Hydrogen sulfide restores cardioprotective effects of remote ischemic preconditioning in aged rats via HIF-1α/Nrf2 signaling pathway

Wang, Haixia,Shi, Xin,Cheng, Longlong,Han, Jie,Mu, Jianjun The Korean Society of Pharmacology 2021 The Korean Journal of Physiology & Pharmacology Vol.25 No.3

The present study explored the therapeutic potential of hydrogen sulfide (H2S) in restoring aging-induced loss of cardioprotective effect of remote ischemic preconditioning (RIPC) along with the involvement of signaling pathways. The left hind limb was subjected to four short cycles of ischemia and reperfusion (IR) in young and aged male rats to induce RIPC. The hearts were subjected to IR injury on the Langendorff apparatus after 24 h of RIPC. The measurement of lactate dehydrogenase, creatine kinase and cardiac troponin served to assess the myocardial injury. The levels of H2S, cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE), nuclear factor erythroid 2-related factor 2 (Nrf2), and hypoxia-inducible factor (HIF-1α) were also measured. There was a decrease in cardioprotection in RIPC-subjected old rats in comparison to young rats along with a reduction in the myocardial levels of H2S, CBS, CSE, HIF-1α, and nuclear: cytoplasmic Nrf2 ratio. Supplementation with sodium hydrogen sulfide (NaHS, an H2S donor) and l-cysteine (H2S precursor) restored the cardioprotective actions of RIPC in old hearts. It increased the levels of H2S, HIF-1α, and Nrf2 ratio without affecting CBS and CSE. YC-1 (HIF-1α antagonist) abolished the effects of NaHS and l-cysteine in RIPC-subjected old rats by decreasing the Nrf2 ratio and HIF-1α levels, without altering H2S. The late phase of cardioprotection of RIPC involves an increase in the activity of H2S biosynthetic enzymes, which increases the levels of H2S to upregulate HIF-1α and Nrf2. H2S has the potential to restore aging-induced loss of cardioprotective effects of RIPC by upregulating HIF-1α/Nrf2 signaling.

Investigating Trends in Research on China’s Sport Policy Using Social Network Analysis and Topic Modeling

Yongdi Wang,김경식,Haixia Yue,Zhentao Liu,Sihong Sui,Wang Mingyi 아시아스포츠융합과학회 2023 Asia Pacific Journal of Applied Sport Sciences Vol.4 No.1

PURPOSE The purpose of the current study was to examine the research trend on China’s sport policy. We proposed three research questions: (a) have the research keywords for China’s sport policy changed over time; (b) which research keywords best represent the past 30 years of research on China’s sport policy; and (c) what are the primary topics of that research? METHOD We searched the core journals on CNKI to determine trends in 30 years of research on China’s sport policy and directions for future research. In order to achieve this goal, we conducted social network analysis using 437 articles published between 1993 and 2020. RESULT First, we found that China’s sport policy-related keywords did not change significantly. Second, the primary keywords over this 30-year period included the following: sport, policy, China, development, system, implementation, innovation, and industry. Third, sport policy scholars focused most often on the sport industry, followed by sport policy development, school sports, sport governance, and mass sports. CONCLUSION To develop sport policy research in China further, private academic organizations (e.g., China’s Society for Sport Policy) need to conduct sport policy studies.

The Genus Letrouitia (Letrouitiaceae: Lichenized Ascomycota) New to Cambodia

Shi, Haixia,Qian, Zigang,Wang, Xinyu,Liu, Dong,Zhang, Yanyun,Ye, Xin,Harada, Hiroshi,Wang, Lisong The Korean Society of Mycology 2015 Mycobiology Vol.43 No.2

The genus Letrouitia is newly recorded for Cambodia, including the four species as L. domingensis, L. leprolytoides, L. sayeri, and L. subvulpina. A brief description and illustrations are provided.

