• 한국수자원학회논문집
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• 제31권1호
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• pp.85-93
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• 1998

본 연구는 도시하천인 한강 하류부에 2차원 유한요소모형을 적용하여 하천의 수리학적 특성에 따른 오염물질의 거동특성을 모의하고 예측하기 위한 것으로서 흐름상태를 분석할 수 있는 RMA-2V 모형과 동적 수질예측이 가능한 RMA-4모형을 이용하였다. 2차원 유한요소모형을 사용하여 수질의 거동특성을 모의하여 본 결과 유량 및 유속의 변화는 오염물질의 이송확산에 큰 영향을 미치는 것으로 나타났으며, 탄천 및 중랑천은 대상구역내의 수질오염에 큰 영향을 미치는 것으로 나타났다. 불시의 오염사고가 발생했을 때 오염물질이 하류부로 이동함에 따라 최대 COD 값은 감소하고,오염물질이 영향을 미치는 지속기간은 커지는 것을 알 수 있었고, 전체적으로 좌·우안의 오염물질의 농도차가 크게 나타났으며, 이로써 한강과 같은 대하천의 경우 실시간 예측시 2차원 해석이 필요한 것으로 나타났다.

• 감성과학
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• 제4권2호
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• pp.69-77
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• 2001

인간의 적응적인 마음상태는 긍정적/부정적 사고의 상호작용에서 자기 고양적인 방향으로 편향된 비대칭성을 가정한다. 본 논문에서는 긍정적/부정적 인지, 정서의 균형에 대한 심리 수학적 모형인 SOM 모형을 감성판단 영역에 적용하여 보았다. ,iOM 모형은 개인이 긍정적, 부정적 감성의 이분법적 판단에 있어서 평균적으로 6B의 비율을 유지한다고 제안하며, 이러한 비율은 고대수학의 .6)0 ,.182의 황금분할비와 일치하는 것이다. 32명의 일반성인을 대상으로 한 분석결과, 긍정적/부정적 감성단어에 대한 자기 관련성 평정의 SOM 비율은 .62(SD=.On)로 나타났으며, 우연회상 과제수행의 SOM 비율은 .18(SD=.34)로 이론적 기준과 유사하게 나타났다. 또한 상관분석에서 개인의 10M 비율은 긍정적/부정적 감성단어에 대한 평정과도 유의미한 상관관계를 지니고 있는 것으로 나타났다. 이러한 결과를 바탕으로 인지적 균형비의 의미와 감성과학 분야의 적용 가능성에 대해 제안하였다.

• 한국의류학회지
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• 제38권5호
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• pp.769-782
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• 2014

This study considers the correlation between model pose and clothes in Patrick Demarchelier's fashion photos as well as expression characteristics. The conclusions of the study are as follows. The type of model pose in Patrick Demarchelier's fashion photos can be categorized into five types: maximized type of upper and lower body part, minimized type of upper and lower body part, maximized type of upper body and minimized type of lower body part, minimized type of upper body and maximized type of lower body part, basic type of upper and lower body part. In case of having examined the correlation between body movement and costume, the clothes in the model pose included in the maximization of the body were formed mainstream by silhouette, which was formed by decorative elements or full drapery. In the model poses included in the reduction of the body, the costume tended to expose many parts of the body to provide a simple or structural silhouette form. The costume was expressed in colorful form and poses assumed without body movements. The expression characteristics of the model poses in Patrick Demarchelier's fashion photos were sensuality, dynamicity, and simplicity. First, sensuality was expressed as feminine sensuality accompanying an erotic mood by naturally emphasizing a woman's breast or leg by reducing the body. Second, dynamicity provided a vividness to the image as if directly living and moving by highlighting the rhythmic aspect of the body. Simplicity aroused the effect of paying attention to clothes or other incidental elements rather than the image expressed by the body of a model by excluding body movement.

