Objective: To explore the effectiveness of machine learning in predicting adolescent Internet gaming disorder, so as to provide guidance for formulating effective intervention measures. Methods: From June to September，2023，a total of 2 100 students from 3 middle schools and 3 high schools in Bijie City, Qianxi City and Jinsha County, Guizhou Province were selected by stratified random cluster sampling as research subjects. Data was collected by using several instruments, including the Nine item Internet Gaming Disorder Scale-Short From (IGDS9-SF), Parental Psychological Control and Autonomy Support Questionnaire(PPCASQ), Motivation Structure Questionnaire, Relative Deprivation Questionnaire, Deviant Peer Association Questionnaire, and Dual Systems of Self control Scale. Descriptive statistical analysis was conducted to characterize the sample features, and the distribution differences of categorical variables were analyzed by using Chi square test and Mann-Whitney U test. Demographic variables and various influencing factors were served as independent variables, and whether adolescents were addicted to Internet gaming was the dependent variable. Various machine learning algorithms, including random forest, Logistic regression, support vector machine, gradient boosting trees, decision trees, and adaptive boosting were employed to construct predictive models. Results: The detection rate of Internet gaming disorder among adolescents was 4.57% (96 cases). Males and middle school students had higher Internet gaming disorder detection rates (5.52%,6.29%) than females and high school students (3.32%,3.62%), and the differences were statistically significant ( χ 2=5.71,7.86, P ＜0.01).The scores of relative deprivation,deviant peer affiliation, paternal psychological control, maternal psychological control, control motivation, impulsive system and its dimensions (impulsivity, distractibility, low delay of gratification) in Internet gaming disorder group were higher than in non Internet gaming disorder, while the score of parental autonomy support was lower than that in the non Internet gaming disorder group ( Z =-2.88,-9.32,-4.13,-4.48, -6.58 ,-7.50,-7.18,-7.56,-7.43,-2.27, P <0.05). The adaptive boosting algorithm performed the best (accuracy=99%, recall=95%, F1 score=97%, AUC=0.96). Random forest and gradient boosting trees also performed excellently (accuracy=98%, recall=95%, F1 score=97%, 96%, AUC=0.96). Conclusions Compared to other models, the adaptive boosting algorithm shows a good predictive effectiveness for adolescent Internet gaming disorder. Appropriate models should be selected to identify individuals with Internet gaming disorder as early as possible, to develop effective intervention strategies and reduce the risk of Internet gaming disorder.

Objective To study the degradation behavior and mechanical properties of magnesium alloy plate on treatment of tibial fracture in New Zealand rabbits. Methods Thirty-six adult New Zealand rabbits were randomly divided into experimental group (magnesium alloy bone plate group, n=18) and control group (titanium alloy bone plate group, n=18). Tibial fractures in experimental group and control group were fixed with magnesium alloy bone plate and titanium alloy bone plate, respectively. After operation, X-ray, scanning electron microscopy, energy spectrum analysis, weight loss test and four-point bending test were performed in each group to analyze the degradation behavior and mechanical properties of magnesium alloy plate after tibial fracture treatment. Results Magnesium alloy bone plate could be degraded gradually in vivo. The degradation of magnesium alloy bone plate was deepened gradually with the implantation time, and the surface was corroded uniformly. The mechanical properties of magnesium alloy bone plate decreased gradually with the degradation in vivo. Conclusions Magnesium alloy bone plate can degrade gradually with fracture healing in vivo, and its mechanical properties gradually decline, but it can still meet the requirements of fracture internal fixation, and is a kind of good new degradable orthopedic implant material.

Purpose: This study explored the mediating effect of career calling in the relationship between familysupportive supervisor behaviors and turnover intention among nurses. Methods: Data were gathered from 563 nurses enrolled in eight public hospitals in China. They were required to complete measures of family-supportive supervisor behaviors, career calling, and turnover intention. Hierarchical multiple regression analysis and the bootstrapping procedure were used to examine the mediating role of career calling. Results: Family-supportive supervisor behaviors were positively associated with career calling, but negatively associated with turnover intention. Furthermore, career calling partially mediated the relationship between family-supportive supervisor behaviors and turnover intention. Conclusion This study provides strong evidence for an increasing body of work that emphasizes the importance of nursing leaders engaging in family-supportive behaviors for increasing employee career calling and reducing turnover intention.

