作者机构：
[Chang, CH; Ho, Chia-An; Chang, Chun-Hao; Yeh, Hung-Chih; Chen, Chao-Yuan; Ho, Chin-Shan] Natl Taiwan Sport Univ, Grad Inst Sports Sci, Taoyuan City, Taiwan.;[Li, Fang] Cent China Normal Univ, Sch Phys Educ, Wuhan, Hubei, Peoples R China.;[Chen, Chao-Yuan] Natl Taipei Univ Business, Sport Off, Taipei City, Taiwan.
通讯机构：
[Chang, CH ] N;Natl Taiwan Sport Univ, Grad Inst Sports Sci, Taoyuan City, Taiwan.
关键词：
Mechanical property;Myometer;Rowing;Symmetry index
摘要：
BACKGROUND: The mechanical properties of muscles, such as changes in muscle tone and stiffness, are related to sports performance and injuries. Rowers are at increased risk of muscle fatigue and injury during high-repetition and heavy-load cyclic muscle actions. In view of this, the aim of the present study was to investigate the acute effect on muscle tone and stiffness, as well as bilateral muscle asymmetry, in high school rowers after a 2000-meter rowing ergometer test. METHODS: Twelve young male rowers (age = 17.1 ± 0.9 years, body weight = 73.5 ± 9.7 kg) were included in the study. The data of muscle tone (frequency) and stiffness of the posterior deltoids (PD), latissimus dorsi (LD), and rectus femoris (RF) (dominant and non-dominant side) before and after a 2000-m rowing ergometer test were collected using a handheld MyotonPRO device. RESULTS: After the rowing ergometer test, the muscle tone of dominant side PD, LD, and RF were significantly increased (p < 0.05). On the other hand, the muscle stiffness of the non-dominant side LD and RF, as well as the dominant side PD, LD, and RF were significantly increased after the rowing ergometer test (p < 0.05). The muscle tone and stiffness results showed that the dominant side PD, LD, and RF were all significantly higher than the non-dominant side after the rowing ergometer test (p < 0.05), where bilateral PD and RF exhibits moderate asymmetry (5% < symmetry index < 10%). CONCLUSIONS: After a high-intensity and high-load 2000-m rowing ergometer test, PD, LD, and RF showed increases in muscle tone and stiffness, as well as changes in the symmetry of bilateral muscle mechanical properties.
摘要：
Linear complementary dual (LCD) codes can provide an optimum linear coding solution for the two-user binary adder channel. LCD codes also can be used to against side-channel attacks and fault non-invasive attacks. Let dLCD(n,k) denote the maximum value of d for which a binary [n,k,d] LCD code exists. In \cite{BS21}, Bouyuklieva conjectured that dLCD(n+1,k)=dLCD(n,k) or dLCD(n,k)+1 for any lenth n and dimension k >= 2. In this paper, we first prove Bouyuklieva's conjecture \cite{BS21} by constructing a binary [n,k,d-1] LCD codes from a binary [n+1,k,d] LCDo,e code, when d >= 3 and k >= 2. Then we provide a distance lower bound for binary LCD codes by expanded codes, and use this bound and some methods such as puncturing, shortening, expanding and extension, we construct some new binary LCD codes. Finally, we improve some previously known values of d(LCD)(n,k) of lengths 38 <= n <= 40 and dimensions 9 <= k <= 15. We also obtain some values of d(LCD)(n,k) with 41 <= n <= 50 and 6 <= k <= n-6.
