Place : Classrooms and Cyberspace--A Discourse Analysis of How Place Shapes Interaction and Learning

This is a cross-environmental study focusing on how interactants in two distinct learning settings communicate and engage in course-related planning and problem solving-activities as members of their particular academic community. One setting is a face-to-face class; the second is the identical course offered on-line. The primary methodological approach is discourse analysis

Holding Death at Bay vs. Prolonging Life: Indexing Fatalism and Optimism in the Ideology of Health, Genetics, and Family History in the U. S. and South Korean Media

Media discourse creates and shapes views of personhood, of possibilities, of wellness, and at the same time, these views and beliefs, in their turn, shape media discourse. Broadcasts of health-related edutainment programs and advertisements are rich sources for the discovery of stances concerning health and illness. We examine media discourse in the United States and South Korea, and uncover consistent indexical patterns pointing to overall ideologies of fatalism in the U.S. and optimism in South Korea. Specifically, from an indexicality-based perspective, we identify the patterned ways in which the ideologies of fatalism and optimism are indexed with regard to agency and stance. We provide evidence of the culturally distinct patterns of discourse that construct health and illness in the U.S. and South Korean media. In the U.S., heart disease and cancer are threats, medicines are omnipotent, and physicians, omniscient. “Death” is explicit and medicines and physicians hold it at bay. Korean discourse frames “life” as explicit underscoring efforts by doctors and medicines to prolong and enhance it. Implications associated with public health discourses employing diverse discursive strategies are discussed

Early hearing intervention and support services provided to the paediatric population by South African audiologists

With the introduction of universal newborn hearing screening (UNHS) the need for quality early hearing intervention (EHI) services became critical. Screening is but the avenue to EHI services. Without appropriate intervention infants with hearing loss are at risk for language delay which might subsequently adversely influence academic success and vocational choices later on in life. The numerous socio-economic, cultural and healthcare barriers associated with developing countries such as South Africa, do not negate or diminish the need for optimal outcomes for infants with hearing loss through quality EHI services. The principle of quality EHI services, aligned with international standards, is endorsed by the HPCSA (2003: 2). In order to assure quality in EHI, service evaluation is critical. The necessary first step when evaluating service provision is to measure current service delivery. The main aim of this study was to determine whether South African audiologists provide EHI and support services aligned with international professional best practice to infants following the diagnosis of hearing loss. The first part of this study reviews the evidence available in EHI. The guidelines derived from the international evidence were stated as benchmarks against which South African EHI services were measured. These benchmarks were categorised using the so-called six M variation categories. These categories are: Man, machine (equipment), method (systemaric procedures), measurements, material (amplification devices) and Mother Nature. During the empirical research a descriptive design was followed comprising of questionnaire surveys to audiologists in different working sectors rendering EHI services to infants with hearing loss. The questionnaire survey explored the nature and scope of the EHI services offered to infants with hearing loss with regard to all the components (categorised in the six M categories) of the EHI programme of 40 South African audiologists. The results of this study indicate that respondents often do not use evidence-based measurements or methods during EHI services. Results suggest that undergraduate training in areas regarding the selection and fitting of amplification to infants with hearing loss is often inadequate (>20 respondents indicated that they are not trained). Evidence-based measurements are not typically performed when fitting amplification to infants (29 respondents do not perform probe-microphone or elctroacoustic measurements). Many respondents indicated that they do not have the necessary equipment to do these measurements. EHI services often (50% of respondents) do not provide A/R directly, but refer to other team members. From the results there seems to be significant delays in the rendering of EHI services to infants with hearing loss. Financial constraints of the family of the infants, accessibility problems, as well as a lack of infant support from their families often influence the EHI programmes of respondents. The implications of this study were discussed. Recommendations include the development of South African guidelines, aligned with international guidelines but taking into account the challenges posed by the unique South African context. Other recommendations include: Centres of excellence, relevant continuing education programmes and the evaluation of undergraduate training programmes.Dissertation (M (Communication Pathology))--University of Pretoria, 2006.Speech-Language Pathology and AudiologyM (Communication Pathology)unrestricte

Noise-induced hearing loss : prevalence, degree and impairment criteria in South African gold miners

Despite the preventability of noise-induced hearing loss (NIHL) a high prevalence is still reported in South African mines. The study aimed to describe the hearing of gold miners pertaining to the prevalence and degree of NIHL and effectiveness of current RSA impairment criteria to identify NIHL. The audiological data, collected between 2001 and 2008, of 57 714 mine workers were investigated in this retrospective cohort study. Data was accessed through the mine’s electronic database and exported to Microsoft Excel 2007 worksheets. Participants were categorised in terms of noise exposure (level and working years), age, race and gender. Noise exposure levels were described in terms of a specific occupation and categorized into four groups based on dosimeter data received from the mine’s noise hygienist, namely: 1) Below surface (underground) noise exposure, ≥85 dB A, classified according to the South African regulations on the daily permissible dose of noise exposure8, named Noise Group 1; 2) Surface noise exposure, ≥85 dB A, named Noise Group 2; 3) No known occupational noise exposure, named control group; and 4) Uncertain levels of noise exposure, e.g. students and trainees, named Noise Group 4. The control group was matched with participants of noise group 1 and 2 based on gender, race and age at the most recent audiogram test. Descriptive and inferential statistics were employed. Measures of central tendency and variability were used with analysis of covariance (ANCOVA) and pairwise comparisons according to Fisher’s Least Squares Differences Approach (F test). Results indicated that noise exposed groups had significantly higher prevalence of high and low frequency hearing loss than the control group. High-frequency hearing loss was also present in the control group. The greatest differences in prevalence of hearing loss were observed at 3, 4 kHz and age group 36 to 45 years. Thresholds at 8 kHz were worse than expected and decline slowed down with age. High-frequency thresholds showed a non-linear growth pattern with age with a greater decline at 2 kHz with age in the noise-exposed population compared to the control group. Hearing deteriorated more across age groups with more noise-exposed years, and this deterioration was most visible after 10 to 15 working years and at 3 kHz. Females had better hearing than males across the frequency spectrum. Black males had significantly better high-frequency hearing than white males but significantly worse low-frequency hearing than white male counterparts. PLH values showed poor correlation (through statistical analyses) with other well-accepted hearing impairment criteria. To date this was the largest study conducted on the hearing of gold miners and the sample included a very large number of black males exposed to occupational noise (N=17 933). Values supplied in distribution table format are therefore unique and contribute greatly to the knowledge base.Thesis (PhD)--University of Pretoria, 2012.Speech-Language Pathology and Audiologyunrestricte

