• 대한예방한의학회지
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• 제12권2호
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• pp.169-183
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• 2008

This study was carried out to examine the attitude and recognition of oriental medical doctors on alternative medicine, which is increasingly used across the country. The data were collected from 264 oriental medical doctors who were working in oriental medical clinics in Daegu City, Gyeongbuk Province, using self-administered questionnaire from 1 March to 15 April 2007. Generally, the respondents have some positive attitude and recognition on alternative medicine including knowledge, interest and usefulness, efficacy of alternative medicine. However, they have some negative view on the expense of alternative medicine. And they also thought that introducing alternative medicine in their clinics was needed for better treatment and actually about 70% of the respondents recommended or applied alternative medicine to their patients. Around 40% of the respondents did not have the chance of education on alternative medicine officially. About 60% of the respondents thought that the oriental medical school was the best institute to provide the education of alternative medicine, followed by the oriental medical doctors's association. For the development of alternative medicine, they thought that the scientific research on alternative medicine by oriental medical doctors and professionals was highly needed.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 추계학술대회
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• pp.114-117
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• 1996

In this study, remote articulation training system which connects the hearing disabled trainee and the speech therapist via B-ISDN is introduced. The hearing disabled does not have the hearing feedback of his own pronunciation, and the chance of watching his speech organs' movement trajectory will offer him the self-training of articulation. So the system has two purposes of self articulation training and trainer's on-line checking in remote place. We estimate the vocal tract articulatory movements from the speech signal using inverse modelling and display the movement trajectory on the sideview of human face graphically. The trajectories of trainees' articulation is displayed along with the reference trajectories, so the trainee can control his articulating to make the two trajectories overlapped. For on-line communication and ckecking training record, the system has the function of video conferencing and transferring articulatory data.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.367-367
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• 2013

Commercial applications of indium tin oxide (ITO) can be separated into two useful areas. As it is perceived to bear electrical properties and optical transparency at once, its chance to apply to promising fields, usually for an optical device, gets greater in the passing time. ITO is one of the transparent conducting oxides (TCO), and required to carry the relative resistance less than $10^{-3}{\Omega}$/cm and transmittances over 80 % in the visible wavelength of light. Because ITO has considerable refractive index, there exist applications for anti-reflection coatings. Anti-reflection properties require gradual change in refractive index from films to air. Such changes are obtained from film density or nano-clustered fractional void. Glancing angle deposition (GLAD) method is a well known process for adjusting nanostructure of the films. From its shadowing effects, GLAD helps to deposit well-controlled porous films effectively. In this study, we are comparing the reference sample to samples coated with controlled ITO multilayer accumulated by an e-beam evaporation system. At first, the single ITO layer samples are prepared to decide refractive index with ellipsometry. Afterwards, ITO multilayer samples are fabricated and fitted by multilayer ellipsometric model based on single layer data. The structural properties were measured by using atomic force microscopy (AFM), and by scanning X-ray diffraction (XRD) measurements. The ellipsometry was used to determine refractive indices and extinction coefficient. The optical transmittance of the film was investigated by using an ultraviolet-visible (UV-Vis) spectrophotometer.

• 한국전산유체공학회지
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• 제2권1호
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• pp.117-128
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• 1997

Effects of dam and weir on the fluid flow and behavior of inclusions in the continuous casting tundish have been studied using the CFD (Computational Fluid Dynamics) technique. Inclusions affecting the quality of steel products have been considered to be passive: the fluid flow has been obtained for unstaggered grid points defined on body-fitted generalized cuvilinear coordinates with no attention on inclusions, and the spatial propagation of inclusions has been determined by using the flow field data. The result show that the dam and weir direct the flow to the free surface and increase the residence time of inclusions significantly, and thereby that inclusions have much more chance to be floated to the free surface of the tundish where it is eliminated. It is also found that they offer more margin on the geometric design of exit nozzles connected to moulds. This finding is particularly important for twin casting operations where the quality of steel products from the two moulds be kept uniformly.

• 산업경영시스템학회지
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• 제37권4호
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• pp.24-34
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• 2014

In order to manage essential parts that are required for the repairable parts services performed at the military maintenance depots, the United States Air Force developed the Repairability Forecasting Model (RFM). In the RFM, if the requirements of the parts are assumed to follow the normal probability distribution after applying means from the past data to the replacement rate and lead times, the chance of the AWP (Awaiting Parts) occurring is 50%. In this study, to counter the uncertainties of requirements and lead times from the RFM, the safety level concept is considered. To obtain the safety level for requirements, the binomial probability distribution is applied, while the safety level for lead time is obtained by applying the normal probability distribution. After adding this concept, the improved RFM is renamed as the ARFM (Advanced RFM), and by conducting the numerical stimulation, the effectiveness of the ARFM, minimizing the occurrence of the AWP, is shown by increasing the efficiency of the maintenance process and the operating rate of the weapon system.

• 디지털융복합연구
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• 제12권3호
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• pp.1-6
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• 2014

본 연구는 2000년 국민주택총조사 자료(2% 샘플)를 사용하여 기혼 응답자 중 본인과 배우자의 학력 결합유형에 대해 살펴보았다. 21-70세 응답자를 10년 단위로 5개 연령대별 결혼유형을 분석한 결과는 전체 결혼에서 동일한 학력을 가진 배우자와 결혼하는 동질혼이 65%, 자신보다 고학력인 남성과 결혼하는 여성 상승혼이 30%로 이 두 유형이 전체 결혼유형의 90%를 설명하는 것으로 나타났다. 교육동질혼 경향은 모든 연령대에서 강하게 나타났으며, 교육 수준을 초등학교, 중학교, 고등학교, 대학 이상(전문대 포함)으로 구분하여 동질혼을 비교했을 때, 초등학교와 대학 이상 그룹에서 동질혼의 비율이 매우 높았다. 이러한 동질혼 경향은 젊은 세대로 갈수록 증가하였다. 그러나 여성의 상승혼은 젊은 연령대로 갈수록 감소함을 알 수 있었다.

