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Brazilian Symposium on Multimedia and the Web最新文献

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Adaptive layouts for authoring NCL programs 用于编写NCL程序的自适应布局
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526234
G. Amorim, J. Santos, D. Muchaluat-Saade
{"title":"Adaptive layouts for authoring NCL programs","authors":"G. Amorim, J. Santos, D. Muchaluat-Saade","doi":"10.1145/2526188.2526234","DOIUrl":"https://doi.org/10.1145/2526188.2526234","url":null,"abstract":"This paper presents a layout module that incorporates the facility of specifying adaptive spatial layouts, providing automatic creation of regions and descriptors for NCL documents. Two types of adaptive spatial layouts are provided: flowLayout and gridLayout. Adaptive layouts are very useful for defining generic templates for hypermedia documents, where the number of components will be specified by the final NCL application. Therefore this proposal facilitates the authoring of hypermedia documents used for interactive content creation in the Brazilian Digital TV System.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"57 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114117145","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: 4
A traffic shaping optimization methodology for web systems 一种网络系统流量整形优化方法
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526190
C. Mesquita, Ulisses Cavalca, A. Pereira, E. G. Carrano
{"title":"A traffic shaping optimization methodology for web systems","authors":"C. Mesquita, Ulisses Cavalca, A. Pereira, E. G. Carrano","doi":"10.1145/2526188.2526190","DOIUrl":"https://doi.org/10.1145/2526188.2526190","url":null,"abstract":"In recent years, computer networks have been characterized by heterogeneous traffic and dynamic management of different kinds of services. The web and network requirements have increased within time and, since bandwidth is limited, it becomes necessary to employ optimization procedures in order to make the network able to operate in its full capacity. Traffic shaping mechanisms implement Quality of Service (QoS) concepts to ensure acceptable service levels. This paper describes an approach for traffic shaping optimization. It is proposed a methodology based on throughput and packet loss optimization using genetic algorithms. This method was validated using actual data from a network infrastructure of a Public Educational Institution.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758707","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 heuristic evaluation of a mobile annotation tool 一个启发式评估的移动注释工具
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526232
B. C. Cunha, O. J. M. Neto, M. G. Pimentel
{"title":"A heuristic evaluation of a mobile annotation tool","authors":"B. C. Cunha, O. J. M. Neto, M. G. Pimentel","doi":"10.1145/2526188.2526232","DOIUrl":"https://doi.org/10.1145/2526188.2526232","url":null,"abstract":"Modern mobile devices are natural multimedia devices that enable one to access, manage and transmit multiple types of media such as video, photo, audio and maps. Video playing on these devices is becoming part of everyday life for many users. Aiming to enhance the video playback activity, we built a tool that allows temporal video annotation on mobile devices: text, audio and digital ink annotations can be added to the video using Android-based tablets and smartphones. Annotations can be passed along users through the sharing options available on the devices. We conducted a heuristic evaluation with ten experts and the results are discussed in this paper. Two different sets of heuristics were used to find a wider collection of issues. One of them is proposed by us and was developed especially for mobile devices. With this work, we expect to contribute with the theme of authoring on mobile devices in terms of user interface and evaluation.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132269607","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: 7
Interactive digital TV as revealed through words: focuses and research sources 互动数字电视的话语揭示:焦点和研究来源
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526213
S. Buchdid, M. Baranauskas
{"title":"Interactive digital TV as revealed through words: focuses and research sources","authors":"S. Buchdid, M. Baranauskas","doi":"10.1145/2526188.2526213","DOIUrl":"https://doi.org/10.1145/2526188.2526213","url":null,"abstract":"Interactive Digital TV (iDTV) exists within a digital ecosystem that interconnects a variety of media, viewers and electronic devices, and it reaches new proportions as computers and hyper-connectivity are being incorporated into objects and also into everyday environments, in both public and private spheres. Every emergent technology suffers from a lack of references, processes and artifacts for developers and as they assess and design new solutions. In light of this context, this study sought to map out the main research focuses that have been addressed in the iDTV field in recent years. Data was collected and an analysis was conducted on research sources based on the frequency of words from paper titles and their abstracts; results reveal individual characteristics of one of the most relevant conferences in the field (EuroITV) and other publications found in the ACM-DL. Similarities and differences on these vehicles, allow an overview of contributions and gaps in the field. Moreover, this study presents detailed information about conferences, journals, affiliations and countries where work in the field is registered.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123635944","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 investigation of the relationship between the amount of extra-textual data and the quality of Wikipedia articles 对维基百科文章质量与文本外数据量之间关系的调查
