Guest Editorial

This special issue, Volume 14, Issue 2, features both new essays and reprints of pieces from past issues that are relevant to the theme of preparing teacher candidates to work effectively with families and communities. It offers each of us the opportunity to re-imagine the way we prepare our pre-service candidates for the challenges of today’s classrooms

Logic controlled solid state switchgear

Logic controlled solid state circuit breakers and power transfer switches have been designed and built to demonstrate their use for 270 V dc power systems. This switchgear provides remote operation, automatic current level, and operates several orders of magnitude faster with much greater accuracy of response than conventional switchgear

The Poor and Marginalized Among Us: Contingent Faculty in Jesuit Universities

Faculty of institutions of higher learning have an opportunity to discuss, debate,and discern how to create workplaces that are just and inclusive.As members of Jesuit institutions, wehave a moral obligation to do so. How, then, can Jesuit universities justify the poor treatment of contingent faculty, who are now a majority not just in our institutions but in the country as a whole? Tenure-track employment is a fading tradition in universities throughout the United States. The data also show that non-tenure-track faculty, particularly the growing number of part-time adjunct faculty, constitute a population of marginalized, often poor,employees working alongside more privileged colleagues. Furthermore, the data show that the burden of inequality falls more heavily on women and people of color. How do Jesuit values and the mission statements of Jesuit universities guide us in this situation? How do Catholic social teaching principles help us to see and articulate the current situation more clearly, and find a path to more just and equitable employment in Jesuit higher education

A computer simulation of Skylab dynamics and attitude control for performance verification and operational support

A simulation of the Skylab attitude and pointing control system (APCS) is outlined and discussed. Implementation is via a large hybrid computer and includes those factors affecting system momentum management, propellant consumption, and overall vehicle performance. The important features of the flight system are discussed; the mathematical models necessary for this treatment are outlined; and the decisions involved in implementation are discussed. A brief summary of the goals and capabilities of this tool is also included

Take Me Out: Space and Place in Library Interactions

Information interactions are strongly affected by the place where they occur. Specific locations are ofen associated with searches on particular topics, and individual users perform different tasks in habituated places. A classic example of habituated space is the commuter who regularly reads the news on the train. This paper investigates these associations through four user studies that examine different uses of place in information interaction. Through this, we reveal the ways in which the location of information interactions makes them effective or ineffective. This extends our interpretation of the role of place in information interaction beyond established foci such as location-based search

Integrating Domains: My Work as a Christian Teacher Educator

This essay on one teacher educator’s integration of faith, learning, and scholarship articulates the author’s exploration into what it means to be a Christian teacher educator who seeks to integrate the cognitive and the spiritual domains at a small private Christian university. Drawing from both educational and spiritual literature, the essay examines both the ideals and applications of one who seeks to be a teacher educator who is informed by the life and teachings of Jesus

A Visit to The Kilns: A Formative Experience for Two Christian Teacher Educators

The C.S. Lewis Study Centre at the Kilns is located near Oxford, England in the previous home of C.S. Lewis, the highly influential 20th century Christian intellectual and apologist. Two professors, who coupled a brief stay at the Kilns with an inquiry into the life of Lewis and his writings, present insights into their work as teacher educators. Three main areas are explored. The first area is the nature of our work, including a discussion of the distinct roles associated with Christian teacher educators and the importance of professional community. Next is a discussion on the quality of our work, including insights into the themes of excellence and authentic learning. The third area is what we bring to our work and includes a consideration of integrity and faithfulness. The essay closes with insights from Lewis’ concept of a supposal

Dynamics of coupled vortices in layered magnetic nanodots

The spin dynamics are calculated for a model system consisting of magnetically soft, layered nanomagnets, in which two ferromagnetic (F) cylindrical dots, each with a magnetic vortex ground state, are separated by a non-magnetic spacer (N). This permits a study of the effects of interlayer magnetostatic interactions on the vortex dynamics. The system was explored by applying the equations of motion for the vortex core positions. The restoring force was calculated taking into account the magnetostatic interactions assuming a realistic surface charge free spin distribution. For tri-layer F/N/F dots with opposite chiralities and the same core polarizations (lowest energy state), two eigenmodes are predicted analytically and confirmed via micromagnetic simulations. One mode is in the sub-GHz range for submicron dot diameters and corresponds to quasi-circular rotation of the cores about the dot center. A second mode is in the MHz range corresponding to a small amplitude rotation of the mean core position. The eigenfrequencies depend strongly on the geometrical parameters of the system, suggesting that magnetostatic effects play a dominant role in determining the vortex dynamics.Comment: One PDF file including text and 4 figure

Getting creative in everyday life: Investigating arts and crafts hobbyists' information behavior

While there has been increasing interest in how creative professionals find information to drive creative outputs, previous information behavior research has largely ignored how arts and crafts hobbyists look for information sources in their everyday lives. To fill this literature gap, we conducted interviews and observations with arts and crafts hobbyists to find out how they conceive potential DIY projects. The findings highlight three themes: the dearth of human sources, the prevalence of domain-specific information, and the use of self-curated information. In addition to empirical results, this work also broadens the understanding of information behavior in an arts and crafts context by studying populations beyond professional artists

Evolutionary Divergence in Developmental Strategies and Neuromodulatory Control Systems of Two Amphibian Locomotor Networks

Attempts to understand the neural mechanisms which produce behaviour must consider both prevailing sensory cues and the central cellular and synaptic changes they direct. At each level, neuromodulation can additionally shape the final output. We have investigated neuromodulation in the developing spinal motor networks in hatchling tadpoles of two closely related amphibians, Xenopus laevis and Rana temporaria to examine the subtle differences in their behaviours that could be attributed to their evolutionary divergence. At the point of hatching, both species can swim in response to a mechanosensory stimulus, however Rana embryos often display a more forceful, non-locomotory coiling behaviour. Whilst the synaptic drive that underlies these behaviours appears similar, subtle inter-specific differences in neuronal properties shape motor outputs in different ways. For example, Rana neurons express N-methyl-D-aspartate (NMDA)/serotonin (5-HT)-dependent oscillations, not present in hatchling Xenopus and many also exhibit a prominent slow spike after-hyperpolarisation. Such properties may endow the spinal circuitry of Rana with the ability to produce a more flexible range of outputs. Finally, we compare the roles of the neuromodulators 5-HT, noradrenaline (NA) and nitric oxide (NO) in shaping motor outputs. 5-HT increases burst durations during swimming in both Xenopus and Rana, but 5-HT dramatically slows the cycle period in Rana with little effect in Xenopus. Three distinct, but presumably homologous NO-containing brainstem clusters of neurons have been described, yet the effects of NO differ between species. In Xenopus, NO slows and shortens swimming in a manner similar to NA, yet in Rana NO and NA elicit the non-rhythmic coiling pattern