Optimal Control and Stabilization for Networked Control Systems Subject to Intermittent Observations and One-step Delayed Measurement

Na Wang,Chuanzhi Lv,Xiao Liang,Haixia Wang,Xiao Lu 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.4

This paper concerns the control problem for networked control systems (NCSs) with local and remote controllers (LRC) subject to one-step delay and intermittent observations. The main contributions lie in two aspects. Firstly, for the finite-horizon case, applying the maximum principle and the completing square, a necessary and sufficient condition is derived for the solvability of the optimal control problem. Meanwhile, we obtain the explicit controller which is a linear function of the optimal state estimator, with the feedback gain based on the coupled Riccati equations. Secondly, for the infinite-horizon case, a necessary and sufficient condition of the stabilization in the mean square sense for the system without additive noise is derived and a sufficient condition is developed for the boundedness in the mean square sense of the system with the additive noise. Numerical examples are given to show that the proposed algorithms are valid.

Investigating Research Trend of Chinese Wushu: Application of Social Netword Analysis

( Yongdi Wang ),( Kyung Kim ),( Sihong Sui ),( Haixia Yue ) 한국융합과학회 2022 한국융합과학회 국제학술대회자료집 Vol.2022 No.0

Since the founding of the People's Republic of China more than 70 years ago, Wushu, as an organic component of Chinese sports, culture, education and health undertakings, has continuously improved its scientific, in-depth and systematic level of research. It can be divided into the following stages: from the founding of the People's Republic of China to the early stage of the reform and opening up, the learning, training and competition of Wushu produced research results, and scientific research awareness was generally formed; From the reform and opening up to the mid-1990s, the research on Wushu teaching and training continued to deepen, and the research on history, culture and education rose; From the end of the 1990s to the Beijing Olympic Games, the research on the basic theory of Wushu was fruitful, and the dissemination and development became the focus theme; From the Beijing Olympic Games to the new era, Wushu research is more integrated into the national strategy, and the academic system structure is gradually improved (Guo et al., 2021). Key words Network analysis method is a very useful method to study the knowledge structure and research trends of specific topics (Kim et al., 2020; Zhang & Kim, 2021).First, the co word analysis was conducted to identify trends in leisure studies Second, a centrality analysis was performed to identify keywords with influence within quantified abstract data, a cohesive group analysis to identify detailed research areas within the network (Kim, 2018). This research aims to explore the research trend of Chinese Wushu through keyword network analysis. The purpose of this study is to identify research trends by analyzing the frequency of simultaneous occurrence of keywords and identifying keyword networks. To this end, it has established the following two research questions. First of all, as time goes by, what changes have taken place in the research trend of Chinese Wushu? Second, what is the relationship between keywords in Wushu research? Method In order to study the knowledge structure and development trend of Chinese Wushu, we collected 10 core journals from 19 core academic journals on CNKI. Through the analysis and collation of the data, this study divides the data into four periods: the 1990s, the 2000s, the 2010s and the 2020. Through CNKI retrieval of key words related to Wushu, 2891 core journals were finally selected to form bibliographic information for network analysis. Bibliographic information includes author, paper title, journal name, abstract, key words, publication year, etc. Through the analysis and collation of data, this study selected 10 Chinese core journals, a total of 2225 core journals. Findings and Discussions Among them, Chinese Wushu were most published in sports culture guides, reaching 442 articles (19.87%); There are 341 journals of Wuhan Institute of Physical Education (15.33%), 270 journals of Beijing Institute of Physical Education (12.12%), 228 journals of Chengdu Institute of Physical Education (10.25%), etc. The history of martial arts and the training of martial arts athletes show the phenomenon of chain fracture. The culture, movement and education of martial arts have been developing since 1992. Since 2000, the research on martial arts has increased significantly, with the largest increase in the research on martial arts culture; Secondly, the research on martial arts from 2000s-2010s is booming, but the development of martial arts will decline after 2020s. In the next 10 years, there will be a trend of unstable development, which may lead to less and less research on martial arts, and thus become an unexpected topic. The historical stability of martial arts is good, the degree of concern is low, and there may be a slight upward trend; The development of martial arts culture and martial arts education shows a downward trend; The movement of martial arts is on the rise. The central analysis shows that the key words such as martial arts culture and martial arts education are the core content of martial arts research and have high influence.

