Authority and Cooperation: Five Views from Writing Center Directors

For this issue of Praxis, focusing on authority and cooperation, the editors composed a survey exploring various aspects of the topic, which we sent to several directors of writing centers around the country. The survey asked directors to think about general writing center philosophy, directive versus nondirective consulting approaches, writing center dynamics, training methods, and the consultant's authority. The following article provides an overview of the responses we received. Readers can click on the names in the following paragraph to see each director's responses in full.University Writing Cente

Pagecasting in the UWC: Writing, Digital Media, and Communtiy Outreach

As writing centers adapt to the influx of students with nontraditional writing assignments, such as hypertexts and other digital creations, the response of consultants and administrators has often been a somewhat defensive one. To some extent, writing centers must see new technology from this type of reactionary perspective: students bring in writing projects that their instructors assign, and consultants respond as best they can to meet the students’ writing needs. But writing centers are in the unique position to take a lead role in developing technologically aided approaches to education. Therefore, in the face of adapting to the challenges of these new forms of writing, we have taken a proactive role in teaching students to write in digital environments. Using writing center methods and philosophy in a classroom environment, we have found that we can empower students to express themselves in digital media and, in the process, improve their writing in more traditional text-based forms.University Writing Cente

'We shall really have to do something about your equipment' : the projectionist’s negotiation of obsolescence in the Smallest Show on Earth and Coming Up Roses

This article analyses two British film comedies, The Smallest Show on Earth (1957) and the Welsh-language film Coming Up Roses (Rhosyn a Rhith) (1986), both of which feature projectionists as significant characters. It focuses on the implications of the projectionist as a hero within the narratives, on his portrayal and on the dramatisation of his labour. I examine the paradox of his inhabiting a central narrative role when his professional one requires his isolation and invisibility; when his own attention is funnelled towards the on-screen diegesis he is concerned to project and, moreover, when his obsolescence is mandated by cinema closure. The films’ promotion of exhibition itself as object and comedic spectacle is interrogated. Within this, I attend closely to diegetic films: to how the fictive screen relates to the wider text and to how it figures or expresses its concerns and enlarges its meanings. A related area of enquiry is how institutions of cinema mirror and ‘project’ wider social issues and how cinema shapes, and is shaped by, its audiences. How does the restoration of the projectionist’s libido, and his rehabilitation through marriage, relate to cinema’s place within social, cultural and political life

Probing the Structure and Energetics of Dislocation Cores in SiGe Alloys through Monte Carlo Simulations

We present a methodology for the investigation of dislocation energetics in segregated alloys based on Monte Carlo simulations which equilibrate the topology and composition of the dislocation core and its surroundings. An environment-dependent partitioning of the system total energy into atomic contributions allows us to link the atomistic picture to continuum elasticity theory. The method is applied to extract core energies and radii of 60 degrees glide dislocations in segregated SiGe alloys which are inaccessible by other methods.Comment: 5 pages, to be published in Physical Review Letter

On the Ambiguity of Forgiveness

This article highlights some of the difficulties that accompany any attempt to articulate an understanding of forgiveness that is at once coherent, just and desirable. Through a close examination of Charles Griswold’s book Forgiveness: A Philosophical Exploration, I suggest that there are good reasons to think that forgiveness is intrinsically ambiguous, both conceptually and morally. I argue that there is an underlying tension between the concerns that shape the definition, and those that are invoked when affirming the good of forgiveness. Using Charles Taylor’s A Secular Age, I then provide some commentary concerning this ambiguity and make some brief suggestions about how this ambiguity might be theologically fruitful

Leaf heteroblasty is not an adaptation to shade: seedling anatomical and physiological responses to light

