1,721,032 research outputs found
Electrocardiogram application based on heart rate variability ontology and fuzzy markup language
No full textThe electrocardiogram (ECG) signal is adopted extensively as a low-cost diagnostic procedure to provide information concerning the healthy status of the heart. Heart rate variability (HRV) is a physiological phenomenon where the time interval between heart beats varies. It is measured by the variation in the beat-to-beat interval. Based on the HRV analysis, the medical experts can make a health assessment for our body, especially for the heart. This chapter presents a fuzzy markup language (FML)-based HRV ontology to apply to ECG domain knowledge. The ontology technologies are used to construct the personalized HRV ontology, and the FML is used to describe the knowledge base and rule base of the HRV. The ECG signals were collected from the involved students before they took exams and after they finished the exams. Based on the constructed FML-based HRV ontology, the variation in the nervous level between before exams and after exams could be inferred when implementing the proposed approach. An experimental platform has been constructed to test the performance of the ontology. The results indicate that the proposed method can work feasibly
Diet assessment based on type-2 fuzzy ontology and fuzzy markupl language
No full textNowadays most people can get enough energy to maintain one-day activity, while few people know whether they eat healthily or not. It is quite important to analyze nutritional facts for foods eaten for those who are losing weight or suffering chronic diseases such as diabetes. This paper proposes a novel type-2 fuzzy ontology, including a type-2 fuzzy food ontology and a type-2 fuzzy markup language (FML)-based ontology, for diet assessment. In addition, we also present a type-2 FML (FML2) to describe the type-2 fuzzy ontology and the FML2-based diet assessment agent, including a type-2 knowledge engine, a type-2 fuzzy inference engine, a diet assessment engine, and a semantic analysis engine. In the proposed approach, first, the nutrition facts of various kinds of food are collected from the Internet and the convenience stores. Next, the domain experts construct the type-2 fuzzy ontology, and then the involved subjects are requested to input the different food eaten. Finally, the proposed FML2-based diet assessment agent displays the diet assessment of the food eaten based on the constructed type-2 fuzzy ontology. Using the generated semantic analysis, people can obtain health information about what they eat, which can lead to a healthy lifestyle and healthy diet. Experimental results show that the proposed approach works effectively where the proposed system can provide a diet health status, which can act as a reference to promote healthy living. © 2010 Wiley Periodicals, Inc
Analysis of two-dimensional consolidation behavior of soils under cyclic loading considering exacerbated tunnel leakage
No full textPost-construction surface settlement can be a significant proportion of the total one, ranging from 30% to 90%. This settlement does not only affect the safety of tunnels, but also causes damage to adjacent buildings and underground infrastructures, posing a number of environmental, geological and geotechnical challenges. This study delves into the consolidation behavior of a soft soil around a circular tunnel, subjected to cyclic loading at the ground level. The Boltzmann growth function is introduced to characterize the exacerbation phenomenon in the lining permeability, while the stress-strain characteristics of the soft soil are described by a generalized Kelvin model. The governing equations for the consolidation of the soft soil around the tunnel are obtained based on the Terzaghi-Rendulic theory, and the dissipation of the excess pore water pressure (EPWP) is investigated. The results indicate that higher load frequencies accelerate the disappearance of cyclic load-induced EPWP fluctuation but, overall, cyclic loading prolongs the consolidation process. The local permeability coefficient predominantly affects the EPWP dissipation in the later consolidation stages. The viscous properties of the soil lead to an incomplete dissipation, and a higher number of Kelvin bodies in the adopted rheological model is associated to a slowdown of the consolidation process. The distribution of the EPWP in the upper part of the tunnel vault is also shown to depend on the ratio between the initial permeability coefficients of the lining and of the soil
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
FML-based ontological agent for healthcare application with diabetes
No full textIt is well-known that classical ontologies are not sufficient to deal with imprecise and vague knowledge. On the other hand, fuzzy ontologies can effectively solve data and knowledge with uncertainty, most importantly, if they are integrated with innovative methods for developing agents' intelligence as the Fuzzy Markup Language (FML). In this paper, an FML-based ontology-based intelligent fuzzy agent and a semantic decision making mechanism are proposed to apply to the semantic decision making for diabetes domain. The FML-based definition is considered modeling the knowledge base and rule base of the fuzzy objects and inference operators. The experimental results show that the proposed method is feasible for diabetes semantic decision-making. © 2009 IEEE
Dynamical cognitive services for ambient intelligence environments
No full textAmbient Intelligence systems are more than a simple integration among computer technologies, indeed, their design can strongly depend upon psychology and social sciences aspects describing, analyzing and forecasting the human being status during the system's decision making. Consequently, if from a technological view an AmI system can be considered as a simple framework for distributing personalized services, from a computational point of view, an AmI system is a distributed cognitive framework composed by a collection of intelligent entities capable of modifying their behaviours by taking into account the user's cognitive status in a given time. This paper introduces a novel methodology of AmI systems' design that exploits a service-oriented paradigm and a novel extension of Fuzzy Cognitive Maps theory benefiting on the theory of Timed Automata in order to create a collection of dynamical intelligent agents that use cognitive computing to define advanced services able to maximize environmental parameters as, for instance, user's comfort or energy saving. As will be shown in experimental results, the proposed approach maximize the system's usability in terms of efficiency, accuracy, recall and emotional response. ©2009 IEEE
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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