Are there constraints on learned responses to odors from rewarded and nonrewarded rats?

This study determined if test rats could utilize biological odors, generated from donor rats receiving reward (R) and frustrative nonreward (N) treatments, to predict reward and nonreward goal events equally well. In Phase 1, two groups of test rats were exposed to R and N odors that signaled, respectively, either R and N goal events (“same” condition) or N and R goal events (“opposite” condition). Rats demonstrated significant discriminative use of these odors under both conditions. Subjects in the “opposite” condition, however, were slightly slower to learn the discrimination. Reversal learning was readily accomplished in Phase 2, regardless of the same-opposite factor. Thus, little evidence for a constraint on learning was found, and an interpretation in terms of interfering response tendencies and their habituation seemed favored.     

Primary teachers’ understanding of the interactive whiteboard as a tool for children’s collaborative learning and knowledge‐building

This paper reports on the second phase of a joint teacher/researcher project that explored teachers’ understandings of the potential of the interactive whiteboard (IWB) as a tool for primary school children’s collaborative group work. By examining teachers’ written analyses and discussions of work carried out in their own classrooms, the paper seeks to contribute to the debate about the ways in which the use of IWBs can contribute to changes in pedagogy. It highlights the interrelationships between collaborative learning and factors identified as important in the research carried out by teachers, amongst them the children’s technical skills and confidence, the mediating role of the teacher, the IWB affordances for knowledge‐building and the teachers’ own knowledge, attitudes and professional development. The paper also provides an account of how participation by the teachers in a course with Faculty staff, focused on the collaborative co‐construction of knowledge related to learning and to classroom research grounded in the values and principles of socio‐cultural theory, supported changes in pedagogic practice.     

Website usage metrics: A re-assessment of session data

Metrics derived from user visits or sessions provide a means of evaluating Websites and an important insight into online information seeking behaviour, the most important of them being the duration of sessions and the number of pages viewed in a session, a possible busyness indicator. However, the identification of session (termed often ‘sessionization’) is fraught with difficulty in that there is no way of determining from a transactional log file that a user has ended their session. No one logs out. Instead a session delimiter has to be applied and this is typically done on the basis of a standard period of inactivity. To date researchers have discussed the issue of a time out delimiter in terms of a single value and if a page view time exceeds the cut-off value the session is deemed to have ended. This approach assumes that page view time is a single distribution and that the cut-off value is one point on that distribution. The authors however argue that page time distribution is composed of a number of quite separate view time distributions because of the marked differences in view times between pages (abstract, contents page, full text). This implies that a number of timeout delimiters should be applied. Employing data from a study of the OhioLINK digital journal library, the authors demonstrate how the setting of a time out delimiter impacts on the estimate of page view time and the number of estimated session. Furthermore, they also show how a number of timeout delimiters might apply and they argue that this gives a better and more robust estimate of the number of sessions, session time and page view time compared to an application of a single timeout delimiter.     

“Frayed All Over:” The Causes and Consequences of Activist Burnout Among Social Justice Education Activists

Despite the growing body of scholarship on burnout among social justice activists who are working on a variety of issues, from labor rights to queer justice, little attention has been paid to burnout among those whose activism focuses on issues of educational justice. To begin to address this omission and understand what supports might help social justice education activists mitigate burnout and sustain their activism, we analyzed interview data from 14 activists focused on activist burnout and its implications on movements for educational justice.. This analysis identified 3 major symptom categories of activist burnout and we gained insights into the culture of martyrdom in social justice education movements. These symptoms and the culture of martyrdom, by negatively impacting the health and sustainability of activists, threaten the efficiency and effectiveness of educational justice movements.     

