THE GERMINATION OF TRANSLANGUAGING: IN AND OUTSIDE THE SCHOOL CONTEXT

In 1994, the term translanguaging emerged in the Welsh secondary schools. Its first use is attributed to Cen Williams who referred to this pedagogical practice as receiving the input in one language and producing in a different one. Translated later by Colin Baker, translanguaging has been extended to the scholarly literature to entrench, and become part of various educational and social domains. Pedagogical translanguaging is the name given to the language practice that takes place in the classroom context, while non-pedagogical translanguaging is the umbrella term for the bilinguals’ practices inside and outside the educational settings. Though the word translanguaging is frequently used in the literature, there is no exact definition to it, so the interest in this current language practice resulted in many definitions. This paper begins by reviewing the origins of translanguaging as well as its development from educational settings to outside the classroom then returning to the school. Furthermore, as translanguaging is controversial, the discrepancy between translanguaging and the different teaching and learning approaches and methods will be scrutinised to make a distinction between translanguaging and the use of the students’ home language. This can be better understood by explaining the notion of approach and how such a language practice can fall under the name of a teaching approach

Male Circumcision; Willingness to undergo Safe Male Circumcision and HIV Risk Behaviors among Men in Botswana

This paper uses data from the 2008 Botswana AIDS Impact Survey to explore the association between male circumcision or willingness to undergo safe male circumcision, and men’s sexual and HIV risk behaviours in Botswana. Bivariate and multivariate regression analysis techniques are used. The results show that being circumcised, or expressing willingness to be circumcised, was associated with significant increase in the likelihood of having two or more current sexual partners, and having had sex with multiple partners during the year leading to the survey, even after controlling for confounding variables. There is a need for further research to examine the association between male circumcision and men’s sexual practices in Botswana. Such context specific research will provide the necessary evidence base for HIV prevention and impact mitigation programs, interventions and strategies and to provide rigorous estimates of the extent men’s sexual risk compensation and ‘sexual disinhibition’  associated with the reduced risk of HIV infection accorded by safe male circumcision. Current efforts to promote male circumcision as an integral part of the country’s HIV prevention and control strategy need to be accompanied by continuous education to address myths and misconceptions relating to safe male circumcision

Quantization of automatic speech recognition networks

Recently, end-to-end neural networks based speech recognition systems have received great interests in the speech community. Although these systems offer a wide range of advantages such as high performance, they often rely on a neural network with a large number of parameters, i.e. large memory footprint and large decoding time. The main goal of this thesis is investigation of quantized neural networks for end-to-end speech recognition systems. Different quantization methods like post training quantization, scalar quantization, iterative product quantization and quantization aware training are investigated in this thesis on ASR model. By doing so, the final system is 3.7 times smaller than the baseline system, faster in decoding with a speedup factor of 1.19 and with almost same level of recognition performance

Men, masculinities and sexual and reproductive health in Botswana.

This thesis investigates the role of masculinities on men’s sexual and reproductive health in Botswana. Botswana is currently in the throes of a severe heterosexually driven HIV/AIDS epidemic that has eroded some of the developmental gains the country had achieved since independence. A unique feature of Botswana’s HIV epidemic is the rapid and phenomenal increase in infection and prevalence rates in the face of good levels of knowledge of HIV prevention and an early and comprehensive HIV prevention strategy that guaranteed access to free HIV prevention and treatment services, including ARV treatment. The lack of effectiveness of the country’s HIV efforts and subsequent increase in infection rates have been blamed on men’s risky sexual behavior and lack of support of their partners’ decisions to utilize these services. In fact, quantitative studies on men’s sexual behavior and HIV such as the Botswana AIDS Impact Surveys show that men are less likely to use VCT services and more likely to engage in risky sexual behavior that increases risk of HIV infection to themselves and their partners. While studies provide the evidence that implicates men in the rapid growth Botswana’s HIV epidemic, the studies provide little or no explanation of factors that motivate men’s behavior in reproductive health. This lack of insights on factors that motivate men’s behavior leads to stereotypes about male promiscuity and may contribute to the lack of effectiveness of HIV prevention strategies. The current HIV epidemic has thus thrust heterosexual masculinities at the centre of HIV prevention efforts and provides an opportunity for research to interrogate the role of heterosexual masculinities in reproductive health, especially HIV transmission and prevention. The thesis employs qualitative data to provide in-depth appreciation of the prevalent masculine norms and beliefs and to highlight contextual factors and processes that shape and give rise to various masculinities. It further uses quantitative data to provide measures of levels of men’s masculine and gender role beliefs that may influence HIV prevention and transmission and to test the association between masculinities and men’s sexual and reproductive health attitudes and practices. The results show that men’s sense of identity is socially constructed, and revolves around the notion of superiority to women, independence and having and being in control of the family. However, men face many challenges to the realization of this masculine ideal. Men’s perceived difficulty or failure to live up to socially constructed Men, Masculinities and Sexual and Reproductive Health in Botswana vii notions of masculinities affects their experience of sexual and reproductive health programs, especially women’s empowerment and HIV prevention programs. By their nature, these programs tend to challenge men’s dominance of women’s decision on sexuality, and are therefore experienced as a threat to some men’s sense of identity. Quantitative results indicate an association between masculinities and sexual and reproductive health. While men’s sense of masculinities is not the overriding factor determining their sexual and reproductive health attitudes and practices, the results show a strong association traditional masculine beliefs and negative sexual and reproductive health beliefs and practices. However, there is also strong evidence that men and masculinities are responding to contextual factors, such as the HIV epidemic, which has become a specific stress on the local construction of masculinities. In focus group discussions, many men challenged traditional masculine norms, beliefs and practices that increase their vulnerability to HIV infection and those that either encourage or condone violence within intimate relationships. Significantly high proportions of men had positive attitudes towards HIV prevention programs. It is evident that now more than ever (and thanks to the HIV/AIDS epidemic) many men are ready to question the predominant masculine norms, beliefs and practices that increase their vulnerability to infection and disease. These voices of change represent a window of opportunity for research and programs can meaningfully engage with men and masculinities on issues of sexuality, gender roles, sexual and reproductive health and HIV/AIDS prevention and transmission. There is need for future research and interventions to move away from focusing exclusively on individual models of preventive health behaviors to more multilevel, cultural and contextual explanations. Taking account of multilevel, cultural and contextual factors that shape masculinities and men’s sense of identity will ensure increased effectiveness of sexual and reproductive health programs, especially HIV/AIDS prevention programs. On the other hand, failure to account for cultural and contextual factors that shape individuals’ behavior will only ensure that the shortcomings of such intervention program will continue to be blamed on the individual

