Nathan Andrysco

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The layout of an urban space is a complex collection of man-made structures arranged in parcels, city blocks, and neighborhoods. An editor for interactively reconfiguring city layouts exploits geographical information system (GIS) data and provides tools to expand, scale, replace, and move parcels and blocks while efficiently exploiting their connectivity(More)
T he problem of human-induced climate change has emerged as one of the grand challenges facing humanity. Advances in scientifi c understanding in the past 20 years have confi rmed the fact of climate change and its likely acceleration , driven primarily by rising carbon dioxide (CO2) levels—mostly from fossil-fuel combustion. We must reduce CO2 emissions to(More)
Most visualizations produced in academia or industry have a specific niche audience that is well versed in either the often complicated visualization methods or the scientific domain of the data. Sometimes it is useful to produce visualizations that can communicate results to a broad audience that will not have the domain specific knowledge often needed to(More)
We propose a new data representation for octrees and kd-trees that improves upon memory size and algorithm speed of existing techniques. While pointerless approaches exploit the regular structure of the tree to facilitate efficient data access, their memory footprint becomes prohibitively large as the height of the tree increases. Pointer-based trees(More)
Climate Change has emerged as one of the grand global challenges facing humanity. The dominant anthropogenic greenhouse gas that seems to be contributing to the climate change problem, carbon dioxide (CO 2), has a complex cycle through the atmosphere, oceans and biosphere. The combustion of fossil fuels (power production , transportation, etc.) remains the(More)
The problem of human-induced climate change has emerged as one of the grand challenges facing humanity. Advances in scientific understanding in the past 20 years have confirmed the fact of climate change and its likely acceleration, driven primarily by rising carbon dioxide (CO<sub>2</sub>) levels mostly from fossil-fuel combustion. We must reduce(More)
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