Three-dimensional Glasses Research Articles

Evaluation of Remote Surgical Hands-on Training in Veterinary Education Using a Hololens Mixed Reality Head-Mounted Display.

Conferencing system-assisted online classes have been conducted worldwide since the COVID-19 pandemic, and the use of three-dimensional glasses may improve pre-clinical veterinary education. However, students' satisfaction with this technique rather than their ability to perform surgery using these items has not been assessed. This study could potentially assess students' satisfaction with technique/instruction rather than their ability to perform surgery using these items.This study aimed to evaluate the effectiveness of remote online hands-on training in veterinary education using 3D glasses. Sixty students enrolled at the Faculty of Veterinary Medicineat Yamaguchi University voluntarily participated and were randomly divided into a 3D glasses and tablet group, each with 30 students. Each student completed one orthopedic and one ophthalmological task. The orthopedic task was performing surgery on a limb model, whereas the ophthalmological task involved incising a cornea on an eye model. The 3D glasses group participated in the ophthalmology task, then the orthopedic task, at a separate venue from the instructor. The tablet group participated in the same tasks using a tablet. In the student questionnaire, orthopedic screw fixation showed significantly higher levels of satisfaction in the 3D glasses group than in the tablet group, indicating a preference for this method. By contrast, for ophthalmic corneal suturing, the tablet group showed a significantly higher level of satisfaction than the 3D glasses group. Our findings showed that 3D glasses have a high educational value in practical training requiring depth and angle information.

YASARA Model-Interactive Molecular Modeling from Two Dimensions to Virtual Realities.

The industry's transition from three-dimensional (3D) glasses to virtual reality (VR) headsets has left modelers stranded without hardware supply, since walking around and waving arms in a virtual world is a great experience but also very tiring when doing time-intensive modeling work. We present a novel software implementation that uses a VR headset while sitting at a desk in front of the normal screen, which is beamed into the virtual reality together with keyboard, mouse, and chair using the headset's cameras and an extra tracker attached to the seat-back. Compared to 3D glasses, this yields a comparably relaxing but much more immersive workplace and provides additional possibilities such as taking molecules into one's hands, standing up, and walking or teleporting through the models. This VR functionality has been combined with a molecular graphics engine based on Vulkan, a next-generation cross-platform application programming interface (API) for GPUs and the successor of the widely used Open Graphics Library (OpenGL). It is built into the YASARA Model program, which includes many features like small and large molecule builders, electron densities, partial surfaces, contact analysis, coordinate manipulation, and animations. Interactive tutorials are provided to guide modelers into VR and familiarize them with the molecular modeling features. YASARA Model is available for Linux, Windows, Android, and MacOS (the latter without VR) with an introductory video at www.YASARA.org/vr.

A Protocol for Remote Cognitive Training Developed for Use in Clinical Populations During the COVID-19 Pandemic.

Many traumatic brain injury (TBI) survivors face scheduling and transportation challenges when seeking therapeutic interventions. The COVID-19 pandemic created a shift in the use of at-home spaces for work, play, and research, inspiring the development of online therapeutic options. In the current study, we determined the feasibility of an at-home cognitive training tool (NeuroTrackerX) that uses anaglyph three-dimensional (3D) glasses and three-dimensional multiple object tracking (3D-MOT) software. We recruited 20 adults (10 female; mean age = 68.3 years, standard deviation [SD] = 6.75) as the at-home training group. We assessed cognitive health status for participants using a self-report questionnaire and the Mini-Mental State Examination (MMSE), and all participants were deemed cognitively healthy (MMSE >26). At-home participants loaned the necessary equipment (e.g., 3D glasses, computer equipment) from the research facilities and engaged in 10 training sessions over 5 weeks (two times per week). Participant recruitment, retention, adherence, and experience were used as markers of feasibility. For program validation, 20 participants (10 female; mean age = 63.39 years, SD = 12.22), who had previously completed at least eight sessions of the in-lab 3D-MOT program, were randomly selected as the control group. We assessed individual session scores, overall improvement, and learning rates between groups. Program feasibility is supported by high recruitment and retention, 90% participant adherence, and participants' ease of use of the program. Validation of the program is supported. Groups showed no differences in session scores (p > 0.05) and percentage improvement (p > 0.05) despite the differences in screen size and 3D technology. Participants in both groups showed significant improvements in task performance across the training sessions (p < 0.001). NeuroTrackerX provides a promising at-home option for cognitive training in cognitively healthy adults and may be a promising avenue as an at-home therapeutic for TBI survivors. This abstract was previously published on clinicaltrials.gov and can be found at: https://www.clinicaltrials.gov/ct2/show/NCT05278273.