Ultra-lightweight Neural Differential DSP Vocoder For High Quality Speech Synthesis

Neural vocoders model the raw audio waveform and synthesize high-quality audio, but even the highly efficient ones, like MB-MelGAN and LPCNet, fail to run real-time on a low-end device like a smartglass. A pure digital signal processing (DSP) based vocoder can be implemented via lightweight fast Fourier transforms (FFT), and therefore, is a magnitude faster than any neural vocoder. A DSP vocoder often gets a lower audio quality due to consuming over-smoothed acoustic model predictions of approximate representations for the vocal tract. In this paper, we propose an ultra-lightweight differential DSP (DDSP) vocoder that uses a jointly optimized acoustic model with a DSP vocoder, and learns without an extracted spectral feature for the vocal tract. The model achieves audio quality comparable to neural vocoders with a high average MOS of 4.36 while being efficient as a DSP vocoder. Our C++ implementation, without any hardware-specific optimization, is at 15 MFLOPS, surpasses MB-MelGAN by 340 times in terms of FLOPS, and achieves a vocoder-only RTF of 0.003 and overall RTF of 0.044 while running single-threaded on a 2GHz Intel Xeon CPU.Comment: Accepted for ICASSP 202

Voice-preserving Zero-shot Multiple Accent Conversion

Most people who have tried to learn a foreign language would have experienced difficulties understanding or speaking with a native speaker's accent. For native speakers, understanding or speaking a new accent is likewise a difficult task. An accent conversion system that changes a speaker's accent but preserves that speaker's voice identity, such as timbre and pitch, has the potential for a range of applications, such as communication, language learning, and entertainment. Existing accent conversion models tend to change the speaker identity and accent at the same time. Here, we use adversarial learning to disentangle accent dependent features while retaining other acoustic characteristics. What sets our work apart from existing accent conversion models is the capability to convert an unseen speaker's utterance to multiple accents while preserving its original voice identity. Subjective evaluations show that our model generates audio that sound closer to the target accent and like the original speaker.Comment: Submitted to IEEE ICASSP 202

Consensus-Based Technical Recommendations for Clinical Translation of Renal Phase Contrast MRI

BACKGROUND: Phase-contrast (PC) MRI is a feasible and valid noninvasive technique to measure renal artery blood flow, showing potential to support diagnosis and monitoring of renal diseases. However, the variability in measured renal blood flow values across studies is large, most likely due to differences in PC-MRI acquisition and processing. Standardized acquisition and processing protocols are therefore needed to minimize this variability and maximize the potential of renal PC-MRI as a clinically useful tool. PURPOSE: To build technical recommendations for the acquisition, processing, and analysis of renal 2D PC-MRI data in human subjects to promote standardization of renal blood flow measurements and facilitate the comparability of results across scanners and in multicenter clinical studies. STUDY TYPE: Systematic consensus process using a modified Delphi method. POPULATION: Not applicable. SEQUENCE FIELD/STRENGTH: Renal fast gradient echo-based 2D PC-MRI. ASSESSMENT: An international panel of 27 experts from Europe, the USA, Australia, and Japan with 6 (interquartile range 4–10) years of experience in 2D PC-MRI formulated consensus statements on renal 2D PC-MRI in two rounds of surveys. Starting from a recently published systematic review article, literature-based and data-driven statements regarding patient preparation, hardware, acquisition protocol, analysis steps, and data reporting were formulated. STATISTICAL TESTS: Consensus was defined as ≥75% unanimity in response, and a clear preference was defined as 60–74% agreement among the experts. RESULTS: Among 60 statements, 57 (95%) achieved consensus after the second-round survey, while the remaining three showed a clear preference. Consensus statements resulted in specific recommendations for subject preparation, 2D renal PC-MRI data acquisition, processing, and reporting. DATA CONCLUSION: These recommendations might promote a widespread adoption of renal PC-MRI, and may help foster the set-up of multicenter studies aimed at defining reference values and building larger and more definitive evidence, and will facilitate clinical translation of PC-MRI. LEVEL OF EVIDENCE: 1 TECHNICAL EFFICACY STAGE: