장스팬 대형.대공간 구조물의 시공기술

최선영,Choi, Sun-Young 한국공간구조학회 2004 한국공간구조학회지 Vol.4 No.2

말기암환자에서 혈중 비타민 D 농도와 생존기간과의 관련성

최선영,최윤선,황인철,이준영,Choi, Sun Young,Choi, Youn Seon,Hwang, In Cheol,Lee, June Young 한국호스피스완화의료학회 2015 한국호스피스.완화의료학회지 Vol.18 No.2

목적: 국내 말기암환자를 대상으로 혈중 vitamin D 농도를 측정하고, 생존기간과의 관련성에 대하여 확인해 본다. 방법: 2012년 5월부터 15개월 동안, 국내 일개 병원의 말기암환자 96명을 대상으로 후향적 의무기록 조사를 시행하였다. Vitamin D 결핍에 영향을 미치는 요인들을 파악하기 위해 단순 로지스틱 회귀분석과 다중 로지스틱 회귀분석을 실시하였고, vitamin D가 생존기간에 미치는 영향을 파악하기 위해 다변수 분석으로 Cox's proportional hazard regression analysis를 실시하였다. 결과: 대상자의 평균 연령은 $67.06{\pm}13.77$세였고, 모든 대상자가 ECOG PS 3점 이상이었으며 혈중25(OH)D 농도는 평균 $8.60{\pm}7.16ng/ml$였다. 3명(3.1%)만이 vitamin D 충분상태(혈중 25(OH)D 농도${\geq}30ng/ml$)였으며, 5명은 vitamin D 상대적결핍상태(혈중 25(OH) 농도 20~30 ng/ml)였고, 13명(13.5%)은 vitamin D 결핍(혈중 25(OH)D 농도 10~20 ng/ml), 75명(78.1%)은 vitamin D 중증결핍상태(혈중 25(OH)D<10 ng/ml) 였다. 혈중 빌리루빈 농도가 1.2 mg/dl 이상인 경우 vitamin D 중증결핍과 관련이 있었다(Odds ratio, OR=5.041; P=0.039). 혈중 빌리루빈 농도가 높을수록 혈중 vitamin D 농도가 낮았으며, 고빌리루빈혈증인 환자는 vitamin D 중증결핍에 속할 위험이 더 크고(OR=18.476, P<0.05), 중앙생존기간도 유의하게 짧았다. Vitamin D 중증결핍인 경우 추정된 중앙생존기간은 짧았으나 통계적 유의성은 없었다. 다변량 분석결과에서 vitamin D 중증결핍은 사망의 위험인자가 아니었다. 결론: 말기암환자에서 혈중 vitamin D 결핍은 매우 심각하였으나, vitamin D 중증결핍이 생존기간에 영향을 미치지는 않았다. Purpose: We aimed to investigate how serum vitamin D levels are related to survival of terminally ill cancer patients. Methods: From May 2012 through June 2013, a retrospective chart review was performed on 96 hospice patients. Univariate and multivariate logistic regression analyses were conducted to identify factors associated with severe vitamin D deficiency and Coxcy and Coxional hazard analyses were used to evaluate effects on survival. Results: The mean vitamin D level in patients was $8.60{\pm}7.16ng/ml$. Vitamin D was severely deficient (<10 ng/ml) in 75 patients (78.2%), deficient (10~20 ng/ml) in 13 patients (13.5%), relatively insufficient (21~29 ng/ml) in five patients (8.3%) and sufficient ((t ng/ml) in three patients (3.1%). Hyperbilirubinemia (${\geq}1.2g/dl$) was the only factor associated with severe vitamin D deficiency according to the multiple logistic regression analysis (Odds ratio, OR=18.48, P<0.05). Although hyperbilirubinemia showed a strong association with survival (Hazard ratio, HR=2.25, P<0.01), no association was found between severe vitamin D deficiency and survival (HR=1.15, P>0.05) in Cox's proportional hazard analysis. Conclusion: Although serum vitamin D levels were severely low in terminally ill cancer patients, we found no association between severe vitamin D deficiency and patient survival.

