International Young Doctors` Session : Session 4 ; Alteration of vascularization in preeclamptic placentas measured by three-dimensional power doppler ultrasound

( Cheng Ran Peng ),( Chen Yu Chen ),( Kuo Gon Wang ),( Fang Ju Sun ),( Chie Pein Chen ) 대한산부인과학회 2013 서울심포지움 Vol.18 No.-

Life-Style Habits in a High-Risk Area for Upper Gastrointestinal Cancers: a Population-Based Study from Shanxi, China

Cheng, Yi-Kun,Yao, Shang-Man,Xu, Yi-Ran,Niu, Run-Gui Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.9

Background: Cancer is a burden on humanity and ranks as a leading cause of morbidity and mortality in China. Shanxi province has its unique cancer patterns and the burden is increasing. In this study, we aimed to assess the pattern of dietary habits and life-style in Shanxi, a high-risk area for upper gastrointestinal cancers in China and further evaluate the trends in cancer incidence and mortality based on registered data. Materials and Methods: Data on lifestyle, diet, physical activity were obtained from the household health survey at Zhongyang from 2013 to 2015. Cancer diagnoses were reported to Shanxi Center for Disease Control and Prevention (SCDCP). Population-based cancer incidence data and mortality data of 2012 were collected from the SCDCP. All incidence and death rates were expressed per 100,000 populations. Univariate analysis was performed using the Chi-squared test or Fisher's exact test. Results: Overall, deficiencies in fresh fruits and vegetable food, and intake of hot food, salted food, or pickled food are serious problems in Shanxi, especially in rural areas. Upper gastrointestinal cancers were the most commonly diagnosed cancers, and the incidence in rural areas is higher than those in urban areas. Cervical cancer is the most common cancer for females. Moreover, the agespecific incidence exhibited an increased trend before 40 years old. Consistent with the previous literature, our epidemiological investigation results suggest that lifestyle, nutrition deficient, and infections were major risk factors for upper gastrointestinal cancers or cervical cancer in Shanxi. Facing a serious situation, we further explored defensible recommendations for the general public in order to promote changes in environments that support healthful eating and physical activity habits, to reduce cancer risk. Conclusions: Our results present the current cancer trends in Shanxi and its related etiologic risk factors and provide a theoretical basis to guide public health efforts to prevent and control cancers in the province.

High Char-Yield in AN-AM Copolymer by Acidic Hydrolysis of Homopolyacrylonitrile

Run Cheng,You Zhou,Jing Wang,Yumin Cheng,Seungkon Ryu,Riguang Jin 한국탄소학회 2013 Carbon Letters Vol.14 No.1

Acrylonitrile (AN)-acrylamide (AM) copolymers were prepared by nitric acidic hydrolysis of homopolyacrylonitrile. The acrylamino group increased as a function of hydrolysis time, while crystallinity decreased. Differential scanning calorimetry and a thermal gravimetric analysis indicated that the acylamino introduced by acidic hydrolysis effectively enhanced the cyclization reaction at low temperature due to the change of the cyclization reaction mechanism. Char-yield of AN-AM copolymers also gradually increased with increasing hydrolysis time. The maximum char-yield was 49.48% when hydrolized at 23°C in 65% nitric acid solution for 18 h, which was 30% higher than that of non-acidic hydrolysis of homopolyacrylonitrile. Simulation of the practical process also showed an increase of char yields, where the char yields were 55.43% and 62.60% for homopolyacrylonitrile and copolyacrylonitrile, respectively, with a hydrolysis time of 13 h.

