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Thermal creep behavior of CZ cladding under biaxial stress state
Jin, Xin,Lin, Yuyu,Zhang, Libin Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12
Thermal creep is a key property of zircaloy cladding. CZ developed by CGN is a new zircaloy used as PWR fuel cladding. This research is devoted to investigating the thermal creep behavior of CZ and build the thermal creep model of CZ. Twenty internal pressure creep tests were conducted, and the ranges of temperature and Tresca stress were 320-430 ℃ and 70-300 MPa, respectively. Real-time creep data were analyzed by separating primary creep and steady-state creep. Based on Soderberg model and creep test data, CZ thermal creep model is derived. As a whole, the mean value and the standard deviation of P/M of CZ saturated primary creep strain are very close to these from steady-state creep rate, however, the predictive effect of primary creep is less satisfactory. Four conditions, where there exists large deviation between predicted values and test data, are 320 ℃ and 300 MPa, 350 ℃ and 190 MPa, 380 ℃ and 160 MPa, 380 ℃ and 190 MPa, respectively. As primary creep was much smaller than steady-state creep in long-time operation, the thermal creep model built can be applied to predict the thermal creep behavior of CZ cladding.
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Jin, Xin,Eom, Myunghwan,Chwa, Dongkyoung The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.5
In this paper, a novel traffic flow control method based-on ramp metering and speed regulation using an adaptive sliding mode control (ASMC) method along with a deadzoned parameter adaptation law is proposed at a stochastic macroscopic level traffic environment, where the influence of the density and speed disturbances is accounted for in the traffic dynamic equations. The goal of this paper is to design a local traffic flow controller using both ramp metering and speed regulation based on ASMC, in order to achieve the desired density and speed for the maintenance of the maximum mainline throughput against disturbances in practice. The proposed method is advantageous in that it can improve the traffic flow performance compared to the traditional methods using only ramp metering, even in the presence of ramp storage limitation and disturbances. Moreover, a prior knowledge of disturbance magnitude is not required in the process of designing the controller unlike the conventional sliding mode controller. A stability analysis is presented to show that the traffic system under the proposed traffic flow control method is guaranteed to be uniformly bounded and its ultimate bound can be adjusted to be sufficiently small in terms of deadzone. The validity of the proposed method is demonstrated under different traffic situations (i.e., different initial traffic status), in the sense that the proposed control method is capable of stabilizing traffic flow better than the previously well-known Asservissement Lineaire d'Entree Autoroutiere (ALINEA) strategy and also feedback linearization control (FLC) method.
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Jin Xin 한국어교육학회 2016 국어교육 Vol.0 No.153
Subordinating to Chinese education, Korean-Chinese education is an integral part of minority education in China. As a major subject in Korean-Chinese school, Korean education plays a significant role in inheriting its own language. The core of Korean language and literature education lies in literature education which is the cornerstone of consolidating and developing this ethnic community. The evaluation of literature education in Korean-Chinese senior high school is given in accordance of a major subject--Korean language and literature. In addition, comprehensive requirements and contents of the evaluation are reflected by 『Standard of Korean Language and Literature Curriculum』. Literature education help students understand and appreciate literature, experience various and dynamic works, cultivate students’ aesthetic recognition and insight to grow up as human beings with desirable traits. The paradigm of literature education including concepts, development directions, and detailed teaching-learning practices has its own importance. However, evaluation is also an indispensible part that cannot be ignored. This paper focuses on observation and contemplation of “teaching and learning evaluation” from the “curriculum implementation” of 『Standard of Korean Language and Literature Curriculum』in Korean-Chinese senior high school to search for future research topics which conforms to times.
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Jin Xin,김여진 한국철학상담치료학회 2023 철학 실천과 상담 Vol.13 No.-
With the development of information technology and the Internet of Things, the distance between people has decreased. This has brought great convenience to people’s lives, but it has also greatly changed human life. Video games and short videos have become dominant forms of entertainment, significantly influencing children's attention and time allocation. Children should be learning and developing, but entertainment that primarily focuses on superficial engagement and instant gratification have invaded children’s lives, making it difficult for them to think deeply. This has resulted in many social problems. As an emerging discipline, philosophy for children (P4C) invites us to investigate how to improve children’s mental lives, allowing them to engage in independent thinking and judgment in the era of the decline of critical thinking skills and reflective capacities. This paper introduces the origin of P4C, explores its educational principles and methodologies, and presents two case studies illustrating its application in fostering collaborative learning with children in a hyper-connected society, thus illustrating the potential of P4C in addressing societal challenges arising from technological development, including issues like existential meaninglessness, depression, social isolation, and excessive gaming.
