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11.
Gea O. F. Parikesit Jeffrey S. Guasto Salvatore Girardo Elisa Mele Ripalta Stabile Dario Pisignano Ralph Lindken Jerry Westerweel 《Biomicrofluidics》2009,3(4)
Nanoparticle image velocimetry (nano-PIV), based on total internal reflection fluorescent microscopy, is very useful to investigate fluid flows within ∼100 nm from a surface; but so far it has only been applied to flow over smooth surfaces. Here we show that it can also be applied to flow over a topologically structured surface, provided that the surface structures can be carefully configured not to disrupt the evanescent-wave illumination. We apply nano-PIV to quantify the flow velocity distribution over a polydimethylsiloxane surface, with a periodic gratinglike structure (with 215 nm height and 2 μm period) fabricated using our customized multilevel lithography method. The measured tracer displacement data are in good agreement with the computed theoretical values. These results demonstrate new possibilities to study the interactions between fluid flow and topologically structured surfaces. 相似文献
12.
Reremoana Theodore Mele Taumoepeau Jesse Kokaua Karen Tustin Megan Gollop Nicola Taylor 《高等教育研究与发展》2018,37(1):206-221
Higher education confers significant private and social benefits. Māori and Pacific peoples are under-represented within New Zealand universities and have poorer labour market outcomes (e.g., lower wages, under-represented in skilled professions). A New Zealand tertiary education priority is to boost Māori and Pacific success in an effort to improve outcomes for these graduates, their communities and society in general. Using information collected in the Graduate Longitudinal Study New Zealand, we compared Māori and Pacific university graduate outcomes with outcomes of other New Zealand graduates. Data were collected when the participants were in their final year of study (n?=?8719) and two years post-graduation (n?=?6104). Employment outcomes were comparable between Māori, Pacific and other New Zealand graduates at two years post-graduation; however, Māori and Pacific graduates had significantly higher student debt burden and financial strain over time. They were significantly more likely to help others (e.g., family) across a range of situations (e.g., lending money), and reported higher levels of volunteerism compared to their counterparts. Boosting higher education success for Māori and Pacific students has the potential to reduce ethnic inequalities in New Zealand labour market outcomes and may result in significant private benefits for these graduates and social benefits as a result of their contribution to society. 相似文献
13.
Paul Van Mele Jonas Wanvoeke Cyriaque Akakpo Rosaline Maiga Dacko Mustapha Ceesay Louis Béavogui 《The Journal of Agricultural Education and Extension》2013,19(1):75-87
Abstract Will African farmers watch and learn from videos featuring farmers in Bangladesh? Learning videos on rice seed management were made with rural women in Bangladesh. By using a new approach, called zooming-in, zooming-out, the videos were of regional relevance and locally appropriate. When the Africa Rice Center (AfricaRice) introduced them to Africa in 2005, many scientists and civil servants thought that the videos would be culturally inappropriate and hence irrelevant to African smallholder farmers. However, African farmers who watched the videos did not experience cultural barriers. In fact, they enjoyed seeing another part of the world where farmers faced similar problems as theirs, and were able to solve these problems by themselves. To promote wider uptake of the videos a key challenge was to overcome the institutional barriers. Public sector agencies especially had to be convinced that African smallholders appreciated Asian videos. By watching the videos with farmers and listening to their feedback, the skeptical scientists and service providers changed their minds. By 2009, the Bangladeshi rice seed videos had been translated into 20 African languages and so became national products. Videos made according to the zooming-in zooming-out approach can bring farmer-to-farmer extension to a higher level of social aggregation. 相似文献
14.
