Collaborative working in a large pharmaceutical company: Developing better practices through a structurational schema

This paper presents the ongoing case study of a large pharmaceutical organisation currently undertaking a number of changes to their work practices. These collaborative changes are being facilitated by groupware systems. In many instances this has led to the rejection of or resistance to the more complex tools. The paper outlines research, based on a perspective informed by structuration theory, that provides the organisation with an approach to supporting staff in this new ‘collaborative environment’. An example, drawn from the case study, shows how such support might be developed and presents a set of recommendations for supporting a particular group, based on this research schema.     

Lead soaps in paintings: Friends or foes?

The origin(s) and role(s) of metal soaps in paints are a worldwide concern today. These hybrid compounds, containing both fatty acid chains and metals associated with a carboxylate function, are increasingly identified in paints. As reviewed in the first part of this work, the presence of metal soaps in paints is differently interpreted in scientific publications: metal soaps are sometimes considered to play a positive role as anchor points, during paint drying processes; they can also be considered as responsible for many degradation processes (protrusions, efflorescences, darkening, etc.). Their origins are also interpreted in various ways. In some paintings (in particular from the twentieth century), they have sometimes introduced on purpose, as additives, to modify the physical properties of the painting materials. In older paintings, metal soaps are usually thought to result from an uncontrolled reaction of oil with lead-based pigments, in particular lead white, red lead, and lead tin yellow. In the second part of this work, the review of historical recipes of lead-based paint shows an important number of recipes based on controlled mixing of oil with lead driers. In the third part, the experimental reproduction of such traditional recipes using walnut oil and litharge (PbO) shows that lead soaps can be formed, both in about one hour at ～100°C, or in about one month at room temperature. It shows as well that after a few years, litharge is no longer detected in the paint medium, while different lead carbonates are. Finally, the micro-infrared spectroscopy and micro-X-ray diffraction re-analysis of protrusions from a nine-year model painting shows together with lead soaps, the presence of Pb₅(CO₃)₃(OH)₂O (‘synthetic plumbonacrite’), an unusual phase recently observed in a protrusion from a painting by Vincent Van Gogh. This work highlights (i) the multiple origins and roles of metal soaps in paints and (ii) the importance of combining the analysis of fragments from historical paintings with the analysis and reproduction of historical recipes. In particular, we show that the components detected today in historical paintings may severely differ from those originally used or prepared by the painter, complicating the assessment of the painter's intentions. More than the presence of metal soaps, the key questions to be tackled should be about their origins and (re)mobilization.     

PROSPECTIVE TEACHERS' AWARENESS AND EXPRESSION OF EMOTIONS: ASSOCIATIONS WITH PROPOSED STRATEGIES FOR BEHAVIORAL MANAGEMENT IN THE CLASSROOM

This research examined whether prospective teachers’ emotion regulation styles, dispositional empathy, and conceptions of competent student emotion and behavior were predictive of their attitudes about bullying and proposed responses to peer conflict. Overall, participants perceived physical bullying as more serious than verbal and relational bullying. Prospective teachers also expressed higher levels of sympathy for victims and a greater likelihood of intervention in response to physical bullying. Regression analyses demonstrated that valuing emotional competence and the role of teachers in supporting its development were meaningfully associated with expressed support for victims and with proposed responses to the perpetrators of this type of classroom aggression. Interestingly, those respondents who reported higher levels of situationally specific sympathy for victims (and not dispositional empathy) also reported that they would be more likely than their counterparts to intervene on their behalf. The emotional reactivity component of dispositional empathy was, however, positively associated with regulated responses to peer conflict involving a difficult child. The emotion regulation variables, although associated with the outcome measures in correlational analyses, were not unique predictors of prospective teachers’ bullying attitudes.     

Click-based evidence for decaying weight distributions in search effectiveness metrics

Search effectiveness metrics are used to evaluate the quality of the answer lists returned by search services, usually based on a set of relevance judgments. One plausible way of calculating an effectiveness score for a system run is to compute the inner-product of the run’s relevance vector and a “utility” vector, where the ith element in the utility vector represents the relative benefit obtained by the user of the system if they encounter a relevant document at depth i in the ranking. This paper uses such a framework to examine the user behavior patterns—and hence utility weightings—that can be inferred from a web query log. We describe a process for extrapolating user observations from query log clickthroughs, and employ this user model to measure the quality of effectiveness weighting distributions. Our results show that for measures with static distributions (that is, utility weighting schemes for which the weight vector is independent of the relevance vector), the geometric weighting model employed in the rank-biased precision effectiveness metric offers the closest fit to the user observation model. In addition, using past TREC data as to indicate likelihood of relevance, we also show that the distributions employed in the BPref and MRR metrics are the best fit out of the measures for which static distributions do not exist.     

The instructional gestalt: A conceptual framework and design for educational research

Summary The argument is advanced in this paper that the pattern of educational investigation wherein comparisons are made between so-called “ experimental” and “ conventional” instructional procedures tends to be defective on three counts: the criteria are often inappropriate or contaminated; the assumptions of homogeneity within and independence between “ experimental” and “ control” conditions are met only when these conditions are very grossly conceived; and the results reflect masking and cancellation effects, thereby revealing relatively little about what transpires in an instructional setting. The Instructional Gestalt is proposed as a methodological framework for educational research focusing upon the interactive nature of learner, instructor, and environmental and course variables constituting the instructional setting. Data generated by explorations within this framework can lead to the formulation of hypotheses which, if subsequently supported empirically, can become principles for inclusion in a theory of classroom learning. The nature of investigations proceeding from the Instructional Gestalt framework was clarified by presentation and discussion of an illustrative study. Since this illustration was only a representation in miniature of the larger investigation, the generalizations about teaching-learning suggested by it are of limited scope and subject to change. Nevertheless, these generalizations do indicate the kinds of hypotheses resulting from studies within the Instructional Gestalt framework. This paper summarizes the rationale underlying research on the Instructional Gestalt proceeding under a grant from the Office of Education, U.S. Department of Health, Education, and Welfare. Portions of this rationale have been presented at the annual meetings of the American Psychological Association in 1961 and 1962.     

A Comparative Study of Selected Handball Techniques

Abstract

This study compared the effectiveness of the two most commonly used handball arm-hand actions in relation to (a) handball velocity, (b) time required to execute each stroke and (c) distance the striking hand travels during the propulsive phase of each stroke. Handball velocity was measured with the Hale Reaction-Performance Timer. The data for the remaining variables were obtained through cinematographical analysis. Eleven experienced handball players at Springfield College were selected as subjects. Velocity results indicated that significant differences existed between the flexion-extension and straight arm techniques. Differences between the two stroking techniques for execution time and hand distance traveled were found, although the data for these two variables were not scrutinized statistically.