作者机构：
[Lv, Zhiwei] School of Education, Central China Normal University, Wuhan, Hubei, 430079, China;[Lv, Zhiwei] School of Foreign Languages, Shaoxing University, Shaoxing, Zhejiang, 312000, China;[Ying, Changtian] School of Mechanical and Electrical Engineering, Shaoxing University, Shaoxing, Zhejiang, 312000, China;[Chen, Jiayi] Youth League Committee, Shaoxing University, Shaoxing, Zhejiang, 312000, China
摘要：
BACKGROUND: Moral education in colleges and universities is an important part of the talent training system, including moral education curriculum, moral education practice, mental health education. Volunteer service is a public welfare act in which volunteers volunteer their time, knowledge, property, technology, with the ultimate goal of helping others and serving the society without personal compensation. As an innovative form of moral education practice in colleges and universities, college students' voluntary service is of great significance in promoting the reform and innovation of moral education, enhancing the affinity, appeal and influence of moral education, and building a positive psychology for college students. SUBJECTS AND METHODS: As an effective carrier of moral education practice in colleges and universities, voluntary service is helpful to enhance the effectiveness of moral education practice and construct the positive psychology of college students. This project is based on the actual situation of college students participating in volunteer services, and collected the volunteer services of 4545 college students in Zhejiang Province. Through model construction and data modeling, the correlation between college students' participation in volunteer service and their moral education performance and mental health was analyzed, and the basic path and guarantee measures to promote the role of volunteer service in moral education and positive psychological construction were deeply explored. RESULTS: From the correlation analysis of students' voluntary service participation, moral education performance and voluntary service motivation, students' attributes are determined according to their voluntary service participation, so as to predict their moral education performance and mental health level. CONCLUSION: College students' voluntary service is partially positively related to their moral education performance and mental health. In order to improve students' moral education performance and mental health, we can optimize the participation frequency, participation duration, participation ways and type structure of voluntary service, constantly increase the participation frequency of voluntary service, increase the duration of voluntary service, broaden the participation ways of voluntary activities, and enrich the types of voluntary service activities.
通讯机构：
[Gu, WJ ] Y;[Li, GX ] H;Yangtze Univ, Sch Phys & Optoelect Engn, Jingzhou 434023, Peoples R China.;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
We investigate the scattering processes of two photons in a one-dimensional waveguide coupled to two giant atoms. By adjusting the accumulated phase shifts between the coupling points, we are able to effectively manipulate the characteristics of these scattering photons. Utilizing the Lippmann-Schwinger formalism, we derive analytical expressions for the wave functions describing two-photon interaction in separate, braided, and nested configurations. Based on these wave functions, we also obtain analytical expressions for the incoherent power spectra and second-order correlation functions. In contrast to small atoms, the incoherent spectrum, which is defined by the correlation of the bound state, can exhibit more tunability due to the phase shifts. Additionally, the second-order correlation functions in the transmission and reflection fields could be tuned to exhibit either bunching or antibunching upon resonant driving. These unique features offered by the giant atoms in waveguide QED could benefit the generation of nonclassical itinerant photons in quantum networks.
关键词：
Energy splitting of STAR-RIS;time switching of STAR-RIS;UAV-enabled outdoor-to-indoor WPCN;indoor NFZ
摘要：
This letter investigates a Simultaneously Transmitting and Reflecting Reconfigurable Intelligent Surface (STAR-RIS)-assisted unmanned aerial vehicle (UAV)-enabled outdoor-to-indoor (O2I) wireless powered communication network (WPCN), in which the UAV avoids flying over the indoor no-fly zone (NFZ). In the downlink energy transfer (DET) stage, the energy-constrained STAR-RIS and the O2I Internet of Things (IoT) devices harvest energy from the radio frequency (RF) signals of the UAV to self-sustain its operation. In the uplink information transmission (UIT) stage, the IoT devices transmit information to the UAV using the harvested energy, assisted by the STAR-RIS. We introduce the STAR-RIS energy splitting (ES) and time switching (TS) operating protocols in the DET and UIT stages, respectively, to maximize the harvested downlink energy and the achievable uplink sum-rate. Further, an alternating optimization (AO) algorithm based on the penalty method and successive convex approximation (SCA) technology is proposed to solve the resulting highly-coupled non-convex optimization problems, in which the UAV trajectory based on the UAV power consumption model, resource allocation of the O2I IoT devices, and beamforming vectors of the STAR-RIS are jointly optimized. Finally, numerical results demonstrate that our proposed scheme can achieve significant system sum-rate gains that are better than other baseline schemes.
