Search results for "DISTANCE"
showing 10 items of 1009 documents
Aprendizaje de similitudes entre pares de objetos mediante clasificación supervisada
2017
El uso de medidas de similitud, distancias o métricas se encuentra en la base del funcionamiento de numerosas técnicas estándar de clasificación, resultando además, una tarea fundamental e importante en las áreas de estudio del Aprendizaje Automático (Machine Learning) y el Reconocimiento de Patrones (Pattern Recognition). Dado que el cálculo de la similitud entre dos objetos puede ser muy diferente en función del contexto, la construcción inteligente de estas medidas a partir de los datos disponibles, puede ayudar en la obtención de clasificadores más robustos y mejorar los resultados en la tarea específica que se propone resolver. En los últimos años, el aprendizaje de métricas (Metric Le…
The Three Steps of Clustering in the Post-Genomic Era: A Synopsis
2011
Clustering is one of the most well known activities in scientific investigation and the object of research in many disciplines, ranging from Statistics to Computer Science. Following Handl et al., it can be summarized as a three step process: (a) choice of a distance function; (b) choice of a clustering algorithm; (c) choice of a validation method. Although such a purist approach to clustering is hardly seen in many areas of science, genomic data require that level of attention, if inferences made from cluster analysis have to be of some relevance to biomedical research. Unfortunately, the high dimensionality of the data and their noisy nature makes cluster analysis of genomic data particul…
WebTribe: Implicit Community Clustering by Semantic Analysis
2010
International audience; Since the advent of Web 2.0, any user becomes a content provider through personal websites, posts on wikis and forums, recommendations, annotations, etc. In this paper, we propose a method to analyze the interests of users based on their publishing activities, by positioning them into a semantic graph. We describe the WebTribe system that allows to extract topic information from collaborative websites and to query the resulting clusters of users.
New comers, confidence and social fragmentation in communities with strong cultural differentiation in Sicily
2011
This article is a community study carried out in a microcosm of Sicily about strategies to defend collective identity and territory from the waves of new immigrants, about the changing of representations of immigrants, and the problems that multiculturalism poses with regard to issues of identity and confidence
Protective coloration of European vipers throughout the predation sequence
2020
Antipredator adaptations in the form of animal coloration are common and often multifunctional. European vipers (genus Vipera) have a characteristic dorsal zigzag pattern, which has been shown to serve as a warning signal to potential predators. At the same time, it has been suggested to decrease detection risk, and to cause a motion dazzle or flicker-fusion effect during movement. We tested these hypotheses by asking whether (1) the zigzag pattern decreases detection risk and (2) the detection is dependent on the base coloration (grey or brown) or the snake's posture (coiled, basking form or S-shaped, active form). Additionally, (3) we measured the fleeing speed of adders, Vipera berus, an…
Journey to the Centre of Europe
1998
De nombreuses institutions locales utilisent, dans de véritables opérations de marketing territorial, une analogie entre centre géographique et centre géométrique du cercle pour valoriser leur localisation. Il s'agit là d'une conception particulière et étroite d'une idée plus riche et plus insaisissable. Le concept de centre est une construction économique et sociale mais il repose sur certains principes consensuels : l'accessibilité, la concentration,l'inégalité, la relativité spatiale et temporelle et la subjectivité compte tenu de sa dimension symbolique. Définir un centre c'est d'abord borner un sous espace de référence. Représenter le centre économique par le centre d'un cercle nécessi…
Culture, Cultural Distance and Cultural Intelligence : A Multilevel Hierarchical Linear Model Analysis of Contextual Business Cultural Intelligence Q…
2019
Master's thesis Business Administration BE501 - University of Agder 2019 Purpose –The purpose of our master thesis is to investigate contextual antecedents to Cultural Intelligence development. Particularly, we assess the ability of cultural distance to predict Business Cultural Intelligence Quotient scores.Design / methodology / approach–Given our literature review, we hypothesize that cultural distance significantly affects BCIQ in a positive way. For this matter, we split our hypothesis into three sub-hypothesis and measured cultural distance in three ways: having at least one foreign parent, the Mahalanobis cultural distance, and the delta of each GLOBE’s practices dimensions expressed …
Distance Learning Improvement Possibilities in Sciences for 8th to 12th Grades
2021
COVID-19 pandēmijas ietekmē, cilvēku ikdiena vairs nav iedomājama bez attālinātā darba un attālinātajām mācībām. Svarīgi, lai attālinātās mācības neradītu negatīvu ietekmi uz izglītības kvalitāti, īpaši specifiskos mācību priekšmetos, kad to veiksmīgai apgūšanai ir nepieciešami arī praktiskie darbi un laboratorijas darbi. Līdz ar to bija svarīgi izpētīt attālināto mācību specifiku un pilnveidošanas iespējas dabaszinību mācību priekšmetos, lai varētu izstrādāt rekomendācijas dažādām sociālajām grupām – pedagogiem, skolniekiem un viņu vecākiem, lai nodrošinātu pilnvērtīgu dabaszinātņu mācību priekšmetu apguvi. Autore pētījumā izmantoja gadījuma pētījuma dizainu, kurā atklāja, ka Latvijā šobrī…
Corporate board and default risk of financial firms
2022
This paper analyses the impact of corporate board structure on default risk of European banking firms. We focus on four core aspects of boards that have been addressed in Directive 2013/36/ EU to strengthen the corporate governance of banks: the size of boards, their independence, the participation of female directors and CEO duality. We employ panel data analysis to study the 109 European listed banks between 2002 and 2019. Default risk is estimated by Merton’s (1974) distance to default. We take into account the presence of unobservable heterogeneity, simultaneity and dynamic endogeneity and estimate the model using the dynamic difference and dynamic system GMM methodologies. The results …
Aesthetic Appeal and Visual Usability in Four Icon Design Eras
2016
Technological artefacts express time periods in their visual design. Due time, visual culture changes and thus affects the design of pictorial representations in technological products, such as icons in user interfaces. Previous research of temporal aspects in human-computer interaction has been focusing on particular interaction situations, but not on the effects of design eras on user experience. The influence of icon design styles of different eras on aesthetic and usability experiences was studied with the method of primed product comparisons. Affective preferences and their processing times were analysed in order to examine visual usability in terms of semantic distance and aesthetic a…