전산화단층사진을 이용한 부비동의 해부학적 변이에 관한 연구

최선영,임숙영,박주미,고광준,Choi Sun-Young,Lim Sug-Young,Park Ju-Mi,Koh Kwang-Joon 대한영상치의학회 1999 Imaging Science in Dentistry Vol.29 No.2

Objectives : To evaluate the anatomic variations of the paranasal sinuses on computed tomographs. Materials and Methods : The author examined the CT images of the paranasal sinuses retrospectively in 500 patients who visited Chonbuk National University Hospital between January 1996 and December 1997. Results : The highest incidence of anatomic variation of the paranasal sinuses in bilateral structures was agger nasi cel1(73.2%), followed by concha bullosa(31.1%), Onodi cell(24.0%), Haller ce1109.8%), maxillary sinus septum(3.0%), paradoxical middle turbinate(2.5%), pneumatized uncinate process(2.0%), and bent uncinate process. The highest incidence of anatomic variation in midline structures was nasal septum deviation(53.2%), followed by nasal septum aerated(29.4%), bulla galli(24.7%) asymmetric intersphenoid septum(22.3%), and nasal septum spur(13.8%). The correlation between anatomic variation and paranasal sinusitis was not found. Conclusions : The results of this study will aid in the diagnosis and treatment of paranasal sinus diseases, especially in the treatment planning before functional endoscopic surgery.

토마토로부터 N-nitrosodimethylamine 생성을 억제시키는 유효성분의 검색

최선영,이인숙,이수정,손미예,신정혜,서종권,강민정,성낙주,Choi, Sun-Young,Lee, In-Sook,Lee, Soo-Jung,Shon, Mi-Yae,Shin, Jung-Hye,Seo, Jong-Kwon,Kang, Min-Jung,Sung, Nak-Ju 한국생명과학회 2006 생명과학회지 Vol.16 No.5

토마토 주스를 Sep-pak $C_{18}$ cartridge를 이용하여 ascorbate 및 phenolic 획분으로 분리하여 NDMA 생성 억제 효과를 시험하였다. 시료의 첨가량이 많을수록 NDMA 억제 효과가 비례적으로 증가하여 ascorbate 획분은 최고 $81.37{\pm}0.25%$, phenolic 획분은 $72.03{\pm}0.25%$였다. Phenolic 획분을 prep-HPLC로 4개의 fractions으로 분취하여 NDMA 생성 억제 효과를 실험한 결과 fraction 2에서 활성이 가장 높았으며, fraction 2를 다시 4개의 subfractions으로 재분취하여 활성실험을 한 결과 subfraction 2b의 획분에서 최대 억제율이 pH 1.2에서 $70.62{\pm}0.45%$ 및 pH 4.2에서 $75.30{\pm}0.45%$였다. 그래서 subfraction 2b를 분리, 정제한 후 GC-Mass 및 $^1H-NMR$과 $^{13}C-NMR$로 동정한 결과 phenolic acid의 일종인 o-coumaric acid임을 확인할 수 있었다. A tomato (Lycopersicon esculentum cv. Naomi F1) juice was separated into ascorbate and phenolic portions using a Sep-pak $C_{18}$ cartridge, and its each portion was tested for inhibition of N-nitrosodimethylamine (NDMA) formation. Ascorbate and phenolic portions of tomato juice inhibited NDMA formation by $81.37{\pm}0.25%$ and $72.03{\pm}0.25%$, respectively. The phenolic portion was further fractionated by prep-HPLC and inhibitory effects of NDMA formation by 4 fractions $(1{\sim}4)$ from tomato juice was tested under the different pH conditions (pH 1.2 and 4.2). Fraction 2 inhibited NDMA formation by $50.10{\pm}0.46%$ (pH 1.2) and $64.30{\pm}0.20%$ (pH 4.2), respectively. Fraction 2 was further separated into 4 subfractions $(2a{\sim}2d)$. Subfraction 2b especially inhibited NDMA formation by $70.62{\pm}0.45%$ (pH 1.2) and $75.30{\pm}0.45%$ (pH 4.2). This subfraction was confirmed o-coumaric acid through the analysis of GC-Mass spectrum, $^1H-NMR$ and $^{13}C-NMR$.

