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Increasing reuse in learning objects authoring: a case study with the Cacuriá tool 在学习对象创作中增加重用:一个使用cacuri<e:1>工具的案例研究
Brazilian Symposium on Multimedia and the Web Pub Date : 2019-10-29 DOI: 10.1145/3323503.3349555
Thacyla de Sousa Lima, R. Azevedo, Carlos de Salles Soares Neto
{"title":"Increasing reuse in learning objects authoring: a case study with the Cacuriá tool","authors":"Thacyla de Sousa Lima, R. Azevedo, Carlos de Salles Soares Neto","doi":"10.1145/3323503.3349555","DOIUrl":"https://doi.org/10.1145/3323503.3349555","url":null,"abstract":"Artifacts and best practices reuse as a way of improving educational resources and easing and speeding up the authoring process have been an important theme since the earliest research efforts on Learning Objects (LOs). In such a context, authoring tools that allow teachers and tutors to create educational content without the need for advanced programming knowledge play an essential role. This paper presents the evolution of Cacuria ---an authoring tool that supports the creation of interactive multimedia educational content for the Web and digital TV--- towards improved support for LOs reuse and analyzes the impact of the proposals as perceived by the users of the tool. The proposed evolution is based on previous work on reuse requirements and best practices on authoring LOs, which resulted in the inclusion of three new features on the tool: Layouts, Widgets, and Application Templates. Through these new resources, authors can build LOs by reusing resources created by other authors and reuse good practices, e.g., through previously validated pedagogical practices. The added functionalities were evaluated in a qualitative study with 11 teachers/tutors. The results of the study indicate that the participants believe that the new functionalities improved the creation of reusable LOs both in the creative aspect and in the reduction of the total development time.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131536027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Social Flipped Classroom, an Innovative Strategy to Improve R&D on a Computer Technological Park 社会翻转课堂:提高计算机园区研发水平的创新策略
Brazilian Symposium on Multimedia and the Web Pub Date : 2017-10-17 DOI: 10.1145/3126858.3133315
Antônio Mauro Barbosa de Oliveira
{"title":"Social Flipped Classroom, an Innovative Strategy to Improve R&D on a Computer Technological Park","authors":"Antônio Mauro Barbosa de Oliveira","doi":"10.1145/3126858.3133315","DOIUrl":"https://doi.org/10.1145/3126858.3133315","url":null,"abstract":"\"Escola Pra Valer\", or Social Flipped Classroom, is an innovative teaching experience that focuses on the social view of the stu-dents and their protagonism in the classroom and in the labora-tory activities. This experience, put into practice at the Labora-tory of Computer Networks (LAR) at IFCE campus Aracati (Ce), uses philosophical assumptions from the book \"Escola Pra Valer\" suggesting to the teacher strategies that resemble the \"Flipped Classroom\" methodology. The work criticizes the delay in the delivering proper education to young people due to traditional methodologies. At the same time, it presents their philosophical presuppositions, justifies the efficiency of the \"Flipped Classro-om\" face the technological innovation and presents encouraging results of the \" Escola Pra Valer\" proposal for young people's life who work at the LAR, such as the creation of Aracati Digital, a R&D Pole in computer science.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114581716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Middleware for the Development of Distributed Collaborative Video Applications 分布式协作视频应用开发的中间件
Brazilian Symposium on Multimedia and the Web Pub Date : 2017-10-17 DOI: 10.1145/3126858.3126862
João Martins de Oliveira Neto, Lincoln David Nery e Silva
{"title":"A Middleware for the Development of Distributed Collaborative Video Applications","authors":"João Martins de Oliveira Neto, Lincoln David Nery e Silva","doi":"10.1145/3126858.3126862","DOIUrl":"https://doi.org/10.1145/3126858.3126862","url":null,"abstract":"Remote video applications over the internet have been a trend for the last few years. As they grew in popularity, several areas of knowledge have started to take advantage of their functionalities and the possibility to make collaborative environments using video arose. From videoconferences to educational telemedicine video streamings, these collaborative applications are usually hard and tedious to configure and deploy and usually limit the number of participants. This work proposes a scalable architecture for collaborative video applications that makes the development and deployment of collaborative video applications easier and supports a high number of users simultaneously producing and consuming video in these applications.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"6 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113937722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Video Streaming Over Publish/Subscribe 通过发布/订阅的视频流
Brazilian Symposium on Multimedia and the Web Pub Date : 2016-11-08 DOI: 10.1145/2976796.2976859
