Search

The main objective of this work is the illustration of textual statistical analysis in confronting of the speeches of three great theorists of the world economy; it is aimed to review the emphasis from semantic segments that characterize the speech of each one. In this study, through a correspondence analysis, textual variables from the selected papers were identified, which are presented as characterizing the main concepts that establish patterns in each discourse. The results show the power of this methodology for applications in economics. [ABSTRACT FROM AUTHOR]

A structure of two degrees of freedom permits uniting the controller's design so much for disturbances in the load same as for changes in the reference. In the design of a proportional integral derivative controller of two degrees of freedom (PI-2DoF) it is necessary to introduce conditions of robustness. The present paper proposes a rule of tuning that permits getting the level of robustness in a continuous interval with a smaller error than "± 0.06" of the desired value, surpassing the difficulty of the discreet margins of robustness. The rules was obtained using an adjustment of curves of the controller's optimal parameters, obtained as from the application of the differential evolution optimization's algorithm on a set of representative test's plants of industrial processes. The tuning rules for PI-2DoF control are used to establish the comparison with the rules in literature. [ABSTRACT FROM AUTHOR]

The flexibility of spectrum usage required by emerging paradigms, radio spectrum demand driven by new wireless technologies, new applications and government policies oriented to massive use of Internet require spectrum management authorities to have smarter tools to do their work in an efficient way. This paper presents the design and implementation of a web application to support spectrum management activities using constraints programming. The design includes a mathematical model for allocation constraints, a mathematical model for interference constraints, a relational database of the National Allocation Table considering bands, channels and services associated with geopolitical division of Colombia, and an operator allocation database. These tools allow creating and to parameterize different levels of restrictions establishing different costs and weights. The interference analysis module takes into account the geographical location and technical characteristics of transmitting stations. The tool developed in this work can be used, among others, in allocation optimization studies, assessing policies of spectrum reallocation, allocation analysis to maximize specific criteria, reducing technology costs of implementing specific technologies and help identifying objective variables for spectrum price estimation. To facilitate the understanding and exploitation of the application several didactic examples are included. [ABSTRACT FROM AUTHOR]

What makes elegant, valid, useful and convincing evidence? Find the answer to this question has been the work field for decades by various researchers. In the literature there is a number of papers on Empirical Software Engineering and discussed in countless discussions, workshops, conferences and special issues of journals. This article presents a reflection on the evidence; is reviewed progress in Software Engineering and attempts to answer questions such as: What is the good that has been done so far? Where will the related research? The findings show that: 1) find about convincing evidence is harder than you may think, 2) Software Engineering researchers have to work together as a community and share their achievements, and 3) it must be acknowledged that convincing evidence is a specific component context, because that is convincing for someone may not be for others. Consequently, we must be prepared to reinterpret and rescan each time you disclose something about. [ABSTRACT FROM AUTHOR]

This paper takes as a basis the existence of an Informatics Technological Centre, implanted in a Research Complex, which is based on an architecture of agents and provides users with updated information, mechanisms of alerts and ease in finding information with a proactive behavior. Despite all these facilities provided, this Technological Observatory has lacks of functionalities for monitoring trends and indicators related to research topics. It is proposed to use Business Intelligence elements, such as dashboards, plus social modeling approach and i* to model the Observatory with new functionality to improve support decision making. As a result i* models are obtained where Technological Observatory requirements following a goal-oriented approach are captured. In these models the actors, goals, tasks and resources needed to incorporate elements of the dashboards in the Technology Centre are incorporated following an architecture of agents. [ABSTRACT FROM AUTHOR]

Scheduling problems in educational institutions have a computational complexity that makes it difficult to obtain optimal solutions using exact methods. Thus, heuristic techniques have been used to generate feasible solutions in acceptable computation times. In this paper, we solve the problem of assigning teaching and learning units in the least number of quarters using a population heuristic, Method of Musical Composition. The generated solutions satisfy the requirements and show higher quality than manual-built schedules, so that they are currently being evaluated by the educational authorities. [ABSTRACT FROM AUTHOR]

