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Study on Rainfall Regional Frequency Analysis (강우 지역빈도해석의 적용성 연구)

  • Shin Hong Joon;Nam Woo Sung;Heo Jun Haeng;Kim Kyung Duk
    • Proceedings of the Korea Water Resources Association Conference
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    • 2005.05b
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    • pp.593-598
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    • 2005
  • At-site analysis is not appropriate if the record length is shorter than target return period T. If the record length is longer than 27 years, then at-site analysis may be sufficient(Institute of Hydrology, 1999). However, in such a case, regional frequency analysis is recommended for purpose of comparison. Record lengths of annual maximum rainfall data in Korea are usually shorter than 50 years. It is therefore essential to apply regional frequency analysis for estimating rainfall quantiles of more than 100 years return period. In this research, regional rainfall frequency analysis is performed for hourly rainfall data of South Korea. Homogeneous regions are idntified by clusgter analysis which is a standard method of statistical multivariate analysis for dividing a data set into groups. An appropriate distribution is chosen by goodness-of-fit test. GLO is found to be an appropriate distribution as a result of goodness-of-fit measure (Hosking & Wallis, 1997). Simulation experiments are performed to check the performance of frequency analysis techniques. The effects of discordant sites on quantiles are considered.

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Android S/W Test case Generation System using Record-PlayBack (Record-PlayBack 기반의 안드로이드 소프트웨어 테스트 케이스 생성 방안)

  • Park, Doo-Ho;Shin, Won;Kim, Tae-Wan;Chang, Chun-Hyon
    • Proceedings of the Korean Information Science Society Conference
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    • 2011.06b
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    • pp.171-174
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    • 2011
  • 최근 안드로이드 소프트웨어의 숫자가 날로 증가하고 있는 동시에 사용자들의 요구 수준도 함께 높아지고 있다. 이에 따라 소프트웨어의 품질을 높이기 위한 테스트 과정의 중요성이 두드러지고 있으며 안드로이드 소프트웨어는 GUI를 기반으로 하고 있기 때문에 현존하는 GUI테스트 기법들을 이에 적용시키는 다양한 연구가 진행되고 있다. GUI 테스트 기법 중 Record-Playback 기법은 사용자의 사용 흐름을 기록 후 재현하는 방식으로 테스트를 반 자동화함으로 테스트 과정에 소모되는 시간과 자원을 감소시키기 때문에 많은 분야에서 활용되고 있다. 하지만, 이 기법은 테스트 케이스 생성 시 테스터의 비효율적인 노동을 증가시키는 문제점이 발생하고 있으며, 또한 안드로이드 환경에 적용시키기 위해서 그 특성에 대한 고려가 필요하다. 이에 본 논문에서는 안드로이드 환경에 적합한 RPB 기반 테스트 케이스 생성 및 활용 방안에 대해 제안한다. 이는 소프트웨어 테스트에 소요되는 시간과 자원을 감소시켜 소프트웨어의 품질 향상에 도움이 된다.

A Study on the Malfunction Prevention for Transponder of Record Type Fire Alarm System (R형 자탐설비의 중계기 오동작 방지 대책에 대한 연구)

  • Yoo, Jae Ick;Jung, Jae Hee
    • Journal of the Korean Society of Safety
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    • v.29 no.5
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    • pp.54-59
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    • 2014
  • The record type receivers that are operated in large industrial sites have strength in preventing fire. However, because of its long circuit lines and multiple detectors, the receivers are vulnerable to lightning, noise, and breakdown of equipments, resulting in malfunction. In case of malfunctioning of detection circuits of main protection areas, such as electrical room and server room, potential release of gaseous extinguisher agents may lead to property and life damage. In this paper, we present the results on the characteristics of the transponder that initiates the solenoid valves, with respect to various electromagnetic and lightning inflow conditions. Based on the measured data, we analyzed the systematic problems of the transponder. In order to prevent receiver malfunctions, a sequential circuit was configured with two additional transponders and a timer. The circuit was tested with a simulator with preference and delay circuit algorithms.

