Use Of 3D Simulations Research Articles

How Does Virtual Reality Technology Affect Suicidal Ideation in Society?

Mental health issues such as anxiety and depression are on the rise in communities. Ignoring severe mental health issues can lead to suicide, which is a global public health issue. The use of advanced tools and methods to prevent suicide can help save human lives. Visual tools and virtual technologies have multiple applications in the medical and educational fields. The aim of this study was to investigate the effect of using virtual reality (VR) technology on suicidal thoughts. A quasi-experimental study was conducted, in which 189 individuals who had a history of suicide were tested. These individuals were divided into three groups: one control group and two intervention groups that received traditional and VR-based training for 90 days. The Beck Scale for Suicide Ideation was used. The posttest results after the training period showed that conducting the training course had a statistically significant effect on individuals' suicidal behaviour and those who participated in the VR-based training course had better improvements in suicidal thoughts. Therefore, the use of 3D simulation and visualisation tools can have a significant impact on individuals' thoughts and perceptions. The results of this study have practical implications for hospital managers and counsellors in healthcare centres to use VR technology in counselling and training courses to improve the behaviour of individuals with a history of suicide.

Air Canvas Using MediaPipe for Computer Vision in Unity 3D Hand Tracking

In this paper, we present the implementation of an Air Canvas using MediaPipe for Computer Vision within a 3D environment using the Unity Game Engine. In our previous work, we found that, regardless of the initial parameters, simulations often led to rapid extinctions. In this model, we implemented an Air Canvas and Computer Vision system integrated with Unity’s 3D World. Our goal was to achieve system stabilization, long-term operation, and more realistic simulation by incorporating 3D evolution. Using the Unity Game Engine, we created and managed a closed 3D ecosystem environment, either based on artificial or real-world maps. This simulation of ecosystems and the analysis of the data generated can serve as a starting point for further research, particularly in sustainability. Our system is openly accessible, allowing users to customize and upload their parameters, maps, and objects, and define inheritance and behavioural patterns, enabling them to test their hypotheses based on the data generated. The goal of this article is not to create and validate a model but to provide an IT tool. For evolutionary researchers, the system allows the creation and presentation of simulations, including animated conference presentations for enhanced visualization and engagement. The use of 3D simulation is particularly valuable for educational purposes, engaging students and increasing their interest in 3D interactive worlds. Students can observe how ecosystems behave, how natural selection supports adaptability, and how competition impacts species.

The crux of astronomical alignment in Neolithic Malta: Using 3D simulation to produce new data

Like many prehistoric monuments, the Neolithic Temples of Malta have been the subject of astronomical studies, aimed at identifying possible alignments with cosmological events. The orientations of several sites have been suggested as evidence of an interest in the movement of the sun, moon, and stars, and of the importance of certain days such as the equinoxes and solstices. However, while individual sites may seem to align to specific events, a wider study into patterns of orientation is needed to determine whether these are the result of human action or random chance. In this paper, alignments at extant sites are investigated through 3D simulation, providing new data and statistical evidence for (and against) previously identified alignments. The methodology proposed uses Raycasting in Unity3D to identify the accuracy of orientations throughout the Maltese Neolithic (3700-2400 BC) at 23 temples sites. The orientation is analysed in relation to plausible astronomical events, as suggested by material evidence. The data produced shows possible patterns of alignment, rejecting commonly accepted targets such as the sun, in favour of a cautious acceptance of an alignment with the constellation of Crux. This shift in focus alters heliocentric interpretations of Maltese temple culture, while also supporting a wider landscape cosmology. This study demonstrates the use of 3D simulations as a tool for investigation of archaeological queries. The research not only provides a new methodology for the automatic calculation of alignment patterns, but also establishes how 3D simulation can create new data which can impact current archaeological theories.

Thoughts of Biology Virtual Lab: A Meta-analysis study of Urogenital System Practicum in Universitas Terbuka

Practicum is an essential part of the student learning process. It promotes strengthening scientific process skills to students. On the other hand, limited access in experiencing hands-on activities requires serious attention due to the characteristics of a distance education system that restrains face-to-face activities in student learning. For this reason, a virtual lab is necessary to meet the needs of students to comprehend the functions of scientific actions while their learning. The paper will discuss the role of a virtual lab in the Biology practicum in Universitas Terbuka (UT). This paper is a meta-analysis study involving preliminary data of UT students who attended biology practicum courses during the Covid-19 pandemic. The research recommends using the virtual Lab to advance biological knowledge in biology practicum and Virtual Reality as suitable for urogenital system material. The use of 3D simulation in Virtual Reality should provide an exciting and meaningful learning experience for students.

