• 정보처리학회논문지D
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• 제16D권5호
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• pp.691-700
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• 2009

이벤트는 환자의 증상과 같이 시간 속성을 갖는 하나의 흐름을 의미하며 인터벌 이벤트는 시작과 종료 시점에 대한 시간 간격을 갖는다. 그리고 시간 데이터마이닝에 대한 많은 연구가 있었지만 환자 이력, 구매자 이력, 로그 이력과 같은 인터벌 이벤트에 대한 지식 탐사 방법에 대한 연구는 미흡하다. 이 논문에서는 이벤트들의 인과 관계에 대한 연관 규칙을 탐사하고 이 규칙에 기반하여 결과 이벤트 발생을 예측하는 시간 데이터마이닝 방법을 제안한다. 제안 방법은 이벤트 시간 속성을 사용하여 인터벌 이벤트로 요약하고 이벤트들의 인과 관계를 탐사하여 이벤트 발생을 예측한다. 성능평가를 통하여 제안 방법은 다양한 지지도를 적용하여 발생 빈도에 상관없이 이벤트 발생에 높은 영향을 주는 의미있는 희소 관계를 발견함으로써 기존의 데이터마이닝 기법에 비하여 보다 우수한 정보를 탐사할 수 있다.

• 지역사회간호학회지
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• 제17권3호
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• pp.364-375
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• 2006

Purpose: The purpose of the study was to investigate burden and the qualify of life in caregivers who are taking care of home-based rare and incurable disease patients. Methods: The subjects of this study were 300 caregivers of rare and incurable disease patients registered at five health centers in Seoul. A survey was conducted by mail and visit in person during the period from the 25th of March to the 12th of May 2005. Collected data were analyzed through t-test, ANOVA, Pearson's correlation coefficient. Result: The mean burden of caregivers was 3.42, and the mean qualify of life of caregivers was 2.71. Burden and QoL showed significant differences according to caregivers' characteristics such as sender, age, relation to the patient, academic qualification, religion, occupation, monthly household income and perceived health condition. Caregivers' burden was in an inverse correlation with their quality of life. Conclusions: According to the results of this study, rare and incurable disease caregivers' burden and their quality of life were in a significant correlation with each other. In order to improve caregivers' quality of life by reducing their burden, we need to reestablish comprehensive policies for rare and incurable disease management including nursing intervention strategies for caregivers.

• 천문학논총
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• 제30권2호
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• pp.341-343
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• 2015

We present an analysis of the relation between star-formation (SF) and accretion luminosities of local type-2 active galactic nuclei (AGNs) at $0.01{\leq}z<0.22$. We match type-2 AGNs found in the Sloan Digital Sky Survey to current far-infrared (FIR) survey catalogues based on AKARI and Herschel. Estimating AGN luminosities from [$O{\small{III}}$]${\lambda}5007$ and [$O{\small{I}}$]${\lambda}6300$ emission lines, we find a positive linear trend between FIR and AGN luminosities over a wide dynamical range. This result appears to be inconsistent with recent reports that low-luminosity AGNs show no correlation between FIR and X-ray luminosities; this contradiction is likely due to Malmquist and sample selection biases. Moreover, we also find that pure-AGN candidates, for which the FIR radiation is thought to be AGN-dominated, show significant low-SF activities. These AGNs hosted by low-SF galaxies are rare in our sample. However, it is possible that the low fraction of low-SF AGN is caused by observational limitations, as recent FIR surveys are not sufficient to examine the population of high-luminosity AGNs hosted by low-SF galaxies.

• Journal of Trauma and Injury
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• 제28권1호
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• pp.43-46
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• 2015

Although spontaneous resolution of chronic subdural hematoma (C-SDH) in the elderly has rarely been reported, spontaneous resolution of bilateral C-SDH is very rare. Here, we report the case of a 73-year-old female patient with no significant head trauma history who had a bilateral C-SDH spontaneously resolve despite receiving only conservative treatment. However, because of a lack of detailed knowledge about the mechanisms of resolution, treatment is often limited to surgical interventions that are generally successful, but invasive and prone to recurrence. We review the literature and discuss the possible relation of C-SDH's spontaneous resolution with its clinical and radiological characteristics.

