scholarly journals Inflated 3D ConvNet context analysis for violence detection

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
David Freire-Obregón ◽  
Paola Barra ◽  
Modesto Castrillón-Santana ◽  
Maria De Marsico

AbstractAccording to the Wall Street Journal, one billion surveillance cameras will be deployed around the world by 2021. This amount of information can be hardly managed by humans. Using a Inflated 3D ConvNet as backbone, this paper introduces a novel automatic violence detection approach that outperforms state-of-the-art existing proposals. Most of those proposals consider a pre-processing step to only focus on some regions of interest in the scene, i.e., those actually containing a human subject. In this regard, this paper also reports the results of an extensive analysis on whether and how the context can affect or not the adopted classifier performance. The experiments show that context-free footage yields substantial deterioration of the classifier performance (2% to 5%) on publicly available datasets. However, they also demonstrate that performance stabilizes in context-free settings, no matter the level of context restriction applied. Finally, a cross-dataset experiment investigates the generalizability of results obtained in a single-collection experiment (same dataset used for training and testing) to cross-collection settings (different datasets used for training and testing).

2019 ◽  
Vol 6 (02) ◽  
Author(s):  
Rony Mahendra ◽  
Erwin Dyah Astawinetu

The research objective is to establish an optimal portfolio and know the difference between risk and return stock index portfolio candidates and non-candidates. Method used in the preparation of this research portfolio is the single index model, while the samples of this study are active world stock indices version of The Wall Street Journal during the period August 2012 - August 2016 and The Global Dow is used as the benchmark stock index. In establishing the optimal portfolio is used two perspectives: the Rupiah perspective and the U.S. Dollar perspective. The results showed there were three stock indices from the perspective of Rupiah and 8 share index menurutperspektif U.S. Dollar that make up the optimal portfolio, with the cut-of-pointsebesar 0,01393menurut Rupiah perspective and the perspective of 0.0078 US Dollars Based on the perspective of return expectations Rupiah obtained by 0.0258 with a risk of 0.06512. Berdarkan perspective of US Dollars, obtained return expectations at 0.0154 with a risk of 0.0292. From the test results showed that the hypothesis, the return on both perspectives there are significant differences between the index of the candidate, with a non-candidate. Then the risk of stock index, among the candidates, with a non-candidate, the Rupiah perspective there is no difference, but in the perspective of US Dollars, there are significant differences.Keywords: Single Index Model, candidate portfolio, optimal portfolio, expected return, excess return to beta, cut-off-point


2013 ◽  
Vol 40 (2) ◽  
pp. 55-89 ◽  
Author(s):  
Joel E. Thompson

This study has a two-fold purpose. First, it seeks to determine the importance of financial accounting information to railroad investors (and speculators) in 1880s America. Second, a further goal is to ascertain what financial accounting information was readily available for use by these investors. Based on a comprehensive search of books of the era, the 1880s were a time of expanding advice for railroad securities holders that required the use of financial accounting information. Furthermore, new information sources arose to help service investors' needs. Statistics by Goodsell and The Wall Street Journal were two such sources. This article reviews these publications along with the ongoing Commercial and Financial Chronicle and Poor's Manual of the Railroads of the United States. Each of these sources helped railroad investors to follow contemporary advice of gathering financial accounting and other information when investing.


2013 ◽  
Vol 39 (1) ◽  
pp. 57-85 ◽  
Author(s):  
Alexander Fraser ◽  
Helmut Schmid ◽  
Richárd Farkas ◽  
Renjing Wang ◽  
Hinrich Schütze

We study constituent parsing of German, a morphologically rich and less-configurational language. We use a probabilistic context-free grammar treebank grammar that has been adapted to the morphologically rich properties of German by markovization and special features added to its productions. We evaluate the impact of adding lexical knowledge. Then we examine both monolingual and bilingual approaches to parse reranking. Our reranking parser is the new state of the art in constituency parsing of the TIGER Treebank. We perform an analysis, concluding with lessons learned, which apply to parsing other morphologically rich and less-configurational languages.


2021 ◽  
Vol 14 (11) ◽  
pp. 2445-2458
Author(s):  
Valerio Cetorelli ◽  
Paolo Atzeni ◽  
Valter Crescenzi ◽  
Franco Milicchio

We introduce landmark grammars , a new family of context-free grammars aimed at describing the HTML source code of pages published by large and templated websites and therefore at effectively tackling Web data extraction problems. Indeed, they address the inherent ambiguity of HTML, one of the main challenges of Web data extraction, which, despite over twenty years of research, has been largely neglected by the approaches presented in literature. We then formalize the Smallest Extraction Problem (SEP), an optimization problem for finding the grammar of a family that best describes a set of pages and contextually extract their data. Finally, we present an unsupervised learning algorithm to induce a landmark grammar from a set of pages sharing a common HTML template, and we present an automatic Web data extraction system. The experiments on consolidated benchmarks show that the approach can substantially contribute to improve the state-of-the-art.


2021 ◽  
Vol 6 (105) ◽  
pp. 78-86
Author(s):  
EKATERINA A. NIKONOVA

The article deals with the analysis of the balance of opinion in the newspaper, which is originally realized through editorial and op-ed genres. We analyzed 20 articles from “The Wall Street Journal” and “The New York Times” in the genres of editorial and op-ed about events in Afghanistan in August 2021, which were interpreted differently in mass media due to the role of the White House. The findings prove that in the context of new digital reality the op-ed has lost its original function of conveying alternative positions to the ones stated in the editorial; at the same time newspapers tend to advocate the positions shared by the political parties they have historically developed close relations with: “The Wall Street Journal” - with the Republican Party, “The New York Times” - the Democratic Party.