Universality of stringlet excitations as the origin of the boson peak of glasses with isotropic interactions

Nonphononic vibrations originating from disordered structures have garnered significant attention as a fundamental feature of glasses that distinguishes them from crystals. Recently, we discovered that one-dimensional (1D) stringlike vibrations without volume change are responsible for the boson peak in the reduced density of states of two-dimensional (2D) glasses [Y.-C. Hu and H. Tanaka, Nat. Phys. 18, 669 (2022)]. Here we investigate the vibrational properties of three-dimensional (3D) model glasses with isotropic repulsive and attractive interactions and find that the boson peak arises from stringlike quasilocalized transverse vibrations in these 3D systems. These results suggest that stringlike vibrations are the universal origin of the boson peak in both 2D and 3D model glasses, as long as the interaction is isotropic. Furthermore, we confirm that the characteristic frequency of the quasilocalized transverse vibrations, i.e., the boson peak frequency, coincides with the Ioffe-Regel limit of transverse phonons. These results imply the boson peak originates from the frequency-resonant scattering of transverse phonons by quasilocalized vibrations rather than phonon scattering due to elastic inhomogeneity. Our findings provide insights into the origin of low-temperature glass anomalies and inspire further research.

Predicting orientation-dependent plastic susceptibility from static structure in amorphous solids via deep learning

It has been a long-standing materials science challenge to establish structure-property relations in amorphous solids. Here we introduce a rotationally non-invariant local structure representation that enables different predictions for different loading orientations, which is found essential for high-fidelity prediction of the propensity for stress-driven shear transformations. This novel structure representation, when combined with convolutional neural network (CNN), a powerful deep learning algorithm, leads to unprecedented accuracy for identifying atoms with high propensity for shear transformations (i.e., plastic susceptibility), solely from the static structure in both two- and three-dimensional model glasses. The data-driven models trained on samples at one composition and a given processing history are found transferrable to glass samples with different processing histories or at different compositions in the same alloy system. Our analysis of the new structure representation also provides valuable insight into key atomic packing features that influence the local mechanical response and its anisotropy in glasses.

Power laws in pressure-induced structural change of glasses

Many glasses exhibit fractional power law (FPL) between the mean atomic volume va and the first diffraction peak position q1, i.e. v_{mathrm{a}} propto q_1^{ - d} with d ≃ 2.5 deviating from the space dimension D = 3, under compression or composition change. What structural change causes such FPL and whether the FPL and d are universal remain controversial. Here our simulations show that the FPL holds in both two- and three-dimensional glasses under compression when the particle interaction has two length scales which can induce nonuniform local deformations. The exponent d is not universal, but varies linearly with the deformable part of soft particles. In particular, we reveal an unexpected crossover regime with d > D from crystal behavior (d = D) to glass behavior (d < D). The results are explained by two types of bond deformation. We further discover FPLs in real space from the radial distribution functions, which correspond to the FPLs in reciprocal space.

