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Objective. This study focused on mood regulations and their association with sociodemographic status, exercise pattern, and physical conditions of adults and older adults in China who did not undergo interventions. Method. Data were based on the 2016 to 2018 Guangdong National Physique Monitoring data, in which 5242 participants aged 20-69 years were recruited. Multiple statistical analysis methods, such as descriptive and logistic regression analyses, were used to study each exercise motivation and its association with influencing factors, including sociodemographic characteristics, exercise measurements, and physical conditions. An exercise index for mental health was also used to investigate the number and types of people who were more likely to meet the index. Results. We observed that 44.9% (2355/5242) of participants did not engage in physical exercise in this study. Only older participants (40 to 69 years old) and those with an average level of education (high school/technical secondary school) showed a significant association with exercising for mood regulation. Few people met the index that is good for mental health (16.64% [872/5242] met index 1, and 2.84% (149/5242) met index 2), and higher education showed a significant association with a reduction in the mental health burden and the prevention of depression. Conclusion. This study found that motivating people to be more active and educating them on the potential mental health benefits of exercise could help them to exercise more. [ABSTRACT FROM AUTHOR]

In order to improve the detection function of wearable intelligent devices in the Internet of things and facilitate people to control a variety of information such as heart rate, exercise state, blood oxygen saturation, and so on, the scientific detection of human physical health based on wearable devices based on Internet of things technology is proposed. Through the combination of software- and hardware-related functional modules, the real-time detection of human physical health information can be effectively realized. Firstly, the detection principle of optical capacitance product pulse wave signal and the waveform characteristics of pulse wave are introduced, and then the application scenarios and advantages of wearable devices are further introduced; then, the convolutional neural network for pulse wave signal denoising and the basic principle of self-encoder are introduced; finally, the regression prediction method and support vector machine method for pulse wave signal feature extraction are introduced in detail. The pulse wave based on optical capacitance product is removed to improve the waveform quality of pulse wave signal. Firstly, the system software development environment is briefly described. Then, the software design of watch terminal master device based on MSP432 and belt terminal slave device based on MSP430 are described in detail, and the detailed program implementation flow of each key technology in the system is given. In addition, the fall detection algorithm based on threshold discrimination is studied, and the program implementation of the algorithm is also described in detail. Finally, the system is tested. The results show that normal state mainly include normal walking, jogging, and fast sitting, and the accuracy rate is 97%, 95%, and 93%, respectively. For fall state, the experimenter needs to simulate various possible fall states, and the accuracy rate is 95%, 93%, and 95%, respectively, which verifies the detection accuracy of the algorithm. The system can automatically turn on the satellite positioning function when the user's physical sign parameters are abnormal or the user's current fall dangerous situation occurs, and send the current position information and alarm content information through the GSM module, so that the dangerous situation can be found and handled at the first time. [ABSTRACT FROM AUTHOR]

The two-dimensional graphical nesting problem is widespread in industrial production and is an NP-complete problem. The core technology of various nesting methods is the graphical collision algorithm. In this paper, a general algorithm for geometric graphics is proposed. According to the geometrical characteristics of the packed parts, the idea of divide and conquer is adopted, and the corresponding collision strategies are designed, respectively. Two-point bidirectional collision calculation, aligned bidirectional collision and slipping calculation are proposed to determine the collision relationship between graphics. The interpolation strategy is used to reduce the computation of NFP (No-Fit-Polygon). The precise interpolation between graphics is achieved by first marking and positioning, and then sliding interpolation in both directions, which improves the interpolation efficiency. Finally, the results of the comparison test by several cases of different types show that the algorithm is effective, stable, reliable and adaptable. [ABSTRACT FROM AUTHOR]

