• 한국기록관리학회지
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• 제18권4호
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• pp.205-229
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• 2018

본 연구의 목적은 2018년 2월 개최된 평창동계올림픽 사후관리를 위한 기록화전략을 제안하는 데 있다. 연구목적을 달성하기 위해 평창동계올림픽 사후관리 기록의 가치와 기록의 유형을 파악하고 국내와 국외에서 진행된 메가 스포츠이벤트 사후관리 사례를 선정하여 분석하였다. 이를 바탕으로 평창동계올림픽 사후관리를 위한 기록화전략으로서 3가지를 제안할 수 있다. 첫째, 기록화 대상과 주체, 주제별, 계층별 범위를 명확하게 설정한 후 사후관리를 실시해야 한다. 둘째, 제한적인 문헌기록의 보완을 위해 구술기록을 통한 사후관리를 실시한다. 셋째, 홈페이지와 온라인 플랫폼을 통한 서비스시스템을 구축하여 사후관리에 활용해야 한다. 본 연구결과는 향후 평창동계올림픽기념관 건립과 국내 메가 스포츠이벤트의 사후관리를 위한 기록화 전략 마련에 활용될 수 있을 것이다.

• 한국음향학회지
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• 제38권1호
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• pp.128-138
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• 2019

본 논문은 서로 다른 두 개의 LOFAR (LOw Frequency Analysis and Recording)그램을 융합하는 방법을 다룬다. 기존의 방법은 주파수 스펙트럼을 이용하여 LOFAR 그램을 융합하기 때문에, 시간-주파수의 2차원 정보인 토널 신호를 융합하는데 제한적인 성능을 갖는다. 제안하는 방법은 전처리 과정에서 2차원 방향성 양방향 필터링을 이용하며, 전처리된 LOFAR 그램의 국부 비등방성 비교를 기반으로 두 LOFAR 그램을 융합한다. 전처리 과정에서 잡음을 억제하고 토널을 부각시키고 나면 국부 비등방성은 토널과 잡음을 구분하기 위한 척도로 사용될 수 있다. 모의 데이터와 해상 데이터를 이용해 LOFAR 그램 융합 실험을 수행한 결과, 제안한 방법은 기존 기법에 비해 융합된 LOFAR 그램의 잡음레벨을 대등하게 하거나 감소시키는 결과를 낳으며, 융합시 토널 누락 현상을 감소시키는 것을 확인하였다.

• 디지털산업정보학회논문지
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• 제11권3호
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• pp.11-19
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• 2015

Due to recent development in mobile devices, the mobile device utilization and many related applications have been increasing. Most of initial applications on mobile devices just showed simple information, but now they processes huge data. However, smart devices have certain limitations in processing massive data. Especially, if the size of data increases, the speed of data processing adversely decreases, so the performance of programs also decreases. If hardware specification of the mobile devices is not enough to handle it, response time will be drastically delayed. To overcome these drawbacks, most of application running on mobile devices communicate with their servers to manage data. XML is a proper language for data communication to send and receive data between servers and mobile devices, because it defines rules of document's format and it is a textual data format and small-sized language. However, mobile devices have limitation such as memory, CPU and wireless network to process huge data and XML also takes a lot of time to communicate with servers and devices and handle data, so it could be overhead in service time. Binary XML is an alternative of performance improvement in data processing, which has XML's benefits and minimizes the XML size by binary coding. However, most of binaryXML which are used on applications don't fit on mobile applications. In this paper, we surveyed many kinds of binaryXML, compared merits and demerits to find a binaryXML for mobile applications. We propose how to use binary XML and implemented an electronic attendance system using binary XML to overcome the limitation of XML and to reduce the load of data communications between servers and devices.

