Developing Teacher Leaders in Math and Science: Content Coaches Mentoring Teacher Leaders

The AMSTI (Alabama Math Science Technology Initiative)-USA Fellows program, a collaboration between a university College of Education and Arts & Sciences, State Department of Education, and local school district, was created to develop Teacher Leaders in AMSTI Mathematics and Science. The specific focus of this research was to examine the mentoring provided to the Teacher Leaders Fellows, and to determine if the professional development provided to the teacher leaders helped them develop mentoring skills to mentor and coach the AMSTI teachers with whom they worked. At the completion of their Fellowship, these AMSTI-USA Fellows returned to become teacher leaders at their home schools, charged with mentoring and coaching teachers in the AMSTI curriculum. The objectives of this research was to evaluate the effectiveness of: (1) mentoring the newly identified teacher leader Fellows into the role of teacher leader; and, (2) developing the mentoring and coaching skills in both the affective components and content aspects of the selected AMSTI Teacher Leader Fellows

Y a-t-il des politiques migratoires nationales ? De quelques leçons des années 1920

Depuis une vingtaine d'années, l'historiographie prête une attention de plus en plus fine au rôle des États dans le contrôle des migrations internationales, entendu dans ses aspects à la fois politiques et économiques. De la reconstitution du cadre légal des politiques publiques, à la sociographie de leur mise en oeuvre quotidienne par les fonctionnaires en contact avec les migrants, émergent des aspects toujours plus nombreux de la " tyrannie du national "2. On peut cependant, en croisant les approches portant sur plusieurs pays d'émigration et d'immigration, et en élargissant l'échelle d'observation à un espace transnational, mettre l'accent sur des aspects complémentaires, dont la prise en considération est indispensable à la compréhension des dynamiques et des tensions de ce que l'on a parfois désigné comme une " première mondialisation "3 (...)

Y a-t-il des politiques migratoires nationales ? De quelques leçons des années 1920

Depuis une vingtaine d’années, l’historiographie prête une attention de plus en plus fine au rôle des États dans le contrôle des migrations internationales, entendu dans ses aspects à la fois politiques et économiques. De la reconstitution du cadre légal des politiques publiques, à la sociographie de leur mise en oeuvre quotidienne par les fonctionnaires en contact avec les migrants, émergent des aspects toujours plus nombreux de la « tyrannie du national »2. On peut cependant, en croisant les approches portant sur plusieurs pays d’émigration et d’immigration, et en élargissant l’échelle d’observation à un espace transnational, mettre l’accent sur des aspects complémentaires, dont la prise en considération est indispensable à la compréhension des dynamiques et des tensions de ce que l’on a parfois désigné comme une « première mondialisation »3 (...)

FUSE and HST STIS Observations of Hot and Cold Gas in the AB Aurigae System

We present the first observations of a Herbig Ae star with a circumstellar disk by the Far Ultraviolet Spectroscopic Explorer (FUSE), as well as a simultaneous observation of the star obtained with the Hubble Space Telescope Space Telescope Imaging Spectrograph (STIS). The spectra of AB Aurigae show emission and absorption features arising from gasses that have a wide range in temperature, from hot OVI emission to cold molecular hydrogen and CO absorption. Emissions from the highly ionized species OVI and CIII present in the FUSE spectrum are redshifted, while absorption features arising from low-ionization species like OI, NI, and SiII are blueshifted and show characteristic stellar wind line-profiles. We find the total column density of molecular hydrogen toward AB Aur from the FUSE apectrum, N(H_2) = (6.8 +/- 0.5) x 10^19 cm^-2. The gas kinetic temperature of the molecular hydrogen derived from the ratio N(J=1)/N(J=0) is 65 +/- 4 K. The column density of the CO observed in the STIS spectrum is N(CO) = (7.1 +/- 0.5) x 10^13 cm^-2, giving a CO/H_2 ratio of (1.04 +/- 0.11) x 10^-6. We also use the STIS spectrum to find the column density of HI, permitting us to calculate the total column density of hydrogen atoms, the fractional abundance of H_2, and the gas-to-dust ratio.Comment: 5 pages, including 6 figures. LaTex2e (emulateapj5.sty). Accepted for publication in ApJ Letter

