Informatica Economica Vol. 18 No. 2/2014

Issue Topic: Data visualization

Issue Editor: Cristian IONITA, PhD

CONTENTS

Social Engineering a General Approach
Valerica GREAVU-SERBAN, Oana SERBAN 5
Social engineering is considered to be a taboo subject in nowadays society. It involves the use of social skills or to obtain usernames, passwords, credit card data, or to compromise or altering the information and systems of an entity. Social engineering methods are numerous and people using it are extremely ingenious and adaptable. This technique takes advantage of the intrinsic nature of mankind, to manipulate and obtain sensitive information, persuading people into divulge it, using exceptional communication skills. Thus, five models of persuasion were identified, based on: simplicity, interest, incongruity, confidence and empathy, exploiting key factors which predispose people to fall victim to attacks of social engineering such as greed, self-interest, guilt or ignorance. It is well known fact that security is as strong as the weakest link in its chain (individuals) therefore, beyond technical measures, staff training is the key to success in defending against such attacks.
Keywords: Social Engineering, Persuasion, Trust, Risk, Sensitive Information, Online Security, Confidence, Manipulation, Attack, Staff Training

User Identification Framework in Social Network Services Environment
Brijesh BAKARIYA, G.S. THAKUR 15
Social Network Service is a one of the service where people may communicate with one an-other; and may also exchange messages even of any type of audio or video communication. Social Network Service as name suggests a type of network. Such type of web application plays a dominant role in internet technology. In such type of online community, people may share their common interest. Facebook LinkedIn, orkut and many more are the Social Network Service and it is good medium of making link with people having unique or common interest and goals. But the problem of privacy protection is a big issue in today’s world. As social networking sites allows anonymous users to share information of other stuffs. Due to which cybercrime is also increasing to a rapid extent. In this article we preprocessed the web log data of Social Network Services and assemble that data on the basis of image file format like jpg, jpeg, gif, png, bmp etc. and also propose a framework for victim’s identification.
Keywords: Preprocessing, Web Log Data, Social Network Service, Data Mining, Cyber Crime

Implementing Mobile Virtual Exhibition to Increase Cultural Heritage Visibility
Cristian CIUREA, Alin ZAMFIROIU, Alin GROSU 24
The paper presents an implementation of iOS mobile application designed as a virtual exhibition, which aims to increase the accessibility and visibility of physical objects that composite cultural heritage elements. Mobile technologies have seen a huge evolution in the last years and people are very attracted by smartphones, tablets and other mobile devices. Taking into consideration the impact of mobile technologies in all the activity fields, an important research objective is to analyze the influence of mobile applications designed as virtual exhibitions on cultural heritage promotion and on people cultural needs.
Keywords: Mobile Application, Virtual Exhibition, Cultural Heritage

Collaborative Environment and Agile Development
Bogdan GHILIC-MICU, Marian STOICA, Marinela MIRCEA 32
Over time, information and communications technology development has made a direct impact on human activity in the individual context as well as familial, economic and social. This has laid the premise for adoption of new and modern paradigms in individual and organizational activity management. The evolutionary climax of the social universe is called nowadays knowledge society. The knowledge society succeeds the information society, emphasizing the development of the opportunities brought by collaborative work environment and agile approach. In this paper we will highlight the use of collaborative environment in agile software development, as an instrument for managing organizations in knowledge society. Thus, we will emphasize the paradigms of agile testing, validation and verification in collaborative environment.
Keywords: Collaborative Environment, Knowledge Society, Agile Development, Testing, Validation, Verification, Management, Information and Communication Technology

Alternative Strategies in Learning Nonlinear Soft Margin Support Vector Machines
Catalina COCIANU, Luminita STATE, Cristian USCATU 42
The aims of the paper are multifold, to propose a new method to determine a suitable value of the bias corresponding to the soft margin SVM classifier and to experimentally evaluate the quality of the found value against one of the standard expression of the bias computed in terms of the support vectors. Also, it is proposed a variant of the Platt’s SMO algorithm to compute an approximation of the optimal solution of the SVM QP-problem. The new method for computing a more suitable value of the bias is based on genetic search. In order to evaluate the quality of the proposed method from the point of view of recognition and generalization rates, several tests were performed, some of the results being reported in the final section of the paper.
Keywords: Non-Linear Support Vector Machines, Kernel Function, Radial Basis Function, Soft Margin SVM, SMO Platt’s Algorithm, Genetic Search, Classifier Design and Evaluation

