Search results for "hidden"
showing 10 items of 210 documents
Statistical analysis of life sequence data
2016
Complex dynamics, hidden attractors and continuous approximation of a fractional-order hyperchaotic PWC system
2018
In this paper, a continuous approximation to studying a class of PWC systems of fractionalorder is presented. Some known results of set-valued analysis and differential inclusions are utilized. The example of a hyperchaotic PWC system of fractional order is analyzed. It is found that without equilibria, the system has hidden attractors.
Combining Sequence Analysis and Hidden Markov Models in the Analysis of Complex Life Sequence Data
2018
Life course data often consists of multiple parallel sequences, one for each life domain of interest. Multichannel sequence analysis has been used for computing pairwise dissimilarities and finding clusters in this type of multichannel (or multidimensional) sequence data. Describing and visualizing such data is, however, often challenging. We propose an approach for compressing, interpreting, and visualizing the information within multichannel sequences by finding (1) groups of similar trajectories and (2) similar phases within trajectories belonging to the same group. For these tasks we combine multichannel sequence analysis and hidden Markov modelling. We illustrate this approach with an …
Localization and dimension estimation of attractors in the Glukhovsky-Dolzhansky system
2016
Lyapunov quantities and limit cycles in two-dimensional dynamical systems : analytical methods, symbolic computation and visualization
2011
EL MIEDO EN EDUCACIÓN FÍSICA: UNA HISTORIA RECONOCIBLE
2017
El miedo condiciona la manera de vivir, aprender y crecer en la escuela. Partiendo de datos etnográficos, este estudio explora la experiencia de miedo en Educación Física (EF) por medio de una perspectiva narrativa. Para analizar los datos y comunicar los resultados se utilizan prácticas analíticas creativas. El núcleo del artículo es una historia contada por Eva, una alumna que se enfrenta a un examen de EF. Su mirada evoca qué hace el miedo en diversos ambientes narrativos. La historia se presenta como un recurso para pensar con y sobre la experiencia del miedo en EF.
Model selection procedure for mixture hidden Markov models
2021
This paper proposes a model selection procedure to identify the number of clusters and hidden states in discrete Mixture Hidden Markov models (MHMMs). The model selection is based on a step-wise approach that uses, as score, information criteria and an entropy criterion. By means of a simulation study, we show that our procedure performs better than classical model selection methods in identifying the correct number of clusters and hidden states or an approximation of them
Clickstream Data Analysis: A Clustering Approach Based on Mixture Hidden Markov Models
2023
Nowadays, the availability of devices such as laptops and cell phones enables one to browse the web at any time and place. As a consequence, a company needs to have a website so as to maintain or increase customer loyalty and reach potential new customers. Besides, acting as a virtual point-of-sale, the company portal allows it to obtain insights on potential customers through clickstream data, web generated data that track users accesses and activities in websites. However, these data are not easy to handle as they are complex, unstructured and limited by lack of clear information about user intentions and goals. Clickstream data analysis is a suitable tool for managing the complexity of t…
Experimental on-demand recovery of entanglement by local operations within non-Markovian dynamics
2015
In many applications entanglement must be distributed through noisy communication channels that unavoidably degrade it. Entanglement cannot be generated by local operations and classical communication (LOCC), implying that once it has been distributed it is not possible to recreate it by LOCC. Recovery of entanglement by purely local control is however not forbidden in the presence of non-Markovian dynamics, and here we demonstrate in two all-optical experiments that such entanglement restoration can even be achieved on-demand. First, we implement an open-loop control scheme based on a purely local operation, without acquiring any information on the environment; then, we use a closed-loop s…
Kaiken keskellä : keskijohto strategisen muutoksen tekijänä ja kokijana
2018
This research focuses on the actions and perceptions of the middle managers during a strategic change. Over the years, strategic change and middle managers have been studied from various points of view. The importance of middle managers and their roles and actions have been argued both for and against. Most of the recent research emphasises the middle managers’ importance in strategic organizational change as mediators between the change initiators and the change recipients. However, there is less research on middle managers’ and subordinates’ sensemaking processes during a strategic organizational change, especially when identity, culture, artefacts, emotions and change resistance are cons…