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고칼슘혈증을 보인 폐암환자에서 부갑상선호르몬(PTH)과 부갑상선호르몬관련단백질(PTHrP)이 동시에 증가된
김유일 ( Yu Il Kim ),김규식 ( Kyu Sik Kim ),유영권 ( Young Kwon Yu ),박창민 ( Chang Min Park ),임명수 ( Myung Soo Rim ),고경행 ( Kyung Haeng Ko ),황준화 ( Jun Hwa Hwang ),박형관 ( Hyeong Kwan Park ),임성철 ( Sung Chul Lim ),김영철 대한결핵 및 호흡기학회 1999 Tuberculosis and Respiratory Diseases Vol.47 No.4
분석 문맥 조절 기법을 이용한 버퍼 오버플로우 분석의 중복 경보 제거
김유일(Youil Kim),한환수(Hwansoo Han) 한국정보과학회 2010 정보과학회논문지 : 소프트웨어 및 응용 Vol.37 No.12
버퍼 오버플로우 취약점을 검출하는 정적 분석 도구에서, 분석 문맥을 조절하는 방법을 통해, 동일한 원인에 의해 발생하는 중복 경보 메시지를 제거하는 방법을 제안한다. 동일한 원인에 의해 다수의 경보 메시지가 출력되는 경우, 첫 경보 메시지만 살펴보아도 나머지 경보 메시지들에 대한 판단을 내릴 수 있으므로, 사용자에게 첫 경보 메시지만을 보여주는 것이 보다 바람직하다. 제안하는 분석 문맥 조절기법은 기존의 정적 분석 도구에 쉽게 적용할 수 있고, 오픈 소스 소프트웨어를 사용한 실험에서 평균 23%의 경보 메시지를 제거할 수 있었다. In order to reduce the efforts to inspect the reported alarms from a static buffer overflow analyzer, we present an effective method to filter out redundant alarms. In the static analysis, a sequence of multiple alarms are frequently found due to the same cause in the code. In such a case, it is sufficient and reasonable for programmers to examine the first alarm instead of the entire alarms in the same sequence. Based on this observation, we devise a buffer overflow analysis that filters out redundant alarms with our context refinement technique. Our experiment with several open source programs shows that our method reduces the reported alarms by 23% on average.
슈반세포와 골수간엽줄기세포의 공배양이 골수간엽줄기세포의 분화와 증식에 미치는 영향(2)
김초민 ( Cho Min Kim ),김순희 ( Soon Hee Kim ),송이슬 ( Yi Seul Song ),정수현 ( Su Hyun Jung ),박종학 ( Jong Hak Park ),오재민 ( Jae Min Oh ),이동원 ( Dong Won Lee ),유일수 ( Il Sou Yoo ),이종문 ( John M Rhee ),강길선 ( Gil Son Kh 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.4
Schwann cell(SC) play an important role as they are the source of different trophic substances and present a great neurotrophic activity. Bone marrow stromal cells(BMSCs) contain mesenchymal stem cell and progenitor cells. BMSCs can differentiate into various cell types, including muscle and brain cell. The aim of this study is to investigate the differentiation of BMSCs through co-culture system with SCs. Pure SCs and BMSCs were cultured as control group. Expression of GFAP, P75 and NF were determined by immunocytochemical staining and reverse transcriptase polymer chain reaction(RT-PCR) was conducted to confirm mRNA expression of NF and NSE in BMSCs co-cultured with SCs. Following co-culture time with SCs, BMSCs underwent morphological changes similar to those of cultured SCs and stained positively for GFAP, P75 and NF protein. Electrophoresis analysis revealed that the levels of NF and NSE on BMSC co-cultured with SCs related with other group maintained up to 21 days. Our results showed that BMSCs able to differentiate into SC-like cells using co-culture system in vitro. These findings could be helpful for the development of the cell-based therapeutic strategies for CNS repair.
