247 research outputs found

    Improvement of oral reports through the students' use of audio-visual aids

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    Author misnumbered thesis. Please note that there are TWO page 108s, but the continuity is the same. Thesis (Ed.M.)--Boston Universit

    Hubble Space Telescope Grism Spectroscopy of Extreme Starbursts Across Cosmic Time: The Role of Dwarf Galaxies in the Star Formation History of the Universe

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    Near infrared slitless spectroscopy with the Wide Field Camera 3, onboard the Hubble Space Telescope, offers a unique opportunity to study low-mass galaxy populations at high-redshift (zz\sim1-2). While most highz-z surveys are biased towards massive galaxies, we are able to select sources via their emission lines that have very-faint continua. We investigate the star formation rate (SFR)-stellar mass (MM_{\star}) relation for about 1000 emission-line galaxies identified over a wide redshift range of 0.3z2.30.3 \lesssim z \lesssim 2.3. We use the Hα_{\alpha} emission as an accurate SFR indicator and correct the broadband photometry for the strong nebular contribution to derive accurate stellar masses down to M107MM_{\star} \sim 10^{7} M_{\odot}. We focus here on a subsample of galaxies that show extremely strong emission lines (EELGs) with rest-frame equivalent widths ranging from 200 to 1500 \AA. This population consists of outliers to the normal SFR-MM_{\star} sequence with much higher specific SFRs (>10> 10 Gyr1^{-1}). While on-sequence galaxies follow a continuous star formation process, EELGs are thought to be caught during an extreme burst of star formation that can double their stellar mass in less than 100100 Myr. The contribution of starbursts to the total star formation density appears to be larger than what has been reported for more massive galaxies in previous studies. In the complete mass range 8.2<8.2 < log(M/MM_{\star}/M_{\odot}) <10< 10 and a SFR lower completeness limit of about 2 MM_{\odot} yr1^{-1} (10 MM_{\odot} yr1^{-1}) at z1z\sim1 (z2z \sim 2), we find that starbursts having EWrest_{rest}(Hα_{\alpha})>> 300, 200, and 100 A contribute up to 13\sim13, 18, and 34 %, respectively, to the total SFR of emission-line selected sample at z12z\sim1-2. The comparison with samples of massive galaxies shows an increase in the contribution of starbursts towards lower masses.Comment: 11 pages, 6 figures. The Astrophysical Journal, in pres

    Housing and social support for current and former psychiatric patients: A process and outcome evaluation of supportive community living

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    In the current era of deinstitutionalization, community-based residential programs for people with chronic psychiatric disabilities have mushroomed in Canada and the United States. While many researchers have documented the beneficial effects of supportive housing programs on resident’s work productivity and length of community tenure, few evaluations have included an examination of resident’s housing environment and the quality of life in the community, particularly from the perspective of the residents themselves. This paper describes such an evaluation. The study’s first objective was to ascertain those housing environment characteristics that are most strongly related to residents’ perceived quality of life. To accomplish this objective, data from 34 current and former psychiatric patients living in either a transitional or long-term group home or a co-operative apartment were collected on measures of resident control, staff management practices, network size and social support, and quality of life. The second objective was to examine the impact of supportive housing programs on residents’ adaptation to community living. To meet this objective, a retrospective pre-test post-test design was used to compare changes in residents’ rates of rehospitalization, educational and/or vocational involvement, and staff’s perceptions of residents’ level of independent functioning since living in residence. Results indicated that shared control over decision-making within the home and a democratic management style were significantly related to various aspects of residents’ perceived quality of life. Furthermore, a significant improvement in residents’ level of adaptive functioning and instrumental role involvement, as well as a significant decrease in the frequency and duration of hospitalizations, were observed. Additional factors which were significant in terms of residents’ descriptions of their quality of life include the need for acceptance, competence, privacy, friendship and support, and employment or meaningful activity. The implications of this study highlight both the importance and validity of self-report data with this segment of the population. Recommendations for the programs, limitations of the study, and suggestions for future research are discussed

    Midwives\u27 knowledge, attitudes and learning needs regarding antenatal vaccination