• Journal of Preventive Medicine and Public Health
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• 제34권1호
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• pp.47-54
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• 2001

Objectives : To analyze factors associated with elderly falls in a community dwelling, a comparatively important, but somewhat neglected, health mailer. Methods : Data came from personal interview surveys using a questionnaire of 552 people aged 65 or older living in a community. Socioeconomic, and health related characteristics were investigated as independent variables and experiences of falling in the previous year as the dependent variable. Results : 118(21.4%) of the elderly subjects experienced a fall in the previous year. 24 subjects experienced more than two falls, accounting for 20.3% of the elderly fall victims studied. Factors affecting the falls were families living together, level of daily activity, heart disease, and aconuresis;, therefore an elderly person who lives alone, lives independently, has heart disease, or suffers urinary incontinence had a demonstrated increased chance of failing. Conclusion : Groups at risk for luting included elderly persons living alone, living independently, suffering heart disease, or experiencing urinary incontinence. When an elderly fall prevention program is developed and implemented, these results should be considered.

• 한국환경교육학회지:환경교육
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• 제21권3호
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• pp.1-12
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• 2008

This study is aimed at suggesting ways to develop field trip or learning materials focusing on environment of Jeju seashore in order to make an effective field trip. To perform these purposes, the contents and concepts were analyzed from environment-related 'geological unit' of elementary science textbook. Afterwards, the places having the geological features in coincidence with them are chosen, and investigated, and these regions can develop into geological teaming places for field trip. Each teaming spot focuses on understanding and finding out the characteristic geological environment of rock shore, gravel shore, sand shore, shellfish shore, and tideland shore among Jeju shores. When field trip is conducted at the preparatory stage, students can get advance knowledge on geological concepts from textbook. The activity record paper is presented at the field trip stage where students observe geological phenomena on their own. After field trip is finished, the summary stage is given to solve some problems on the basis of the observed contents. The developed data from this research have its regional limits, but is surely useful for teachers who try to plan field trip when they especially choose the right field trip spots, or plan to make the process for field trip preparation of the environmental education. Furthermore, with this survey and activities, students can take the chance to improve the learning effect through their own experience on environment of Jeju seashore.

• 한국정보과학회논문지:데이타베이스
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• 제30권3호
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• pp.225-236
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• 2003

다차원 온라인 분석처리 (MOLAP, Multidimensional On-line Analytical Processing) 시스템은 데이타를 큐브라고 불리는 다차원 배열에 저장하고 배열 인덱스를 이용하여 데이타를 엑세스한다. 큐브를 디스크에 저장할 때 각 변의 길이가 같은 작은 청크들로 조각내어 저장하게 되면 데이타 클러스터링 효과를 통해 모든 차원에 공평한 질의 처리 성능이 보장되며, 이러한 큐브 저장 방법을 ‘청크기반 MOLAP 큐브’ 저장 방법이라고 부른다. 공간 효율성을 높이기 위해 밀도가 낮은 청크들은 또한 압축되어 저장되는데 이 과정에서 데이타의 상대 위치 정보가 상실되며 원하는 청크들을 신속하게 엑세스하기 위해 인덱스가 필요하게 된다. 본 연구에서는 비트맵을 사용하여 청크기반 MOLAP 큐브를 인덱싱하는 방법을 제시한다. 인덱스는 큐브가 생성될 때 동시에 생성될 수 있으며, 인덱스 수준에서 청크들의 상대 위치 정보를 보존하여 청크들을 상수 시간에 검색할 수 있도록 하였고, 인덱스 블록마다 가능한 많은 청크들의 위치 정보가 포함되도록 하여 범위 질의를 비롯한 OLAP 주요 연산 처리 시에 인덱스 엑세스 회수를 크게 감소시켰다. 인덱스의 시간 공간적 효율성은 다차원 인덱싱 기법인 UB-트리, 그리드 파일과의 비교를 통해 검증하였다.

• 한국멀티미디어학회논문지
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• 제8권12호
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• pp.1613-1622
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• 2005

Broadcasting is fundamental and effective data dissemination mechanism for route discovery, address resolution, and many other network services in mobile ad hoc networks. Although many approaches for broadcasting have been proposed to minimize the number of retransmissions, none of them guarantee the best-suited bounds of retransmissions. Appropriate use of probabilistic method can lower the chance of contention and collision among neighboring nodes, so that it reduces the number of rebroadcasts. In this paper, we propose a probabilistic approach that dynamically adjusts the rebroadcasting probability according to the distance between the sender and the receiver. While the rebroadcast probabilities of a mobile node close to sender will be set lower, the rebroadcast probabilities of a mobile node far away from sender wi1l be set to higher, The rebroadcast probability of a node wi1l be set according to the distance from sender. We evaluate the performance of proposed approach by comparing it with flooding as well as a fixed probabilistic broadcast approach. Simulation results showed that the performance of proposed scheme outperforms by about $70\%$ than flooding scheme and outperforms by about $20\%$ than fixed probabilistic scheme.