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Uma das principais questões no desenvolvimento de infra-estruturas de ecrãs públicos interactivos está relacionada com o escalonamento da informação que deve ser apresentada. O escalonamento deve considerar, não apenas a informação, mas também os espectadores potenciais com o contexto do ambiente. A definição, representação e gestão do contexto assume um papel importante e tem influência no escalonamento. Neste artigo é observado o modelo de contexto baseado em ontologia que serve de base ao escalonamento da informação. O modelo proposto permite analisar e inferir em situações de contexto complexas, context reasoning e permite o tratamento de situações relacionadas com a indisponibilidade, ambiguidade e imprecisão da informação.
Nowadays web based applications represent an important role in business success, fast global advertisement of products, easy management and internal organization and fast information access are values that have shown decisive for a correct and supported organizations development. This essay describes a project work carried out in the academic environment, with open source tools, in order to develop a classified advertisement platform using web technologies, namely JSP, XML and JavaBeans. The application aims at supplying a set of functionalities related to students and products management, businesses management and the presentation of products between the students themselves. Thus this article presents the methodology followed since the modeling of the application process and the development of a data model that corresponds to the identified needs during the modeling phase of the processes, until the system implementation.
Dynamic sources, which make regularly updated data available for use by other applications, are increasingly a key enabling feature of the web. They are extensively used in all sorts of social media applications where they are re-combined in multiple ways to generate new aggregate services. Public situated displays are an emergent area where dynamic sources can also play a key role in providing situated and frequently updated content. However, the specificities of public displays raise the need for automated selection of the most relevant sources to present. This study addresses relevance from the perspective of timeliness. We propose a timeliness model that supports the most common types of dynamic source. To validate that model, we set an experiment with a public display exhibiting content from dynamic sources and receiving from users feedback on its timeliness. The results from this experiment suggest a reasonable match between our model and the users’ perspectives on timeliness. The results also show that the model is able to make comparative calculations of timeliness for different types of dynamic source. These results enable us to conclude that timeliness functions may help to significantly increase the relevance of content automatically selected from dynamic sources.
Public situated displays can represent an important mechanism to enhance users’ experiences and reflect the information and the interactions associated with their environment and the people on it. However, this type of embodiment requires the display system to be able to perform unassisted scheduling based on the current state of the environment in which it is integrated. In this paper, we explore this problem domain and the various ways in which it can be approached. This analysis is organised around three main parts of this problem: which dynamic information to consider, how to introduce domain knowledge for enabling rational choices and how to model the scheduling process itself. We also describe our own approach to these issues, a context-sensitive MAUT scheduler that selects the next item to be presented by determining the one with the highest utility considering the current context of the display.
This poster presents an information system that is being used in Escola Superior de Tecnologia de Castelo Branco to perform the pedagogical assessment of their teachers. The process, almost fully automated, begins by sending an access code by email to each student, which allows him to fill an Internet based questionnaire for each discipline he is registered. Each questionnaire data is then stored in a database for further automated analysis. The statistical results for each teacher, which are confidential, are automatically sent to him by email. Global results are both sent to responsible entities and published in the Intranet.
Traditionally, context-aware applications are developed using one of the following approaches: each application communicates directly with sources of context information; applications are developed with the aid of reusable libraries for processing context information or applications have their own context models. These approaches not only require effort on the part of those who develop them, but also create dependency between the developed context-aware applications and the systems developed for obtaining and providing the context information, thus hindering their reuse in other applications. In this paper we present a system that autonomously characterizes the physical, social and organizational context of a public space and delivers this information to context-aware applications. Experiments show that it provides relevant and useful context information that can be used by context-aware applications to improve their services.
A public display that is able to present the right information at the right time is a very compelling concept. However, realising or even approaching this ability to autonomously select appropriate content based on some interpretation of the surrounding social context represents a major challenge. This article provides an overview of the key challenges involved and an exploration of some of the main alternatives available. It also describes a novel place-based content adaptation system that autonomously selects from web sources the content deemed more relevant according to a dynamic place model. This model is based on a tag cloud that combines content suggestions expressed by multiple place visitors with those expressed by the place owner. Evaluation results have shown that a place tag cloud can provide a valuable approach to this issue and that people recognize and understand the sensitivity of the system to their demands.