In the grasping process of the robot, the pose of robot should adapt to the change of the object's pose. In order to avoid the cumbersome calibration and difficulty of inversion in the existing vision-based robotic arm-grasping methods, a robotic arm grasping and tracking method based on Gaussian mixture of machine vision model (MGV) are proposed. This method uses Gaussian mixture model of machine vision to build the mapping relationship between the observed variables of the object and the robot joint variables. In the learning phase, the Gaussian mixture model of machine vision is used to directly construct the mapping from the pose of the target object to the joint angle of the manipulator. In the grasping stage, the pose of the target object is acquired through the camera, and the generation probability of the pose under each Gaussian component is calculated, respectively, and the Gaussian process regression corresponding to the Gaussian component with the largest posterior probability is selected to calculate the corresponding manipulator joint angle. The experimental results show that using Gaussian mixture machine vision model can make the robot manipulator grasp and track better than using single Gaussian process model. [ABSTRACT FROM AUTHOR]

This paper provides an in-depth study and analysis of robot vision features for predictive control and a global calibration of their feature completeness. The acquisition and use of the complete macrofeature set are studied in the context of a robot task by defining the complete macrofeature set at the level of the overall purpose and constraints of the robot vision servo task. The visual feature set that can fully characterize the macropurpose and constraints of a vision servo task is defined as the complete macrofeature set. Due to the complexity of the task, a part of the features of the complete macrofeature set is obtained directly from the image, and another part of the features is obtained from the image by inference. The task is guaranteed to be completely based on a robust calibration-free visual serving strategy based on interference observer that is proposed to complete the visual serving task with high performance. To address the problems of singular values, local minima, and insufficient robustness in the traditional scale-free vision servo algorithm, a new scale-free vision servo method is proposed to construct a dual closed-loop vision servo structure based on interference observer, which ensures the closed-loop stability of the system through the Q-filter-based interference observer, while estimating and eliminating the interference consisting of hand-eye mapping model uncertainty and controlled robot input interference. The equivalent interference consisting of hand-eye mapping model uncertainty, controlled robot input interference, and detection noise is estimated and eliminated to obtain an inner-loop structure that presents a nominal model externally, and then an outer-loop controller is designed according to the nominal model to achieve the best performance of the system dynamic performance and robustness to optimally perform the vision servo task. [ABSTRACT FROM AUTHOR]

The packing for two-dimensional irregular graphics is one of the NP-complete problems and widely used in industrial applications. In this paper, a descending nesting algorithm for a two-dimensional irregular graph based on geometric feature points is proposed. Before the packing, the parts to be packed are sorted, matched, and spliced, and the matching of the rectangular pieces and the rectangular-like pieces is carried out according to the plate size. On this basis, the geometric feature points of the parts are used to construct the packing baseline, and the packing is accurately carried out according to the principles of the bottom left, the principle of the lowest center of gravity, and combination with virtual moving, rotating collision calculation. The computation of the moving collision distance between the graphics is replaced by the projecting computation of the geometric feature points of the graphic parts, so the computation amount can be reduced. Also, this method is used to test a number of benchmarks examples which are provided by ESICUP (EURO Special Interest Group on Cutting and Packing), which show that the proposed algorithm not only can improve packing but also has better stability and reliability. [ABSTRACT FROM AUTHOR]

Carbonate is recently studied as anode material for lithium ion battery due to its relatively high capacity compared to relative oxides. In order to improve the time-efficiency of synthesis, an ultrafast solvothermal process assisted with microwave is carried out to obtain well-constructed Mn 0.8 Co 0.2 CO 3 /graphene composite as anode material for lithium ion batteries. The as-prepared Mn 0.8 Co 0.2 CO 3 /graphene composite with a graphene amount of 17.5 wt% exhibits a morphology of cubic particles in graphene without any impurity. Mn 0.8 Co 0.2 CO 3 /graphene delivers high initial charge capacities of 1033 mAh g −1 . And after 120 cycles, charge/discharge capacities of 737/735 mAh g −1 are maintained at 0.2 A g −1 . Even at 2 A g −1 , the composite can still deliver high charge/discharge capacities of 500/501 mAh g −1 . It is promising to obtain carbonate/graphene anode materials rapidly through such ultrafast solvothermal process assisted by microwave for application. [ABSTRACT FROM AUTHOR]

