5,594 research outputs found

    The copula and existential verbs in Qiang

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    This paper discusses the copula and existential verb constructions in Qiang, a Tibeto-Burman language of northern Sichuan, China

    Perceiving Mass in Mixed Reality through Pseudo-Haptic Rendering of Newton's Third Law

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    In mixed reality, real objects can be used to interact with virtual objects. However, unlike in the real world, real objects do not encounter any opposite reaction force when pushing against virtual objects. The lack of reaction force during manipulation prevents users from perceiving the mass of virtual objects. Although this could be addressed by equipping real objects with force-feedback devices, such a solution remains complex and impractical.In this work, we present a technique to produce an illusion of mass without any active force-feedback mechanism. This is achieved by simulating the effects of this reaction force in a purely visual way. A first study demonstrates that our technique indeed allows users to differentiate light virtual objects from heavy virtual objects. In addition, it shows that the illusion is immediately effective, with no prior training. In a second study, we measure the lowest mass difference (JND) that can be perceived with this technique. The effectiveness and ease of implementation of our solution provides an opportunity to enhance mixed reality interaction at no additional cost

    Qiang

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    Exploring Topological Environments

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    Simultaneous localization and mapping (SLAM) addresses the task of incrementally building a map of the environment with a robot while simultaneously localizing the robot relative to that map. SLAM is generally regarded as one of the most important problems in the pursuit of building truly autonomous mobile robots. This thesis considers the SLAM problem within a topological framework, in which the world and its representation are modelled as a graph. A topological framework provides a useful model within which to explore fundamental limits to exploration and mapping. Given a topological world, it is not, in general, possible to map the world deterministically without resorting to some type of marking aids. Early work demonstrated that a single movable marker was sufficient but is this necessary? This thesis shows that deterministic mapping is possible if both explicit place and back-link information exist in one vertex. Such 'directional lighthouse' information can be established in a number of ways including through the addition of a simple directional immovable marker to the environment. This thesis also explores non-deterministic approaches that map the world with less marking information. The algorithms are evaluated through performance analysis and experimental validation. Furthermore, the basic sensing and locomotion assumptions that underlie these algorithms are evaluated using a differential drive robot and an autonomous visual sensor

    Exploring Topological Environments

    Get PDF
    Simultaneous localization and mapping (SLAM) addresses the task of incrementally building a map of the environment with a robot while simultaneously localizing the robot relative to that map. SLAM is generally regarded as one of the most important problems in the pursuit of building truly autonomous mobile robots. This thesis considers the SLAM problem within a topological framework, in which the world and its representation are modelled as a graph. A topological framework provides a useful model within which to explore fundamental limits to exploration and mapping. Given a topological world, it is not, in general, possible to map the world deterministically without resorting to some type of marking aids. Early work demonstrated that a single movable marker was sufficient but is this necessary? This thesis shows that deterministic mapping is possible if both explicit place and back-link information exist in one vertex. Such 'directional lighthouse' information can be established in a number of ways including through the addition of a simple directional immovable marker to the environment. This thesis also explores non-deterministic approaches that map the world with less marking information. The algorithms are evaluated through performance analysis and experimental validation. Furthermore, the basic sensing and locomotion assumptions that underlie these algorithms are evaluated using a differential drive robot and an autonomous visual sensor

    The virtual guide: a direction giving embodied conversational agent

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    We present the Virtual Guide, an embodied conversational agent that can give directions in a 3D virtual environment. We discuss how dialogue management, language generation and the generation of appropriate gestures are carried out in our system

    Sites of Remembrance in Legazpi City, Philippines: Conservation through Cultural Heritage Tourism

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    Countries commemorate disasters to link stories of the past with the present. This linking creates shared national narratives that temporally reinforce identities across the geography of the nation and among diverse citizenry (Drozdzewski, 2019). This paper presents the mapping of the sites of remembrance in Legazpi City through Mayon Volcano Natural Park (MVNP) cultural mapping in the bid for MVNP to be included in the UNESCO's World Heritage List. The study employed the qualitative research method and purposive sampling technique utilizing the standard method and survey form from the National Commission for Culture and the Arts (NCCA). The mapping of the sites was presented through georeferencing using ArcGIS Arcmap 10.5 to visualize their exact locations. The researcher gathered the background information of the sites, stories associated with the sites, significance, and conservation. Findings revealed that the sites of remembrance were built in memory of the victims of the Mayon volcano eruption. Although the local barangay authorities perceived the potentiality of the sites for cultural heritage tourism, they were unable to present a clear conservation plan to protect these cultural assets from environmental and social degradation. The study gives light to the role of tourism in cultural heritage preservation and conservation. Future researchers may conduct a study on the memorial sites of the municipalities near the foot of Mayon that have recorded casualties in past disasters

    Vortex line representation for flows of ideal and viscous fluids

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    It is shown that the Euler hydrodynamics for vortical flows of an ideal fluid coincides with the equations of motion of a charged {\it compressible} fluid moving due to a self-consistent electromagnetic field. Transition to the Lagrangian description in a new hydrodynamics is equivalent for the original Euler equations to the mixed Lagrangian-Eulerian description - the vortex line representation (VLR). Due to compressibility of a "new" fluid the collapse of vortex lines can happen as the result of breaking (or overturning) of vortex lines. It is found that the Navier-Stokes equation in the vortex line representation can be reduced to the equation of the diffusive type for the Cauchy invariant with the diffusion tensor given by the metric of the VLR

    Spartan Daily, October 14, 1935

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    Volume 24, Issue 13https://scholarworks.sjsu.edu/spartandaily/2341/thumbnail.jp
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