Science Communication Versus Science Education: The Graduate Student Scientist As A K-12 Classroom Resource

Science literacy is a major goal of science educational reform (NRC, 1996; AAAS, 1998; NCLB Act, 2001). Some believe that teaching science only requires pedagogical content knowledge (PCK) (Shulman, 1987). Others believe doing science requires knowledge of the methodologies of scientific inquiry (NRC, 1996). With these two mindsets, the challenge for science educators is to create models that bring the two together. The common ground between those who teach science and those who do science is science communication, an interactive process that galvanizes dialogue among scientists, teachers, and learners in a rich ambience of mutual respect and a common, inclusive language of discourse (Stocklmayer, 2001). The dialogue between science and non-science is reflected in the polarization that separates those who do science and those who teach science, especially as it plays out everyday in the science classroom. You may be thinking, why is this important? It is vital because, although not all science learners become scientists, all K-12 students are expected to acquire science literacy, especially with the implementation of the No Child Left Behind Act of 2001 (NCLB). Students are expected to acquire the ability to follow the discourse of science as well as connect the world of science to the context of their everyday life if they plan on moving to the next grade level, and in some states, to graduate from high school. This paper posits that science communication is highly effective in providing the missing link for K-12 students’ cognition in science and their attainment of science literacy. This paper will focus on the “Science For Our Schools” (SFOS) model implemented at California State University, Los Angeles (CSULA) as a project of the National Science Foundation’s GK-12 program, (NSF 2001) which has been a huge success in bridging the gap between those who “know” science and those who “teach” science. The SFOS model makes clear the distinctions that identify science, science communication, science education, and science literacy in the midst of science learning by bringing together graduate student scientists and science teachers to engage students in the two world’s dialogue in the midst of the school science classroom. The graduate student scientists and the science teachers worked as a team throughout the school year and became effective science communicators as they narrowed the gulf between the two worlds

The lesbian, gay, bisexual and transgender community online: discussions of bullying and self-disclosure in YouTube videos

Computer-mediated communication has become a popular platform for identity construction and experimentation as well as social interaction for those who identify as lesbian, gay, bisexual or transgender (LGBT). The creation of user-generated videos has allowed content creators to share experiences on LGBT topics. With bullying becoming more common amongst LGBT youth, it is important to obtain a greater understanding of this phenomenon. In our study, we report on the analysis of 151 YouTube videos which were identified as having LGBT- and bullying-related content. The analysis reveals how content creators openly disclose personal information about themselves and their experiences in a non-anonymous rhetoric with an unknown public. These disclosures could indicate a desire to seek friendship, support and provide empathy

Determining postdischarge needs of South African parents with premature infants

This study explored the information and support needs of South African parents with premature infants after the initial discharge home from the hospital setting. Asynchronous online focus groups on the Facebook platform were utilized to identify the caregiving needs expressed by 25 South African parents with premature infants and to inform a parent support program in South Africa. The findings concluded that South African parents have unfulfilled information and support needs regarding their caregiving for their premature infants and their overall well-being.The University of Pretoriahttp://www.iycjournal.com2022-07-01hj2021Centre for Augmentative and Alternative Communication (CAAC

Type II Quasars from the Sloan Digital Sky Survey: V. Imaging host galaxies with the Hubble Space Telescope

Type II quasars are luminous Active Galactic Nuclei whose centers are obscured by large amounts of gas and dust. In this paper we present 3-band HST images of nine type II quasars with redshifts 0.2 < z < 0.4 selected from the Sloan Digital Sky Survey based on their emission line properties. The intrinsic luminosities of these AGN are estimated to be -24 > M_B > -26, but optical obscuration allows their host galaxies to be studied unencumbered by bright nuclei. Each object has been imaged in three continuum filters (`UV', `blue' and `yellow') placed between the strong emission lines. The spectacular, high quality images reveal a wealth of details about the structure of the host galaxies and their environments. Six of the nine galaxies in the sample are ellipticals with de Vaucouleurs light profiles, one object has a well-defined disk component and the remaining two have marginal disks. Stellar populations of type II quasar hosts are more luminous (by a median of 0.3-0.7 mag, depending on the wavelength) and bluer (by about 0.4 mag) than are M* galaxies at the same redshift. When smooth fits to stellar light are subtracted from the images, we find both positive and negative residuals that become more prominent toward shorter wavelengths. We argue that the negative residuals are due to kpc-scale dust obscuration, while most positive residuals are due to the light from the nucleus scattered off interstellar material in the host galaxy. Scattered light makes a significant contribution to the broad band continuum emission and can be the dominant component of the extended emission in the UV in extreme cases.Comment: 51 pages, including 12 grey scale figures, 4 color figures, 5 tables. In press in AJ. Version with higher-resolution images available at http://www.astro.princeton.edu/~nadia/qso2.html. (Minor changes in response to the referee report