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Jinsoo Rhu,Jin Seok Heo,Seong Ho Choi,Dong Wook Choi,Jong Man Kim,Jae-Won Joh,Choon Hyuck David Kwon 대한외과학회 2017 Annals of Surgical Treatment and Research(ASRT) Vol.92 No.5
Purpose: It is believed that blood from the superior mesenteric vein and splenic vein mixes incompletely in the portal vein and maintains a streamline flow influencing its anatomic distribution. Although several experimental studies have demonstrated the existence of streamlining, clinical studies have shown conflicting results. We investigated whether streamlining of portal vein affects the lobar distribution of colorectal liver metastases and estimated its impact on survival. Methods: Data of patients who underwent hepatectomy for colorectal liver metastases were retrospectively collected. The chi-square test was used for analyzing the distribution of metastasis. Cox analysis was used to identify risk factors of survival. Fisher exact test was used for subgroup analysis comparing hepatic recurrence. Results: A total of 410 patients were included. The right-to-left ratio of liver metastases were 2.20:1 in right-sided colon cancer and 1.39:1 in left-sided cancer (P = 0.017). Cox analyses showed that margin < 5 mm (P < 0.001; 95% confidence interval [CI], 1.648–4.884; hazard ratio [HR], 2.837), age ≥ 60 years (P = 0.004; 95% CI, 1.269–3.641; HR, 2.149), N2 status (P < 0.001, 95% CI, 1.598–4.215; HR, 2.595), tumor size ≥ 45 mm (P = 0.014; 95% CI, 1.159–3.758; HR, 2.087) and other metastasis (P = 0.012; 95% CI, 1.250–5.927; HR, 2.722) were risk factors of survival. However, in 70 patients who underwent right hemihepatectomy for solitary metastasis, left-sided colorectal cancer was a risk factor (P = 0.019; 95% CI, 1.293–17.956; HR, 4.818), and was associated with higher recurrence than right-sided cancer (43.1% and 15.8%, respectively, P = 0.049). Conclusion: This study showed significant difference in lobar distribution of liver metastases between right colon cancer and left colorecral cancer. Furthermore, survival of left-sided colorectal cancer was poorer than that of right-sided cancer in patients who underwent right hemihepatectomy for solitary metastasis. These findings can be helpful for clinicians planning treatment strategy.
Radiopaque markers and hydrogram in feline alimentary lymphoma
Choi, Jihye,Lee, Jinsoo,Jang, Jaeyoung,Choi, Heeyeon,Seo, Jimin,Lee, Minjung,Kim, Hyunwook The Korean Society of Veterinary Science 2012 大韓獸醫學會誌 Vol.52 No.2
Radiography, ultrasonography with hydrogram, and contrast studies using radiopaque markers were applied to evaluate alimentary lymphoma in two cats. The hydrogram facilitated the differentiation of pseudo-thickening from true wall thickening, and enabled an evaluation of wall layering and lymph nodes. In case 1, mechanical obstruction of the duodenum was confirmed with barium-impregnated polyethylene spheres (BIPS), a radiopaque marker; however, results obtained in case 2 were not as definitive. We expect that hydrograms and BIPS can be used as valuable alternative methods to evaluate the gastrointestinal (GI) tract although further studies in cases involving GI tumors are needed.
Jinsoo Park(박진수),Namwon Kim(김남원),Minjung Choi(최민정),Zhe Jin(김철),Youngseok Choi(최영석) 한국지능정보시스템학회 2011 지능정보연구 Vol.17 No.4
시맨틱 웹(Semantic Web)의 비전에 대한 공표가 이루어진 이래로 이와 관련한 많은 연구가 진행되어 왔다. 그러나 지금까지의 연구가 성공적이었다는 판단을 하기에는 아직 이르다. 본 논문은 시맨틱 관련 연구분야의 두 가지 문제점을 진단한다. 첫째는 '시맨틱 검색'이라는 개념의 합의된 정의가 없다는 것이고, 둘째는 장래의 유관 연구를 바라볼 수 있는 종합적이고 체계적인 시각이 부족하다는 것이다. 이러한 진단 아래, 본 논문은 시맨틱 검색의 개념을 '사용자의 입력에 따라 온톨로지와 같은 시맨틱 기술을 이용하여 원하는 정보를 얻는 행위'로 정의한다. 또한 시맨틱 검색에 대한 이해를 돕기 위해 시맨틱 검색 엔진 분류 프레임워크를 제안하였다. 본 연구에서 제안하는 프레임워크는 (쿼리) 입력문의 처리, 타겟 소스, 검색 방법론, 검색결과의 서열화, 출력 결과물의 데이터 종류, 이렇게 다섯 가지 부분으로 나뉜다. 마지막으로 본 논문은 제시한 프레임워크를 응용하여 기존의 연구결과물을 분석하고 앞으로의 연구 방향을 논하는 것으로 끝을 맺는다. Since the ambitious declaration of the vision of the Semantic Web, a growing number of studies on semantic search have recently been made. However, we recognize that our community has not so much accomplished despite those efforts. We analyze two underlying problems : a lack of a shared notion of semantic search that guides current research, and a lack of a comprehensive view that envisions future work. Based on this diagnosis, we start by defining semantic search as the process of retrieving desired information in response to user's input using semantic technologies such as ontologies. Then, we propose a classification framework in order for the community to obtain the better understanding of semantic search. The proposed classification framework consists of input processing, target source, search methodology, results ranking, and output data type. Last, we apply our proposed framework to prior studies and suggest future research directions.
