• 디지털융복합연구
• /
• 제12권8호
• /
• pp.19-27
• /
• 2014

전통적으로 Anderson 모형은 의료 및 사회서비스 이용에 대한 예측요인을 분석하는데 적합하다는 평가를 받는다. 따라서 본 연구는 선행연구를 토대로 Anderson 모형의 선행요인(성별, 연령, 교육수준, 거주 지역, 결혼상태), 가능요인(경제상태, 건강정보 이해능력, 복지관 이용 여부), 욕구요인(만성질환 보유 여부, 도구적 일상생활수행능력, 우울) 등을 구성하여 노인들의 사회서비스 이용 예측요인을 탐색하였다. 본 연구를 위해 SPSS 18.0을 이용하였으며, 충북 지역에 거주하는 329명의 노인들을 대상으로 하였다. 본 연구의 주요 결과는 다음과 같다. 노인들의 사회서비스 이용에 가장 큰 영향을 미치는 요인은 가능요인의 건강정보 이해능력과 복지관 이용 여부로 나타났다. 그 다음으로는 욕구요인 중에서 우울 수준이 큰 영향을 미치는 것으로 나타났으며, 선행요인 중에서는 성별이 큰 영향을 미치는 것으로 나타났다. 이러한 연구결과에 기초하여 노인들의 사회서비스 이용을 활성화하기 위한 몇 가지 방안을 제시하였다.

• Communications for Statistical Applications and Methods
• /
• 제29권1호
• /
• pp.1-25
• /
• 2022

A modified Bagdonavičius-Nikulin chi-square goodness-of-fit is defined and studied. The lymphoma data is analyzed using the modified goodness-of-fit test statistic. Different non-Bayesian estimation methods under complete samples schemes are considered, discussed and compared such as the maximum likelihood least square estimation method, the Cramer-von Mises estimation method, the weighted least square estimation method, the left tail-Anderson Darling estimation method and the right tail Anderson Darling estimation method. Numerical simulation studies are performed for comparing these estimation methods. The potentiality of the new model is illustrated using three real data sets and compared with many other well-known generalizations.

• Nuclear Engineering and Technology
• /
• 제54권2호
• /
• pp.532-545
• /
• 2022

In-depth convergence analyses for neutronics/thermal-hydraulics (T/H) coupled calculations are performed to investigate the performance of nonlinear methods based on the Fixed-Point Iteration (FPI). A simplified neutronics-T/H coupled system consisting of a single fuel pin is derived to provide a testbed. The xenon equilibrium model is considered to investigate its impact during the nonlinear iteration. A problem set is organized to have a thousand different fuel temperature coefficients (FTC) and moderator temperature coefficients (MTC). The problem set is solved by the Jacobi and Gauss-Seidel (G-S) type FPI. The relaxation scheme and the Anderson acceleration are applied to improve the convergence rate of FPI. The performances of solution schemes are evaluated by comparing the number of iterations and the error reduction behavior. From those numerical investigations, it is demonstrated that the number of FPIs is increased as the feedback is stronger regardless of its sign. In addition, the Jacobi type FPIs generally shows a slower convergence rate than the G-S type FPI. It also turns out that the xenon equilibrium model can cause numerical instability for certain conditions. Lastly, it is figured out that the Anderson acceleration can effectively improve the convergence behaviors of FPI, compared to the conventional relaxation scheme.

• 한국수자원학회논문집
• /
• 제46권6호
• /
• pp.643-653
• /
• 2013

적절한 확률분포형을 결정하고 그에 따른 확률수문량을 산정하는 것은 빈도해석에서 가장 중요한 절차이며, 이를 수행하기 위해서는 경험적 확률분포에서 얻어지는 자료와 가정한 확률분포에서 얻어지는 자료의 일치 정도를 판별하는 적합도 검정을 거쳐야 한다. 지금까지 일반적으로 적용된 적합도 검정 방법은 분포형의 전체적인 적합정도를 판별하여 최근의 기상이변으로 인한 극치 사상에 대하여는 충분히 고려하지 못하고 있다. 따라서 본 연구에서는 분포형의 극치 사상에 가중치를 주는 modified Anderson-Darling(AD) 검정 방법을 3변수 Weibull 분포형에 적용하여 검정통계량 한계값과 기각력을 살펴보았으며 이를 실제자료에 적용한 결과, modified AD 검정 방법이 다른 기존의 적합도 검정보다 더 우수한 기각력을 가지고 있음을 확인하였다. 이는 앞으로 3변수 Weibull 분포형을 이용한 극치 수문량 선정에 있어 modified AD 방법이 하나의 기준으로 작용할 수 있을 것이라 판단된다.