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526218
Marcelo Yuji Himoro, Raíza Hanada, Marco Cristo, M. G. Pimentel
{"title":"An investigation of the relationship between the amount of extra-textual data and the quality of Wikipedia articles","authors":"Marcelo Yuji Himoro, Raíza Hanada, Marco Cristo, M. G. Pimentel","doi":"10.1145/2526188.2526218","DOIUrl":"https://doi.org/10.1145/2526188.2526218","url":null,"abstract":"Wikipedia, a web-based collaboratively maintained free encyclopedia, is emerging as one of the most important websites on the internet. However, its openness raises many concerns about the quality of the articles and how to assess it automatically. In the Portuguese-speaking Wikipedia, articles can be rated by bots and by the community. In this paper, we investigate the correlation between these ratings and the count of media items (namely images and sounds) through a series of experiments. Our results show that article ratings and the count of media items are correlated.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128492878","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
ProcessSearch: a framework to search for business processes on the web ProcessSearch:一个在web上搜索业务流程的框架
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526223
Rodrigo Costa dos Santos, G. Xexéo, Fellipe Duarte, P. Nascimento, Rodrigo Aguas
{"title":"ProcessSearch: a framework to search for business processes on the web","authors":"Rodrigo Costa dos Santos, G. Xexéo, Fellipe Duarte, P. Nascimento, Rodrigo Aguas","doi":"10.1145/2526188.2526223","DOIUrl":"https://doi.org/10.1145/2526188.2526223","url":null,"abstract":"This paper presents a framework system, called ProcessSearch, which is used to search and identify business process descriptions stored on the web. Some metrics were proposed in order to identify the web documents describing a business process. Identifying descriptions of business processes is a difficult task because the web stores \"bag-of-words\" documents. Hence, the ProcessSearch framework has been constructed and implemented, using known technologies in information retrieval and computational linguistics. The result was a satisfactory list of web documents ranked (top-k) by relevance for some given keywords. For validation, a \"precision at k\" analysis was used to confirm the accuracy of the proposed metrics.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121784821","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
Delay-aware DWT-based image transmission in wireless visual sensor networks 基于延迟感知dwt的无线视觉传感器网络图像传输
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526200
D. G. Costa, L. A. Guedes, F. Vasques, P. Portugal
{"title":"Delay-aware DWT-based image transmission in wireless visual sensor networks","authors":"D. G. Costa, L. A. Guedes, F. Vasques, P. Portugal","doi":"10.1145/2526188.2526200","DOIUrl":"https://doi.org/10.1145/2526188.2526200","url":null,"abstract":"Wireless sensor networks have been employed as an effective tool for a large set of monitoring applications, directly supporting applications not addressed by conventional Internet-based technologies. Camera-enabled sensors enhance the applicability of those networks allowing innovative visual monitoring functions. Sometimes, source nodes will perform real-time monitoring of an area of interest, where visual data packets will need to be transmitted with minimum delay. However, energy depletion of the nodes that compose the transmission paths may hamper the network capability to deliver packets with time constraints. In such context, we propose a delay-aware image transmission mechanism where the relevancies of DWT subbands are considered when forwarding packets to the next hop toward the sink. In fact, parts of DWT-based encoded visual data may have different relevancies for the reconstruction of the original visual information and those relevancies may be exploited when forwarding packets. In the proposed approach, high-relevant packets are forwarded through paths with lower average end-to-end delay, while the remaining packets flow through paths high higher delay, allowing that low-quality versions of the transmitted images reach the sink as soon as possible. Moreover, the best paths will need to relay fewer packets, potentially reducing energy consumption and enlarging their lifetime. We present simulation results to attest the benefits of the proposed mechanism.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128042576","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