Formal specification is an active research field in software engineering of this century, where different configurations and techniques are employed and although their industrial use is still limited, the scientific community currently has a different understanding about its usefulness and necessity. Until present time, researchers' work focuses on the specification written during the design of the preliminary functional model, for this reason it mainly focuses on evaluating the related tools. In this paper, a literature review is performed, covering the essence, function, use and disadvantages of formal specification techniques and some assessment and evaluation criteria are analyzed regarding their weaknesses. The results become the basis for future work formulation, aimed to the strengthening of formal specification as a core research activity. [ABSTRACT FROM AUTHOR]

In this papers is presented research skills expected in students from careers with informatics profile computer regarding the Software Development Process seen from two perspectives: considering the first group work in the software development team and teams for professional roles, and second in software development as a Diploma Work but that in turn must take into account the Software Development Process. It shows what the research skills associated with professional roles of software analyst, developer, database administrator, software architect, underwriter quality software and technical reviewer (software tester). [ABSTRACT FROM AUTHOR]

This paper presents the results of statistical analysis of network traffic (in bits per second) from and to one university web server. Statistical analysis allows to know the hourly traffic trends and to establish a baseline for normal behavior. It documents, in addition, statistical goodness-fit tests results and analysis of variance, which provide elements that enhance the definition of the baseline. Finally, the outcomes are analyzed to determine its usefulness as intrusion detection mechanism or situations or behaviors that could suggest anomalies or atypical traffic. [ABSTRACT FROM AUTHOR]

The purpose of this article is to present a reference framework in the models and configurations of agricultural supply chains, specifically in perishables. The review was based on information research in the databases "ISI Web of Science", "Scopus" and "Science Direct", and the selection criterion of topics of interest. The paper presents some approaches to modeling and configuration of supply chains and the impact of the territory in their planning. The exploration established that the issue requires further study about configurations and their implications, for the design of models to improve logistic processes in agricultural supply chains of multiple producers, with diverse geographic locations in rural areas and needs to decrease operating costs. [ABSTRACT FROM AUTHOR]

The adoption of Service Oriented Architectures (SOA) by the companies shows high failure rates, mainly because of the way this paradigm is adopted. Thus, the complexity of this process should be addressed by using the evolutionary approach that maturity models offer. However, the diversity of maturity models makes difficult the selection and implementation of most of them. Taking this into account, the objective of this paper is to carry out a comparative analysis between the most representative maturity models and to determine whether they are sufficient in order to evaluating and planning the adoption of SOA with effectiveness. The inadequacies detected after a comprehensive assessment, restrict the evaluation and planning capacities that these models offer. In order to overcome them and using the international experience gained in this field, it were defined the constructs (principles, elements and structure) that support a more integral maturity model. [ABSTRACT FROM AUTHOR]

The University of Computer Sciences is responsible for the training of computer professionals as well as for the direct participation in the development of national computerization projects and export commitments as part of the industry. The integration model of formation-production- research processes expresses that students must perform a role in the software development process, linked to a real project. The objective of this paper is to establish a proposal of a methodology that systematizes the process of assigning students to a role. It has as a starting point the recruitment processes in the industry and a model for the comparison and prediction of student's behavior in each role. The methods used were document analysis, systemic method, among others. The analysis of the impact of the results of the methodology is analyzed and discussed. [ABSTRACT FROM AUTHOR]

This paper is part of an ongoing research which intends to analyze and describe the learning processes involved in the entrance to the computer science degree program at the Faculty of Mathematics, Astronomy and Physics of the Córdoba National University. The research conceives learning as a social, cultural, and historical situated process. In this article we communicate the answers to two questions that arose during the analysis of the data: What is learned during the first year at the degree program? Where is such learning oriented to? [ABSTRACT FROM AUTHOR]

