A longitudinal study on the impact of perceived stress on academic engagement among deaf college students: the moderating effect of positive emotions.

Introduction: This longitudinal study sought to examine the dynamic influence of perceived stress on academic engagement among deaf college students, as well as assess the moderating role of positive emotions in this relationship. Given the unique challenges faced by deaf students in educational environments, understanding these dynamics becomes crucial for developing effective support strategies.

Methods: Across a seven-month period, encompassing two semesters, 223 deaf college students were evaluated three times using the Perceived Stress Questionnaire, the Academic Engagement Questionnaire, and the Positive Emotions Questionnaire.

A new species of Diplolepis Geoffroy (Hymenoptera: Cynipidae: Diplolepidini) from northeastern China.

A new species, Diplolepis valtonyci Zhu, Wang Pujade-Villar sp. nova, is described from Rosa rugosa Thunb. (1784) and R.

Description of a new species from China and comments on other inquiline species (Hymenoptera: Cynipidae: Synergini).

A new species, Synergus mongolicus Pujade-Villar & Wang n. sp., is described from galls collected on twigs of Quercus mongolica.

A new species of Holmgren with a key to species known from China and the Eastern Palaearctic Region (Hymenoptera, Ichneumonidae, Poemeniinae).

A new species of Poemeniinae, Sun & Sheng, , is described and illustrated. Specimens were reared from twigs of Blume in Haicheng, Liaoning province, P.R.

[Dynamic changes of soil moisture in loess hilly and gully region under effects of different yearly precipitation patterns].

Based on field determinations, the dynamic changes of soil moisture in dry farmland, Robinia pseudoacacia forestland, Hippophae shrubland and Bothriochloa ischaemum grassland in loess hilly and gully region under effects of different yearly precipitation patterns were analyzed. The results showed that yearly precipitation pattern had definite effects on the seasonal variation and profile distribution of soil moisture. In normal year, soil moisture in dry farmland had a gentle seasonal variation; in dry year, it decreased slowly before rainy season but increased markedly after rainy season; while in rainy year, it had an overall increase and the increment was remarkable after rainy season.

Measurement of laser-induced refractive index change of inverted ferroelectric domain LiNbO3.

Optical nonlinearities of periodically poled LiNbO(3) crystals were investigated by the single beam Z-scan technique with a continuous wave (cw) laser beam at 532 nm. The nonlinear optical absorption coefficient and refractive index change are determined to be 8.1 x 10(-6) cm/W and 2.