Minkyu kim

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We investigate the problem of integrating network coding into heterogeneous wireless networks where a number of coding nodes are to be placed among legacy nodes that do not handle network coding operations well. In particular, we seek to understand better the following questions: 1) how many coding nodes are needed, 2) where should the coding nodes be(More)
We describe an algorithm for indoor mobile robot navigation using wireless sensor network. In our navigation system, a robot can navigate autonomously without the need for a map, a compass, or GPS. We use only several sensor nodes with ultrasonic sensors. Sensor nodes are deployed in an indoor environment and each sensor node has routing paths to all(More)
This paper addresses the problem of predicting future image popularity on social networks by considering the changes of image popularity over time. For this problem, we collect information about an image within an hour of upload and keep track of its popularity for one month to predict its future popularity (e.g., after a day, a week, a month). For the(More)
A simple approach to enhancing the activity and stability of organophosphorus hydrolase (OPH) is developed based on interactions between the hydrophobic poly(propylene oxide) (PPO) block of amphiphilic Pluronics and the enzyme. This strategy provides an efficient route to new formulations for decontaminating organophosphate neurotoxins.
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