• Communications for Statistical Applications and Methods
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• v.17 no.5
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• pp.689-696
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• 2010

Interval-censored data are commonly found in studies of diseases that progress without symptoms, which require clinical evaluation for detection. Several techniques have been suggested with independent assumption. However, the assumption will not be valid if observations come from clusters. Furthermore, when the cluster size relates to response variables, commonly used methods can bring biased results. For example, in a study on lymphatic filariasis, a parasitic disease where worms make several nests in the infected person's lymphatic vessels and reside until adulthood, the response variable of interest is the nest-extinction times. Since the extinction times of nests are checked by repeated ultrasound examinations, exact extinction times are not observed. Instead, data are composed of two examination points: the last examination time with living worms and the first examination time with dead worms. Furthermore, as Williamson et al. (2008) pointed out, larger nests show a tendency for low clearance rates. This association has been denoted as an informative cluster size. To analyze the relationship between the numbers of nests and interval-censored nest-extinction times, this study proposes a joint model for the relationship between cluster size and clustered interval-censored failure data.

• Education of Primary School Mathematics
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• v.14 no.1
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• pp.69-79
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• 2011

The purpose of this study is to analyze 3rd, 4th and 5th graders' probability understanding and raise issues concerning instructional methods and search for the possibility of learning probability. For the purpose, a descriptive study through pencil-and-paper test regarding fairness, sample space, probability of event, probability comparison, independence and conditional probability was conducted. The following conclusions were drawn from the results obtained in this study. First, the 3rd, 4th, and 5th grade students scored the highest in the sample space questions. In descending order of skill, the students scored the highest in sample space following probability of events, fairness and probability comparison. Second, however, the level of independence understanding was low. There was no meaningful differences between grades and the conditional probability was the least understood. The independence is difficult to develop naturally according to cognitive development. The conditional probability recognizing the probability of an event changes in non-replacement situations was very difficult for these students. Third, there were significant differences between the 5th graders and the 3rd and 4th graders in the probability comparison questions. It shows that 5th graders understand the concept of proportion when they compare equal ratio probability of an event. The 3rd graers could do different ratio probability of an event more easily than equal ratio probability of an event after they were instructed on probability comparison.

• Journal of KIISE:Software and Applications
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• v.30 no.11
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• pp.1015-1024
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• 2003

In [1] we proposed a method to generate a test model (GFSM) from a set of scenarios of embedded software. Each scenario describes the interaction sequences for an external input event. Although these external events are generated and accepted alternatively and concurrently by embedded software, we considered only the alternative relations. In this paper, we describe an improved algorithm to generate GFSM from concurrent scenarios, and propose methods to reduce the number of transitions in the GFSM. The first is the synchronous interpretation of message passing instead of asynchronous one considering the real behavior of tasks in embedded software. The others apply the partial order techniques to the GFSM using independent regions. We apply the method to generate a reduced GFSM of embedded software running on a digital TV.

• The Korean Journal of Archival Studies
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• no.53
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• pp.45-77
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• 2017

This study intends to rehabilitate the memories of the social other which have been gradually forgotten in the social events overloaded with the undemocratic violence in South Korea today. This study explores a case of Yongsan Tragedy in 2009 among the most tragic events. It notes the autonomous ways in which activist artists would like to memorize the socio-historical events anew despite the emptiness of public records. In other words, this study considers the Yongsan case to be significant that a group of the public, artists, grassroots activists, religion men got together in solidarity so as to create the contested narratives countering dominant memories and thus to signify the records written by the civil society. Among others, activist artists had documented the unofficial counter-memories of socially alienated peoples in terms of planning a series of artistic events such as opening some gallery exhibitions and performance events, issuing a volume of work books, comics and photographies, online broadcasting, and directing some documentaries. Especially, this paper tends to note the documentation of on-site activist artists to record the counter-memories against social oblivion. By doing so, it finally suggests how we could document the Yongsan Tragedy both to search out the archival implications of today's art activism and to insert those artistic records into the commonly shared counter-memories in a more inclusive way.

