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폴리머 기판위에 형성된 나노구조제어 알루미나의 캐패시터 특성
정승원,민형섭,한정환,이전국,Jung, Seung-Won,Min, Hyung-Sub,Han, Jeong-Whan,Lee, Jeon-Kook 한국재료학회 2007 한국재료학회지 Vol.17 No.2
Embedded capacitor technology can improve electrical perfomance and reduce assembly cost compared with traditional discrete capacitor technology. To improve the capacitance density of the $Al_2O_3$ based embedded capacitor on Cu cladded fiber reinforced plastics (FR-4), the specific surface area of the $Al_2O_3$ thin films was enlarged and their surface morphologies were controlled by anodization process parameters. From I-V characteristics, it was found that breakdown voltage and leakage current were 23 V and $1{\times}10^{-6}A/cm^2$ at 3.3 V, respectively. We have also measured C-V characteristics of $Pt/Al_2O_3/Al/Ti$ structure on CU/FR4. The capacitance density was $300nF/cm^2$ and the dielectric loss was 0.04. This nano-porous $Al_2O_3$ is a good material candidate for the embedded capacitor application for electronic products.
법규에 따른 자원회수시설의 건축적 형태에 관한 연구 - 서울과 도쿄를 중심으로 -
정승원,이강준,Jung, Seung-won,Lee, Kang-jun 인천대학교 도시과학연구원 2022 도시과학 Vol.11 No.1
Waste to Energy Plant were recognized as hateful facilities, and there were many conflicts in the location due to social problems such as the NIMBY phenomenon due to problems such as damage to property in the surrounding area, odor, and image loss. Problems such as air pollution and odor are solved by the development of advanced prevention facilities such as electric dust collectors, wet cleaning systems, semi-dry reaction towers, bag filters, and catalyst towers (SCR: Selective Catalytic Reduction), and air recycling facilities in waste storage tanks. However, it is being avoided because of the perception that it is an incinerator. To resolve these conflicts, the government installs and operates resident convenience facilities to compensate residents near resource recovery facilities, provides green space and improves the environment, and supports heating expenses in accordance with the 「Waste Treatment Facility Support Act」. The purpose of this study is to derive implications through the analysis of domestic and overseas case studies for resident convenience facilities and environment improvement for the promotion of local communities in resource recovery facilities and use them as basic data for community promotion and environmental improvement when installing resource recovery facilities in the future.
A Study on the Fine Structure of the Marine Diatoms of Korean Coastal Waters - Genus Thalassiosira 4
정승원,Seung Won Jung,Jin Hwan Lee 한국조류학회I 2009 ALGAE Vol.24 No.2
The marine phytoplankton diatom Thalassiosira species are described from the Korean coastal waters, based on observations of fine structure of its frustules. As a fourth series, this study deals with 5 Thalassiosira species (T. decipiens, T. eccentrica, T. mala, T. nodulolineata, and T. proschkinae). The most striking features of these species are also the form and position of two processes on frustules. There is a central strutted process on valve face except T. nodulolineata, which has a modified one on its center. The external tubes of marginal strutted processes are divided two forms: “pile” form in T. decipiens and T. proschkinae, “short straw” form in T. eccentrica and T. nodulolineata. T. mala does not present the external tubes in valve margin. The labiate processes are located in valve margin except T. proschkinae, which has it on valve face. Of these, three species (T. mala, T. nodulolineata at a final contentration of 5% and T. proschkinae) were newly recorded in the coastal waters of Korea.
정승원,노완섭,Jung Seung-Won,Noh Wan-Seob 동아시아식생활학회 2006 동아시아식생활학회지 Vol.16 No.3
This study was carried out to survey the effect of Jujube extract on the growth of 3 strains of lactic acid bacteria(LBA) starter cultures in the MRS broth by the addition of 0, 0.1, 0.5, 1 and 2% extract The pH, titratable acidity and OD of LAB were investigated in order to get fundamental knowledge for the development a new product. The effects of Jujube extract on the growth of LAB were variable depending upon the LAB species and concentrations of Jujube extract significantly (p<0.05). In the results, Jujube extract enhanced the acid production and propagation by the 3 LAB strains with increasing concentration of Jujube extracts until 2.0% added was to the MRS broth medium (p<0.05). Addition of Jujube extract markedly stimulated the acid production and propagation of Lactobacillus acidophilus, Streptococcus thermophilus and Bifidobacterium longum.
악안면 기형의 상하악골 전후방적 위치관계에 대한 McNamara Analysis와 Delaire Analysis의 기준선 비교연구
정승원,김소미,변성수,박형식,정영수,Chung, Seung-Won,Kim, So-Mi,Byun, Sung-Soo,Park, Hyung-Sik,Jung, Young-Soo 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.4
Purpose: McNamara and Delaire analyses are two commonly used analytic methods, yet, they differ in their theoretic concepts and different reference lines are used for ideal surgical prediction. Therefore, the use of different analytic methods may result in different surgical plans. The purpose of this study was to compare the anterior and posterior relationship of the maxilla and mandible by using McNamara and Delaire analysis. Methods: 30 Korean patients (15 male and 15 female) who had visited the Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, for dentofacial evaluation were studied by using McNamara's and Delaire's analyses. Results: On the maxillary analysis, 26 out of 30 patients (86.7%) were in accordance. On the mandibular analysis, 20 out of 30 patients (66.7%) were in accordance. On the maxillary analysis, McNamara's analysis showed an average of 0.36 mm greater amount of prognathism compared to Delaire's analysis, and this was not statistically significant. On the mandibular analysis, McNamara's analysis showed an average of 6.03 mm greater amount of prognathism compared to Delaire's analysis, and this was statistically significant. On the mandibular analysis, 26 out of 30 patients (86.7%) showed a greater amount of prognathism on McNamara's analysis compared to that of Delaire's analysis. The remaining 4 patients (13.3%) showed the same amount of prognathism on both analyses. Conclusion: These results may serve as a reference for surgeons when determining which analytic method is to be used for optimal surgical results.