João Martins de Oliveira Neto, Lincoln David Nery e Silva
{"title":"Video Streaming Over Publish/Subscribe","authors":"João Martins de Oliveira Neto, Lincoln David Nery e Silva","doi":"10.1145/2976796.2976859","DOIUrl":"https://doi.org/10.1145/2976796.2976859","url":null,"abstract":"Mobile technologies have created a lot of challenges for distributed systems over the last decade. Intermitent connections and weak network signals can induce unnexpected behaviour in some applications. One kind of application that suffer from these difficulties is video streaming. This paper investigates the use of SDDL, a publish/subscribe middleware based on DDS, for live video streaming. Since SDDL is designed for scalable communications in a dynamic environment, we believe the proposed solution is fit for use in mobile networks.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121191987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Falibras Messenger: Solution to the Accessibility of the Deafs in Telegram Web with the Aid of Volunteer Computer Grid Falibras Messenger:在志愿计算机网格的帮助下解决电报网络中聋人的可访问性
Brazilian Symposium on Multimedia and the Web Pub Date : 2016-11-08 DOI: 10.1145/2976796.2988181
João Paulo Ferreira da Silva, Bruno Rafael Ferreira Souza Barbosa da Silva, P. Brito
{"title":"Falibras Messenger: Solution to the Accessibility of the Deafs in Telegram Web with the Aid of Volunteer Computer Grid","authors":"João Paulo Ferreira da Silva, Bruno Rafael Ferreira Souza Barbosa da Silva, P. Brito","doi":"10.1145/2976796.2988181","DOIUrl":"https://doi.org/10.1145/2976796.2988181","url":null,"abstract":"In Brazil there are about 9.6 million people who have some kind of hearing impairment. The Brazilian deaf own mother tongue the Brazilian Sign Language - Libras. Because it is a visual language, a deaf person has great difficulty in social interaction, particularly with hearing people. One way to work around this limitation is by supporting tools, such as Falibras Messenger, presented in this paper. It is an integrated Portuguese-Libras translator to Telegram Web application that aims to facilitate communication between deaf and hearing people. However, to enable the use of Falibras Messenger, it was necessary to refactor its architecture to adapt it to new scalability requirements, given the increasing demand of requests for instant messaging applications. In this work, the development of a new distributed translation architecture based on volunteer grid computing and a new tool for communication of deaf and hearing on the Web Telegram is addressed. The developed architecture was evaluated in a heterogeneous experimental environment presenting gains in scalability and increased performance of the median time translation.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129900186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Features of Second Screen Applications: A Systematic Review 第二屏幕应用程序的特点:系统回顾
Brazilian Symposium on Multimedia and the Web Pub Date : 2016-11-08 DOI: 10.1145/2976796.2988169
Francisca Joamila Brito do Nascimento, C. Souza
{"title":"Features of Second Screen Applications: A Systematic Review","authors":"Francisca Joamila Brito do Nascimento, C. Souza","doi":"10.1145/2976796.2988169","DOIUrl":"https://doi.org/10.1145/2976796.2988169","url":null,"abstract":"In this paper, we present a systematic literature review, whose object of study are the available features in second screen applications. The second screen is the ability to interact with the TV programming by using mobile devices. The research was conducted in order to find out what the most common features in second screen apps. The selected articles refer to 16 different features, which were grouped into 5 categories. Interactivity was the category with more features mentioned in the researched works. Therefore, we concluded the features that provide interactivity between users and TV programming are the most common on the second screen.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"102 4 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121942936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
An Architecture to Promote the Use of Mobile Devices on Interactions with Media Synthesized Remotely 一种促进移动设备与远程合成媒体交互使用的架构
Brazilian Symposium on Multimedia and the Web Pub Date : 2014-11-18 DOI: 10.1145/2664551.2664563
A. P. Godoy, C. Teixeira
{"title":"An Architecture to Promote the Use of Mobile Devices on Interactions with Media Synthesized Remotely","authors":"A. P. Godoy, C. Teixeira","doi":"10.1145/2664551.2664563","DOIUrl":"https://doi.org/10.1145/2664551.2664563","url":null,"abstract":"Computer graphics and virtual reality technologies allow audiovisual experiences with high level of realism, as the ones achieved in video games and movies. The synthetization of media with high degree of audiovisual realism demands specialized systems with high performance computing capacity. The profusion in the last decade of personal computing consumer electronics such as mobile and portable devices, encourages the interest in making possible, also in these devices, applications with high level of visual realism. However, due to the intrinsic limitations of the computing capability of mobile and portable