Microfluidic blood plasma separation via bulk electrohydrodynamic flows

An effective mechanism for rapid and efficient microfluidic particle trapping and concentration is proposed without requiring any mechanically moving parts. When a voltage beyond the threshold atmospheric ionization value is applied on a sharp electrode tip mounted at an angle above a microfluidic liquid chamber, the bulk electrohydrodynamic air thrust that is generated results in interfacial shear and, hence, primary azimuthal liquid surface recirculation. This discharge driven vortex mechanism, in turn, causes a secondary bulk meridional liquid recirculation, which produces an inward radial force near the bottom of the chamber. Particles suspended in the liquid are then rapidly convected by the bulk recirculation toward the bottom, where the inward radial force causes them to spiral in a helical swirl-like fashion toward a stagnation point. In particular, we show that these flows, similar to Batchelor flows occurring in a cylindrical liquid column between a stationary and rotating disk, can be used for the separation of red blood cells from blood plasma in a miniaturized device.     

A content analysis of school anti‐bullying policies: progress and limitations

Schools in England are legally required to have an anti‐bullying policy, but the little research so far suggests that they may lack coverage in important areas. An analysis of 142 school anti‐bullying policies, from 115 primary schools and 27 secondary schools in one county was undertaken. A 31‐item scoring scheme was devised to assess policy. Overall, schools had about 40% of the items in their policies. Most included improving school climate, a definition of bullying including reference to physical, verbal and relational forms, and a statement regarding contact with parents when bullying incidents occurred. But many schools did not mention other important aspects, and there was low coverage of responsibilities beyond those of teaching staff; following up of incidents; management and use of records; and specific preventative measures such as playground work and peer support. There was infrequent mention of homophobic bullying, and of cyberbullying. There was little difference between policies from primary and secondary schools. Findings are discussed in terms of national policy, and ways to support schools in maximising the potential of their policies for reducing bullying.     

Pedagogical renewal: Improving the quality of classroom interaction in Nigerian primary schools

This study reports on an investigation of classroom interaction and discourse practices in Nigerian primary schools. Its purpose was to identify key issues affecting patterns of teacher–pupil interaction and discourse as research suggests managing the quality of classroom interaction will play a central role in improving the quality of teaching and learning, particularly in contexts where learning resources and teacher training are limited. The study was based on the interaction and discourse analysis of video recordings of 42 lessons and 59 teacher questionnaires from 10 States, drawn mainly from the north of Nigeria. The findings revealed the prevalence of teacher explanation, recitation and rote in the classroom discourse with little attention being paid to securing pupil understanding. The wider implications of the findings for improving the quality of classroom interaction in Nigerian primary schools through more effective school-based training are considered.     

Revitalizing an Existing Honor Code Program

This article addresses academic integrity initiatives at a large research university. The article explains the rationale for the creation of the honor system office and its evolution to date. Data collected from academic violation cases during the program’s first two years are included. Pauline Melgoza is Assistant Professor and Physical Sciences Librarian at Texas A&M University. She received her B.S. and her M.S. from Texas A&M University and her MLIS from the University of North Texas. She was a member of the Academic Integrity Team and served two years on the Honor Council of the Aggie Honor System Office. Jane Smith is Assistant Professor and Education Reference Librarian at Texas A&M University. She received her B.S. from the University of Texas at Austin and her MLIS from Texas Woman’s University. Interests include information literacy, bibliographic instruction and faculty outreach.     

What remains of history? Historical epistemology and historical understanding in Scotland's Curriculum for Excellence

This paper critically examines the framing of historical knowledge in the primary and ‘broad general education’ phases (ages 4–14) of Scotland's Curriculum for Excellence. The paper focuses on curriculum documentation, particularly the curriculum's aims and ‘Experiences and Outcomes’ and evaluates these in light of recent research on children's historical understanding. It is argued that the decision to frame historical understanding as ‘People, Past Events and Societies’ within the context of a ‘social studies’ curriculum area has been motivated by a misunderstanding of history's unique disciplinary identity. It is argued that history curricula must take account of the unique ontological and epistemological challenges posed by investigating the past and that by failing to do this, ‘Curriculum for Excellence’ offers children in Scotland a problematic representation of what it means to study the past. The paper challenges the curriculum in both epistemic and pedagogical terms, before suggesting that a rigorous study of history as a discipline can make a valuable contribution to children's personal and social development.     

