http://hdl.handle.net/2027.42/60937 Thu, 20 Jun 2013 09:57:27 GMT 2013-06-20T09:57:27Z http://deepblue.lib.umich.edu:80/bitstream/id/219401/logo.gif http://hdl.handle.net/2027.42/60937 http://hdl.handle.net/2027.42/97429 Accounting for Price Dependencies in Simultaneous Sealed-Bid Auctions (appendix) Wellman, Michael; Mayer, Brandon A.; Sodomka, Eric; Greenwald, Amy Online appendix to accompany article published in the Fourteenth ACM Conference on Electronic Commerce Mon, 30 Apr 2012 00:00:00 GMT http://hdl.handle.net/2027.42/97429 2012-04-30T00:00:00Z http://hdl.handle.net/2027.42/94529 Electromagnetic Interference by Wind Turbine Generators Sengupta, Dipak; Senior, Thomas The interference produced by horizontal wind axis turbine generators on a number of electromagnetic systems has been identified and quantified. The interference to TV reception has been exhaustively studied, and a method has been developed to approximate the interference zone of a WTG. This can be used to estimate the effects of a WTG on TV reception and thereby establish minimal criteria for siting of such a machine. No significant inteference to FM broadcast reception has been found. Studies of the interference to two specific air navigation systems (VOR and DVOR) indicate that no significant degredation in the performance fo these systems should occur if the WTG is sited according to the standard guidelines established by the FAA. The performance of a repeating station of a typical microwave communication link system located in the vicinity of a WTG has been analyzed and guidelines have been developed which can aid in siting a WTG so that it produces minimum impact on the link system performance. Wed, 01 Mar 1978 00:00:00 GMT http://hdl.handle.net/2027.42/94529 1978-03-01T00:00:00Z http://hdl.handle.net/2027.42/86061 Exactly Sparse Delayed-State Filters Eustice, Ryan M.; Singh, H.; Leonard, J. J. This paper presents the novel insight that the SLAM information matrix is exactly sparse in a delayed-state framework. Such a framework is used in view-based representations of the environment which rely upon scan-matching raw sensor data. Scan-matching raw data results in virtual observations of robot motion with respect to a place its previously been. The exact sparseness of the delayed-state information matrix is in contrast to other recent feature based SLAM information algorithms like Sparse Extended Information Filters or Thin Junction Tree Filters. These methods have to make approximations in order to force the feature-based SLAM information matrix to be sparse. The benefit of the exact sparseness of the delayed-state framework is that it allows one to take advantage of the information space parameterization without having to make any approximations. Therefore, it can produce equivalent results to the “full-covariance” solution. Mon, 18 Apr 2005 00:00:00 GMT http://hdl.handle.net/2027.42/86061 2005-04-18T00:00:00Z http://hdl.handle.net/2027.42/86060 Deep Sea Underwater Robotic Exploration in the Ice-Covered Arctic Ocean with AUVs Kunz, Clayton; Murphy, Chris; Camilli, Richard; Singh, Hanumant; Bailey, John; Eustice, Ryan M.; Jakuba, Michael; Nakamura, Koichi; Roman, Chris; Sato, Taichi; Sohn, Robert A.; Willis, Claire The Arctic seafloor remains one of the last unexplored areas on Earth. Exploration of this unique environment using standard remotely operated oceanographic tools has been obstructed by the dense Arctic ice cover. In the summer of 2007 the Arctic Gakkel Vents Expedition (AGAVE) was conducted with the express intention of understanding aspects of the marine biology, chemistry and geology associated with hydrothermal venting on the section of the mid-ocean ridge known as the Gakkel Ridge. Unlike previous research expeditions to the Arctic the focus was on high resolution imaging and sampling of the deep seafloor. To accomplish our goals we designed two new Autonomous Underwater Vehicles (AUVs) named Jaguar and Puma, which performed a total of nine dives at depths of up to 4062m. These AUVs were used in combination with a towed vehicle and a conventional CTD (conductivity, temperature and depth) program to characterize the seafloor. This paper describes the design decisions and operational changes required to ensure useful service, and facilitate deployment, operation, and recovery in the unique Arctic environment. Mon, 22 Sep 2008 00:00:00 GMT http://hdl.handle.net/2027.42/86060 2008-09-22T00:00:00Z