Requirement engineering of a Cooperative Information System using viewpoints

International audienceIn this paper we are interested in cooperative infor-mation systems (CIS) in inter-organizational environments. They are information systems on a large scale, which con-nect different organizations, often autonomous, sharing common goals, forming in this case inter-organizational system (IOS). In order to develop a CIS, we propose a Vp-CIs approach, which incorporates a notion of software en-gineering, which are the viewpoints from the needs analysis phase to describe their requirements and needs. This ap-proach defines a meta-model of viewpoint, which enable us to instantiate the viewpoints necessary to identify the needs and requirements of a CIS

Viewpoints and goals: towards an integrated approach

Dissertação de Mestrado em Engenharia InformáticaRequirements elicitation and analysis have been studied according to several approaches that differ mostly on their "orientation", in this case relying on goals or viewpoints. Goal-Oriented approaches such as KAOS rely on goals to direct their process of eliciting requirements: a goal is an objective the system under consideration should achieve and represents a system property that may reflect either a functional (e.g. a service provided by the system) or a non-functional (e.g. security, performance) requirement; its satisfaction may imply the participation of several agents and the resolution of possible obstacles that may arise. The KAOS approach offers an unambiguous method for requirement decomposition and may provide a set of heuristics to approaches where one does not exist. Viewpoint-Oriented approaches such as PREview focus on gathering information pertaining to the problem from several agents that may have different, often equally valid, and incomplete perspectives on the problem. These partial intakes reflect their different responsibilities, roles, goals, or interpretations of the information sources; hence the combination of the agent and its input on the system is called a viewpoint. PREview benefits from a particularly lightweight approach to requirements encapsulation, but fails to provide a set of heuristics for the process of identifying the system's requirements. Considering the issues identified in each approach, it is verifiable that both approaches are complementary: on the one hand, KAOS offers a set of requirements elicitation heuristics through goal decomposition; on the other hand, PREview is a lightweight approach to viewpoint oriented requirements engineering, tailored especially for integration, however lacks a more systematic mechanism to guide the requirements elicitation process. The objective of this dissertation is therefore to propose a hybrid approach that builds on the PREview approach and brings together the benefits of the KAOS approach. The result is synergetic where, for example, completion is better addressed by providing a set of heuristics for requirement elicitation

UTILIZATION OF MILK WITH PENICILLIN ANTIBIOTIC RESIDUES BY YOGURT FERMENTATION

Antibiotic residues in milk are problem for consumer and daby farmer, discard this milk will be loss for dairy farmer and environment pollution. Penicillin are most antibiotic residues In milk Yogurt is milk fermented milk with starter of Streptococcus thermophilus and Lactobacillus bulgaricus. Penicillin residues in milk will reduce starter activity and finalIy unsuccessful these process. The purpose of this study was to determine penicillin level in milk which is possible to produce yogurt, evaluation of decreasing Penicillin residues level in yoghurt, relationship between starter, antibiotic residues and yoghurt quality. Complete Randomized Design, consist of two factor (penicillin residues : 0,0 1 / ml, 2,0 IU / ml, 4,01U/ / ml, 8,0 IU / m4 0,0 IU / ml and 10 IU / ml and starter concentration : 5 %, 7,5%, 10% and 12,5% ). The study indicated that milk with penicillin residues 10 IU/ml, with starter ( 7,5 % - 12,5% ) are still succes to produce yoghurt and to clear up penicillin residues in mil

Efficiency of e-learning in an information literacy course for medical students at the Masaryk University

Purpose: The main goal of this paper is to argue E-learning can be a viable alternative teaching method for Information Literacy according to a comparation of librarian’s time spent face-to-face teaching with tutoring the E-learning course, average time spent a week on learning by the students, time flexibility of E-learning, students’ satisfaction with E-learning and students’ ability to gain practical skills and theoretical knowledge through E-learning. Design/methodology/approach: Satisfaction of medical students with E-learning and their average weekly time spent learning was assessed through surveys designed in Google Documents. Weekly time spent by students learning in class and the number of librarian teaching hours were set by the university schedule and time spent on tutoring E-learning was measured. Details of accesses to study materials and submission of tasks as well as exam results were collected from Masaryk University Learning Management System. Findings: In 2011 50% less time was expended on tutoring E-learning than time spent with the same number of students in the previous three years in the classroom. One third of the students learned for more hours a week with E-learning than students in class. No significant difference in gained theoretical knowledge between these students was found. On average 90% of tasks submitted to E-learning were correct the first time. E-learning was appreciated by the students for its time (93%) and space (83 %) flexibility, the online materials (62%) and self-managing learning time (55%). Details of access to the study materials confirmed time flexibility. Originality/value: Due to time saved and considering the lack of any significant difference in the knowledge gained by students, E-learning can be a viable alternative teaching method for Information Literacy

