China`s Soft Nationalist Strategy: Making North Korea a Neutralized and Stable Buffer State

( Xiao Xiong Yi ) 국방대학교 안보문제연구소 2001 The Korean Journal of Security Affairs Vol.6 No.2

A Neutralized Korea? The North-South Rapprochement and China`s Korea Policy

( Xiao Xiong Yi ) 한국국방연구원 2000 The Korean Journal of Defense Analysis Vol.12 No.2

It was China`s performance in Korea in the early 1950s that earned the People`s Republic its great-power status, and it is here where Beijing sees the charge that China is set on becoming a global power and a regional "hegemon" will be tested again. To maintain close relations with both Koreas simultaneously is a dominant goal in China`s Korea policy, but Beijing`s Korea policy now appears to be conducted under its dual strategic view of zero-sum competition regarding China-US/Japan relations and non-zero-sum cooperation with the two Koreas. Beijing and Seoul agree on many major issues, including Korean reunification, but not on Pyongyang- Washington detente. China may become increasingly concerned about the future orientation of ROK-­us military alliance and will pursue a proactive North Korea policy in the coming years, especially in the economic area. China does not, however, see its relations with two Koreas as a seesaw contest between the North and South and will continue its efforts in maintaining and enhancing stable relations with both North and South Korea. Beijing`s long-term strategic concerns is not whether there will be two Koreas or one reunified Korea, but how to reduce US influence there. Although China prefers a status quo on the peninsula, it may have little choice but to accept a unified Korea-but would not toler­ate a unified Korea under US leadership. To Beijing, China`s national security requires a strategically neutralized Korean peninsula.

Tailoring fabric geometry of plain-woven composites for simultaneously enhancing stiffness and thermal properties

Xiao-Yi Zhou,Neng-Wei Wang,Wen Xiong,Xin Ruan,Shao-Jin Zhang 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.42 No.4

This paper proposes a numerical optimization method to design the mesoscale architecture of textile composite for simultaneously enhancing mechanical and thermal properties, which compete with each other making it difficult to design intuitively. The base cell of the periodic warp and fill yarn system is served as the design space, and optimal fibre yarn geometries are found by solving the optimization problem through the proposed method. With the help of homogenization method, analytical formulae for the effective material properties as functions of the geometry parameters of plain-woven textile composites were derived, and they are used to form the inverse homogenization method to establish the design problem. These modules are then put together to form a multiobjective optimization problem, which is formulated in such a way that the optimal design depends on the weight factors predetermined by the user based on the stiffness and thermal terms in the objective function. Numerical examples illustrate that the developed method can achieve reasonable designs in terms of fibre yarn paths and geometries.

Parecoxib: an Enhancer of Radiation Therapy for Colorectal Cancer

Xiong, Wei,Li, Wen-Hui,Jiang, Yong-Xin,Liu, Shan,Ai, Yi-Qin,Liu, Rong,Chang, Li,Zhang, Ming,Wang, Xiao-Li,Bai, Han,Wang, Hong,Zheng, Rui,Tan, Jing Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2

Background: To study the effect of parecoxib, a novel cyclooxygenase-2 selective inhibitor, on the radiation response of colorectal cancer (CRC) cells and its underlying mechanisms. Materials and Methods: Both in vitro colony formation and apoptosis assays as well as in vivo mouse xenograft experiments were used to explore the radiosensitizing effects of parecoxib in human HCT116 and HT29 CRC cells. Results: Parecoxib sensitized CRC cells to radiation in vitro with a sensitivity enhancement ratio of 1.32 for HCT116 cells and 1.15 for HT29 cells at a surviving fraction of 0.37. This effect was partially attributable to enhanced apoptosis induction by parecoxib combined with radiation, as illustrated using an in vitro apoptosis assays. Parecoxib augmented the tumor response of HCT116 xenografts to radiation, achieving growth delay more than 20 days and an enhancement factor of 1.53. In accordance with the in vitro results, parecoxib combined with radiation resulted in less proliferation and more apoptosis in tumors than radiation alone. Radiation monotherapy decreased microvessel density (MVD) and microvessel intensity (MVI), but increased the hypoxia level in xenografts. Parecoxib did not affect MVD, but it increased MVI and attenuated hypoxia. Conclusions: Parecoxib can effectively enhance radiation sensitivity in CRC cells through direct effects on tumor cells and indirect effects on tumor vasculature.

