Foreign accent syndrome as a developmental motor speech disorder

Introduction: Foreign Accent Syndrome (FAS) is a relatively rare motor speech disorder in which the pronunciation of a patient is perceived by listeners of the same language community as distinctly foreign. FAS has been well documented in adult patients with etiologically heterogeneous, though mostly vascular brain lesions affecting the motor speech network of the language dominant hemisphere. In addition, reports exist of adult patients in whom FAS was due to a psychiatric illness. Although FAS has been reported in children, such accounts are rare and have remained largely anecdotal in that there have been no formally documented cases of FAS as a developmental motor speech disorder. Methods and results: For the first time, we describe the clinical, cognitive and neurolinguistic findings in two patients who in the absence of a history of psychiatric illness or acquired brain damage already presented with FAS at an early stage of speech and language development. In the first patient “developmental FAS” was associated with a dysharmonic distribution of neurocognitive test results indicating slight underdevelopment of visuo-spatial skills and visual memory. The second patient presented with “developmental FAS” associated with specific language impairment (SLI). Independent support for a diagnosis of FAS in both patients was obtained in an accent attribution experiment in which groups of native speakers of (Belgian) Dutch assessed the type of foreign accent of a sample of the patients’ conversational speech. Both patients were judged as non-native speakers of Dutch by the majority of participants who predominantly identified the accent as French. Conclusion: This paper for the first time documents two patients who presented with FAS on a developmental basis. The finding that FAS does not only occur in the context of acquired brain damage or psychogenic illness but also exists as developmental motor speech impairment requires a re-definition of FAS as a clinical syndrome

NASA/American Society for Engineering Education (ASEE) Summer Faculty Fellowship Program 1992

Since 1964, the National Aeronautics and Space Administration (NASA) has supported a program of summer faculty fellowships for engineering and science educators. In a series of collaborations between NASA research and development centers and nearby universities, engineering faculty members spend 10 weeks working with professional peers on research. The Summer Faculty Program Committee of the American Society for Engineering Education supervises the programs. Objectives of the program are (1) to further the professional knowledge of qualified engineering and science faculty members; (2) to stimulate and exchange ideas between participants and NASA; (3) to enrich and refresh the research and teaching activities of participants' institutions; and (4) to contribute to the research objectives of the NASA center

Radiographic markers of hip dysplasia in young adults: predictive effect of factors in early life

Background and objectives Acetabular dysplasia in young adults occurs, despite screening for developmental hip dysplasia (DDH) in the neonatal period. We aimed to examine how early life factors predict radiographic measurements of acetabular dysplasia at 18–19 years of age. Methods From a previous randomized trial (n=12,014; 1988–90) evaluating the role of hip ultrasound in newborn screening of DDH, 4469 participants (2193 males) were invited to a follow-up 18 years later (2007–09), of which 2370 (53% attendance; 932 males) met. We examined associations between early life factors and four radiographic measurements for acetabular dysplasia at skeletal maturity. Hierarchical regressions, with addition of variables observed/ measured consecutively in time, were analyzed using mixed efects models considering hip as the unit in the analyses. The study is approved by the Regional Ethics Committee. Results In total, 2340 participants (921 boys), mean age 18.7 years, (SD 0.6) had hip radiographs performed at followup and were included. Early life factors signifcantly predicting radiographic acetabular dysplasia at age 18–19-years included female gender, breech, low acetabular inclination (alpha) angle and sonographic instability, abduction treatment, as well as the velocity of growth during childhood. A positive family history of DDH was not associated with acetabular dysplasia at skeletal maturity. Conclusion The acetabular inclination (alpha) angle as measured on ultrasound at birth turned out to be a signifcant predictor of dysplasia at 18–19 years of age. The discordant role of a positive family history in early versus adult hip dysplasia is intriguing, warranting further studies on the genetic mechanisms of DDH

Novel Approach For Hybrid-Multi Level Filter Design For Wireless Applications

Less time and less delay is required for fast processing for filter. The one challenge in processing of image we design a matched filter based algorithm. That is resilient to variation in position determination. The second challenge is to fast process of filter. The match filter works to identify the passion of beam result and compared to that obtaining using the centroiding technique. This process required extra processing time for each beam. So, for fast implementation processing and less delay time we explore the possibility of using a field programming logic array and parallels combination of each delay block to speed up this computation. The second objective can achieve by the parallel hardware used that provides significant performance improvement over processing. This paper describes the development of match filter with less delay and fast processing

Exploring the mediality of live and studio composition: The case of computer music, and its implications in “Ambivalence of Density”