Requirements elicitation techniques for software development: a systematic review of literature

Introduction: Requirements elicitation (RE) is a difficult task in which there are issues related to information ambiguity, incomplete and inconsistent data. It seeks to discover and understand the users' problems and needs. The success of software development depends on the correct elicitation of requirements, and its quality is influenced by the techniques used.  This research aims to identify the RE techniques most cited in the literature of software development projects within this context. Method: a systematic literature review was carried out, which analyzed 61 articles from the Scopus database. Results: We identified the 10 RE techniques most cited in the literature. The ranking of these techniques showed that those obtained by stakeholders' groups' involvement were the least mentioned. Conclusions: the research identified the opportunity and relevance for developing a descriptive or confirmatory analysis of RE techniques based on the interaction between groups of users and members of the software development team.Introdução: A elicitação de requisitos (ER) é uma tarefa difícil na qual é necessário lidar com ambiguidade de informações, dados incompletos e inconsistentes. Ela busca descobrir e entender o real problema e as necessidades dos usuários. O sucesso do desenvolvimento de software depende da elicitação correta dos requisitos, e a qualidade deles é influenciada pelas técnicas usadas. Dentro deste contexto, o objetivo desta pesquisa é identificar as técnicas de ER mais citadas na literatura em projetos de desenvolvimento de software. Método: Foi realizada uma revisão sistemática da literatura, que analisou 61 artigos da base de dados Scopus. Resultados: Foram identificadas as 10 técnicas de ER mais citadas na literatura. A classificação dessas técnicas mostrou que aquelas obtidas pelo envolvimento de grupos de stakeholders foram as menos citadas. Conclusão: A pesquisa identificou a oportunidade e relevância para o desenvolvimento de pesquisa acadêmica descritiva ou confirmatória sobre técnicas de ER baseadas na interação entre grupos de usuários e membros da equipe de desenvolvimento de software

Joint Inference on Truth/Rumor and Their Sources in Social Networks

In the contemporary era of information explosion, we are often faced with the mixture of massive \emph{truth} (true information) and \emph{rumor} (false information) flooded over social networks. Under such circumstances, it is very essential to infer whether each claim (e.g., news, messages) is a truth or a rumor, and identify their \emph{sources}, i.e., the users who initially spread those claims. While most prior arts have been dedicated to the two tasks respectively, this paper aims to offer the joint inference on truth/rumor and their sources. Our insight is that a joint inference can enhance the mutual performance on both sides. To this end, we propose a framework named SourceCR, which alternates between two modules, i.e., \emph{credibility-reliability training} for truth/rumor inference and \emph{division-querying} for source detection, in an iterative manner. To elaborate, the former module performs a simultaneous estimation of claim credibility and user reliability by virtue of an Expectation Maximization algorithm, which takes the source reliability outputted from the latter module as the initial input. Meanwhile, the latter module divides the network into two different subnetworks labeled via the claim credibility, and in each subnetwork launches source detection by applying querying of theoretical budget guarantee to the users selected via the estimated reliability from the former module. The proposed SourceCR is provably convergent, and algorithmic implementable with reasonable computational complexity. We empirically validate the effectiveness of the proposed framework in both synthetic and real datasets, where the joint inference leads to an up to 35\% accuracy of credibility gain and 29\% source detection rate gain compared with the separate counterparts

Differentiator factors in the implementation of social network sites

Estágio realizado na Business Analyst da Documento Crítico - Desenvolvimento de Software, S. A. (Cardmobili) e orientado pelo Eng.ª Catarina MaiaTese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 200

Motivating Factors and Barriers to the Online Faculty Professional Development

A capstone submitted in partial fulfillment of the requirements for the degree of Doctor of Education in the College of Education at Morehead State University by Kathryn L. Miller on April 16, 2015