摘要：
Cyberbullying and cyber victimization are widespread problems that impair the physical and mental health of adolescents. To date, the impact of parental phubbing on adolescent cyberbullying and cyber victimization remains underexplored. The current study investigates the relationships between parental phubbing and adolescent cyberbullying and cyber victimization and whether these influence mechanisms work consistently. We recruited 1034 Chinese adolescents aged 12–15 years as a sample and constructed two moderated mediation models to evaluate the relationships among parental phubbing, social anxiety, self-control, cyberbullying, and cyber victimization. The results showed that (1) parental phubbing positively predicted adolescent cyberbullying and cyber victimization; (2) parental phubbing was associated with cyberbullying and cyber victimization among adolescents through the mediating effect of social anxiety; (3) the relationships between parental phubbing and adolescent cyberbullying and cyber victimization and the mediating effects of social anxiety were moderated by self-control; specifically all effects were significant at low self-control and vice versa. The research findings are conducive to informing the risk factors and mechanisms of adolescent cyber violence and further reveal the negative influence of parental phubbing on adolescent development.
摘要：
This paper focuses on the existence of positive solutions for the following weakly coupled Schrödinger system with supercritical growth except at the origin: $ \begin{equation*} \left\{ \begin{array}{ll} -\Delta u_1 = \mu_1|u_{1}|^{p(r) - 2}u_1 + \beta|u_{2}|^{\frac{p(r)}{2}}|u_1|^{\frac{p(r)}{2}-2}u_{1}, & x\in B_1(0), \\ -\Delta u_2 = \mu_2|u_{2}|^{p(r) - 2}u_{2} + \beta|u_{1}|^{\frac{p(r)}{2}}|u_2|^{\frac{p(r)}{2}-2}u_{2}, & x\in B_1(0), \end{array} \right. \end{equation*} $ where $ B_1(0) $ is an unit ball $ {\mathbb{R}^N} $ with $ N\ge 3 $, $ \beta\in\mathbb{R} $ is a coupling constant, $ \mu_1,\mu_2\in {\mathbb R} $ are constants, $ p(r) = 2^* + r^{\alpha} $ with $ 2^* = \frac{2N}{N-2} $. Assuming that $ 0<{\alpha}<\min\{\frac{N}{2},N-2\} $, we apply concentration-compactness idea to show that the problem has a positive solution provided that $ \beta>0 $ if $ N\ge 5 $ and $ \beta\in(0,\beta_0]\cup[\beta_1,+\infty) $ for some positive constants $ \beta_0<\beta_1 $ if $ N = 3,4 $.
作者机构：
[Liu, Sannyuya; Yuan, Xin; Yue, Jieyu; Li, Zhen; Li, Qing; Liu, SNYY; Hu, Tianhui; Chen, Sijing; Sun, Jianwen] Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.;[Liu, Sannyuya; Liu, SNYY] Cent China Normal Univ, Natl Engn Res Ctr E Elearning, Wuhan 430079, Peoples R China.
通讯机构：
[Liu, SNYY ; Chen, SJ] C;Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Natl Engn Res Ctr E Elearning, Wuhan 430079, Peoples R China.
摘要：
The purpose of this study was to investigate the frontier, science, and public engagement of educational science research. This paper conducted a systematic literature review of 101 educational science research articles published in Nature and Science in 1982-2021 based on the Web of Science database and analyzed the current status of research in terms of basic publication characteristics, research themes, and research processes. Five research topics were recognized, namely, education policy evaluation and reform, learning mechanisms and learning interventions, science education, educational technology, and education equity. Content of each topic had a distinctive emphasis. Findings revealed that most studies were dominated by empirical research, involving causal relationships between various educational phenomena, diverse range of research subjects, rigorous scientific randomized experiments, and quantitative analysis. We encourage more research on educational science in the future from four feasible directions, namely, developing active learning approaches to promoting effective learning, extending the research subjects and objectives of science education, conducting long-term, large-scale and practice-oriented research, and introducing new research methods into educational research.