• 한국수자원학회논문집
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• 제40권1호
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• pp.39-50
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• 2007

본 논문에서는 대수-선형 파손율 모형(log-linear ROCOF)과 와이블 파솔율 모형(Weibull ROCOF)을 이용하여 상수도 주철 배수관로의 파손율을 모형화하고, '수정된 시간 척도'를 이용하여 최적교체시기를 산정할 수 있는 방법이 개발되었다. 두 ROCOF의 모형화를 위하여 개별 관로의 파손시간을 기록한 '파손 시간자료(failure-time data)'와 일정 시간간격 사이에서 발생하는 파손횟수를 기록한 '파손 횟수자료(failure-number data)'를 이용하였고, 최대로그우도 추정값을 이용하여 두 ROCOF의 각 파손자료 유형에 대한 모형화 수행 능력을 검증하였다. 또한 두 ROCOF를 이용한 관로의 최적교체시기 방정식은 ROCOF의 매개변수 추정에 있어서 수렴성을 보장하기 위하여 '수정된 시간 척도'를 적용하여 유도하였다. 연구대상 주철 배수 관로들의 '파손 시간자료'와 '파손 횟수자료'에 두 파손율 모형을 적용시켜 본 결과 파손 시간자료를 이용할 경우 대수-선형 ROCOF가 와이블 ROCOF 보다 적합한 모형인 것으로 나타났다. 또한 두 모형 모두 '파손 시간자료'를 이용하는 것이 '파손 횟수자료'를 이용하는 것보다 모형화 수행 능력이 높아지는 것으로 나타나서, 분석에 사용된 관로의 파손율 모형화와 최적교체시기 산정을 위해서는 일정 시간간격 동안의 관로 파손횟수를 기록하는 것보다 관로의 파손시간을 기록하는 것이 더욱 우수한 모형화 결과를 낳는 것으로 나타났다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1995년도 가을 학술발표회 논문집
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• pp.15.2-22
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• 1995

Evaluating stiffness of near-surface materials has been one of the critically important tasks in many civil engineering works. It is the main goal of geotechnical characterization. The so-called deflection-response method evaluates the stiffness by measuring stress-strain behavior of the materials caused by static or dynamic load. This method, however, evaluates the overall stiffness and the stiffness variation with depth cannot be obtained. Furthermore, evaluation of a large-area geotechnical site by this method can be time-consuming, expensive, and damaging to many surface points of the site. Wave-propagation method, on the other hand, measures seismic velocities at different depths and stiffness profile (stiffness change with depth) can be obtained from the measured velocity data. The stiffness profile is often expressed by shear-wave (S-wave) velocity change with depth because S-wave velocity is proportional to the shear modulus. that is a direct indicator of stiffiiess. The crosshole and downhole method measures the seismic velocity by placing sources and receivers (geophones) at different depths in a borehole. Requirement of borehole installation makes this method also time-consuming, expensive, and damaging to the sites. Spectral-Analysis-of-Surface-Waves (SASW) method places both source and receivers at the surface, and records horizontally-propagating surface waves. Based upon the theory of surfacewave dispersion, the seismic velocities at different depths are calculated by analyzing the recorded surface-wave data. This method can be nondestructive to the sites. However, because only two receivers are used, the method requires multiple measurements with different field setups and, therefore, the method often becomes time-consuming and labor-intensive. Furthermore. the inclusion of noise wavefields cannot be handled properly, and this may cause the results by this method inaccurate. When multi-channel recording method is employed during the measurement of surface-waves, there are several benefits. First, usually single measurement is enough because multiple number (twelve or more) of receivers are used. Second, noise inclusion can be detected by coherency checking on the multi-channel data and handled properly so that it does not decrease the accuracy of the result. Third, various kinds of multi-channel processing techniques can be applied to f1lter unwanted noise wavefields and also to analyze the surface-wavefields more accurately and efficiently. In this way, the accuracy of the result by the method can be significantly improved. Fourth, the entire system of source, receivers, and recording-processing device can be tied into one unit, and the unit can be pulled by a small vehicle, making the survey speed very fast. In all these senses, multi-channel recording of surface waves is best suited for a routine method for geotechnical characterization in most of civil engineering works.

