1,722,649 research outputs found
Introduction to the Special Issue on Decision Analysis and Social Media
No full textPublished as:
Ali E. Abbas, Jay Simon, Chris Smith (2017) Introduction to the Special Issue on Decision Analysis and Social Media. Decision
Analysis 14(4):227-228. https://doi.org/10.1287/deca.2017.036
MORAN, Ali E. de
No full textCorrespondence between Mr. Ali E. de Morán and Gen. Alvaro Obregón, in which the former informs Gen. Obregón of having quit his job, warns against Japanese traders, and wishes him success in the elections. Response of acknowledgement. Mr. Ali E. de Morán requests Gen. Obregón for a job given his bad financial situation. Response regretting to be unable to help him. / Correspondencia entre el Sr. Ali E. de Morán y el Gral. Alvaro Obregón, en la que el primero comunica al Gral. Obregón haber dejado su trabajo, lo previene contra los comerciantes japoneses y le desea tenga éxito en las elecciones. Respuesta de enterado. El Sr. Ali E. de Morán solicita al Gral. Obregón un empleo dado su mal estado económico. Respuesta lamentando no poder ayudarlo
MORAN, Ali E. de
No full textCorrespondence between Mr. Ali E. de Morán and Gen. Alvaro Obregón, in which the former informs Gen. Obregón of having quit his job, warns against Japanese traders, and wishes him success in the elections. Response of acknowledgement. Mr. Ali E. de Morán requests Gen. Obregón for a job given his bad financial situation. Response regretting to be unable to help him. / Correspondencia entre el Sr. Ali E. de Morán y el Gral. Alvaro Obregón, en la que el primero comunica al Gral. Obregón haber dejado su trabajo, lo previene contra los comerciantes japoneses y le desea tenga éxito en las elecciones. Respuesta de enterado. El Sr. Ali E. de Morán solicita al Gral. Obregón un empleo dado su mal estado económico. Respuesta lamentando no poder ayudarlo
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
Online non-rigid motion and scene layer segmentation
No full textIn the past, different kinds of methods were devised to detect objects from videos. Based on the assumption of stationary camera, the now ubiquitous background subtraction learns the appearance of the background and then subtracts it to segment the scene. In practice such assumption is highly restrictive, and to handle moving cameras other methods were devised. For instance, motion segmentation targets the segmentation of different rigid motions in the video, while scene layer segmentation attempts to find a segmentation of the scene into layers that are consistent in space and time. Yet, such methods still suffers from other limitations such as the requirement of point trajectories to span the entire frame sequence. On a different aspect, recent years have witnessed a large increase in the proportion of videos coming from streaming sources such as TV Broadcast, Internet video streaming, and streaming from mobile devices. Unfortunately, most methods that process videos are mainly offline and with a high computational complexity. Thus rendering them ineffective for processing videos from streaming sources. This highlights the need for novel techniques that are online and efficient at the same time. In this dissertation, we first generalize motion segmentation by showing that under a general perspective camera trajectories belonging to one moving object form a low-dimensional manifold. Based on this, we devise two methods for online nonrigid motion segmentation. The first method tries to explicitly reconstruct the low-dimensional manifolds and then cluster them. The second method attempts to directly separate the manifolds. We then show how motion segmentation and scene layer segmentation can be combined in a single online framework that combines the strength of both approaches. Finally, we propose two methods that assign figure- ground labels to layers by combining several cues. Results show that our framework is effective in detecting moving objects from videos captured by a moving camera.Ph. D.Includes bibliographical referencesby Ali E. Elqurs
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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