Tuning bubbly structures in microchannels     

Vuong SM  Anna SL 《Biomicrofluidics》2012,6(2):22004-2200418

Foams have many useful applications that arise from the structure and size distribution of the bubbles within them. Microfluidics allows for the rapid formation of uniform bubbles, where bubble size and volume fraction are functions of the input gas pressure, liquid flow rate, and device geometry. After formation, the microchannel confines the bubbles and determines the resulting foam structure. Bubbly structures can vary from a single row ("dripping"), to multiple rows ("alternating"), to densely packed bubbles ("bamboo" and dry foams). We show that each configuration arises in a distinct region of the operating space defined by bubble volume and volume fraction. We describe the boundaries between these regions using geometric arguments and show that the boundaries are functions of the channel aspect ratio. We compare these geometric arguments with foam structures observed in experiments using flow-focusing, T-junction, and co-flow designs to generate stable nitrogen bubbles in aqueous surfactant solution and stable droplets in oil containing dissolved surfactant. The outcome of this work is a set of design parameters that can be used to achieve desired foam structures as a function of device geometry and experimental control parameters.  相似文献   

Problem Solving Academic Workloads Management: A University Response1     

Shelley R. Paewai  Luanna H. Meyer  Don J. Houston 《Higher Education Quarterly》2007,61(3):375-390

Universities are challenged to maintain a work environment where academic staff fulfil traditional academic duties while responding to a diverse student population, a competitive research environment, and an escalation of administrative tasks within an accountability‐based climate. This paper analyses the development and implementation of a workloads policy at a New Zealand university through a joint university management and staff union initiative. The workloads policy was built on the principles of equity, transparency, reasonableness, safety and acceptability to staff. The integrity and effectiveness of adoption is evaluated through analyses of work requirements, workloads models and the findings from case studies of implementation by six diverse units from across the university. Based on our evaluation, we highlight aspects of the policy and procedures that have promise and suggest modifications where particular processes and outcomes fell short of stated goals for institutional change.  相似文献   

Discover: Helping teachers to discover the pleasure of learning and teaching     

Claudio Dondi  Michela Moretti 《British journal of educational technology : journal of the Council for Educational Technology》2007,38(3):519-522

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Faculty Perceptions of ACRL's Information Literacy Competency Standards for Higher Education     

Shelley Gullikson   《The Journal of Academic Librarianship》2006,32(6):583-592

Faculty were asked how important for their students the Association of College and Research Libraries' Information Literacy Competency Standards'outcomes are, and when students should display the relevant skills. Faculty believe most of the Standards' outcomes are important but show little agreement on when students should acquire them.  相似文献   

Research Managers Uncovered: Changing Roles and 'Shifting Arenas' in the Academy     

Louise Shelley 《Higher Education Quarterly》2010,64(1):41-64

This paper draws on findings from a study that explored the changing roles and career experience of research managers and research administrators in English universities. It explores how research support has evolved during a period when the higher education sector was responding to changing science and higher education policy. These changes have impacted on research managers and research administrators roles, altered the occupational group and moved field boundaries. The paper draws on Bourdieu's theory of social practice to understand these changes and identifies a shared space of tension, the 'shifting arena,' where the research manager field crosses into the academic field. It is suggested that an increased understanding of this space will enhance the collaborative working of all those involved in research and help maximise research activity.  相似文献   

Teaching to be American: the quest for integrating the Italian-American child     

Erica Moretti 《History of education》2015,44(5):651-666

In the early years of the twentieth century, the great structural, social and cultural changes in American society included a growing number of immigrants arriving from the poorest regions of Europe. For the first time, the issues of immigration, assimilation and social integration became the most important problems facing American society. In the optimistic climate of the so-called progressive era, social reformers thought that these problems could be solved by the science of pedagogy, as applied to the educational needs of foreign immigrants. This essay centres on the pedagogical efforts of Italian-American educator Angelo Patri, who attempted to integrate Italian-American children into the fabric of American society through education. It starts by assessing Patri’s early writings, such as A Schoolmaster of the Great City, and his private and professional papers. In doing so, his work is situated in the debate on progressive education alongside pedagogue Maria Montessori, demonstrating his central role in the debate on integration through education. Within this analysis, particular attention is paid to the notion of learning by doing, and it is argued that both educators were influenced by this particular aspect of progressive education.  相似文献   

