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Inductive Model Generation for Text Classification Using a Bipartite Heterogeneous Network

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Journal of Computer Science & Technology 2014年第3期29卷 361-375页

作者： Rafael Geraldeli Rossi alneu de andrade lopes Thiago de Paulo Faleiros Solange Oliveira Rezende Institute of Mathematics and Computer Science University of So PauloSo CarlosBrasil

Algorithms for numeric data classification have been applied for text classification. Usually the vector space model is used to represent text collections. The characteristics of this representation such as sparsity and high dimensionality sometimes impair the quality of general-purpose classifiers. Networks can be used to represent text collections, avoiding the high sparsity and allowing to model relationships among different objects that compose a text collection. Such network- based representations can improve the quality of the classification results. One of the simplest ways to represent textual collections by a network is through a bipartite heterogeneous network, which is composed of objects that represent the documents connected to objects that represent the terms. Heterogeneous bipartite networks do not require computation of similarities or relations among the objects and can be used to model any type of text collection. Due to the advantages of representing text collections through bipartite heterogeneous networks, in this article we present a text classifier which builds a classification model using the structure of a bipartite heterogeneous network. Such an algorithm, referred to as IMBHN （Inductive Model Based on Bipartite Heterogeneous Network）, induces a classification model assigning weights to objects that represent the terms for each class of the text collection. An empirical evaluation using a large amount of text collections from different domains shows that the proposed IMBHN algorithm produces significantly better results than k-NN, C4.5, SVM, and Naive Bayes algorithms.

关键词： heterogeneous network text classification inductive model generation

Multidimensional Projections for Visual Analysis of Social Networks

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Journal of Computer Science & Technology 2012年第4期27卷 791-810页

作者： Rafael Messias Martins Gabriel Faria Andery Henry Heberle Fernando Vieira Paulovich alneu de andrade lopes Helio Pedrini Rosane Minghim Institute of Mathematics and Computer Science University of Sao PauloSao Carlos 13566-590Brazil CPM Braxis Capgemini Sao Paulo 04543-900Brazil Institute of Computing University of CampinasCampinas-SP 13083-852Brazil

Visual analysis of social networks is usually based on graph drawing algorithms and tools. However, social networks are a special kind of graph in the sense that interpretation of displayed relationships is heavily dependent on context. Context, in its turn, is given by attributes associated with graph elements, such as individual nodes, edges, and groups of edges, as well as by the nature of the connections between individuals. In most systems, attributes of individuals and communities are not taken into consideration during graph layout, except to derive weights for force-based placement strategies. This paper proposes a set of novel tools for displaying and exploring social networks based on attribute and connectivity mappings. These properties are employed to layout nodes on the plane via multidimensional projection techniques. For the attribute mapping, we show that node proximity in the layout corresponds to similarity in atgribute, leading to easiness in locating similar groups of nodes. The projection based on connectivity yields an initial placement that forgoes force-based or graph analysis algorithm, reaching a meaningful layout in one pass. When a force algorithm is then applied to this initial mapping, the final layout presents better properties than conventional force-based approaches. Numerical evaluations show a number of advantages of pre-mapping points via projections. User evaluation demonstrates that these tools promote ease of manipulation as well as fast identification of concepts and associations which cannot be easily expressed by conventional graph visualization alone. In order to allow better space usage for complex networks, a graph mapping on the surface of a sphere is also implemented.

关键词： social network visual exploration multidimensional visualization

The Increase in Domestic Violence during the Corona Virus Disease Lockdown(Covid-19)

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The Increase in Domestic Violence during the Corona Virus Di...

作者： Alisa Milan andrade lopes 西南大学

学位级别：硕士

In the past two years,domestic violence has been increased due to the lockdowns during the coronavirus（COVID-19）*** the global pandemic continues,countries,cities,and communities affected by the virus adopted the non-pharmaceutical interventions colloquially known as（encompassing,curfews,quarantines）measures to slow the spread of the *** such actions may reduce the transmission of the infectious disease,and for some people,this may be the best way to fight this virus,unfortunately not everyone found safety in the resulting *** domestic violence（DV）victims may currently be facing a “worst-case” scenario – finding themselves trapped in the home with a violent perpetrator,during a time of severely limited contact with the outside world（Campbell,L.M.,＆ Jones,S.J.2016）.Therefore,the lockdowns and the social and economic impacts have increased the exposure of people to abusive partners and known risk factors,while limiting their access to essential *** fact that people started to spend more time together,situations of humanitarian crises,and displacement may exacerbate existing violence,such as by intimate partners,as well as non-partners（sexual and domestic violence）,and may also lead to another form of violence such as psychological violence that includes acts such as intimidation,isolation from others,verbal aggression,threats,insults,control,humiliation and defamation,harassment or *** objective of this study first is to understand how the pandemic influenced and aggravated the situation of those suffering from DV before the pandemic,and its relationship with the new cases of DV that occurred for the first time during the pandemic from people that did not show violent behaviors before the pandemic,second to capture the burden of DV during the pandemic lookdowns,and how or if support and interventions were provided to the victims and last to analyze the consequences of DV on the victim’s mental health during the lockdowns of

