Search results for "Digital"

FPGA-based concurrent watchdog for real-time control systems

2003

A straightforward and efficient implementation of a custom concurrent watchdog processor for real-time control systems is presented. Emphasis is given to the techniques used for on-line checking the main processor activity without adding overhead, and to the advantages of a field programmable gate array implementation.

Granulometric moments and corneal endothelium status

2001

Abstract Specular microscopy is a common practice in Ophthalmology. The corneal endothelium status is usually evaluated by means of the density, the hexagonality, the mean, the standard deviation and the coefficient of variation of cell areas. We propose to replace the cell area moments by the corresponding moments of a different probability distribution, the granulometric size distribution associated to a disc. All cells touching the frame are ignored by the area moments but used by the granulometric moments. Twenty images have been analyzed. When the size of the focused region is reduced, the area moments show a greater variation than the corresponding granulometric moments.

Granulometric analysis of corneal endothelium specular images by using a germ–grain model

2007

Specular microscopy is widely used to study the human corneal endothelium status in vivo. In this paper, the corneal endothelium is represented as a binary image composed of the cell inscribed circles. The granulometric distribution function of the complement of this image is used as a functional descriptor, which provides information about the shape, size and spatial arrangement of cells. Experimental evaluation using bootstrap techniques shows its ability to discriminate between controls and pathological cases. It represents a reliable and graphical alternative to the classical indices (cell density, hexagonality and coefficient of variation of cell areas), which behave poorly when detect…

A granulometric analysis of specular microscopy images of human corneal endothelia

2005

The inner layer of the human cornea, called the corneal endothelium, plays an important role in the maintenance of corneal transparency. Specular microscopy is the most widely used technique to study the corneal endothelium in vivo. Improvements in technology have allowed us to obtain good quality specular images, but the detection and quantification of small size-shape cell changes is not obvious, specially when the physician wants to evaluate endothelial cell changes after some surgical procedures. This paper proposes a methodology to analyze specular microscopy images. Every corneal endothelium is described by means of different cumulative distribution functions or some moments (mean, st…

Classifying human endothelial cells based on individual granulometric size distributions

2002

Abstract This paper presents an application to a medical problem of methods of shape analysis based on mathematical morphology. The medical problem consists on the detection of abnormalities in the corneal endothelium, a tissue composed by quasi-planar cells of ideally regular hexagonal shape. Images of this tissue are taken by a specular microscope and used to evaluate the corneal endothelium status. Up to now, cell density, hexagonality and an analysis of cell areas are the usual descriptors of a corneal endothelium. These parameters are not sensitive enough to detect subtle lesions. What this paper proposes is an analysis based on granulometries, which are size-shape descriptors widely u…

Digital knowledge sharing and creative performance: Work from home during the COVID-19 pandemic

2021

Abstract The outbreak of the COVID-19 pandemic and the resulting social distancing requirements have led to major disruptions in the world of work. The outcomes of the enforced and large-scale work from home (WFH) practices are currently largely unexplored. This study aims to address this gap in the research by investigating the external and internal digital knowledge sharing (DKS) and creative performance (CP) of employees under these extraordinary circumstances. The social capital theory was utilized as the theoretical lens for examining the associations of DKS and CP with demographic, individual, and organizational factors. An online cross-sectional survey was carried out among knowledge…

Digital Labour, Pandemic COVID-19, and Emotions

2021

This chapter seeks to outline in a preliminary way the consequences of the pandemic in work in general and especially in digital work in its connection with emotions and the politics of sensibilities. Based on public and private reports and the opinion of experts, some traces are presented here that allow us to reconstruct some changes in the politics of sensibilities that have occurred due to the socio-labour pandemic impact. In this sense, the following argumentative strategy has been developed: 1) the theoretical perspective on the connection between digital and political work of sensibilities is outlined, 2) some of the main consequences of the pandemic at work are synthesized, and 3) b…

DIGITAL SKILLS AND COMPETENCES IN BUSINESS STUDENTS IN A COVID-19 LOCKDOWN SCENARIO

2021

La escuela o el vacío completo

2020

Este artículo utiliza una imagen pictórica en un doble sentido. En primer lugar, plantea el punto ciego de la preocupación por la brecha digital en el confinamiento por la COVID-19, a saber, la diferencia de rendimiento en la situación anterior correlacionada con la disposición de mercancías domésticas. En segundo lugar, utiliza la expresión de la pura no objetividad en relación a la posibilidad de extraer de Bourdieu y Passeron una teoría de la escuela como el medio cero o nulo, a la manera de Enzensberger.

Analysis of mobile applications aimed at early childhood: technical, pedagogical, design and content characteristics

2021

This article analyzes the technical, pedagogical, design and content characteristics of a sample of applications for children up to 5 years old, available on the Google Play platform. The study is part of an investigation titled: «Los materiales didácticos digitales en la Educación Infantil. Análisis y propuestas para su uso en la escuela y el hogar» (RTI2018-093397-B-I00) in which research teams belonging to three Autonomous Communities of the Spanish State (Islas Canarias, Galicia and Valencia) participate. The methodology used was based on content analysis. The 23 most popular apps on Google Play in June 2020 are analyzed. Three of them are the most downloaded in Spanish homes during the…