Effect of unilateral hearing loss on the speech-evoked auditory brainstem response in the presence of noise

Speech-evoked auditory brainstem responses (ABRs) were acquired in quiet and in the presence of noise at two study sessions to investigate 1) test-retest variability and 2) subcortical representation of speech stimuli. Participants were adults with normal hearing in both ears who listened monaurally and adults with unilateral deafness. Results indicate consistency in responses across sessions and several differences between hearing groups for magnitudes of discrete components.

Representation of Cued Speech in teacher of the deaf and hard of hearing preparation programs

This descriptive study investigates the representation of Cued Speech in teacher of the deaf preparation programs as well as attitudes towards inclusion of Cued Speech in those programs in the context of the 2004 reauthorization of IDEA. The issue of Cued Speech is discussed as a communication modality and implications for deaf education are presented.

El clima laboral como variable estratégica para contribuir al éxito de las organizaciones: estudio del caso de la Fundación Mariana de Jesús (Quito)

En la actualidad todas las organizaciones se ven enmarcadas en un contexto competitivo al cual hay que responder con una serie de estrategias orientadas a satisfacer de mejor manera las expectativas cada vez más marcadas y selectivas de los clientes. Dentro de esta óptica la generación de valor agregado en los diferentes procesos productivos donde el factor humano es vital, es necesario partir de la premisa: “que el contar con Recurso Humano motivado devengará positivamente sus esfuerzos hacia la empresa traduciéndose en eficiencia y eficacia en los procesos productivos”. Es por esta razón que se ha buscado analizar la situación de los colaboradores de la Fundación Mariana de Jesús realizando un Diagnóstico del Clima Laboral que nos permita determinar la influencia ambiental en la motivación de los mismos y conocer cual es la situación actual del clima laboral según una serie de factores definidos para este caso. Además en base a estos resultados se han elaborado recomendaciones y líneas de acción de las debilidades encontradas en la institución mencionada.

La cultura organizacional como variable estratégica para el cambio empresarial: caso Óptica los Andes Cía. Ltda.

Para muchas empresas la cultura organizacional se considera como una estrategia, que puede ser efectiva a la hora de mejorar las condiciones actuales y futuras de las organizaciones, especialmente si éstas se están enfrentando a grandes cambios. Por lo expuesto, el presente trabajo de investigación sobre la cultura organizacional puede convertirse en una herramienta administrativa muy útil para los directivos de la organización. El desarrollo de la investigación tiene cuatro momentos identificados claramente: en el primer capítulo se realiza un análisis teórico, donde se hablará sobre las organizaciones, tipos de estructuras, la cadena de valor y la administración estratégica. En el segundo capítulo hablaremos sobre la cultura organizacional, tipos de culturas y especialmente analizaremos cómo se crea y mantiene una cultura. En el tercer capítulo se aborda el tema sobre el cambio organizacional y finalmente en el cuarto capítulo, se realiza el análisis de las encuestas aplicadas en la empresa Óptica los Andes de la cultura organizacional y estilos de dirección. En el último capítulo se detallan las conclusiones y las recomendaciones para llegar a la cultura organizacional deseada.

La asociación estratégica Unión Europea-América Latina: ¿unas relaciones birregionales con geometría variable? (Tema Central)

Tras quince años de la “asociación estratégica UE-ALC”, los múltiples y profundos cambios en el sistema internacional han tenido gran impacto sobre estas relaciones birregionales. Por ello hay que replantear cuáles son los cambios en la percepciones mutuas de las dos regiones, y observar el nuevo contexto geopolítico, tomando nota de la pérdida de influencia de los EEUU en la región y el auge de Asia, especialmente China. La “asociación estratégica” no ha conducido ni a una convergencia de intereses ni a una reconocible compatibilidad normativa. Además, la UE ha perdido su papel de “modelo” para los procesos de integración, en una región que tiene aún más heterogeneidad por sus diferentes modelos de desarrollo. Por ello se hace necesario asumir una geometría variable para la adaptación de las relaciones birregionales a la realidad del siglo XXI.