Heteroblastic plants produce markedly different leaf morphologies between juvenile and adult stages, while homoblastic plants exhibit little or gradual changes. We tested the hypothesis that the leaf morphology of the seedling stage of New Zealand heteroblastic species is advantageous in dealing with low light levels found in forest understorey. We used four independent contrasts of heteroblastic and homoblastic seedlings from the genera Aristotelia, Hoheria, Pseudopanax, and Melicope grown in full-sun (100% sunlight) and shade (5% sunlight) light environments in a glasshouse. The four heteroblastic species had consistently smaller leaves and lower specific leaf area than their paired homoblastic species both in sun and shade. In the shade, there were no consistent differences in leaf anatomy (thickness of leaf blade, cuticle, epidermis, and palisade mesophyll, and stomatal density × stomatal aperture length) or physiology (maximum photosynthetic rate, dark respiration, and light compensation point) between homoblastic and heteroblastic species. However, in the sun, heteroblastic A. fruticosa, P. crassifolius, and M. simplex had appreciably thicker leaf blades as well as higher maximum photosynthetic rates than their homoblastic congeners. These traits suggest heteroblastic seedlings possess leaf traits associated with an advantage in high-light environments. We conclude that the heteroblastic seedling leaf morphology is unlikely to be an adaptation to very low light. Alternative explanations for the functional significance of changing leaf morphology in association with life-stage should be sought

The Public Face: Working the Front Desk of the UWC

A student’s first impression of the writing center is typically made at a reception desk. In the Undergraduate Writing Center (UWC) at the University of Texas at Austin, the front desk generally employs two staffers to welcome students, collect intake information, pair students with consultants, and do their best to ensure that consultations run smoothly. As a service that strives to provide a welcoming and supportive environment for students, the front desk's role is clearly important.University Writing Cente

Classification of Ge hut clusters in the arrays formed by molecular beam epitaxy at low temperatures on the Si(001) surface

Morphological investigations and classification of Ge hut clusters forming the arrays of quantum dots on the Si(001) surface at low temperatures in the process of the ultrahigh vacuum molecular beam epitaxy have been carried out using in situ scanning tunnelling microscopy. Two main species of Ge hut clusters composing the arrays - pyramidal and wedge-shaped ones - have been found to have different atomic structures. The inference is made that shape transitions between pyramids and wedges are impossible. The nucleation probabilities of pyramids and wedges equal 1/2 at the initial stage of the array formation. The wedges become the dominating species as the amount of the deposited germanium is increased. A fraction and a density of the pyramids in the arrays are rapidly decreased with the growth of Ge coverage. The derivative types of the clusters - obelisks (or truncated wedges) and accreted wedges - have been revealed and investigated for the first time, they have been found to start dominating at high Ge coverages. The obelisks originate from the wedges as a result of their height limitation and further growth of trapezoid facets. The apexes of the obelisks are formed by sets of the parallel (001) ridges. The uniformity of the cluster arrays have been evidenced to be controlled by the length of the wedge-like clusters. At low growth temperatures (360C) nucleation of new clusters is observed during the array growth at all values of Ge coverage except for a particular point at which the arrays are more uniform than at higher or lower coverages. At higher (530C) temperatures cluster nucleation has not been observed after the initial stage of the array formation.Comment: 27 pages, 11 figures. A brief review of literature is added. Final version accepted to Physics-Uspekhi. Typos are correcte

Orchestrated transcription of biological processes in the marine picoeukaryote Ostreococcus exposed to light/dark cycles

Background: Picoeukaryotes represent an important, yet poorly characterized component of marine phytoplankton. The recent genome availability for two species of Ostreococcus and Micromonas has led to the emergence of picophytoplankton comparative genomics. Sequencing has revealed many unexpected features about genome structure and led to several hypotheses on Ostreococcus biology and physiology. Despite the accumulation of genomic data, little is known about gene expression in eukaryotic picophytoplankton. Results: We have conducted a genome-wide analysis of gene expression in Ostreococcus tauri cells exposed to light/dark cycles (L/D). A Bayesian Fourier Clustering method was implemented to cluster rhythmic genes according to their expression waveform. In a single L/D condition nearly all expressed genes displayed rhythmic patterns of expression. Clusters of genes were associated with the main biological processes such as transcription in the nucleus and the organelles, photosynthesis, DNA replication and mitosis. Conclusions: Light/Dark time-dependent transcription of the genes involved in the main steps leading to protein synthesis (transcription basic machinery, ribosome biogenesis, translation and aminoacid synthesis) was observed, to an unprecedented extent in eukaryotes, suggesting a major input of transcriptional regulations in Ostreococcus. We propose that the diurnal co-regulation of genes involved in photoprotection, defence against oxidative stress and DNA repair might be an efficient mechanism, which protects cells against photo-damage thereby, contributing to the ability of O. tauri to grow under a wide range of light intensities