellite and observing the satellite in its orbit in virtual space laboratories. A 10-min mission in virtual laboratories will effectively improve the learning outcomes. In addition to the VR feature, a set of activities and short movies are considered to be beneficial for use by students to enrich the teaching results. Finally, the VR model results confirmed that the students’ knowledge about the space technology cycle is boosted.

Metaverse Simulation Based on VR, Blockchain, and Reinforcement Learning Model

Abstract: With advancements in virtual reality and the boom of the Metaverse, the technology underlying modern games is progressing rapidly. Virtual reality and current Artificial Intelligence algorithms have resulted in impressive results and immersive user experiences. This proposed work aims to create a first-person blockchain figure VR environment incorporating reinforcement learning and imitation learning methods. Supervised and reinforcement learning work using input-output mapping, but the critical difference is that reinforcement learning uses reward and penalty, which are positive and negative action indicators, respectively. The blockchain-based non-fungible agent, based on this indication, learns which actions are favourable. For a better experience, these profitable actions with imitation learning in the state action format are mapped further. In this environment, reinforcement learning is trained with various parameters such as Sensory complexity, Logic complexity for solving tasks, social complexity, and Physical complexity. This simulation enables users to use NFT guns to shoot enemy agents. These agents have been trained to navigate the map using Reinforcement and Imitation learning and shoot us whenever they sense our presence. The simulation is complete if the user kills every agent before his health level finishes. This proposed work highlights the potential of VR, Blockchain, and reinforcement learning in making Metaverse more interactive and impressive

3D DATA INTEGRATION FOR WEB BASED OPEN SOURCE WebGL INTERACTIVE VISUALISATION

Abstract. Recent advances in open-source geospatial technologies in WebGIS allowed the visualization of a 3D complex environment on the web, exploiting realistic Globe reproduction of the real territorial asset. At the same time, in the field of gaming technologies, the new possibilities offered by open-source WebGL JavaScript libraries allowed the creation of Virtual Reality navigation models on the web. The integration between 3D GIS globe navigation models and VR environment navigation is a solution that offers a further level of detail in web navigation, exploiting the capabilities of web browsers in the best way. This research further contributes to this field, showing a workflow to integrate different 3D data in a VR and 3D WebGIS navigation model. The case study for this research is the new building of the University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC) of Enschede (The Netherlands). This work tests the online integration of variety of 3D input data that can lead to different Levels of Details (LoD) of the buildings inside the Globe-based WebGIS platform. The developed solution works on desktop and mobile devices using the capabilities of the most common web browsers, avoiding any software installation. The result of this work is based on completely open-source solutions that offers the possibility to navigate within a 3D model, which is useful for citizens, governmental or private institutions in decision-making processes. This work represents a first step towards the ambition to generate a web Digital Twin platform to combine datasets from different sources in a unique open-source solution.

Art Product Recognition Model Design and Construction of VR Model

The artwork embodies a profound human history and carries the essence of human civilization. Its content is complex and covers a wide range. How to use advanced technology to quickly and accurately classify and retrieve is an important research topic in the field. In our study, we first according to the requirements of practical application scenarios and existing data conditions proposed an overall scheme of artwork identification and retrieval. Through the functional analysis of the software required and the comparison of various databases, we present the system architecture design and data conceptual design, and complete the system-level planning and design. Then, the crawler grabbing process is designed to obtain artwork graphic data, the artwork dataset production process and labeling status required for the target application scenario were introduced, and the category imbalance state of the target dataset was analyzed. Moreover, the database table structure design of the artwork identification and retrieval system, design and development of each functional module of the server, and the web client was introduced. Finally, according to the organization, structure, and characteristics of virtual reality system, a product design evaluation system based on virtual reality technology was constructed. A theoretical model VR-PDES was designed for the application of virtual reality technology in product design evaluation. The results of this research are of great significance for people to search for images of unknown artworks and improve the service capabilities and service levels of scenic spots.