방사선조사가 MC3T3-E1 조골세포주의 type I collagen과 alkaline phosphatase mRNA 발현에 미치는 영향

최선영,고광준,Choi Sun-Young,Koh Kyang-Joon 대한영상치의학회 2003 Imaging Science in Dentistry Vol.33 No.1

Purpose: To investigate the effects of irradiation on the phenotypic expression of the MC3T3-El osteoblastic cell line, particularly an the expression of type I collagen and alkaline phosphatase mRNA. Materials and Methods: Cells were irradiated with a single dose of 0.5, 1, 2, 4, and 8 Gy at a dose rate of 5.38 Gy/min using a cesium 137 irradiator. The specimens were then harvested and RNA extraction was carried out at 1 and 3 days after irradiation. The extracted RNA strands were reverse-transcribed and the resulting cDNA fragments were amplified by PCR. Results: The irradiated cells demonstrated a dose-dependent increase in type I collagen mRNA expression relative to the control group, with a maximum level of type I collagen mRNA expression occurring at 8 Gy. The degree of type I collagen mRNA expression increased significantly at 1 day after irradiation, but little differences were found between the control group and at the 3rd day. The amount of alkaline phosphatase mRNA expression increased significantly at land 3 days after irradiation in the 1 Gy exposed group compared with the control group. Conclusion: The amount of type I collagen and alkaline phosphatase mRNA expression increased significantly 1 day after irradiation when compared with the control group.

부비동염에 관한 전산화단층방사선학적 연구

최선영,임숙영,고광준,Choi Sun-Young,Lim Sug-Young,Koh Kwang-Joon 대한영상치의학회 1999 Imaging Science in Dentistry Vol.29 No.2

Objectives : The purpose of this study is to evaluate the computed tomographic (CT) images of the paranasal sinusitis(PNS). Materials and Methods : The author examined the extent and recurring patterns of the paranasal sinusitis and some important anatomic landmarks. The author analyzed PNS images retrospectively in 500 patients who visited Chonbuk National University Hospital between January 1996 and December 1997. Results : The most frequently affected sinus was maxillary sinus (82.9%), followed by anterior ethmoid sinus(67.9%), posterior ethmoid sinus(48.9%), frontal sinus(42.0%) and sphenoid sinus(41.4%). The characteristic features of CT images of the sinusitis were sinus opacification(22.4%), mucoperiosteal thickening(34.3%), and polyposis(2.0%). Sinonasal inflammatory diseases were categorized into 5 patterns according to Babber s classification. They were 1) infundibular(13.0%), 2) ostiomeatal unit(67.4%), 3) sphenoethmoidal recess (13.0%), 4) sinonasal polyposis (9.6%) and 5) unclassifiable patterns(18.0%). The incidences of contact between sinus and optic nerve were as follows ; the incidences of contact with posterior ethmoid sinus, sphenoid sinus. both posterior sinuses were 11.4%. 66.8%, 6.3%. respectively. The incidences of contact between sphenoid sinus and maxillary nerve, vidian nerve, internal carotid artery were 74.5%. 79.2%. 45.1%. respectively. The incidences of pneumatization of the posterior ethmoid sinus were as follows ; normal 70.6% and overriding type 29.4%. The incidences of sphenoid sinus pneumatization were as follows; normal 56.9% , rudimentary 12.5%, pterygoid recess 22.7%, anterior clinoid recess 2.7%, and both pterygoid and anterior clinoid recess type 5.2%. Conclusions : The inflammatory sinonasal diseases were classified into five patterns using the CT of PNS, which was proven to be an excellent imaging modality providing detailed information about mucosal abnormality, pathologic patterns, and the proximity of the important structures to the posterior paranasal sinuses. This result will aid in the interpretation of CT of PNS functionally and systemically.

