1,721,004 research outputs found
Computing and Visualizing Dynamic Time Warping Alignments in R: The dtw Package
Full text linkDynamic time warping is a popular technique for comparing time series, providing both a distance measure that is insensitive to local compression and stretches and the warping which optimally deforms one of the two input series onto the other. A variety of algorithms and constraints have been discussed in the literature. The dtw package provides an unification of them; it allows R users to compute time series alignments mixing freely a variety of continuity constraints, restriction windows, endpoints, local distance definitions, and so on. The package also provides functions for visualizing alignments and constraints using several classic diagram types.
Application of the ITC-irst spoken dialog system in a medical domain
No full textThe paper describes the ITC-irst approach for handling spoken dialog interactions over the telephone network. We will specifically describe the usage of the dialog system within a tele-medicine application scenario.
First, the system architecture will be summarized, then we will briefly describe our approach for evaluating confidence measures for each of the words in the "best path" provided by our recognizer.
Finally, an automatic service for home monitoring of patients affected by hypertension pathology will be described. Patients must periodically introduce data into a database containing their personal medical data. The collected data are managed, according to well
established medical guidelines, by an automatic system that can suggest therapies or alert doctor
An architecture for a multi-modal Web Browser
No full textIn this work we propose an architecture for handling multi-modal browsing through the synchronization of HTML and VoiceXML documents. A client uses a traditional Web brower to interpret HTML documents. The client should also be able to acquire and transmit the voice signal to the server (voice channel). The server slide hosts: a conventional Web server, which handles both HTML and VoiceXML requests, the Speech Server, which manages both ASR and TTS resources and the multi-modal brower process. The symchronization take place through a TCP/IP connection between the two browser (visual and multi-modal). The multi-modal brower consists of 3 components: a Voice Gate that manages the voice channel, a Visual Gate that manages a TCP/IP connection with the Web browser and an Interpreter Manage that corresponds to the VOiceXML Interpreter Context and integrates the VOiceXML Interprete
Home Monitoring of Hypertensive Patients Through Intelligent Dialog System
No full textRecent advances in automatic speech recognition and related technologies allow the computers to carry on conversations by telephone. We based on the knowledge represented in a widely accepted guideline for the care of hypertension to develop a system that allows physicians to manage a complete medical record for hypertensive patients. The care delivery professional can enter, manipulate and review the record through a conventional GUI. Patients are allowed to dial a toll-free number and enter a subset of the data by themselves. They interact with an automatic speech recognition and synthetisation engine whose behavior is determined by an intelligent agent based on their condition and treatments, which are stored in the database. The aim of the dialog is to allow patients to efficiently enter the data that need more frequent monitoring, such as blood pressure values and habits. The dialog system is flexible towards a user-friendly and adaptive interactio
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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