• Journal of KIISE:Computing Practices and Letters
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• v.5 no.2
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• pp.223-235
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• 1999

본 논문에서는 HDTV 데이터를 입출력할 수 있는 고속 실시간 데이터 저장 시스템을 제안한다. 이 시스템은 ⅰ) 방대한 크기를 HDTV 데이터를 고속으로 입출력할 수 있어야 한다. ⅱ)데이타를 연속적으로 입출력할 수 있는 것 외에 데이터를 비선형적으로 랜덤하게 억세스 할 수 있어야 한다. ⅲ)실시간으로 데이터를 재생하기 위해 일정하게 주어진 시스템 입출력 속도를 항상 만족할수 있어야 한다. 이러한 조건을 만족시키기 위해서 여러 개의 하드디스크를 병렬로 연결하고 데이터들을 각각의 하드디스크에 나누어 저장하였다. 하드디스크의 입출력 성능은 하드디스크 아암의 탐색 동작에 의해 크게 좌우되므로 탐색 동작을 효과적으로 제어할 수 있는 방법이 설계되었다. 제안된 시스템은 주제어부, 데이터 분배부, 종제어부로 나뉘며 각각의 하드디스크는 독립도니 종제어부에 의해 제어된다. 제안된 시스템이 주어진 요구사항을 만족하는지를 확인하기 위하여, 제안된 시스템을 DEVS 형식론을 이용하여 구현하고 시뮬레이션 하였다. DEVS 형식론은 이산사건 시스템을 계층적이고 모듈화된 형태로 기술한다. 시뮬레이션 과정에서 발생된 사건들을 분석하였다. 그 결과 제안된 시스템이 주어진 요구사항을 잘 만족함을 보았다.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.49-79
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• 2017

본 연구는 2011년 "원자력안전법" 제정 사례에 있어 정책의제 설정 과정을 동태적으로 이해하기 위해 다중흐름모형을 활용하여 분석을 수행하였다. 연구범위는 이명박 정부와 제18대 국회임기가 겹치는 기간인 2009년부터 2011년 간 기간으로서, 동 기간은 UAE 원전수출과 후쿠시마 원전사고라는 정 반대의 초점사건이 발생하면서 두 차례 의제설정 여부를 결정하는 정책의 창이 개방되었다. 분석결과, 문제의 흐름 영역에서는 정부의 원자력 정책에 있어 진흥과 규제기능을 별도 법령으로 분리하고 독립된 예산 및 전담조직을 구성하는 체계를 구축해야 한다는 문제는 장기간 존재해왔다. 1990년대부터 소수의 법학자들을 중심으로 문제인식과 대안제시가 이뤄지는 정책의 흐름이 발전되어 왔는데, 이후 UAE 원전수출 이후 2010년에 이르러서야 본격적으로 표출집단인 관료와 국회의원을 통해 구체적 대안이 제시되었고, 2011년 후쿠시마 원전사고 직후인 5월 원자력안전법이 제정되었다. 분석결과, 2009년 UAE원전수출 이후, 수출 확대 목적으로 제시된 원자력 규제 독립 법안이 통과되지 못했던 것에 반해, 2011년 후쿠시마 이후 원자력안전법이 통과 된 이유는 대안의 가치정합성, 사회여론, 정치환경 등 정치의 흐름이 크게 작용한 것으로 분석되었다.

• Journal of Popular Narrative
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• v.26 no.2
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• pp.123-153
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• 2020

As the importance of documented fact has weakened in historical dramas, the combination with other genres has become prominent. By reviewing the way romance is dealt with in historical dramas, this research examines how the properties of historical events adopted by historical dramas are related to the motif of love, and how the narrative of love and romance contributes to the historical effects, with a focus on the television drama Mr. Sunshine. Mr. Sunshine is the first historical drama written by Kim Eun-sook, combining deliberately rearranged history with the writer's unique grammar of romance. The failed resistance movement of the righteous army in the drama is matched with the love that cannot be achieved based on self-negation. The drama, which deals with the tyranny of Japanese imperialism and the independence of Joseon, fictionalizes key characters and events, transforming the desire of love into the passion of patriotism. Romance in Mr. Sunshine serves as a catalyst for emphasizing the tragedy of historical events and reconstitutes cultural memories. In historical dramas, the fictional plot of romance leads viewers to reflect on human life in history that flows from the past to the future. How does an individual's inner feelings contribute to the historical representation? This research is significant as it is the first attempt to examine the relationship between historical drama and romance in various ways.