There have been ongoing discussions about the most recent curriculum reform in China. The new curriculum aims at a more quality-oriented (suzhi) education and producing more well-rounded citizens to meet the challenges of global competition. However, it is questioned how suzhi education is possible with entrance examination still being the sole sorting mechanism. A semester-long ethnography in a rural middle school in northwest China reveals how rural students face many challenges with the new curriculum. Based on interviews, analyses of textbooks, and observations of classroom teaching, the study examines how rural students question the relevance of their curriculum and further the meaning of formal schooling. In addition to the dichotomy between an exam-oriented and quality-oriented curriculum, students are also troubled by the dichotomy between general/academic education and relevant/practical education. The study raises concerns about the urban-centered curriculum and how the rural community's absence in the picture has led to rural students' increasing disengagement in schooling and even dropout. It also reveals how the substance of suzhi education and the new curriculum have further reduced rural students' chance to move upward socially. The article concludes by pushing for discussions on how formal schooling can better serve rural children and youth. [ABSTRACT FROM AUTHOR]

Based on an ethnographic study in a rural middle school in Northwest China, the author explores how the transition of the rural countryside, specifically townization, has challenged the urban–rural dichotomy being reproduced in and by formal schooling. Rural students express criticism of the chaos, pollution, and corruption they have experienced during townization, which also penetrate the school walls and become part of their daily schooling experience. Students’ resistance to townization corresponds to their resistance to schooling. The author analyzes three groups of rural youth (conformists, reformers, and rebels), and how their resistance is limiting and even self-defeating, yet also has potential for being liberating. [ABSTRACT FROM PUBLISHER]

Focuses on the globalization and localization of higher education in China. Background on interrelated trends in Chinese higher education, as of January 2005; Number of students studying in post-secondary schools in China in 2004; Role of the Chinese state in the decentralization of higher education.

Based on the analysis of the advantages and disadvantages of existing surface flattening algorithms, this paper proposes a free‐form surface flattening algorithm that minimizes geometric deformation by combining the advantages of the geometric flattening method and the mechanical energy flattening method to address the problems of many iterations, large changes in convergence, and weak visualization of deformation. The point cloud surface is meshed using the triangular slice search method, and the 3D surface mesh is wrapped around the surface using geometric mapping relationships. The initial correction and deformation analysis of the ring flatten graphic are carried out according to the average flattening error, and a global geometric deformation energy model is established to obtain the energy‐minimizing unfolding conditions and optimize the initial flattening graph by iterative optimization. The verification of the algorithm shows that the algorithm is general, has good robustness, high flattening accuracy, and visualizes the flattening deformation. The method is suitable for some design occasions of machining, such as the flattening calculation of automobile outer cladding parts and sheet metal parts. It is especially suitable for the flattening calculation of ring‐like parts, and is a good guide for the design calculation and stamping process of sheet‐metal‐like parts. [ABSTRACT FROM AUTHOR]

The cell division cycle of T. gondii is driven by cyclically expressed ApiAP2 transcription factors (AP2s) that promote gene sets (regulons) associated with specific biological functions. AP2s drive other AP2s, thereby propelling the progressive gene expression waves defining the lytic cycle. AP2s can act as dimers by themselves, in combination with other AP2s (constitutive or cyclical) or in complexes with epigenetic factors. Exit from the cell cycle into either the extracellular state or differentiation into bradyzoites results in major changes in gene expression. Surprisingly, both transitions lead to expression of a shared set of unique AP2s that suggest a shared stress response that, governed by the specific conditions, leads to different outcomes. • AP2 factors are the major gene expression drivers of the T. gondii cell cycle. • AP2 factors can act as activators or repressors in complex with other players. • A distinct, shared set of AP2 is associated with various exogenous stresses. • New tools now permit comprehensive dissection of the AP2-driven programs. [ABSTRACT FROM AUTHOR]

