AbstractLittle analytical scrutiny has been devoted to teacher accommodation of academic language at the early childhood level, despite being a critical school-level factor to consider when addressing at-risk learners’ academic needs. The present study investigates how fifteen Head Start teachers support three components of academic language during whole-class read-alouds of narrative storybooks: academic vocabulary, conceptual knowledge, and complex syntax. Pairing a corpus-based analysis of linguistic features and content analyses of teachers’ extratextual utterances, we describe teachers’ strategies for accommodating at-risk children’s early experiences with linguistically and syntactically complex texts. Our findings indicate that teachers simplified the language of the texts to accommodate student need, while also providing examples of academic talk through defining terms and providing conceptually-rich talk. Although teachers provided rich support for academic vocabulary, less accommodation was made for complex syntax. Practical and theoretical implications are addressed. 相似文献
We utilize a recently developed microfluidic device, the Optimized Shape Cross-slot Extensional Rheometer (OSCER), to study the elongational flow behavior and rheological properties of hyaluronic acid (HA) solutions representative of the synovial fluid (SF) found in the knee joint. The OSCER geometry is a stagnation point device that imposes a planar extensional flow with a homogenous extension rate over a significant length of the inlet and outlet channel axes. Due to the compressive nature of the flow generated along the inlet channels, and the planar elongational flow along the outlet channels, the flow field in the OSCER device can also be considered as representative of the flow field that arises between compressing articular cartilage layers of the knee joints during running or jumping movements. Full-field birefringence microscopy measurements demonstrate a high degree of localized macromolecular orientation along streamlines passing close to the stagnation point of the OSCER device, while micro-particle image velocimetry is used to quantify the flow kinematics. The stress-optical rule is used to assess the local extensional viscosity in the elongating fluid elements as a function of the measured deformation rate. The large limiting values of the dimensionless Trouton ratio, Tr ∼ O(50), demonstrate that these fluids are highly extensional-thickening, providing a clear mechanism for the load-dampening properties of SF. The results also indicate the potential for utilizing the OSCER in screening of physiological SF samples, which will lead to improved understanding of, and therapies for, disease progression in arthritis sufferers. 相似文献
AbstractThe aim was to analyse the physical growth and body composition of rhythmic gymnastics athletes relative to their level of somatic maturation. This was a cross-sectional study of 136 athletes on 23 teams from Brazil. Mass, standing height and sitting height were measured. Fat-free and fat masses, body fat percentages and ages of the predicted peak height velocity (PHV) were calculated. The z scores for mass were negative during all ages according to both WHO and Brazilian references, and that for standing height were also negative for all ages according to WHO reference but only until 12 years old according to Brazilian reference. The mean age of the predicted PHV was 12.1 years. The mean mass, standing and sitting heights, body fat percentage, fat-free mass and fat mass increased significantly until 4 to 5 years after the age of the PHV. Menarche was reached in only 26% of these athletes and mean age was 13.2 years. The mass was below the national reference standards, and the standing height was below only for the international reference, but they also had late recovery of mass and standing height during puberty. In conclusion, these athletes had a potential to gain mass and standing height several years after PHV, indicating late maturation. 相似文献
Home-based therapy has become an ongoing trend within the mental health field. This transcendental phenomenologically designed study explored the lived experiences of clinical mental health counseling internship students (N=8) who provided home-based therapy as their primary method of gaining required clinical experience for the completion of their master’s degree. The overall personal and professional development of the students providing therapy in this setting was explored. Insights of the internship students regarding their experiences and challenges in providing home-based therapy were revealed. Recommendations based on the experiences of the students providing home-based therapy were offered. Implications to students, counselor educators, and supervisors have also been provided.