Purpose: This study explored the mediating effect of career calling in the relationship between familysupportive supervisor behaviors and turnover intention among nurses. Methods: Data were gathered from 563 nurses enrolled in eight public hospitals in China. They were required to complete measures of family-supportive supervisor behaviors, career calling, and turnover intention. Hierarchical multiple regression analysis and the bootstrapping procedure were used to examine the mediating role of career calling. Results: Family-supportive supervisor behaviors were positively associated with career calling, but negatively associated with turnover intention. Furthermore, career calling partially mediated the relationship between family-supportive supervisor behaviors and turnover intention. Conclusion This study provides strong evidence for an increasing body of work that emphasizes the importance of nursing leaders engaging in family-supportive behaviors for increasing employee career calling and reducing turnover intention.

Objective:To explore the mechanism of the influence of just world belief on depression in college students, and to explore the multiple mediating effects of hope and forgiveness.Methods:Totally 290 college students were assessed by belief in a just world scale(BJWS), adult dispositional hope scale(ADHS), Hearland forgiveness scale(HFS) and self-rating depression scale(SDS).Results:The scores of the belief in a just world, hope, forgiveness and depression were 53.90±7.83, 33.67±3.87, 109.75±12.52 and 16.84±8.41, respectively.The belief in a just world was positively correlated with hope( r=0.41, P<0.01) and forgiveness( r=0.40, P<0.01), and negatively correlated with depression( r=-0.38, P<0.01). Hope was positively correlated with forgiveness( r=0.43, P<0.01), and negatively correlated with depression( r=-0.53, P<0.01). Forgiveness had a significantly negative correlation with depression( r=-0.57, P<0.01). Structural equation model showed that the direct effect of the belief in a just world on depression was not statistically significant.The belief in a just world can influence depression by multiple mediators of hope(the effective amount=0.26), hope→forgiveness(the effective amount=0.20), and the model fitted well(χ 2/ df=1.63, RMSEA=0.04, GFI=0.96, NFI=0.98, CFI=0.99). Conclusion:The belief in a just world can influence depression by multiple mediators role of hope, hope→forgiveness.

Objective To explore the mediating effect of overgeneral autobiographical memory between shame and depression in college students.Methods Randomly selected 205 undergraduates were tested using Shame Scale (SS),the Center for Epidemiologic Studies Depression Scale (CES-D) and the Autobiographical Memory Test(AMT).Results (1) The total score of shame was (58.46± 12.34).The total score of overgeneral autobiographical memory was (5.19 ± 2.1 1).The total score of depression was (19.62±5.36).The correlation results showed that the sense of shame,the overgeneral autobiographical memory and depression were positively correlated with each other(r=1.99,0.48,0.28;all P＜0.01).(2)Mediation effect analysis and further Boot-strap test showed that sense of shame positively predicted depression,and overgeneral autobiographical memory partly mediated the association between the shame and depression,accounting for 10％ of total effect.Conclusion During the clinical treatment of depression,medical profession can reduce the depression caused by shame by intervening in the generalization of autobiographical memory of patients with depression.

Objective: To explore the mediating effects of self-focused attention between social anxiety and interpersonal needs. Methods: Totally 467 college students [159 males and 221 females, mean age (21 ±2)] were assessed with the Social Anxiety Scale (SAS), Self-Focused Attention Scale (SFAS) and Interpersonal Needs Questionnaire (INQ ). The bootstrap method was used to test the mediating effect Results: The SFAS and INQ scores were higher in female students than in males (Ps <0.01). The scores of SAS, SFAS, and INQ were positively correlated each other (r = 0.20 - 0.90, Ps < 0.01). Self-focused attention has a full mediating effect between social anxiety and interpersonal needs, and the 95％ confidence interval was (0.34, 0.59). Conclusion: It suggests that the effect of interpersonal needs on social anxiety may be achieved through self-focused attention in college students. Reducing the level of self-focused attention may be an important way to alleviate social anxiety among college students.