Morphology and distribution of antennal, maxillary palp and labial palp sensilla of the adult bruchid beetles, Callosobruchus chinensis (L.) (Coleoptera: Bruchidae)

Hongmin WANG,Haixia ZHENG,Yaowen ZHANG,Xianhong ZHANG 한국곤충학회 2018 Entomological Research Vol.48 No.6

Callosobruchus chinensis (Coleoptera: Bruchidae) is the main pest of mungbean (Vigna radiata) especially during seed storage. To provide background information for chemical ecology studies, we examined the externalmorphology of the antennal, maxillary palp and labial palp sensilla of this insect with scanning electron microscopy. The antennae of adult C. chinensis exhibited sexual dimorphism. The female have serrated antenna and the male have pectinate morphology. Eight sensillum types have been observed on the antennae of both sexes: Böhm bristles, sensilla chaetica, sensilla trichodea, sensilla basiconica, sensilla styloconicum, sensilla coeloconica, sensillum campaniformia, sensilla cavity. There are no differences on the morphology of maxillary palp and labial palp between female and male. Four different types of sensilla are present on the labial and maxillary palps of both sexes of C. chinensis: sensilla chaetica, sensilla twig basiconica, sensilla basiconica, sensilla digitiformia.

A Research of Sensors Complementary for the RFID Wireless Network Based on the Variable Coverage Radius

Hongzhi Wang,Yang Zhao,Haixia Zhou 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12

In order to solve the problems of sensors complementary, algorithm sensors complementary for the RFID wireless network is proposed in this paper. Based upon the fundamental definitions about the probabilistic events and the data generated by the particle filtering algorithm, the paper considers the factors of the number of locations covered and the probability the object appears. In view of the definition of the covering variability and the cover ratio, 5kinds of RFID sensors covering radius are considered. Finally, the experiment is carried out in order to improve the algorithm’s availability and effectiveness.

The influence of high-temperature nitridation process on the crystalline quality of semipolar (1122) GaN epitaxial films

Li Wenlong,Wang Lianshan,Chai Ruohao,Wen Ling,Lu Haixia,Wang Huanhua,Yang Shaoyan,Sun Wenhong 한국물리학회 2022 Current Applied Physics Vol.39 No.-

Semipolar (1122) GaN epitaxial films were grown on m-plane sapphire substrates by metal-organic chemical vapor deposition and additional high-temperature nitridation was introduced during the growth. The growth mechanism, surface microtopography, and the full width at half maximum (FWHM) of X-ray rocking curves (XRCs) of on-axis and off-axis (1122) GaN planes were investigated. The results demonstrate that additional high-temperature nitridation process could reduce surface roughness and anisotropy, and suppress the other orientations, and partially improve the crystalline quality of (1122) GaN epitaxial films. The XRCs FWHM of the off-axis (1122) GaN planes decrease and show a different varying tendency after additional high-temperature nitridation process associated with the partial dislocations and basal plane stacking faults (BSFs). The results of the modified Williamson-Hall (W–H) analysis and photoluminescence spectrum show the BSFs increased while the partial dislocations decreased after an additional high-temperature nitridation process. The improvement of crystalline quality was mainly correlated to the reduction of partial dislocations.

Multi-objective optimization of a co-rotating twin-screw gear transmission system based on heuristic search

Mingzhu Hu,Haixia Wang,Peitang Wei,Genshen Liu,Lei Zhang,Zhiqiang He,Hua iju Liu 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.11

The positive characteristics observed in terms of compact structural sizes and high torque-transmitting capacities have allowed co-rotating twin-screw (CRTS) gear transmissions to be extensively applied to instances requiring small central distances and large power densities. In this study, a multi-objective optimization model for the quick determination of structural parameters of the CRTS gear transmission system is proposed based on the heuristic search and non-dominant sorting genetic algorithm. Results reveal that the optimized scheme with 17 design variables and 18 constrained parameters can be achieved with this model. The system reduces mass by 7.74 % from the original mass of 199.06 kg, while the safety factor variance of the transmission system decreases by 29.3 %. This method applies to other transmission systems with different structures and thus provides general theoretical support for modern gear transmission optimizations.

Grading Plant Available Non-Exchangeable Potassium According to its Release Rate Levels Using Sodium Tetraphenylboron

Ting Li,Huoyan Wang,Haixia Sun,Jianmin Zhou 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6