6 Result(s)
within
Sangwoo Lee
Engineering
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Article
Transportation Mode Detection by Using Smartphones and Smartwatches with Machine Learning
Transportation Mode Detection (TMD) is important in planning new transportation projects as well as improving existing ones. Therefore, this study aims to develop predictive modes of transportation through the...
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Article
Pascal’s triangle-based range-free localization for anisotropic wireless networks
This paper introduces a Pascal’s triangle model to draw the potential locations and their probabilities for a normal node given the hop counts to the anchors according to the extent of detour of the shortest p...
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Article
Open AccessMultihop range-free localization with approximate shortest path in anisotropic wireless sensor networks
This paper presents a multihop range-free localization algorithm that tolerates network anisotropy with a small number of anchors. A detoured path detection is proposed to detect if the shortest path between n...
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Article
Open AccessWireless sensor network localization with connectivity-based refinement using mass spring and Kalman filtering
Since many range-free localization algorithms depend on only a few anchors and implicit range estimations, they produce poor results. In this article, we propose a distributed range-free algorithm to improve l...
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Article
Free-Space Optical Communications with Channel Shortening Filter and Viterbi Equalizer
This paper is about signal processing techniques for airborne free-space optical (FSO) wireless communications through clouds. FSO channel is known to be accompanied by multi-scattering, which causes severe in...
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Chapter and Conference Paper
Extension of Surface/Bulk Micromachining: One-Mask Fabrication Technology Enabling the Integration of 6-DoF Inertial Sensors on a Single Wafer
In this paper, a new technology that enables the fabrication of single-crystal silicon microstructures capable of detecting the vertical motion without a bottom electrode is presented. The vertical-motion sens...