Objective To investigate the characteristics and mechanisms of attentional bias in anxiety sensitivity individuals.Methods By using Anxiety Sensitivity Index (ASI),23 participants were included in the high score group and 20 participants were included in the low score group.Then,2 (between-subject factor:the high and low score group) ×2 (within-subject factor:the positive and negative picture) mixed design experiments were adopted.Emotional faces picture pairs were chosen as stimuli.Picture pairs were presented 100 ms in experiment 1 and 1 250 ms in experiment 2.Dot-probe task was adopted to inspect the attentional bias and the response time and correct rate were recorded.Results Experiment 1 implied the main effect of type of pictures was found in mixed design experiments(F(1,41)=4.40,P＜0.05).The reaction time of two groups in positive pictures was greater than zero((12.22±30.24) ms vs (10.07±21.55) ms).It showed input effect to positive pictures.An input effect due to the reaction time of the high score group was greater than zero to negative pictures((4.81± 17.88)ms),while the low score group tended to avoid the negative pictures ((-6.81 ±21.33) ms).Experiment 2 implied positive score was not significant between two groups (F(1,41) =0.29,P＞0.05).And positive score showed the attentional bias to some certain extent.Significant outcome was found by negative score between two groups (F(1,41) =6.41,P＜0.05).It implied that the high score group tended to avoid the negative pictures and the low score group had the tendency of input effect.Conclusion At the initial stage of attention,anxiety sensitivity individuals had the attentional bias to negative emotional faces and avoidance in the late stage of attention.It suggests that the attentional bias of anxiety sensitivity individuals may have an important effect on the development of the mental disorders.

Objective To explore the character of ruminant thinking individuals in cold executive functions(cool EF) and hot executive functions(hot EF).Methods According to the score of rumination response scale( RRS) ,17 low-level ruminant thinking individuals and 21 high-level ruminant thinking indi-viduals were screened out and finished the classic Stroop test.Results In the cool EF,it was consistent be-tween low-level and high-level ruminant thinking individuals for color naming task response time ((10.61± 23.20)ms vs (10.79±29.32)ms),and there was no significant difference in the classic Stroop test( t=0.21, P>0.05) .In the hot EF,the respone time of the low-level group was longer than that of high-level group on the positive and negative((-5.01±22.20)ms vs (-10.88±20.33)ms;(8.78±29.96)ms vs (-8.68±19.94) ms) ,and the main effect of the emotional Stroop interference scores between positive and negative words was highly significant(F=10.88, P<0.05) .The interactive effect of emotional Stroop interference scores of words × subjects was significant(F=5.70, P<0.05) .The simple effect tests showed that the emotional Stroop interfer-ence scores between high-level and low-level ruminant thinking subjects were significant in the negative group(F=4.69, P<0.05) .And it was also significant between positive and negative words in the low-level group(F=14.63, P<0.05).Conclusion Two types of subjects in the cold EF have no significant difference. High-level ruminant thinking individuals in the cold EF are normal,but impaired in the hot EF that meaning high-level ruminant thinking individuals had bias to negative emotion.These results provide new clues for the intervention of negative emotions caused by ruminants.

Objective To investigate the impact of negative perfectionism on negative emotion(anxiety,depression) and the moderating effects of positive perfectionism.Methods A study was designed and a sample of 380 college students completed questionnaires including PANPS,SAS and SDS.Results ① Correlation analysis indicated positive perfectionism was negatively correlated with anxiety and depression (r1 =-0.25,P1 ＜0.01,r2 =-0.29,P2＜0.01),while negative perfectionism was positively correlated with anxiety and depression(r1 =0.26,P1 ＜0.01,r2 =0.22,P2＜0.01).② Moderating effects analysis indicated that positive perfectionism significantly moderated the regulating effect of negative perfectionism upon negative emotions(anxiety,depression) (β 1 =-2.64,β2 =-7.67,P＜0.01).Conclusion These findings suggest that the higher level of positive perfectionism,the greater influence of perfectionism on depression and anxiety,and positive perfectionism could buffer the negative perfectionism on anxiety and depression.