This paper analyzes some experiences, previously reviewed in literature, about the use of robotics in education in order to obtain relevant models for the design of a proposal about robotics learning at Basic Secondary and Middle education levels. Two scopes of application of robotics in education are considered: firstly, learning robotics by defining the context of each robot subsystems and then creating robots for different purposes. The objective in this case is the development of skills for the design and construction of robotic artifacts, a process that implies the acquisition of the necessary knowledge to accomplish this task. The second scope of application is the use of robotics to encourage knowledge construction in different areas, fostering students' development ok skills and competences. Learning robotics and learning with robotics can be supported by computer science since this area provides software technology and tools such as Math Modeling and language simulation, Multimedia Tutorials, Virtual and Remote laboratories, among others. The purpose of this article is to highlight the importance of robotics in the classroom to enrich learning strategies which contribute to student's comprehensive education. This field of study has a growing demand by teachers and researchers, and stimulus to encourage its research, development and spread. [ABSTRACT FROM AUTHOR]

Although natural language processing can be deemed as a discipline between applied linguistics and artificial intelligence, theoretical linguistics has played a remarkably minor role in this field of research. One of the goals of this paper is to portray the reasons of the failed symbiosis between linguists' research and that of computer scientists, where probabilistic approaches haven been steadily overshadowing linguistic models. In spite of this discouraging scenario, FunGramKB, a knowledge base particularly designed for natural language understanding systems, serves to illustrate how a language-aware and cognitively-plausible approach to human-like processing can contribute to the development of enhanced knowledge-engineering projects. [ABSTRACT FROM AUTHOR]

This paper describes the methodological aspects of the construction of terminological subontologies within the architecture of FunGramKB. The main hypothesis is that the multilevel model of the Nuclear Ontology in FunGramKB (metaconceptual level, basic level and terminal level) can be connected to a terminological subontology in order to minimize redundancy and maximize information knowledge. One of the features of this subontology is, firstly, its implementation for the creation of a specialized module in the Ontology and, secondly, its focus on deep semantics, in contrast with the vast majority of terminological ontologies, which are based on surface semantics. [ABSTRACT FROM AUTHOR]

Most technical terms in the field of Computer Science are English loanwords. English words are frequently preferred to Spanish terms because of different reasons, for instance, because of linguistic economy. In this paper, we reveal the results of an empirical study about the frequency of use of pure anglicisms. It has been carried out among students of Translating and Interpreting at the University of Las Palmas de Gran Canaria (Spain). The scope of use of lexical anglicisms by individuals in the analysed sample seems to be relatively high, but slightly lower than that of Computer Science students who participated in another preliminary partial study. Those students who provided more words for definitions also suggested more synonyms for the terms, and also used more English terms. [ABSTRACT FROM AUTHOR]

This paper is part of an ongoing research which intends to analyze the experiences of beginner students of the Computer Science Careers of the Faculty of Mathematics, Astronomy and Physics of the Córdoba National University. During the first year of these careers the desertion level is high and there is an important percentage of students who can't past the exams. Using the situated learning theory proposed by Lave and Wenger (Lave, 1988; Lave & Wenger, 1991; Wenger, 1998) we want to describe the learning process that takes place during the encounter between beginner students just arrived to the university and the faculty community itself. We present a preliminary data analysis describing two analytic categories emerged in this first instance: «student- teacher relations and the legitimacies construction» and «identities construction». [ABSTRACT FROM AUTHOR]

The chemistry is present in the daily life to guarantee the continuous improvement of our quality of life and it constitutes, likewise, a discipline that is part of the curricular design of a great number of careers of engineering. With the use of the computers new learning sources have appeared for the teaching of the chemistry that they have revolutionized the traditional focus of this science and they have facilitated their approach to students for who it is such another people's discipline as not very interesting. This paper has as objective to carry out a proposal for the teaching of contents of chemistry with the use of didactic resources for virtual environments, such as educational games, laboratories, tutorials that motivate the students to negotiate with autonomy its own knowledge and this way to avoid a reproductive learning. With the application of the technologies of information and the communications (TIC) it is contributed to the teaching of the chemistry and they put on to the disposition of professors, of students, as well as of all that is interested by the chemistry, didactic resources for virtual environments that make understand that this science is nearer to us of what we imagine. [ABSTRACT FROM AUTHOR]

