A conditional indirect effect of language brokering on adjustment among Chinese and Korean American adolescents : the roles of perceived maternal sacrifice, respect for the mother, and mother-child open communication

textAsian American adolescents, such as Chinese and Korean American adolescents, often language broker for their immigrant parents. This study examines how language brokering influences parent-child relationships and adolescents' psychological adjustment in Asian-American families. Using a two-wave sample of Chinese (n = 237; average age = 14.65, SD = .68) and Korean (n = 262; average age = 14.72, SD = .69) American adolescents, this study examined a culturally relevant conditional mechanism through which language brokering may contribute to lower levels of internalizing/externalizing problems. Results suggested that language brokering for the mother was associated with perceived maternal sacrifice, which was in turn associated with respect for the mother, which was eventually associated with lower levels of externalizing problems (but not internalizing problems) in the adolescents. Moreover, the indirect effect was conditional on the level of mother-child open communication. With a lower level of open communication, the indirect effect of language brokering on externalizing problems became stronger. Results indicate that interventions designed to reduce Asian American adolescent language brokers' externalizing problems can target their perception of parental sacrifice and their respect for parents, and that this approach may be especially effective for adolescents experiencing a low level of parent-child open communication. At the same time, for these families with low levels of parent-child open communication, encouraging more open communication may be an additional way to intervene.Human Development and Family Science

Complex effects of language brokering among Chinese immigrant families : integrating variable-centered and person-centered approaches

Children and adolescents in linguistic minority families, such as Chinese American families, often serve as language brokers; that is, they are the translators or interpreters for their parents who have limited English proficiency. Despite a growing number of scholarly investigations on language brokering, evidence regarding its developmental outcomes remains mixed. To disentangle the complex effects of language brokering, two separate but complementary studies were conducted. Specifically, Study 1 took a variable-centered approach and examined the mechanisms of the complex effects of language brokering frequency, while Study 2 took a person-centered approach and explored subgroups of language brokers based on language brokering feelings and identified predictors and outcomes of subgroup memberships (including a known subgroup of non-brokers). Participants were Chinese American adolescents (N = 252 for Study 1; N = 394 for Study 2 including non-brokers) residing in Northern California who were surveyed when they were in high school (T1; Mage = 17.0; SD = 0.73; 61% female) and again four years later (T2). In Study 1, it was found that frequent language brokering for mothers was associated with brokering-related maternal dependence, which was in turn simultaneously associated with both brokering-related mother-child mutual regard and mother-child role reversal across language brokers’ adolescence and emerging adulthood. In addition, the positive impact of frequent language brokering diminished when language brokers did not perceive warmth from their mothers’ parenting behaviors. In Study 2, two distinct subgroups of adolescent language brokers were identified using latent profile analyses based on language brokering feelings: efficacious brokers and burdened brokers. A key predictor that distinguished the two language broker groups was bilingual proficiency, such that those who were proficient in both English and Chinese were more likely to be efficacious brokers. Moreover, compared to non-brokers, efficacious brokers were not significantly affected by or even benefitted from translating, while burdened brokers’ parent-child relationships and psychosocial well-being were at risk due to brokering. Finally, the majority of adolescents remained in the same subgroups over time, and those who were burdened at both times and those who later became burdened showed poorer adjustment in emerging adulthood than other subgroups.Human Development and Family Science

All-fiber normal-dispersion single-polarization passively mode-locked laser based on a 45°-tilted fiber grating

An all-fiber normal-dispersion Yb-doped fiber laser with 45- tilted fiber grating (TFG) isto the best of our knowledgeexperimentally demonstrated for the first time. Stable linearly-chirped pulses with the duration of 4 ps and the bandwidth of 9 nm can be directly generated from the laser cavity. By employing the 45 TFG with the polarization-dependent loss of 33 dBoutput pulses with high polarization extinction ratio of 26 dB are implemented in the experiment. Our result shows that the 45 TFG can work effectively as a polarizerwhich could be exploited to singlepolarization all-fiber lasers

Academic grit scale for Chinese middle- and upper-grade primary school students:Testing its factor structure and measurement invariance

