Browsing 2012 Research Day Posters by Title
Now showing items 57-60 of 60
The Use of Consumer Electronics as a Medium for Music CompositionThe Nintendo Entertainment System produces sound through the Ricoh 2z03 microprocessor. This 8-bit processor is limited to creating two square-waves, a triangle-wave, and a noise track. While the 2a03 is limited, it is what gives the NES its distinctive and memorable sound.
Using GPS as a reference frame for SAR images applied to a post eruptive period for Okmok Volcano, Aleutian Islands, AlaskaWhile high spatial coverage makes InSAR a popular tool to study active volcanoes its use can possess challenges for certain environments. Volcanoes along Alaska's Aleutian chain are difficult targets for InSAR as their seasonal snow cover causes decorrelation close to the volcanic caldera, their exposed location in the North Pacific renders them prone to severe atmospheric phase artifacts, and their location on small islands prevents the selection of suitable reference points necessary for deformation analysis. Existing GPS networks define a known reference frame in which SAR is better understood. Okmok volcano is one of the most active volcanoes in the Aleutian Island Chain and shows significant non-linear deformation behavior as it progresses through its eruption cycles. A stack of L-band imagery acquired by the SAR sensor PALSAR on board the JAXA Advanced Land Observing Satellite produced a post eruption deformation time series between August 2008 and October 2010. This data along with a merged DEM comprised of AirSAR SRTM and Worldview-1 stereo pair data, and GPS data from 3 continuous and 3 post eruption campaign sites was used for this study. In this research, a comparison and combination of InSAR and GPS time-series data will be presented aimed at the following research goals: 1) What is the accuracy and precision of InSAR-derived deformation estimates in such challenging environments; 2) How accurate can the deformation of the InSAR reference point be estimated from a joint analysis of InSAR and GPS deformation signals; 3) How non-linear volcanic deformation can be constrained by the measurements of a local GPS network and support the identification of residual atmospheric signals in InSAR-derived deformation time series. Further research into the combination of GPS and InSAR applied to the nonlinear aspect of volcanic deformation can enhance geodetic modeling of the volcano and associated eruption processes.
Using hair as an Indicator of Mercury Exposure in Sled Dogs• The Alaskan sled dog is a mixed breed that has traditionally been bred for endurance, speed and strength. This study included eight Alaskan sled dogs. • Sled dogs are found only in close connection with human populated (especially Arctic) areas and are a good example of a species that is subject to many of the same environmental factors as humans and Arctic wildlife. • One environmental factor of significant importance is mercury present in foods. Mercury is both a naturally occurring element and byproduct of human industries.
Using Multiple Regression Models to Understand the Influence of Geologic History, Topography, Island Size, Isolation and Dispersability on Plant Community Assemblage in the Western Aleutian IslandsIsland groups are often subject to habitat filters and dissimilar dispersal sources, and as a result may reflect dissimilar plant assemblages between islands. Though the Aleutian Islands have likely acted as a route for plant dispersal across the North Pacific, many continental endemics have colonized the islands but have not dispersed over the chain as a whole (Talbot, 1994). Typically, North American endemic plant species represent an increasing proportion of the flora with closer proximity to the Alaskan mainland, while Asian endemics increase in proportion towards Kamchatka (Lindroth, 1961). Using plant species occurrence data across the Western Aleutian Islands, we may examine the impact of several barriers to dispersal and flora assemblage.