African Americans in Urban Catholic Schools: Faith, Leadership and Persistence in Pursuit of Educational Opportunity

A review of research on US Catholic education reveals that race is not treated as an important area of analysis like class and gender. Black Catholics are rarely studied in education let alone mainstream writings. This article examines the social and educational history of blacks in the US Catholic Church and the dual reality of inclusion and exclusion within a Church and its schools. This paper focuses on the intersection of the Church and Black Catholic schools as enduring institutions of opportunity for Black families and their communities. This paper unearths the shared values, assumptions and beliefs about African American Catholics quest for literacy. The article uses Black Theology as a frame to explain how the intersections of culture, history and religion influence meaning and educational decision-making. African Americans pursued Catholic education for two reasons. First, they sought to be educated which both advanced their individual freedom but vastly improved their community’s economic, social, and political standing. Second, they inserted their own unique cultural and social experiences into Catholic schools which espoused service and academic excellence. Black Catholic schools well-defined values and academic excellence is still viewed by African Americans as places of hope and opportunity for students of color.     

Cross‐survey analysis of school violence and disorder

School psychologists and administrators are often asked to respond to student violence and disorder based on incomplete or inaccurate information about the nature and scope of these problems in their schools. Records of disciplinary actions and incidents may reflect only the tip of the proverbial iceberg. In national surveys, school administrators report rates of violence and disorder that are only a small fraction of the rates reported by students in national self‐report surveys. Student self‐report surveys on school violence and disorder may offer school officials a means of more accurately appraising the prevention needs of their students. This article compares the methods and findings of three national surveys of students in an effort to understand what methodological characteristics have the most salient impact on their findings. The article examines measures of school‐related weapon carrying and fear from all three national surveys contrasting their modes of administration and question phrasing. Estimates from even the most expertly designed and administered survey will include some error. However, the stability and comparability of the national surveys across time and across surveys suggest that student self‐report surveys are valuable tools for school‐level needs assessment. © 2001 John Wiley & Sons, Inc.     

The information seeking behaviour of the users of digital scholarly journals

The article employs deep log analysis (DLA) techniques, a more sophisticated form of transaction log analysis, to demonstrate what usage data can disclose about information seeking behaviour of virtual scholars – academics, and researchers. DLA works with the raw server log data, not the processed, pre-defined and selective data provided by journal publishers. It can generate types of analysis that are not generally available via proprietary web logging software because the software filters out relevant data and makes unhelpful assumptions about the meaning of the data. DLA also enables usage data to be associated with search/navigational and/or user demographic data, hence the name ‘deep’. In this connection the usage of two digital journal libraries, those of EmeraldInsight, and Blackwell Synergy are investigated. The information seeking behaviour of nearly three million users is analyzed in respect to the extent to which they penetrate the site, the number of visits made, as well as the type of items and content they view. The users are broken down by occupation, place of work, type of subscriber (“Big Deal”, non-subscriber, etc.), geographical location, type of university (old and new), referrer link used, and number of items viewed in a session.     

Dielectrophoretic differentiation of mouse ovarian surface epithelial cells, macrophages, and fibroblasts using contactless dielectrophoresis

Ovarian cancer is the leading cause of death from gynecological malignancies in women. The primary challenge is the detection of the cancer at an early stage, since this drastically increases the survival rate. In this study we investigated the dielectrophoretic responses of progressive stages of mouse ovarian surface epithelial (MOSE) cells, as well as mouse fibroblast and macrophage cell lines, utilizing contactless dielectrophoresis (cDEP). cDEP is a relatively new cell manipulation technique that has addressed some of the challenges of conventional dielectrophoretic methods. To evaluate our microfluidic device performance, we computationally studied the effects of altering various geometrical parameters, such as the size and arrangement of insulating structures, on dielectrophoretic and drag forces. We found that the trapping voltage of MOSE cells increases as the cells progress from a non-tumorigenic, benign cell to a tumorigenic, malignant phenotype. Additionally, all MOSE cells display unique behavior compared to fibroblasts and macrophages, representing normal and inflammatory cells found in the peritoneal fluid. Based on these findings, we predict that cDEP can be utilized for isolation of ovarian cancer cells from peritoneal fluid as an early cancer detection tool.