2002-2007년 통영바다목장해역에서 식물플랑크톤 현존량 및 생체량에 따른 우점종의 변동 및 관계
정승원,권오윤,이진환,Jung, Seung-Won,Kwon, Oh-Youn,Lee, Jin-Hwan 한국조류학회(藻類) 2008 ALGAE Vol.23 No.1
In order to understand variation and relationship between standing crops and biomass of phytoplankton dominant species for the long term periods, this study was seasonally investigated in the marine ranching ground of Tongyeong coastal waters from 2000 to 2007. Total 268 taxa representing 217 Bacillariophyceae, 46 Dinophyceae, 4 Dictychophyceae, 1 Euglenophyceae were observed in phytoplankton communities. Dominant species consisted of 5 species as standard in standing crops: Chaetoceros curvisetus (18.01%), Chaetoceros socialis (12.95%), Skeletonema costatum (8.39%), Chaetoceros compressus (6.87%), Asterionellopsis glacialis (5.02%). However, to determine dominant species as biomass concept, Ditylum brightwellii, Guinardia striata, Rhizosolenia spp. and Skeletonema costatum were occupied with dominant species (19.67%). As determining for cell sizes, dominant species were divided with two groups such as micro- and nanophytoplankton (standing crops) and mesophytoplankton (biomass). However, Skeletonema costatum in anophytoplankton was associated to affect fluctuation between standing crops and biomass.
건축물의 에너지 요구량 감축을 위한 전 공기 방식 공기조화의 제어방식별 유효성 분석에 관한 연구
정승원(Jung, Seung-Won),이태규(Lee, Tae-Kyu),김지영(Kim, Ji-Young),김정욱(Kim, Jeong-Uk) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.5
Office buildings are supplied with heating and cooling sources mainly by the centralized air conditioning system. Therefore, the level of energy demand must be determined in advance according to the condition of the building and the characteristics of the air conditioning system. In particular, we tried to prove that the cooling energy demand was reduced through the introduction of out side air by operating the multi-unit duct system for each zoning compared to the existing single unit duct system in view of maintaining the thermal comfort of residents. As a result of the simulation, the Air conditioning by ventilation is effective for reduction of cooling and latent energy demand. Furthermore, multi-unit duct system has more efficient than single unit duct system. We expect that this study will provide us a base line for full scale research on economic efficiency within single unit duct and multi-unit duct air conditioning system.
병리조직 소견과 인터페론감마분비검사를 통해 진단된 경화홍반 3예
정승원 ( Seung-won Jung ),최응호 ( Eung Ho Choi ) 대한피부과학회 2022 대한피부과학회지 Vol.60 No.2
Erythema induratum (EI) is a tuberculid caused by a hypersensitivity reaction against Mycobacterium tuberculosis or its metabolic products, but it is usually absent in skin lesions. Interferon-γ release assay (IGRA) has been used for diagnosing M. tuberculosis infection instead of the tuberculin skin test and mycobacterial culture, which have limitations for accurate diagnosis. EI was clinically suspected in our cases, and all of them had a family history of tuberculosis. Histopathological findings were consistent with those of EI. Mycobacterium-reverse blot hybridization assay conducted in two cases was positive for M. tuberculosis, and all cases were positive for IGRA. Herein, we report a case series of EI diagnosed by histopathology and IGRA and then successfully treated with anti-tuberculosis treatments. (Korean J Dermatol 2022;60(2):115∼119)
사례보고 : 간절제술 후 원발병소인 간내 재발 없이 간외전이를 일으킨 간상피모양혈관내피종 1예
정승원 ( Soung Won Jeong ),우현영 ( Hyun Young Woo ),유찬란 ( Chan Ran You ),허원행 ( Won Hang Huh ),배시현 ( Si Hyun Bae ),최종영 ( Jong Young Choi ),윤승규 ( Seung Kew Yoon ),정찬권 ( Chan Kwon Jung ),정은선 ( Eun Sun Jung ) 대한간학회 2008 Clinical and Molecular Hepatology(대한간학회지) Vol.14 No.4
간상피모양혈관내피종은 혈관에서 기원하는 종양으로 간에서 발생하는 가장 드문 육종 중의 하나로서 저등도에서 중등도의 악성도를 가지고 있다. 아직까지 원인은 알려져 있지 않으며 예후 또한 예측하기 어렵다. 발생빈도가 낮고, 불균일한 특성, 다양한 임상경과 등으로 현재까지 정해져 있는 치료지침은 없다. 저자들은 64세 여자 환자에서 우엽에 발생한 간상피모양혈관내피종을 간절제술을 시행하고 22개월 후에, 원발병소인 간내 재발은 없이 골, 흉막, 복강 등으로 간외전이를 보인 사례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Epithelioid hemangioendothelioma is a neoplasm of vascular origin with a low-to-intermediate malignant potential and is one of the rare sarcomas arising from the liver. Its etiology is unknown and its clinical outcome is unpredictable. There is no generally accepted therapeutic strategy because of its rarity and the variable natural course between hemangioma and angiosarcoma. We report a case of a 64-year old woman who underwent hepatic resection due to epithelioid hemangioendothelioma in the right lobe that progressed to extrahepatic metastases of the bone, pleura, and peritoneum 22 months later. However, after resection there was no primary hepatic recurrence. (Korean J Hepatol 2008;14:525-531)