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Topic models have been shown to be a useful way of representing the content of large document collections, for example via visualisation interfaces (topic browsers). These systems enable users to explore collections by way of latent topics. A standard way to represent a topic is using a set of keywords, i.e. the top-n words with highest marginal probability within the topic. However, alternative topic...
The advent of the mobile Internet era makes people's lives more and more dependent on the network, and users of the App requirements are increasing, not only functional requirements, focusing on ease of use, aesthetic needs, etc., which are each App developers and designers need to consider.
The SICH Project specific objective is to develop new strategic tools and assessment techniques, based on semantic analysis on texts, to support the dynamic mapping and the automatic identification of illegal content over the Net. Xenophobia/Racism, illegal online Gambling and Novel Psychoactive Substances (NPS) are the main areas of reference. In this paper the authors present a systems based on...
In an office or laboratory, the informal communication that suddenly occurs in a face-to-face meeting sometimes takes the form of a heated discussion or important information sharing. Visual information, such as pictures and graphs, facilitates the fast and accurate communication of an intention between people. Therefore, visual information should be shown quickly in this situation so that the conversation...
Wireless Mesh Networks (WMNs) consist of several Access Points (APs) of Wireless Local Area Networks (WLANs) interconnected through wireless link. It is necessary to monitor the networks in order to properly operate WMNs. However, it is very difficult to always monitor WMNs. Though several researches for visualization system of WMNs were done, there are some problems such as lack of dynamic information...
The use of recommender systems to support users' search and selection of items in an information overloaded environment is widespread. Usually, precision and recall are utilized for evaluating a recommender system. However, an alternative measure should be considered, because a user's satisfaction is the most important factor to be considered when constructing a recommender system. Briefly, there...
As the information explosion is becoming more and more seriously, effective and efficient multi-document summarization techniques are becoming more and more necessary. Previous document summarization approaches mainly focus on texts. The poor readability of summaries prevents these approaches from widely practical use. This paper proposes a novel multi-document summarization approach to summarizing...
Adult image detection plays an important role in Internet pornographic information detection and filtering. By analyzing the shortcomings of existing pornographic image detection algorithms depending only on image content or keywords of text, a new adult image detection algorithm fusing image semantic features and image-correspondent text information is proposed. Based on Bag-of-Visual-Words model,...
Wikipedia articles see bursts of update activity whenever a topic is of more interest to the community or has somehow become controversial. Analyzing when and what changes are made can, thus, give us an idea of how the community feels about particular subjects. In this paper we present Pop Culture, a system that provides a visualization of Wikipedia's edits that allows us to reflect on how different...
The benefits of storytelling's are long-known and its potential to simplify concepts, create emotional connection, and capacity to help retain information has been explored in different areas, such as journalism, education, and others. The necessity to incorporate storytelling in visualizations arises from the need to share complex data in a way that is engaging. Advances in technology have enabled...
In this paper, we propose a cross-media regularization framework to enhance image understanding which can benefit image retrieval, classification and so on. The goal of cross-media regularization is to find regularization projections by exploiting the correlations between visual features and textual features. Thus, the original noisy distribution of visual features can be refined by leveraging the...
The evolution of technologies and tools generated by the technologies have always been present in education. Adapting these technologies and tools to use in the classroom has been, is and will be a constant concern of teachers. In this paper we present an overview of the evolution of technologies and tools and how they have been adapted for use in the classroom, likewise, we present an idea of what...
Cape Verde has been experiencing in the past few years, notorious progresses on the development of Information and Communication Technologies, especially in e-government and on the democratization of Internet access. In this context, usability is of paramount importance. This paper analyses the usability of the Cape Verdean government websites, by identifying the existing problems and by proposing...
This paper deals with obtaining the meteorological data (temperature, wind speed, wind direction, clouds coverage, sun rise, sun set) from the internet weather servers through free weather API functions in XML format. Together with stored operational data (traffic intensity, traffic speed, opacity, CO level…) from the existing tunnel are this data sent into the PLC based tunnel simulator through external...
The evolution of the several sensors embedded in mobile devices and the massive availability of information indexed on the Internet has provided a bright environment for the development of innovative applications of Augmented Reality (AR ) in areas such as geolocation and navigation. In this scenario with several sources of information, the obtaining of relevant and timely information has become primordial...
Online textual and visual data that are created and used by web users have been increasing dramatically and continually. This increase has caused the need for easy and fast access to online data and facilitated the development of alternative means of access to this data. Nowadays, web crawlers are the most efficient and popular tools used for accessing big volumes of data available on the web. In...
When image labeling (annotation) process for image retrieval is performed by fully automatic algorithms, labels have noise, errors and missing labels. Correcting labels gathered automatically from web (using information around an image such as text, user-tags, etc.) is done manually using human labor. Therefore, coordination of different indivuduals is necessary for a consistent annotation. In this...
Internet has formerly been used to link ideas, then people and now it is starting to connect things together. IoT constitutes a good paradigm to enable people to design and modify things, and then sharing their designs and modifications. Through the internet, things are nowadays able to exchange raw data and information thus enabling the development of a new class of interconnected smart objects....
The popularity of social media services has been innovating the way of information acquisition in modern society. Meanwhile, mass information is generated in every single day. To extract useful knowledge, much effort has been invested in analyzing social media contents, e.g., (emerging) topic discovery. With these findings, however, users may still find it hard to obtain knowledge of great interest...
Retrieving images for an arbitrary user query, provided in textual form, is a challenging problem. A recently proposed method addresses this by constructing a visual classifier with images returned by an internet image search engine, based on the user query, as positive images while using a fixed pool of negative images. However, in practice, not all the images obtained from internet image search...
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