The college student grant study: The effectiveness of student grant and scholarship programs in promoting equal educational opportunity

During the last few years there has been an increased emphasis on the use of student scholarships and grants to promote postsecondary access and choice. This study of scholarship and grant programs in California, New Jersey, New York, and Pennsylvania examines the extent to which this goal is being achieved. Highlights of the findings are that these state aid programs (1) induce a substantial number of students from low-income families to attend college, although they fail to have much impact on the very lowest income students; (2) are particularly helpful to women; and (3) overall, are responsible for the postsecondary attendance of nearly one half of the aid recipients.     

Unpacking Participatory Research in Education

The authors of this paper are members of Ottawa Participatory Researchers in Education (OPRE) a group of teachers, university academics, and students attempting to develop research initiatives using democratic and collaborative research approaches. Building on the experiences of the group, the paper examines and problematizes three elements typically ascribed to non-traditional research approaches: a social action focus, a transformative objective, and a participatory process. Particular emphasis is placed on the questions of who participates, in what ways, and under what conditions. As a result of OPRE's experience and self reflection, seven traps of "pseudo-democracy" are identified and illustrated as potential problems in research purporting to embody equal collaboration between university based academics and community members, such as teachers and students. It is argued that in order to further a democratic research process, equality of opportunity to participate cannot be assumed at any stage of the research process. Attention is paid to the following stages: setting the research agenda, the research epistemology, chronology of the project, representativeness of project participants, funding processes, knowledge cultures, and dissemination choices. Conclusions call for raising awareness of the possibility of teachers and students collaborating to identify research issues of mutual concern and developing a controlling role in research where academics are included as consultants and equals, but not as the possessors of superior and controlling research expertise.     

Teachers ’ conversations about civic education: Policy and practice in Australian schools

Civic education has been a priority for many countries in the Asia Pacific region over the past decade. Governments of different persuasions have recognized the need to provide stability and cohesion in their societies. This has been particularly so at a time when globalization and other forces threaten to fragment the nation state and co-opt its citizens into broader realms of allegiance and commitment. Policy makers have not been slow to come up with new directions for civic education in the school curriculum and the literature now abounds with examples from different countries. Yet missing from this flurry of policy development has been recognition of the role that teachers play in constructing civic education programs at the school level. In the end, it is teachers in classrooms who determine how centralized polices are understood and implemented. Drawing on a sample of Australian teachers, the purpose of this paper is to highlight the role that teachers play in constructing and reconstructing civic education policy in schools and classrooms. Interviews conducted with teachers in four Australian States/Territories have revealed that teachers ’ personal views of civics are more likely to influence them than external policies, their focus is more on citizenship than formal civics programs and that they are reluctant to develop programs where civic knowledge is formalized and disciplined based. The research reported in this paper was funded by the Australian Research Council (ARC). The views expressed are those of the authors and not the ARC.     

Trapped between justified anger and being the strong Black woman: Black college women coping with racial battle fatigue at historically and predominantly White institutions

Using the unique form of a composite counterstory culled from the experiences of 13 Black women at historically and predominantly White colleges and universities in a Western U.S. state, this paper explores the psychological tensions and silencing Black college women face as they navigate social constructions of their selfhood under a White gaze. This study centers these Black women’s voices through a tradition of storytelling and examines the ways they try to carve their own place by often engaging liberating, yet repressive, historically constructed STRONGBLACKWOMAN imagery to counteract equally silencing Angry Black Woman imagery. The historically and predominantly White institutional spaces within which these women study, live, and play exacerbate this tension, propelling them to model and rely upon stereotypically ‘positive’ representations of Black womanhood to deal with the pain of microaggressions. Altogether, these factors create instances of enhanced racial battle fatigue.