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In this era of data explosion, big data research is gaining much importance. We have a collection of new technologies for data management in big data like NoSQL databases, (e.g. MongoDB, Cassandra), analytic tools (e.g. MapReduce, Hive) etc. These tools do not have a SQL query interface which users are very familiar with. So with Postgres 9.1 designers have been given an option of foreign data wrappers...
The traditional decision methods are always relying on priori knowledge and expert knowledge. Aiming at these shortcomings, we propose a novel decision-making method based on weighted formal context. Firstly, we use weight to evaluate object's importance level and attribute's frequency level. Secondly, we calculate the arithmetic mean value of the object's attribute weight to express corresponding...
Inspection methods and cheap self-reporting procedures have been significantly employed in the field of Human-Computer Interaction for assessing the usability of interfaces, systems and technologies. However, there is a tendency to overlook aspects related to the context and features of the users during the usability assessment process. This research introduces the concept of mental workload as an...
In this demo, we illustrate the formation, retrieval, and playback of autobiographical memory in an online personal memory album named MyLife. The memory in MyLife consists of pictorial snapshots of one's life together with the associated context, namely time, location, people, activity, imagery, and emotion. MyLife allows direct import of memories from other online personal photo repositories. For...
Game based learning is still not widely accepted for work based learning purposes. Though game based learning has been integrated into formal education in school and university, corporate human resource departments still rely on more traditional learning approaches, since computer games are often seen as more of an opposite to work processes.
How can we design intelligent play environments for open-ended play that support richness in play? Rich play can be described as ongoing play that changes over time in character, form and nature. This paper elaborates on our initial insights on how rules and goals develop from interaction opportunities of the system, based on two pilot studies with an interactive play environment for open-ended play...
Energy consumption is very important to cloud data centers, as it takes a large quotient of the operation cost much related to the environment. To decrease the energy consumption in cloud data center, one possible solution is processing different types of applications in clouds with different strategies. However, to reach this goal, the prime question to be solved is how to effectively classify the...
Pervasive computing, facilitates robustly and practically the access to any information wished, in an amount of time. Its ultimate goal is to integrate seamless technologies into our daily in order to make our life much easier, then we benefit all services anywhere, at any time. Learning has always been paramount, not limited to a certain age, in any form whatsoever (informal as well as the formal...
This article presents an exploratory study undertaken during the initial phase of the Adults Digital Literacy Project (LIDIA), aimed at identifying situations where adults are hindered from exercising their full citizenship, due to their lack of digital technologies knowledge. Within the framework of an action-research methodology, a questionnaire was applied to 106 adults, aged between 26 and 92...
Word Sense Disambiguation (WSD) is crucial and its significance is prominent in every application of computational linguistics. WSD is a challenging problem of Natural Language Processing (NLP). Though there are lots of algorithms for WSD available, still little work is carried out for choosing optimal algorithm for that. Three approaches are available for WSD, namely, Knowledge-based approach, Supervised...
One of the problems in the computer security system is port scanning attack. There are several detection systems have been developed to find out the occurrence of port scanning attack, one of them is anomaly detection method. A mechanism on how to implement the detection process in a more simple and effective way is a real serious challenge. In this paper, we design a simple implementation of anomaly...
In this paper, we investigate possible positive and negative consequences of the Internet of Things (IoT), characterized as the scenario in which computing-like technological devices and people can interact and exchange data without the need for deliberate human-to-human interaction, in social practices involving trust. Without denying the positive consequences of IoT, our interest is to discuss the...
The research that we conducted seeks to ascertain the contribution of the use of multimedia interactive whiteboard (MIW) in the introduction to reading and writing to students of the 1st grade of the 1st cycle of basic education. The sample was composed by all the students in a class of Basic School, located in Castelo Branco. The objectives that guided our study were to introduce the MIW in an educational...
We introduce the principles of symbolization and conceptualization of perceived reality. We show them as processes that are applicable inside of a computer mind. We derive those processes from principles of a human mind. We present process of higher order regular abstraction and state automata acceptance as possible machine reality realization mechanism. We present the algorithm for evolution of machine...
The KID (Knowledge-Information-Data) model is a unified structure which unifies data, information, and knowledge. It is also a data driven process in the data transformation process from data, to information, and then to knowledge. In this process, knowledge is enriched and enhanced with continuous perception of the external context and at the three stages of the data transformation. In other words,...
Social-affective aspects of interaction play a vital role in making human communication a rich and dynamic experience. Observation of complex emotional phenomena requires rich sets of labeled data of natural interaction. Although there has been an increase of interest in constructing corpora containing social interactions, there is still a lack of spontaneous and emotionally rich corpora. This paper...
A random sampling function Sample: U → {0, 1} for a key universe U is a distinguisher with probability. If for any given assignment of values v(x) to the keys x ε U, including at least one non-zero v(x) ≠ 0, the sampled sum ∑{v(x)|x ε U ^. Sample(x) = 1} is non-zero with probability at least Α...
In this paper, we present an innovative mixed pedagogical method to improve teaching and learning in undergraduate courses related to computer area. The method proposes learning multi-criteria assessments and pedagogical strategies, such as problem-based learning, that should be carried out during the activities. This research was performed in a three-year case study in courses undertaken at the Federal...
In e-marketplace, semantic document exchange is a methodology of providing exchangeable semantic documents, which ensures document writer, writer's computer, reader's computer and document reader to share a same understanding in meaning on any exchanged document, that is, a semantic document is exchangeable across any heterogeneous contexts. Existing methodologies for semantic document exchange, in...
Since 2010 the Universitat Politècnica de València offers the bachelor degrees called “Grados”. The “Grados” follows the guidelines of the European Higher Education Area. Among them are specially relevant those giving students more participation on the education process and incorporating continuous evaluation. Because of the frustrating results obtained by students of the “Physical Fundamentals of...
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