• 한국추진공학회지
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• 제18권3호
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• pp.70-77
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• 2014

본 논문은 한국형 2.75 인치 로켓 추진기관의 독자 모델 개발에 관하여 기술하였다. 개발된 한국형 2.75 인치 로켓 추진기관은 추진제 그레인의 형상변경을 통하여 화염안정성을 증대시켰으며, 점화장치에 EMI 필터를 장착하여 우발점화 방지기능을 추가하였다. 그리고 노즐 형상 변경 및 날개 수 증가를 통하여 비행안정성의 향상을 가질 수 있었다. 지상연소시험 및 온도충격시험을 통해 추진제의 성능을 검증하였으며, 약 210 발의 비행시험을 통해 기 배치된 추진기관과 비행성능이 동일함을 입증하였다. 성능개량과 더불어 한국형 독자모델 개발로 인한 지적재산권 문제 극복에 기여할 수 있는 근간을 마련했다는데 그 의의가 있다.

• Imaging Science in Dentistry
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• 제43권1호
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• pp.25-30
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• 2013

Purpose: This study was performed to determine the prevalence of bifid mandibular condyles (BMCs) in asymptomatic and symptomatic temporomandibular joint (TMJ) subjects with no traumatic history, and to assess their impact on clinical and radiographic manifestations of TMJ. Materials and Methods: A total of 3,046 asymptomatic and 4,378 symptomatic patients were included in the study. Cone-beam computed tomography (CBCT) images were reviewed for bifid condyles. T-tests were used to compare the frequency of BMCs when stratified by symptom, gender, and side. In BMC patients, the clinical features of pain and noise, osseous changes, and parasagittal positioning of the condyles were compared between the normally shaped condyle side and the BMC side using chi-squared tests. Results: Fifteen (0.49%) asymptomatic and 22 (0.50%) symptomatic patients were found to have BMCs. Among the bilateral cases, the number of condyles were 19 (0.31%) and 25 (0.29%), respectively. No statistically significant differences were found between asymptomatic and symptomatic patients, between female and male patients, or between the right and left sides (p>0.05). Compared with the normally shaped condyle side, the BMC side showed no statistically significant differences in the distribution of pain and noise, parasagittal condylar position, or condylar osseous changes, with the exception of osteophytes. In the symptomatic group, osteophytes were found more frequently on the normally shaped condyle side than the BMC side (p<0.05). Conclusion: BMCs tended to be identified as an incidental finding. The presence of BMC would not lead to any TMJ symptoms or cause osseous changes.

• Tuberculosis and Respiratory Diseases
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• 제41권6호
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• pp.658-662
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• 1994

저자등은 종격동에서 늑막삼출액과 함께 종물이 있는 소견을 보였던 환자에서 세포진검사 및 면역화학적 검사를 통하여 평활근육종으로 진단된 1예를 경험하였기에 문헌고찰과 함께 이를 보고하는 바이다.

• 수산경영론집
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• 제30권2호
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• pp.55-77
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• 1999

As the population grows, the importance of the fishery industry continues to rise. It is therefore vital to support and promote sustainable fishery industry. However, the fishery production has been declining, mainly due to overdevelopment and depletion in fishery resources and stricter limits on development limits caused by growing concerns over the marine environment and ecology. Recently, international activities related to marine environmental and its ecosystems conservation, have been vigorously pursued. The United Nations Convention on The Law of The Sea has stipulated the protection and conservation of the marine environment, and the implementation of fishery resources development, made in harmony with the environment and fishery resources and based upon scientific findings and principles has become important. Accordingly, fishery industry must pay thorough attention to marine ecological and environmental problems and its international fisheries regime. Fisheries development can affect fishery resources, their environment and ecosystems. Adverse ecological effects resulting from fishery resources development practices in general include overdevelopment and incidental development of non target species, physical degradation of seabed habitants and degraduation of water quality. It has now become more important than ever to build up fishery resources development while achieving the conservation of biodiversity and the marine environment, as well as the restoration of destroyed ecosystems. To maintain fishery industry, it is necessary to develop bioeconomic fishery production system and industry policies for the ESSD(environmentally sound and sustainable development) given that maintenance of a favourable marine environment will ensure the fishery resources productivity. These bioeconomic system and policies are necessary to ensure the sustainability and viability of the fishery industry under ESSD fisheries concepts.