The affordances and challenges of wearable technologies for training public service interpreters

Abstract Interpreter training has evolved from traditional face-to-face classroom settings to alternative modes of delivery such as online and blended learning because of the rise in information and communication technology. The limited body of literature shows that the most documented pedagogical application of interpreter training delivery is via virtual learning environments such as Moodle and Blackboard. To enrich the literature on technology use in interpreter training, a pilot project was conducted in which participant students and trainers accessed a three-dimensional virtual environment using wearable technology (i.e., three-dimensional virtual reality glasses) and students practiced interpreting using a prerecorded animated dialogue. A virtual reality platform was built using Unity 3D and run on Android to host the piloted dialogue, with a view to adding dialogues in the future to develop it into a healthcare interpreting training platform. Qualitative data collected through observations and semi-structured interviews were analyzed. The results show that using wearable devices in interpreter training has the potential to create immersive simulated environments for auto­nomous learning and to improve interpreter training when used with instructional support. However, challenges including physiological effects, level of authenticity, and the need for equipment support warrant further exploration and refinement of its pedagogical application in the future.

The effect of biomimetic mineralization of 3D-printed mesoporous bioglass scaffolds on physical properties and in vitro osteogenicity.

Three-dimensional Mesoporous bioactive glasses (MBGs) scaffolds has been widely considered for bone regeneration purposes and additive manufacturing enables the fabrication of highly bioactive patient-specific constructs for bone defects. Commonly, this process is performed with the addition of polymeric binders that facilitate the printability of scaffolds. However, these additives cover the MBG particles resulting in the reduction of their osteogenic potential. The present work investigates a simple yet effective phosphate-buffered saline immersion method for achieving polyvinyl alcohol binder removal while enables the maintenance of the mesoporous structure of MBG 3D-printed scaffolds. This resulted in significantly modifying the surface of the scaffold via the spontaneous formation of a biomimetic mineralized layer which positively affected the physical and biological properties of the scaffold. The extensive surface remodeling induced by the deposition of the apatite-like layer lead to a 3-fold increase in surface area, a 5-fold increase in the roughness, and 4-fold increase in the hardness of the PBS-immersed scaffolds when compared to the as-printed counterpart. The biomimetic mineralization also occurred throughout the bulk of the scaffold connecting the MBGs particles and was responsible for the maintenance of structural integrity. In vitro assays using MC3T3-E1 pre-osteoblast like cells demonstrated a significant upregulation of osteogenic-related genes for the scaffolds previously immersed in PBS when compared to the as-printed PVA-containing scaffolds. Although the pre-immersion scaffolds performed equally towards osteogenic cell differentiation, our data suggest that a short immersion in PBS of MBG scaffolds is beneficial for the osteogenic properties and might accelerate bone formation after implantation.

Video-rate full-Stokes imaging polarimeter using two polarization cameras

We show how to construct and calibrate a full-Stokes imaging polarimeter system by combining the video data from two separate polarization cameras with a nonpolarizing beamsplitter and a waveplate. As a result, this system can capture the full Stokes vector at each pixel for 3 megapixel images at up to 60 Hz. To demonstrate some of the advantages of measuring the s 3 Stokes vector component that is normally not measured in polarization cameras, we show three experiments: viewing three-dimensional glasses, detecting a scarab beetle in a natural environment via the circular dichroism of its shell, and mixing an optically active liquid with a neutral liquid.

Utility of digitally assisted vitreoretinal surgery systems (DAVS) for high-volume vitreoretinal surgery centre: a pilot study

AimTo compare the surgical experience and preferred imaging platform, between digitally assisted vitreoretinal surgery systems (DAVS) and analogue microscope (AM), for performing various surgical manoeuvres.Material and methodsA questionnaire was used...

