http://smartech.gatech.edu/handle/1853/49 Research papers published by researchers associated with the Center. Search the Channel search http://smartech.gatech.edu/simple-search http://smartech.gatech.edu/handle/1853/26275 Title: Pressing: Smooth Isosurfaces with Flats from Binary Grids <br/> <br/>Authors: Chica, Antonio; Williams, Jason; Andujar, Carlos; Brunet, Pere; Navazo, Isabel; Rossignac, Jaroslaw R.; Vinacua, Alvar <br/> <br/>Abstract: We explore the automatic recovery of solids from their binary volumetric discretizations. In particular, we propose an approach, called Pressing, for smoothing isosurfaces extracted from binary volumes while recovering their large planar regions (flats). Pressing yields a surface that is guaranteed to contain the samples of the volume classified as interior and exclude those classified as exterior. It uses global optimization to identify flats and constrained bilaplacian smoothing to eliminate sharp features and high-frequencies from the rest of the isosurface. It recovers sharp edges between flat regions and between flat and smooth regions. Hence, the resulting isosurface is usually a very accurate approximation of the original solid. Furthermore, the segmentation of the isosurface into flat and curved faces and the sharp/smooth labelling of their edges may be valuable for shape recognition, simplification, compression, and various reverse engineering and manufacturing applications. http://smartech.gatech.edu/handle/1853/26172 Title: inSpace: Co-Designing the Physical and Digital Environment to Support Workplace Collaboration <br/> <br/>Authors: Voida, Stephen; McKeon, Matt; Le Dantec, Christopher; Forslund, C.; Verma, Puja; McMillan, B.; Bunde-Pedersen, J.; Edwards, Keith; Mynatt, Elizabeth D.; Mazalek, Ali <br/> <br/>Abstract: In this paper, we unpack three themes for the multidisciplinary codesign of a physical and digital meeting space environment in supporting collaboration: that social practices should dictate design, the importance of supporting fluidity, and the need for technological artifacts to have a social voice. We describe a prototype meeting space named inSpace that explores how design grounded in these themes can create a user-driven, information-rich environment supporting a variety of meeting types. Our current space includes a table with integrated sensing and ambient feedback, a shared wall display that supports multiple concurrent users, and a collection of storage and infrastructure services for communication, and that also can automatically capture traces of how artifacts are used in the space. http://smartech.gatech.edu/handle/1853/26170 Title: Advanced Auditory Menus <br/> <br/>Authors: Yalla, Pavani; Walker, Bruce N. http://smartech.gatech.edu/handle/1853/26168 Title: Simulation of Bubbles in Foam With The Volume Control Method <br/> <br/>Authors: Kim, Byungmoon; Liu, Yingjie; Llamas, Ignacio; Jiao, Xiangmin; Rossignac, Jaroslaw R. <br/> <br/>Abstract: Liquid and gas interactions often produce bubbles that stay for a long time without bursting on the surface, making a dry foam structure. Such long lasting bubbles simulated by the level set method can suffer from a small but steady volume error that accumulates to a visible amount of volume change. We propose to address this problem by using the volume control method. We track the volume change of each connected region, and apply a carefully computed divergence that compensates undesired volume changes. To compute the divergence, we construct a mathematical model of the volume change, choose control strategies that regulate the modeled volume error, and establish methods to compute the control gains that provide robust and fast reduction of the volume error, and (if desired) the control of how the volume changes over time.