http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
GBAS 기준국의 코드 반송파 발산 검출성능 평가를 위한 통계시험
윤영선(Youngsun Yun),김주경(Joo Kyoung Kim),조정호(Jeongho Cho),허문범(Moon-Beom Heo),남기욱(Gi-Wook Nam) 한국항공우주학회 2012 韓國航空宇宙學會誌 Vol.40 No.9
GBAS 기반의 정밀 접근 서비스를 제공하기 위해서 항행 서비스 제공 주체는 GBAS 시스템의 성능이 국제 표준에 정의된 요구 조건을 만족하는지를 확인하여 사용 승인을 획득하여야 한다. 특히 항공기 안전에 직접적으로 영향을 미치는 무결성 성능의 검증을 위해서는 무결성 위협요인 정의와 검출기법 분석 및 구현된 시스템의 검출성능 평가 등의 작업이 시스템 제작자에 의하여 수행되어야 한다. 본 논문에서는 GBAS 무결성 위협요인 중 코드 반송파 발산 현상에 대응하기 위하여 KIMS 소프트웨어에 구현된 검출기법들의 검출 성능 확인 통계시험 결과를 기술한다. 성능 확인을 위하여 개발된 분석 및 통계시험 절차를 소개하며, 절차에 따른 분석 결과 및 시험 시나리오 제작 방법, 수행된 시험의 결과를 분석하였다. 시험 결과 KIMS 소프트웨어에 구현된 검출기법들은 예측된 최소 검출가능 오차와 같은 크기의 발산이 발생하였을 때, 각 기법에 할당된 고장검출실패율 요구 조건을 만족하며 위협요인을 검출해 낼 수 있는 것을 확인하였다. In order to provide precision approach service based on GBAS, air navigation service providers should validate the GBAS system performance against international standard requirements and receive approval. The GBAS manufacturer should define integrity threat, analyze the integrity monitors and evaluate performance of the implemented monitors to verify integrity performance which is critical to the aircraft safety. This paper describes a statistical test result to evaluate performance of the code carrier divegence monitors implemented in KARI Integrity Monitor System software. The paper introduces analysis and test procedure which is developed for the performance evaluation and describes the analysis, the test scenario generation and the test results. The results show that the implemented monitors can detect the expected minimum detectable errors with satisfying the probability of missed detection requirements.
Kim, Youngsun,Jang, Ho Seong,Kim, Hyunki,Kim, Sehoon,Jeon, Duk Young American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.37
<P>We synthesized uniform CuInS2/ZnS nanocubes by adjusting reaction parameters at the ZnS growth stage. Higher temperature and zinc concentration were shown to drive resultant crystals to have cubic morphology, which could be ascribed to the facet-dependent ligand dynamics on the crystal surface and concomitantly preferred directions of crystal growth. It was found that these nanocubes exhibit sensitive responses, as of photoluminescence quenching, toward hydrogen peroxide, compared to pyramid-shaped nanocrystals. The origin of quenching was further analyzed to be the oxidation of thiolate ligands that leaves the quenching center on the surface. It was noted that the quenched photoluminescence could be fully recovered by introducing additional ligand molecules into the system. Being adopted in the shape-controlled crystal growth, the ligand-to-crystal interaction was shown to still govern the interfacial reaction, the oxidation by hydrogen peroxide, of faceted crystals in our system. It turns out that the reactivity at the crystal surface depends on the exposed facets, especially induced by shape control, and the weak ligand-binding nature of the nanocube renders it vulnerable to the surface reaction.</P>
간호대학생의 간호전문직관과 자기효능감이 임상수행능력에 미치는 영향
김영선 ( Youngsun Kim ),김향하 ( Hyangha Kim ),김정이 ( Jungee Kim ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.2
본 연구는 간호대학생을 대상으로 간호전문직관과 자기효능감이 임상수행능력에 미치는 영향을 파악하기 위한 서술적 조사연구이다. 연구대상은 J도에 소재한 J대학 간호대학생 171명으로 편의표집 하였다. 수집된 자료는 SPSS/Win 23.0 프로그램을 이용하여 빈도와 백분율, 평균과 표준편차, 피어슨 상관계수, 다중회귀분석으로 분석하였다. 연구결과 간호대학생의 임상수행능력에 대한 영향요인은 자기효능감, 자아개념 순으로 나타났다. 설명력은 55.5%였다. 따라서 간호대학생의 임상수행능력을 높이기 위해 자기효능감과 자아개념을 고려한 임상실습 프로그램 계획과 적용이 필요하다. The purpose of this study was to examine the effects of nursing professionalism and self-efficacy on clinical competency in nursing students. Participants of were 171 students of nursing science department, C university in J province, from whom this research collected data through convenient sampling. And then, the data were statistically processed using the SPSS/WIN 23.0 program, especially through Pearson’s correlation coefficient analysis and the regression analysis. As a result, it was turned out that the influence factors in nursing students’ clinical competency were both self-efficacy and self-concept of the profession which are subject to the nursing professionalism. Also, it was found that those two factors accounted in total for 55.5% of that level. Therefore I think it is necessary to plan and apply a clinical practice program in consideration of self-efficacy and self-concept of the profession in order to enhance the clinical competency in nursing students.
A Phase-Based Approach to ECM across CP in Korean
( Youngsun Kim ) 한국언어정보학회 2002 국제 워크샵 Vol.2002 No.-
ECM across a CP in Korean poses difficulties from the standpoint of the locality of A-movement/agreement. A phase-based analysis is developed which requires two steps: (i) in the embedded CP, VP/vP containing its VP-internal subject first moves to Spec-CP, which renders the subject accessible to the matrix v, in accordance with Chomsky``s Phase Impenetrability Condition; (ii) ECM takes place in a local relation between the matrix v and the embedded subject. It is shown that the otherwise puzzling fact that ECM across a CP, but not Passivization across a CP, is affected by the type of the embedded verb in Korean is accounted for in a principled way, based on the assumption that CP and vP, but not TP and VP, are phases.
Hyoid excursion during the swallow in stroke survivors
Youngsun Kim,Margaret A. Dietz,Taeok Park 한국언어재활사협회 2019 Clinical Archives of Communication Disorders Vol.4 No.3
Purpose: The purpose of the investigation was to examine whether duration, distance or velocity of hyoid excursion was associated with aspiration in post-stroke survivors. Methods: Duration, distance and velocity of hyoid excursion were calculated using videofluoroscopic swallowing examinations (VFSEs) of 39 post-stroke survivors. Statistical comparisons were made using a two-way repeated measure analysis of variance (ANOVA) with between subject variable being aspirators and non-aspirators, and within subject variable being bolus volume (5 mL and 10 mL). The significance level was set as p<0.05. Results: The duration of hyoid excursion in aspirators was significantly slower than in non-aspirators. There were no significant differences in hyoid velocity or distance between aspirators and non-aspirators. Conclusions: Slower hyoid excursion duration may put stroke survivors at risk of aspiration. It is necessary for the clinician to design the intervention strategies to compensate for or rehabilitate from slow hyoid excursion in stroke survivors.