Heuristics for the assessment of interfaces of mobile devices 移动设备界面评估的启发式方法
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526237
O. J. M. Neto, M. G. Pimentel
{"title":"Heuristics for the assessment of interfaces of mobile devices","authors":"O. J. M. Neto, M. G. Pimentel","doi":"10.1145/2526188.2526237","DOIUrl":"https://doi.org/10.1145/2526188.2526237","url":null,"abstract":"Although usability heuristics are a useful tool for the evaluation of interactive user interfaces, the traditional Nielsen's heuristics were created without mobile computing in mind. Other heuristics proposed for mobile applications, usually derived solely from the traditional heuristics, consider aspects that are not directly related to the software's visualization layer to which user interfaces belong. In this study, we extended Nielsen's heuristics to derive other heuristics specifically for the usability evaluation of mobile user interfaces. Two separate sets of specialists evaluated an Android application using Nielsen's heuristics and the heuristics we derived: the latter allowed the identification of more usability problems.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130910791","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: 40
Using video embedded markings for supporting content sensitive interaction in multiple contexts 使用视频嵌入标记支持多种上下文中的内容敏感交互
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526210
Rostand E. O. Costa, T. Araújo, Gutenberg Pessoa Botelho Neto, D. A. N. S. Silva, R. Kulesza, Guido Lemos de Souza Filho
{"title":"Using video embedded markings for supporting content sensitive interaction in multiple contexts","authors":"Rostand E. O. Costa, T. Araújo, Gutenberg Pessoa Botelho Neto, D. A. N. S. Silva, R. Kulesza, Guido Lemos de Souza Filho","doi":"10.1145/2526188.2526210","DOIUrl":"https://doi.org/10.1145/2526188.2526210","url":null,"abstract":"Despite the numerous advances provided by Digital TV and Connected TV platforms, they have not provided significant gains to the television viewing experience. In the Connected TV platform, for instance, one relevant limitation is that the audiovisual content normally does not converse with the resources of these environments. In this work we propose a complementary approach to promote content-sensitive interactivity. This approach uses markup on video to promote content-sensitive interactivity based on self-contained hypermedia anchors. The anchors are self-contained metadata inserted synchronously with the narrative and contain necessary information to allow that a specific agent can lead the users to different contexts according to their interaction with the content. Our experiments show that is possible to create rich interactive narratives even with a limited set of anchor's classes, including support for pull, push and distributed modes.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130119461","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 formal approach for the specification of digital complex objects 数字复杂对象规范的形式化方法
Brazilian Symposium on Multimedia and the Web Pub Date : 2013-11-05 DOI: 10.1145/2526188.2526199
Ticiana Oniki Toffoli, N. P. Kozievitch, Marcos André Gonçalves, R. Torres
{"title":"A formal approach for the specification of digital complex objects","authors":"Ticiana Oniki Toffoli, N. P. Kozievitch, Marcos André Gonçalves, R. Torres","doi":"10.1145/2526188.2526199","DOIUrl":"https://doi.org/10.1145/2526188.2526199","url":null,"abstract":"Complex objects (COs) have surged as a way to integrate different digital resources under a same logical unit in order to facilitate aggregation and reuse. However, there is still a lack of consensus on precise theoretical foundations for COs, especially regarding design and specification, which compromise their utility and integration with existing software tools. Moreover, there has been little investigation on aspects related to the modeling of COs by the end user, much due to the lack of appropriate tools for this goal. In this work, we present a new Digital Library (DL) metamodel specially designed for the CO modeling which is grounded in formal theoretical specification for COs. More specifically, our goal is two-fold: (i) to indirectly validate our CO formalization by instantiating it within a DL modeling tool -- 5SGraph; and (ii) to investigate the difficulties of CO modeling and specification by real users using the specified metamodel. Experiments with real users indicate that the use of the metamodel and the graphical tool facilitates the understanding of the COs structure and the modeling process.","PeriodicalId":114454,"journal":{"name":"Brazilian Symposium on Multimedia and the Web","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134346188","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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