This dissertation attempts to apply the communications theory concept of “mediality,” as described by Jonathan Sterne, to the context of music composition for different mediums, namely the media of the live performance and the studio work (the recording, the concrete work). Mediality denotes the complex “web of practice and reference” between different media—how we interact with and perceive media, and how this affects the content of the medium. The mediality of live and studio composition is posited as cross-referential, non-hierarchical and non-dichotomous—a relationship of “dependence and imbrication” rather than antagonistic binaries. I investigate the mediality of live and studio composition in three ways: historically, through the discourses surrounding gramophony in the early twentieth century and rock aesthetic in the late twentieth century; technologically, by describing how the computer evokes mediatic cultures and practices through software, and how this is informed by sociocultural discourse; and creatively, through my own suite of live and studio compositions entitled “Ambivalence of Density,” with discussions about the processes involved and how I’ve attempted to underscore mediatic discourse in the works. I conclude by suggesting that a broader understanding of the mediality of music (and sound in general) could make the dialogue surrounding new musical media (especially Internetbased media) more articulate and relevant

Timbre hybridization processes and strategies. A Portfolio of Compositions

This document describes the processes and development of my compositional work, particularly concerning the introduction of modifications of timbral qualities, including combinations, and hybridization procedures. It describes compositional ethodologies, developed within a technological environment, and the interrelation between theoretical thought and computational approach. The following chapters present time, frequency, and timbre as materials of investigation, analysis, and re-composition, through real time electroacoustic strategies and treatments. The preparation and design of specific software, through the utilization of programming language Max/MSP Jitter, will illustrate the computational approach to composing, its inner correspondence with the theoretical approach, and interconnections with preparation and performing activity. Procedures progressively applied to the portfolio of compositions are presented in the final chapters of the document. The portfolio consists of six works completed during the last six years, for instruments and real time electronic treatment, presented as a CD with the complete recordings of three compositions, four scores, and a DVD, containing video recording of two works. The last three compositions presented are also part of a cycle of works –still in progress- dedicated to the whole instrumental spectrum, in which the voice represents the physical-musical material of each work

Prosody and Wavelets: Towards a natural speaking style conversion

Speech is the basis of human communication: in everyday life we automatically decode speech into language regardless of who speaks. In a similar way, we have the ability to recognize di erent speakers, despite the linguistic content of the speech. Additionally to the voice individuality of the speaker, the particular prosody of speech involves relevant information concerning the identity, age, social group or economical status of the speaker, helping us identify the person to whom we are talking without seeing the speaker. Voice conversion systems deal with the conversion of a speech signal to sound as if it was uttered by another speaker. It has been an important amount of work in the conversion of the timber of the voice, the spectral features, meanwhile the conversion of pitch and the way it temporarily evolves, modeling the speaker dependent prosody, is mostly achieved by just controlling the level and range. This thesis focuses on prosody conversion, proposing an approach based on a wavelet transformation of the pitch contours. It has been performed a study of the wavelet domain, discerning among the di erent timing of the prosodic events, thus allowing an improved modeling of them. Consequently, the prosody conversion is achieved in the wavelet domain, using regression techniques originally developed for the spectral features conversion, in voice conversion systems

Dynamic Reconstruction and Multivariable Control for Force-Actuated, Thin Facesheet Adaptive Optics

The Multiple Mirror Telescope (MMT) under development at the University of Arizona takes a new approach in adaptive optics placing a large (0.65 m) force-actuated, thin facesheet deformable mirror at the secondary of an astronomical telescope, thus reducing the effects of emissivity which are important in IR astronomy. However, The large size of the mirror and low stiffness actuators used drive the natural frequencies of the mirror down into the bandwidth of the atmospheric distortion. Conventional adaptive optics takes a quasi-static approach to controlling the, deformable mirror. However, flexibility within the control bandwidth calls for a new approach to adaptive optics. Dynamic influence functions are used to characterize the influence of each actuator on the surface of the deformable mirror. A linearized model of atmospheric distortion is combined with dynamic influence functions to produce a dynamic reconstructor. This dynamic reconstructor is recognized as an optimal control problem. Solving the optimal control problem for a system with hundreds of actuators and sensors is formidable. Exploiting the circularly symmetric geometry of the mirror, and a suitable model of atmospheric distortion, the control problem is divided into a number of smaller decoupled control problems using circulant matrix theory. A hierarchic control scheme which seeks to emulate the quasi-static control approach that is generally used in adaptive optics is compared to the proposed dynamic reconstruction technique. Although dynamic reconstruction requires somewhat more computational power to implement, it achieves better performance with less power usage, and is less sensitive than the hierarchic technique