• Journal of Dental Anesthesia and Pain Medicine
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• 제19권6호
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• pp.361-367
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• 2019

Background: Although studies on dental fear in relation to sex and age have been conducted, there have been few nationwide studies particularly on the youth sector. In addition, no validity and reliability verifications have been implemented for new research groups on the Korean version of the Dental Fear Survey (K-DFS). Therefore, this study aimed to apply the K-DFS developed in a previous study on Korean youth to draw conclusions on dental fear among the youth. Methods: This study used the K-DFS, a Korean translation of Kleinknecht's Dental Fear Survey for elementary school, middle school, and high school students. This study selected 2,161 young people of various ages as participants and increased the validity of the research results by expanding nationwide the scope of the study area. Results: Differences in fear levels according to sex were higher in boys fear behavior scores than in girls' regarding dental treatment (P < 0.05). Students with dental fear had higher scores on items associated with dental treatment and fear of dental stimuli compared with students without dental fear (P < 0.05). Differences were observed among the three groups (P < 0.05). However, the results of logistic regression analysis showed no statistically significant differences for dental visits based on sex, grade, and other subcomponents (P > 0.05). Conclusion: By verifying the validity of the newly developed K-DFS, this research confirmed its utility as a dental fear questionnaire. Therefore, there can be no objection that the grounds for criticism have been established according to conventional wisdom. In the future, however, developing and studying the limits of K-DFS that overcome the factors of dental fear, especially pain, will help reduce dental fear in adolescents.

• 환경영향평가
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• 제17권3호
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• pp.177-188
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• 2008

Attempts to develope designation criteria for ecological protected areas were made for rational and scientific designation and management of 'ecosystem and landscape conservation areas', 'wetland protection areas', 'special islands protection areas', and 'wildlife protected areas' which have been designated and managed by the Ministry of Environment. Through analysis of the requisites and criteria of IUCN, UNESCO, Natura 2000, the Ramsar convention, the United States, the United Kingdom, Japan, and Germany as well as various academic researches, evaluation items of the protected areas were classified into naturalness, biodiversity, ecosystem, and scientific values. These classification titles are reflection of Korean laws concerning the 4 protected areas described above. Of these items 'naturalness' is composed of 3 factors of wilderness, geomorphology and landscape, and vegetation. 'Biodiversity' is composed of the 5 factors of species diversity, endangered species, rare species, indigenous biological resources, and habitat of wetland wild animals. 'Ecosystem' is composed of 5 factors of typicalness, diversity, rarity, restoration ability, and degree of interference. All factors are scored using a 3 point scale of high, middle, or low and are then transformed into the numerical index for designating and zoning purposes. Conclusively, it is expected that the developed methodology will be highly applicable with field verifications.

• 한국구조물진단유지관리공학회 논문집
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• 제8권2호
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• pp.159-167
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• 2004

콘크리트의 압축강도는 콘크리트를 생산하는 기준으로 사용된다. 콘크리트 압축강도 시험은 복잡하고 시간이 걸리는 일이고, 보통 건설현장에서 타설 후 28일 후에 실행되기 때문에, 시험결과가 필요강도를 만족하지 않을 경우에 구조물의 시공에 문제를 초래할 수도 있다. 따라서, 콘크리트 타설 전에 강도를 예측하는 것이 요구되고 있다. 본 연구에서는 콘크리트 배합비를 기초로 하여 콘크리트 압축강도를 예측하기 위한 확률론적 방법을 제시하였다. 패턴인식 분야에서 많이 활용되어온 확률신경망 기법을 활용하여 콘크리트 압축강도 추정을 수행하였다. 콘크리트 압축강도 시험결과를 활용하여 확률신경망 기법의 적용성을 검증하였으며, 실제 시험결과와 비교를 수행하였다. 비교결과, 본 연구에서 제시된 확률신경망을 활용한 콘크리트 압축강도 추정기법이 콘크리트의 압축강도를 확률적으로 추정하는데 매우 효과적으로 적용될 수 있음을 확인하였다.

