838 research outputs found

    VANET Applications: Hot Use Cases

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    Current challenges of car manufacturers are to make roads safe, to achieve free flowing traffic with few congestions, and to reduce pollution by an effective fuel use. To reach these goals, many improvements are performed in-car, but more and more approaches rely on connected cars with communication capabilities between cars, with an infrastructure, or with IoT devices. Monitoring and coordinating vehicles allow then to compute intelligent ways of transportation. Connected cars have introduced a new way of thinking cars - not only as a mean for a driver to go from A to B, but as smart cars - a user extension like the smartphone today. In this report, we introduce concepts and specific vocabulary in order to classify current innovations or ideas on the emerging topic of smart car. We present a graphical categorization showing this evolution in function of the societal evolution. Different perspectives are adopted: a vehicle-centric view, a vehicle-network view, and a user-centric view; described by simple and complex use-cases and illustrated by a list of emerging and current projects from the academic and industrial worlds. We identified an empty space in innovation between the user and his car: paradoxically even if they are both in interaction, they are separated through different application uses. Future challenge is to interlace social concerns of the user within an intelligent and efficient driving

    Directing Attention in an Augmented Reality Environment: An Attentional Tunneling Evaluation

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    Augmented Reality applications use explicit cuing to support visual search. Explicit cues can help improve visual search performance but they can also cause perceptual issues such as attentional tunneling. An experiment was conducted to evaluate the relationship between directing attention and attentional tunneling, in a dual task structure. One task was tracking a target in motion and the other was detection of non-target elements. Three conditions were tested: baseline without cuing the target, cuing the target with the average scene color, and using a red cue. A different color for the cue was used to vary the attentional tunneling level. The results show that directing attention induced attentional tunneling only the in red condition and that effect is attributable to the color used for the cue

    A study on image segmentation techniques used in color detection

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    to humans, an image is a meaningful arrangement of regions and objects, whereas to computers, an image is merely a random collection of pixels. This work exploits some of the techniques based on the extraction of the color of an image in the real-time environment. Image segmentation is an intense research area in Computer Vision, however, enhancements or results still on to produce accurate segmentation results for images. Relating with other surveys that compare multiple techniques, this paper takes the advantage to select of the most used technique(s), Our study may be helpful for Augmented Reality environment, object detection and tracking as well as other real -time technologies. Interested reader will obtain know ledge on various categories and types of research challenges In the image-based segmentation within the scope of colored images environments

    How I met your V2X sensor data : analysis of projection-based light field visualization for vehicle-to-everything communication protocols and use cases

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    The practical usage of V2X communication protocols started emerging in recent years. Data built on sensor information are displayed via onboard units and smart devices. However, perceptually obtaining such data may be counterproductive in terms of visual attention, particularly in the case of safety-related applications. Using the windshield as a display may solve this issue, but switching between 2D information and the 3D reality of traffic may introduce issues of its own. To overcome such difficulties, automotive light field visualization is introduced. In this paper, we investigate the visualization of V2X communication protocols and use cases via projection-based light field technology. Our work is motivated by the abundance of V2X sensor data, the low latency of V2X data transfer, the availability of automotive light field prototypes, the prevalent dominance of non-autonomous and non-remote driving, and the lack of V2X-based light field solutions. As our primary contributions, we provide a comprehensive technological review of light field and V2X communication, a set of recommendations for design and implementation, an extensive discussion and implication analysis, the exploration of utilization based on standardized protocols, and use-case-specific considerations

    Challenges in passenger use of mixed reality headsets in cars and other transportation

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    This paper examines key challenges in supporting passenger use of augmented and virtual reality headsets in transit. These headsets will allow passengers to break free from the restraints of physical displays placed in constrained environments such as cars, trains and planes. Moreover, they have the potential to allow passengers to make better use of their time by making travel more productive and enjoyable, supporting both privacy and immersion. However, there are significant barriers to headset usage by passengers in transit contexts. These barriers range from impediments that would entirely prevent safe usage and function (e.g. motion sickness) to those that might impair their adoption (e.g. social acceptability). We identify the key challenges that need to be overcome and discuss the necessary resolutions and research required to facilitate adoption and realize the potential advantages of using mixed reality headsets in transit