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Ginseng consumption and risk of cancer: A meta-analysis
Jin, Xin,Che, Dao-biao,Zhang, Zhen-hai,Yan, Hong-mei,Jia, Zeng-yong,Jia, Xiao-bin The Korean Society of Ginseng 2016 Journal of Ginseng Research Vol.40 No.3
Background: The findings of currently available studies are not consistent with regard to the association between the risk of cancer and ginseng consumption. Therefore, we aimed to evaluate this association by conducting a meta-analysis of different studies. Methods: To systematically evaluate the effect of ginseng consumption on cancer incidence, six databases were searched, including PubMed, Ovid Technologies, Embase, The Cochrane Library, China National Knowledge Infrastructure, and Chinese VIP Information, from 1990 to 2014. Statistical analyses based on the protocol employed for a systematic review were conducted to calculate the summary relative risks (RRs) and 95% confidence intervals (CIs). Results: We identified nine studies, including five cohort studies, three case-control studies, and one randomized controlled trial, evaluating the association between ginseng consumption and cancer risk; these studies involved 7,436 cases and 334,544 participants. The data from the meta-analysis indicated a significant 16% lower risk of developing cancer in patients who consumed ginseng (RR = 0.84, 95% CI = 0.76-0.92), with evidence of heterogeneity (p = 0.0007, $I^2$ = 70%). Stratified analyses suggested that the significant heterogeneity may result from the incidence data for gastric cancer that were included in this study. Publication bias also showed the same result as the stratified analyses. In addition, subgroup analyses for four specific types of cancer (colorectal cancer, lung cancer, gastric cancer, and liver cancer) were also performed. The summary RRs for ginseng intake versus no ginseng consumption were 0.77 for lung cancer, 0.83 for gastric cancer, 0.81 for liver cancer, and 0.77 for colorectal cancer. Conclusion: The findings of this meta-analysis indicated that ginseng consumption is associated with a significantly decreased risk of cancer and that the effect is not organ specific.
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Jin, Xin,Zhang, Ke-Jin,Guo, Xu,Myers, Ronald,Ye, Zhong,Zhang, Zhi-Pei,Li, Xiao-Fei,Yang, Hu-Shan,Xing, Jin-Liang Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Over-expression of de novo lipogenesis (DNL) genes is associated with the prognosis of various types of cancers. However, the effects of single nucleotide polymorphisms (SNPs) in these genes on recurrence and survival of non-small cell lung cancer (NSCLC) patients after surgery are still unknown. In this study, a total of 500 NSCLC patients who underwent surgery treatment were included. Eight SNPs in 3 genes (ACACA, FASN and ACLY) of the DNL pathway were examined using the Sequenom iPLEX genotyping system. Multivariate Cox proportional hazards regression and Kaplan-Meier curves were used to analyze the association of SNPs with patient survival and tumour recurrence. We found that two SNPs in the FASN gene were significantly associated with the recurrence of NSCLC. SNP rs4246444 had a significant association with lung cancer recurrence under additive model (hazard ratio [HR], 0.82; 95% confidence interval [95%CI], 0.67-1.00; p=0.05). Under the dominant model, rs4485435 exhibited a significant association with recurrence (HR, 0.75; 95%CI, 0.56-1.01; p=0.05). Additionally, SNP rs9912300 in ACLY gene was significantly associated with overall survival in lung cancer patients (HR, 1.41; 95%CI, 1.02-1.94, p=0.04) under the dominant model. Further cumulative effect analysis showed moderate dose-dependent effects of unfavorable SNPs on both survival and recurrence. Our data suggest that the SNPs in DNL genes may serve as independent prognostic markers for NSCLC patients after surgery.
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