PseudoViewer3: generating planar drawings of large-scale RNA structures with pseudoknots.

Byun, Yanga,Han, Kyungsook Oxford University Press 2009 Bioinformatics Vol.25 No.11

<P>MOTIVATION: Pseudoknots in RNA structures make visualization of RNA structures difficult. Even if a pseudoknot itself is represented without a crossing, visualization of the entire RNA structure with a pseudoknot often results in a drawing with crossings between the pseudoknot and other structural elements, and requires additional intervention by the user to ensure that the structure graph is overlap-free. Many programs such as web services prefer to obtain an overlap-free graph in one-shot rather than get a graph with overlaps to be edited. There are few programs for visualizing RNA pseudoknots, and PseudoViewer has been the almost only program that automatically draws RNA secondary structures with pseudoknots. The previous version of PseudoViewer visualizes all the known types of RNA pseudoknots as planar drawings, but visualizes some hypothetical pseudoknots as non-planar drawings. RESULTS: We developed a new version of PseudoViewer for efficiently visualizing large RNA structures with any types of pseudoknots, both known and hypothetical, as planar drawings in one-shot. It is about 10 times faster than the previous algorithm, and produces a more compact and aesthetic structure drawing. PseudoViewer3 supports both web services and web applications. AVAILABILITY: The new version of PseudoViewer, PseudoViewer3, is available at (http://pseudoviewer.inha.ac.kr).</P>

Numerical simulation of unsteady galloping of two-dimensional iced transmission line with comparison to conventional quasi-steady analysis

Xiongjun Yanga,Ying Lei,Jianguo Zhang 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.75 No.4

Most of the previous works on numerical analysis of galloping of transmission lines are generally based on the quasi-steady theory. However, some wind tunnel tests of the rectangular section or hangers of suspension bridges have shown that the galloping phenomenon has a strong unsteady characteristic and the test results are quite different from the quasi-steady calculation results. Therefore, it is necessary to check the applicability of the quasi-static theory in galloping analysis of the ice-covered transmission line. Although some limited unsteady simulation researches have been conducted on the variation of parameters such as aerodynamic damping, aerodynamic coefficients with wind speed or wind attack angle, there is a need to investigate the numerical simulation of unsteady galloping of two-dimensional iced transmission line with comparison to wind tunnel test results. In this paper, it is proposed to conduct a two dimensional (2-D) unsteady numerical analysis of ice-covered transmission line galloping. First, wind tunnel tests of a typical crescent-shapes iced conductor are conducted firstly to check the subsequent quasi-steady and unsteady numerical analysis results. Then, a numerical simulation model consistent with the aeroelastic model in the wind tunnel test is established. The weak coupling methodology is used to consider the fluid-structure interaction in investigating a two-dimension numerical simulation of unsteady galloping of the iced conductor. First, the flow field is simulated to obtain the pressure and velocity distribution of the flow field. The fluid action on the iced conduct at the coupling interface is treated as an external load to the conductor. Then, the movement of the conduct is analyzed separately. The software ANSYS FLUENT is employed and redeveloped to numerically analyze the model responses based on fluid-structure interaction theory. The numerical simulation results of unsteady galloping of the iced conduct are compared with the measured responses of wind tunnel tests and the numerical results by the conventional quasi-steady theory, respectively.

An Empirical Investigation of Mediation Effects between Information Communication Technology Implementation and Firm Performance: Role of Knowledge Absorptive Capacity and Knowledge Management Capability

Kyung Hoon Yanga,Chulmo Koob,Chang E. Koh,Dae-Yong Lee 한국경영정보학회 2008 한국경영정보학회 학술대회논문집 Vol.2008 No.-

아동의 기질과 부모의 양육행동에 따른 아동의 어휘능력 종단연구 : 부모 양육행동의 매개효과 검증

양윤희(Yoonhee Yanga),임동선(Dongsun Yimb),오수진(Soojin Ohb),강민지(Minji Kang) 한국언어청각임상학회 2021 Communication Sciences and Disorders Vol.26 No.4

