The Nature of Teacher Learning in Collaborative Data Teams

As data teams have grown in popularity in recent years, they have been increasingly looked to by educational researchers because of the tantalizing prospect of combining teachers’ on the job professional development with increased and effective data use to drive instruction. Data teams have been increasingly implemented within schools by educational leaders attempting to take advantage of what teachers learn from each other in the context of a data team. Many conceptual models of data team function have been proposed, but few empirical studies have examined how teachers learn from collaborating with each other in a data team. This paper explores the nature of teachers’ learning in data teams, uncovering key factors that impact the learning opportunities created by collaborating around student data

Expression of the Hsp23 chaperone during Drosophila embryogenesis: association to distinct neural and glial lineages

BACKGROUND: In addition to their strong induction following stress, small heat shock proteins (Hsp) are also expressed during development in a wide variety of organisms. However, the precise identity of cell(s) expressing these proteins and the functional contribution of small heat shock proteins in such developmental context remain to be determined. The present study provides a detailed description of the Drosophila small heat shock protein Hsp23 expression pattern during embryogenesis and evaluates its functional contribution to central nervous system development. RESULTS: Throughout embryogenesis, Hsp23 is expressed in a stage-specific manner by a restricted number of neuronal and glial lineages of the central nervous system. Hsp23 is also detected in the amnioserosa and within a single lateral chordotonal organ. Its expression within the MP2 lineage does not require the presence of a functional midline nor the activity of the Notch signaling pathway. Transactivation assays demonstrate that transcription factors implicated in the differentiation of the midline also regulate hsp23 promoter activity. Phenotypic analysis of a transgenic line exhibiting loss of Hsp23 expression in the central nervous system suggests that Hsp23 is not required for development and function of this tissue. Likewise, its overexpression does not cause deleterious effects, as development remains unaffected. CONCLUSIONS: Based on the presented data, we suggest that the tightly regulated developmental expression of Hsp23 is not actively involved in cell differentiation and central nervous system development per se but rather reflects a putative role in preventive "pre-stress" neuroprotection or in non-vital process(es) common to the identified cell lineages

Injecting New Workforce Leaders in Tourism, Hospitality and Environmental Science: A Community-Engaged Learning and Immersion Class

Tourism, especially nature-based tourism, is a major and growing industry in Maine. Therefore, it is important that colleges and universities graduate leaders into the Maine workforce with specific knowledge of the tourism and hospitality industry and with a connection to the environment in which it is flourishing. To graduate these potential leaders, schools must do a better job at retaining and graduating students from diverse socioeconomic backgrounds. Community-engaged learning, including immersion classes, are a key strategy to increase student persistence in some programs at the University of Southern Maine (USM). Two academic units at USM, the Program in Tourism and Hospitality and the Department of Environmental Science and Policy, collaborate in delivering a colocated intensive immersion class for all new majors. This engagement early in their college career fosters a sense of community among the students and with the industry in which they will work. We argue that this community engagement is a factor contributing to student retention and success in these programs and will help create the creative, resilient, locally active leaders needed to guide sustainable tourism development in Maine

Les coûts de la réglementation : une revue de la littérature

It is now well recognized that all types of regulation are imposing costs on our society. The studies which have tried to evaluate these costs are numerous and their methologies are diversified. This paper is proposing a critical analysis of these methodologies and of the results obtained by researchers who have tried to evaluate the costs of regulation. Before that, however, we develop an analytical framework for examining the impact of regulation on firms'costs, economic efficiency and the well-being of the population in general. This section will be based on cost-benefit analysis Il est de plus en plus reconnu que la réglementation omniprésente autour de nous impose un coût important à nos économies. Les études qui ont cherché à estimer ce coût sont nombreuses et les méthodologies utilisées sont variées. Ce texte propose une analyse critique des méthodologies développées et des résultats obtenus par les chercheurs qui ont estimé les coûts directs de la réglementation pour les économies modernes.0501s avant de ce faire, nous développerons un cadre d'analyse de l'impact de la réglementation sur les coûts des entreprises, sur l'efficacité économique et le bien-être de la population. Cette section se basera sur l'analyse avantages-coûts.Regulation, cost-benefit analysis, Réglementation, analyse avantages-coûts

A generalization of the field of fractions of an integral domain

In this paper the author deals with the problem of constructing the field of fractions of an integral domain and a generalization of one of the methods of construction used to construct a ring of left quotients for an arbitrary ring. In this generalization the author relies heavily upon the concept of a faithful complete filter and defines partial endomorphisms from the filter elements into the ring. After partitioning these partial endomorphisms into equivalence classes and after defining operations on the equivalence classes the author then shows that the resultant structure is a ring of left quotients. In addition to showing that a faithful complete filter assures the existence of a ring of left quotients the author shows that these rings of left quotients can be embedded in the Utumi ring of left quotients

Electron Emission from Foils and Biological Materials after Proton Impact

Electron emission spectra from thin metal foils with thin layers of water frozen on them (amorphous solid water) after fast proton impact have been measured and have been simulated in liquid water using the event-by-event track structure code PARTRAC. The electron transport model of PARTRAC has been extended to simulate electron transport down to 1 eV by including low-energy phonon, vibrational and electronic excitations as measured by Michaud et al. (Radiat. Res. 159, 3–22, 2003) for amorphous ice. Simulated liquid water yields follow in general the amorphous solid water measurements at higher energies, but overestimate them significantly at energies below 50 eV. Originally published Radiation Physics and Chemistry, Vol. 77, No. 10-12, Oct-Dec 200

Increased Sugar Concentration with PM-Cutting and Wide Swathing Improves Alfalfa Silage Fermentation

Extensive protein degradation during silage fermentation reduces the efficiency of N utilization by ruminants and excess N is excreted in the environment. Forage nonstructural carbohydrates (NSC) represent the main source of readily fermentable energy for lactic bacteria during silage fermentation. Increasing forage NSC concentration can enhance silage fermentation, lactic acid production, and the decline in pH with an overall reduction in the extent of protein degradation. The NSC concentration increases during the day in alfalfa (Medicago sativa L.) to reach a maximum by the end of the afternoon. Under good wilting conditions, PM-cut alfalfa wilted in wide swaths had a greater NSC concentration than AM-cut alfalfa (Morin et al. 2012). Our objective was to study the effect of PM cutting and wide swathing on alfalfa silage quality attributes