Renin-Angiotensin-Aldosterone System Inhibitors in Patients with Covid-19

COVID-19 is a new disease caused by the Sars-CoV-2 virus and the vast majority of patients have symptoms similar to a flu-like syndrome. A small portion of those infected ends up being hospitalized and may develop with the most severe presentation of the disease. Data from Chinese series report that hypertension appears to be a condition that imposes a greater risk of unfavorable evolution of patients. Some studies have reported that Sars-CoV-2 uses the angiotensin-converting enzyme to access its target cells. There are theories that differ about the protective or harmful role that drugs that act in the renin angiotensin aldosterone system in these patients. A British study suggests that patients using angiotensin-converting enzyme inhibitors had a lower incidence of severe forms of the disease. Another study carried out a retrospective and multicenter analysis showing that mortality was lower in the group that had used the drugs when compared to the other group (3,7 vs. 9,8%; p=0,01). The various hypotheses raised through pathophysiology are not yet able to really predict the best course of action for patients using drugs that act on the renin angiotensin system. Thus, a randomized study becomes important to try to answer definitively and with a high degree of reliability to this question

Renin-Angiotensin-Aldosterone System Inhibitors in Patients with Covid-19

COVID-19 is a new disease caused by the Sars-CoV-2 virus and the vast majority of patients have symptoms similar to a flu-like syndrome. A small portion of those infected ends up being hospitalized and may develop with the most severe presentation of the disease. Data from Chinese series report that hypertension appears to be a condition that imposes a greater risk of unfavorable evolution of patients. Some studies have reported that Sars-CoV-2 uses the angiotensin-converting enzyme to access its target cells. There are theories that differ about the protective or harmful role that drugs that act in the renin angiotensin aldosterone system in these patients. A British study suggests that patients using angiotensin-converting enzyme inhibitors had a lower incidence of severe forms of the disease. Another study carried out a retrospective and multicenter analysis showing that mortality was lower in the group that had used the drugs when compared to the other group (3,7 vs. 9,8%; p=0,01). The various hypotheses raised through pathophysiology are not yet able to really predict the best course of action for patients using drugs that act on the renin angiotensin system. Thus, a randomized study becomes important to try to answer definitively and with a high degree of reliability to this question

Cytoskeletal variations in an asymmetric cell division support diversity in nematode sperm size and sex ratios

Asymmetric partitioning is an essential component of many developmental processes. As spermatogenesis concludes, sperm are streamlined by discarding unnecessary cellular components into cellular wastebags called residual bodies (RBs). During nematode spermatogenesis, this asymmetric partitioning event occurs shortly after anaphase II, and both microtubules and actin partition into a central RB. Here, we use fluorescence and transmission electron microscopy to elucidate and compare the intermediate steps of RB formation in Caenorhabditis elegans, Rhabditis sp. SB347 (recently named Auanema rhodensis) and related nematodes. In all cases, intact microtubules reorganize and move from centrosomal to non-centrosomal sites at the RB-sperm boundary whereas actin reorganizes through cortical ring expansion and clearance from the poles. However, in species with tiny spermatocytes, these cytoskeletal changes are restricted to one pole. Consequently, partitioning yields one functional sperm with the X-bearing chromosome complement and an RB with the other chromosome set. Unipolar partitioning may not require an unpaired X, as it also occurs in XX spermatocytes. Instead, constraints related to spermatocyte downsizing may have contributed to the evolution of a sperm cell equivalent to female polar bodies