Chemistry and Design Considerations for Zinc Application Into Reactor Coolants of I-SMR
Jinsoo Choi,Daseul Ham,Cho-Rong Kim,Yong-Sang Cho,Hyuk-chul Kwon,Kyu-Min Song 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
Korean innovative SMR has been implemented developing with improved safety/economy and i- SMR technology development project to secure a competitive edge in SMR. For nuclear power plants, according to the revision of the Nuclear Safety Act (2013.6), it is mandatory to be reflected in the aging management program of nuclear power plants, and the aging management and regulation of major nuclear power plants are being strengthened. For i-SMR, chemistry environment and management strategy is essential to mitigate corrosion and radiation fields, since it has compacted and integrated module designs. Since 1994, zinc injection into the reactor coolant system (RCS) has been applied more than 100 PWRs in the world to mitigate primary water stress corrosion cracking (PWSCC) and to reduce outof- core radiation fields. In domestic NPPs, 7 have been applying zinc injection and had up to 90% radiation field reductions. For this reason, SMR needs to apply zinc injection for chemistry strategy. Zinc target concentration will be 5~40 ppb at i-SMR, based on Ni-Fe-Cr materials as same as PWRs. Zinc injection location is in volume and purification control system between the volume control tank and charging P/P where the pressure is moderate. Zinc injection skid can consist of two micro-controllable pump (one for operation and one for stand-by) and one injection tank (batching tank for zinc solution). Zn, Ni, Si, Fe, and activated corrosion products should be monitored to identify zinc injection controls and trends. Flux mapping for core performance monitoring should be evaluated. The application of zinc will be essential and effective and bring sustainable reliability for corrosion control and mitigation strategy to meet the risk-free i-SMR development.
Choi, Woong,Cho, Mi Yeon,Konar, Aniruddha,Lee, Jong Hak,Cha, Gi‐,Beom,Hong, Soon Cheol,Kim, Sangsig,Kim, Jeongyong,Jena, Debdeep,Joo, Jinsoo,Kim, Sunkook WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.43
<P>Sunkook Kim, Jinsoo Joo, and co‐workers demonstrate on page 5832 phototransistors based on multilayer MoS<SUB>2</SUB> crystals with a wider spectral response and higher photoresponsivity than single‐layer MoS<SUB>2</SUB> phototransistors. These multilayer MoS<SUB>2</SUB> phototransistors also exhibit high room‐temperature mobilities, near‐ideal subthreshold swings, low operating gate biases, and negligible shifts in the threshold voltages during illumination. </P>
Jinsoo Park,Jinsoo Choi,Hyunjae Kim,Jun Oh,Minyoung Seong,Joonyoung Ahn,Sangbo Lee,Jeongho Kim 한국도시환경학회 2018 한국도시환경학회지 Vol.18 No.4
This study aims to identify the characteristics of oxidation and chemical composition of PM in winter season, 2017 at Incheon area. The mean concentration of air pollutants were 46 ± 22 μg/m3-PM10, 29 ± 18 μg/m3/-PM2.5, 5 ± 3 ppb-SO2, 0.56 ± 0.24 ppm-CO, 21 ± 13 ppb-O3 and 28 ± 17 ppb-NO2, respectively. The dominant ion of the PM1.0 chemical component were organic with 3.2 μg/m3 and nitrate with 1.9 μg/m3. The day and night variation of the PM1.0 chemical components was higher in nighttime than those of daytime. The averaged nitrate oxidation rate (SOR) was 0.06 and sulfate oxidation rate was 0.11 during the field campaign. In the high mass loading period, nitrate oxidation rate (NOR) was up to 0.6 and also the nitrate in PM1.0 was increased. The averaged ratio of NOx/SO2 was 8.7 and nitrate/sulfate was 3.1, respectively. In this results, the nitrate component in PM1.0 was influenced by NOx from the stationary source as power plant and the mobile source around the measurement site.