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The Biophobia of Satan’s Bunny： The Influence of Horror Films in Contemporary Brazilian Literature

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Journal of Literature and Art Studies 2018年第9期8卷 1301-1312页

作者： Gabriela lopes Vasconcellos de andrade Universidade Federal da Bahia-Fulbright Salvador Brazil

In the course, FTV 201A： MEDIA INDUSTRIES and CULTURES of PRODUCTION： FOUNDATIONS, we discussed how to think the philosophy and thoughts that surround people who produce and work in the culture of production and media. That way, the purpose of this work is to think the use of post-horror label as a marketing strategy in the context of Brazilian contemporary literature and cinema. For that, I map the profile of three Brazilian writers： Santiago Nazarian, Antonio Xerxenesky, and Raphael Montes. They are published now by Companhia das Letras, the largest publisher in Brazil, which has an extensive work with the horror literature, having the exclusivity of Stephen King’s books. In addition, all three circulate differently in the media space, standing between an acceptance of academic criticism and the prestige of large-scale consumer audiences. I analyzed what are the writer strategies to construct their image and establish themselves in the literary market using the Post-horror label and its relation with the production company, RT Features, which is financing them. In the end, I did a critical analyzes of the post-horror label as a transmedia strategy to construct an author’s name.

关键词： post-horror RT features Brazilian literature

Fecal marker levels as predictors of need for endoscopic balloon dilation in Crohn's disease patients with anastomotic strictures

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World Journal of Gastroenterology 2017年第35期23卷 6482-6490页

作者： Susana lopes Patrícia andrade Eduardo Rodrigues-Pinto Joana Afonso Guilherme Macedo Fernando Magro Gastroenterology department Faculty of MedicineHospital de Sao Joao department of Pharmacology and Therapeutics University of Porto

AIM To evaluate the accuracy and best cut-off value of fecal calprotectin(FC) and fecal lactoferrin(FL) to predict disease recurrence in asymptomatic patients presenting with anastomotic strictures. METHODS This was a longitudinal single tertiary center study based on prospectively collected data(recorded in a clinical database created for this purpose) performed between March 2010 and November 2014. Crohn's disease(CD) patients with anastomotic stricture who submitted to postoperative endoscopic evaluation were included. Stools were collected on the day before bowel cleaning for FC and FL. Endoscopic balloon dilation(EBD) was performed if the patient presented an anastomotic stricture not traversed by the colonoscope, regardless of patients' symptoms. Successful dilation was defined as passage of the colonoscope through the dilated stricture into the neotermimal *** recurrence was defined as a modified Rutgeerts score of ≥ i2 b. RESULTS In a total of 178 patients who underwent colonoscopy, 58 presented an anastomotic stricture, 86% were asymptomatic, and 48(54% male; median age of 46.5 years) were successfully dilated. Immediate success rate was 92% and no complications were recorded. FC and FL levels correlated significantly with endoscopic recurrence(P de the need for EBD in this context.

关键词： Crohn's disease Anastomotic strictures Endoscopic balloon dilation Fecal markers Po stoperative recurrence

Endoscopic balloon dilation of crohn's disease stricturessafety,efficacy and clinical impact

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World Journal of Gastroenterology 2017年第41期23卷 7397-7406页

作者： Susana lopes Eduardo Rodrigues-Pinto Patrícia andrade Joana Afonso Todd H Baron Fernando Magro Guilherme Macedo Gastroenterology department Faculty of MedicineHospital de Sao Joao department of Pharmacology and Therapeutics University of Porto Division of Gastroenterology and Hepatology University of North Carolina

AIM To evaluate the incidence of anastomotic strictures after intestinal resection in Crohn's disease(CD), demonstrate long-term efficacy and safety of endoscopic balloon dilation(EBD) in CD strictures and its impact on the diagnosis of subclinical postoperative endoscopic recurrence. METHODS Retrospective single tertiary center study based on prospectively collected data between 2010 and 2015including anastomotic and non-anastomotic strictures. RESULTS29% of 162 CD patients included developed an anastomotic stricture. 43 patients with anastomotic strictures and 37 with non-anastomotic strictures underwent EBD; technical success was 97.7% and 100%, respectively, however, 63% and 41% needed repeat dilation during the 4.4-year follow-up. Longer periods between surgery and index colonoscopy and higher lactoferrin levels were associated with the presence of stricture after surgery. Calprotectin levels > 83.35 μg/g and current or past history of smoking were associated with a shorter time until need for dilation(HR = 3.877, 95%CI: 1.480-10.152 and HR = 3.041, 95%CI: 1.213-7.627). Anastomotic strictures had a greater need for repeat dilation(63% vs 41%, P = 0.047). No differences were found between asymptomatic and symptomatic cohorts. Disease recurrence diagnosis was only possible after EBD in a third of patients. CONCLUSION EBD is an effective and safe alternative to surgery, with a good short and long-term outcome, postponing or even avoiding further surgery. EBD may allow to diagnose disease recurrence in patients with no clinical signs/biomarkers of disease activity.

