Database Systems Journal

ISSN 2069 - 3230

The journal is published under the sponsorship of
The Bucharest University of Economic Studies
and it is produced by the university's own publishing division,
The Bucharest University of Economic Studies Publishing House

Database Systems Journal, Vol. III, Issue 3/2012
Issue Topic: Database and cloud computing

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1. ERP and E-Business Application Deployment in Open Source Distributed Cloud Systems (p. 3-12)
George SUCIU, Politehnica University of Bucharest, Romania
Traian-Lucian MILITARU, Politehnica University of Bucharest, Romania
Gyorgy TODORAN, Politehnica University of Bucharest, Romania
In this paper we present the way in which we combine SlapOS, the fist open source operating system for distributed cloud computing, and Enterprise Resource Modeling (ERP) to provide an simple, unified API for E-Business Applications based on Iaas, PaaS and SaaS models. SlapOS is based on a grid computing daemon – called slapgrid – which is capable of installing any software on a PC and instantiate any number of processes of potentially infinite duration of any installed software using a master-slave model. SlapOS Master follows an ERP model to handle at the same time process allocation optimization and billing.
Keywords: Cloud, ERP, IaaS, PaaS, SaaS, Open Source.
2. Management information systems. A case study over the last eight years in the Romanian organizations (p. 13-22)
Eduard EDELHAUSER, Management Department, University of Petrosani, Romania
Lucian LUPU-DIMA, Info 98 Computing Centre Company, Petrosani, Romania
The present interest of this paper consists in the powerful impact that IT&C technologies have upon the development of the last 20 years of the Romanian organizations as well as upon the daily life of each individual in the special condition of the Romanian economy and especially Romanian society as a whole. The motivation of the approach is supported by the fact that IT&C industry has had an explosive development during the last 20 years in Romania. Accordingly, this industry represents 10% of Romania’s gross domestic product, a quite high percent in case one notices that not long ago it represented only 3%.
Keywords: IT&C Industry, Management and Information Technology, Enterprise Resource Planning, Business Intelligence, Romanian Resource Company.
3. Pentaho Business Analytics: a Business Intelligence Open Source Alternative (p. 23-34)
Diana TARNAVEANU, Faculty of Economics and Business Administration, West University of Timisoara, Timisoara, Romania
Most organizations strive to obtain fast, interactive and insightful analytics in order to fundament the most effective and profitable decisions. They need to incorporate huge amounts of data in order to run analysis based on queries and reports with collaborative capabilities. The large variety of Business Intelligence solutions on the market makes it very difficult for organizations to select one and evaluate the impact of the selected solution to the organization. The need of a strategy to help organization chose the best solution for investment emerges. In the past, Business Intelligence (BI) market was dominated by closed source and commercial tools, but in the last years open source solutions developed everywhere. An Open Source Business Intelligence solution can be an option due to time-sensitive, sprawling requirements and tightening budgets. This paper presents a practical solution implemented in a suite of Open Source Business Intelligence products called Pentaho Business Analytics, which provides data integration, OLAP services, reporting, dashboarding, data mining and ETL capabilities. The study conducted in this paper suggests that the open source phenomenon could become a valid alternative to commercial platforms within the BI context.
Keywords: Business Intelligence (BI), Decision-making, Data Analysis, Data Warehouses.
4. New e-learning method using databases (p. 35-46)
Andreea IONESCU, University of Economic Studies, Bucharest, Romania
The objective of this paper is to present a new e-learning method that use databases. The solution could pe implemented for any typeof e-learning system in any domain. The article will purpose a solution to improve the learning process for virtual classes.
Keywords: Virtual Classes, AJAX, Dynamic Web Language, Databases, e-Learning.
5. Integrated Information System for Higher Education Qualifications (p. 47-56)
Catalin Ionut SILVESTRU, University of Economic Studies, Bucharest, Romania
Codrin-Florentin NISIOIU, University of Economic Studies, Bucharest, Romania
Bogdan GHILIC-MICU, University of Economic Studies, Bucharest, Romania
Ramona Camelia BERE, University of Economic Studies, Bucharest, Romania
Adina-Maria DAN, Babes-Bolyai University, Cluj-Napoca, Romania
Robert MIHAILA, University of Economic Studies, Bucharest, Romania
In the present article we aim to study thoroughly and detail aspects related to architectures specific for e-learning and management of human resources training interconnected to management of qualifications. In addition, we take into consideration combining e-learning architectures with software in an e-learning system interconnected with the National Registry of Qualifications of Higher Education, in view of developing and information system that correlates educational supply from higher education from Romania with labor market demands through qualifications. The scientific endeavor consists of original architectural solutions to integrate data, systems, processes, services from various sources and to use them in the proposed system. The practical result of the scientific endeavor is represented by design of architectures required for developing an e-learning system interconnected with the National Registry of Qualifications from Romania, which involve in first stage the qualifications provided by higher education. The proposed innovative solution consists in the fact that the proposed information system combines the advantages of content management system (CMS) with learning content management system (LCMS) and with reusable learning objects (RLO). Thus, the architecture proposed in the research ensures the integration of a content management system with a portal for information, guidance and support in making a professional project. The integration enables correlation of competences with content areas and specific items from various teaching subjects, thus evaluating the usefulness for this registry from learning/educational perspective. Using the proposed information system in enables correlation among qualifications, content of educational program and continuous self-evaluation opportunities, which facilitate monitoring of progress and adjustment of learning content.
Keywords: Qualifications Integrated Information System, Learning Content Management System, Reusable Learning Objects.
6. Cloud Computing and Smart Grids (p. 57-66)
Janina POPEANGA, University of Economic Studies, Bucharest, Romania
Increasing concern about energy consumption is leading to infrastructure that supports real-time, two-way communication between utilities and consumers, and allows software systems at both ends to control and manage power use. To manage communications to millions of endpoints in a secure, scalable and highly-available environment and to achieve these twin goals of ‘energy conservation’ and ‘demand response’, utilities must extend the same communication network management processes and tools used in the data center to the field. This paper proposes that cloud computing technology, because of its low cost, flexible and redundant architecture and fast response time, has the functionality needed to provide the security, interoperability and performance required for large-scale smart grid applications.
Keywords: Energy Efficiency, Smart Grid, Cloud Computing.
7. Data mining in Cloud Computing (p. 67-71)
Ruxandra-Stefania PETRE, University of Economic Studies, Bucharest, Romania
This paper describes how data mining is used in cloud computing. Data Mining is used for extracting potentially useful information from raw data. The integration of data mining techniques into normal day-to-day activities has become common place. Every day people are confronted with targeted advertising, and data mining techniques help businesses to become more efficient by reducing costs. Data mining techniques and applications are very much needed in the cloud computing paradigm. The implementation of data mining techniques through Cloud computing will allow the users to retrieve meaningful information from virtually integrated data warehouse that reduces the costs of infrastructure and storage.
Keywords: Cloud Computing, Data mining.