Search results for "Base"
showing 10 items of 8362 documents
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…
Demo 85. Intuición, experimentación y modelización
2013
Objetivo: Reconocer los límites de la (mala) intuición, la utilidad de la experimentación y la necesidad del razonamiento analítico
Effets de la distance et dépendance d’échelles dans les modèles géographiques de villes et de territoires
2020
International audience
Simple Rules for Complex Near-Glass-Transition Phenomena in Medium-Sized Schiff Bases
2022
Glass-forming ability is one of the most desired properties of organic compounds dedicated to optoelectronic applications. Therefore, finding general structure–property relationships and other rules governing vitrification and related near-glass-transition phenomena is a burning issue for numerous compound families, such as Schiff bases. Hence, we employ differential scanning calorimetry, broadband dielectric spectroscopy, X-ray diffraction and quantum density functional theory calculations to investigate near-glass-transition phenomena, as well as ambient- and high-pressure molecular dynamics for two structurally related Schiff bases belonging to the family of glycine imino esters. Firstly…
Suitability of MMGBSA for the selection of correct ligand binding modes from docking results
2019
The estimation of the correct binding mode and affinity of a ligand into a target protein using computational methods is challenging. However, docking can introduce poses from which the correct binding mode could be identified using other methods. Here, we analyzed the reliability of binding energy estimation using the molecular mechanics‐generalized Born surface area (MMGBSA) method without and with energy minimization to identify the likely ligand binding modes within docking results. MMGBSA workflow (a) outperformed docking in recognizing the correct binding modes of androgen receptor ligands and (b) improved the correlation coefficient of computational and experimental results of rescor…
Modelling the dependence on medium and ionic strength of molybdate acidbase properties, and its interactions with phytate
2016
The importance of molybdenum from a biological, environmental and technological point of view is very well known since many decades [15]. In particular, it is mainly present in aqueous solutions as molybdate (MoO42), which is the biologically active form, entering in the cells by active transport systems. Though molybdate is the major species in neutral to basic pH conditions, at lower pH it undergoes protonation and, chiefly, polymerization, even at millimolar concentration levels [2]. Consequently, the modelling of its speciation and acidbase properties is not very simple, as demonstrated by the nonhomogeneity of available literature data. In this light, our group has started a systematic…
Counteracting counterfeiting? False money as a multidimensional justice issue in 16th and 17th century monetary analysis
2007
False money appeared as the general common issue in monetary debates that occured in European countries in the 16th and 17th centuries. It first refered to sovereignty, in a time of state-building, as well as to a serious economic problem. Beyond sovereignty and economy, justice and, then, the public faith, were endangered by those who devoted themselves to produce false coins. The thesis of this communication is that one cannot understand clearly the general topic of false money by reading texts of the time with today's general definition of false money. We propose, then, to identify the multiple dimensions of false money : counterfeiting (by individuals), degradations of coins (by individ…
A Pilot Study on Developing Newsgames in Collaboration between Journalism and Computer Science Students
2019
Abstract Producing digital and interactive journalistic products offers unique and important new learning opportunities for journalism education. This study analysed the experiences of two pilot courses on so-called ‘newsgames’ in a Finnish university in 2015 and 2017. The data consisted of the newsgames and other materials produced by the students, student feedback concerning the course and observations of teachers throughout the project. Our analysis demonstrates how producing newsgames in the context of higher education may foster project-based learning experiences, something that has been relatively rare in traditional journalism education. Collaboration with media companies also offere…
Conceptualizing the role of multidisciplinarity and student perceptions of university-industry collaboration in project-based learning
2017
Project-based learning has a long history, especially in the disciplines of computer science and engineering. This approach is used to offer students a realistic view of their discipline, and this experience can be enhanced with industrial involvement as companies bring their real world problems to projects. One recent trend in project-based learning is utilizing multidisciplinary teams, enabling students to contrast their skills and experience with students from other disciplines. This thesis focuses on a project course involving multidisciplinary teams and real customers that has been organized at the University of Jyväskylä since 2011 focused on developing students’ general working life …