The Academic Grit Scale (AGS) is a novel measure of academic-specific grit. However, its factor structure and measurement invariance have yet to be thoroughly supported. The present study tested the factor structure and measurement invariance of the AGS with a large sample of early adolescents (aged 9–14 years) from China (N = 1,894). The bifactor model showed that the AGS was predominately accounted for by the general factor rather than the domain-specific factors; the parallel model from the AGS’s one-factor model showed good fit indices; thus, the AGS should be described as a univocal solution and reported as the total score. Gender and grade measurement invariance were supported at a scalar level, warranting further mean difference comparisons. In addition, academic grit was significantly associated with positive academic emotions and academic achievement, yielding evidence of good criteria-related validity. The current study contributes additional evidence to the construct validity of the Chinese version of the AGS among middle- and upper-grade primary school students in China.</p

Spatial Distribution Changes in Nature-Based Recreation Service Supply from 2008 to 2018 in Shanghai, China

Nature-based recreation has become an important activity in contemporary society and a key component of cultural ecosystem services. Although the methods of mapping the outdoor recreation supply have been gradually improved, few studies have carried out multi-temporal evaluations. Based on land use/land cover (LULC), POI, and other web-open data, we mapped the recreational service supply in Shanghai in 2008 and 2018, combining recreation potential and recreation opportunities. We first selected the evaluation indicators, using LULC to measure recreational potential, and POI density and accessibility to measure recreational opportunities. Then, we used principal component analysis (PCA) to determine the weights of the 12 factors that measure recreational opportunities, and made RO and RP maps, respectively. Finally, we overlaid RO and RP maps to obtain the spatial distribution map of recreation service supply. Our results showed that the supply of recreation services in 2008 and 2018 presented a “V-shaped” gradient along the city center areas—the peri-urban areas—the rural areas. Compared with the year 2008, the average recreation value decreased in nine regions, but increased in Chongming District in 2018. The assessment and mapping of recreation service supply value provide a basis for the development of local recreational resources, land use decisions, and the management of recreational cultural ecosystem services

Spatial Distribution Changes in Nature-Based Recreation Service Supply from 2008 to 2018 in Shanghai, China

Nature-based recreation has become an important activity in contemporary society and a key component of cultural ecosystem services. Although the methods of mapping the outdoor recreation supply have been gradually improved, few studies have carried out multi-temporal evaluations. Based on land use/land cover (LULC), POI, and other web-open data, we mapped the recreational service supply in Shanghai in 2008 and 2018, combining recreation potential and recreation opportunities. We first selected the evaluation indicators, using LULC to measure recreational potential, and POI density and accessibility to measure recreational opportunities. Then, we used principal component analysis (PCA) to determine the weights of the 12 factors that measure recreational opportunities, and made RO and RP maps, respectively. Finally, we overlaid RO and RP maps to obtain the spatial distribution map of recreation service supply. Our results showed that the supply of recreation services in 2008 and 2018 presented a &ldquo;V-shaped&rdquo; gradient along the city center areas&mdash;the peri-urban areas&mdash;the rural areas. Compared with the year 2008, the average recreation value decreased in nine regions, but increased in Chongming District in 2018. The assessment and mapping of recreation service supply value provide a basis for the development of local recreational resources, land use decisions, and the management of recreational cultural ecosystem services

An Enhanced Localization Method for Moving Targets in Coal Mines Based on Witness Nodes

An enhanced localization method based on witness nodes (WitEnLoc) is proposed, in which some sensing nodes are selected as witness nodes to confirm the existence of the target at the site given by the initial localization value and improve the accuracy of the existing localization system. WitEnLoc is primarily comprised of three stages: initial value calculation, target node searching, and search result correction. During the initial value calculation stage, the initial value is obtained using the existing localization system, and witness nodes are determined using the IoT (Internet of Things) control platform. In the target node searching stage, inward and/or outward searches are conducted in order to reduce the scope of each target node. During the search result correction stage, the search results are used to correct the initial value in order to obtain a more accurate final value. The simulation results indicate that the proposed WitEnLoc method can significantly improve the accuracy of the existing localization system

Supramolecular metallacycles with a 'pseudo double-paracyclophane' structure based on flexible π-conjugated linkers

International audienceThe straightforward synthesis of new supramolecular metallacycles having a 'pseudo double-paracyclophane' structure is presented. They are obtained from the reaction of a pre-assembled Cu(i) bimetallic precursor bearing short intermetallic distances with cyano-capped homoditopic π-conjugated linkers having flexible central cores