Identification of Prostate Cancer LncRNAs by RNA-Seq

Hu, Cheng-Cheng,Gan, Ping,Zhang, Rui-Ying,Xue, Jin-Xia,Ran, Long-Ke Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.21

Purpose: To identify prostate cancer lncRNAs using a pipeline proposed in this study, which is applicable for the identification of lncRNAs that are differentially expressed in prostate cancer tissues but have a negligible potential to encode proteins. Materials and Methods: We used two publicly available RNA-Seq datasets from normal prostate tissue and prostate cancer. Putative lncRNAs were predicted using the biological technology, then specific lncRNAs of prostate cancer were found by differential expression analysis and co-expression network was constructed by the weighted gene co-expression network analysis. Results: A total of 1,080 lncRNA transcripts were obtained in the RNA-Seq datasets. Three genes (PCA3, C20orf166-AS1 and RP11-267A15.1) showed a significant differential expression in the prostate cancer tissues, and were thus identified as prostate cancer specific lncRNAs. Brown and black modules had significant negative and positive correlations with prostate cancer, respectively. Conclusions: The pipeline proposed in this study is useful for the prediction of prostate cancer specific lncRNAs. Three genes (PCA3, C20orf166-AS1, and RP11-267A15.1) were identified to have a significant differential expression in prostate cancer tissues. However, there have been no published studies to demonstrate the specificity of RP11-267A15.1 in prostate cancer tissues. Thus, the results of this study can provide a new theoretic insight into the identification of prostate cancer specific genes.

Influence of "Historical Effects" on the Rheological Properties of a Polyacrylonitrile Copolymer Solution

Yumin Cheng,Huibo Zhang,Shuangkun Zhang,Weiwei Liu,Jing Wang,Run Cheng,SeungKon Ryu,Riguang Jin 한국탄소학회 2013 Carbon Letters Vol.14 No.1

Polyacrylonitrile (PAN) copolymers of different molecular weights were synthesized by a suspension polymerization and precipitation polymerization method. The rheology behaviors of the synthesized PAN copolymers were investigated in relation to their molecular weight, solid content and melting temperature. The influence of "historical effects" on the spinning solution of PAN was studied by analyzing the laws of viscosity considering the diversification time and temperature. The viscosity disciplines of each spinning solution conformed well to the rheological universal laws in a comparison of the suspension polymerization product with that of precipitation polymerization. Viscosity changes in the swelling process of dissolution were gentler in the suspension polymerization product; a small amount of water will quickly debase the solution viscosity, and high-speed mixing can greatly shorten the time required by the spinning solution to reach the final viscosity.

외자은행 진입이 중국 은행 생산성에 미친 영향 분석

정연(Ran Cheng),우챠오(Chao Wu),오근엽(Keunyeob Oh) 한국경제통상학회 2017 경제연구 Vol.35 No.3

본 연구에서는 2008-2015년 중국의 대표적 은행들의 데이터를 이용하여 외자은행 진입이 중국 은행의 생산성 성과에 미치는 영향을 분석하였다. 생산성 변화를 측정하기 위해 DEA 방법의 SBM모형을 이용한 Malmquist지수를 계산하였으며 그 결과를 여러 변수에 대해 회귀 분석하였다. 특히 무수익여신을 바람직하지 않은 산출 변수로 포함하여 본 논문의 차별성이 부 각될 수 있었으며 다음의 결과를 얻었다. 첫째, 외자은행의 진입이 대체로 중국 은행들의 생산성에 (+)의 방향으로 영향을 미친 것으로 나타나고 있다. 둘째, 외자은행은 무수익여신이 고려되었을 때의 생산성에 더 큰 영향을 미치는 것으로 나타났다. 셋째, 국내은행들의 생산성 증가는 효율성 증가보다는 기술진보에 의한 것으로 나타났다. After China became a member of the WTO in 2002, it experienced an acceleration in the opening of banking industry. This paper collected a panel data of 14 Chinese banks from 2008 to 2015 in order to analyse the effects of FBE(foreign bank entries) on the productivities of Chinese banks. First, we used the DEA-SBM model to measure the Malmquist-Luenberger index considering non-performing loans(NPL) and the Malmquist index without taking these loans into account. Second, through the multiple linear regression model, we tested the effect of foreign banks entries on the Chinese banks. The results of our paper lead to the conclusion that there is a positive correlation between the entries of foreign banks and the two Malmquist indices. The size of the effects was larger when we consider the NPL as undesirable output in the analysis. In addition, the increase of the productivity seems to be from the technology progress rather than the efficiency improvement.