해외서지정보를 활용한 북한 과학기술 연구개발 트렌드 변화분석(1986~2019)
김유일(You Eil Kim) 한국콘텐츠학회 2021 한국콘텐츠학회논문지 Vol.21 No.4
대외적인 활동이 거의 없던 북한에서 최근 해외 논문발표가 급증하고 있다. 본 연구에서는 북한의 해외발표 논문을 계량분석하여 북한의 연구개발 동향변화를 파악하고, 향후 국내 연구자들과의 공동연구로 발전시킬 수 있는 가능성을 모색하고자 한다. 이를 위해 1986년 이후 북한 연구자가 포함된 해외발표논문을 대상으로 빈도분석과 네트워크 분석을 실시하였다. 분석은 저자, 연구기관, 국가, 연구분야 등을 대상으로 하였으며, 김정은 집권 전과 후로 구분하여 변화를 분석하였다. 분석결과에 따르면 김정은 집권 후 8년간 해외논문 발표가 급격히 증가하면서, 논문발표 상위 연구자나 연구기관, 공동연구 영향력 상위 연구자 등의 구성도 많은 변화가 나타났다. 김정은 집권 후 북한 연구자나 연구기관의 비중이 상대적으로 증가하였으며, 공동연구 영향력 상위 연구자들간 네트워크 컴포넌트가 형성되어 있어서 특정 연구주제에 집중하는 모습이 관찰되었다. 북한 연구자들의 주요한 해외 협동연구자나 연구기관은 중국의 비중이 높게 나타났다. In North Korea, where there was little external activity, the number of overseas academic paper publications has recently increased. This study aims to quantitatively analyze North Korean papers published abroad to identify changes in North Koreas research and development trends, and to explore the possibility of developing them through joint research with domestic researchers in the future. To this end, since 1986, frequency analysis and network analysis have been conducted on papers published overseas including North Korean researchers. The analysis was conducted on authors, research institutes, countries, and research fields, and changes were analyzed before and after Kim Jong-un took office. According to the results of the analysis, as the number of foreign papers published rapidly increased during the eight years after Kim Jong-un took office, the composition of the top researchers, research institutes, and researchers with high influence in joint research also changed a lot. After Kim Jong-un came to power, the proportion of North Korean researchers and research institutes increased relatively, and a network component was formed between researchers with high influence on joint research, so it was observed that they focused on specific research topics. It was found that the major foreign collaborators or research institutes of North Korean researchers were from China.
도시공원.녹지의 시민만족도 모형 - 안양시를 사례로 한 교류적 접근 -
김유일,김정규,안진성,최아현,Kim, Yoo-Ill,Kim, Jung-Gyu,An, Jin-Sung,Choi, A-Hyun 한국조경학회 2010 韓國造景學會誌 Vol.38 No.3
본 연구의 목적은 도시공원과 녹지공간의 이용과 미적 측면에서 도시민들이 중요하게 가치를 두고 있는 요인들을 평가하고, 다양한 공원녹지 요소에 대해 이용자 만족도 변화를 다루는 방법을 찾는 것이다. 이를 위해서 본 연구에서는 안양시의 1999년과 2007년의 환경의 질을 평가하기 위해 교류적 접근방법을 이용한 동적모형과 공원녹지만족도 개념모형을 발전시킨다. 그리고 실증적 연구방법으로 1999년과 2007년의 공원녹지 환경 조사와 1999년의 573개, 2007년의 982개의 설문을 포함한다. 분석결과, 첫째, 공원녹지만족도의 가장 중요한 요인은 '도시공원'이고, 그 다음으로 '도시경관'이었다. 둘째, 모형에서 공원녹지만족도는 도시거주성과 경관의 질을 포함한 도시환경의 질적 만족도의 원인이 된다. 셋째, 요인분석결과, 평가인자는 도시경관, 도시녹지, 선형시설, 도시공원, 하천녹지, 산림녹지의 6개 요인이었으며 2007년에는 시민들이 참여한 '안양천 되살리기 운동'으로 인해 하천녹지 요인이 새로이 나타났다. 넷째, 교류적 관점에서 환경변화 결과는 시민들의 태도변화 측면, 안정성 측면의 양면을 보여주고 있다. 만족도는 향상되었지만 대부분의 요인에서 만족-불만족 항목의 패턴은 변화되지 않았다. 녹도를 포함한 하천녹지와 선형시설(보행자전용도로, 자전거도로, 조깅로 등)은 긍정적으로 변화되었다. 