Biased representation of disturbance rates in the roadside sampling frame in boreal forests: implications for monitoring design

The North American Breeding Bird Survey (BBS) is the principal source of data to inform researchers about the status of and trend for boreal forest birds. Unfortunately, little BBS coverage is available in the boreal forest, where increasing concern over the status of species breeding there has increased interest in northward expansion of the BBS. However, high disturbance rates in the boreal forest may complicate roadside monitoring. If the roadside sampling frame does not capture variation in disturbance rates because of either road placement or the use of roads for resource extraction, biased trend estimates might result. In this study, we examined roadside bias in the proportional representation of habitat disturbance via spatial data on forest “loss,” forest fires, and anthropogenic disturbance. In each of 455 BBS routes, the area disturbed within multiple buffers away from the road was calculated and compared against the area disturbed in degree blocks and BBS strata. We found a nonlinear relationship between bias and distance from the road, suggesting forest loss and forest fires were underrepresented below 75 and 100 m, respectively. In contrast, anthropogenic disturbance was overrepresented at distances below 500 m and underrepresented thereafter. After accounting for distance from road, BBS routes were reasonably representative of the degree blocks they were within, with only a few strata showing biased representation. In general, anthropogenic disturbance is overrepresented in southern strata, and forest fires are underrepresented in almost all strata. Similar biases exist when comparing the entire road network and the subset sampled by BBS routes against the amount of disturbance within BBS strata; however, the magnitude of biases differed. Based on our results, we recommend that spatial stratification and rotating panel designs be used to spread limited BBS and off-road sampling effort in an unbiased fashion and that new BBS routes be established where sufficient road coverage exists.

Digitisation, representation, and formalisation - Digital libraries of mathematics

One of the main tasks of the mathematical knowledge management community must surely be to enhance access to mathematics on digital systems. In this paper we present a spectrum of approaches to solving the various problems inherent in this task, arguing that a variety of approaches is both necessary and useful. The main ideas presented are about the differences between digitised mathematics, digitally represented mathematics and formalised mathematics. Each has its part to play in managing mathematical information in a connected world. Digitised material is that which is embodied in a computer file, accessible and displayable locally or globally. Represented material is digital material in which there is some structure (usually syntactic in nature) which maps to the mathematics contained in the digitised information. Formalised material is that in which both the syntax and semantics of the represented material, is automatically accessible. Given the range of mathematical information to which access is desired, and the limited resources available for managing that information, we must ensure that these resources are applied to digitise, form representations of or formalise, existing and new mathematical information in such a way as to extract the most benefit from the least expenditure of resources. We also analyse some of the various social and legal issues which surround the practical tasks.

Mechanisms for the land/sea warming contrast exhibited by simulations of climate change

The land/sea warming contrast is a phenomenon of both equilibrium and transient simulations of climate change: large areas of the land surface at most latitudes undergo temperature changes whose amplitude is more than those of the surrounding oceans. Using idealised GCM experiments with perturbed SSTs, we show that the land/sea contrast in equilibrium simulations is associated with local feedbacks and the hydrological cycle over land, rather than with externally imposed radiative forcing. This mechanism also explains a large component of the land/sea contrast in transient simulations as well. We propose a conceptual model with three elements: (1) there is a spatially variable level in the lower troposphere at which temperature change is the same over land and sea; (2) the dependence of lapse rate on moisture and temperature causes different changes in lapse rate upon warming over land and sea, and hence a surface land/sea temperature contrast; (3) moisture convergence over land predominantly takes place at levels significantly colder than the surface; wherever moisture supply over land is limited, the increase of evaporation over land upon warming is limited, reducing the relative humidity in the boundary layer over land, and hence also enhancing the land/sea contrast. The non-linearity of the Clausius–Clapeyron relationship of saturation specific humidity to temperature is critical in (2) and (3). We examine the sensitivity of the land/sea contrast to model representations of different physical processes using a large ensemble of climate model integrations with perturbed parameters, and find that it is most sensitive to representation of large-scale cloud and stomatal closure. We discuss our results in the context of high-resolution and Earth-system modelling of climate change.

A regime-dependent balanced control variable based on potential vorticity

In this paper it is argued that rotational wind is not the best choice of leading control variable for variational data assimilation, and an alternative is suggested and tested. A rotational wind parameter is used in most global variational assimilation systems as a pragmatic way of approximately representing the balanced component of the assimilation increments. In effect, rotational wind is treated as a proxy for potential vorticity, but one that it is potentially not a good choice in flow regimes characterised by small Burger number. This paper reports on an alternative set of control variables which are based around potential vorticity. This gives rise to a new formulation of the background error covariances for the Met Office's variational assimilation system, which leads to flow dependency. It uses similar balance relationships to traditional schemes, but recognises the existence of unbalanced rotational wind which is used with a new anti-balance relationship. The new scheme is described and its performance is evaluated and compared to a traditional scheme using a sample of diagnostics.

The representation of conditional expectations of non-Gaussian noise

For Wiener spaces conditional expectations and $L^{2}$-martingales w.r.t. the natural filtration have a natural representation in terms of chaos expansion. In this note an extension to larger classes of processes is discussed. In particular, it is pointed out that orthogonality of the chaos expansion is not required.