Salesian Journal on Information Systems

6

Authors: MELO JR., A. ADÁN-COELLO, J. M

The Proportional Differentiation Model (PDM) is currently one of the main service proposals for the Next Generation Internet. This paper presents a new packet scheduling algorithm for implementing the PDM model using measurement windows and a mechanism of dynamic adjustment of packet delay estimation. Window Based Waiting-Time Priority Plus (WBWTP+), the proposed algorithm, is an evolution of the WBWTP algorithm that adjusts dynamically the relative weights of transmitted and waiting for transmission packets according to the current state of the system. The WBWTP+ delay estimator makes possible to accelerate or to delay the transmission of backlogged packets. Simulations performed to asses the performance of the WBWTP+ show that it presents significant improvement in the attendance of the PDM objective in relation to WBWTP in most scenarios, excepted when the link utilization rate is 100%. Even in that case the performance of WBWTP+ was better than that of WTP and PAD algorithms.

9

Authors: BOLINA, A. C., PEREIRA, D. A., ESMIN, A. A. A., PEREIRA, M. R. et al.

The main goal of data mining is to discover relevant information on digital content. The Apriori algorithm is widely used to this objective, but its sequential version has a low performance when execu- ted over large volumes of data. Among the solutions for this problem is the parallel implementation of the algorithm, and among the parallel implementations presented in the literature that based on Apriori, it highlights the DPA (Distributed Parallel Apriori) [10]. This paper presents the DMTA (Distributed Multithread Apriori) algorithm, which is based on DPA and exploits the parallelism level of threads in order to increase the performance. Besides, DMTA can be executed over heterogeneous hardware platform, using different number of cores. The results showed that DMTA outperforms DPA, presents load balance among processes and threads, and it is effective in current multicore architectures.

10

Authors: ANDRADE, A., JOST, T., RIGHI, R. et al.

Electronic Funds Transfer represents an upward trend, which fosters the proximity among consumers and suppliers. Each transaction is sent to a Computer Center, in charge of decoding, processing and returning the results as fast as possible. Particularly, the present article covers the GetNet Company day-by-day, focusing on one of their subsystems. In the article, we model the incoming transaction volume and the corresponding processing to answer the following questions: (i) how is the idleness of the company transaction system settings and what are the rates involed on that? (ii) Given an annual growth of 20% in the transaction volume, which modifications should be made in the current Computer Center to fulfill the need in terms of transactions until 2020? The tests were based on transactions execution logs during one day, which corresponds to the greater volume of 2011. As expected, the results show that the 10 machines composing GetNet system are overestimated for the current situation, which could support the operational load with only 4 machines. In addition, the current configuration could be sustained, regarding the growth predicted before, until the middle of 2017 without loss of transactions.

2

Authors: LINDEN, R.

This is Book review for the book titled "Como Vencer na Universidade", by José Palazzo Moreira de Oliveira (In portuguese)

8

Authors: LIMA, I. R., FREIRE, T. C., COSTA, H. A. X.

Agile software development has gained importance in the industry because of its approach on the issues of human agility and return on investment. This paper shows how Scrum agile software project management methodology has been deployed and adapted to the model of software project management of a research and development laboratory. As a result of this deployment, experiences and lessons learned in seven real projects developed by the authors are reported.

13

Authors: GONZAGA DE OLIVEIRA, S. L.

In this paper, an overview on subjects and its matching reference books for the teaching of two algorithm classes in undergraduate courses on Computer Science, Computer Engineering, Information Systems, Computer Science Teaching, Software Engineering and other similar ones is given. Complementary literature for these subjects are also recommended.

2

Authors: LINDEN, R.

This is a review for the book titled Governança dos novos serviços de TI na copa by Ricardo Mansur.

5

Authors: Taurion, C.

In this paper we discuss the concept of a smart city and the importance of huge Sport events as an incentive to the creation of the infrastructure necessary for the development of cities that provide quality of life for all its citizens using information technology.

9

Authors: MARTÍN, A., LEÓN, C., LÓPEZ, A.