2007년에 공원녹지만족도는 안양시의 노력과 시민운동으로 조성된 도시공원 및 하천과 녹도로 인해 두드러지게 향상되었다. This study aims to examine what factors citizens value in urban parks and green spaces in terms of usage and aesthetic value and to find ways to deal with the changing patterns of user satisfaction for these various green elements. To achieve this, the study developed a dynamic model employing a transactional approach to evaluate environmental quality for 1999 and 2007 in Anyang City as well as a conceptual model of parks and greens satisfaction. This study relied on an empirical study method including the 1999 and 2007 green conditional survey and citizen questionnaires totaling 573 in the year 1999 and 982 in the year 2007. As a result, first, the factor 'urban parks' is the most important factor and 'cityscape' is the second most important factor in parks and greens satisfaction(PGS). Second, PGS in turn causes environmental quality satisfaction(EQS), which is related to two items--'urban livability' and 'aesthetic quality'--in the model. This means that PGS is the intervening variable of urban livability. Third, the factor analysis resulted in six factors: cityscape, urban green, linear facilities, urban parks, riverside green, and urban forest. 'Riverside green' emerged as a factor in 2007 as a result of public participation in the 'Anyang River Revitalization Project'. Fourth, through a transactional view, the environmental changes result in either a change in or stability of public attitude. The levels of satisfaction were elevated but patterns of satisfied-unsatisfied items remained unchanged for most factors. The perception of riverside a greenway and linear surface facilities(pedestrian walkways, biking and jogging trails, etc.) have changed positively. PGS changed significantly in 2007, as a result of urban events and development, including parks, rivers and greenways which were built through the joint effort of the local government and civic participation.
초보자에서 ProSeal(TM) 후두마스크(LMA)의 집게손가락 삽입법과 도관 유도 삽입법의 비교
김유일 ( Yu Yil Kim ),이상귀 ( Sang Kyi Lee ),이지선 ( Ji Sun Yi ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.56 No.6
Background: Insertion of a ProSeal(TM) laryngeal mask airway (PLMA(TM)) by experienced users was more successful with using a catheter-guided (CG) technique than a digital technique. The purpose of this study is to assess the efficacy of the CG insertion technique for a PLMA(TM) by inexperienced personnel. Methods: Forty patients aged 18-65 yr and who were undergoing general anesthesia were randomly allocated to the index finger (IF) or CG insertion techniques for PLMA(TM) insertion. The IF technique was performed with the routine insertion technique. The CG technique was performed using a catheter inserted PLMA(TM), which was primed into the drain tube of the PLMA(TM) with using a soft flexible catheter. Successful insertion was primarily judged by the clinical function of the airway. The number of insertion attempts and the insertion time were recorded. Postoperative airway morbidity (sore throat, dysphonia, dysphagia) was assessed at 24 hr postoperatively. Results: The success rate was similar between the groups (IF, 18/20; CG, 15/20). The successful insertion time (the time to provide an effective airway) was similar between the groups but the insertion time at the first attempt was shorter for the IF technique (IF, 21.6±5.3 s; CG, 27.4±10.3 s). There were no differences between the groups for the postoperative airway morbidity. Conclusions: This study suggests that the CG insertion technique is not a useful alternative technique for inexperienced personnel. (Korean J Anesthesiol 2009; 56: 634~8)