• 한국기록관리학회지
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• 제16권1호
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• pp.175-193
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• 2016

토픽맵은 방대한 양의 정보를 의미론적 연관관계에 따라 분류, 조직하여 탐색할 수 있도록 효율적인 검색을 제공하기 위해 제안된 도구이다. 본 연구는 대학의 교직원들이 학사행정 대학기록물 검색시 의미기반 검색을 통해 보다 적합한 검색결과를 제공받을 수 있도록 토픽맵 기반 대학기록물 검색시스템을 설계한 것이고 그 과정을 보여준다. 본 연구를 위해 D대학의 2년간 학사행정 기록물들이 사용되었고 의미관계를 구조화하기 위해 대학의 업무 기능 분류표를 참조하였다. 온토피아 옴니게이트를 사용하여 토픽맵을 구축하였다. 대학의 학사행정 관련 기록물의 토픽은 총 626개로 나타났고, 토픽 타입은 학사업무, 교직원, 학적, 대학, 학생, 기타로 구성하였다. 관계는 토픽들간의 연관으로 6개 유형이 나타났고, 어커런스 타입은 등록구분, 등록번호, 등록일, 수신자, 제목, 기안자, 분류번호 등의 7개로 정의하였다. 본 연구에서 설계된 토픽맵 기반의 검색시스템의 관계적 속성은 대규모 기록물을 쉽게 탐색하고 지식의 우연한 발견을 가능하게 할 것으로 기대된다.

• Imaging Science in Dentistry
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• 제47권3호
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• pp.175-180
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• 2017

Purpose: Pineal gland calcification has been proposed to play a role in the pathogenesis of Alzheimer disease. This study evaluated the prevalence and extent of pineal gland calcification in cone-beam computed tomography (CBCT) scans of patients referred for dental implant therapy who could possibly be a vulnerable group for this condition. Materials and Methods: A retrospective evaluation of 500 CBCT scans was conducted. Scans that showed the area where the pineal gland was located were included. The scans were initially screened by a single observer to record the prevalence and extent of calcification. Six weeks following the completion of the study, another investigator randomly reviewed and selected 50 scans to investigate inter-observer variation, which was evaluated using reliability analysis statistics. The prevalence and measurements of the calcifications were reported using descriptive statistics. The chi-square test was used to compare the prevalence between males and females. Results: The prevalence of pineal gland calcification was 58.8%. There was no statistically significant correlation between age and the extent of the calcification. The prevalence of calcification was 58.6% in females and 59.0% in males. The average anteroposterior measurement was $3.73{\pm}1.63mm$, while the average mediolateral measurement was $3.47{\pm}1.31mm$. The average total calcified area was $9.79{\pm}7.59mm^2$. Conclusion: The prevalence of pineal gland calcification was high in patients undergoing implant therapy. While not all pineal gland calcifications lead to neurodegenerative disorders, they should be strongly considered in the presence of any symptoms as a reason to initiate further investigations.

• Clinical and Experimental Reproductive Medicine
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• 제47권2호
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• pp.122-129
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• 2020

Objective: The survival of a semi-allogeneic fetus depends on several immunological mechanisms, and it has been suggested that recurrent pregnancy loss (RPL) could develop as a result of one or more immunological abnormalities. Methods: Compatibility between partners for human leukocyte antigen (HLA) genotypes and the relationships between maternal killer-cell immunoglobulin-like receptor (KIR) and paternal HLA-Bw4/Bw6 and HLA-C1/C2 supra-groups were investigated in 25 couples with RPL in comparison to healthy couples with children. HLA and KIR genotyping was performed using polymerase chain reaction with sequence-specific primers and/or sequence-specific oligonucleotides. Results: HLA class I incompatibility between partners, especially in HLA-B alleles, was more common in the RPL group (p= 0.01). HLA-C2 homozygosity was more frequent in the male partners of RPL couples than in other groups (p= 0.03). The KIR2DL5 gene frequency was significantly higher in both the female and male partners of RPL couples, whereas the KIR2DS3 gene frequency in male partners of RPL couples was significantly reduced (p= 0.03). The presence of KIR2DL3 in women with RPL was correlated with the presence of HLA-C2 alleles in their spouses (p= 0.03). Conclusion: Our data from a Turkish population suggest that male HLA-C2 homozygosity may play an important role in RPL. Additionally, an incidental match between male HLA-C2 and female HLA-C1 ligand KIR receptors might perturb the balance between activatory and inhibitory KIR-ligand interactions during pregnancy in couples affected by RPL. The roles of orphan KIR2DL5 and orphan KIR2DS3 in RPL remain obscure.