Brazil

Online user reviews written in Portuguese language are widely used by native speakers from several countries for decision-making and a large amount user reviews are available on the Web. However, only few studies on Portuguese sentiment analysis are reported as there is a lack of resources including domain-specific sentiment lexical collections. In this paper, we present an effective method for building a set of lexicons in restaurant domain for Portuguese language. The experiments on a large data collection of user reviews illustrate that our method significantly outperforms several alternative previous approaches of building domain-specific sentiment lexicon.

WebMedia 2021

Building a Restaurant-Specific Sentiment Lexicon via Probability Theory

text mining

lexicon

sentiment analysis

Promoted by the Brazilian Computer Society (SBC), the Brazilian Symposium on Multimedia and Web (WebMedia) is the main event of the theme in Brazil and an excellent opportunity for scientific and technical exchange among students, researchers and professionals in the areas of Multimedia, Hypermedia and Web. This year we will be celebrating to 26th edition of WebMedia, which will be held online from november 30th to December 4th .

Webmedia 2020’s programming includes:

– Technical sessions for the presentation of scientific papers
– National and international keynotes
– Panel with companies
– Workshops
– Short Courses
– Open community meetings

The topics of interest for submitting papers are:

– Web and Social Networks
– Multimedia
– Digital TV, Ubiquitous and Mobile Computing

Besides the main track, WebMedia 2020 will have in parallel the Tools and Applications Workshop, works Tools and Applications Workshop, the Workshop on Undergraduate Research Work and the Workshop The Future of Interactive.

The WebMedia 2020 organization is under the responsibility of the Programa de Pós-graduação Doutorado em Ciência da Computação – Associação UFMA/UFPI (DCCMAPI), do Programa de Pós-graduação em Ciência da Computação/ CCET (PPGCC), do Laboratory of Advanced Web Systems/UFMA (LAWS) e do Laboratório de Sistemas Multimídia/UFMA (TELEMÍDIA).).

#PartiuWebMedia2020 #WebMedia2020

WebMedia 2020

Promoted by the Brazilian Computer Society (SBC), the Brazilian Symposium on Multimedia and Web (WebMedia) is the main event of the theme in Brazil and an excellent opportunity for scientific and technical exchange among students, researchers and professionals in the areas of Multimedia, Hypermedia and Web.

technical paper

### Welcome to the Brazilian Symposium on Multimedia Systems and Web 
Promoted annually by the Brazilian Computer Society (SBC), the Brazilian Symposium on Multimedia Systems and Web (WebMedia) is the main event on the subject in Brazil and an excellent opportunity for scientific and technical exchanges between students, researchers and professionals in the areas of Multimedia, Hypermedia and Web. This year, we will be celebrating the 27th edition of WebMedia, to be held from **November 5th to 12th, 2021**, organized by the Federal University of Minas Gerais and Federal University of São João Del Rei. For the second time in its history, the event will be held online, with interaction between the participants being done through tools and web platforms.
 <iframe width="560" height="315" src="https://www.youtube.com/embed/2GvWKRUDtAY" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> 
The Webmedia 2021 schedule will feature:
 
* Technical sessions for the presentation of scientific articles.
* National and international lectures
* Panel with Companies
* Workshops
* Short courses
* Project meetings open to the community
 

The topics of interest for paper submission are:
 
* Web and Social Networks
* Multimedia
* Digital TV, Ubiquitous and Mobile Computing
 

In addition to the main track, WebMedia 2021 will feature the Tools and Applications Workshop, the Scientific Initiation Papers Contest, the Theses and Dissertations Contest, the RNP CT-Video Workshop.
 
The organization of WebMedia 2021 is under the responsibility of the [Department of Computer Science at UFMG (DCC/UFMG)](http://dcc.ufmg.br/) and [Department of Computer Science at UFSJ (DCOMP/UFSJ)](https://dcomp.ufsj.edu.br/)
 
**#PartiuWebMedia2021 #WebMedia2021**

The Brazilian Symposium on Multimedia Systems and Web (WebMedia) is the main event on the subject in Brazil and an excellent opportunity for scientific and technical exchanges between students, researchers and professionals in the areas of Multimedia, Hypermedia and Web.

Não acredite em tudo que você lê!" — Desinformação na Web: Desafios, Análises e Resultados

Como podemos moldar o futuro do Brasil por meio de design e tecnologia integrados à logística?

The power of graphs in immersive communications

In agribusiness, the treatment and sustainable management of waste in intensive production systems must consider productivity and economic gains in the short term and the sustainability of agricultural production. The acquisition of technical information, and the knowledge about the characteristics of the rural property, are
fundamental for stakeholders, especially considering the adequacy of sustainable environmental practices. It is necessary to provide a web-based system to support stakeholders in discovering and understanding their productive context. This paper proposes a solution to support stakeholders’ decision-making to improve sustainable
practices in agribusiness. The proposed solution is applied in the agricultural domain, focusing on sustainability, by implementing a web system supported by an ontology to organize and provide strategic information through a mobile app. Technical and regulatory environmental practices documents are recommended for a relevant context, considering a feasibility study with experts in the field. As a result, the approach provided decision-making support offering technical information efficiently and agile for stakeholders.