Using the Unity Game Engine to Develop a 3D Simulated Ecological System Based on a Predator–Prey Model Extended by Gene Evolution

In this paper, we present a novel implementation of an ecosystem simulation. In our previous work, we implemented a 3D environment based on a predator–prey model, but we found that in most cases, regardless of the choice of starting parameters, the simulation quickly led to extinctions. We wanted to achieve system stabilization, long-term operation, and better simulation of reality by incorporating genetic evolution. Therefore we applied the predator–prey model with an evolutional approach. Using the Unity game engine we created and managed a closed 3D ecosystem environment defined by an artificial or real uploaded map. We present some demonstrative runs while gathering data, observing interesting events (such as extinction, sustainability, and behavior of swarms), and analyzing possible effects on the initial parameters of the system. We found that incorporating genetic evolution into the simulation slightly stabilized the system, thus reducing the likelihood of extinction of different types of objects. The simulation of ecosystems and the analysis of the data generated during the simulations can also be a starting point for further research, especially in relation to sustainability. Our system is publicly available, so anyone can customize and upload their own parameters, maps, objects, and biological species, as well as inheritance and behavioral habits, so they can test their own hypotheses from the data generated during its operation. The goal of this article was not to create and validate a model but to create an IT tool for evolutionary researchers who want to test their own models and to present them, for example, as animated conference presentations. The use of 3D simulation is primarily useful for educational purposes, such as to engage students and to increase their interest in biology. Students can learn in a playful way while observing in the graphical scenery how the ecosystem behaves, how natural selection helps the adaptability and survival of species, and what effects overpopulation and competition can have.

Flexible Rockfall Barrier Post Support Performance: Deflection as a Positive Attribute

Rockfall has plagued infrastructure for centuries, whether generated by natural weathering of unaltered rock slopes or due to jointing and weaknesses in constructed rock slopes. Rockfall in the U.S. has been formally studied since the early 1960s, when Arthur Ritchie, chief geologist with the Washington State Department of Highways, assessed inadequacies with the state of practice relative to catchment ditch design. Since that time, rockfall analysis has become more sophisticated with the use of 3D simulation and rockfall runout models. Several international manufacturers have developed flexible rockfall barrier (fence-like) systems, the designs of which are continuously updated and improved based on testing and field performance. Most flexible rockfall barrier manufacturers also offer debris flow and avalanche barriers using similar elements.

3D- SIMULATION AS THE METHOD OF TOPICAL DIAGNOSTICS IN THE SURGICAL TREATMENT OF GIPERPARATIREOZA

Urgency of theme. Morbidity by primary giperparatireozom (PGPT) varies from 0,4 to 18,8 the cases for 10000 the populations. Defeat the parathyroid glands in patients with second (VGPT) and tertiary (TGPT) giperparatireozom, who are found on program hemodialysis reaches 32-34%. The only method of treatment is surgical. The effectiveness of operational interference in many respects depends on verification and visualization of all the pathologically changed parathyroid glands. Purpose. To improve topical diagnostics of parathyroid adenomas by constructing the personified preoperation 3d-model of the anatomical formations of neck on basis MRT. Materials and methods. Preoperation 3d-simulation is executed 10 to the patients: 3 by patient with PGPT, 7 patient with TGPT. For obtaining the personified 3d-model were used results MRT and special software (priority information №2018122324, also, 2018122326 from 18.06.2018). In the regime of preoperation planning were built the three-dimensional models of neck with the designation of trachea, the thyroid gland, the parathyroid glands, gullet, collar bones. Obtained results. With the use of preoperation 3d-simulation it was possible to avoid diagnostic eksploratsii of neck in search of not less 4th parathyroid glands, was reduced the time of the fulfillment of operational interference on the average on 30±15 minutes, was possible to avoid the postoperative complications, connected with the damage of recurrent guttural nerves. Conclusion. The method proposed is the reliable method of pre-operation topical diagnostics of pathologically changed parathyroid glands. With the use of 3d-simulation the operation time decreases, is reduced the need for traumatic and expensive on the time eksploratsii of neck, necessary for the search for changed parathyroid glands, and, correspondingly, the probability of the development of postoperative complications. This method can serve as the objective criterion of visualization parathyroid glands and also as the criterion of effectiveness of the carried out treatment

Use of 3D Simulation to Design Theoretical and Real Pipe Inspection Mobile Robot Model

Abstract The main aim of the paper is to present the process of design pipe inspection mobile robot by using 3D simulations. Next methods and processes of making designed components was described. Finally, functional tests of a constructed real robot model such as speed tests, inclined pipe test was carried out. The robot was specifically designed to inspect sewer pipelines. The mobile robot is equipped with a vision system. The structure of the pipe inspection robot allows adjustments to the geometrical parameters of the robot to suit the sewer pipes diameters by using in the construction of a pneumatic system with an actuator.

Analysing the effect of the use of 3D simulations on the performance of engineering students in a robotics course: Findings from a pilot study

During the last decade, students of mechanical engineering, electrical engineering, and mechatronics have been interested in studying robotics. It is a challenge for robotics course professors to get students to clearly understand the basic theoretical concepts for its correct application to solve problems, and to motivate them to achieve the best performance. Previous works proposed the use of 3D models to perform the simulation of industrial robots in class and consequently to reinforce the students’ theoretical and practical concepts. However, it has not yet been clearly demonstrated how the use of robots and simulations helps improve students’ academic performance. In this paper, the main contribution consists of a formal evaluation in which the comparison between the use of two teaching methods was carried out. In the first teaching method (traditional method), the professor used PowerPoint presentations and oral explanations to teach theoretical concepts and solve exercises (Group A). In the second teaching method, the professor added the use of 3D simulations together with the traditional method to teach theoretical concepts and solve exercises (Group B). Students of both groups performed the same written exam about forward kinematics in order to study and analyse the differences between the methodology used with Group A and the methodology used with Group B. This exam consisted of solving three exercises with different robot complexity levels. The results demonstrate that the performance of the students in group B is significantly better than that of the students in group A. In other words, the use of 3D simulations improves student’s academic performance, and provides a teaching tool to enhance the way the professors teach.