Analyzing etiologic factors of Cases : Understanding Sanghanlun record of anger and sleeping disorder (황련아교탕(黃連阿膠湯)으로 호전된 3례의 병인(病因) 분석 : 분노와 수면장애에 대한 『상한론(傷寒論)』 기록의 이해)

  • Kim, Jin-A;Jo, Gang-Mun;Lee, Sung-Jun
    • 대한상한금궤의학회지
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    • v.7 no.1
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    • pp.87-106
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    • 2015
  • Objective : We analyzed 3 clinical cases to estimate the possibility of shanghanlun as a completed clinical text which has its own diagnostic system. Methods : We collected 3 cases treated by huang lian e jiao tang conducted by a practiced shanghanlun doctor and defined the conceptional meaning of each provisions by analyzing the application of them in each case. Results : Shanghanlun provisions dualized with Je Gang(提綱) and Jo Mun(條文) is the record of preceding factors which describe the phenomenon initiating the diseases. Conclusions : Rudimentarily a factor can bring about many outcomes, so if shanghanlun is structured record of the factors which can make a human sick from many diseases, it can be used as the completed clinical text only with those 113 prescriptions. Factors that shanghanlun recorded seem somewhat different from western conventional medicine because the field of each factors are very varied from biological phenomenon to psychological phenomenon. However it is not that weird because psychosomatic medicine in western conventional medicine also point out the factors come from mental, society and behavior.

The Bias Error due to Windows for the Wigner-Ville Distribution Estimation (위그너-빌 분포함수의 계산시 창문함수의 적용에 의한 바이어스 오차)

  • 박연규;김양한
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1995.10a
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    • pp.80-85
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    • 1995
  • Too see the effects of finite record on the estimation of WVD in practice, a window which has time varying length is examined. Its length increases linearly with time in the first half of the record, and decreases from the center of the record. The bias error due to this window decreases inversely proportionally to the window length as time increases in the first half. In the second half, the bias error increases and the resolution decreases as time increases. The bias error due to the smoothing of WVD, which is obtained by two-dimensional convolution of the true WVD and the smoothing window, which has fixed lengths along time and frequency axes, is derived for arbitrary smoothing window function. In the case of using a Gaussian window as a smoothing window, the bias error is found to be expressed as an infinite summation of differential operators. It is demonstrated that the derived formula is well applicable to the continuous WVD, but when WVD has some discontinuities, it shows the trend of the error. This is a consequence of the assumption of the derivation, that is the continuity of WVD. For windows other than Gaussian window, the derived equation is shown to be well applicable for the prediction of the bias error.

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A Study on the Differences of Perceptions between Practitioners and Students in Archives & Record Management on the Professionalism of Archivists (기록물관리 전문요원의 전문성에 대한 실무자와 전공학생의 인식 차이에 관한 연구)

  • Kang, Eun-Bi;Oh, Hyo-Jung;Kim, Chan-Young;Kim, Yong
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.27 no.4
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    • pp.147-173
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    • 2016
  • This study aims to examine the differences of perceptions on the professionalism of archivists between the archivists and the students majored in archives and record management. The professionalism elements required for archivist as the profession were drawn as 8 items and 29 detailed elements in total 3 fields based on the literature review and the domestic and foreign case studies. The study hypothesis was based on the extracted results. The questionnaires were composed to conduct survey for archivists and students. As a result of it, this study could confirm that differences of perceptions on the professionalism for archivists between the archivists and students exists.

A Study on the Role of Archivists in the Process of Establishing an Archives - Focuced on the case of The Korea Democracy Movement Archives (기록관(Archives) 건립과정에서 아키비스트의 역할에 관한 연구 - 민주화운동자료관 사례를 중심으로 -)

  • Jun, Myung-Hyuk;Kim, Young-Kyoung
    • The Korean Journal of Archival Studies
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    • no.3
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    • pp.65-89
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    • 2001
  • We, at The Korea Democracy Movement Archives opened temporarily at SungKongHoe University(SKHU), have currently collected about 100,000 recorded materials of democratization movement related with labor, farmer, civilian, human rights, peace, unification, young people, student and women's movements by investigating, collecting and receiving donations from civil organizations and individuals, and about 70,000 data out of this 100,000 data were converted into computer files. The Korea Democracy Movement Archives(temp) at SKHU has a significance in that it is the first archive opened by an organization. Furthermore, the opening of this Archive means the expansion of awareness on recording culture and accumulation of the achievements of the democratization movement in Korea. However, many obstacles still remain in the establishment of this Archive in a full-scale. This article examined many theoretical and realistic obstacles posed to the archivists, who are the professionals responsible for record management, in process of establishing the Archive, and the role and future perspectives of the archivists at The Korea Democracy Movement Archives(temp). The first obstacles in the process of organizing and separating the recorded materials at the Archive is a difficulty in the description of classifying the different movement organizations. The second obstacle is a difficulty in specifically applying the international standard, ISAD(G), of record description in the process of establishing the description items. Through many trials and errors, we need to try to confirm the description befitting. The Korea Democracy Movement Archives through continuous adjustment and complementary measures. The third obstacle is a difficulty in estimating the range and physical and quantitative amount of the recorded materials since the collection of recorded materials is complete. Thus, the answers to these problems lie in continuous efforts to establish a creative classification system befitting the democratization movement in Korea in the process of many trials and errors and endeavor. The evaluation classification done by archivists is a creative act forming record heritage, and archivists need to form record heritage reflecting the evaluation system of a certain period. Moreover, they transmit the shape of the current era in a maximum scale to the future by using the minimum amount of records. An archivist is responsible for two tasks, i.e., preserving a record and making other people to utilize the record by working with record. However, We, at The Korea Democracy Movement Archives(temp), have an additional task of contributing to the democratization movement in korea that has not ended by collecting, preserving and making people to utilize the fragments of memory in the recent history of Korea by establishing the Archives.