2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Wei Zhou ◽  
Chengdong Wu ◽  
Dali Chen ◽  
Zhenzhu Wang ◽  
Yugen Yi ◽  
...  

Recently, microaneurysm (MA) detection has attracted a lot of attention in the medical image processing community. Since MAs can be seen as the earliest lesions in diabetic retinopathy, their detection plays a critical role in diabetic retinopathy diagnosis. In this paper, we propose a novel MA detection approach named multifeature fusion dictionary learning (MFFDL). The proposed method consists of four steps: preprocessing, candidate extraction, multifeature dictionary learning, and classification. The novelty of our proposed approach lies in incorporating the semantic relationships among multifeatures and dictionary learning into a unified framework for automatic detection of MAs. We evaluate the proposed algorithm by comparing it with the state-of-the-art approaches and the experimental results validate the effectiveness of our algorithm.


Quipukamayoc ◽  
2014 ◽  
Vol 14 (27) ◽  
pp. 27
Author(s):  
Ernesto Augusto Polr Falcón

Se plantea cuatro objetivos, los dos primeros relacionados al análisis de la información periodística que ofrecen los artículos publicados en la página del "The Wall Street Journal Americas" del diario El Comercio de Lima, Perú y de dos artículos también publicados por el mismo diario, como única fuente disponible de investigación, ya que no se cuenta con bibliografía del tema, ni separatas que hayan comentado alguna parte del problema de irregularidades contables. Se fija el marco conceptual y el marco metodológico del estudio, que incluye el método histórico y el método hermenéutico, para conocer las acciones pasadas y buscar su explicación, respectivamente. En el análisis del problema, se presenta un esquema histórico específico: con fechas, títulos de los artículos publicados y un resumen de cada uno de ellos -La información obtenida es verdaderamente muy interesante y se van descubriendo una serie de situaciones de irregularidades contables, de posiciones empresariales diversas y de acciones frente a la justicia-. Con este análisis, se precisan las causas que originaron las irregularidades contables y se canalizan por áreas para una mejor toma de conciencia y aplicación de futuras acciones concretas de cambios en el ámbito contable americano. Estos canales agrupan las causas profesionales, económicas, sociales y éticas. Es importante también, mostrar la definición del marco conceptual como una aplicación de la Teoría General de la Contabilidad, para llegar al marco conceptual del IASB (lnternational Accounting Standards Board) y a su análisis secuencial, que precisa las diferentes etapas de objetivos, hipótesis, requisitos, conceptos y criterios que sustentan la estructura de los estados financieros y la razonabilidad en la información que se entrega a los usuarios. Se exponen alternativas para reforzar el mayor conocimiento de los principios de contabilidad y la necesidad de eliminar el nombre de contabilidad creativa y sustituirlo por el nombre de contabilidad engañosa, que fija con exactitud su espíritu de engaño, de defraudación, de hacer trampas, etc. Las conclusiones de este artículo, plantean la necesidad de mejorar la imagen del Contador Público con un nuevo enfoque, llevándolo a practicar el juramento profesional al inicio de sus actividades en la profesión, siguiendo el ejemplo del Juramento Hipocrático de los médicos. Se enfatiza el mayor estudio de los principios de contabilidad, el mejor conocimiento de la normatividad contable vigente; así como de los principios de ética profesional.


Economies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 198
Author(s):  
Andrzej Janowski

Over the years, the idea of corporate social responsibility has attracted the interest both of practitioners and researchers. While a discourse has occurred in the context of the meaning of Corporate Social Responsibility (CSR), there is no extensive analysis of the latest contributions. To address this gap, three objectives have been formulated for the purpose of this paper: to analyse development trends in CSR definitions, to assess the applicability of scientific efforts in the above-mentioned area and to demonstrate future research opportunities and threats based on the state-of-the-art in CSR. An organized literature review and bibliometric methods have been proposed based on 55 articles published in the “Corporate Social Responsibility and Environmental Management Journal”, the top ranked periodical with the highest Impact Factor, from its beginnings to January 2021. This research provides a clear overview of the recent CSR trends that are present in the literature, by pinpointing those works that refer to significant characteristics and indicate future trajectories of CSR in a managerial practical context, particularly important for the effectiveness of future CSR-oriented organizational activities. This paper summarises the existing CSR-related knowledge and constitutes the first attempt to investigate the process of the creation and development of the corporate social responsibility concept from its origins to its contemporary multidimensionality.


Temática ◽  
2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Bruno Washington Nichols ◽  
Pedro Chapaval Pimentel ◽  
Luiz Rogério Lopes Silva

Este artigo propõe uma análise da cobertura jornalística realizada na fanpage do The Wall Street Journal (WSJ) durante o período de prévias das eleições presidenciais estadunidenses. A pesquisa olha para a importância da mídia na construção da imagem pública dos principais pré-candidatos, Donald Trump (Partido Republicano) e Hillary Clinton (Partido Democrata), a fim de identificar a existência de viés favorável ou desfavorável. A metodologia utilizada consiste na análise quantitativa de conteúdo para avaliar as publicações realizadas entre os dias 01 de fevereiro a 14 de junho de 2016 que mencionaram nominalmente os dois pré-candidatos.  Sustenta-se a hipótese de que a confiabilidade conferida por todos os espectros ideológicos ao jornal não se apresenta com equidade no tratamento aos referidos candidatos. Os testes confirmam o favorecimento ao republicano. Palavras-chave: Comunicação Política. Crítica de Mídia. Imagem Pública. Eleições.


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