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281.
The peer context features prominently in theory, and increasingly in empirical research, about ethnic‐racial identity (ERI) development, but no studies have assessed peer influence on ERI using methods designed to properly assess peer influence. We examined peer influence on ERI centrality, private, and public regard using longitudinal social network analysis. Data were drawn from two sites: a predominantly Latina/o Southwestern (SW) school (N = 1034; Mage = 12.10) and a diverse Midwestern (MW) school (N = 513; Mage = 11.99). Findings showed that peers influenced each other's public regard over time at both sites. However, peer influence on centrality was evident in the SW site, whereas peer influence on private regard was evident in the MW site. Importantly, peer influence was evident after controlling for selection effects. Our integration of developmental, contextual, and social network perspectives offers a fruitful approach to explicate how ERI content may shift in early adolescence as a function of peer influence. 相似文献
282.
Sofia A. Villenas 《Educational Studies A Journal of the American Educational Studies Association》2015,51(1):72-84
This article invites imaginings of democracy and education with and through “other” knowledges. It argues for the possibilities of working across difference as articulated in the transnational, border, and decolonial perspectives of Chicana/Latina feminisms. Specifically, it explores Gloria Anzaldúa's notions of nos/otras (we, we/they, us/them), and conocimiento (knowledge with wisdom) as an example of thinking with other knowledges in civic praxis. Notions of community and civic engagement are then examined through a personal testimonio stemming from early memories of participation in a civic organization's sponsored essay contest, “What my community means to me.” Testimonio is used to critique civic exclusions but also to reimagine and animate other knowledges in the development of conocimiento for redefining community and civic participation. Lastly, this article briefly explores one example of how local activists are building communities of civic praxis for racial justice. Latina/Chicana feminisms are useful for reflecting on practices of community and coalition building across difference in a cross-race, cross-class coalitional context. 相似文献
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Increasingly, the literature suggests that the sense of coherence (SOC) positively influences well-being in later life. This study reports the assessment of the following psychometric properties: distributional properties, construct, criterion and external-related validities, and reliability of the Orientation to Life Questionnaire (OtLQ) in an cross-national population of older adults. We recruited 1291 community-dwelling older adults aged between 75–102 years (M = 83.9; SD = 6.68). Convenience sampling was used to gather questionnaire data. The construct validity was asserted by confirmatory factor analysis and convergent and discriminant validity. Moreover, criterion and external-related validities, as well as distributional properties and reliability, were also tested. Data gathered with the 29-items OtLQ scale showed overall good psychometric properties in terms of distributional properties, construct, criterion, and external-related validities, as well as reliability. Three factors were validated for the OtLQ scale: (a) comprehensibility; (b) manageability; and (c) meaningfulness. We validated the three-factor OtLQ scale, which produced valid and reliable data for a cross-national sample with older adults. Hence, it is an adequate instrument for assessing sense of coherence among older people in health care practice and program development contexts. 相似文献
285.
Following a narrative and biographic approach, in this study, we present the case of an in-service language teacher and her professional learning trajectory in the context of the project ‘Languages and education: constructing and sharing training’. This project aimed at the construction of a collaborative teacher education context for learning and transformation of experiences, views and practices in language education, and involved teachers, teacher educators and researchers. Based on a single case study, the analysis tries to disclose the teacher’s discursive displacements as hints of professional transformation while she reinterprets the learning taking place in the collaborative education process. The signs of change are visible in the way she constructs meanings regarding her professional identity, re-identifies her mission as a language teacher and reconsiders her professional identity. Finally, we reflect upon how collaborative teacher education scenarios may foster teachers’ personal professional learning and renewed self-images. 相似文献
286.