Synchronous tele-ultrasonography is helpful for a naive operator to perform high-quality thyroid ultrasound examinations

Xiao-Long Li,Yi-Kang Sun,Qiao Wang,Zi-Tong Chen,Zhe-Bin Qian,Le-Hang Guo,Hui-Xiong Xu 대한초음파의학회 2022 ULTRASONOGRAPHY Vol.41 No.4

Purpose: This study investigated the value of synchronous tele-ultrasonography (TUS) for naive operators in thyroid ultrasonography (US) examinations.Methods: Ninety-seven patients were included in this prospective, parallel-controlled trial. Thyroid scanning and diagnosis were completed by resident A independently, resident B with guidance from a US expert through synchronous TUS, and an on-site US expert. The on-site expert’s findings constituted the reference standard. Two other off-site US experts analyzed all data in a blind manner. Inter-operator consistency between the two residents and the on-site US expert for thyroid size measurements, nodule measurements, nodule features, American College of Radiology (ACR) Thyroid Imaging Reporting and Data System (TI-RADS) categories, and image quality was compared. Two questionnaires were completed to evaluate the clinical benefit.Results: Resident B detected more nodules consistent with the on-site expert than resident A did (89.4% vs. 56.5%, P<0.001). Resident B achieved excellent consistency with the on-site expert in terms of ACR TI-RADS categories, nodule composition, shape, echogenic foci, and vascularity (all intra-class correlation coefficients [ICCs] >0.75), while resident A achieved lower consistency in ACR TI-RADS categories, composition, echogenicity, margin, echogenic foci, and vascularity (all ICCs 0.40-0.75). Residents A and B had excellent consistency in target nodule measurements (all ICCs >0.75). Resident B achieved better performance than resident A for gray values, time gain compensation, depth, color Doppler adjustment, and the visibility of key information (all P<0.05). Furthermore, 61.9% (60/97) of patients accepted synchronous TUS, and 59.8% (58/97) patients were willing to pay for it.Conclusion: Synchronous TUS can help inexperienced residents achieve comparable thyroid diagnostic capability to a US expert.

Improving the quality of breast ultrasound examination performed by inexperienced ultrasound doctors with synchronous tele-ultrasound: a prospective, parallel controlled trial

Yi-Kang Sun,Xiao-Long Li,Qiao Wang,Bo-Yang Zhou,An-Qi Zhu,Chuan Qin,Le-Hang Guo,Hui-Xiong Xu 대한초음파의학회 2022 ULTRASONOGRAPHY Vol.41 No.2

Purpose: This prospective study explored the value of synchronous tele-ultrasound (US) to aid doctors inexperienced in US with breast US examinations.Methods: In total, 99 patients were enrolled. Two trainee doctors who were inexperienced in US (trainee A [TA] and trainee B [TB]) and one doctor who was an expert in US completed the US examinations sequentially. TA completed the US examinations independently, while TB was instructed by the expert using synchronous tele-US. Subsequently, the expert performed on-site US examinations in person. Separately, they selected the most clinically significant nodule as the target nodule. Consistency with the expert and image quality were compared between TA and TB to evaluate tele-US. Furthermore, TB and the patients evaluated tele-US through questionnaires.Results: TB demonstrated higher consistency with the expert in terms of target nodule selection than TA (93.3% vs. 63.3%, P<0.001). TB achieved good inter-observer agreement (ICC, >0.75) with the expert on five US features (5/9, 55.6%), while TA only did so for one (1/9, 11.1%) (P=0.046). TB’s image quality was higher than TA’s in gray value, time gain compensation, depth, color Doppler adjustment, and the visibility of key information (P=0.018, P<0.001, P<0.001, P=0.033, and P=0.006, respectively). The comprehensive assessment score was higher for TB than for TA (3.96±0.82 vs. 3.09±0.87, P<0.001). Tele-US was helpful in 69.7% of US examinations and had a training effect in 68.0%. Furthermore, 63.6% of patients accepted tele-US and 60.6% were willing to pay.Conclusion: Tele-US can help doctors inexperienced in US to perform breast US examinations.