The article is a partial result of a wider research project, in which the commodification of science is interpreted, from one point of view, as a facet of the rise of neoliberalism, and from another, as a set of processes, classified according to a three-category taxonomy. Only one of the taxonomy’s categories is dealt with in this article, the one that concerns the processes that affect the programme of scientific research. First a sketch is presented of the historical background and the periodization of the most relevant epoch for the study of the commodification of science, namely, the one from the end of World War II to the present. The periodization is expressed in the notions of Golden Years science and neoliberal science. The ensuing sections have the aims: to show that, in Golden Years science, the processes shaping research programmes did not include commodification; to characterize the period of transition of the 70 s; to describe the processes of commodification that have impact on the research programmes of neoliberal science; to discuss criticisms that have been levelled against them, as well as proposals for better ways of conducting scientific practices, and their implications for science education (which are of the same nature as that of Science & Education’s editorial line); and finally, to bring to light the differences between developed and emerging countries as far as the commodification of science is concerned. 相似文献
This paper compares the No Blame approach to bullying with the ecosystemic approach to changing problem behaviour. It suggests that there are several similarities between the two approaches: they are both applicable in particular kinds of situation; their success depends to a great extent on the people using the technique, in particular the degree to which they can bring the quality of genuineness to the situation; they are not directly concerned with punishment, truth or control; and they challenge the assumptions teachers make about children's problem behaviour. A key point is the need for teachers to recognize that bullying is a natural event (in so far that it is a regular one) and the need to suspend their own feelings of anger and repugnance. As the writer points out, ‘a process which fails to engage the bully and makes no attempt to enhance feelings of concern and understanding is unlikely to bring about any fundamental change in behaviour’. Though written at a fairly theoretical level, what the writer says has direct relevance to practice in schools. 相似文献
Quality in higher education is a subject of increasing importance. This idea can be supported by looking at different sources, namely, the scientific literature, national and transnational governments’ policies, such as those emerging from the Bologna Process. Also, the internationalisation of higher education and, within it, students’ and staff mobility among institutions, has brought to the agenda the quality issue, particularly with regard to the teaching and learning process. Several authors argue that the meaning of quality depends on who defines it. This article focuses on a study that looks at how teachers and students in higher education institutions, in Portugal and in the domain of Engineering, see the quality issue. Data was collected through interviews to teachers (six) and students (38) in two different Portuguese institutions. The results indicate that, although teachers and students refer to the same dimensions that influence quality, they have different perspectives about their importance. From the point of view of the authors, this discrepancy requires some pedagogical actions in the context where the study was developed and, also, further research to see if the same tendency exists in different settings. 相似文献
The present study investigated the effects of different intensities of resistance training (RT) on elbow flexion and leg press one-repetition maximum (1RM) and muscle cross-sectional area (CSA). Thirty men volunteered to participate in an RT programme, performed twice a week for 12 weeks. The study employed a within-subject design, in which one leg and arm trained at 20% 1RM (G20) and the contralateral limb was randomly assigned to one of the three conditions: 40% (G40); 60% (G60), and 80% 1RM (G80). The G20 started RT session with three sets to failure. After G20 training, the number of sets was adjusted for the other contralateral limb conditions with volume-matched. CSA and 1RM were assessed at pre, post-6 weeks, and post-12 weeks. There was time effect for CSA for the vastus lateralis (VL) (8.9%, 20.5%, 20.4%, and 19.5%) and elbow flexors (EF) (11.4%, 25.3%, 25.1%, and 25%) in G20, G40, G60, and G80, respectively (p?>?.05). G80 showed higher CSA than G20 for VL (19.5% vs. 8.9%) and EF (25% vs. 11.4%) at post-12 weeks (p?.05). There was time effect for elbow flexion and unilateral leg press strength for all groups post-12 weeks (p?.05). However, the magnitude of increase was higher in G60 and G80. In conclusion, when low to high intensities of RT are performed with volume-matched, all intensities were effective for increasing muscle strength and size; however, 20% 1RM was suboptimal in this regard, and only the heavier RT intensity (80% 1RM) was shown superior for increasing strength and CSA compared to low intensities. 相似文献