Laparoscopic splenic hilar lymph node dissection for proximal gastric cancer using integrated three-dimensional anatomic simulation software.

Laparoscopic lymph node (LN) dissection along the distal splenic artery (Station No. 11d) and around the splenic hilum (Station No. 10) remains challenging even for skilled surgeons. The major reason for the difficulty is the complex, multifarious anatomy of the splenic vessels. The latest integrated three-dimensional (3D) simulations may facilitate this procedure. Usefulness of 3D simulation was investigated during 20 laparoscopic total gastrectomies with splenic hilar LN dissection while preserving the spleen and pancreas (LTG+PSP) or with splenectomy (LTG+S). Clinical information acquired by 3D simulation and the consistency of the virtual and real images were evaluated. Furthermore, clinical data of these patients were compared with that of the patients who underwent the same surgery before the introduction of 3D simulation (n=10), to clarify its efficacy. The vascular architecture and morphologic characteristics were clearly demonstrated in 3D simulation, with sufficient consistency. The median durations of 14 LTG+PSP and 6 LTG+S operations were 318 and 322min, respectively. The estimated blood losses were 18 and 38g, respectively. There were no deaths. One postoperative peritoneal abscess (grade II according to Clavien-Dindo) was recorded. A comparison of clinical parameters between surgeries without or with 3D simulation showed no differences in operation time, blood loss, or complication rate; however, the number of retrieved No. 10 LNs has significantly increased in cases with the use of 3D simulation (p=0.006). This kind of surgery is not easy to perform, but the latest 3D computed tomography simulation technology has made it possible to reduce the degree of difficulty and also to enhance the quality of surgery, potentially leading to widespread use of these techniques.

CONVECTION THEORY AND SUB-PHOTOSPHERIC STRATIFICATION

As a step toward a complete theoretical integration of 3D compressible hydrodynamic simulations into stellar evolution, convection at the surface and sub-surface layers of the Sun is re-examined, from a restricted point of view, in the language of mixing-length theory (MLT) . Requiring that MLT use a hydrodynamically realistic dissipation length gives a new constraint on solar models. While the stellar structure which results is similar to that obtained by YREC and Garching models, the theoretical picture differs. A new quantitative connection is made between macro-turbulence, micro-turbulence, and the convective velocity scale at the photosphere, which has finite values. The "geometric parameter" in MLT is found to correspond more reasonably with the size of the strong downward plumes which drive convection (Stein and Nordlund 1998), and thus has a physical interpretation even in MLT. Use of 3D simulations of both adiabatic convection and stellar atmospheres will allow the determination of the dissipation length and the geometric parameter (i.e., the entropy jump), with no astronomical calibration. A physically realistic treatment of convection in stellar evolution will require additional modifications beyond MLT, including effects of kinetic energy flux, entrainment (the most dramatic difference from MLT found by Meakin and Arnett 2007), rotation, and magnetic fields (Balbus 2009}.

Use of 3D simulations to investigate the effect of grooves on the surface of a plate impact experiment

Recent studies have demonstrated that the surface finish for a plate impact specimen has little influence on the Hugoniot stress attained in it, as obtained from a uniaxial strain loading scenario [1]. However, the surface finish did clearly affect the rise time of the gauge trace due to local inhomogenieties in the wave structure. The Eulerian hydrocode GRIM3D has been used to investigate the detailed wave profiles obtained in copper to explain and quantify these effects. The simulations have been used to compare the Hugoniot stress, rise times and general wave structure in the specimen and compared with idealised an equivalent ID loading case. An attempt is also made to identify the critical groove depth and width before the wave profile is significantly affected compared to the ID case. This is important since some specimens are difficult to prepare to very high tolerances. The results are discussed in terms of material response, numerics and with a recommendation for further work.

3D Parallel Simulations of Fluctuation Effects in pHEMTs

The use of 3D simulations is essential in order to study the effects of fluctuations when devices are scaled to deep submicron dimensions. A 3D drift-diffusion device simulator has been developed to effectively simulate pseudomorphic high electron mobility transistors (pHEMTs) on a distributed memory multiprocessor computer. The drift-diffusion equations are discretized using a finite element method on an unstructured tetrahedral mesh. The obtained set of equations is solved in parallel on an arbitrary number of processors using the message-passing interface library. We have applied our simulator to a 120 nm pHEMT based on the Al0.3Ga0.7As/In0.2Ga0.8As interface and carried out a calibration to real experimental data.