中国高校体育课学生猝死事故诱因及对策分析 -基于2014〜2023年25份案例

梁慧敏,梁骁,李媛媛,李鹏程,倪景挺,李竞验,曹晓峰,林鏞澤 남서울대학교 출판국 2024 남서울대학교 논문집 Vol.30 No.-

이 연구는 중국 내 대학교 체육 수업 중 발생한 급사 사고의 사례를 분석하여 원 인과 개선 방안을 제시하고자 하였다 이를 위해 2014년부터 2023년까지 발생한 25건의 사례를 양적 질적으로 분석하여 다음과 같은 결과를 얻었다 체육 수업 중 급사는 성별로는 여학생보다는 남학생에서 계절별로는 봄과 가을에서 시간대별로는 오후보다는 오전에 많이 발생한 것으로 나타났다. 급사의 직접적 원인은 과도한 운동강도로 인한 심장의 문제와 개인의 건강 상태나 습관인 것으로 나타났으며, 간접적 원인은 학교의 안전 사고 관리 체계 기후나 계절적 요인 사고 발생 시 주변 학생들의 대처 능력 및 이상의 원인들 간의 상호 작용인 것으로 나타났다. 따라서 이러한 급사 사고의 발생을 예방하기 위해서는 학생들에 대한 스포츠 안전 교육 을 강화하고 안전 의식을 제고하여야 하며 교내 관리 체계를 개선하여 돌발 상황 대응 능력을 향상시켜야 하며 학교과 가정 사회가 학생의 건강 문제에 대해 관심을 가져야 하며 , 사고 발생에 영향을 미칠 수 있는 사회적 환경적 요인들을 고려해야 할 것이다. 주요 단어 대학생 체육 수업 사고 급사 원인 개선 방안 스포츠 안전

SOFTWARE PERFORMANCE TESTING BASED ON LINUX KERNEL

Yuan Yuan Li,Peng Xiao,Huimin Meng 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-

Linux has created a huge new playing field for enterprises, academia, and governments. But lack and instability of applications have stopped many users from strategic, wholesale migrations to Linux. With more and more applications running on Linux system, for example mozilla fire fox, openoffice, GCC, etc. the software performance testing is becoming important on Linux platform. The kernel of an operating system has a significant impact on the overall performance of a computer system [1]. To test a software performance based on system kernel can give us a unique insight into the software, provide us useful information in determining the bottlenecks and weaknesses of the software, and thus enable us to improve it. This paper discusses the methodologies of software performance testing based on Linux kernel, which include design workload, get system parameter, time measurement and CPU utilized. We have done experiments on a computer running Linux; experiment results show that the methodologies of software performance testing based on Linux kernel is completely realizable and efficacious. Even though this paper is not intended to provide a comprehensive software test suite, the methodologies presented here can be extended to build such programs.

Back-channel-etched InGaZnO thin-film transistors with Au nanoparticles on the back channel surface

Peng Xiao,Wenfeng Wang,Yingyi Ye,Ting Dong,Shengjin Yuan,Jiaxing Deng,Li Zhang,Jianwen Chen,Jian Yuan 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.2

In this paper, Au nanoparticles (NPs) were introduced on the surface of oxide thin fi lm to enhance the etching resistance of thethin fi lm, and back-channel-etched (BCE) InGaZnO (IGZO) thin fi lm transistors (TFTs) with Au NPs on the back channel surfacewere successfully fabricated. Detailed studies showed that the etching resistance of IGZO thin fi lms was enhanced signifi cantly byintroducing Au NPs on IGZO thin fi lms, and the etching resistance was enhanced with the increase of Au NPs thickness. Furthermore,Au NPs deposited by vaccum evaporation were uniformly dispersed on the IGZO surface other than forming a continuousthin fi lm. By introducing the Au NPs on the IGZO surface, we successfully patterned the S/D electrodes on Au NPs/IGZO andfabricated BCE TFTs. The IGZO-TFTs with 5-nm-thick Au NPs on the back channel surface exhibited excellent electrical characteristicwith a μ sat of 9.9 cm 2 /V s, a SS of 0.26 V/decade, a V on of 0.23 V, an I on/off of 10 6 and an off -state current of 10 −11 A. Inaddition, the introduction of Au NPs did not lead to an increase in the off -state current, which was mainly ascribed to the Schottkybarrier between Au NPs and IGZO due to the high work function of Au. It is a universal method to fabricate BCE TFTs with highelectrical performance, because it was not limited to the types of oxide materials and had no special requirements for equipment.

Transcriptome analysis of rice leaves in response to Rhizoctonia solani infection and reveals a novel regulatory mechanism

De Peng Yuan,Xiao Feng Xu,Hong Woo-Jong,Si Ting Wang,Xin Tong Jia,Yang Liu,Shuang Li,Zhi Min Li,Qian Sun,Qiong Mei,Shuai Li,정기홍,Song Hong Wei,Yuan Hu Xuan 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.5

Sheath blight disease (ShB) severely afects rice production; however, the details of defense against ShB remain unclear. To understand the rice defense mechanism against ShB, an RNA sequencing analysis was performed using Rhizoctonia solani inoculated rice leaves after 48 h of inoculation. Among them, 3417 genes were upregulated and 2532 were downregulated when compared with the control group (>twofold or<1/2). In addition, the diferentially expressed genes were classifed via Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and MapMan analyses. Fifty-nine GO terms and seven KEGG pathways were signifcantly enriched. A MapMan analysis demonstrated that the phytohormone and metabolic pathways were signifcantly altered. Interestingly, the expression levels of 359 transcription factors, including WRKY, MYB, and NAC family members, as well as 239 transporter genes, including ABC, MFS, and SWEET, were signifcantly changed in response to R. solani AG1-IA inoculation. Additionally, OsWRKY53 and OsAKT1 negatively regulate the defense response in rice against R. solani via gain of function study for OsWRKY53 and loss of function study for OsAKT1, respectively. Furthermore, several diferentially expressed genes contain R. solani-responsive cis acting regulatory elements in their promoter regions. Taken together, our analyses provide valuable information for the additional study of the defense mechanisms against ShB, and the candidate genes identifed in this study will be useful resource for future breeding to enhance resistance against ShB.

≪金文編≫四版正編中脫誤□,□,□,”于”字考

원효붕 ( Xiao Peng Yuan ),박지숙 ( Ji Sook Park ) 중국어문연구회 2014 中國語文論叢 Vol.0 No.66

本文通過三版、四版≪金文編≫的比較,對第四版中脫落的‘□’·‘□’·‘□’以及‘於’字進行了分析考察。第三版‘□’中的‘□’字下增加了≪史墻盤≫的‘□’字,當時二字可看作同壹個字。然而第四版中留≪史墻盤≫中字而刪‘□’字的理由爲, 如果將‘□’字看作‘昊’字, 則與≪史墻盤≫中的‘□’字有異,因此將此字移至別處而脫落。卽在編排第四版補加≪牆盤≫中的文字時,或將‘□’字移至‘0527두’字下,或將其刪除。‘□’字的初文爲‘□’,隸定爲‘□’字,古音同‘고’、‘두’、‘ □(□)’字,相互通用。第三版‘1681□’中收錄的‘□’(≪魚鼎匕≫)字, 隸定爲‘蚩’字, 釋爲“從寺從곤”,但不見於第四版。本文推測可能在於在修訂第四版時,將其看作合文。但從‘□’字在≪魚鼎匕≫中所屬器物的空間、文字的大小及內容上看,應與第三版壹洋看作‘(蚩)’壹個字。第三版 ‘0030□’中的 ‘□’(≪ (연)盤≫)·‘□’·‘□’(≪연鼎≫)·‘□’(≪연□보≫)字不見於第四版。本文認爲因‘0757嘗’(326頁)欄空間不足,因此只增加了‘□’(≪연肯鼎≫)字和‘□’(≪연肯盤≫)字,故刪除其他字洋。

Carotenoid Intake and Esophageal Cancer Risk: a Meta-analysis

Ge, Xiao-Xiao,Xing, Mei-Yuan,Yu, Lan-Fang,Shen, Peng Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3

This meta-analysis was conducted to evaluate the association between intake of carotenoids and risk of esophageal cancer. A systematic search using PubMed, Cochrane Library, Web of Science, Scopus, CNKI, and CBM (updated to 6 May 2012) identified ten articles meeting the inclusion criteria with 1,958 cases of esophageal cancer and 4,529 controls. Higher intake of beta-carotene, alpha-carotene, lycopene, beta-cryptoxanthin, lutein, and zeaxanthin reduced esophageal cancer risk with pooled ORs of 0.58 (95% CI 0.44, 0.77), 0.81 (95% CI 0.70, 0.94), 0.75 (95% CI 0.64, 0.86), 0.80 (95% CI 0.66, 0.97), and 0.71 (95% CI 0.59, 0.87), respectively. In subgroup analyses, beta-carotene showed protective effects against esophageal adenocarcinoma in studies located in Europe and North America. Alpha-carotene, lycopene, and beta-cryptoxanthin showed protection against esophageal squamous cell cancer. This meta-analysis suggested that higher intake of carotenoids (beta-carotene, alpha-carotene, lycopene, beta-cryptoxanthin, lutein, and zeaxanthin) is associated with lower risk of esophageal cancer. Further research with large-sample studies need to be conducted to better clarify the potentially protective mechanisms of carotenoid associations risk of different types of esophageal cancer.

