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—This paper deals with the design of time-invariant memoryless control policies for robots that move in a finite two-dimensional lattice and are tasked with persistent surveillance of an area in which there are forbidden regions. We model each robot as a controlled Markov chain whose state comprises its position in the lattice and the direction of motion.(More)
Kai Wang discussed OpenCount (code.google.com/p/ opencount), an open-source software project to productively combine human cognition with machine functionality for the purpose of tabulating scans of paper ballots. The design was motivated by a need to go beyond what software can do to interpret interesting cases, such as poor markings and erasure marks.(More)
Toxoplasma gondii, the most common parasitic infection of human brain and eye, persists across lifetimes, can progressively damage sight, and is currently incurable. New, curative medicines are needed urgently. Herein, we develop novel models to facilitate drug development: EGS strain T. gondii forms cysts in vitro that induce oocysts in cats, the gold(More)
This paper studies how to provide support for ballot-level post-election audits. Informed by our work supporting pilots of these audits in several California counties, we identify gaps in current technology in tools for this task: we need better ways to count voted ballots (from scanned images) without access to scans of blank, unmarked ballots; and we need(More)
Currently, mobile phones are the primary method of navigation. However, indoor positioning and navigation poses a unique problem because the Global Positioning System (GPS) satellites normally used to navigate oudoors have limited use indoors. One solution is using Wifi access points as anchors, measuring the signal strength and calulating position using(More)
OBJECTIVE The concept of neuromodulation via the use of spinal cord stimulators (SCS) was first established over forty years ago. Since then, its popularity has grown as numerous studies have demonstrated its utility to reduce chronic pain, improve patient function, and reduce long-term health care costs. The aim of this study was to update the pain(More)
This paper presents a method for the design of time-invariant memoryless control policies for robots tasked with persistent surveillance of an area in which there are forbidden regions. We model each robot as a controlled Markov chain whose state comprises its position on a finite two-dimensional lattice and the direction of motion. The goal is to find the(More)
Luis Obispo is an on-campus laboratory where 5th through 8th grade students are taught by undergraduates who may be planning a careers in teaching. The two populations-elementary students and undergraduates-are equally important in the process. Since 2008, the lab has seen over 4000 elementary and junior high students and over 100 undergrads have(More)
Optical scan ballot systems are widely used in elections today. However, deployed optical scan systems may not always interpret write-in votes correctly. For instance, if a voter writes in a name but forgets to shade in the corresponding voting target, an optical scanner may not detect the write-in, which could lead to a lost vote. In this paper, we study(More)
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