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Oxford University Press 2013 Bioinformatics Vol.29 No.13
<P><B>Motivation:</B> Insertion of DNA segments is one mechanism by which genomes evolve. The bulk of genomic segments are now known to be transcribed into long and short non-coding RNAs (ncRNAs), promoter-associated transcripts and enhancer-templated transcripts. These various cryptic ncRNAs are thought to be dispersed in the human and other genomes by retroposition.</P><P><B>Results:</B> In this study, I report clear evidence for dissemination of cryptic ncRNAs transcribed from intronic and intergenic segments by retroposition. I used highly stringent conditions to find recently retroposed ncRNAs that had a poly(A) tract and were flanked by target site duplication. I identified 73 instances of retroposition in the human, mouse, and rat genomes (12, 36 and 25 instances, respectively). The inserted segments, in some cases, served as a novel exon or promoter for the associated gene, resulting in novel transcript variants. Some disseminated sequences showed sequence conservation across animals, implying a possible regulatory role. My results indicate that retroposition is one of the mechanisms for dispersion of ncRNAs. I propose that these newly inserted segments may play a role in genome evolution by potentially functioning as novel exons, promoters or enhancers.</P><P><B>Contact:</B> yoonsoo.hahn@gmail.com</P><P><B>Supplementary information:</B> Supplementary data are available at <I>Bioinformatics</I> online.</P>
공사현장 자재관리 자동화를 위한 영상기반 인공지능 모델개발
신윤수 ( Shin¸ Yoon-soo ),김준희 ( Kim¸ Junhee ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
Conventionally, in material management at a construction site, the type, size, and quantity of materials are identified by the eyes of the worker. Labor-intensive material management by manpower is slow, requires a lot of manpower, is prone to errors, and has limitations in that computerization of information on the identified types and quantities is additionally required. Therefore, a method that can quickly and accurately determine the type, size, and quantity of materials with a minimum number of workers is required to reduce labor costs at the construction site and improve work efficiency. In this study, we developed an automated convolution neural network(CNN) and computer vision technology-based rebar size and quantity estimation system that can quickly and accurately determine the type, size, and quantity of materials through images.
THE GEOMETRIC ALBEDO OF (4179) TOUTATIS ESTIMATED FROM KMTNet DEEP-SOUTH OBSERVATIONS
Yoonsoo P. Bach,Masateru Ishiguro,Sunho Jin,Hongu Yang,Hong-Kyu Moon,Young-Jun Choi,정영민,Myung-Jin Kim,SungWon Kwak 한국천문학회 2019 Journal of The Korean Astronomical Society Vol.52 No.3
We derive the geometric albedo of a near-Earth asteroid, (4179) Toutatis, to investigate its surface physical conditions. The asteroid has been studied rigorously not only via ground-based photometric, spectrometric, polarimetric, and radar observations but also via \textit{in situ} observation by the Chinese Chang'e-2 space probe; however, its geometric albedo is not well understood. We conducted V-band photometric observations when the asteroid was at opposition in April 2018 using the three telescopes in the southern hemisphere that compose the Korea Microlensing Telescope Network (KMTNet). The observed time-variable cross section was corrected using the radar shape model. We find that Toutatis has a geometric albedo $\pV = \pVval $, which is typical of S-type asteroids. We compare the geometric albedo with archival polarimetric data and further find that the polarimetric slope--albedo law provides a reliable estimate for the albedo of this S-type asteroid. The thermal infrared observation also produced similar results if the size of the asteroid is updated to match the results from Chang'e-2. We conjecture that the surface of Toutatis is covered with grains smaller than that of the near-Sun asteroids including (1566) Icarus and (3200) Phaethon.
Pitch Autopilot Design for Agile Missiles with Uncertain Aerodynamic Coefficients
Yoonsoo Kim,Byoung Soo Kim IEEE 2013 IEEE transactions on aerospace and electronic syst Vol.49 No.2
<P>The work presented here proposes two pitch autopilot designs for agile missiles which experience high pitch angles or angles of attack (AoA) during their manoeuvres. One great challenge pertaining to high AoA is that aerodynamic coefficients cannot be precisely predicted in a conventional wind tunnel environment. To directly address this challenge, the proposed autopilot designs (based on the integrator backstepping and H<SUB>∞</SUB>-norm minimization) do not require precise knowledge of such aerodynamic coefficients and so has a strong practical merit. Simulation results clearly testify this practical merit.</P>
Static Output Feedback Stabilization of Interconnected Systems
Yoonsoo Kim 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
This paper is concerned with the celebrated static output feedback control problem (SOFP) subject to linear constraints on control input K, e.g. bounds on control magnitude, zeros in some elements of K, etc. These constraints typically arise in the control of resource-limited systems interconnected to each other, where the local control for each system makes use of its own and neighbouring systems’ outputs only, and its magnitude is bounded. This control problem can be approached by a spectral-norm minimization technique (q-SNM), whose preliminary version was previously introduced with little mathematical justification but shown to be promising for the regular SOFP without control constraints. This paper mathematically justifies q-SNM by showing its explicit relationship with spectral radius, and extends q-SNM to accommodate various linear control constraints.
Arrayed Tip based Pattern Lithography with Built-in Capacitive Proximal Leveling Sensor
Yoonsoo Han(한윤수) 한국표면공학회 2019 한국표면공학회지 Vol.52 No.5
To increase the throughput of tip-based nanolithography (TBN), one approach is to use a large array of such tips working in parallel. It is important to maintain co-planarity between the tip array and the writing surface. A slight misalignment can cause large discrepancies of contact force and feature sizes. We report a capacitive proximity sensor built-in with the TBN array for leveling an arrayed polymer pen array. The device allows alignment between an array of writing tips and the writing substrate without contact and contamination. The angular sensitivity of the sensor is 0.05o for an array with maximum tip-to-tip separation of 100 mm.