关键词： Crohn’s disease Endoscopic recurrence Anastomotic strictures Non-anastomotic strictures Endoscopic balloon dilation

delirium in hospitalized patients: Cohort observational in infirmary of medical clinic

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Open Journal of Preventive Medicine 2012年第2期2卷 190-195页

作者： Rilva lopes de Sousa-Munoz Leila Coutinho Taguchi Mara Rufino de andrade Katyara Mylena Silveira Ribeiro Lima Federal University of Paraiba(UFPB) Joao PessoaBrazil Lauro Wanderley University Hospital(LWUH) Joao PessoaBrazil

Objectives: To determine prevalence, incidence and risk factors of delirium in hospitalized patients in the infirmary of medical clinic of the Lauro Wanderley University Hospital. Method: An observational cohort study evaluating 140 patients over 18 years between admission and discharge. The survey instrument was the Confusion Assessment Method. Results: The prevalence of delirium was 5.7% (8/140) and the incidence, 2.1%. In patients with delirium were observed alteration of sleep-wake cycle (6/75%), altered level of consciousness (6/75%), disorganized thinking (5/62, 5%) and psychomotor retardation (5/62 5%). There was a significant association of delirium and age, mechanical restraint in bed, prior history of cognitive impairment, auditory and visual sensory deficit, psychiatric hospitalization, poor health status and mortality. Conclusions: The prevalence of delirium at admission was lower than that found in other studies, but it was a predictor factor of hospital mortality.

关键词： delirium Hospitalization Risk Factors Mortality

A Reliability-Based Strategy for the Analysis of Single Proton Exchange Membrane Fuel Cells

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Energy and Power Engineering 2019年第8期11卷 303-319页

作者： Patricia da Silva Pagetti de Oliveira Vinicius Andrea Elisabete Inacio Santiago Thiago lopes delvonei Alves de andrade Marcelo Linardi Nuclear and Energy Research Institute IPEN-CNEN/SP S&atilde o Paulo Brazil

The development of power conversion systems based on fuel cells has been demanding reliability studies since the requirements associated with cost and durability of these technological products have become fundamental to their acceptance by the energy market. The experimental part of the reliability study presented in this work consisted of performing life tests with single proton exchange membrane fuel cells (PEMFCs). The proposed reliability analysis methodology covered the application of qualitative and quantitative techniques. In the qualitative approach, a Failure Mode and Effect Analysis was developed in order to identify and evaluate all potential failures associated with the operation of fuel cells. In the quantitative approach, a statistical analysis was applied to the sample data generated in long-term steady-state tests of these devices. A two-parameter exponential distribution was fitted to data and the maximum likelihood estimate for the mean time to failure (MTTF) of the fuel cells was calculated. It is important to point out that the tests performed under the scope of this study were the first long-term experiments performed with the fuel cells produced in the laboratories of IPEN-CNEN/SP, Brazil. Although the results indicated that fuel cell performance and durability were still at a level below the targets normally established for similar commercial devices, the improvement of the main components of PEMFCs has been the objective of several projects developed at the institute. Thus, the main benefit brought by this study is the proposed methodology, which can be implemented as part of a reliability growth analysis of the fuel cells and can be integrated into the design process of these devices.

关键词： Fuel Cells Reliability Durability Performance Life Tests Lifetime Failure-Time

Physicochemical and Sensory Characterization of Banana and Aracá-Boi Jam

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Food and Nutrition Sciences 2014年第8期5卷 733-741页

作者： Eliseth de Souza Viana Jaciene lopes de Jesus Ronielli Cardoso Reis Marcos Vinícius Silva de andrade Celio Kersul do Sacramento Brazilian Agricultural Research Corporation EMBRAPANational Cassava&Fruits Research CenterCruz das AlmasBrazil Federal University of Reconcavo Baiano Cruz das AlmasBrazil State University of Santa Cruz IlhéusBrazil

This study evaluated the physicochemical and sensory properties of mixed jam elaborated with banana and ara?á-boi. Four banana extract (BE) and ara?á-boi (AB) jams were prepared using the following proportions: F1 (70% BE:30% AB), F2 (60% BE:40% AB), F3 (40% BE:60% AB) and F4 (30% BE:70% AB). The jams were analyzed for physicochemical and sensory properties. The sensory acceptance test was performed by 50 panelists who were asked to indicate how much they liked/ disliked the jams based on the following attributes: color, aroma, flavor and texture. The formulations that contained more BE (F1 and F2) showed a lower titratable acidity (TA), higher ratio (SS/TA) and higher total sugar. A global analysis of the internal preference mapping verified that formulations F1 and F2 were preferred for flavor and had good acceptance levels for the other evaluated attributes, which indicated that the consumers favored jams with lower concentrations of AB and higher concentrations of BE. The formulation F1 was considered the most accepted for all attributes evaluated and showed high purchase intent (68%), and was therefore appropriate for industrialization and consumption.

关键词： Musa spp. Eugenia stipitata Acceptance Preference Mapping Fruits Processing