devices, regarding to the physical characteristics of these devices, such as dimensions, electrical consume and heat dissipation, it's not possible directly process media with the same level of visual realism that is found in specialized systems. This research suggests the exploration of a traditional solution: the remote interaction with these applications. Challenges resulting from this approach are identified and studied. Solutions are proposed, analyzed and formalized in a architecture for reference. As a proof of concept the architecture is used in the development of applications on two scenarios: one in a local network with a media characterized by its low tolerance in delay of interaction response and another with a high tolerance media through the Internet. Also is showed the flexibility of the proposed architecture by integrating one of the applications developed with a multimedia context.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127100105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Contribution to the Sensor Network Management for Context Awareness in Ubicomp 对Ubicomp环境感知传感器网络管理的贡献
Brazilian Symposium on Multimedia and the Web Pub Date : 2014-11-18 DOI: 10.1145/2664551.2664564
R. Souza, J. Lopes, C. Geyer, A. Pernas, A. Yamin, G. I. Gadotti
{"title":"A Contribution to the Sensor Network Management for Context Awareness in Ubicomp","authors":"R. Souza, J. Lopes, C. Geyer, A. Pernas, A. Yamin, G. I. Gadotti","doi":"10.1145/2664551.2664564","DOIUrl":"https://doi.org/10.1145/2664551.2664564","url":null,"abstract":"One of the central aspects of Ubiquitous Computing (Ubicomp) is associated with tight integration between computer systems and the environment. In this sense, one of the main research challenges in the area is to provide mechanisms for context awareness that promote the development of applications that respond itself according to the dynamics of the physical environment of user's interest. This paper presents the EXEHDA-SN, a software architecture managed by rules that provides the interaction of UbiComp systems with the physical environment by sensors networks and actuators. This work is being developed as part of research efforts related to EXEHDA Middleware. To assess the functionality of the EXEHDA-SN, we present a case study in agricultural area, highlighting the prototypes and tests performed.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124753283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Generating Personalized Algorithms to Learn Bayesian Network Classifiers for Fraud Detection in Web Transactions 生成个性化算法学习贝叶斯网络分类器在网络交易中的欺诈检测
Brazilian Symposium on Multimedia and the Web Pub Date : 2014-11-18 DOI: 10.1145/2664551.2664568
A. G. C. D. Sá, G. Pappa, A. Pereira
{"title":"Generating Personalized Algorithms to Learn Bayesian Network Classifiers for Fraud Detection in Web Transactions","authors":"A. G. C. D. Sá, G. Pappa, A. Pereira","doi":"10.1145/2664551.2664568","DOIUrl":"https://doi.org/10.1145/2664551.2664568","url":null,"abstract":"The volume of electronic transactions has raised a lot in last years, mainly due to the popularization of e-commerce. We also observe a significant increase in the number of fraud cases, resulting in billions of dollars losses each year worldwide. Therefore, it is essential to develop and apply techniques that can assist in fraud detection. In this direction, we propose an evolutionary algorithm to automatically build Bayesian Network Classifiers (BNCs) tailored to solve the problem of detecting fraudulent transactions. BNCs are powerful classification models that can deal well with data features, missing data and uncertainty. In order to evaluate the techniques, we adopt an economic efficiency metric and apply them to our real dataset. Our results show good performance in fraud detection, presenting gains up to 17%, compared to the actual scenario of the company.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125671980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Unsupervised TV Scheduling Based on Collaborative Filtering 基于协同过滤的无监督电视调度
Brazilian Symposium on Multimedia and the Web Pub Date : 2014-11-18 DOI: 10.1145/2664551.2664585
L. F. Freitas, Heloisa Simon, A. V. Wangenheim
{"title":"Unsupervised TV Scheduling Based on Collaborative Filtering","authors":"L. F. Freitas, Heloisa Simon, A. V. Wangenheim","doi":"10.1145/2664551.2664585","DOIUrl":"https://doi.org/10.1145/2664551.2664585","url":null,"abstract":"The generation of a television program schedule is a daily challenge. Broadcasting companies need to broadcast the best content according to the audience's preference. This paper proposes a novel take on collaborative filtering techniques to automate the selection of content based on viewers' rating through an interactive digital TV application. In order to overcome the fact that a television channel can broadcast only one schedule at a time, we group all ratings on Time Intervals in order to generalize viewers' preference and present the most appropriate content using a collaborative filtering technique.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130176824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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