건축기획단계 지원을 위한 BIM 기반 공간계획 시뮬레이션 시스템 개발에 관한 연구

최선영,최주원,김주형,김재준,Choi, Sun-Young,Choi, Ju-Won,Kim, Ju-Hyung,Kim, Jae-Jun 한국BIM학회 2011 KIBIM Magazine Vol.1 No.2

The planning stage of an architectural project has much more significant effects on the cost or outcome of the project than other stages of the project. In addition, the importance of architectural planning has been further increasing according to the recent trend of construction projects becoming larger in scale and more complex. In spite of this, the current situation is that the planning stage work is not being systematically managed. Accordingly, the purpose of this study was to develop a BIM-based simulation system for providing support during architectural planning stage such as spatial planning & review, cost review, project owner requirements management, etc. It is easy to review various alternatives using this system that allows not only the modeling of space object modeling but also the instantaneous review of spatial area & layout, cost, etc. based on object information. In addition, it can be used as a communication tool with the project owner as it provides the visualized information and quantitative data of the building model, and the information created through this system can be delivered to the following stage for usage. It is thought that using this system, the entire project work including the architectural planning stage can be supported and even contributing to the advancement of architectural process. 건축 프로젝트의 기획단계는 타 단계에 비해 프로젝트의 비용이나 성과에 미치는 영향력이 매우 크다. 또한 최근 건설프로젝트의 대형화 복합화 추세에 따라 건축 기획의 중요성은 더욱 증가하고 있다. 그럼에도 현재 기획단계의 업무는 체계적으로 관리되지 못하고 있는 실정이다. 이에 본 연구는 공간계획 및 검토, 비용검토, 발주자 요구사항 관리 등의 건축기획단계 업무를 지원하기 위한 BIM 기반의 시뮬레이션 시스템을 개발하는 것을 목적으로 하였다. 본 시스템은 공간 객체의 모델링뿐만 아니라, 객체 정보를 기반으로 하여 계획의 변경에 따른 공간면적 및 배치, 비용 등을 즉각적으로 검토할 수 있어 여러 대안의 검토가 용이하다. 또한 건축물 모델의 시각화된 정보와 정량적인 데이터를 제공함으로써 발주자와의 의사소통 도구로 사용할 수 있으며, 본 시스템에서 생성된 정보를 후속 단계로 전달하여 활용이 가능하다. 시스템을 이용하여 건축기획단계를 비롯한 프로젝트 전체의 업무를 지원하고 나아가 건축 프로세스의 선진화에 기여할 수 있을 것으로 생각된다.

상악골에 발생된 연골형성현 측피질골육종

최선영,최은숙,고광준,Choi Sun-Young,Choi Eun-Suk,Koh Kwang-Joon 대한영상치의학회 1998 Imaging Science in Dentistry Vol.28 No.2

39-year-old female had been treated for the exophytic mass on buccal aspect of the left, maxillary posterior area 2 years and 8 months ago. Tentative diagnosis was obtained as fibrous dysplasia on clinical and radiographic examinations and histopathologic findings revealed as osteochondroma after bone trimming at that time. She revisited for the treatment of recurred lesions. We reviewed this case with clinical. radiologic and histopathologic standpoints retrospectively, and came to a conclusion that the tumor primarily occurred was juxtacortical osteogenic sarcoma and recurred due to inadequate treatment and then expanded over intramedullary. This case shows that the diagnosis of osteosarcoma should take account of the patient history, clinical. radiographic and histopathologic findings and it requires attentive follow up check. Retrospectively reviewed results were as follows ; At first visit, oral examination revealed a bony hard swelling on the buccal aspect of the left maxillary posterior area. Radiographically, a dense radiopaque mass was noted on the site. The lesion showed hot uptake of /sup 99m/Tc-MDP. Histopathologic diagnosis was done as osteochondroma, but it was considered as osteogenic sarcoma when compared with the recurrent lesion. When she revisited for the treatment of multiple bony swelling on the left maxilla, radiograms showed typical features of malignancy such as widening of periodontal ligament space and sunray appearace, and coincided with benign characters as follows; relatively well circumscribed lesion and expansion and displacement of the adjacent structures. Finally, histopathologic findings of the lesion was well differentiated chondroblastic osteogenic sarcoma.