배경 및 목적: 본 연구에서는 3세 시기 영유아의 선천적 기질이 후천적 환경으로서의 부모 양육행동을 매개로 하여 학령기로 들어가는 아동이 만 7세가 되었을 때의 어휘능력을 유의하게 설명하는지 알아보고자 하였다. 방법: 한국아동패널(panel.kicce.re.kr)의 영유아기에 해당하는 4차년도(3세) 데이터와 초등학령기에 진입하는 첫 해인 8차년도(7세) 아동의 수용 및 표현 어휘능력(REVT; Kim et al., 2009)을 바탕으로 어휘능력변화에 따른 네 집단으로나누어살펴보았다. 분석에는 카이스퀘어(chi-square) 검정, 피어슨의 적률상관계수(Pearson’s Correlation Coefficient), 구조방정식(Structural equation)이 사용되었다. 결과: 1) 아동 기질 유형에 의한 4개 그룹 간 통계적으로 유의한 차이는 없었으며, 양육행동 유형에 의해 4개 그룹 간 통계적으로 유의한 차이가 있었다. 2) 그룹 1 (TD → TD)에서는 7세어휘와 3세 양육행동 사이에 유의한 상관관계가 있었다. 또한, 7세 시기에 어휘의 지연을 보인 그룹 2와 4는 3세 시기의 정서적 기질이 7세 어휘와 상관이 있다는 것을 보여주었다. 3) 그룹 1에서는 3세 시기의 정서성과 사회성이 부모의 통제된 양육행동을 매개하여 7세 시기의 어휘능력을 유의하게 설명하는 것으로 나타났다. 논의 및 결론: 본 연구는 부모의 사회적 양육행동이 3세 때 어휘 지연을 보인 아동의 어휘발달에 긍정적인 영향을 미친다는 것을 확인하였다. 또한, 3세와 7세 시기에 모두 정상적인 어휘발달을 보인 그룹 1의 어휘 예측모델이통계적으로유의함을검증하였다. Objectives: This study aimed to help the understanding of children’s temperament and parenting behavior by examining how the temperament and parenting of 3-year-olds af-fect the vocabulary development of 7-year-old children entering school age. Methods: The study group consisted of a total of four groups based on the scores of the Receptive and Expressive Vocabulary Test (REVT; Kim et al., 2009). The dataset was obtained through the Panel Study on Korean Children. Results: 1) There was no statistically significant difference between the four groups in the distribution pattern of children’s temperament type, how-ever there was a statistically significant difference between the four groups in the distribu-tion pattern by parenting behavior type. 2) In Group 1, there was a significant positive cor-relation between vocabulary at 7 years of age and parenting behavior of 3 years olds. In addition, Group 2 and 4, which showed a delay in vocabulary at the age of 7 years, showed that the emotional temperament of 3-year-old children was correlated with their 7-year-old vocabulary. 3) In Group 1, It was found that the emotional (negative) and sociality of children at the age of 3 significantly explained the vocabulary ability at the age of 7 by me-diating the parent’s didactic parenting behavior. Conclusion: This study confirmed that the vocabulary prediction model of Group 1, which showed normal vocabulary development in both 3-year-olds and 7-year-olds, was statistically significant.

대면적/단결정 Cu 박판을 이용한 대면적/단결정 hBN 합성

양혜원 ( Hye-won Yanga ),이창훈 ( Chang-hoon Leeb ),최병상 ( Byung-sang Choia ) 조선대학교 공학기술연구원 2022 공학기술논문지 Vol.15 No.1

A large area (20 mm × 20 mm) of single-crystalline monolayer hBN without any microscopic defects (grain boundaries, twins, etc.) was successfully synthesized by MOCVD at little above the atmospheric pressure (770 torrs). It was primarily possible due to utilizing the large area and single-crystalline Cu as a substrate prepared by a contactless heat treatment method to prevent any heat-related stress to the specimen. With carefully controlled and well-organized experiments, it was found that a slow increase in temperature is more critical than long-time heat treatment. Secondly, heat treatment at 1083℃ after a quick temperature reduction from 1084℃ to 1083℃ within 1 min is another key condition to obtain a smooth surface for the growth of single-crystalline Cu without any defects. Microstructural studies of synthesized hBN were carried out by X-ray diffraction, optical microscopy, scanning electron microscopy, and transmission electron microscopy.