Due to the increasing complexity and heterogeneity of networks and services, many efforts have been made to develop intelligent techniques for management. Network intelligent management is a key technology for operating large heterogeneous data transmission networks. This paper presents a proposal for an architecture that integrates management object specifications and the knowledge of expert systems. We present a new approach named Integrated Expert Management, for learning objects based on expert management rules and describe the design and implementation of an integrated intelligent management platform based on OSI and Internet management models. The main contributions of our approach is the integration of both expert system and managed models, so we can make use of them to construct more flexible intelligent management network. The prototype SONAP (Software for Network Assistant and Performance) is accuracy-aware since it can control and manage a network. We have tested our system on real data to the fault diagnostic in a telecommunication system of a power utility. The results validate the model and show a significant improvement with respect to the number of rules and the error rate in others systems.

9

Authors: OLIVEIRA, O. C. S.; NUNES, M. A. S. N; CAZELLA, S. C. et al.

Considering how hard it is to provide more assertive and personalized information, products and service for people/tourists who are searching for a service, such as: having lunch/dinner, searching what's hot about films in theaters right now in the "Olympic villa", for instance. In order to fill this gap this paper describes a Recommendation System (RS) that applies contextual information and people' personality as recommender inputs in order to predict more personalized films for Cinemark's clients (Personal_Movie). In order to illustrate our discussion we present an experiment that uses a software for mobile that uses geo-location and people's personality to further improve the quality of the film recommendation. The experiment has shown promising results and its potential in the generation of more assertive recommendation. We believe the results might by asl applicable for other products and services requested in Brazilian mega events

1

Authors: Linden, R.

This is a book Review for the book titled "Lógica para Computação" by Flávio Soares C. da Silva, Marcelo Finger and Ana Cristina V. de Melo"

5

Authors: KROHLING, R. A.; SOUZA, T. T.M.

In this work, we apply the Technique to Order Preference by Similarity to Ideal Solution (TOPSIS) to two case studies. The first example is concerned with the evaluation of the best response alternatives in case of accidental oil spill in the sea. The second example considers the rental evaluation of residential properties. Simulations results are promising and show the feasibility of the technique.

9

Authors: Vieira, A.

In this work we present some guidelines and advices concerning preparation, presentation and writing of scientific and technical texts. Particular attention is given to college level reports. Some principles and effective examples are given.

14

Authors: WESTPHALL, C. B; WESTPHALL, C. M; KOCH, F. L.; ROLIM, C. O; VIEIRA, K. M.; SCHULTER, A.; CHAVES, S. A.; WERNER, J.; MENDES, R. S.; BRINHOSA, R. B.; GERONIMO, G. A.; FREITAS, R. R.

This paper present a number of research initiatives related to innovative and cut-edge technologies for Cloud Computing. These are chiefly in the fields of (i) environment security, (ii) quality assurance, (iii) service composition, and (iv) system management. We present technologies for intrusion detection; a SLA perspective in security management; customer security concerns; a Cloud-based solution for eHealth; experimental assessment of routing for grid and cloud; simulator improvements to validate the green cloud computing approach, and; a framework to radio layer operation in cognitive networks.

1

Authors: Linden. R.

This a Book Review for the book title "Método lógico para Redação Científica", by Gilson Volpato

7

Authors: RIBEIRO, D. M.; ALMEIDA NETO, H.R.; GARCIA, V. C.

Juniors Enterprises have their own particularities in managing of their projects. Scarcity of resources and lack of experience of its members are critics and typical factors in the daily life of these companies. However, these and other variables such as the time for return on investment, project complexity and runtime of the project, must be taken into consideration in the prioritization of the outstanding portfolio projects to maximize desired outcomes. The Portfolio Management aims to provide the company a better allocation of resources in an environment with multiple projects going simultaneously. The model proposed here seeks a link between projects and organizational strategy. In this Paper also are presented the results of applying the model on Upe consultoria JR.

10

Authors: MENDES, A. J. B.; PAULICENA, E. H., SOUZA, W. A. R

This study aims to answer directly to four questions relating to knowledge of what Quantum Cryptography is. The text is developed through a historical overview of the encryption of messages, reaching asymmetric encryption, a solution to the problem of production and distribution of keys. Afterwards, inserted in a quantum scope, it defines and exemplifies protocols of quantum cryptography, showing, in conclusion, the responses required.