A Recovery Technique Using Client-based Logging in Client/Server Environment

  • Park, Yong-Mun;Lee, Chan-Seob;Kim, Dong-Hyuk;Park, Eui-In
    • Proceedings of the IEEK Conference
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    • 2002.07a
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    • pp.429-432
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    • 2002
  • The existing recovery technique using the logging technique in the client/sewer database system only administers the log as a whole in a server. This contains the logging record transmission cost on the transaction that is executed in each client potentially and increases network traffic. In this paper, the logging technique for redo-only log is suggested, which removes the redundant before-image and supports the client-based logging to eliminate the transmission cost of the logging record. Also, in case of a client crash, redo recovery through a backward client analysis log is performed in a self-recovering way. In case of a server crash, the after-image of the pages which needs recovery through simultaneous backward analysis log is only transmitted and redo recovery is done through the received after-image and backward analysis log. Also, we select the comparing model to estimate the performance about the proposed recovery technique. And we analyzed the redo and recovery time about the change of the number of client and the rate of updating operation.

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A Study on Growth Pattern according to Sasang Constitution (사상체질에 따른 성장패턴)

  • Kim, Na-Young;Lee, Jae-Hoon;Shin, Mi-Ran;Yoo, Jun-Sang
    • Journal of Sasang Constitutional Medicine
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    • v.22 no.3
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    • pp.122-131
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    • 2010
  • 1. Objectives: The purpose of this study is to find out the growth pattern according to Sasang Constitution. 2. Methods: One hundred forty seven students in the first grade of high school were classified into three groups(So-yangin, So-eumin, Tae-eumin) by QSCC II. We obtained the growth distance curve and growth rate, annual increment based on the Health Record according to Sasang Constitution. Health Record ranged from the first grade of the elementary school to the first grade of high school. And we calculated the Body mass index(BMI) and Mid-parential height(MPH). 3. Results: In case of Male, So-eumin and Tae-eumin showed linear growth patterns, but So-yangin showed rapid growth from 13 to 14. In case of Female, all of the groups showed similar growth pattern. But Tae-eumin showed a more growth from 8 to 9 than So-yangin groups. 4. Conclusions: Growth Pattern seemed to be different according to Sasang Constitution.

ACCURACY OF FOUR ELASTOMERIC INTEROCCLUSAL RECORDING MATERIALS (수종 고무 교합인기 재료의 정확성에 관한 연구)

  • Bae, Jeong-Sik
    • The Journal of Korean Academy of Prosthodontics
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    • v.36 no.2
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    • pp.355-365
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    • 1998
  • The purpose of this study is to evaluate the accuracy of four elastomeric interocclusal recording materials and the weight change according to different storage period (24 hours, 48hours, 7days) and different conditions (dry, wet). The techniques for establishing the intercuspal position were centic occlusion interocclusal record with four elastomeric interocclusal recording materials (Ramitec, Stat-BR, Blu-Mousse, Regisil) (experimental groups) and location of the cast in a position of maximum in-terdigitation using tactile and visual method(control group). To evaluate the accuracy of four elastomeric interocclusal recording materials, the quality of contacts between the mounted casts was compared with the results of an occlusal examination of the same subjects. The results were as follows : 1. The most accurate method of articulating study casts at the intercuspal position was by hand articulation and no significant differences in accuracy were observerd among the experimental groups. 2. In case of interocclusal records storaged in dry sealed plastic box, no significant differences in accuracy were observed among the experimental groups. 3. In case of interocclusal records storaged in water, there was significant inaccuracy in Ramitec group. 4. The biggest weight change was observed in Ramitec group in all storage conditions

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