Applying Absolute Residuals as Evaluation Criterion for Estimating the Development Time of Software Projects by Means of a Neuro-Fuzzy Approach
Noel García-Díaz, Alberto Verduzo-Ramirez, Juan Garcia-Virgen, Lilia Muñoz
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 46
https://doi.org/10.20897/lectito.201646
Research Article
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ABSTRACT
In the software development field, software practitioners expend between 30% and 40% more effort than is predicted. Accordingly, researchers have proposed new models for estimating the development effort such that the estimations of these models are close to actual ones. In this study, an application based on a new neuro-fuzzy system (NFS) is analyzed. The NFS accuracy was compared to that of a statistical multiple linear regression (MLR) model. The criterion for evaluating the accuracy of estimation models has mainly been the Magnitude of Relative Error (MRE), however, it was recently found that MRE is asymmetric, and the use of Absolute Residuals (AR) has been proposed, therefore, in this study, the accuracy results of the NFS and MLR were based on AR. After a statistical paired t-test was performed, results showed that accuracy of the New-NFS is statistically better than that of the MLR at the 99% confidence level. It can be concluded that a new-NFS could be used for predicting the effort of software development projects when they have been individually developed on a disciplined process.
Keywords: Artificial neural networks, fuzzy logic, neuro-fuzzy system, Software effort estimation, absolute residuals
Proposed methodology for learning english with the use of TICs. Case: Universidad Tecnológica Equinoccial
Nelson Salgado Reyes, Héctor Sanchez Santamaria, Mercedes Rico Garcia
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 47
https://doi.org/10.20897/lectito.201647
Research Article
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ABSTRACT
The study presents a proposal for Learning English as a Foreign Language at the "Universidad Tecnológica Equinoccial" (UTE), making use of the Information Technology and based on a previous pedagogical and technological analysis. Internal diagnostics assessed the use of virtual platforms used at UTE and deepened with a diagnostic field research, interviews with some teachers and students, a total of 3072 students and 27 teachers. From the results, a methodological proposal that presents the tools used, components, evaluation, a class structure and practices to be applied to improve Learning English is made. The methodology emphasizes the oral production and listening, through permanent Practices and Activities.
Keywords: English learning, methodology, TICs, technological resources, UTE
Visualization System for Monitoring Data Management Systems
Emanuel Pinho, Alexandre Carvalho
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 48
https://doi.org/10.20897/lectito.201648
Research Article
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ABSTRACT
Usually, a Big Data system has a monitoring system for performance evaluation and error prevention. There are some disadvantages in the way that these tools display the information and its targeted approach to physical components. The main goal is to study visual and interactive mechanisms that allow the representation of monitoring data in grid computing environments, providing the end-user information, which can contribute objectively to the system analysis. This paper is an extension of the paper presented at (Pinho and Carvalho 2016) and has the purpose to present the state of the art, carries out the proposed solution and present the achieved goals.
Keywords: Grid computing, Monitoring, Human-machine interaction, Graphical, Visual
Smartphone Application for Enhanced Indoor Health Environments
Gonçalo M. S. Marques, Rui Pitarma
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 49
https://doi.org/10.20897/lectito.201649
Research Article
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ABSTRACT
The reduced air quality inside buildings is undoubtedly a key factor to be controlled to ensure the health and comfort of the occupants as people usually spend more than 90% of their time in indoor environments. This paper aims to present iAQ an automatic system that is capable to monitoring indoor air quality and send real time notifications to provide active coaching for occupants in order to improve indoor air quality. iAQ is a cost effective solution for indoor air quality monitoring and provide monitoring data access by a web portal and a mobile application. This system is equipped is a five cost effective sensors for data acquisition of environmental parameters (air temperature, humidity, carbon monoxide, carbon dioxide and luminosity). Other sensors can be added to monitor specific pollutants. iAQ assumes increased interest due to the use of low cost and open source technologies. In fact, iAQ system has advantages in terms of simplicity of installation and configuration, through the use of wireless technology.
Keywords: Indoor air quality, indoor environment, air quality monitoring, wireless sensor network, ZigBee, Arduino, gas sensors, smart cities
Web Site Accessibility, Quality and Vulnerability Assessment: a Survey of Government Web Sites in the Turkish Republic
Yakup Akgul
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 50
https://doi.org/10.20897/lectito.201650
Research Article
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Websites have evolved into an excellent medium of information dissemination and visibility. Hence governments and organizations around the world have websites as primary medium for information communication. The information in government web sites, which are widely adopted in many countries, must be accessible for all people, easy to use, accurate and secure. Since the web is an important resource of information for millions of people at all levels, accessible websites can help people with disabilities too to participate and contribute more actively in society. In recent years, many people have devoted their efforts to the issue of quality of Web site. The Quality and reliability of the e-government website is a crucial factor for the successful implementation of the information society. In this study the effectiveness of various design parameters (HTML errors, load time and browser compatibility problems etc.) on e-government website will be analysed by taking into considerations different website development standards recommended for them. The main objective of this study is to investigate the usability, accessibility and vulnerability of e-government web sites in Turkish Republic. Analysis was conducted using several automatic evaluation tools. The evaluation results show that the examined e-Government services have one or more accessibility issues. The results indicated that there is an urgent need to improve the design features of e-government website in order to be more effective and user-centric. The study also revealed security vulnerabilities in these web sites. Although the Turkish Ministry of Family and Social Policies as the framework for defining Web accessibility policy was launched at 2001, government web sites in the Turkish Republic have not been reviewed and still need great efforts to improve accessibility, usability and security. The author took 51 Government websites of Turkey, analyse their different parameters and on the basis of analysis shows their overall compliance with the standards and guidelines. With the help of the results obtained a table analysis of the websites is made by the authors that determine the effect of these parameters on the efficiency and accessibility of the government websites.
Keywords: e-government, website design, website evaluation, website standards, website guidelines, vulnerability assessment
Supporting GUI Exploration through USS Tool
José Luís Silva, J. D. Ornelas, J. C. Silva
J INFORM SYSTEMS ENG, Volume 1, Issue 4, Article No: 51
https://doi.org/10.20897/lectito.201651
Research Article
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ABSTRACT
Advances in usability and design techniques (e.g. user-centered design) try to facilitate the use of interactive systems. However, users still have to adapt to interactive systems, i.e. they have to learn the steps required to accomplish a task either by trial and error or by obtaining help. While advanced users are usually able to adapt without much effort this is far from being the case with beginners. Some interactive systems offer different interaction styles in an attempt to meet the needs of all types of user but this is not the case with all interactive systems. In this sense, we present an approach to support the use of any interactive system making use of enriched models and picture-driven computing to achieve tasks automation. The USS tool (User Support System) is the basis to the adaptation of interactive systems accordingly to the users' needs. The approach provides the foundation for the addition of help (based on demonstration) to any graphical user interfaces (GUI) facilitating learning and use. The work is illustrated by a case study and completed with a preliminary user evaluation which provides insights about the validity of the approach.
Keywords: Interactive systems, Picture-driven computing, Automation, Task Modeling, User support system