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

Oleic acid is elevated in cell membranes during rapid cold-hardening and pupal diapause in the flesh fly, Sarcophaga crassipalpis.

The integrity of cellular membranes is critical to the survival of insects at low temperatures, thus there is tremendous advantage conferred to insects that can adjust their composition of membrane fatty acids (FA’s). Such changes, known as homeoviscous adaptation, allow cellular membranes to maintain a liquid-crystalline state at temperatures that are normally low enough to cause the membrane to enter the gel state and lose the ability to maintain homeostasis. Flesh flies (Sarcophaga crassipalpis) were subjected to two experimental conditions that elicit low temperature tolerance: rapid cold-hardening and diapause. FA’s were isolated and analyzed using gas chromatography-mass spectrometry. FA’s changed in response to both rapid cold-hardening and diapause. In response to rapid cold-hardening, the proportion of oleic acid (18:1n-9) in pharate adults increased from 30% to 47% of the total fatty acid pool. The proportion of almost every other FA was reduced. Diapausing pupae experienced an even greater increase in oleic acid proportion to 58% of the total FA pool. Oleic acid not only increases membrane fluidity at low temperature, but also allows the cell membrane to maintain a liquid crystalline state should the temperature increase. This is the first demonstration of homeoviscous adaptation in a cold-hardy insect with a pupal diapause

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

A Fatal Rectus Sheath Hematoma after a Myasthenia Crisis Case Report

Introduction: Rectus sheath hematomas (RSH) generally occur due to damage to the inferior epigastric artery. They are rare causes of abdominal pain or acute blood loss anemia, but are an important diagnostic consideration because they can be cryptic and are potentially fatal. Clinical Findings: An 85-year-old female who had been admitted to the hospital for 10 days with a myasthenia crisis was found to be abruptly hypotensive with a tender abdominal mass in the left lower quadrant subtly crossing midline. She was on prophylactic anticoagulation during her hospitalization. Main diagnosis, therapeutics, interventions, and outcomes: The patient was initially stabilized with fluids and received one unit of packed red blood cells. A CT-angiogram of her abdomen and pelvis demonstrated a type III RSH. She underwent a percutaneous inferior epigastric artery embolization via interventional radiology. Unfortunately, she did not recover and was transitioned to hospice, dying one day after discharge. Conclusion: Although classic teaching about RSHs includes an association with systemic anticoagulation and a physical exam notable for a mass not crossing the midline, it is important to recognize a wider range of presentations including an abdominal mass that crosses the midline, as demonstrated by our patient. Other important risk factors include frailty, immunosuppression, and possibly abdominal injections (particularly heparin)

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

Architect's retaliation against the mortgage industry and a computational investigation into do-it-yourself design-build

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 2008.Includes bibliographical references (leaves 91-92).This thesis proposes a novel system for the design, fabrication, and assembly of the single-family home. Driven by the American mortgage crises of the early-20th Century, the proposal selects for its client-type the foreclosed ex-homeowner and thus the constraint of a mortgage-free homeownership solution. The thesis presents a holistic view of residential architecture, taking into account the social, economic, technical, and geographical constituents comprising the current realities and the present possibilities of American homeownership. Specifically, this thesis demonstrates the technical possibility for a do-it-yourself design and assembly system for the mass-customized expansion of a single-family over its lifetime and the positive effects of such customization at the level of the suburban development.by Dennis Michaud.M.Arch

Occurrence of Lake Chub, Couesius plumbeus, in Northern Labrador

Lake Chub (Couesius plumbeus) were recently found in seven previously undocumented locations in northern Labrador. These populations represent the first recorded accounts of this species in the Labrador region north of the Churchill River drainage and east of the George River. Lake Chub likely invaded this region via dispersal routes provided by eastern spillways of glacial Lake Naskaupi

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