Search results for " Classification"
showing 10 items of 1043 documents
Clubs de convergence et effets de débordements géographiques : une analyse spatiale sur données régionales européennes, 1980-1995
2007
Our article offers an econometric model of spatial interactions for the empirical analysis of growth in European regions over the period 1980-1995. The model detects spatial spillover effects and makes it possible to take account of the European economy’s strong polarization. More specifically, by factoring in both spatial autocorrelation and spatial heterogeneity, we characterize the economic polarization pattern in European regions, identify convergence clubs, and model them as spatial regimes. We estimate a two-regime model with spatially autocorrelated errors and show that the convergence process differs between the two regimes. We find a strongly significant spatial spillover effect : …
Critical limb ischaemia: definition and natural hystory
2004
The term critical limb ischemia refers to a condition characterized by chronic ischemic at-rest pain, ulcers, or gangrene in one or both legs attributable to objectively proven arterial occlusive disease. Critical limb ischemia implies chronicity and is to be distinguished from acute limb ischemia. Its incidence is approximately 500 to 1000 per million year, with the highest rates among older subjects, smokers and diabetics. The rate of primary amputation ranges from 10% to 40%, and was performed only when no graftable distal vessels were present, or in neurologically impaired or hopelessly nonambulatory patients. Contrarily, in some highly specialized and aggressive centres about 90% of pa…
DSM-5 ¿Qué modificaciones nos esperan?
2013
La Asociación Americana de Psiquiatría (APA), antes de la publicación definitiva del Manual DSM-5, abrió un periodo de participación donde investigadores, clínicos, pacientes y familias pudieron aportar comentarios sobre la futura clasificación. En este periodo se recibieron más de 15.000 comentarios que han sido tenidos en cuenta por los grupos de trabajo encargados de la elaboración del manual. En este artículo queremos exponer algunos de los cambios propuestos en la nueva versión del sistema de clasificación diagnóstico DSM-5 y que ciertamente van a afectar a nuestra práctica diaria. Nos centraremos principalmente en los trastornos que se inician en la infancia, los denominados trastorno…
Decentralized classification in societies of autonomous and heterogenous robots
2011
This paper addresses the classification problem for a set of autonomous robots that interact with each other. The objective is to classify agents that “behave” in “different way”, due to their own physical dynamics or to the interaction protocol they are obeying to, as belonging to different “species”. This paper describes a technique that allows a decentralized classification system to be built in a systematic way, once the hybrid models describing the behavior of the different species are given. This technique is based on a decentralized identification mechanism, by which every agent classifies its neighbors using only local information. By endowing every agent with such a local classifie…
Dog behaviour classification with movement sensors placed on the harness and the collar
2021
Dog owners’ understanding of the daily behaviour of their dogs may be enhanced by movement measurements that can detect repeatable dog behaviour, such as levels of daily activity and rest as well as their changes. The aim of this study was to evaluate the performance of supervised machine learning methods utilising accelerometer and gyroscope data provided by wearable movement sensors in classification of seven typical dog activities in a semi-controlled test situation. Forty-five middle to large sized dogs participated in the study. Two sensor devices were attached to each dog, one on the back of the dog in a harness and one on the neck collar. Altogether 54 features were extracted from th…
Nonlinear Time-Series Adaptation for Land Cover Classification
2017
Automatic land cover classification from satellite image time series is of paramount relevance to assess vegetation and crop status, with important implications in agriculture, biofuels, and food. However, due to the high cost and human resources needed to characterize and classify land cover through field campaigns, a recurrent limiting factor is the lack of available labeled data. On top of this, the biophysical–geophysical variables exhibit particular temporal structures that need to be exploited. Land cover classification based on image time series is very complex because of the data manifold distortions through time. We propose the use of the kernel manifold alignment (KEMA) method for…
Patient flows through Valhalla : A survival analysis in the context of short-term care institutions
2019
Master's thesis Business Administration BE501 - University of Agder 2019 Individuals experiencing functional decline may often require some form of assistance in order to reassume their activities of daily living. A common form of rehabilitation is a stay at a short-term institution, yet readmissions to such care facilities often occur. Home-based reablement has surfaced in Norway during the past ten years and aims to assist the user in reaching their own activity goals through a self-committed and intensive program, assisted by health care workers. The objective of this study isinquiring into the patient flows between home-nurse areas and short-term institutions in southern Norway over the…
Functional classifications in phytoplankton ecology: a comparative review of approaches and experiences
2013
Empirical models of phytoplankton groups and their recurrence in water bodies have traditionally made use of taxonomic classifications, implicitly or explicitly assuming that species classified together could share similar ecological properties. Nevertheless, the use of taxonomy in ecology has many drawbacks. From one side, many broader groups include species with very different ecological properties. From the other side, convergent evolution, the independent evolution of similar characters in different lineages, can explain why distantly phylogenetically related species can be linked together by close analogous ecological affinities. With the aim to obtain a better understanding of the fun…
Emotion recognition changes in a confinement situation due to COVID-19
2020
Abstract The confinement situation experienced as a result of COVID-19 will have consequences at a psychological level. These consequences can affect emotion recognition because, due to isolation, interactions and social contacts have been drastically reduced. The aim of this study was to find out if there were differences in facial emotion recognition in two groups of young adults, one confined during COVID-19 and the other unconfined. One hundred and sixty-four young adults were tested twice, the first time unconfined, to obtain the baseline, then the sample was divided into two subgroups so that 84 were evaluated in a confined situation and 80 in an unconfined situation. . Ekman 60 Faces…
Instrumental Odour Monitoring System Classification Performance Optimization by Analysis of Different Pattern-Recognition and Feature Extraction Tech…
2020
Instrumental odour monitoring systems (IOMS) are intelligent electronic sensing tools for which the primary application is the generation of odour metrics that are indicators of odour as perceived by human observers. The quality of the odour sensor signal, the mathematical treatment of the acquired data, and the validation of the correlation of the odour metric are key topics to control in order to ensure a robust and reliable measurement. The research presents and discusses the use of different pattern recognition and feature extraction techniques in the elaboration and effectiveness of the odour classification monitoring model (OCMM). The effect of the rise, intermediate, and peak period …