Assessment of the usability of the 'alpha' version of the prototype 'Octopus'-application of the heuristic evaluation model of user's graphic interfaces. 'Evaluación de la utilidad de la versión 'alfa' del prototipo 'Octopus'-uso del modelo de evaluación heurístico de los interfaces gráficos del usuario'.

Resumen basado en el de la publicación

Corporeizaci??n y gram??tica : una propuesta de presentaci??n del contraste por/para en el nivel de usuario b??sico de E/LE

Trabajo de investigaci??n del programa de Doctorado UAM -UNED ???El lenguaje humano: naturaleza, origen y usos??? para la obtenci??n del Diploma de Estudios Avanzados (D.E.A) en Ling????stica aplicada a la ense??anza del espa??ol (2012)

Propuesta curricular de la lengua de signos espa??ola : nivel usuario b??sico A1-A2

Coordinaci??n, Unidad de Pol??tica Ling????stica de la Lengua de Signos Espa??ola (Fundaci??n CNSE) ; edici??n, ??rea de Investigaci??n en Lengua de Signos Espa??ola

Propuesta curricular de la lengua de signos espa??ola : nivel usuario independiente : B1

Esta publicaci??n de la serie de propuestas curriculares para la ense??anza, el aprendizaje y la evaluaci??n de la lengua de signos espa??ola recoge las especificaciones: objetivos, contenidos, orientaciones metodol??gicas y procedimientos de evaluaci??n para el Nivel B1, que se corresponde con el hom??nimo de la escala del MCER. Con ella se describe, en l??nea de continuidad con la entrega anterior (Niveles A1 y A2), lo que supone que los alumnos alcancen un nuevo estadio en la estructura del curr??culo de la lengua de signos espa??ola.

Propuesta curricular de la lengua de signos espa??ola : nivel usuario independiente : B2

Esta publicaci??n de la serie de propuestas curriculares para la ense??anza y el aprendizaje de la lengua de signos espa??ola recoge las especificaciones (objetivos, contenidos y orientaciones metodol??gicas) para el Nivel B2, que se corresponde con el hom??nimo de la escala del MCER. Con ella se describe, en l??nea de continuidad con las entregas anteriores (Niveles A1 y A2; y Nivel B1), lo que supone que los alumnos alcancen un nuevo estadio en la estructura del curr??culo de la lengua de signos espa??ola.

Entorno de aprendizaje virtual adaptativo soportado por un modelo de usuario integral

El objetivo de esta tesis es mejorar la efectividad y eficiencia de los entornos de aprendizaje virtual. Para lograr este propósito se define un Modelo de Usuario que considera las características del usuario, el contexto y la Interacción. Estas tres dimensiones son integradas en un Modelo de Usuario Integral (MUI) para proveer adaptación de contenido, formato y actividades en entornos educativos con heterogeneidad de usuarios, tecnologías e interacciones. Esta heterogeneidad genera la entrega de contenidos, formatos y actividades inadecuadas para los estudiantes. La particularización del MUI en un entorno educativo es definida Modelo de Estudiante Integral (MEI). Las principales aportaciones de esta tesis son la definición y validación de un MUI, la utilización de un MEI abierto para propiciar la reflexión de los estudiantes sobre sus procesos de aprendizaje, la integración tecnológica con independencia de plataforma y la validación del MEI con estudiantes en escenarios reales.

A calibrated, non-invasive method for measuring the internal interface height field at high resolution in the rotating, two-layer annulus

We describe a remote sensing method for measuring the internal interface height field in a rotating, two-layer annulus laboratory experiment. The method is non-invasive, avoiding the possibility of an interaction between the flow and the measurement device. The height fields retrieved are accurate and highly resolved in both space and time. The technique is based on a flow visualization method developed by previous workers, and relies upon the optical rotation properties of the working liquids. The previous methods returned only qualitative interface maps, however. In the present study, a technique is developed for deriving quantitative maps by calibrating height against the colour fields registered by a camera which views the flow from above. We use a layer-wise torque balance analysis to determine the equilibrium interface height field analytically, in order to derive the calibration curves. With the current system, viewing an annulus of outer radius 125 mm and depth 250 mm from a distance of 2 m, the inferred height fields have horizontal, vertical and temporal resolutions of up to 0.2 mm, 1 mm and 0.04 s, respectively.

Effect of mycorrhizae and pH change at the root-soil interface on phosphorus uptake by Sorghum using a rhizocylinder technique

Sorghum (Sorghum bicolor) was grown for 40 days in. rhizocylinder (a growth container which permitted access to rh zosphere and nonrhizosphere soil), in two soils of low P status. Soils were fertilized with different rates of ammonium and nitrate and supplemented with 40 mg phosphorus (P) kg(-1) and inoculated with either Glomus mosseae (Nicol. and Gerd.) or nonmycorrhizal root inoculum.. N-serve (2 mg kg(-1)) was added to prevent nitrification. At harvest, soil from around the roots was collected at distances of 0-5, 5-10, and 10-20 mm from the root core which was 35 mm diameter. Sorghum plants, with and without mycorrhiza, grew larger with NH4+ than with NO3- application. After measuring soil pH, 4 3 suspensions of the same sample were titrated against 0.01 M HCl or 0.01 M NaOH until soil pH reached the nonplanted pH level. The acid or base requirement for each sample was calculated as mmol H+ or OFF kg(-1) soil. The magnitude of liberated acid or base depended on the form and rate of nitrogen and soil type. When the plant root was either uninfected or infected with mycorrhiza., soil pH changes extended up to 5 mm from the root core surface. In both soils, ammonium as an N source resulted in lower soil pH than nitrate. Mycorrhizal (VAM) inoculation did not enhance this difference. In mycorrhizal inoculated soil, P depletion extended tip to 20 mm from the root surface. In non-VAM inoculated soil P depletion extended up to 10 mm from the root surface and remained unchanged at greater distances. In the mycorrhizal inoculated soils, the contribution of the 0-5 mm soil zone to P uptake was greater than the core soil, which reflects the hyphal contribution to P supply. Nitrogen (N) applications that caused acidification increased P uptake because of increased demand; there is no direct evidence that the increased uptake was due to acidity increasing the solubility of P although this may have been a minor effect.

User interface standards for expert systems: are they appropriate?

In recent years there has been a growing debate over whether or not standards should be produced for user system interfaces. Those in favor of standardization argue that standards in this area will result in more usable systems, while those against argue that standardization is neither practical nor desirable. The present paper reviews both sides of this debate in relation to expert systems. It argues that in many areas guidelines are more appropriate than standards for user interface design.