Background: Psychological birth trauma exhibits a high incidence worldwide, resulting in a wide range of negative impacts on mothers, infants, couples, families and society at large through the maternal-centered ripple effect. However, there is currently limited research on psychological birth trauma in China. Social support and pregnancy stress are important influencing factors of psychological birth trauma. Consequently, this study aimed to explore predictors of pregnancy stress and psychological birth trauma in women undergoing vaginal delivery in China. Methods: This cross-sectional study was performed at a single medical center between December 2021 and May 2022 in Hangzhou, China. Participants were selected using a convenience sampling technique. A total of 351 postpartum women within one week after vaginal delivery were included. Questionnaires were used to collect sociodemographic and obstetric characteristics and scores on the Pregnancy Stress Rating Scale (PSRS), City Birth Trauma Scale (City BiTS), Social Support Rating Scale (SSRS) and Family Adaptation Partnership Growth Affection and Resolve index (Family APGAR). Both univariate analysis and multiple linear regression analysis were conducted to assess predictors of pregnancy stress and psychological birth trauma. Results: The median (IQR) of PSRS and City BiTS scores were 10.00 (14.00) and 3.00 (9.00), respectively. The incidence of postpartum posttraumatic stress disorder was 4.0% (14/351). Parity, social support, family support and level of education were predictors of pregnancy stress. Delivery complications, psychological traumatic event, pregnancy stress and family support were predictors of psychological birth trauma (P < 0.05). Conclusion: Pregnancy stress is related to social support, family support and some sociodemographic and obstetric characteristics. Psychological birth trauma is correlated with delivery complications, psychological traumatic event, pregnancy stress and family support. Consequently, enhancing social support, especially family support, for pregnant women as a means of reducing pregnancy stress can effectively prevent psychological birth trauma. [ABSTRACT FROM AUTHOR]

Radium-223 dichloride is the first approved alpha particle-emitting radiopharmaceutical for patients with castration-resistant prostate cancer with symptomatic bone metastases and no known visceral metastases. A large percentage of intestinal enrichment and a slow clearance rate were the main causes of gastrointestinal adverse events after 223RaCl 2 administration. The molecular weight of sodium alginate in aqueous solution was determined to be 656 kDa. Sodium alginate exhibits a higher affinity for adsorbing Ra2+ compared to other metal ions belonging to the second main group. Sodium alginate as low as 0.5 g/rat reduced intestinal damage by remodeling 223RaCl 2 distribution without affecting bone resorption. Intestinal villi were preserved and enterocyte activity was maintained after sodium alginate intervention. Sodium alginate reduced DNA oxidative damage and lipid peroxidation and maintained endogenous antioxidant status by increasing superoxide dismutase levels and total antioxidant capacity. Furthermore, sodium alginate treatment mitigated DNA damage and apoptosis. The administration of sodium alginate effectively maintained the integrity of the intestinal microbiota, which had undergone perturbations due to radiation exposure. This study demonstrated that sodium alginate could be applied to reduce the adverse effects caused by radiation exposure to the intestine during 223RaCl 2 -treated and reduced intestinal damage resulted from 223RaCl 2 accumulation without affecting bone uptake. [Display omitted] • Sodium alginate exchanges ions with Ra2+ forming a macromolecular hydrogel. • Sodium alginate reduces gut 223Ra retention, no impact on bone resorption. • Sodium alginate enhances antioxidants, mitigates intestinal damage. • Sodium alginate preserves altered gut microbiota after radiation. [ABSTRACT FROM AUTHOR]

In recent years, more and more attention has been paid to international education in schools in the USA. Education professionals, business leaders, and politicians realize that schools and school leaders must identify multiple opportunities for students to interact with and experience a global society. Nationally, there has been a considerable investment of funds by several key foundations and much political talk about the need to push American education towards a model of schooling that expressly responds to the need for internationally competent citizens. Using mixed methodology design, this study is fueled by a desire to better understand several overarching elements in international education. In short, the authors of this paper posit that no further research, policy formation, or program development within the realm of international education for public schools can be undertaken until an understanding of the current state of international education and the capacity for internationalization is empirically explored. [ABSTRACT FROM AUTHOR]