Karthiga Panneerselvam Martin E. Lynge Camilla Frich Riber Sofia Mena-Hernando Anton A. A. Smith Kenneth N. Goldie Alexander N. Zelikin Brigitte St?dler 《Biomicrofluidics》2015,9(5)
Recently, the combination of lipids and block copolymers has become an alternative to liposomes and polymersomes as nano-sized drug carriers. We synthesize novel block copolymers consisting of poly(cholesteryl acrylate) as the hydrophobic core and poly(N-isopropylacrylamide) (PNIPAAm) as the hydrophilic extensions. Their successful phospholipid-assisted assembly into vesicles is demonstrated using the evaporation-hydration method. The preserved thermo-responsive property of the lipid-polymer hybrids is shown by a temperature dependent adsorption behaviour of the vesicles to poly(l lysine) coated surfaces. As expected, the vesicle adsorption is found to be higher at elevated temperatures. The cellular uptake efficiency of hybrids is assessed using macrophages with applied shear stress. The amount of adhering macrophages is affected by the time and level of applied shear stress. Further, it is found that shorter PNIPAAm extensions lead to higher uptake of the assemblies by the macrophages with applied shear stress. No inherent cytotoxicity is observed at the tested conditions. Taken together, this first example of responsive lipid-polymer hybrids, and their positive biological evaluation makes them promising nano-sized drug carrier candidates. 相似文献
287.
Bruno Pereira de Moura João Carlos Bouzas Marins Sylvia Do Carmo Castro Franceschini Janice Sepúlveda Reis Paulo Roberto Dos Santos Amorim 《Journal of sports sciences》2015,33(6):545-551
Although exercise promotes beneficial effects in diabetic patients, some studies have questioned the degree of their importance in terms of the increase in total energy expenditure. In these studies, the decrease of physical activity levels (PAL) was referred as “compensatory effect of exercise”. However, our aim was to investigate whether aerobic exercise has compensatory effects on PAL in type 2 diabetes patients. Eight volunteers (51.1 ± 8.2 years) were enrolled in a supervised exercise programme for 8 weeks (3 d · wk?1, 50–60% of VO2 peak for 30–60 min). PAL was measured using tri-axial accelerometers in the 1st, 8th and 12th weeks. Biochemical tests, cardiorespiratory fitness, anthropometric assessment and body composition were measured in the 2nd and 11th weeks. Statistical analysis was performed using non-parametric tests (Friedman and Wilcoxon, P < 0.05). We found no significant differences in PAL between intervention periods, and participants spent the majority of their awake time in sedentary activities. However, the exercise programme generated a significant 14.8% increase in VO2 peak and a 15% reduction in fructosamine. The exercise programme had no compensatory effects on PAL in type 2 diabetes patients, but improved their cardiorespiratory fitness and glycaemic control. 相似文献
288.
Ezequiel M. Gonçalves Catarina N. Matias Diana A. Santos Luis B. Sardinha Analiza M. Silva 《Journal of sports sciences》2015,33(6):634-640
Bioelectrical impedance spectroscopy (BIS) is an inexpensive and non-invasive technique to measure total body water (TBW), extracellular water (ECW), and intracellular water (ICW). The purpose of this study was to validate TBW, ECW and ICW assessed by BIS, using dilution techniques as the reference method (REF) in elite judo athletes. Thirty-two Portuguese elite male judo athletes were evaluated during a period of weight stability. TBW, ECW and ICW were assessed by BIS (Xitron 4000). Deuterium and bromide dilution techniques were used as the criterion method for measuring TBW and ECW, while ICW was calculated as the difference between the two. BIS explained 96%, 77% and 94% of the total variability from REFs for TBW, ECW and ICW, respectively. BIS also demonstrated high precision (ρ ≥ 0.88) and accuracy (Cb = 0.98), with a minimum concordance coefficient correlation of 0.87 for ECW. The mean bias demonstrated that BIS slightly overestimated the REF in 1.1 kg (2.3%), 0.3 kg (1.6%) and 0.8 kg (2.7%) for TBW, ECW and ICW, respectively. The 95% limits of agreement ranged from ?1.2 to 3.3 kg in TBW, from ?1.8 to 2.4 kg in ECW and from ?1.0 to 2.6 kg in ICW. A non-significant trend was found between the difference and the mean of reference and alternative methods. These findings highlight the efficacy of BIS as a valid non-biased tool for the assessment of TBW and its compartments in elite male judo athletes, during a period of weight stability. 相似文献
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