The influences of peer relationships on adolescent subjective well-being were investigated within the framework of social network analysis, using exponential random graph models as a methodological tool. The participants in the study were 1,279 students (678 boys and 601 girls) from nine junior middle schools in Shenzhen, China. The initial stage of the research used a peer nomination questionnaire and a subjective well-being scale (used in previous studies) to collect data on the peer relationship networks and the subjective well-being of the students. Exponential random graph models were then used to explore the relationships between students with the aim of clarifying the character of the peer relationship networks and the influence of peer relationships on subjective well being. The results showed that all the adolescent peer relationship networks in our investigation had positive reciprocal effects, positive transitivity effects and negative expansiveness effects. However, none of the relationship networks had obvious receiver effects or leaders. The adolescents in partial peer relationship networks presented similar levels of subjective well-being on three dimensions (satisfaction with life, positive affects and negative affects) though not all network friends presented these similarities. The study shows that peer networks can affect an individual’s subjective well-being. However, whether similarities among adolescents are the result of social influences or social choices needs further exploration, including longitudinal studies that investigate the potential processes of subjective well-being similarities among adolescents.
Logic Petri Nets (LPNs) is a high-level Petri net, which have the capability to model the batch and indeterminate processing of resources in cooperative systems. Their modeling capability is equivalent to that of inhibition Petri nets (IPNs) but the former maintains simpler net structures. This paper presents a systematic LPN synthesis approach for cooperative systems. First, a normal/logic transition with its connected places is treated as a basic design module. Then, we synthesize the basic design modules firstly to construct LPN models by connecting with shared resource places. Finally, some control strategies are designed to guarantee the resulting LPNs with desirable properties such as boundedness, liveness, and reversibility. An example for constructing an E-commerce system is proposed to illustrate the proposed approach. The paper is of significance in the sense that it provides industrial engineers and academic researchers a methodology of applying LPNs to modeling and analysis of cooperative systems.
The aim of the present study was to determine the most commonly used and primary psychotherapeutic orientations adopted by Chinese practitioners and to examine the factors associated with the choice of orientation. A nationwide survey using multi-stage convenience sampling without replacement was conducted. A total of 1,232 respondents out of the 1,325 participants selected completed the survey, which corresponds to an overall response rate of 93.0%. The respondents were practitioners who were providing consultations and psychotherapy in China at the time. The main outcome measures were the most commonly used and primary psychotherapeutic orientations. A Chi-square test was used to examine the factors associated with therapeutic orientation. The most commonly used psychotherapies were cognitive therapy (59.2%), behavioral therapy (38.1%) and the psychoanalytic/psychodynamic model (29.4%). The primary orientations were cognitive therapy (41.6%), the psychoanalytic/psychodynamic model (15.7%) and cognitive-behavioral therapy (10.3%). Gender had no effect on the orientation choice. Cognitive therapy was used significantly more by respondents who were ≤30 years old (50.5%), who had been in practice ≤3 years (45.9%), received continuing education ≤64 h (47.2%) and accepted no clinical supervision (53.1%). Those who were ≥31 years old (18.4%), had been in practice ≥7 years (21.0%), received continuing education ≥65 h (23.6%), worked full-time (20.2%) and accepted clinical supervision (20.6%) used the psychoanalytic/psychodynamic model significantly more. The respondents who used cognitive-behavioral therapy had graduated from the medical profession (14.1%) and were not licensed (15.8%). Cognitive therapy and the psychoanalytic/psychodynamic model were the two most popular orientations adopted by Chinese counselors and psychotherapists. Age, years of practice, graduate profession, continuing education, working hours (full/part-time), licensure and supervision are significant factors that affect the choice of orientation.
BackgroundRumex patientia L. is consumed as a green vegetable in several parts of the world, and can withstand extremely low temperatures (-35°C). However, little or no available genomic data for this species has been reported to date. Here, we used Illumina Hiseq technology for transcriptome assembly in R. patientia under normal and cold conditions to evaluate how it responds to cold stress.ResultsAfter an in-depth RNA-Seq analysis, 115,589 unigenes were produced from the assembled transcripts. Based on similarity search analysis with seven databases, we obtained and annotated 60,157 assembled unigenes to at least one database. In total, 1,179 unigenes that were identified as differentially expressed genes (DEGs), including up-regulated (925) and down-regulated ones (254), were successfully assigned GO annotations and classified into three major metabolic pathways. Ribosome, carbon metabolism, oxidative phosphorylation and biosynthesis of amino acids were the most highly enriched pathways according to KEGG analysis. Overall, 66 up-regulated genes were identified as putatively involved in the response to cold stress, including members of MYB, AP2/ERF, CBF, Znf, bZIP, NAC and COR families.ConclusionTo our knowledge, this investigation was the first to provide a cold-responsive (COR) transcriptome assembly in R. patientia. A large number of potential COR genes were identified, suggesting that this species is suitable for cultivation in northern China. In summary, these data provide valuable information for future research and genomic studies in R. patientia.
A delayed predator–prey system with diffusion and Dirichlet boundary conditions is considered. By regarding the growth rate a of prey as a main bifurcation parameter, we show that Hopf bifurcation occurs when the parameter a is varied. Then, by using the center manifold theory and normal form method, an explicit algorithm for determining the direction of the Hopf bifurcations and stability of the bifurcating periodic solutions is derived.
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