Public displays are an increasingly ubiquitous element of our sociodigital landscape with a strong potential to become key building blocks for AmI. For that purpose, they should have the ability to dynamically and autonomously select content from web sources according to the relevance of their content to the continuous flow of social settings around the display. In this paper, we explore the creation of a public display system that evaluates the relevance of content from web sources and selects the most relevant content according to a dynamic tag cloud that incorporates static place definitions, but is also sensitive to the people around the display. We have developed and evaluate a dynamic content selection system based on those principles. The results show that place visitors recognize the sensitivity of the system to their demands and that a place tag cloud can provide an important element for the interpretation of place and for the combination of the interests expressed by the place owner and the multiple place visitors.
“Copyright © [2010] IEEE. Reprinted from 4th International Conference on Complex, Intelligent and Software Intensive Systems. ISBN:978-1-4244-5917-9. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from 5th International Conference on Signal-Image Technology & Internet-Based Systems. ISBN:978-1-4244-5740-3. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
Nowadays there are a vast number of devices and technologies available for the common citizen to improve their communication with others. This fosters the design and implementation of systems that explore the available features of these devices. This paper presents a system that allows to inform, on a personalized way, the actors of an education institution on a free way using popular communication standards. Features like the system’s architecture, prototype and system’s evaluation are explained in the paper. Results show that this system can be an important complement to other popular systems in education environments (e.g. e-mail, chats, Wikis, forums, e-learning platforms etc.).
This paper describes a web-based system which allows the user to manage and to do real time monitoring the access to the educational building spaces, using two data nets. The first one is based on the CAN bus for data acquisition and actuation tasks to which are connected control devices like, magnetic cards readers, door locks and sensors. The second one is an Internet/Intranet infrastructure and uses standard web technologies like PHP and Java to provide an effective control and real time monitoring. This system is implemented on the Linux operating system using the Apache HTTP server and make use of standard technologies in use on the Web, to make an effective campus-wide security system. To close the gap between these two nets we used a CAN/Intranet gateway. In this paper the system layout and its main components are described.
In recent years, there has been enormous research interest in natural resources monitoring. So, there is a need to develop easily accessible, cheap and reliable information systems for monitoring and early warning, which could be used in most natural resources. This paper presents an ongoing information system development that aims the monitoring and supervising of some parameters on water supply, such as quality and quantity. To implement our system we use several technologies in order to monitoring about 100 water tanks in an area of ±1000 Km2. In these technologies is included GSM communication, web infrastructure and sensing equipment that allows the access of information from any place of the world. In paper sections the main blocks of the system architecture are described in detail.
The dissemination of large displays and personal mobile computing devices has created new opportunities for the joint use of these devices. Together these devices can enrich public spaces, promoting new and more engagement interaction mechanisms, giving users relevant information and providing important resources that can promote conversations and group activities. In this paper we explore the joint use of public displays and personal mobile computing devices, as equipments for the dissemination of personalized information that is delivered to users according to their interests and expectations. Three main aspects characterize our proposal. First, it encloses in the same system two types of devices for delivering information: mobile devices and large public displays. Second, the user only receives information of his interest point of view and the information is delivered through the most proper device. Third, our proposal combines into the same system two different perspectives: informative, providing users with information about their subscriptions and socializing, i.e. presenting, in a public display, information about the place, about users’ interests and about interests of other people that visits the same place. We have developed and evaluate a partial prototype based on those principles. The results show that the system is easy-to-use, that it can support a wide range of activities and that the users recognize an added value of the system comparing to traditional approaches.
Tag clouds have become very popular as visual representations of the main topics in document sets or as navigation tools that can provide quick access to resources related with specific topics. However, their ability to represent the information environment associated with any meaningful reality in a way that is collectively visible, actionable and easily understood may also be very relevant, even when the reality being represented is no longer a set of documents or resources, but a stream of interactions occurring within a particular ubiquitous computing environment. In this paper, we explore the use of tag clouds within the context of situated displays and services. We hypothesise that such tag clouds may have a role as dynamic representations of place and also as interaction controls, supporting the same comprehension and navigation functions of classical tag clouds. We describe two case studies in which this concept of situated tag cloud has been experimented in real-world settings. The case studies demonstrate two different applications of the tag cloud concept as the basis for place description and situated interaction. The results obtained from the case studies suggest that situated tag clouds can indeed provide valuable representations of place and situations and can also support simple interaction models, allowing people to reason about the system behaviour and how it is being influenced by new interactions.