期刊：
Energy Research & Social Science,2024年111 ISSN：2214-6296
通讯作者：
Wang, Jiayu;Liu, JY
作者机构：
[Wang, Jiayu; Liu, Jinyan] Cent China Normal Univ, Sch Foreign Languages, Wuhan, Peoples R China.
通讯机构：
[Wang, JY; Liu, JY ] C;Cent China Normal Univ, Sch Foreign Languages, Wuhan, Peoples R China.
关键词：
Climate change;Sustainability reports;Ecolinguistics;Multimodal critical discourse analysis;Corporate visual communication;Energy industry
摘要：
Visuals in environmental communication can potentially shape the public perception of environmental issues. They are frequently used in corporate communication in sustainability reports to construct environmentally responsible corporate images. This study analyzes the images used in the sections addressing climate change in the sustainability reports of an international petroleum mega-business from 2018 to 2022. Based on the theoretical framework of ecolinguistics and multimodal critical discourse analysis, the present study investigates how the motifs constructed in the reports' visual narratives legitimize the energy industry with various discursive strategies in relation to the underlying anthropocentric ecosophy. Four main motifs in the visual narratives are identified, including uniformed employees, the high-tech (clear) energy industry, unspoiled nature, and public signage with evaluative meanings. These motifs are represented through the discursive strategies of salience, erasure, and evaluation, which are operationalized through the praxis of collectivization, individualization, decontextualization, and aestheticization. The real causes and impacts of climate change are discursively erased, and the energy-exploiting and environmentally polluting industry is techno-optimistically aestheticized and romanticized in tackling climate change and actively contributing to idyllic and unspoiled nature. The present research is hoped to shed light on the analyses of corporate environmental communication in the current era where ecology is increasingly valued, and it may also help raise viewers' critical awareness of institutional ecological discourses.
作者机构：
[Guan, Rui; Sun, Yao; Li, Junrong; Liu, Guorong] Cent China Normal Univ, Coll Chem, Int Joint Res Ctr Intelligent Biosensor Technol &, Natl Key Lab Green Pesticide, Wuhan 430079, Peoples R China.;[Yan, Mingzhe] Huazhong Univ Sci & Technol, Wuhan Jinyintan Hosp, Tongji Med Coll, Wuhan 430023, Peoples R China.;[Cheng, Jing] Wuhan Univ Sci & Technol, Sch Publ Hlth, Wuhan 430072, Peoples R China.;[Zhan, Jianbo] Hubei Prov Ctr Dis Control & Prevent, Inst Hlth Inspect & Testing, Wuhan 430072, Peoples R China.;[Wuethrich, Alain; Trau, Matt; Wuethrich, A] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Ctr Personalized Nanomed, Brisbane, Qld 4072, Australia.
通讯机构：
[Wuethrich, A ] U;[Sun, Y ] C;Cent China Normal Univ, Coll Chem, Int Joint Res Ctr Intelligent Biosensor Technol &, Natl Key Lab Green Pesticide, Wuhan 430079, Peoples R China.;Univ Queensland, Australian Inst Bioengn & Nanotechnol, Ctr Personalized Nanomed, Brisbane, Qld 4072, Australia.