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    Objective: To determine the knowledge, attitudes and learning needs of midwives regarding antenatal vaccination. Design & Setting: A cross-sectional, paper-based survey of midwives employed at the only public tertiary maternity hospital in the Australian state of XX between November 2015 and July 2016. Participants: 252 midwives providing care in antepartum, intrapartum, and/or postpartum settings. Measurements: Self-reported responses to a 41-item survey. Findings: The vast majority of midwives supported influenza and pertussis vaccination for pregnant women, with 90.0% and 71.7% reporting they would recommend pertussis and influenza vaccine, respectively, to a pregnant friend or family member, and almost all stating that midwives should administer vaccines to pregnant patients (94.8%). Seven out of ten midwives (68.1%) responded correctly to all knowledge items regarding vaccines recommended during pregnancy; 52.8% demonstrated correct knowledge regarding vaccine administration despite only 36.6% having attended an education session on antenatal vaccination in the previous two years. Nearly all midwives (97.3%) expressed a need for more education on vaccine administration. The most commonly reported barrier to administering influenza (61.3%) and pertussis (59.0%) vaccination was having staff available with the certification required to administer vaccines. Key Conclusions: Midwives view antenatal vaccination as their responsibility and are interested and receptive to education. Implications for Practice: There is an unmet need and demand among midwives for professional development that would enable them to recommend and administer vaccines to pregnant women in accordance with national immunisation guidelines and integrate vaccination into routine antenatal care

    School attrition and dropout recovery ameliorated by literacy, engagement, and resilience

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    The purpose of this study was to investigate factors and feelings that contribute to students leaving school and later returning to adult education programs to attain a General Educational Development (GED) credential. This process was found to be ameliorated by the positive factors of literacy, engagement, and resilience. These factors were selected because of their importance to the success of the schooling process and their interrelatedness. When these factors were self-reported at low levels combined with negative social circumstances, it was much more difficult for students to avoid school attrition or to reengage in dropout recovery. An explanatory sequential mixed methods research design was employed with an emancipatory lens facilitated by a supportive listener, as researcher, to examine the voices of a disadvantaged population of high school dropouts who shared their educational journeys and reconnection to school. These personal reports were given through the use of the Survey of Adolescent Reading Attitudes (SARA), The Resilience Scale for Adolescents (READ), and ethnographic interviews. Students felt that the inherent value of a high school credential was equally as important as the desire to garner employment. Literacy, they believed, was a protective factor as a skill that was an early-developed asset; however, that ability alone could not help them prevail in view of overwhelming personal roadblocks and ever increasing complex content material. Literacy skills did help reassure students of the possibility of success when finding a good dropout recovery program to obtain a GED. Students’ self-determination, through engagement and resilience, revealed an intrinsic feeling of wanting to reach the educational goal for “myself.” A significant link between reading attitudes and resilience was demonstrated in a correlation study with the two established assessment scales

    A GALEX Ultraviolet Imaging Survey of Galaxies in the Local Volume

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    We present results from a GALEX ultraviolet (UV) survey of a complete sample of 390 galaxies within ~11 Mpc of the Milky Way. The UV data are a key component of the composite Local Volume Legacy (LVL), an ultraviolet-to-infrared imaging program designed to provide an inventory of dust and star formation in nearby spiral and irregular galaxies. The ensemble dataset is an especially valuable resource for studying star formation in dwarf galaxies, which comprise over 80% of the sample. We describe the GALEX survey programs which obtained the data and provide a catalog of far-UV (~1500 Angstroms) and near-UV (~2200 Angstroms) integrated photometry. General UV properties of the sample are briefly discussed. We compute two measures of the global star formation efficiency, the SFR per unit HI gas mass and the SFR per unit stellar mass, to illustrate the significant differences that can arise in our understanding of dwarf galaxies when the FUV is used to measure the SFR instead of H-alpha. We find that dwarf galaxies may not be as drastically inefficient in coverting gas into stars as suggested by prior H-alpha studies. In this context, we also examine the UV properties of late-type dwarf galaxies that appear to be devoid of star formation because they were not detected in previous H-alpha narrowband observations. Nearly all such galaxies in our sample are detected in the FUV, and have FUV SFRs that fall below the limit where the H-alpha flux is robust to Poisson fluctuations in the formation of massive stars. The UV colors and star formation efficiencies of H-alpha-undetected, UV-bright dwarf irregulars appear to be relatively unremarkable with respect to those exhibited by the general population of star-forming galaxies.Comment: submitted to ApJS, revised per referee's comments; accepted Oct. 30 w/o further revision; 37 pages; figure 6 omitted due to size; figure available from http://users.obs.carnegiescience.edu/jlee/paper