An UI Layout Files Analyzer for Test Data Generation
Paul POCATILU, Felician ALECU 53
Prevention actions (trainings, audits) and inspections (tests, validations, code reviews) are the crucial factors in achieving a high quality level for any software application simply because low investments in this area are leading to significant expenses in terms of corrective actions needed for defect fixing. Mobile applications testing involves the use of various tools and scenarios. An important process is represented by test data generation. This paper proposes a test data generator (TDG) system for mobile applications using several sources for test data and it focuses on the UI layout files analyzer module. The proposed architecture aims to reduce time-to-market for mobile applications. The focus is on test data generators based on the source code, user interface layout files (using markup languages like XML or XAML) and application specifications. In order to assure a common interface for test data generators, an XML or JSON-based language called Data Specification Language (DSL) is proposed.
Keywords: Mobile Applications, Software Testing, Test Data Generators, Software Quality, Time-to-Market, UI Layout

A Multi-Agent System for the Composition of Semantic Web Services Based on Complexity Functions and Learning Algorithms
Andrei-Horia MOGOS, Adina Magda FLOREA 63
Semantic web services represent an important and actual research area in computer science. A very popular topic in this area is the composition of semantic web services, which can be used for obtaining new semantic web services from existing ones. Based on a representation method for the semantic descriptions of semantic web services, that we had previously proposed, we propose a multi-agent system for the composition of semantic web services based on complexity functions and learning algorithms. Our system starts as a semi-automatic composition system, but after it gathers (using learning algorithms) sufficient information about the knowledge domain in which it is used, the system is able to perform compositions of semantic web services automatically. Based on the previously proposed representation method, this paper describes the structure and the main algorithms of the proposed system. The paper also presents an example of using the proposed system and some experimental results.
Keywords: Semantic Web Service, Composition Of Semantic Web Services, Multi-Agent Sys-tem, Complexity Functions, Learning Algorithms

The Role of Open Government Data in Urban Areas Development
Lorena BATAGAN 80
The next step for our urban areas is to become friendly using open data. The focus of this paper is to highlight the necessity and the implementation of Open Government Data (OGD). It also presents the principles of Open Government Data. The paper aims to analyze the OGD solutions and the impact of these for urban development using a SWOT analysis. In our age OGD confers an important advantage in development economy. In this case everybody tries to implement efficient OGD.
Keywords: Open Data, Open Government Data, Smart Cities, Friendly Cities, Knowledge Economy

Coordinates of a New Romanian Regional Policy - Identifying the Development Poles. A Case Study
Adriana DAVIDESCU, Vasile Alecsandru STRAT 88
The sustainable regional development is a crucial topic at the level of the EU nowadays. Therefore, the regional policies of the member states should be constructed in such a fashion, that they comply with the general European framework and maximize the potential of reaching the European goals. Following the general trend, Romania finds itself today in a complex project of rethinking its regional approach. The approach proposed in this paper will try, using statistical methods and aggregate data available in the Tempo database, to identify those counties that have the necessary characteristics in order to be taken in consideration when choosing the core county of each new region.
Keywords: Development Region, Sustainable Development, Principal Components Analysis, Development Pole

The Estimate And Selection of the Informatics Resources of Fulfilling of the Evolution of Economic Situational Information
Tudor Stefan LEAHU 100
The created situation, the factors, what contributing at it, is characterized. The necessity of return and revision of elaborative stage of constitution of the economic informatics systems (E.Ic.S.) it’s substantiated. Also, the idea of opposite order of the concept of invention, elaboration, production and application of the informatics resources, as well as, and the concept of them estimation and selection are formulated.
Keywords: Estimate, Selection, Informatics Resources, Conceptual Criteria

Parallel Processing of Economic Programs, a New Strategy in Groups of Firms
Loredana MOCEAN, Monica-Iuliana CIACA, Alexandru VANCEA 117
In recent years parallel and distributed systems have become increasingly attractive for applications with high computational demands such as simulation of complex systems from groups of companies. The main advantage of such systems is the ratio, rather than attractive, between the price and performance that can be achieved. In the present paper, authors describe some possibilities of parallel processing at the level of economic programs in groups of firms. The architecture, model and future development are shown below. This paper is an extended version of the paper presented at International Conference on Informatics in Economy (IE 2013), Bucharest, Romania
Keywords: Decidable Problems, Parallel Processing, Parallel Calculus, Groups of Firms

Publishing Guide for Authors 125

INFOREC Association 127