The environmental education (EE) field has encountered persistent challenges in fostering the integration of EE practices in public schools, a challenge that may be addressed through integration of EE with the Next Generation Science Standards (NGSS) in the United States. In addition to the potential for fostering EE, the integration of EE and NGSS may provide a unique set of conditions for understanding how and why teachers shift their practice to incorporate more EE in their classrooms. Using a mixed methodology research design, this study examines the outcomes and processes of a professional development institute that integrated NGSS and student-driven environmental stewardship. This study provides evidence that integrating NGSS Science and Engineering Practices with stewardship may help infuse EE into classrooms. The research also contributes to theoretical understanding of the processes by which professional development shapes teacher change within an organizational context. Specifically, teacher instructional change was predicated on a shift in their beliefs that stewardship was possible in a standards and accountability-based educational context. The requisite shift in beliefs came about through the expectations and supportive resources provided by the professional development, teacher observation of student engagement, and the justification NGSS integration provided for stewardship activities. 相似文献
15.
Gianpaolo Perrella Giovanni Maria Montuori Massimiliano Fraldi Elena Mele 《浙江大学学报(A卷英文版)》2016,17(6):427-442
The efficiency of a long-span structure relies on how material is locally distributed within a fixed structural shape. In this paper a design procedure for thin plates made of three layers of a depleted material subject to a distributed vertical load is proposed. The investigation is driven by the idea of the optimal material organization and has the objective of maximizing the overall stiffness/weight ratio of the structure. Two microstructural architectures of the media are considered: a porous solid structure and a truss arrangement. For each type of microstructure the flexural stiffness has been correlated to the level of depletion by the use of a power law function by setting very few parameters. Finally, invoking the principles of structural homogenization theory, the global flexural response of the plate has also been calculated. The validity of the method is demonstrated by comparing the analytical results with those obtained by a numerical finite element simulation of the structure based on a detailed model of the media. 相似文献
16.
Reremoana Theodore Karen Tustin Cynthia Kiro Megan Gollop Mele Taumoepeau Nicola Taylor 《高等教育研究与发展》2016,35(3):604-618
Māori, the indigenous population of New Zealand, are gaining university qualifications in greater numbers. This article describes the history of Māori university graduates, their current situation and the implications for indigenous futures. Section one provides a brief overview of historical policies and practices that, similar to those used on other indigenous populations, resulted in the widespread exclusion of Māori from university education until the 1970s and 1980s. Section two describes findings for Māori university graduates (n?=?626) from the Graduate Longitudinal Study New Zealand (GLSNZ). Results show that nearly half (48.4%) were the first member of their immediate family to attend university. Humanities/education (50.8%) was the most common domain of study followed by commerce (17.7%), science/engineering (15.4%), health sciences (10.9%), law (2.8%) and PhD study (2.4%). More Māori graduates were females (71%). One-third of graduates were parents, and being a parent was associated with a lower likelihood of studying science and engineering compared to those participants without children. The most common areas/fields that participants wished to work in post-graduation were education and training (28.3%), health care and medical (17.4%) and government (11.8%). Despite increases in higher education participation and completion, parity remains an issue. Similar to previous indigenous research findings, Māori are under-represented as graduates (7.1% of the total sample) and in particular as postgraduates (5.8%) considering that Māori constitute 14.9% of the New Zealand population. Contemporary indigenous graduates are critical for indigenous development. Over the next 10 years, the GLSNZ will follow graduates and provide insights into Māori graduate outcomes. 相似文献
17.
Mother and infant talk about mental states relates to desire language and emotion understanding 总被引：3，自引：0，他引：3
This study assessed the relation between mother mental state language and child desire language and emotion understanding in 15-24-month-olds. At both time points, mothers described pictures to their infants and mother talk was coded for mental and nonmental state language. Children were administered 2 emotion understanding tasks and their mental and nonmental state vocabulary levels were obtained via parental report. The results demonstrated that mother use of desire language with 15-month-old children uniquely predicted a child's later mental state language and emotion task performance, even after accounting for potentially confounding variables. In addition, mothers' tendency to refer to the child's over others' desires was the more consistent correlate of mental state language and emotion understanding. 相似文献