    Predictors of quality of care in mental health supported accommodation services in England: a multiple regression modelling study.

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    BACKGROUND: Specialist mental health supported accommodation services are a key component to a graduated level of care from hospital to independently living in the community for people with complex, longer term mental health problems. However, they come at a high cost and there has been a lack of research on the quality of these services. The QuEST (Quality and Effectiveness of Supported tenancies) study, a five-year programme of research funded by the National Institute for Health Research, aimed to address this. It included the development of the first standardised quality assessment tool for supported accommodation services, the QuIRC-SA (Quality Indicator for Rehabilitative Care - Supported Accommodation). Using data collected from the QuIRC-SA, we aimed to identify potential service characteristics that were associated with quality of care. METHODS: Data collected from QuIRC-SAs with 150 individual services in England (28 residential care, 87 supported housing and 35 floating outreach) from four different sources were analysed using multiple regression modelling to investigate associations between service characteristics (local authority area index score, total beds/spaces, staffing intensity, percentage of male service users and service user ability) and areas of quality of care (Living Environment, Therapeutic Environment, Treatments and Interventions, Self-Management and Autonomy, Social Interface, Human Rights and Recovery Based Practice). RESULTS: The local authority area in which the service is located, the service size (number of beds/places) and the usual expected length of stay were each negatively associated with up to six of the seven QuIRC-SA domains. Staffing intensity was positively associated with two domains (Therapeutic Environment and Treatments and Interventions) and negatively associated with one (Human Rights). The percentage of male service users was positively associated with one domain (Treatments and Interventions) and service user ability was not associated with any of the domains. CONCLUSIONS: This study identified service characteristics associated with quality of care in specialist mental health supported accommodation services that can be used in the design and specification of services

    Nebular Attenuation in H\alpha-selected Star-forming Galaxies at z=0.8 from the NewH\alpha\ Survey

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    We present measurements of the dust attenuation of H\alpha-selected emission-line galaxies at z=0.8 from the NewH\alpha\ narrowband survey. The analysis is based on deep follow-up spectroscopy with Magellan/IMACS, which captures the strong rest-frame optical emission lines from [OII] \lambda 3727 to [OIII] \lambda 5007. The spectroscopic sample used in this analysis consists of 341 confirmed H\alpha\ emitters. We place constraints on the AGN fraction using diagnostics which can be applied at intermediate redshift. We find that at least 5% of the objects in our spectroscopic sample can be classified as AGN and 2% are composite, i.e. powered by a combination of star-formation and AGN activity. We measure the dust attenuation for individual objects from the ratios of the higher order Balmer lines. The H\beta\ and H\gamma\ pair of lines is detected with S/N>5 in 55 individual objects and the H\beta\ and H\delta\ pair is detected in 50 individual objects. We also create stacked spectra to probe the attenuation in objects without individual detections. The median attenuation at H\alpha\ based on the objects with individually detected lines is A(H\alpha)=0.9+-1.0 magnitudes, in good agreement with the attenuation found in local samples of star-forming galaxies. We find that the z=0.8 galaxies occupy a similar locus of attenuation as a function of magnitude, mass and SFR as a comparison sample drawn from the SDSS DR4. Both the results from the individual z=0.8 galaxies and from the stacked spectra show consistency with the mass -- attenuation and SFR -- attenuation relations found in the local Universe, indicating that these relations are also applicable at intermediate redshift.Comment: Submitted to AJ. Revised per referee's comment
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