The Effect of Audio-Visual Distraction on Catheterization Pain among School-Age Children

Background: Catheterization is the most common cause of pain and distress in children, which causes physical and psychological dysfunctions and disrupts the treatment. Therefore, the control of this type of pain should be considered as a priority for nursing care. The audio-visual distraction can be used to reduce the intensity of pain. Aim: The purpose of this study was to determine the effect of audio-visual distraction on catheterization pain among school-age children. Methods: This randomized clinical trial included 64 school-age children assigned into intervention and control group in Qods Hospital during 2016. Oucher face pain intensity scale was utilized to evaluate the intensity level of pain. Catheterization duration was also recorded in this study. Data were analysed in SPSS software (Version.18) through descriptive statistics, t-test, Mann-Whitney U test, and Spearman correlation analyses. Results: The mean ages of the intervention and control groups were 7.8±1.4 and 7.7±1.6, respectively. The results of the Mann-Whitney U test showed that the mean pain intensity was lower in the intervention group after using the three-dimensional glasses (P=0.01). Spearman correlation test results indicated that there were no significant differences between different ethnicities (P=0.37) and birth ratings (r=-0.061, P-value=0.63) in terms of mean pain intensity. Implications for Practice: According to the results, the use of distraction methods could reduce the pain. In addition, they facilitated medical procedures. The role of variables, such as age, gender, and duration of catheterization should be considered in pain intensity.

The Effectiveness of Three-Dimensional Glasses in the Visual Field Defect in Patients with Traumatic Brain Injury: A Novel Therapy (TAMKAN’s Technique)

The Effectiveness of Three-Dimensional Glasses in the Visual Field Defect in Patients with Traumatic Brain Injury: A Novel Therapy (TAMKAN’s Technique)

The yielding transition in periodically sheared binary glasses at finite temperature

Non-equilibrium molecular dynamics simulations are performed to investigate the dynamic behavior of three-dimensional binary glasses prepared via an instantaneous quench across the glass transition. We found that with increasing strain amplitude up to a critical value, the potential energy approaches lower minima in steady state, whereas the amplitude of shear stress oscillations becomes larger. Below the yielding transition, the storage modulus dominates the mechanical response, and the gradual decay of the potential energy over consecutive cycles is accompanied by reduction in size of transient clusters of atoms with large nonaffine displacements. In contrast, above the yield strain, the loss modulus increases and the system settles at a higher level of potential energy due to formation of a system-spanning shear band after a number of transient cycles.

Experimental studies of vibrational modes in a two-dimensional amorphous solid

The boson peak, which represents an excess of vibrational states compared to Debye’s prediction at low frequencies, has been studied extensively, and yet, its nature remains controversial. In this study, we focus on understanding the nature of the boson peak based on the spatial heterogeneity of modulus fluctuations using a simple model system of a highly jammed two-dimensional granular material. Despite the simplicity of our system, we find that the boson peak in our two-dimensional system shows a shape very similar to that of three-dimensional molecular glasses when approaching their boson peak frequencies. Our finding indicates a strong connection between the boson peak and the spatial heterogeneity of shear modulus fluctuations.

The Development of Novel Interoceptive Exposure Methods for Inducing Derealization and Depersonalization Symptoms.

Derealization and depersonalization and are commonly experienced by individuals with panic disorder. Although interoceptive exposure (IE) is a key therapeutic component in the treatment of panic disorder, there currently are few recognized ways to elicit reactions that successfully mimic dissociative symptoms commonly experienced during panic. We examined the ability of several novel methods that elicit anomalous and confusing perceptual experiences to induce at least moderately intense dissociative reactions in a college student sample (N = 34). Two of the novel procedures (i.e., stripes and hand) and a task previously identified as effectively eliciting dissociative symptoms, strobe light plus three-dimensional (3D) glasses reliably induced derealization/depersonalization reactions. The implications of these findings for further research and the clinical practice of IE in treatment of panic attacks are discussed.

Ultrathin silica films: the atomic structure of two-dimensional crystals and glasses.

For the last 15 years, we have been studying the preparation and characterization of ordered silica films on metal supports. We review the efforts so far, and then discuss the specific case of a silica bilayer, which exists in a crystalline and a vitreous variety, and puts us into a position to investigate, for the first time, the real space structure (AFM/STM) of a two-dimensional glass and its properties. We show that pair correlation functions determined from the images of this two-dimensional glass are similar to those determined by X-ray and neutron scattering from three-dimensional glasses, if the appropriate sensitivity factors are taken into account. We are in a position, to verify, for the first time, a model of the vitreous silica structure proposed by William Zachariasen in 1932. Beyond this, the possibility to prepare the crystalline and the glassy structure on the same support allows us to study the crystal-glass phase transition in real space. We, finally, discuss possibilities to use silica films to start investigating related systems such as zeolites and clay films. We also mention hydroxylation of the silica films in order to adsorb metal atoms modeling heterogenized homogeneous catalysts.