Application of wavelet transform for the impulse response of pile

Sheng-Huoo Ni,Yu-Zhang Yanga,Chia-Rong Lyu 국제구조공학회 2017 Smart Structures and Systems, An International Jou Vol.19 No.5

The purpose of this paper is to study the capabilities of the impulse response method in length and flaw detecting for concrete piles and provide a suggested method to find small-size flaws in piles. In this work, wavelet transform is used to decompose the recorded time domain signal into a series of levels. These levels are narrowband, so the mix of different dominant bandwidths can be avoided. In this study, the impulse response method is used to analyze the signal obtained from the wavelet transform to improve the judgment of the flaw signal so as to detect the flaw location. This study provides a new way of thinking in non-destructive testing detection. The results show that the length of a pile is easy to be detected in the traditional reflection time or frequency domain method. However, the small flaws within pile are difficult to be found using these methods. The proposed approach in this paper is able to greatly improve the results of small-size flaw detection within piles by reducing the effects of any noise and clarifying the signal in the frequency domains.

Chromium(VI) Adsorption Behavior of Silk Sericin Beads

( Hyo Won Kwaka ),( Ye Sol Yanga ),( Moo Kon Kima ),( Jeong Yun Leea ),( Haesung Yuna ),( Min Hwa Kima,),( Ki Hoon Lee ) 한국잠사학회 2013 International Journal of Industrial Entomology Vol.26 No.1

Silk sericin (SS) has been fabricated into beads using a 1 M LiCl/DMSO solvent and utilized as a heavy metal adsorbent. Among the various heavy metals, we targeted Cr(VI) for adsorption using SS beads and found that its adsorption depended on the coagulant used for the fabrication of the SS beads. When methanol was used as a coagulant, the beads had a better adsorption capacity than when ethanol was used except at pH 1. The adsorption behavior of Cr(VI) on the SS beads followed the BET isotherm. The maximum adsorption capacity was 33.76 mg/g at pH 2. The adsorption of Cr(VI) was confirmed by FT-IR and EDS analyses. Finally, the desorption was carried out using NaOH solution, and it was found that 73.19% of the adsorbed Cr(VI) could be detached.

Measuring abutment convergence angles using stereovision dental image processing system

Jai-Bong Lee,Sung-Hun Kim,In-Sung Yeo,Jung-Suk Han,Ji-Man Parka,Hong-Seok Yanga 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.4

PURPOSE The purpose of this study was to develop a dental image processing system using a three-dimensional (3D) camera and stereovision technology. The reliability of the system for measuring axial wall convergence angles was evaluated. MATERIALS AND METHODS The new system predicted 3D coordinate points from 2D images and calculated distances and angles between points. Two examiners measured axial wall convergence angles for seven artificial abutments using a traditional tracing-based method (TBM) and the stereovision-based method (SVBM). Five wax abutment models of simplified abutment forms were made and axial wall convergence angles of wax models were measured by both methods. The data were statistically analyzed at the level of significance, 0.05. RESULTS Intraclass correlation coefficients showed excellent intra-examiner and inter-examiner reliabilities for both methods. Bland-Altman plots and paired t-tests showed significant differences between measurements and true values using TBM; differences were not significant with SVBM. CONCLUSION This study found that the SVBM reflected true angle values more accurately than a TMB and illustrated an example of 3D computer science applied to clinical dentistry.