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Search: authors:"Taehyun Kim"

5 papers found.
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Adaptive deactivation and zero-forcing scheme for low-complexity LDPC decoders

A modified message propagation algorithm is proposed for a low-complexity decoder of low-density parity-check (LDPC) codes, which controls the information propagated from variable and check nodes.The proposed threshold-based node deactivation for variable nodes and zero-forcing scheme for check nodes remarkably reduce decoding complexity required for similar error performance. In ...

Pre-coded LDPC coding for physical layer security

This paper examines a simple and practical security preprocessing scheme for the Gaussian wiretap channel. A security gap based error rate is used as a measure of security over the wire-tap channel. In previous works, information puncturing and scrambling schemes based on low-density parity-check (LDPC) codes were employed to reduce the security gap. Unlike the previous works, our ...

A review of silicon microfabricated ion traps for quantum information processing

currently pursuing the Ph.D. degree in the Department of Electrical and Computer Engineering at Seoul National University, Korea. Taehyun Kim received the B.S. and M.S. degrees from Seoul National University

Impaired learning and memory in CD38 null mutant mice

CD38 is an enzyme that catalyzes the formation of cyclic ADP ribose and nicotinic acid adenine dinucleotide phosphate, both of which are involved in the mobilization of Ca 2+ from intracellular stores. Recently, CD38 has been shown to regulate oxytocin release from hypothalamic neurons. Importantly, CD38 mutations are associated with autism spectrum disorders (ASD) and CD38 ...

A unified picture of breaks and truncations in spiral galaxies from SDSS and S4G imaging

The mechanism causing breaks in the radial surface-brightness distribution of spiral galaxies is not yet well known. Despite theoretical efforts, there is not a unique explanation for these features and the observational results are not conclusive. In an attempt to address this problem, we have selected a sample of 34 highly inclined spiral galaxies present in both the Sloan ...