448 research outputs found

    The Compton-thick quasar at the heart of the high-redshift giant radio galaxy 6C 0905+39

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    Our XMM-Newton spectrum of the giant, high-redshift (z=1.88) radio galaxy 6C 0905+39 shows that it contains one of the most powerful, high-redshift, Compton-thick quasars known. Its spectrum is very hard above 2 keV. The steep XMM spectrum below that energy is shown to be due to extended emission from the radio bridge using Chandra data. The nucleus of 6C 0905+39 has a column density of 3.5 (+1.4,-0.4) X 10^24 cm^-2 and absorption-corrected X-ray luminosity of 1.7 (+0.9,-0.1) X 10^45 erg/s in the 2-10 keV band. A lower redshift active galaxy in the same field, SDSS J090808.36+394313.6, may also be Compton-thick.Comment: 5 pages, 5 figures, accepted to MNRA

    Emotional Dimensions of Teaching in Elementary Education Preparation

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    Student teaching is a pivotal event in teacher education preparation programs, and there is a need to investigate emotions in teaching. This study examined how one elementary program navigated the emotional dimensions of teaching. Findings revealed that the emotional dimensions of student teachers were influenced by individualized factors unique to the teacher; certain emotions were perceived as more acceptable to express; and supervisors needed to support student teachers to manage and respond to the emotional dimensions of teaching. The recommendation is to go beyond the technical and academic aspects of teaching and address the emotional dimensions to best prepare the whole teacher

    Emotional Dimensions of Teaching in Elementary Education Preparation

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    Student teaching is a pivotal event in teacher education preparation programs, and there is a need to investigate emotions in teaching. This study examined how one elementary program navigated the emotional dimensions of teaching. Findings revealed that the emotional dimensions of student teachers were influenced by individualized factors unique to the teacher; certain emotions were perceived as more acceptable to express; and supervisors needed to support student teachers to manage and respond to the emotional dimensions of teaching. The recommendation is to go beyond the technical and academic aspects of teaching and address the emotional dimensions to best prepare the whole teacher

    School Leadership Support: Understanding the Experiences of Elementary-Level Teachers During a Global Health Pandemic

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    The purpose of this study was to better understand how the current COVID-19 global health pandemic has professionally and emotionally impacted elementary-level teachers. Teachers experienced diverse challenges during this unprecedented time with a rapid shift from in-person to online learning. Two overarching themes emerged based on participant experiences: abandoning best practices and increased stress and emotional pain. Implications for practice included the need for school leaders to evaluate the current level of support being provided to teachers and assess areas of need to support professional and emotional growth with the backdrop of the pandemic. We encourage future research with all educators to better understand how they are experiencing this health pandemic including the school leaders themselves

    Two types of shock in the hotspot of the giant quasar 4C74.26: a high-resolution comparison from Chandra, Gemini & MERLIN

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    New Chandra observations have resolved the structure of the X-ray luminous southern hotspot in the giant radio quasar 4C74.26 into two distinct features. The nearer one to the nucleus is an extremely luminous peak, extended some 5 kpc perpendicular to the orientation of the jet; 19 kpc projected further away from the central nucleus than this is a fainter X-ray arc having similar symmetry. This arc is co-spatial with near-IR and optical emission imaged with Gemini, and radio emission imaged with MERLIN. The angular separation of the double shock structure (itself ~19 kpc or 10 arcsec in size) from the active nucleus which fuels them of ~550 kpc is a reminder of the challenge of connecting "unidentified" hard X-ray or Fermi sources with their origins.Comment: In press at MNRA

    A randomised controlled trial of blood pressure self-monitoring in the management of hypertensive pregnancy. OPTIMUM-BP:A feasibility trial

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    Objective: To assess the feasibility of a blood pressure self-monitoring intervention for managing pregnancy hypertension. Study design: OPTIMUM-BP was an unmasked randomised controlled trial comparing a self-monitoring of blood pressure (SMBP) intervention versus usual care for the management of pregnancy hypertension. Women with chronic (CH) or gestational hypertension (GH) from 4 UK centres were randomised (2:1) intervention to control. Self-monitoring involved daily home blood pressure (BP) measurements, with recording via study diary or telemonitoring. Clinicians were invited to use the home readings in clinical and antihypertensive titration decisions. Main outcomes: The primary outcomes were recruitment, retention, adherence and persistence with the intervention. Results: Women from four UK centres were randomised: 158/222 (71%) of those approached agreed, comprising: 86 women with chronic hypertension (55 SMBP, 31 control) and 72 with gestational hypertension (49 SMBP, 23 control) of whom outcome data were available from 154 (97%) and were included in the analysis. The median (IQR) number of days with home BP readings per week were 5.5 (3.1–6.5) for those with chronic hypertension and 6.1 (4.5–6.7) with gestational hypertension. Participants persisted with the intervention for 80% or more of their time from enrolment until delivery in 86% (43/50) and 76% (38/49) of those with chronic and gestational hypertension respectively. Recorded clinic and study BPs were similar for both groups. Conclusions: This is the first randomised investigation of BP self-monitoring for the management of pregnancy hypertension and indicates that a large RCT would be feasible.</p

    Multiwavelength study of Cygnus A II. X-ray inverse-Compton emission from a relic counterjet and implications for jet duty-cycles

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    The duty-cycle of powerful radio galaxies and quasars such as the prototype Cygnus A is poorly understood. X-ray observations of inverse-Compton scattered Cosmic Microwave Background (ICCMB) photons probe lower Lorentz-factor particles than radio observations of synchrotron emission. Comparative studies of the nearer and further lobes, separated by many 10s of kpc and thus 10s of thousands of years in light-travel time, yield additional temporal resolution in studies of the lifecycles. We have co-added all archival Chandra ACIS-I data and present a deep 200 ks image of Cygnus A. This deep image reveals the presence of X-ray emission from a counterjet i.e. a jet receding from Earth and related to a previous episode of jet activity. The non-thermal X-ray emission, we interpret as ICCMB radiation. There is an absence of any discernible X-ray emission associated with a jet flowing towards Earth. We conclude that: (1) The emission from a relic jet, indicates a previous episode of jet activity, that took place earlier than the current jet activity appearing as synchrotron radio emission. (2) The presence of X-ray emission from a relic counterjet of Cygnus A and the absence of X-ray emission associated with any relic approaching jet constrains the timescale between successive episodes of jet activity to ~10^6 years. (3) Transverse expansion of the jet causes expansion losses which shifts the energy distribution to lower energies. (4) Assuming the electrons cooled due to adiabatic expansion, the required magnetic field strength is substantially smaller than the equipartition magnetic field strength. (5) A high minimum Lorentz factor for the distribution of relativistic particles in the current jet, of a few 10^3, is ejected from the central nucleus of this active galaxy. Abridged.Comment: Accepted for publication by MNRAS, 8 pages Dates in Table 1 correcte
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