Journal of Information and Organizational Sciences

1-31

Authors: Gloria Arcos-Medina, David Mauricio

Agile practices are activities or actions that are utilized during software development to improve the quality and productivity of the resulting software. Those practices are influenced by a set of factors that affect the realization of their objectives. The purpose of this study is to determine the influence of organizational factors and the personnel working on the software development project to the agile practices. To this end, a model has been proposed that is composed of six critical success factors derived from the theories of administrative and human behavior and four groups of agile practices, and resulted in identifying 13 factor-practice relationships. The results from 146 questionnaires addressed to individuals involved in the software development process show that the factors of Confidence, Perception of Self-efficacy, Integrity and Availability of the Information and Experiences Learned, and Media Used all have a noteworthy positive influence on teamwork agile practices.

51-81

Authors: Hrvoje Karna, Sven Gotovac, Linda Vicković, Luka Mihanović

Turnover of the personnel represents a serious issue for management of software projects. The buildup of competences and phasing in of the people into the project requires both time and effort. This paper presents a case study of a large in-house agile software development project. The research goal was to determine the effects that turnover has on the expert effort estimation. In order to do this, paper examines relations across empirical data on a studied project. Study findings are the following: a) it is necessary to distinguish types of turnover, b) the general and planned turnover do not necessarily have a negative effect on estimation accuracy, and c) the unplanned turnover can have a significant negative impact on the reliability of the estimates and therefore should be treated with special attention. Results suggest that these facts should be taken into account both by the management and human resources.

113-139

Authors: Mbarek Marwan, Abdelkarim Ait Temghart, Fatima Sifou, Feda AlShahwan

Cloud computing is an easy-to-use, affordable solution to manage and analyze medical data. Therefore, this paradigm has gained wide acceptance in the healthcare sector as a cost-efficient way for a successful Electronic Medical Records (EMR) implementation. Cloud technology is, however, subject to increasing criticism because of the numerous security vulnerabilities. In this regard, we propose a framework to protect confidential data through the development of new security measures, including compression, secret share scheme and XOR operation. The primary objective of the proposal is to achieve the right balance between security and usability. To this aim, we divide an image into several blocks and then encrypt each piece separately with different cryptographic keys. To enhance privacy and performance, we suggest DepSky architecture to keep data on various storage nodes. Simulation experiments have been conducted to prove the effectiveness of the proposed methodology.

157-170

Authors: Mugdha Sharma, Laxmi Ahuja, Vinay Kumar

The proposed research work is an effort to provide accurate movie recommendations to a group of users with the help of a rule-based content-based group recommender system. The whole approach is categorized into 2 phases. In phase 1, a rule- based approach has been proposed which considers the users’ viewing history to provide the Rule Base for every individual user. In phase 2, a novel group recommendation system has been proposed which considers the ratings of the movies as per the rule base generated in phase 1. Phase 2 also considers the weightage of every individual member of the group to provide the accurate movie recommendation to that particular group of users. The results of experimental setup also establish the fact that the proposed system provides more accurate outcomes in terms of precision and recall over other rule learning algorithms such as C4.5.

185-198

Authors: Dejan Viduka, Vladimir Kraguljac, Igor Lavrnić

Nowadays the IT market is enriched with free Open Source Web Content Systems offers that are available to all users. No system is perfect, and some of them have better solutions in one segment but are more vulnerable in others and vice versa, all in order to be more user-friendly. The most common form of Content Management System (CMS) implemented on the Internet today is the Web Content Management System(WCMS). This solution includes numerous advantages for site administrators as well as communication with the site designer for all users in order to improve the content, through written remarks, opinions and evaluations of the site content, resulting in a more dynamic and interactive site. This modern approach offers users with a poor IT background the opportunity to be independent and creative in creating their own website. In this paper we present data collected from several websites monitored for various cyber-attacks. Moreover, we will describe and analyze security challenges that follow cyber-attacks. During the monitoring process we followed 15 web addresses over a period of nine months and collected 520 reports of various cyber-attacks. The following analysis presents the different kinds of attacks, their frequency and some of the ways to reduce cyber-attacks to the lowest possible level.