Nowadays there are a vast number of devices and technologies available for the common citizen to improve their communication with others. This fosters the design and implementation of systems that explore the available features of these devices. In this paper, we propose a Bluetooth-based interactive system for delivering personalized information in high education institutions. The system allows informing, on a personalized way, the actors of an education institution on a free way using popular communication standards. The scenario we promote in the paper is mainly focused on learning environments, however the framework is also applicable in other shared public and semi-public spaces such as offices, homes, companies and many others. One of the most important contributions of this work is to combine public displays and personal mobile devices for delivering personalized information according to the students’ location. A prototype has been built and discussed with demonstrative user scenarios. Early results show that teachers and students found some advantages in this system comparing to traditional approaches. This system can effectively support a wide range of activities for students. It provides to each student the possibility to have a personal interaction with the technology in an authentic and appropriate use context. Features like the system’s architecture, prototype and system’s evaluation are explained in the paper. Results show that this system can be an important complement to other popular systems in education environment (e.g. e-mail, chats, Wikis, forums, e-learning platforms etc.).
The development time in industrial informatics systems, within industry environments, is a very important issue for competitiveness. The usage of adequate targetspecific programming languages is very important because they can facilitate and improve developers’ productivity, allowing solutions to be expressed in the idiom and at the level of abstraction of the problem’s domain. In this paper we present a target-specific programming language, which was designed to improve the design cycle of code generation, for an industrial embedded system. The native assembly code, the new language structure and their constructs, are presented in the paper. The proposed targetspecific language is expressed using words and terms that are related to the target’s domain and consequently it is now easier to program, understand and to validate the desired code. It is also demonstrated the language efficiency by comparing some code described using the new language against the previous used code. The design cycle is improved with the usage of the target-specific language because both description and debug time are significantly reduced with this new software tool. This is also a case of university-industry partnership.
This paper presents a target-specific programming language (TSL) that was designed to improve the design cycle of code generation for an industrial embedded system. The native assembly code, the new language structure and their constructs, are presented in the paper. The proposed TSL is expressed using words and terms that are related to the target’s domain and consequently it is now easier to program, understand and to validate the desired code. It is also demonstrated the language efficiency by comparing some code described using the new language against the previous used code. The design cycle is improved with the usage of the TSL because description time and debug time are significantly reduced with this new software tool. This is also a case of university-industry partnership.
This article describes a web-based system to control and manage the access to the ESTCB, which it is under development as a student’s final project. Beyond an important pedagogical and technological value, we believe that this work is an important step towards offering strong and efficient security management for access control systems. We make use of standard technologies in use on the Web, to make an effective campus-wide security system. The system management and configuration, the consultation of access information for schedules, users, spaces, among others, will be carried out through the Internet. The proposed model is based on the use of two data nets: a CAN field bus to which are connected magnetic cards readers, door locks and sensors of each access place and the Ethernet that establishes connection between different CAN field bus and servers, which contain information about users and access rules.
No desenvolvimento de aplicações sensíveis ao contexto é importante que existam aplicações/plataformas que sejam responsáveis pela descoberta e processamento das informações do contexto e que disponibilizem essa informação para ser usada por essas aplicações. Neste trabalho é apresentado um sistema autónomo para caracterização do contexto de um local, com informação sobre a sua localização, sobre as condições ambientais e sobre a natureza da instituição onde se encontra esse espaço, e que permite disponibilizar essa informação para que possa ser facilmente usada por outras aplicações. As avaliações preliminares mostram que o sistema permite obter informações de contexto relevantes relacionadas com o local e com as características e natureza da instituição onde este se insere. Esta framework pode ser útil para facilitar a obtenção de informação de contexto em espaços públicos e na sua disponibilização para ser usada por aplicações sensíveis ao contexto.
The way patient information is presented has been proven to have an important impact on patient care. This paper presents a software component to be integrated in a virtual patient record used in a Portuguese hospital. This component supports genetic oncology consultations and aims to help the physician needs to visualize the patient's family tree in order to diagnose hereditary cancers in both patient and patient descendants. This system allows the physician to view relevant medical information of the elements of the family of a given patient, add new tests, as well as record new cancer situations that occur in any member of the patient’s family. Besides the graphical display of the patients’ family tree, the system also allows to differentiate between different groups of cancer by using symbols and colours, register new cancer occurrences within that family network, as well as information related to tests performed by them.