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With the COVID-19 pandemic, concerns are raised across all populations and human activities. In higher education, college students with disabilities generally experience higher stress levels compared to peers without disabilities. The pandemic continues to negatively affect the well-being of college students with disabilities. In this study, we explored the impact of the COVID-19 pandemic on 105 college students with disabilities. We conducted a multiple mediation analysis to examine if the five pillars: positive emotion, engagement, relationships, meaning, and accomplishment (PERMA) mediated the relationship between stress level during COVID-19 and college problems. The result revealed that stress level during COVID-19 was significantly associated with all five PERMA pillars and stress level during COVID-19 significantly impacted college problems. Positive emotion was found to be the only significant mediator in the relationship between stress level during COVID-19 and college problems. This study highlighted the importance of helping to facilitate positive emotions for college students with disabilities under pandemic stress, as well as provided directions for post-pandemic recovery support. Keywords: COVID-19, stress, PERMA, college problems, college students, disability, Cultic groups involve individuals from all educational levels, socioeconomic statuses, genders, and ages, with some members being born into cults. Although the body of literature pertaining to experiences of individuals [...]

During the pandemic, sedentary behavior and social isolation threatened college students' physical and mental health. The effectiveness of Sport Education on combinations of variables associated with well-being and physical activity was explored. Undergraduate students (N = 236) participated in a 15-week intervention; Sport Education (experimental) was compared to Direct Instruction (control). A structural equation modeling approach and Causal Mediation Analyses were conducted to test hypothesized models. A mixed factorial ANOVA was used to examine physical activity engagement. Sport Education students participated in physical activity significantly longer than the Direct Instruction group at posttest; student perceived role and task orientation significantly predicted physical activity engagement, social dysfunction, and perceived stress in the Sport Education condition. Given the climate, college students became more task-oriented, socially supported, and stress relieved through Sport Education. Future longitudinal and qualitative inquiries are encouraged to examine the effectiveness of Sport Education in motivating lifelong physical activity and well-being.

Flax and carbon fibers reinforced polymer composites have high potentials to be used as sustainable building materials. To understand the impact resistance of these fiber composites, the present article studied the impact resistance of unidirectional flax fiber and carbon fiber reinforced polymer (FFRP and CFRP) composite plates. The impact response, damage resistance, and impact tolerance were investigated using drop hammer impact and compression after impact (CAI) tests. The internal damage of FFRP and CFRP due to impact loads was studied using acoustic emission technology. In addition, the development process of impact damage was analyzed. CFRP plates show a higher specific energy absorption rate than that of FFRP, because of the more serious internal damage and brittle fracture tendencies. Matrix cracking was the primary damage in FFRP and CFRP under impact load. Compared with CFRP, FFRP possesses a higher CAI due to less damage. Further expansion of the matrix crack caused by the original impact occurs in the impacted fiber-reinforced polymer composites (FRP) under a compressive load. [ABSTRACT FROM AUTHOR]

Camellia oleifera, an important tree species and source of edible oil in China, has received significant attention owing to the oil's high unsaturated fatty acid content, which has benefits for human health. However, the mechanisms underlying C. oleifera yield and oil quality are largely unknown. In this study, 180 F1 progenies were obtained from two parents with obvious differences in fruit- and oil-related traits. We constructed a high-density genetic map using a double digest restriction site-associated DNA sequencing (ddRAD-Seq) strategy in C. oleifera. This map spanned 3327 cM and anchored 2780 markers in 15 linkage groups (LGs), with an average marker interval of 1.20 cM. A total of 221 quantitative trait loci (QTLs) associated with fruit- and oil-related traits were identified across three years' worth of phenotypic data. Nine QTLs were detected simultaneously in at least two different years, located on LG02, LG04, LG05, LG06, and LG11, and explained 8.5–16.6% of the phenotypic variation in the corresponding traits, respectively. Seventeen major QTLs were obtained that explained 13.0–16.6% of the phenotypic variance. Eleven and five flanking SNPs of major QTLs for fruit- and oil-related traits were detected which could be used for marker-assisted selection in C. oleifera breeding programs. Furthermore, 202 potential candidate genes in QTL regions were identified based on the collinearity of the genetic map and the C. oleifera "CON" genome. A potential regulatory network controlling fruit development and oil biosynthesis was constructed to dissect the complex mechanism of oil accumulation. The dissection of these QTLs will facilitate the gene cloning underlying lipid synthesis and increase our understanding in order to enhance C. oleifera oil yield and quality. [ABSTRACT FROM AUTHOR]

Large-tow carbon fiber-reinforced polymer composites (CFRP) have great application potential in civil engineering due to their low price, but their basic mechanical properties are still unclear. The tensile properties of large-tow CFRP rods and plates were investigated in this study. First, the tensile properties of unidirectional CFRP rods and plates were studied, and the test results of the relevant mechanical properties were statistically analyzed. The tensile strength of the CFRP rod and plate are 2005.97 MPa and 2069.48 MPa. Second, the surface of the test specimens after failure was observed using a scanning electron microscope to analyze the type of failure and damage evolution process. Finally, the probabilistic characteristics of the mechanical properties were analyzed using normal, lognormal, and Weibull distributions for parameter fitting. Quasi-optimality tests were performed, and a probability distribution model was proposed for the mechanical properties of large-tow CFRP rods and plates. [ABSTRACT FROM AUTHOR]

Unidirectional carbon fiber-reinforced polymer (CFRP) may exhibit significant mechanical softening in the transverse direction at an elevated temperature. While significant transverse compressive stress exists on CFRP due to the clamping force from anchorage, a CFRP cable may exhibit anchorage failure when suffering an accidental fire disaster. The high-temperature resistance of a CFRP cable anchorage is critical, and clarifying the performance deterioration and failure mechanism of a CFRP cable anchorage system at elevated temperature is fundamental for clarifying its fire resistance. This paper reviews the current research status of the high-temperature resistance of CFRP cable anchorage systems from two aspects, including the high-temperature resistance of the comprising materials and the anchorage system. The reviews on the high-temperature properties of the comprising materials are summarized from two aspects. Firstly, the mechanical performance degradation of bonding epoxy resin at elevated temperatures and the effect of a filler on its mechanical–thermal properties are analyzed. Secondly, the mechanical performances of CFRP composites at elevated temperatures are summarized, with consideration of the stress state of the CFRP cable under the constraint of an anchorage device. The reviews on the high-temperature resistance of the anchorage system also include two aspects. Firstly, the temperature field solution method for the anchorage system is summarized and discussed. Secondly, the current research status of the anchorage performance at elevated temperatures is also summarized and discussed. Based on these reviews, the research shortage of the high-temperature resistance of CFRP cable anchorage systems is summarized, and further research is recommended. [ABSTRACT FROM AUTHOR]