텐서그러티 모듈의 변형 및 응용에 관한 연구

최선영,박선우,박찬수,Choi, Sun-Young,Park, Sun-Woo,Park, Chan-Soo 한국공간구조학회 2005 한국공간구조학회지 Vol.5 No.2

텐서그러티는 연속인장-불연속압축 구성요소에 기반한 상대적으로 새로운 구조시스템이다. 좀 더 상세한 구조적 고찰이 필요하지만, 연구목적에 접근하기 위해서는 최소한 텐서그러티의 구조원리와 근본적인 역학관계를 파악하는 것이 필수적이다. 일단 이점을 확인하고 난 후에, 이러한 구조물의 특성뿐만 아니라 건축에서의 적용성을 다룬다. 그리고 이런 시스템을 규정하는 정의에 이견이 없지는 않으나, 경량구조물로써 텐서그러티의 가능성을 설명하기 위하여 구조디자인연구소(iESD)에서 제작한 텐서그러티 모듈(기본형)의 몇 가지 예를 제시한다. 따라서, 본 연구에서는 기본 정의(규정)뿐 아니라 기본 모듈의 유형을 소개하고, 건축에서 텐서그러티 모듈의 변형성과 응용성을 탐색한다. Tensegrity is a relatively new structural system based on the use of continuous tension-discontinuous compression. Of course, a much more detailed structural investigation would be necessary, but at least in order to achieve the intended purpose, it is essential to understand the structural principles and the fundamental forces of tensegrity. Once this point is established, the applications of them to architecture are described, as well as the characteristics of these structures. Then, in spite of the controversial definitions to explain these systems, several examples of tensegrity prototypes or modules constructed in iESD(Institute of Environmental Structure Design) are presented to illustrate the feasibility of tensegrity as a lightweight structure. In this work, consequently, the reformability and application of tensegrity modules have also been researched in architecture, after the patterns of basic module as well as fundamental definition are introduced.

스마트폰에서의 OTT(Over The Top)서비스 시청패턴 추적 어플리케이션 설계 : 티빙(tving)을 중심으로

최선영,김민수,김명준,Choi, Sun-Young,Kim, Min-Soo,Kim, Myoung-Jun 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.4

This study focuses on the fact that a OTT service is vigorously used for smart phones, and suggests a design of method to trace the experiences of watching television contents. For this purpose, we developed logging functions and embedded them into existing OTT service application to record flow and pattern of watching context. This paper suggests a log file format which can accurately and precisely record watching actions of users per-second methodology rather than former per-minute methodology. Moreover, this study shows that the application can trace watching attitude according to occurring events by characteristics and playing modes of realtime broadcasting, VOD, advertisement contents. In addition, based on the result of the study, this paper discusses educational, operational meaning of the method such as methodological application in mobile ethnography field or survey for total screening rate. 본 연구는 스마트폰에서 OTT 서비스 이용이 활성화되고 있는 것에 주목하여 텔레비전 콘텐츠 시청 행위 추적 방법의 설계를 제안한다. 이를 위해 기존 OTT서비스 어플리케이션을 활용하여 시청 맥락의 흐름(flow)과 패턴을 기록하는 로그 파일 기록 어플리케이션을 개발하였다. 본 논문에서 제시한 로그 파일 포맷은 기존의 분단위 시청률 조사방법이 아닌 초단위 측정으로 이용자 스마트폰을 통한 시청 행위와 시청 시간을 정확하고 정밀하게 측정할 수 있었다. 또한 실시간 방송 VOD 광고 콘텐츠 속성 및 플레이 모드에 따라 나타나는 시청 행태를 발생 이벤트에 따라 추적할 수 있었으며, GPS 데이터를 로그 파일 기록과 매칭한 결과 시청의 공간적 맥락을 분석할 수 있었다. 연구 결과를 바탕으로 패널을 이용한 통합시청률 조사 또는 모바일 민속지학(Mobile Ethnography) 에서의 방법론적 활용과 같은 학문적 실무적 의의를 논의하였다.