http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
컴퓨터 디스플레이 설정의 인지 공학적 개선안의 제안 및 비교평가
김경호(Kyungho Kim),김병구(Byunggu Kim),임승범(Seungbum Lim),김재영(Jaeyoung Kim),김신우(ShinWoo Kim) 한국HCI학회 2013 한국HCI학회 학술대회 Vol.2013 No.1
컴퓨터 디스플레이가 점차 다양화 되면서 이를 최적화하여 설정하는 것은 모든 사용자가 실행해야할 중요한 과제가 되었다. 본 논문에서는 기존의 운영체제에서 지원하는 컴퓨터 디스플레이 설정 기능에서 발생하는 문제점들을 분석하고 그것을 보완하기 위한 방안들을 제안하였다. 분석 결과 윈도우7의 경우 가장 널리 보급된 운영체제로써 많은 사람들에게 익숙하고 가장 짧은 단계를 거쳐 해상도 조절 기능으로 접근할 수 있었기 때문에 해상도 조절 부분에서 짧은 과제수행 시간, 적은 헛갈림 반응 수와 오류 횟수를 보였다. 반면 색 조절 과제에서는 매킨토시 OSX의 경우 해상도 조절 메뉴에서 한눈에 색상 조절 메뉴를 인지할 수 있기 때문에 OSX가 윈도우7에 비해 평균적으로 더 나은 수행을 나타내었다. 따라서 각 운영체제의 장점을 살리고 문제점을 보완하기 위한 방안으로 제안한 새로운 시스템은 윈도우 시리즈에 기반하고 있는 친숙한 메뉴 접근 단계, 색 조절 메뉴와 해상도 조절 메뉴의 근접성, 색 조절 메뉴가 제공하는 기능의 병렬적 제시로써 구성되었다. 제안한 기능을 구현한 결과 기존의 운영체제를 이용했을 때와 유사한 결과를 제공할 수 있을 뿐만 아니라 기존의 운영체제를 사용할 때 나타나는 오류와 문제점들의 보완을 통해 수행에서의 향상을 보여 그 기능이 효율적임을 보여주었다. As computer displays in the market become more diverse and sophisticated, it became an important task for every users to adjust the setting in order to make the display optimal for his or her own purpose. In this research, we analyzed existing problems with the display setting UI and procedure of the current operating systems and propose/evaluate an alternative UI which improves them. Our analyses showed that Windows 7 resulted in fastest task time, fewer confusion responses, and error in resolution setting task probably because it is by far the most widely used OS highly familiar to our users. In contrast, Macintosh OSX showed better performance in color setting task because the system shows color control menus upfront in the resolution setting stage. Hence, in order to emphasize each system"s strength and compensate their weaknesses, we designed an alternative windows-based UI where familiar menu, resolution setting options, and color control options are presented in parallel. Evaluation of our new scheme resulted in similar setting outcome yet participants showed better performance with respect to time and accuracy compared with previous Windows 7 or OSX UIs for display setting.
Kim, Young-Rok,Song, Young-Joo,Park, Jae-ik,Lee, Donghun,Bae, Jonghee,Hong, SeungBum,Kim, Dae-Kwan,Lee, Sang-Ryool The Korean Space Science Society 2020 Journal of astronomy and space sciences Vol.37 No.4
The ground tracking support is a critical factor for the navigation performance of spacecraft orbiting around the Moon. Because of the tracking limit of antennas, only a small number of facilities can support lunar missions. Therefore, case studies for various ground tracking support conditions are needed for lunar missions on the stage of preliminary mission analysis. This study analyzes the ground supporting condition effect on orbit determination (OD) of Korea Pathfinder Lunar Orbiter (KPLO) in the lunar orbit. For the assumption of ground support conditions, daily tracking frequency, cut-off angle for low elevation, tracking measurement accuracy, and tracking failure situations were considered. Two antennas of deep space network (DSN) and Korea Deep Space Antenna (KDSA) are utilized for various tracking conditions configuration. For the investigation of the daily tracking frequency effect, three cases (full support, DSN 4 pass/day and KDSA 4 pass/day, and DSN 2 pass/day and KDSA 2 pass/day) are prepared. For the elevation cut-off angle effect, two situations, which are 5 deg and 10 deg, are assumed. Three cases (0%, 30%, and 50% of degradation) were considered for the tracking measurement accuracy effect. Three cases such as no missing, 1-day KDSA missing, and 2-day KDSA missing are assumed for tracking failure effect. For OD, a sequential estimation algorithm was used, and for the OD performance evaluation, position uncertainty, position differences between true and estimated orbits, and orbit overlap precision according to various ground supporting conditions were investigated. Orbit prediction accuracy variations due to ground tracking conditions were also demonstrated. This study provides a guideline for selecting ground tracking support levels and preparing a backup plan for the KPLO lunar mission phase.