@grogest_Ambiental: A Web-based Decision Support System for agribusiness

Widgets are part of many web applications and implement distinct interaction mechanisms, in reusable user interface components.
However, implementing accessible widgets is a challenge, associated to different factors highlighted in the state-of-the-art, such as: lack of developers knowledge of accessibility guidelines, organization support and tools that support accessible development.
This paper reports an investigation on JavaScript source-code complexity impacts of implementing accessibility requirements in widgets.
We investigated Dialog, Drop-down menu and Tab widgets of 27 open-source JavaScript libraries.
The results showed that widget software artifacts reported an increased average of source-code complexity when implementing accessibility requirements.
Results also showed that using DOM-oriented JavaScript libraries (eg. jQuery) significantly increased source-code complexity of widgets.
Nevertheless, when using Declarative Component-based JavaScript libraries, no significant difference in source-code complexity was observed.
These results suggest that using Declarative Component-based widget libraries might reduce maintainability costs of JavaScript front-end projects.

Code Complexity Impact of Widgets Accessibility Implementation in JavaScript Open-Source Libraries

This work presents a systematic process for computing Bourdieusian Social Capital (BSC) within institutional Twitter profiles. Based
on the observation of sociability practices (social interactions) with
the support of Pierre Bourdieu’s Theory, we capture data related
to these practices, crystallized through performing actions such as
Tweet, Comment, Retweet and Like. Next, social interactions are
extracted from the captured data as sequences of actions and they
are used to compute the effective mobilization capacity of each
profile. Finally, the BSC volume is measured by using the effective
mobilization capacity, the number of social interactions and the
number of followers. The results obtained are aligned with the
Bourdieu theory and the systematic process allows to compute the
continuous sociability effort of each profile to maintain and expand
its BSC. Moreover, the results show that polarities positive and
neutral impacts in the composition of the BSC volume.

Link da apresentação: https://drive.google.com/file/d/1FMr2CgFZDrop4OQIB82qiBTChRpilOjr/view?usp=sharing

A Systematic Process for Computing Bourdieusian Social Capital within Institutional Profiles on Twitter.

This work presents a mobile tool for collecting and labeling data
about Twitter’s sociability practices. Such data are related to the
execution of functionalities such as Tweet, Comment, Retweet and
Like. During the capture, the data are labeled with a sequence of
actions, which is learned via the GSP algorithm, and the polarity of
sentiment contained in the tweet. At the end, the data are processed
to compute the volume of Bourdieusian Social Capital (BSC) of the
profile and are also available for the user of the tool to export
them. In addition, the composition of the BSC from the polarity of
sentiment is computed

Link da apresentação: https://drive.google.com/file/d/1FJGUsCSDlgMaDPOJrLhK1ER2-6Gen73B/view?usp=sharing

A Mobile Tool for Collecting and Labeling Data on Twitter's Network Sociability Practices

Using word embedding models for semantic search in the online employment marketplace

The Internet’s popularization has increased the amount of content produced and consumed on the Web. To take advantage of this new market, major content producers such as Netflix and Amazon Prime have emerged focusing on video streaming services. However, despite the large number and diversity of videos made available by these content providers, few of them attract most users’ attention.
For example, in the data explored in this paper, only 6% of the most popular videos are responsible for 85% of the total views. Finding out in advance which videos will be popular is not trivial, specially because of the large amount of influencing variables. Nevertheless, a tool with this ability would be of great value to help dimensioning network infrastructure and to properly recommend new content
to users. In this work, we propose two approaches to obtaining features to classify the popularity of a video before it is published. The first one builds upon predictive attributes defined by feature engineering. The second leverages word embeddings from the descriptions and titles of the videos. We experiment with the proposed
approaches on a set of videos from GloboPlay, the largest provider of video streaming services in Latin America. A combination of both engineered features and the embeddings using Random Forest machine learning algorithm reached the best result, with an accuracy of 87%.

Extracting Textual Features from Video Streaming Services Publications to Predict their Popularity

The massive use of online social media is a reality nowadays. Suchan increasing usage also raises growth in malicious activities in social media, one of which is the use of automated users (bots)that disseminate false information and can insert bias in analyses done on gathered social media data. Based on the concept of media literacy, this research presents a method to teach the human user to identify a pattern of a text produced by a bot, providing a tool(guide) to analyze social media text. Users who learned to identify a bot user with the guide had an average of 90% accuracy in the classification of new messages, against 57% of the participants who had no contact with the guide. The produced guide received a usefulness rating between 4 and 5 by the participants (scale from 1to 5, with 5 being the highest value).

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Não acredite em tudo que você lê!" — Desinformação na Web: Desafios, Análises e Resultados

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