• Asian Pacific Journal of Cancer Prevention
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• 제14권5호
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• pp.2711-2715
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• 2013

Background: Cancer of the gallbladder is a relatively rare neoplasm with a poor prognosis. The exact mechanisms of its genesis are not known and very little information is available on molecular events leading to labeling this as an orphan cancer. Materials and Methods: In this prospective case control study we evaluated the expression of p16, pRb and cyclin D1 by immunohistochemistry to study the G1-S cell-cycle check point and its possible role in gallbladder carcinogenesis. A total of 25 patients with gallbladder carcinoma (group I), 25 with cholelithiasis (group II) and 10 normal controls. were enrolled Results: Cyclin D1 expression was seen in 10 (40%) patients each with carcinoma and cholelithiasis while only in 2 (20%) of the normal gallbladders but differences were not statistically significant (p value=0.488). p16 was expressed in 12% patients of carcinoma of the gallbladder and 28% of cholelithiasis, however this difference was not statistically significant (p value=0.095). Retinoblastoma protein was found to be expressed in 50% of normal gallbladders and 6 (24%) of carcinoma and 8 (32%) of gallstones. The present study failed to demonstrate any conclusive role of cyclin D1/RB/ p16 pathway in carcinoma of the gallbladder. Conclusions: The positive relation observed between tumor metastasis and cyclinD1 expression and p16 with nodal metastasis suggested that higher cyclin D1/p16 expression may act as a predictive biomarker for aggressive behavior of gallbladder malignancies.

• 천문학회보
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• 제42권2호
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• pp.41.2-41.2
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• 2017

Discovered as the second highest S/N detection of the Planck SZ survey, PLCK G287.0+32.9 is a massive galaxy cluster that belongs to a rare collection of merging clusters that exhibit two radio relics and a radio halo. A feature that makes this cluster even more unique is the separation of the radio relics with one $\sim 400$ kpc to the north-west of the X-ray peak and the other $\sim 2.8$ Mpc to the south-east. This asymmetric configuration requires a complex merging scenario. A key to gaining insight into the events that caused the formation of the merging features is to understand the dark matter mass distribution. Using a weak-lensing technique on deep Subaru and Hubble Space Telescope observations, we map the dark matter mass distribution of PLCK G287.0+32.9. Our investigation detects five significant mass structures. The mass is dominated by a primary structure that is centered near the X-ray peak of the intracluster medium. Four lesser mass structures are detected with two located within $\sim 1\arcmin$ of the primary mass structure, a third to the north-west, and a fourth near the south-east radio relic. Along with these detections, we estimate the mass of each structure and relate their distributions to the intracluster medium and galaxy distributions. In addition, we discuss the relation of the mass structures to the formation of the relics and plausible merging scenarios.

• 정보교육학회논문지
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• 제17권1호
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• pp.43-52
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• 2013

로봇은 프로그래밍 교육의 도구로서 창의적 문제해결능력과 논리적 사고력 신장에 효과적이다. 또한 학습자에게 실제적, 조작적 학습경험을 제공하므로 교과학습의 도구로 활용될 때 학습내용의 구체적 이해를 돕고 능동적인 학습참여를 이끌어 낼 수 있다. 본 연구는 초등학교 수학 수업에서 로봇의 도구적 쓰임에 주안을 두고자 한다. 따라서 로봇의 기능 분석, 기능별 교육적 활용 방안 추출 후 4학년 수학교과와 연계된 수업 액티비티를 개발하였다. 로봇활용 수학수업을 10차시 실시한 후 성취도 평가, 학생 호감도 조사하였다. 연구 결과 성취도에서 유의미한 차이는 확인되지 않았다. 하지만 설문에서 로봇이 수학 수업의 흥미와 적극적 수업참여를 이끌어내며 수학개념을 이해하는 데 도움을 준 것으로 나타났다. 면담 결과에서도 기존의 수학수업에선 찾기 힘든 역동적이고 협력적인 의사소통, 체험적, 실천적인 수업 등의 긍정적 반응이 나타났다.