MP24-18 THE EFFECT OF VIRTUAL 3D MODELS ON ROBOTIC PARTIAL NEPHRECTOMY: SECONDARY ANALYSIS OF A RANDOMIZED CLINICAL TRIAL

You have accessJournal of UrologyCME1 May 2022MP24-18 THE EFFECT OF VIRTUAL 3D MODELS ON ROBOTIC PARTIAL NEPHRECTOMY: SECONDARY ANALYSIS OF A RANDOMIZED CLINICAL TRIAL Joseph Shirk, David Thiel, Eric Wallen, Jennifer Linehan, Wesley White, Ketan Badani, and James Porter Joseph ShirkJoseph Shirk More articles by this author , David ThielDavid Thiel More articles by this author , Eric WallenEric Wallen More articles by this author , Jennifer LinehanJennifer Linehan More articles by this author , Wesley WhiteWesley White More articles by this author , Ketan BadaniKetan Badani More articles by this author , and James PorterJames Porter More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000002563.18AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Planning complex operations such as robotic-assisted partial nephrectomy requires surgeons to review two-dimensional Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) images to understand three-dimensional, patient-specific anatomy. We compared surgeon-reported effects of virtual 3-dimensional (3D) models on operative planning to surgical outcomes for patients undergoing robotic-assisted partial nephrectomy. METHODS: Ninety-two patients undergoing robotic-assisted partial nephrectomy performed by eleven surgeons at six large teaching hospitals were prospectively enrolled and randomized in a randomized, single-blind, clinical trial. Patients were assigned either to a control group undergoing usual preoperative planning with CT and/or MRI imaging only, or to an intervention group where imaging was supplemented with a three-dimensional, virtual reality model. This model was viewed on the surgeon’s mobile phone in regular three-dimensional format, and in virtual reality using an off-the-shelf virtual reality headset. The primary outcome measure was operative time. Secondary outcomes were clamp time, estimated blood loss, and hospital length of stay. For the 47 patients in the intervention group, surgeons filled out a survey in which they rated various aspects of the model and operation, either using yes/no questions or a 5-point Likert scale. The clinical survey responses were then compared to the outcome measures to determine if they affected the operation. RESULTS: Forty-seven patients were analyzed, and were generally older (65.6±10.5 yrs), white (81%), and male (60%). After controlling for significant covariates, using a multivariable linear model, cases in which the surgeon reported modifying their preoperative plan (28%) after viewing the model had significantly lower operative time, estimated blood loss, and clamp time (p <0.05). Increasing confidence after viewing the model was associated with significantly lower operative time, estimated blood loss, and clamp time as well (p <0.05) (Table 1). CONCLUSIONS: Use of a virtual 3D VR model when performing robotic partial nephrectomy improves key surgical outcome parameters. Source of Funding: None © 2022 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 207Issue Supplement 5May 2022Page: e400 Advertisement Copyright & Permissions© 2022 by American Urological Association Education and Research, Inc.MetricsAuthor Information Joseph Shirk More articles by this author David Thiel More articles by this author Eric Wallen More articles by this author Jennifer Linehan More articles by this author Wesley White More articles by this author Ketan Badani More articles by this author James Porter More articles by this author Expand All Advertisement PDF DownloadLoading ...

Landslide Susceptibility Assessment Considering Landslide Volume: A Case Study of Yangou Watershed on the Loess Plateau (China)

Because of the special geological conditions on the Loess Plateau, Landslide erosion is not only the main goal of prevention and control of geological disasters, but also an important erosion mode of soil and water loss in the basin. Thus, landslide susceptibility assessment before only considering landslide frequency is not far enough for a decision-maker. The study aims to consider both frequency and scale of landslides for a better landslide susceptibility evaluation. Taking the Yangou small watershed as an example, this study used a VR model, RIRA method, and the GIS method to comprehensively consider frequency and scale to analyze landslide susceptibility of the small watershed. Based on the detailed analysis of the existing literature, slope, elevation, NDVI, land-use, lithology, amount distant to road, amount distant to river, profile curvature, and rainfall as landslide are selected as the conditioning factors (CFs) of the landslide, to draw the sensitivity map. The map of landslide susceptibility was classified into five zones: very low, low, medium, high, and very high, and the cover areas occupy 6.90, 12.81, 12.83, 9.42, and 5.87 km2, respectively. A total of 60% of the landslide occurred in the zones of high and very high susceptibility, accounting for 87% of the total volume in the study area. The very high susceptibility is the area with a larger relief and along the river and road. The findings will help decision makers to formulate scientific comprehensive policies that take into account disaster prevention and soil conservation measures in specific regions.