Novel Associations between Related Proteins and Cellular Effects of High-Density Lipoprotein
Seungbum Choi,Yae Eun Park,Eun Jeong Cheon,Kyeong Yeon Kim,Miso Kim,Soo-jin Ann,Hye-Min Noh,Jae Ho Lee,Chan-Joo Lee,Seung-Taek Lee,Cheolju Lee,Ji Eun Lee,Sang-Hak Lee 대한심장학회 2020 Korean Circulation Journal Vol.50 No.3
Background and Objectives: Recent studies have examined the structure-function relationship of high-density lipoprotein (HDL). This study aimed to identify and rank HDL-associated proteins involved in several biological function of HDL. Methods: HDLs isolated from 48 participants were analyzed. Cholesterol efflux capacity, effect of HDL on nitric oxide production, and vascular cell adhesion molecule-1 expression were assessed. The relative abundance of identified proteins in the highest vs. lowest quartile was expressed using the normalized spectral abundance factor ratio. Results: After adjustment by multiple testing, six proteins, thyroxine-binding globulin, alpha-1B-glycoprotein, plasma serine protease inhibitor, vitronectin, angiotensinogen, and serum amyloid A-4, were more abundant (relative abundance ratio ≥2) in HDLs with the highest cholesterol efflux capacity. In contrast, three proteins, complement C4-A, alpha-2-macroglobulin, and immunoglobulin mu chain C region, were less abundant (relative abundance ratio <0.5). In terms of nitric oxide production and vascular cell adhesion molecule-1 expression, no proteins showed abundance ratios ≥2 or <0.5 after adjustment. Proteins correlated with the functional parameters of HDL belonged to diverse biological categories. Conclusions: In summary, this study ranked proteins showing higher or lower abundance in HDLs with high functional capacities and newly identified multiple proteins linked to cholesterol efflux capacity.
Kim, Jinyeong,Kim, Seungbum,Yoon, Sangyoung,Hong, Eunsoo,Ryu, Yeonwoo Springer International 2015 Applied microbiology and biotechnology Vol.99 No.15
<P>Thermostable esterases have potential applications in various biotechnology industries because of their resistance to high temperature and organic solvents. In a previous study, we isolated an esterase from Archaeoglobus fulgidus DSM 4304 (Est-AF), which showed high thermostability but low enantioselectivity toward (S)-ketoprofen ethyl ester. (R)-ketoprofenor (S)-ketoprofenis produced by esterase hydrolysis of the ester bond of (R,S)-ketoprofen ethyl ester and (S)-ketoprofen has better pharmaceutical activity and lower side effects than (R)-ketoprofen. Therefore, we have generated mutants of Est-AF that retained high thermostability whilst improving enantioselectivity. A library of Est-AF mutants was created by error-prone polymerase chain reaction, and mutants with improved enantioselectivity were isolated by site-saturation mutagenesis. The regions of Est-AF containing amino acid mutations were analyzed by homology modeling of its three-dimensional structure, and structure-based explanations for the changes in enantioselectivity are proposed. Finally, we isolated two mutants showing improved enantioselectivity over Est-AF (ee%?=?-16.2??0.2 and E?=?0.7??0.0): V138G (ee%?=?35.9??1.0 and E?=?3.0??0.1) and V138G/L200R (ee%?=?89.2??0.2 and E?=?19.5??0.5). We also investigated various characteristics of these mutants and found that the mutants showed similar thermostability and resistance to additives or organic solvents to Est-AF, without a significant trade-off between activity and stability.</P>
Kim, Cheol,Cho, Seungbum,Kim, Sungdong,Kim, Sarah Eunkyung Electrochemical Society 2017 ECS journal of solid state science and technology Vol.6 No.12
<P>A p-type oxide is a key element for transparent thin-film transistor applications. Among the various p-type oxides currently available, SnO<SUB>x</SUB> deposited by sputtering is the subject of interest in this study for high-performance and reliable thin films. A tin target or a tin oxide target is typically used to fabricate p-type SnO<SUB>x</SUB> during sputtering. A metallic target provides easy control of various film properties and chemical compositions, while a ceramic target offers structural stability and better control of stoichiometry. To use the advantages of both metallic and ceramic targets, a composite target of Sn and SnO was devised, which may provide reliable p-type SnO<SUB>x</SUB> and better control of structural defects. We evaluated four different composition ratios of Sn+SnO targets: a 100 mol% metallic Sn target, a composite target with 50 mol% Sn powder + 50 mol% SnO powder, a composite target with 20% Sn powder + 80 mol% SnO powder, and a 100 mol% ceramic SnO target. SnO<SUB>x</SUB> films were deposited under various sputtering conditions and analyzed structurally, electrically and optically. The composite target with 20 mol% Sn was found to be a promising candidate for p-type SnO<SUB>x</SUB> films, showing >75% transmittance and high mobility up to 9.07 cm<SUP>2</SUP>V<SUP>−1</SUP>s<SUP>−1</SUP>.</P>
( Seungbum Park ),( Kyungdeuk Lee ),( Daewoong Kim ),( Junghyeon Yoo ),( Jaemin Jung ),( Kyunghwan Park ),( Sungwon Park ),( Jinhoon Kim ) 한국운동역학회 2016 한국운동역학회지 Vol.26 No.3
Objective: The aim of this study was to analyze effects of the toe-spring angle of bobsleigh shoes on start speed lap time to develop Korean-specific bobsled shoes suitable for winter environments and for domestic players on the basis of sports science and optimized biomechanical performance. Method: Seven Korean bobsleigh athletes participated in this study, with three pairs of sprint spikes from three companies (Type A, Type B, Type C). To analyze sprint lap time and forefoot bending angle for each shoe, participants were instructed to drag a sled 15 meters from the start line at a maximum sprint. forefoot bending angle was collected by a high speed camera, and lap time speed was measured. Results: Lap time for type B shoes was 3.52±0.17 sec, type A was 3.55±0.19 sec, and type C was 3.56±0.18 sec. Forefoot bending angles were: angle 1, 6.88±5.55°; angle 2, 9.23±6.38°; angle 3, 15.56±5.39°; angle 4, 9.54±3.85°; angle 5, 9.22±5.08°; angle 6, 7.66±6.44°; and angle 7, 4.30±6.24° (p<.001). Forefoot bending in angle 3 was as follows: type A, 16.47±6.01°; type B, 14.30±4.96°; and type C, 15.90±5.17°. Conclusion: Hard outsoles and midsoles are better than soft type for reduced start lap time when developing a prototype Korean bobsled shoe.