    Augmented and Virtual Reality for the promotion of the cultural heritage: analysis of museum mission and visitor experience

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    The thesis discusses the role of Augmented and Virtual Reality technology for the promotion of the cultural heritage, considering both the museum mission and the visitor experience. The research framework represents an integration of the Contextual Model of Learning developed in the field of Museum Visitor Studies, and the cultural-historical Activity Theory, so to consider the different human, environmental and technological dimensions that determine the visitor experience. The research includes two studies. The first study is a qualitative investigation performed at the Ara Pacis Museum in Rome, in order to explore the "design for use" and the "design in use", by collecting data through ethnographic methods and analyzing data through the Service Design Thinking methodology. The second study is an investigation of the museum audience performed using an online questionnaire, to complement and validate the results from study 1. The thesis discusses the results related to the technology as engagement factor, the artifacts ecology and the social interaction among visitors

    Augmented Reality HUDs: Warning Signs and Drivers’ Situation Awareness

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    Drivers must search dynamic and complex visual environments to perceive relevant environmental elements such as warning signs, pedestrians and other vehicles to select the appropriate driving maneuver. The objective of this research was to examine how an Augmented Reality Head Up Display (AR HUD) for warning signs affects driver Situation Awareness (SA) and attention. Participants viewed videos of real driving scenes with an AR HUDs or no display and were asked to report what elements in the driving scene attracted their attention. At the completion of the first driving video participants were given a warning sign recognition test. Participants then watched a second video and the Situation Awareness Global Assessment Technique (SAGAT), a measure of global SA was administered. Participants eye movements were recorded when watching the videos to investigate how drivers interacting with an AR HUD attend to the environment compared to drivers with no AR HUD. AR HUDs for warning signs are effective in making warning signs more attentionally conspicuous to drivers in both low and high clutter driving environments. The HUD did not lead to increased fixation duration or frequency to warning signs in many situations. However when two driving items were in sight (sign and car) and participants needed to decide where to attend, they experienced attentional tunneling. In complex driving situations participants spent a significantly longer proportion of time looking at warning signs in the HUD. In simple driving situations, AR HUDs appear to make warning signs more salient and conspicuous. However, in complex situations in high clutter driving environments AR HUDs may lead to attentional tunneling

    Evaluation of high frequency vibrator response

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    Accurate analysis of the motion of a commercial high frequency hydraulic vibrator commonly used for near-surface applications demonstrated that the rigid body assumption of the weighted-sum approximation is not valid throughout the vibrator's operational frequencies. This study reveals significant response variability across the baseplate, which is dependent on accelerometer position with respect to radial position and internal baseplate structure. Consequently, the baseplate cannot be considered a point source of propagation, which complicates optimizing source operations to increase data fidelity. In an effort to optimize the source signature approximation to increase data fidelity, simultaneous acquisition of baseplate acceleration and pressure beneath the baseplate provided a means to directly compare the response of strategically placed accelerometers to the true ground force. This study concludes that the most representative approximation occurs when multiple accelerometers are positioned on the baseplate to average the baseplate motion. In addition, this study found that the IVI Minivib I is incapable of providing measurable seismic energy at frequencies over 200 Hz due to opposing baseplate and reaction mass phase. Based on this observation, it is clear the design of the baseplate needs to be modified by adding extra weight and rigidity to the driven structure. Increasing rigidity of the baseplate will reduce source generated harmonic distortion caused by baseplate flexure resulting in a more uniform response across the baseplate and a more accurate ground force approximation. Additionally, the opposing phase relationship between the baseplate and the reaction mass could be remediated by increasing the baseplate weight resulting in an increase in energy above 200 Hz
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