• Korean Journal of Psychosomatic Medicine
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• v.8 no.1
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• pp.20-30
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• 2000

Objective : This study was designed to investigate the frequencies and the relation of stressful life events and health problems and evaluate the influence of stressful life events on the physical symptoms and anxiety in adolescents. Method : Newcomb's 39-item life-event questionnaire and Newcomb's 19-item health problems questionnaire were administered to 475 adolescents. The frequencies of stressful life events and health problems which had actually occurred to them during the previous 12 months were investigated. Items of stressful life events were classified in 8 dimensional scaling factors(Family/parents, Accident/Illness, Sexuality, Autonomy, Deviance, Relocation, Distress, Items not in scales) and items of health problems were classified in 5 health problems(General, Heart and Lung, Nervous system, Anxiety, Psychosomatic symptoms) and the correlation between them was analyzed. Result : 1) The average number of events occurring during the past year for the 475 adolescents is 3(7.7%). The most frequent item of stressful life events was 'Thought about suicide' and dimensional factors of "Distress" and "Autonomy" were the most frequent life events in multidimensional sacling analysis. There were more factors of "Family/Illness" and " Autonomy" in male, while there was more factor of "Distress" in female. There were more factors of "School violence" and "Deviance" in younger students, while there were more factors of "Sexuality" and "Autonomy" in older students. 2) The most frequent item of health problem was 'excessive fatigue' and "anxiety" was most frequent health problem in multidimensional scaling analysis. There were more health problems in female than those in male. The higher grades the students became, the more health problems they have reported. 3) There was significant relationship between 7 factors of stressful life events except one factor of "Relocation" and 5 health problems. Conclusions : These findings suggest that as adolescents grow older, they are engaging in more controllable behaviors related to autonomy and sexuality and at the same time are experiencing increased difficulty with distressful or discomforting events, and their stressful life events are significantly related to decreased health and psychological functiong.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.2
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• pp.351-360
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• 2019

Recently, the use of ESS facilities has been increased under the government's energy policy and at the same time, the various accident incidents such as fire and explosion occurred. Currently the ESS is installed as integrated ESS which includes PMS(: Power Management System), However, when the accident occurs, this system has high possibilities of losing the data due to oxidization, and the administrator cannot respond promptly. Therefore, in this paper, by constructing a separate WAS and data storage, it is possible to separate the main functions of the conventional system, to enable external EMS operation, and at the same time to quickly respond to the cause and cause of the accident occurrence. We will propose the development of a standalone PMS that is possible to respond.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2001.11b
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• pp.77-81
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• 2001

본 논문은 현재 국내 디지털 오디오 방송의 잠정 표준으로 채택된 Eureka-147 시스템에서의 멀티미디어 전송 프로토콜 규약인 MOT(Multimedia Object Transfer) 프로토콜을 적용하여 멀티미디어 파일을 전송할 경우의 성능 분석 및 파라미터 최적화 방법을 제시하였다. MOT 프로토콜은 멀티미디어 파일을 전송하는 세그먼트 크기, 세그먼트 반복횟수와 같은 파라미터 설정값에 따라서 FER(File Error Ratio)이 변화하므로, 성능을 최적화하기 위한 파라미터 설정이 중요하다. 세그먼트 내에서 비트 사이의 오류 사건이 독립이라는 가정하에서 MOT 파라미터 설정값을 찾는 이론적 수식을 제안하였고, 이동 채널 환경의 시뮬레이션을 통하여 이론식과 비교하였다.