• 대한간호학회지
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• 제25권3호
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• pp.441-456
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• 1995

This study was done to determine direct and in-direct nursing time in nursing units in hospital to ap-plied computer system and expect that those results contribute to measure efficiency of nursing practice and planning of nursing manpower. The design for study was a descriptive study. The study results are as follows. 1. Patients admitted to the Internal Medicine and General Surgery units were grouped into four. Group Ⅰ, 32.9% of the total patients, consisted patients whose condition was considered minor Group Ⅱ, 26.1%, was of those whose condition was considered moderate, Group Ⅲ, 41. 8%, moderate severe and Group Ⅳ, 29.2% the most severe. 2. Nursing intervention times by care type were as follows four minutes spent for suction eight minutes, for simple position change, ten minutes, for sheet change, seven minutes for a hot or cool compress, six minutes for dressing change, four minutes for Ⅰ.M. injection, six minutes for patient health education and five minutes for body temperature check. 3. Direct care time by patient group revealed the following : Group Ⅰ rquired 191.4 minutes, Group Ⅱ required 331.1 minutes, Group Ⅲ rquired 499.4 minutes, and Group Ⅳ rquired 1328.0 minutes. 4. The ratio of time for adequate nursing care and direct care time in the Internal Medicine and Goneral Surgery units was 67.4%-83.4% and 94.7%-99.3% in the Intensie Care Unit. 5. Average daily direct care time per patient was 5.5 hours in the Internal Medicine unit and 11.5 hours in the Intensive Care Unit. 6. Time spent in indirect care was 48.3 minutes for computer recording,34.8 minutes for giving and receiving patient information for shift duty, 28.0 minutes for eating and resting time, 26.6 minutes for transfering and identifying patients, 25.6 minutes for identifying Doctor's order, 23.9 minutes for recording vital signs. 7. Time spent in indirect care was 282.2 minutes by head nurses (charge nurses), 258.7 minutes by nurses and 261.6 minutes by nurse aids. 8. The average nurse's workload was 9.3 hours and daily indirect nursing time required 46.3%-50. 5% of above mentioned workload time. .9. The average daily indirect care time per patient was expected to be 57.7 minutes in the Internal Medicine unit and 3.3 hours in the Intensive Care Unit.

• The Journal of the Acoustical Society of Korea
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• 제21권4E호
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• pp.146-155
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• 2002

We present a new technique for achieving source separation when given only a single charmel recording. The main idea is based on exploiting the inherent time structure of sound sources by learning a priori sets of time-domain basis functions that encode the sources in a statistically efficient manner. We derive a learning algorithm using a maximum likelihood approach given the observed single charmel data and sets of basis functions. For each time point we infer the source parameters and their contribution factors. This inference is possible due to the prior knowledge of the basis functions and the associated coefficient densities. A flexible model for density estimation allows accurate modeling of the observation, and our experimental results exhibit a high level of separation performance for simulated mixtures as well as real environment recordings employing mixtures of two different sources. We show separation results of two music signals as well as the separation of two voice signals.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 춘계학술대회 논문집 디스플레이 광소자 분야
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• pp.132-135
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• 2002

In this paper, a new method to implement the photopolymer-based VHOE using the optimized exposure time schedule is proposed. The cumulative grating strength dependence on the exposure energy is mathematically modeled by using the fourth-order polynomial function and then using this model, the optimized exposure-time schedule of the photopolymer for recording the given multiple gratings is calculated.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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• pp.317-320
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• 2003

In this paper, we present real-time, accurate face region detection and tracking technique for an intelligent surveillance system. It is very important to obtain the high-resolution images, which enables accurate identification of an object-of-interest. Conventional surveillance or security systems, however, usually provide poor image quality because they use one or more fixed cameras and keep recording scenes without any clue. We implemented a real-time surveillance system that tracks a moving person using pan-tilt-zoom (PTZ) cameras. While tracking, the region-of-interest (ROI) can be obtained by using a low-pass filter and background subtraction. Color information in the ROI is updated to extract features for optimal tracking and zooming. The experiment with real human faces showed highly acceptable results in the sense of both accuracy and computational efficiency.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.883-886
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• 2002

A new exposure time scheduling scheme to implement the optimized photopolymer-based VHOE is proposed and using this method, the 8-view VHOE system is experimentally developed. The CGS dependence on the exposure energy is mathematically modeled using the fourth-order polynomial function and using this model optimized exposure-time schedule for recording the given multiple gratings in the photopolymer is calculated. In addition, basing on this suggested exposure-time schedule, 8-view VHOE is finally implemented and its performance is discussed.