Impact of VR virtual reality technology on traditional video advertising production

Impact of VR virtual reality technology on traditional video advertising production is studied in this paper. At present, this attempt of video advertising is slowly beginning. For fast-moving consumer goods, if the Internet coverage reaches a certain range, advertisers will naturally choose Internet media with a lower cost per thousand people to launch. For young people, the proportion of clothing and beverage industries will be increasing. The total time that everyone spends on media is relatively constant. Hence, we consider the proper combination with the VR model. The efficiency of the designed model is also validated.

P‐12.5: Investigation on AR / VR Displays Based on Novel Micro‐LED Technology

VR technology has got more and more attention in modern society. However, the core technology of VR, near to eye display technology, is still hard to attain people's expectations [1,2]. Micro‐LED array has great potential in VR display due to the advantage of small size, high brightness, high resolution, low energy consumption, and good monochromaticity compare to the other display technologies. In this paper, we compared Micro‐LED with LCD, OLED, LCoS and DLP, and taking the conclusion that Micro‐LED technology is the best choice for VR display. However, Micro‐LED technology is still facing some challenges. Moreover, a Micro‐LED array‐based VR model was proposed.

360-Degree Virtual Reality Consultation for the Structural Heart Disease Patient

ABSTRACT Background : Given the need to improve upon physician-patient communication, we employed a 360-degree Virtual Reality (360°VR) visualization platform for face-to-face consultations for TAVR and LAAO procedures. The platform creates patient-specific 360°VR models from volumetric scans (e.g., CT, MRI) that can be manipulated and viewed from any angle. Methods : Forty-six patients were prospectively surveyed regarding their 360°VR consultation experience for aortic valve stenosis and atrial fibrillation. For each patient, a custom 360°VR model was created from their high-resolution CT scans using Precision VR® by Surgical Theater and utilized during the 360°VR consultation. The proposed procedure was simulated in VR to show the interaction of the specific implant with the patient’s anatomy. Patient conversion rate was also evaluated. Results : Compared to prior standard (non-VR) consultations for the same medical condition, patients reported significantly higher satisfaction with the 360°VR consultation and increased understanding of their pathology and proposed procedure. Additionally, 98% of patients agreed the physician communicated well using Surgical Theater. Patients also reported that experiencing 360°VR helped improve their understanding (98%) and comfort level (93%) with the proposed procedure. Importantly, 91% of patients agreed they felt included in decisions about their treatment. Additionally, 76% rated the hospital a 9 or 10 and 81% said they would recommend this hospital. Conversion rates after 360°VR consultations were higher than those for pre-360°VR consultations (100% vs 86%, TAVR; 92% vs 68%, Watchman). Conclusion : These findings support the 360°VR technology as a powerful tool to enhance patient education, engagement and satisfaction for structural heart disease patients. Abbreviations 360°VR: 360-degree Virtual Reality; TAVR: transcatheter aortic valve replacement; LAAO: left atrial appendage occlusion; HCAHPS: Hospital Consumer Assessment of Healthcare Providers and Systems; CMS: Centers for Medicare and Medicaid Services

Seeing the invisible: From imagined to virtual urban landscapes

Urban ecosystems consist of infrastructure features working together to provide services for inhabitants. Infrastructure functions akin to an ecosystem, having dynamic relationships and interdependencies. However, with age, urban infrastructure can deteriorate and stop functioning. Additional pressures on infrastructure include urbanizing populations and a changing climate that exposes vulnerabilities. To manage the urban infrastructure ecosystem in a modernizing world, urban planners need to integrate a coordinated management plan for these co-located and dependent infrastructure features. To implement such a management practice, an improved method for communicating how these infrastructure features interact is needed. This study aims to define urban infrastructure as a system, identify the systematic barriers preventing implementation of a more coordinated management model, and develop a virtual reality tool to provide visualization of the spatial system dynamics of urban infrastructure. Data was collected from a stakeholder workshop that highlighted a lack of appreciation for the system dynamics of urban infrastructure. An urban ecology VR model was created to highlight the interconnectedness of infrastructure features. VR proved to be useful for communicating spatial information to urban stakeholders about the complexities of infrastructure ecology and the interactions between infrastructure features.