摘要：
The molecular detection of multiple respiratory viruses provides evidence for the rational use of drugs and effective health management. Herein, we developed and tested the clinical performance of an electrohydrodynamic-driven nanobox-on-mirror platform (E-NoM) for the parallel, accurate, and sensitive detection of four respiratory viral antigens. The E-NoM platform uses gold-silver alloy nanoboxes as the core material with the deposition of a silver layer as a shell on the core surfaces to amplify and enable a reproducible Raman signal readout that facilitates accurate detection. Additionally, the E-NoM platform employs gold microelectrode arrays as the mirror with electrohydrodynamics to manipulate the fluid flow and enhance molecular interactions for an improved biosensing response. The presence of viral antigens binds the nanobox-based core-shell nanostructure on the gold microelectrode and creates the nanocavity with extremely strong "hot spots" to benefit sensitive analysis. Significantly, in a large clinical cohort with 227 patients, the designed E-NoM platform demonstrates the capability of screening respiratory infection with achieved clinical specificity, sensitivity, and accuracy of 100.0, 96.48, and 96.91%, respectively. It is anticipated that the E-NoM platform can find a position in clinical usage for respiratory disease diagnosis.
作者机构：
[Yin, Ya; Chen, Zhao; Deng, Dian-Dian] Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, People's Republic of China;[Guan, Qichen] State Key Laboratory of Separation Membrane and Membrane Process, School of Chemistry, Tiangong University, Tianjin 300387, People's Republic of China;[Liu, Sheng Hua; Liu, Shanting] Xi'an Key Laboratory of Functional Organic Porous Materials, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China;[Sun, Yue] National Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
摘要：
Achieving high-contrast tricolor emissive regulation of a single-component molecule using a single type of external stimulus is highly desirable but challenging. In the present study, we report a symmetric acceptor-donor-acceptor (A-D-A)-type aggregation-induced emission-active luminogen, which displays a sequential high-contrast fluorescence switching just by anisotropic mechanical grinding. Specifically, upon light grinding, an orange-yellow-to-blue hypsochromic mechanofluorochromic response with a distinct color contrast (change in the maximum emission wavelength, Δλ(em,max) = 122 nm) is noticed, and the slightly ground solid exhibits a blue-to-red high-contrast (Δλ(em,max) = 185 nm) bathochromic mechanofluorochromic conversion upon vigorous grinding. Thus, using a single luminogen developed here, we can realize wide-range (Δλ(em,max) > 100 nm) hypso- and bathochromic fluorescence mechanochromisms simultaneously. The tricolored mechanofluorochromic phenomenon is attributed to two different morphological transitions involving crystalline-to-crystalline and crystalline-to-amorphous states. Furthermore, three information anticounterfeiting systems are developed using the luminogen presented here.
作者机构：
[Huang, Jing] Guangzhou Univ, Sch Math & Informat Sci, Guangzhou, Peoples R China.;[Geng, Xianya] Anhui Univ Sci & Technol, Sch Math & Big Data, Huainan, Peoples R China.;[Zhou, Zihan] Cent China Normal Univ, Fac Math & Stat, Wuhan, Peoples R China.;[Zhou, Zihan] Cent China Normal Univ, Key Lab Nonlinear Anal & Applicat, Minist Educ, Wuhan, Peoples R China.
通讯机构：
[Zhou, ZH ] C;Cent China Normal Univ, Fac Math & Stat, Wuhan, Peoples R China.;Cent China Normal Univ, Key Lab Nonlinear Anal & Applicat, Minist Educ, Wuhan, Peoples R China.
摘要：
Identifying the graph with maximum or minimum spectral radius among a given class of graphs is a central problem in extremal spectral graph theory, known as the Brualdi- Solheid problem. For a graph G = (V-G, E-G), a subset S subset of V-G is called a maximum dissociation set if the induced subgraph G[S] does not contain P-3 as its subgraph, and the subset has maximum cardinality. The dissociation number of G is the number of vertices in a maximum dissociation set of G. In this paper, we first characterize all the connected graphs (resp. bipartite graphs, trees) having maximum spectral radius among connected graphs (resp. bipartite graphs, trees) with given order and dissociation number. Secondly, we show that the connected n-vertex graph with dissociation number phi having minimum spectral radius is a tree, where phi >= [2/3n] . Finally, we determine the graphs having minimum spectral radius with fixed order n and dissociation number phi is an element of {2, [2n/3], n - 1, n - 2}.(c) 2023 Elsevier B.V. All rights reserved.