The microbiome in chronic inflammatory airway disease : a threatened species

The human body is exposed to a multitude of microbes and infectious organisms throughout life. Many of these organisms colonise the skin, gastrointestinal tract (GIT) and airway. We now recognise that this colonisation includes the lower airway, previously thought to be sterile. These colonising organisms play an important role in disease prevention, including an array of chronic inflammatory conditions that are unrelated to infectious diseases. However, new evidence of immune dysregulation suggests that early colonisation, especially of the GIT and airway, by pathogenic micro-organisms, has deleterious effects that may contribute to the potential to induce chronic inflammation in young children, which may only express itself in adult life.The South African Allergic Rhinitis Working Group is an independent organisation. An annual meeting is supported by an unrestricted educational grant from Aspen Pharmahttp://www.samj.org.zaam2016Paediatrics and Child Healt

Discovery of Two Distant Type Ia Supernovae in the Hubble Deep Field North with the Advanced Camera for Surveys

We present observations of the first two supernovae discovered with the recently installed Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The supernovae were found in Wide Field Camera images of the Hubble Deep Field North taken with the F775W, F850LP, and G800L optical elements as part of the ACS guaranteed time observation program. Spectra extracted from the ACS G800L grism exposures confirm that the objects are Type Ia supernovae (SNe Ia) at redshifts z=0.47 and z=0.95. Follow-up HST observations have been conducted with ACS in F775W and F850LP and with NICMOS in the near-infrared F110W bandpass, yielding a total of 9 flux measurements in the 3 bandpasses over a period of 50 days in the observed frame. We discuss many of the important issues in doing accurate photometry with the ACS. We analyze the multi-band light curves using two different fitting methods to calibrate the supernovae luminosities and place them on the SNe Ia Hubble diagram. The resulting distances are consistent with the redshift-distance relation of the accelerating universe model, although evolving intergalactic grey dust remains as a less likely possibility. The relative ease with which these SNe Ia were found, confirmed, and monitored demonstrates the potential ACS holds for revolutionizing the field of high-redshift SNe Ia, and therefore of testing the accelerating universe cosmology and constraining the "epoch of deceleration".Comment: 11 pages, 8 embedded figures. Accepted for publication in Ap

Prevalency of smoking in medicine students

O tabagismo é atualmente a principal causa de enfermidades evitáveis e incapacidades prematuras em âmbito mundial, sendo que a Organização Mundial de Saúde (OMS) estima cerca de 10 milhões de mortes anuais nos próximos 30 a 40 anos em virtude de complicações de saúde decorrentes do tabaco. Apesar de possuir uma função preventiva em programas antitabagistas, estudos recentes revelam que a classe médica possui porcentagem significativa de profissionais fumantes, abalando a credibilidade da mensagem de que fumar é lesivo à saúde. Devido a diversos fatores, dentre eles as dificuldades acadêmicas impostas pelo treinamento médico, parcela significativa de médicos começa a fumar durante a faculdade. O trabalho atual tem como meta analisar a prevalência de tabagismo entre 241 acadêmicos de medicina, através de questionário validado. Verificou-se uma incidência média de 17,8% de fumantes cuja idade média foi de 21,6 anos e tempo médio de consumo de tabaco de 5,9 anos. Os autores do trabalho concluem a importância de se conhecer os dados de tabagismo dentre os estudantes de medicina consiste em reforçar a necessidade de campanhas de cessação do fumo em todas as classes da sociedade, inclusive e, principalmente, dentre os futuros profissionais médicos que serão os principais agentes na prevenção do tabagismo.This is a epidemiological paper concerning the use of cigarettes by medicine students and also a literature review based on several different articles. According to the World Health Organization (WHO), smoking is the main cause of preventable diseases in the planet and is directly responsible for about 8 millions deaths a year. Such numbers aren’t a big surpise for any educated reader, but what is interesting is that despite this, the number of smokers are progressively growing. The medical class, which are the people responsible for informing and warning the population have agreat percentage of smokers. The present paper illustrate this fact, through a questionnaire answered by 241 students with a percentage of 17.8% smokers. This fact may be related to the stress involved in the medical course, associated with lack of time in their private lives. The author concludes that having reliable smoking data about the medicine students is of vital importance, demonstrating the need of emphases in prevention campaigns in all society classes, especially among health students, who will be the main agents in promoting health in the future