科學發展觀与大學的理念

?潤成(Run-Cheng Jin) 중국어문논역학회 2005 中國語文論譯叢刊 Vol.16 No.-

현재 중국의 고등교육의 발전이 가속기에 접어들었다. 고등교육의 번영과 발전은 우리로 하여금 과학발전관의 지도 하에서 일련의 문제들을 고려하도록 한다. 시대의 요구를 고려하여 고등교육의 수준을 대하여야 한며, 그 수준에 영향을 미치는 원인을 탐구해야 한다. 협력과 조화를 통하여 지속적으로 발전하는 사상, 이를테면 개혁과 안정, 사범교육과 종합교육, 과학기술정신과 인문정신 등의 관계를 원활하게 처리하여야 한다. 효율을 원칙으로 과학적인 관리의 개념을 수립하여야하며, 직책을 분명히 하여 직무책임제를 강화시킴으로써 각 부문의 업무가 안정되고 질서 있게, 긴장과 이완을 알맞게 조절하며 진행되게 해야 한다.

Inconel 625 합금의 레이저 클래딩을 통한 Ti-6Al-4V의 표면물성 향상에 관한 연구

정호연(Ho Ran Cheng),조유빈(Yu Bhin Cho),김홍석(Hong Seok Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

Inconel 625 합금의 레이저 클래딩을 통한 Ti-6Al-4V의 표면물성 향상에 관한 연구

정호연(Ho Ran Cheng),조유빈(Yu Bhin Cho),김홍석(Hong Seok Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

Microstructure Evolution and Mechanical Performances of SiCf Reinforced (Al3Ti + Al3Ni)-Based Metallic–Intermetallic Laminate Composite

Yuqiang Han,Qinghua Que,Ran Cheng,Ran Cheng,Chunfa Lin,Wenqing Han,Enhao Wang,Junyi Zhu,Haoran Yan 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10

In present work, a novel SiCfreinforced (Al3Ti + Al3Ni)-based metallic–intermetallic laminate (Ti–(Al3Ti + Al3Ni)/SiCf-MIL) composite without centerline defect was prepared using Ti, Al foils, NiTi wires and SiC fibers by vacuum hot pressingsintering method. Electron backscatter diffraction was employed to characterize the microstructure and phase constituents ofTi–(Al3Ti + Al3Ni)/SiCf-MIL composite during various stages of preparation process. The elimination mechanism of intermetalliccenterline was discussed. Besides, quasi-static compressive performance and fracture toughness of the synthesizedcomposite were investigated. The experimental results indicated that as reaction time increasing, the NiTi/Al interfacialreaction occurred prior to the Ti/Al interfacial reaction to form an Al3Ti/Al3Ni zone. Then, the oxides gathered at the frontof Ti/Al interfacial reaction layer were dispersed in the intermetallic layer rather than being pushed together to generate thecenterline due to the Al3Ti/Al3Ni zone. After reaction, there were no residual NiTi phases and intermetallic layers mainlyconsisting of Al3Tiand Al3Niphases were obtained in this composite. In addition, high angle grain boundaries in Al3Tigrains occupied a large proportion, conversely, low angle grain boundaries dominated in Al3Nigrains. Furthermore, stressconcentration appears at the interface between layers instead of along the middle plane of intermetallic layer. Moreover,both compressive strength and fracture toughness of the composite are superior in comparison with SiCfreinforced Ti–Al3Timetallic–intermetallic laminate composite (Ti–Al3Ti/SiCf-MIL) ascribed to the elimination of centerline.