Ubiquitous Access to Web Databases

2003 ◽  
pp. 246-265
Author(s):  
Athman Bouguettaya ◽  
Brahim Medjahed ◽  
Mouorad Ouzzani ◽  
Yao Meng

With the emergence of the Web, there is a need to provide across-the-board transparency for accessing and manipulating data irrespective of platforms, locations, and systems. The challenge is to build an infrastructure to support flexible tools for information space organization, communication facilities, information discovery, content description, and assembly of data from heterogeneous sources. In this chapter, we describe the WebFINDIT system. WebFINDIT builds a scalable and uniform infrastructure for locating and accessing heterogeneous and autonomous databases in large and dynamic environments. One key feature of WebFINDIT is the clustering of Web databases into distributed ontologies. The main advantage of this ontological organization is filtering interactions and reducing the overhead of locating information. Another important feature is the large spectrum of heterogeneity being supported. Heterogeneity appears at different levels, including hardware (Sun and NT), operating system (UNIX and NT), database (Oracle, Informix, DB2, ObjectStore), and communication middleware (CORBA, DCOM, EJB, and RMI).

Author(s):  
Athman Bouguettaya

The emergence of Web databases has introduced new challenges related to their organization, access, integration, and interoperability. New approaches and techniques are needed to provide across-the-board transparency for accessing and manipulating Web databases irrespective of their data models, platforms, locations, or systems. In meeting these needs, it is necessary to build a middleware infrastructure to support flexible tools for information space organization, communication facilities, information discovery, content description, and assembly of data from heterogeneous sources. In this paper, we describe a scalable middleware for efficient data and application access that we have built using the available technologies. The resulting system is called WebFINDIT. It is a scalable and uniform infrastructure for locating and accessing heterogeneous and autonomous databases and applications.


2009 ◽  
pp. 903-930
Author(s):  
Athman Bouguettaya ◽  
Zaki Malik ◽  
Abdelmounaam Rezgui ◽  
Lori Korff

The emergence of Web databases has introduced new challenges related to their organization, access, integration, and interoperability. New approaches and techniques are needed to provide across-the-board transparency for accessing and manipulating Web databases irrespective of their data models, platforms, locations, or systems. In meeting these needs, it is necessary to build a middleware infrastructure to support flexible tools for information space organization, communication facilities, information discovery, content description, and assembly of data from heterogeneous sources. In this paper, we describe a scalable middleware for efficient data and application access that we have built using the available technologies. The resulting system is called WebFINDIT. It is a scalable and uniform infrastructure for locating and accessing heterogeneous and autonomous databases and applications.


Author(s):  
Alberto Andujar

This chapter analyzes the present situation of telecollaboration processes in synchronous online learning environments. The Web RTC protocol is presented as a new tool for online videoconferencing and telecollaboration that may potentially change the already in use applications for such purposes. In this vein, its characteristics such as P2P connectivity, open source protocol, no plugins installation, scalability, and accessibility guarantee that this technological development will help enhance the learning process at different levels. Higher institutions and practitioners will particularly benefit from the use of this technology as its use will increase cross-cultural knowledge as well as expand students' opportunities for out-of-class tuition.


Author(s):  
John Garofalakis ◽  
Theodoula Giannakoudi ◽  
Yannis Panagis ◽  
Evangelos Sakkopoulos ◽  
Athanasios Tsakalidis

In this chapter, an information acquisition system is proposed which aims to provide log analysis, dealing with ubiquitous access media, by use of semantic knowledge. The lately emerging figure of the semantic Web, the ontologies, may be used to exalt the Web trails to a semantic level so as to reveal their deeper usage information. The proposed architecture, which is presented in detail, intends to overcome mobile devices’ trail duplicates problems and detect semantic operations similarity of server Web services, which are often composed to provide a function. The references that supplement the chapter provide publications that discuss mainly log file mining and analysis and semantic similarity. Useful technology-used URL resources are also provided.