Kinetics of microwave radiation pulverized coal combustion based on non-isothermal thermogravimetric analysis

ABSTRACT The combustion characteristics of Yangquan (YQ) and Yungang (YG) coal samples before and after exposure to microwave radiation were studied using the non-isothermal thermogravimetric method, and the combustion rules of pulverized coal before and after microwave exposure to radiation were investigated. The results show that after microwave modification the ignition temperature (T i), burnout temperature (T j) and the temperature of maximum combustion rate (T k) of coal sample were all reduced about 10-20°C and the burnout time was shortened by 1–2 min, indicating that the provided treatment effectively improved the combustion performance of the pulverized coal. The characteristic indices C and S of the modified coal samples increased at a high heating rate (20°C/min), which suggests that the microwave modification has a stronger effect on the combustion performance of coal samples at high heating rates. As per the FT-IR spectrum curve, the absorption peak intensity of the higher activity group in the coal sample increased significantly after microwave modification. A comprehensive VR model was employed to model the kinetics of the coal combustion process. The resultant model had a correlation coefficient (R 2) of above 0.999 and root means square error (RMSE) of less than 0.018%, which indicating that the combustion behavior of the pulverized coal can be well described using the VR model. The activation energies E 1 and E 2 of M-YQ and M-YG modified via microwave treatment were decreased by 3.12 kJ·mol−1, 1.02 kJ·mol−1, 4.55 kJ·mol−1, and 8.14 kJ·mol−1 respectively, which further demonstrates that the microwave radiation can effectively accelerate reaction rate of the coal combustion per unit time.

Use of Virtual Reality Platforms in the Preoperative Planning and Intraoperative Navigation of Deep-Seated Cavernomas

Abstract INTRODUCTION Cavernous malformations in deep-seated eloquent cortex pose significant management challenges. Surgical resection, when indicated, carries a high risk of postoperative neurologic deficit. Obtaining safe surgical access is highly dependent upon location and the patient's clinical status. Three-dimensional (3D) virtual reality platforms, neuronavigation, and advanced neuroimaging can be used as adjuncts to determine and perform the safest surgical approach. METHODS Five patients who underwent surgical resection of deep seated cavernomas in eloquent cortex were included. 3D images were created from Diffusion Tensor MR Imaging (DTI) using a 360 Virtual Reality planning software (Surgical Theater SRP, Version7.4.0, Cleveland, Ohio). The Surgical Theater system was integrated with the neuronavigation system (Brainlab AG Version 3.0.5, Feldkirchen, Germany) to allow for real time evaluation of the 3D tractography. The 360°VR model was used to assess the location of the cavernoma and relevant anatomy, map multiple trajectories, and compare the advantages and disadvantages of each. SRP and Brainlab projections were used to determine the limits of the cavernoma, guide the placement of the tubular retractor, and confirm the approach vector intraoperatively. RESULTS Locations of the cavernomas included left caudate head, right superior colliculus, right posteroinferior thalamus, right insula, and left medulla. All patients underwent craniotomy and microsurgical resection. Two patients who presented with a neurologic deficit partially improved after prolonged rehabilitation. Three patients who were neurologically intact on presentation remained so post-op. Gross-total resection was obtained in all patients. CONCLUSION Virtual segmentation allows for better understanding of complex anatomic relationships between the lesion and surrounding critical structures. Advanced planning familiarizes surgeons to the patient in the context of the surgical field, increasing spatial and positional orientation. 3D virtual reality planning platforms in conjunction with neuronavigation and DTI can assist in choosing the optimal surgical corridor to achieve gross-total resection of deep-seated cavernomas while minimizing neurologic risk.

A Novel Immersive VR Game Model for Recontextualization in Virtual Environments: The μVRModel

In recent years, immersive VR had a great boost in terms of adoption and research perspectives, especially those regarding the serious gaming universe. Within the cultural heritage field, virtual re-contextualization of items is a crucial task to be accomplished by individuals to understand a 3D reconstructed environment as a whole and to assign a meaning and a value to a specific cultural object. Immersive VR and consumer HMDs still present several issues related to motion sickness and locomotion: the interest in real-walking techniques outperforming other locomotion methods is growing year by year, although limited by physical constraints, higher costs, or current technology. In this work, we propose a novel game model (μVR) that combines real-walking techniques and an adaptive, game-driven, multi-scale progression to craft immersive re-contextualization applications. The presented model aims to minimize motion sickness while fully exploiting the physical tracked area and augmenting the understanding of what the user is experiencing at different world scales. We define and formalize the μVR model and its components mathematically for the sake of reproducibility, then we present results from a pilot test planned to validate the model on real users. Results assure the usability and effectiveness of VR model even if further implementation needs to be done.