In the present paper will be presented to the reader how systemics and cybernetics are useful to structure a Systemic-Cybernetic Theory of Law (SCTL). By means of SCTL it will be possible to give an answer to diverse Philosophy of Law's questions, obtaining in this way a more complete vision of Law in comparison with others that have been offered. It will be exposed how the methodology and the systemic and cybernetic epistemologies enter into the juridical world, then there will be enumerated some characteristics of a possible SCTL and the answer that this new vision of Law offers for the juridical questions. The SCTL will constitute - we expect - the paradigm that the complexity of the topics and systems of (national, international, transnational, etc.) law requires to confront the crisis of its practical operation and of its scientific and philosophical researches. [ABSTRACT FROM AUTHOR]

Databases are tools to store and manage information, the better they are distributed, the easier and more efficient will its access be. At present, thanks to technological development of fields such as computer science and electronics, most of them have an electronic format, since they offer a wide rank of solutions to the store data problem. In this paper, we present the design and development of a database for range images, based on the relational model and a design methodology consisting of three steps: conceptual design, logical design, and physical design. The data base has a WEB access. A multi-resolution algorithm was developed to improve the time cost in visualization and renderization, by using decimation parameters based on the curvature. A WEB interface was developed in order to provide an easy access, consequently, it is possible to enter, update, and eliminate models on a reliable and simple way. At present, the database counts on 40 models divided in 3 categories: Faces (22), Museum (4) and objects of free form (14). The use of the multi-resolution algorithm allows saving up to 96% of computational cost. [ABSTRACT FROM AUTHOR]

Modeling and forecasting exchange rates is a big economic headache. This paper uses an artificial neuronal network model to represent the Colombian real exchange index dynamics because it describes the series dynamics better than a self-regressive linear model does, as may be appreciated in the result of the verosimilitud radius contrast. The model was accepted after applying a series of standard tests and contrasting the results against those obtained using a self-regressive linear model. The results indicated that the current value of a series solely depends on its previous value. [ABSTRACT FROM AUTHOR]

The main objective of the present paper is to expose the achievement of Superior Education in Cuba, particularly at Mathematics' Discipline in Technical careers, and discuss the influence of computer science technology and communication in the education changes that promote the third educational revolution in Cuba. [ABSTRACT FROM AUTHOR]

Unified Modeling Language, (UML) is a standard modeling language for general purposes, however it may be extended in order to represent specific domain such component-based architectures. This paper presents an extension using a profile for generic components and connectors-based architecture. [ABSTRACT FROM AUTHOR]

The basis of consistency check of architectural elements (components and connectors) in the generic component-based architecture is the definition of embedding and refinement relations for their internal relationships and interconnections. The ideas which are presented here constitute a guide for the automation of this architecture description using UML beginning with classes and sequence diagrams formal definition as well as consistency checking of components and connectors. This paper presents a plugin extension to Visual Paradigm which instruments this proposal. [ABSTRACT FROM AUTHOR]

Therefore the practical omnipresence of the informatics not only in each field of knowlegment but also in Architecture, nowadays it is discussing still about ways and minds for applying these technologies in architectural professional tasks. In this paper are defined clearly the premises and differences between the informatics products as CADs and SIGs available in the market and about how create specific systems with these softwares. [ABSTRACT FROM AUTHOR]

The purpose of this paper is to identify what the actors involved in the program "The computer in the school" understand by management, which is one of the dimensions that contributes to the effectiveness of this project and to educational quality. This program is coordinated by the Ministry of Education and the National Center for the Improvement of the Teaching of Science, CENAMEC. The study is integrated into the qualitative paradigm and has been presented in a descriptive exploratory format. A sample was taken of 7 of the 43 schools that are involved in the program on a national level. An analysis of the information obtained from secondary sources is presented as well as the sample results from the information gathered from the actors involved in the program. The factors which make up the management of the educational computer science program were identified from the perspective of the actors as well as in light of the importance that they have had in the execution of the project and in the fulfilment of project objectives. Managerial tasks that require improvement were also identified. [ABSTRACT FROM AUTHOR]