• 수산해양기술연구
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• 제29권3호
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• pp.214-219
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• 1993

Counter balance valve is used as one part of hydraulic motor brake system. The function of this valve is to protect over-run or free falling of inertia load. But occasionally the brake system with counter balance valve makes some undesirable problems such as pressure surges or vibrations. These problems may hurt system safety and driver's conformability. Nevertheless, studies on dynamic characteristics of hydraulic system including counter balance valve are very rare, so further accumulation of research results are required. In this study, for the purpose of easy estimation about dynamic characteristics of hydraulic system including counter balance valve, precise formulation describing fluid dynamics and valve dynamics under various boundary conditions were made. The equations obtained in the preceding process include some parameters that must be got experimentally. Flow coefficients of valve and choke are the most significant ones among the parameters. So these parameters are obtained experimentally in this study, and experimental equations obtained from the experimental data were used for numerical calculation. The equations were analysed by numerical integration using Runge-Kutta method, because the equations contain various nonlinear terms. From the numerical analysis, it was verified that the dynamic response of counter balance valve and pressure variation at each elements can be estimated very easily. So the analysing method developed in this study enabled very easy estimating the relation between the performances of counter balance valve and various physical parameters related to the valve. Conclusively, it is said that the results obtained in this study can be used very usefully to develop a new type counter balance valve or to apply the valve to actual hydraulic system for various industrial equipments.

• Journal of Construction Engineering and Project Management
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• 제1권3호
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• pp.9-17
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• 2011

Web-based PMIS (Project Management Information System) has played significant role in construction management processes in Korea. As the use of web-based PMIS increases, regular quality assessment to identify user's requirements is necessary. However, there have been rare research efforts for quality assessment of web-based PMIS. This study aims to assess the quality of web-based PMIS, especially ASP-PMIS (Application Service Provider based PMIS) that is widely used in Korean construction industry. The assessment factors of ASP-PMIS quality were adopted from previous research and empirically confirmed using exploratory factor analysis. ISA (Importance-Satisfaction Analysis), which is a variation of original IPA (Importance-Performance Analysis), were selected for the assessment and analysis method in this research. A total of 253 completed questionnaires, composed of 23 assessment items, were collected from the ASP-PMIS users in Korea (construction managers and constructors), and they were used to analyse the quality of the systems. Some possible contributions of this research are: it introduces a simple and easy-to-use tool for assessing the quality of ASP-PMIS with a set of quality assessment factors that are selected from previous researches and empirically tested; it provides the quality assessment results of ASP-PMIS in Korea so that ASP-PMIS providers in Korea can understand the users' opinion on their systems; it also identified that the urgent factors that require immediate attention to improvement. However, further researches are to be required on the following areas: enhancing the quality assessment factors in terms of their relation to the success of ASP-PMIS and to the users' performance; assessing and analyzing the quality of individual ASP-PMIS; establishing continuous improvement systems institutionally and instrumentally.

• 한국콘텐츠학회논문지
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• 제17권5호
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• pp.174-181
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• 2017

일상생활에 있어서 인간의 감정을 자극하는 색채는 애니메이션제작에 있어서 중요한 요소 중 하나이다. 색채 연구는 주로 애니메이션 제작에 있어서의 중요성 및 속성에 관련하여 활발하게 이루어져 왔다. 그러나 민족적 특성에 따른 색채에 대한 선호도 연구는 매우 드물다. 본 연구에서는 한국과 중국인의 전통색채에 대한 선호도 차이를 확인하고자 설문조사를 통해 SPSS 통계 패키지를 이용하여 실증적 분석을 실시하였다. 그 결과 한국과 중국 두 집단 모두에서 전통색채인 오색 중 빨강색이 다른 색보다 선호도가 높았으나, 한국과 중국인들이 빨강색을 선호하더라고 빨강색에 대한 선호도의 정도가 다름을 보였다. 또한 10가지 빨강색 중에서 한국인과 중국인의 선호하는 빨강색이 다르게 나타났다. 이러한 결과에 따라 중국 애니메이션 제작에 참여하고자하는 한국과 중국의 애니메이션 제작자는 애니메이션 시장과 관객의 특성을 고려하여 색채를 선택하여야 함을 시사한다.