The Role of Digital Technologies in Numeracy Teaching and Learning     

Vince Geiger  Merrilyn Goos  Shelley Dole 《International Journal of Science and Mathematics Education》2015,13(5):1115-1137

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Hunting and gathering: new imperatives in mapping and collecting student learning data to assure quality outcomes     

Romy Lawson  Tracy Taylor  Erica French  Eveline Fallshaw  Cathy Hall  Shelley Kinash 《高等教育研究与发展》2015,34(3):581-595

Assurance of learning (AOL) is a quality enhancement and quality assurance process used in higher education. It involves a process of determining programme learning outcomes and standards, and systematically gathering evidence to measure students' performance on these. The systematic assessment of whole-of-programme outcomes provides a basis for curriculum development and management, continuous improvement, and accreditation. To better understand how AOL processes operate, a national study of university practices across one discipline area, business and management, was undertaken. To solicit data on AOL practice, interviews were undertaken with a sample of business school representatives (n?=?25). Two key processes emerged: (1) mapping of graduate attributes and (2) collection of assurance data. External drivers such as professional accreditation and government legislation were the primary reasons for undertaking AOL outcomes but intrinsic motivators in relation to continuous improvement were also evident. The facilitation of academic commitment was achieved through an embedded approach to AOL by the majority of universities in the study. A sustainable and inclusive process of AOL was seen to support wider stakeholder engagement in the development of higher education learning outcomes.  相似文献   

Differential risk for developmental reading disorders in the offspring of compensated versus noncompensated parents     

Jeffrey W. Gilger  Elizabeth Hanebuth  Shelley D. Smith  Bruce F. Pennington 《Reading and writing》1996,8(5):407-417

When one or both parents have a history of developmental reading disorder (RD) in childhood, the risk to their offspring for developing reading problems is substantially increased. However, risk research has usually assumed a stability of reading problems across the lifespan (i.e., if a parent was affected in childhood, he or she remains affected in adulthood). Yet, some individuals with RD in childhood compensate for the disorder as they grow older. Both an environmental and genetic hypothesis would predict that the risk for RD in offspring will vary as a function of parental compensation. This study examined whether risk to offspring was dependent on the parents' successful or unsuccessful compensation for their childhood reading problems. Two large family data sets were analyzed (N=907). Diagnoses with either an age discrepant or IQ discrepant criteria essentially showed that having at least one still affected parent (i.e., RD both as a child and as an adult) put the offspring at a higher risk for RD than having at least one compensated parent (i.e., RD as a child but not as an adult). The lowest risk to an offspring occurred when both parents were never affected (i.e., not RD as a child or as an adult). The implications of these findings are discussed with regard to counseling and early diagnosis of reading problems.  相似文献   

The fluid infusion of musical culture: embodied experiences in a grade one classroom     

Shelley M. Griffin 《Pedagogies: An International Journal》2017,12(1):21-40

ABSTRACT

Children’s daily, embodied music experiences are integral to how children live and function in the world. Growing out of a line of work focusing on the interplay between elementary children’s daily experiences of music, both in- and out-of-school and the impact on elementary music education curriculum, this research is nested within the theoretical discourses of experience, children’s musical culture, and children’s agency. Building upon this work, findings from a two-phase, 6-month inquiry, situated in an urban, Canadian, Grade 1 French Immersion classroom, draw upon the tools of ethnography and narrative inquiry, with the intention of deepening understandings of how informal music-making and sound function in children’s lives. Phase one findings highlight: (1) the frequency and spontaneity of children’s daily music experiences, both in- and out-of-school, (2) the nature of how music and sound function fluidly in a variety of contexts as integral to children’s experience, and (3) the power of musical behaviours in assisting young children to acquire French vocabulary and literacy skills. Important considerations for teacher education include: the necessity of creating space in elementary curriculum to engage children in music-making, integrating and infusing the Arts fluidly across the curriculum, and encouraging children autonomy in their musical engagement.  相似文献