Switching plastic crystals of colloidal rods with electric fields

When a crystal melts into a liquid both long-ranged positional and orientational order are lost, and long-time translational and rotational self-diffusion appear. Sometimes, these properties do not change at once, but in stages, allowing states of matter such as liquid crystals or plastic crystals with unique combinations of properties. Plastic crystals/glasses are characterized by long-ranged positional order/frozen-in-disorder but short-ranged orientational order, which is dynamic. Here we show by quantitative three-dimensional studies that charged rod-like colloidal particles form three-dimensional plastic crystals and glasses if their repulsions extend significantly beyond their length. These plastic phases can be reversibly switched to full crystals by an electric field. These new phases provide insight into the role of rotations in phase behaviour and could be useful for photonic applications.

A low-cost visual occlusion device

In this article, we propose a method to develop a low-cost visual occlusion device. This device is modified using three-dimensional (3-D) glasses (used to watch 3-D TV) that are operated via the active shutter technique. Because 3-D glasses are sold worldwide, they are readily available; moreover, the price of 3-D glasses is lower than that of other types of equipment used as the basis for visual occlusion devices. Three-dimensional glasses employing the active shutter technique have the same structure as do commercial visual occlusion devices; the modification of a voltage-driven liquid crystal display is fairly simple. In this study, we evaluated the response time and transparency of the proposed low-cost visual occlusion device; the experiments yielded reasonable results. The proposed visual occlusion device can be fabricated under a price of $100.

Viewing the human microbiome through three-dimensional glasses: integrating structural and functional studies to better define the properties of myriad carbohydrate-active enzymes.

Recent studies have provided an unprecedented view of the trillions of microbes associated with the human body. The human microbiome harbors tremendous diversity at multiple levels: the species that colonize each individual and each body habitat; the genes that are found in each organism's genome; the expression of these genes and the interactions and activities of their protein products. The sources of this diversity are wide-ranging and reflect both environmental and host factors. A major challenge moving forward is defining the precise functions of members of various families of proteins represented in our microbiomes, including the highly diverse carbohydrate-active enzymes (CAZymes) involved in numerous biologically important chemical transformations, such as the degradation of complex dietary polysaccharides. Coupling metagenomic analyses to structural genomics initiatives and to biochemical and other functional assays of CAZymes will be essential for determining how these as well as other microbiome-encoded proteins operate to shape the properties of microbial communities and their human hosts.

Shear softening and structure in a simulated three-dimensional binary glass

Three-dimensional model binary glasses produced by quenching from a range of liquid temperatures were tested in shear over a range of strain rates using molecular-dynamics techniques. Tests were performed under constant volume and constant pressure constraints. The simulations revealed a systematic change in short-range order as a function of the thermal and strain history of the glass. While subtle signs of differences in short-range order were evident in the pair distribution function, three-body correlations were observed to be markedly more sensitive to the changes in structure. One particular structural parameter, the number of aligned three-atom clusters, was analyzed as a function of the degree of supercooling, the strain and the strain rate. The glasses quenched from the supercooled liquid regime were observed to contain an initially higher number of such clusters, and this number decreased under shear. Those quenched from high-temperature equilibrium liquids contained lower numbers of such clusters and these increased or remained constant under shear. The glasses quenched from the supercooled liquid regime showed higher strength, more marked shear softening, and an increased propensity toward shear localization. The evolution of this structural parameter depended both on its initial value and on the imposed shear rate. These results were observed to hold for simulations performed under both constant density and constant pressure boundary conditions.