• 한국가금학회지
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• 제35권4호
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• pp.335-339
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• 2009

초저밀도 아포지단백(Very Low Density Apolipoprotein-II)은 조직의 지방단백질 분비 조성과 밀접한 관련이 있다고 알려진 유전자로서 최근 닭에서 성장 및 체구성과 매우 높은 연관이 있다고 알려져 있다. 본 연구는 닭의 3품종에서 PCR-RFLP 방법을 통해 apoVLDL-II 유전자의 유전자형을 분석하고 Broiler 형(B)과 Fayoumi 형(F)을 결정하였다. 각 품종간 유전자형 빈도는 한국 재래계에서 BB가 0.37, BF가 0.43, FF가 0.2로 검출되었고, 오계에서 BB가 0.2, BF가 0.6, FF가 0.2로 검출되었으며, 백색레그혼에서 BB가 0.16, BF가 0.84로 검출되었다. Broiler 형은 성장이나 체구성을 높이는 방향으로 작용한다는 기존의 보고를 바탕으로 본 연구에서 나타난 집단내 다양한 유전자형 분포는 재검증 작업을 거쳐 육종에 의해 이 형질들을 개량할 수 있음을 의미한다.

• 대한한방부인과학회지
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• 제21권1호
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• pp.150-167
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• 2008

Purpose: This is a following study of preceding study about application and improvement of acupuncture benefits in OB & GY disease that was performed in 2007. And this study was performed to complement and compare with a preceding study. Methods: The questionnaire used in preceding survey was distributed to general korean medical doctors who have mainly worked in oriental medical clinic. And results of this survey was compared with results of preceding survey. Results: Results of two surveys were almost similar. 1. The common suitable the sick and wounded name of Ob & Gy disease thought be added in Intra-abdominal acupuncture(腹腔內; CV13 ${\cdot}$ CV16 ${\cdot}$ CV10) in two surveys were dysmenorrhea(K05). infertility(K15), JingHa(pelvic tumor) (K11). In Puncture each adjoining acu-points in one insertion(透刺; SP6-GB39)were dysmenorrhea(K05), climacteric syndrome(K04). amenorrhea (K03), In Puncture each adjoining acu-points in one insertion(透刺; PC6-TE5) were climacteric syndrome(K04), hyperemesis(K16.0), dysmenorrhea(K05). 2. The common acupuncture benefits items that postpartum pain syndrome(K29) should be added as suitable the sick and wounded name were Intra-articular acupuncture(關節內; LI15, SI10, GB30), Intervertebral acupuncture (脊椎間; GV14, 16, 6, 4, 12, 11, 9, 8, 3), Puncture each adjoining acu-points in one insertion (透刺; SP6-GB39). Conclusion: Based on this study, Survey to more KMDs should be performed. And the academic and clinical verifications that supports this results should be supplied.

• 전력전자학회논문지
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• 제13권2호
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• pp.110-118
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• 2008

기존의 저궤도 인공위성 전력계 시스템에 사용된 직렬 구조, 병렬 구조는 공전 주기 동안 두 번의 전력변환 과정을 거쳐 시스템의 효율을 감소시킨다. 직-병렬 구조는 한 번의 전력변환 과정을 거쳐 시스템의 효율을 향상시키지만 레귤레이터가 추가됨으로써 시스템의 비용과 무게, 크기를 증가시킨다. 본 논문에서는 레귤레이터의 추가 없이 시스템의 효율을 향상시키는 단순화된 직-병렬 구조를 제안한다. 인공위성이 지구를 공전하는 동안 상황에 따라 변화하는 제안한 구조의 동작을 네 가지 모드로 분류하고, 각 모드마다 제안한 시스템을 안정적인 동작을 확인하기 위하여 대신호 분석을 수행하였다. 실험을 통하여 기존의 직렬구조와 제안한 구조의 효율을 비교하였다. 제안한 구조의 안정적인 동작을 검증하기 위해 200W급 태양전지와 TMS320F2812 DSP로 제어되는 100W급 전력조절기 두 모듈을 병렬로 구성하여 실험하였다.

• Journal of Advanced Research in Ocean Engineering
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• 제1권2호
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• pp.106-114
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• 2015

In the fabrication of offshore oil and gas facilities, the significance of dimension control is growing continuously. But, it is difficult to determine the deformation of the structure during fabrication by simple lab tests due to the large size and the complicated shape. Strain-boundary method (a kind of shrinkage method) based on the shell element was proposed to predict the welding distortion of a structure effectively. Modeling of weld geometry in shell element is still a difficult task. In this paper, a concept of imaginary temperature pair is introduced to handle the effect of geometric factors such as groove shape, plate thickness and pass number, etc. Single pass imaginary temperature pair formula is derived from the relation between the groove area and the FE mesh size. By considering the contribution of each weld layer to the whole weldment, multi-pass imaginary temperature is also derived. Since the temperature difference represents the distortion increment, cumulative distortion curve can be drawn by integrating the temperature difference. This curve will be a useful solution when engineers meet some problems occurred in the shipyard. A typical example is shown about utilization of this curve. Several verifications are conducted to examine the validity of the proposed methodology. The applicability of the model is also demonstrated by applying it to the fabrication process of the heavy ship block. It is expected that the imaginary temperature model can effectively solve the modeling problem in shell element. It is also expected that the cumulative distortion curve derived from the imaginary temperature can offer useful qualitative information about angular distortion without FE analysis.

