Dialect variation,dialect-shifting,and reading comprehension in second grade

The purpose of this study was to examine second graders’ (n = 680) changing spoken nonmainstream American English (NMAE) use in relation to their oral language and reading comprehension achievement. Fall NMAE production was negatively associated with fall achievement scores. NMAE production generally decreased from fall to spring. Students who qualified for the US Free and Reduced Lunch program (FARL) and who had stronger language skills were more likely to decrease their NMAE use (i.e., dialect shifting) than their peers who did not qualify for FARL or their peers with weaker language skills. Dialect shifting for a sub-sample of 102 students who used substantial amounts of NMAE at the beginning of the school year was predicted by school context, controlling for reading and language skills—in general, students who attended more affluent schools dialect shifted to a greater extent than did their peers who attended higher poverty schools. Greater dialect shifting in this group predicted gains in reading comprehension from fall to spring.     

Understanding the influence of teachers’ cognitive and affective responses upon school inspection feedback acceptance

Despite the developmental perspective of school inspections, teachers in inspected schools are not always willing to accept the school inspection’s feedback for their further improvement of teaching and learning processes. Literature distinguishes several aspects of feedback that stimulate or hinder the acceptance of feedback, such as recipient’s cognitive and affective responses to feedback. This study investigates teachers’ cognitive and affective responses to school inspection feedback in relation to feedback acceptance. It draws on data from 21 in-depth interviews with teachers in eight primary schools. We found that positive perceptions of the inspectors’ credibility enhance teachers’ feedback acceptance. This is also the case for positive, clear feedback. Under these circumstances, emotions of joy, happiness and relief are expressed. Conversely, respondents tend to reject feedback when inspectors are perceived to be inadequately informed, arrogant or disrespectful. When negative feedback is rated as unfair, negative emotions, such as anger and sadness, interfere with feedback acceptance. In essence, we conclude that both feedback content and feedback source characteristics are decisive in the acceptance of process. From a practical perspective, the findings suggest there is a need to build on supportive relationships between teachers and school inspectors.     

A Sneak Peek into 5G Communications

The world of mobile communications is poised for yet another disruptive transformation – the introduction of 5G. It will change the way mobile phones communicate. New technologies at the device level and novel network architectures to manage them will be soon seen everywhere. This article explores what 5G is all about. It also talks briefly about the preparations underway across the globe to deploy 5G by 2020.     

College Match and Undermatch: Assessing Student Preferences,College Proximity,and Inequality in Post-College Outcomes

Recently, multiple studies have focused on the phenomenon of “undermatching”—when students attend a college for which they are overqualified, as measured by test scores and grades. The extant literature suggests that students who undermatch fail to maximize their potential. However, gaps remain in our knowledge about how student preferences—such as a desire to attend college close to home—influence differential rates of undermatching. Moreover, previous research has not directly tested whether and to what extent students who undermatch experience more negative post-college outcomes than otherwise similar students who attend “match” colleges. Using ELS:2002, we find that student preferences for low-cost, nearby colleges, particularly among low-income students, are associated with higher rates of undermatching even among students who are qualified to attend a “very selective” institution. However, this relationship is weakened when students live within 50 miles of a match college, demonstrating that proximity matters. Our results show that attending a selective postsecondary institution does influence post-college employment and earnings, with less positive results for students who undermatch as compared with peers who do not. Our findings demonstrate the importance of non-academic factors in shaping college decisions and post-college outcomes, particularly for low-income students.     

Complementary feeding patterns among ethnic groups in rural western China

Objective

This study investigated complementary feeding practices among four ethnic groups (Han, Uygur, Tibetan, and Zhuang) based on a cross-sectional survey in rural western China.

Methods

In 2005, a stratified multistage cluster random sampling method was used to recruit 9712 children (7411 Han, 1032 Uygur, 678 Tibetan, and 591 Zhuang) between 6 and 35 months of age and their mothers from 45 counties in 10 provinces (autonomous regions, municipalities) in western China.

Results

The rates of early introduction (before 6 months) of complementary foods in four ethnic groups (Han, Uygur, Tibetan, and Zhuang) were 71.30%, 95.95%, 82.40%, and 72.30%, respectively. The Infant and Child Feeding Index (ICFI) for Uygur and Tibetan children was lower than that for Han children at all age groups. Uygur children were more likely to have unqualified ICFI compared with Han children in a multivariate logistic regression (odds ratio (OR)=5.138, 95% confidence interval (CI): 4.340–6.084). A higher level of maternal education, greater family wealth, and the availability of complementary feeding educational materials decreased the likelihood of an unqualified ICFI. The nutritional status of children (Han, Tibetan, and Zhuang) with qualified ICFI was better than that for children with unqualified ICFI.

Conclusions

Appropriate interventions are required to improve complementary feeding practices in rural western China.

     

Anti-senescence effect and molecular mechanism of the major royal jelly proteins on human embryonic lung fibroblast (HFL-I) cell line

Royal jelly (RJ) from honeybee has been widely used as a health promotion supplement. The major royal jelly proteins (MRJPs) have been identified as the functional component of RJ. However, the question of whether MRJPs have anti-senescence activity for human cells remains. Human embryonic lung fibroblast (HFL-I) cells were cultured in media containing no MRJPs (A), MRJPs at 0.1 mg/ml (B), 0.2 mg/ml (C), or 0.3 mg/ml (D), or bovine serum albumin (BSA) at 0.2 mg/ml (E). The mean population doubling levels of cells in media B, C, D, and E were increased by 12.4%, 31.2%, 24.0%, and 10.4%, respectively, compared with that in medium A. The cells in medium C also exhibited the highest relative proliferation activity, the lowest senescence, and the longest telomeres. Moreover, MRJPs up-regulated the expression of superoxide dismutase-1 (SOD1) and down-regulated the expression of mammalian target of rapamycin (MTOR), catenin beta like-1 (CTNNB1), and tumor protein p53 (TP53). Raman spectra analysis showed that there were two unique bands related to DNA synthesis materials, amide carbonyl group vibrations and aromatic hydrogens. These results suggest that MRJPs possess anti-senescence activity for the HFL-I cell line, and provide new knowledge illustrating the molecular mechanism of MRJPs as anti-senescence factors.     

Photoresists for microlithography

Photoresist technology, which is used for micro-patterning exploits changes in properties of polymeric materials, such as their solubility or volatility, upon photo-irradiation. This process has greatly benefitted from the knowledge base of organic chemistry and photo-induced organic transformations. The role of chemistry in the development of photoresists is described in this article.