2019 ◽  
Vol 16 (3) ◽  
pp. 388-399
Author(s):  
Laís Alpi Landim ◽  
Maria José Vicentini Jorente

O objetivo deste trabalho é investigar aspectos cognitivos de Design da Informação que devem ser considerados no projeto e concepção de ambientes digitais e-Saúde, levando em consideração os graus de literacia em saúde das comunidades a quem se destinam. Assim, as características da e-Saúde, as relações entre saúde e tecnologia e os estudos em Design da Informação voltados à temática são relacionados, em convergência com a Ciência da Informação. O fornecimento de informação em saúde, tanto em meios analógicos quanto digitais, não significa necessariamente uma mudança nos hábitos de autocuidado e prevenção, devido aos diferentes graus de literacia em saúde das pessoas que as acessam. Há aspectos e características específicas na disponibilização de informações em saúde na Web que devem ser levados em consideração no Design de ambientes e-Saúde. Esse tipo de informação deve ser apresentado e representado de acordo com critérios e diretrizes especificamente voltados a esses ambientes, que são provenientes de estudos que consideram a carga cognitiva e o grau de literacia em saúde necessários para o processamento de determinados formatos de informação no processo comunicacional nesse contexto. Determinados fatores, como a ausência de jargões e formato do texto, emprego de recursos gráficos na apresentação e representação da informação e modalidades audiovisuais exigem menor esforço cognitivo no processamento da informação, sendo, assim, mais adequados a pessoas com diferentes níveis de literacia em saúde. Assim, apresenta-se como resultado um mapa conceitual com recomendações voltadas aos conteúdos textuais e gráficos para o Design de Informação de ambientes e-Saúde.*****The purpose of this paper is to investigate cognitive aspects of Information Design that should be considered in the design of eHealth environments, taking into account the degrees of health literacy of the communities to which they are intended. The characteristics of eHealth, the relationships between health and technology and the studies in Information Design related to the thematic area related, in convergence with Information Science. The provision of health information in both analogue and digital media does not necessarily mean a change in self-care and prevention habits due to the different degrees of health literacy of the people who access it. There are specific aspects in the provision of health information on the Web that should be taken into account in the Design of eHealth environments. This type of information must be presented and represented according to criteria and guidelines specifically geared to these environments, which are derived from studies that consider the cognitive load and degree of health literacy required for the processing of certain information formats in the communicational process in this context. Certain factors, such as the lack of jargon and the format of the text, the use of graphic resources in the presentation and representation of information and audio-visual modalities require less cognitive effort in information processing and are therefore more appropriate for people with different levels of health literacy. We present as a result of a conceptual map with recommendations focused on the textual and graphic contents for the Information Design of eHealth environments.


2021 ◽  
Vol 12 (2) ◽  
pp. 25-34
Author(s):  
Renato Stella

The pervasiveness of new media has raised some questions as to what would happen if we were to deprive ourselves of different media forms for a shorter or longer time. The debate on this issue has become intense in recent years, especially in relation to the hypothesis that the relationship with the web and internet can configure a greater and more insidious dependence on media. To verify how, and if, this happens, I asked 121 university students to refrain from the consumption of media on smartphones, tablets, radios and televisions for a period ranging from three days to a week. The results, collected in diaries compiled during the test, testified to different levels of attachment to media, the interruption of which produced notable consequences in the daily organisation of time and social relations.


2018 ◽  
Author(s):  
Asieh Daneshi ◽  
Hamed Azarnoush ◽  
Farzad Towhidkhah ◽  
Delphine Tranvouez-Bernardin ◽  
Jocelyn Faubert

The ability to estimate precisely the time to contact (TTC) of the objects is necessary for planning actions in dynamic environments. TTC estimation is involved in many everyday activities with different levels of difficulty. Although tracking a ball that moves at a constant speed and estimating the time it reaches a non-moving target can be fairly simple, tracking a fast moving car with inconsistent speeds and estimating the time it reaches another car is rather difficult. In this study, we asked participants to estimate TTC of an object in transversal and head-on motions. The object became invisible shortly after movement initiation. The results demonstrated that TTC estimation for transversal motion is more accurate than for head-on motion. We present a mathematical model to explain why humans are better in estimating TTC for transversal motion than for head-on motion.


2014 ◽  
Vol 16 (2) ◽  
pp. 68-70
Author(s):  
Miss.Priyanka P.Boraste ◽  

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