Training AAC users in user-centred design

User-centred design (UCD) with a focus on usability provides product developers with a design approach in which users are involved in every stage of the process: when gathering requirements; when evaluating alternative designs; and when evaluating interactive prototypes.The characteristics of people who use augmentative and alternative communication (AAC) make it difficult to follow a truly UCD approach, which in part may contribute to the high rejection of AAC devices. Training workshops have been delivered to introduce users and AAC professionals to the UCD process.Initial feedback indicates that they feel more empowered to evaluate systems and to engage in the design of new systems after attending the workshop.

AAC and Australian speech pathologists: a report on a national survey

A total of 971 speech pathologists from across Australia participated in a survey that investigated their knowledge of augmentative and alternative communication (AAC), their AAC practices, the AAC resources available to them, and their preferred format for further education. The results indicated that 98% of respondents had at least some knowledge of AAC and only 13% never recommended AAC in their practice. However, 29% had recommended a device they had never seen and 36% indicated that they would not recommend AAC for a client who was presymbolic. Access to resources appeared to be related to the location of respondents in relation to a capital city. Overall, there appeared to be a lack of AAC expertise within the profession in Australia. A lack of interest in obtaining further information on AAC and an unwillingness to enroll in further education highlighted the need for collaboration among the professional organization, training institutions, and employment bodies in ensuring adequate levels of knowledge and skills among speech pathologists.

Parents' perspectives on tele-AAC support for families with a new speech generating device: results from an Australian pilot study

Telepractice is rapidly gaining popularity as a cost-effective and convenient alternative to in-person services for a range of speech-language pathology (SLP) applications. To date, there has been little research investigating the use of telepractice to support families with a new speech generating device (SGD). This paper reports on the outcomes of a novel online training and support program, trialed with 4 underserviced Australian families of children with a new SGD. The program consisted of 6 video-narrated lessons on SGD use, along with an online supervision and practice component conducted via videoconference. Semistructured interviews were undertaken with parents following their completion of the program. Parents noted the telepractice support model offered a range of benefits, including convenient service access and flexible learning options. Challenges included technology limitations and increased pressure on parents to coordinate home practice. Overall, parents reported that the telepractice program was a positive experience for them and their children. Findings indicated that telepractice is a promising mode of service delivery for those learning to use a new SGD. Further research in this area is warranted.

Study of the audio coding algorithm of the MPEG-4 AAC standard and comparison among implementations of modules of the algorithm

Audio coding is used to compress digital audio signals, thereby reducing the amount of bits needed to transmit or to store an audio signal. This is useful when network bandwidth or storage capacity is very limited. Audio compression algorithms are based on an encoding and decoding process. In the encoding step, the uncompressed audio signal is transformed into a coded representation, thereby compressing the audio signal. Thereafter, the coded audio signal eventually needs to be restored (e.g. for playing back) through decoding of the coded audio signal. The decoder receives the bitstream and reconverts it into an uncompressed signal. ISO-MPEG is a standard for high-quality, low bit-rate video and audio coding. The audio part of the standard is composed by algorithms for high-quality low-bit-rate audio coding, i.e. algorithms that reduce the original bit-rate, while guaranteeing high quality of the audio signal. The audio coding algorithms consists of MPEG-1 (with three different layers), MPEG-2, MPEG-2 AAC, and MPEG-4. This work presents a study of the MPEG-4 AAC audio coding algorithm. Besides, it presents the implementation of the AAC algorithm on different platforms, and comparisons among implementations. The implementations are in C language, in Assembly of Intel Pentium, in C-language using DSP processor, and in HDL. Since each implementation has its own application niche, each one is valid as a final solution. Moreover, another purpose of this work is the comparison among these implementations, considering estimated costs, execution time, and advantages and disadvantages of each one.

The first report of the qnrB19, qnrS1 and aac(6 ')-Ib-cr genes in urinary isolates of ciprofloxacin-resistant Escherichia coli in Brazil

In this study, we investigated the presence of plasmid-mediated quinolone resistance (PMQR) genes among 101 ciprofloxacin-resistant urinary Escherichia coli isolates and searched for mutations in the quinolone-resistance-determining regions (QRDRs) of the DNA gyrase and topoisomerase IV genes in PMQR-carrying isolates. Eight isolates harboured the qnr and aac(6')-Ib-cr genes (3 qnrS1, 1 qnrB19 and 4 aac(6')-Ib-cr). A mutational analysis of the QRDRs in qnr and aac(6')-Ib-cr-positive isolates revealed mutations in gyrA, parC and parE that might be associated with high levels of resistance to quinolones. No mutation was detected in gyrB. Rare gyrA, parC and parE mutations were detected outside of the QRDRs. This is the first report of qnrB19, qnrS1 and aac(6')-Ib-cr-carrying E. coli isolates in Brazil.

Calidad de la carne de cabritos de la Agrupación Caprina Canaria (AAC)

[ES] Para la realización del estudio de la calidad de la carne se utilizaron cuarenta cabritos pertenecientes a la ACC, divididos en cuatro lotes, sobre los cuales se valoró el efecto del tipo de lactancia (natural vs artificial) y del peso sacrificio (6 vs. 10 kg.), controlándose la evolución del pH, color, capacidad de retención de agua, dureza, composición química y fibrilar. La mayor parte de variación entre distintos parámetros es debida al efecto del propio aumento de peso al sacrificio. Como conclusión, el empleo de un lactorreemplazante no afectó negativamente a la calidad químico-física de la carne producida.