Identification and evolutionary history of the DD41D transposons in insects

Xiao-Gu Zhang,Hua-Hao Zhang,Yi-Hong Shen,Xiao-Min Xiong,Min-Jin Han 한국유전학회 2016 Genes & Genomics Vol.38 No.2

The rosa monophyletic group of transposons is a group of transposable element with characteristics of encoding a DD41D motif in the catalytic domain. However, biology and evolutionary history of this monophyletic group are still poorly understood. In this study, we report the first description for the presence of a rosa transposon in the silkworm Bombyx mori. Further analyses confirmed that this element in the silkworm genome had recently amplified and might still be capable of transposition. In addition, we present evidence, based on searches of publicly available insect genomes, that a new clade of the rosa monophyletic group was identified. Interestingly, analysis of their three dimensional structures suggested that these proteins showed highly similar protein structures with that of the Mos1 transposase. These results provided useful insights into the functionality of these transposases and their structural and functional deviations from other transposases in the Tc1/mariner superfamily. Meanwhile, sequence and phylogenetic analysis confirmed that DD41D and maT elements might represent another independent large group of the Tc1/mariner superfamily. Importantly, the result of the comparison of terminal inverted repeats (TIRs) validated that DD41D and maT elements almost had identical consensus terminal sequences (50-CAGGGTGNS NCA-30), implying they might have similar cleavage sites or patterns during the process of their transposition. In a word, this study will enrich and expand our knowledge of the Tc1/mariner superfamily.

Meromorphic Functions Sharing a Nonzero Value with their Derivatives

Li, Xiao-Min,Ullah, Rahman,Piao, Da-Xiong,Yi, Hong-Xun Department of Mathematics 2015 Kyungpook mathematical journal Vol.55 No.1

Let f be a transcendental meromorphic function of finite order in the plane such that $f^{(m)}$ has finitely many zeros for some positive integer $m{\geq}2$. Suppose that $f^{(k)}$ and f share a CM, where $k{\geq}1$ is a positive integer, $a{\neq}0$ is a finite complex value. Then f is an entire function such that $f^{(k)}-a=c(f-a)$, where $c{\neq}0$ is a nonzero constant. The results in this paper are concerning a conjecture of Bruck [5]. An example is provided to show that the results in this paper, in a sense, are the best possible.

Study of the sympathetic detonation reaction behavior of a fuze explosive train under the impact of blast fragments

Youcai Xiao,Xiangdong Xiao,Chenyang Fan,Yanyi Xiong,Zhijun Wang,Yi Sun 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.6

Insensitive munitions (IM) assessments are required to carry out the sympathetic detonation (SD) experiments. The impact of blast fragments or strong shock waves is the cause of sympathetic detonation. In this paper, a numerical simulation method is developed to predict the sympathetic detonation behavior of fuze explosive trains under the impact of blast fragments, which includes the ignition and growth (I&G) model, the JonesWilkins-Lee (JWL) equations of state, and a constitutive relationship. The experimental and numerical results were compared and analyzed, and the validity of the numerical simulation method was proven. The sympathetic detonation behavior of a fuze was studied for a single donor and multiple acceptors. The critical distance was obtained with the presence of fragments using numerical simulation. A critical distance model was developed, which provides a theoretical model for relating the detonation sequence and the placement distance of the fuze explosive train. The simulated results agreed with the theoretical calculations, and thus the model can provide the support for sympathetic detonation experiments.

Exploitation of IP-based Intelligent Networked Measuring and Control Device and System

LIU Gui-xiong,LUO Yi,FANG Xiao-dong 제어로봇시스템학회 2003 제어로봇시스템학회 국제학술대회 논문집 Vol.2003 No.10