• Experimental and Molecular Medicine
• /
• 제50권11호
• /
• pp.7.1-7.12
• /
• 2018

Recent findings from The Cancer Genome Atlas project have provided a comprehensive map of genomic alterations that occur in hepatocellular carcinoma (HCC), including unexpected mutations in apolipoprotein B (APOB). We aimed to determine the clinical significance of this non-oncogenetic mutation in HCC. An Apob gene signature was derived from genes that differed between control mice and mice treated with siRNA specific for Apob (1.5-fold difference; P < 0.005). Human gene expression data were collected from four independent HCC cohorts (n = 941). A prediction model was constructed using Bayesian compound covariate prediction, and the robustness of the APOB gene signature was validated in HCC cohorts. The correlation of the APOB signature with previously validated gene signatures was performed, and network analysis was conducted using ingenuity pathway analysis. APOB inactivation was associated with poor prognosis when the APOB gene signature was applied in all human HCC cohorts. Poor prognosis with APOB inactivation was consistently observed through cross-validation with previously reported gene signatures (NCIP A, HS, high-recurrence SNUR, and high RS subtypes). Knowledge-based gene network analysis using genes that differed between low-APOB and high-APOB groups in all four cohorts revealed that low-APOB activity was associated with upregulation of oncogenic and metastatic regulators, such as HGF, MTIF, ERBB2, FOXM1, and CD44, and inhibition of tumor suppressors, such as TP53 and PTEN. In conclusion, APOB inactivation is associated with poor outcome in patients with HCC, and APOB may play a role in regulating multiple genes involved in HCC development.

• 응용통계연구
• /
• 제22권2호
• /
• pp.237-248
• /
• 2009

신용평가 연구에서 부도와 정상의 분포함수들의 동일성을 검정하는 비모수적 방법으로 Kolmogorov-Smirnov 검정법 이외에 Clamor-Yon Mises, Anderson-Darling, Watson 검정방법을 소개한다. 부도와 정상의 분포함수들의 선형결합된 부도율의 분포함수에 관한 전체적인 정보는 파악되어 잘 알고 있다. 모집단의 분포함수를 알고 있다는 가정 하에 Clamor-Von Mises, Anderson-Darling, Watson 검정통계량의 수정통계량을 제안한다. 신용평가자료와 유사한 성격을 갖는 다양한 부도율의 확률분포로부터 스코어를 생성하여 본 연구에서 제안한 수정통계량을 비교 토론한다.

• Communications for Statistical Applications and Methods
• /
• 제26권5호
• /
• pp.431-443
• /
• 2019

Goodness-of-fit techniques are an important topic in statistical analysis. Censored data occur frequently in survival experiments; therefore, many studies are conducted when data are censored. In this paper we mainly consider test statistics based on the empirical distribution function (EDF) to test normal distributions with unknown location and scale parameters when data are randomly censored. The most famous EDF test statistic is the Kolmogorov-Smirnov; in addition, the quadratic statistics such as the $Cram{\acute{e}}r-von$ Mises and the Anderson-Darling statistic are well known. The $Cram{\acute{e}}r-von$ Mises statistic is generalized to randomly censored cases by Koziol and Green (Biometrika, 63, 465-474, 1976). In this paper, we generalize the Anderson-Darling statistic to randomly censored data using the Kaplan-Meier estimator as it was done by Koziol and Green. A simulation study is conducted under a particular censorship model proposed by Koziol and Green. Through a simulation study, the generalized Anderson-Darling statistic shows the best power against almost all alternatives considered among the three EDF statistics we take into account.

• 한국항만경제학회:학술대회논문집
• /
• 한국항만경제학회 2006년도 국제학술대회
• /
• pp.13-24
• /
• 2006

• East Asian Economic Review
• /
• 제16권3호
• /
• pp.291-314
• /
• 2012

This paper attempts to investigate to what extent English proficiency can boost international trade in services. To achieve this purpose, this paper estimates the determinants of services trade including language variables with the aggregated and disaggregated data for nine different subsectors of OECD countries. The empirical tests are based on a theory-based gravity model derived from Anderson and von Wincoop. The findings show that English proficiency has a significant influence on services trade, while other languages such as French and German have only weak and mixed effects. In particular, communication, financial, commercial, insurance, and business services are revealed to be the most impacted by the level of English proficiency. The results imply that governments can use their English policies to promote international trade in services.

• Journal of the Korean Data and Information Science Society
• /
• 제5권2호
• /
• pp.75-85
• /
• 1994

계단 충격 가속수명시험에서 통계적 추론을 위해 가정하는 수명분포에 대한 적합도검정을 Kolmogorov-Smirnov, Kuiper, Watson, Cramer-von Mises, Anderson-Darling과 같은 비모수적 검정통계량에 대하여 몬테칼로 방법을 이용한 기각치를 구하고, 검정력 측면에서 비교, 연구한다.