• 한국실내디자인학회논문집
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• 제24권3호
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• pp.59-68
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• 2015

As the economical and cultural levels become higher, the public have more various and new cultural desires, leading to an increase in the number and kinds of cultural facilities. Out of all the cultural facilities built in such a trend, art museums are the yardstick for a certain nation's cultural level, and the number of art museums is gradually increasing every year in Korea, as a cultural space where the public can make cultural exchanges with artists. On the contrary to the increasing number of art museums, however, the number of art museum visitors is decreasing every year, so various attempts are made to activate art museums in Korea. Thus, this study aims to seek a plan to activate the space of an art museum by improving the physical movement of art museum visitors, especially targeting small-sized ones out of all the art museums in Korea. For accurate analyses and verifications, this study used the visibility-ERAM program. As a result of analyses, this study found out and reconsidered several problems related to the space of art museums, and based on the results, the researcher could verify the related hypotheses, further comprehending possible errors of the proposed solution to those problems and supplement in a short period of time. Since such an analysis method and process has objective accuracy, it is expected that the results of this study will be used as basic data for future plans to activate the space of art museums.

• 한국정보통신학회논문지
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• 제10권8호
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• pp.1478-1489
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• 2006

컨테이너 ISO코드 인식시스템은 ISO코드 검출 및 영상 획득, ISO코드 영역 추출, 개별 문자 추출, 문자인식 및 데이터베이스의 5가지 핵심부분으로 구성된다. 이 중에서도 ISO코드 추출의 정확성은 전체 시스템 인식률에 지대한 영향을 줄 수 있는 부분이며, 다양한 컨테이너 종류 및 주위 환경 변화에서도 정확한 추출을 요구한다. 본 논문에서는 획득된 영상을 주위 환경 변화에도 적응 가능한 이 진화 방법을 사용하여 ISO코드 템플릿의 영역을 이 진화하고 ISO코드의 분포를 가지는 후보 영역을 추출한다. 추출된 후보 영역 중에서 ISO코드 문자 분포의 특성을 이용한 검증과정을 통해 최종 영역을 추출하여 ISO코드를 인식하는 시스템을 설계 및 구현하였다. 구현된 시스템을 실시간으로 컨테이너에서 획득한 영상에 적용한 결과 다양한 컨테이너 종류 및 주위 환경변화에서도 ISO코드 영역이 정확히 추출됨을 확인하였다.

• 한국항만학회지
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• 제14권1호
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• pp.66-75
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• 2000

From the traffic analysis, and model constructions and verifications for speed prediction on the freeway ramp junctions with 70mph speed limit, the following results were obtained : ⅰ) The traffic flow distribution showed a big difference depending on the time periods. Especially, more traffic flows were concentrated on the freeway junctions in the morning peak period when compared with the afternoon peak period. ⅱ) The occupancy distribution was also shown to be varied by a big difference depending on the time periods. Especially, the occupancy in the morning peak period showed over 100% increase when compared with the 24hours average occupancy, and the occupancy in the afternoon peak period over 25% increase when compared with the same occupancy. ⅲ) The speed distribution was not shown to have a big difference depending on the time periods. Especially, the speed in the morning peak period showed 10mph decrease when compared with the 24hours'average speed, but the speed did not show a big difference in the afternoon peak period. ⅳ) The analyses of variance showed a high explanatory power between the speed predictive models(SPM) constructed and the variables used, especially the upstream speed. ⅴ) The analysis of correlation for verifying the speed predictive models(SPM) constructed on the ramp junctions were shown to have a high correlation between observed data and predicted data. Especially, the correlation coefficients showed over 0.95 excluding the unstable condition on the diverge section. ⅵ) Speed predictive models constructed were shown to have the better results than the HCM models, even if the speed limits on the freeway were different between the HCM models and speed predictive models constructed.