There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Let's read! We will often find out this sentence everywhere. When still being a kid, mom used to order us to always read, so did the teacher. Some books are fully read in a week and we need the obligation to support reading. What about now? Do you still love reading? Is reading only for you who have obligation? Absolutely not! We here offer you a new book enPDFd the perception of the visual world to read.

The Perception of the Visual World. By James J. Gibson. U.S.A.: Houghton Mifflin Company, 1950 (George Allen & Unwin, Ltd., London). Price 35s.

This paper presents a new reflectance model for rendering computer synthesized images. The model accounts for the relative brightness of different materials and light sources in the same scene. It describes the directional distribution of the reflected light and a color shift that occurs as the reflectance changes with incidence angle. The paper presents a method for obtaining the spectral energy distribution of the light reflected from an object made of a specific real material and discusses a procedure for accurately reproducing the color associated with the spectral energy distribution. The model is applied to the simulation of a metal and a plastic.

A reflectance model for computer graphics

The Cambridge handbook of multimedia learning

Cybersickness is an affliction common to users of virtual environments. Similar in symptoms to motion sickness, cybersickness can result in nausea, headaches, and dizziness. With these systems becoming readily available to the general public, reports of cybersickness have increased and there is a growing concern about the safety of these systems. This review presents the current state of research methods, theories, and known aspects associated with cybersickness. Current measurements of incidence of cybersickness are questionnaires, postural sway, and physiological state. Varying effects due to display and rendering modes, such as visual display type and stereoscopic or monoscopic rendering, are compared. The known and suspected application aspects that induce cybersickness are discussed. There are numerous potential contributing application design aspects, many of which have had limited study, but field of view and navigation are strongly correlated with cybersickness. The effect of visual displays is not well understood, and application design may be of greater importance.

Review on cybersickness in applications and visual displays

Predicting the subjective evaluation of vehicle behaviour in a driving simulator

This study presents a driving simulator experiment to evaluate three different motion cueing algorithms based on model predictive control. The difference among these motion strategies lies in the type of mathematical model used. The first one contains only the dynamic model of the platform, while the others integrate additionally two different vestibular system models. We compare these three strategies to discuss the tradeoffs when including a vestibular system model in the control loop from the user's viewpoint. The study is conducted in autonomous mode and in free driving mode, as both play an important role in motion cueing validation. A total of 38 individuals participated in the experiment; 19 drove the simulator in free driving mode and the remaining using the autonomous driving mode. For both driving modes, substantial differences is observed. The analysis shows that one of the vestibular system models is suitable for driving simulators, as it thoroughly restores high-frequency accelerations and is well noted by the participants, especially those in the free driving mode. Further tests are needed to analyze the advantages of integrating the chosen vestibular system model in the control design for motion cuieng algorithms. Regarding the autonomous mode, further research is needed to examine the influence of the vestibular system model on the motion performance, as the behavior of the autonomous model may implicitly interfere with subjective assessments.

/pdf/impact-of-human-centered-vestibular-system-model-for-motion-s7nt9rkmk1.pdf

Impact of Human-Centered Vestibular System Model for Motion Control in a Driving Simulator

This paper deals with motion control for an 8degree-of-freedom (DOF) high performance driving simulator. We formulate a constrained optimal control that defines the dynamical behavior of the system. Furthermore, the paper brings together various methodologies for addressing feasibility issues arising in implicit model predictive control-based motion cueing algorithms. The implementation of different techniques is described and discussed subsequently. Several simulations are carried out in the simulator platform. It is observed that the only technique that can provide ensured closed-loop stability by assuring feasibility over all prediction horizons is a braking law that basically saturates the control inputs in the constrained form.

/pdf/feasibility-analysis-for-constrained-model-predictive-3izjq2yrob.pdf

Feasibility Analysis For Constrained Model Predictive Control Based Motion Cueing Algorithm

Simulation appears as an indispensable tool for automotive manufacturers to validate autonomous vehicle development, this latter reported to require billions of miles of driving. To involve the end users in this validation process, a project of large scale public application on smartphone allowing them to test and submit specific use cases, is presented in this paper. A first version of this application “3DAV Explore” has been released and is already available, allowing users to see in Virtual Reality traffic scenarios in subjective view from the autonomous vehicle and/or from an exterior view. This paper details more deeply the development steps and the libraries used for the second version of this application. Further development steps and implications are also detailed in the conclusion.

https://hal.archives-ouvertes.fr/hal-01933391/document

Large scale collaborative autonomous vehicle simulation and analysis using smartphones

Angular velocity perception plays an important role for a better sense of presence in driving simulators. This paper deals with the angular velocity perception threshold and sense of presence. A three degrees of freedom (DOF: roll, pitch, and heave) driving simulator, a motion tracking sensor, a driving simulation software, and self-prepared questionnaires were used. Due to the subjective assessments, there were no significant differences between static and dynamic platform types. Eight different cases were investigated with respect to visual and inertial factors (field of view (FOV) and motion platform). Subjective evaluations showed that there were no significant differences between static and dynamic conditions. Lower FOV, static platform, stereo vision condition has provided the best condition (best realism depending on objective-subjective measure relationship).

/pdf/angular-velocity-perception-threshold-and-sense-of-presence-11uuknn0q3.pdf

Andras Kemeny

Papers

Predicting the subjective evaluation of vehicle behaviour in a driving simulator

Impact of Human-Centered Vestibular System Model for Motion Control in a Driving Simulator

Feasibility Analysis For Constrained Model Predictive Control Based Motion Cueing Algorithm

Large scale collaborative autonomous vehicle simulation and analysis using smartphones

Angular Velocity Perception Threshold and Sense of Presence for a Three Degrees of Freedom (DOF). Driving Simulator in Virtual Environment