Cases study on focused ion beam technology for failure analysis

Yuan Chen,Peng Zhang,Xiao-Wen Zhang,Ping Lai 한국신뢰성학회 2019 International Journal of Reliability and Applicati Vol.20 No.2

Miniaturization is the core of modern electronic product. Many of the semiconductor devices used in modern products are becoming smaller and smaller. Conventional defects recognition techniques face a great challenge. Then because of the ability of micro-fabrication at the micrometer or nanometer level the focused ion beam (FIB) technology has become one of the most necessary defects recognition and failure mechanism study tools for semiconductor device in the past several years. The FIB technology is particularly effective for analyzing the root failure cause in semiconductor active area. Sometimes you have an interest in a structure or defect that is buried under the surface of the semiconductor devices. Then you can make a rough cut in the possible locations. This paper describes the FIB technique for defects recognition in semiconductor devices. Several failure mechanisms have been identified, including kirkendall effect, gate oxide layer defect, and dielectric breakdown.

Control of Electrically Excited Synchronous Motors with a Low Switching Frequency

Yuan, Qing-Qing,Wu, Xiao-Jie,Dai, Peng,Fu, Xiao The Korean Institute of Power Electronics 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.4

The switching frequency of the power electronic devices used in large synchronous motor drives is usually kept low (less than 1 kHz) to reduce the switching losses and to improve the converter power capability. However, this results in a couple of problems, e.g. an increase in the harmonic components of the stator current, and an undesired cross-coupling between the magnetization current component ($i_m$) and the torque component ($i_t$). In this paper, a novel complex matrix model of electrically excited synchronous motors (EESM) was established with a new control scheme for coping with the low switching frequency issues. First, a hybrid observer was proposed to identify the instantaneous fundamental component of the stator current, which results in an obvious reduction of both the total harmonic distortion (THD) and the low order harmonics. Then, a novel complex current controller was designed to realize the decoupling between $i_m$ and $i_t$. Simulation and experimental results verify the effectiveness of this novel control system for EESM drives.

Rotor Initial Position Estimation Based on sDFT for Electrically Excited Synchronous Motors

Yuan, Qing-Qing,Wu, Xiao-Jie,Dai, Peng The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.3

Rotor initial position is an important factor affecting the control performance of electrically excited synchronous motors. This study presents a novel method for estimating rotor initial position based on sliding discrete Fourier transform (sDFT). By injecting an ac excitation into the rotor winding, an induced voltage is generated in stator windings. Through this voltage, the stator flux can be obtained using a pure integral voltage model. Considering the influence from a dc bias and an integral initial value, we adopt the sDFT to extract the fundamental flux component. A quadrant identification model is designed to realize the accurate estimation of the rotor initial position. The sDFT and high-pass filter, DFT, are compared in detail, and the contrast between dc excitation and ac injection is determined. Simulation and experimental results verify that this type of novel method can eliminate the influence of dc bias and other adverse factors, as well as provide a basis for the control of motor drives.

Effect of Tea on Resistance to Type 2 Diabetes

Peng Lu,Kai Fan,Ya-Ting Lu,Yuan-Xu Shi,Dong-Mei Fan,Xiao-Chang Wang 한국차학회 2015 한국차학회지 Vol.- No.S

Insulinotropic hormone glucagon-like peptide-1 (GLP-1) degrades rapidly under the catalytic of dipeptidyl peptidase IV (DPP-IV). Consequently, DPP-IV which is widely expressed in small intestine takes a key role in the prevention and treatment of Type 2 Diabetes. To identify the capability of anti-type 2 diabetes by tea, the inhibition of different types of Chinese teas on DPP-IV was tested. The inhibitory ratio of Buddha Longjing is 31.74%, Tangji Gaoshan Tea is 62.08% (p < 0.01), Yunnan black tea is 66.29% (p < 0.01), Lapsang souchon is 76.40% (p <0.01), Dahongpao is 62.08% (p < 0.01), Tieguanyin is 66.85% (p < 0.01), Moganhuangya is 65.45% (p < 0.01),Huoshanhuangya is 50.56% (p < 0.05).