Journal of Information and Organizational Sciences (JIOS)
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Computer Games as Virtual Environments for Safety-Critical Software Validation
No full textComputer games became an inseparable part of everyday life in modern society and the time people spend playing them every day is increasing. This trend caused a noticeable research activity focused on utilizing the time spent playing in a meaningful way, for example to help solving scientific problems or tasks related to computer systems development. In this paper we present one contribution to this activity, a software system consisting of a modified version of the Open Rails train simulator and an application called TS2JavaConn, which allows to use separately developed software controllers with the simulator. The system is intended for validation of controllers developed by formal methods. The paper describes the overall architecture of the system and operation of its components. It also compares the system with other approaches to purposeful utilization of computer games, specifies suitable formal methods and illustrates its intended use on an example
From the Editor
No full textDear readers and authors,We are constantly striving to increase both quality and quantity of papers published in our Journal. Also, we are constantly endeavor to include the Journal in new scientific databases. In the meantime Journal of Information and Organizational Sciences is included in the Web of Science Core Collection - Emerging Sources Citation Index (ESCI) and we are hoping that we will become the full member of the Web of Science database in short time.In this issue of the Journal we are presenting nine high quality papers from authors from Europe, Africa and Asia, consisting of four survey papers, one preliminary communication and four original scientific papers.We hope that this issue will satisfy all your requests, and that you will find included papers interesting and scientifically challenging
The Classification of Types of Business-to-Business Electronic Commerce: A Framework Construction
No full textBased on the degree of information sharing between buyers and suppliers as well as thelevel of supplier power, we suggested a framework that can be useful for classifyingtypes of business to business (B2B) electronic commerce (EC) in the manufacturingfirms. According to this framework, four kinds of B2B EC were theoretically proposed,classified, and empirically confirmed. These four are: an electronic marketplace,electronic procurement, electronic partnerships, and electronic distribution. Many priorstudies have investigated and proposed some kinds of B2B EC. However, these studiesfocused mostly on one or two types of B2B EC, and did not develop or suggest aframework for the classification of forms of B2B EC. The framework constructed inthis research can be utilized variously. Specifically, when a firm wants to initiate B2BEC with its suppliers, this framework can help a firm to decide and select an appropriatekind of B2B EC. This framework can also be applied to evaluate whether the properform of B2B EC has been adopted or not
Learning Analytics for Peer-assessment: (Dis)advantages, Reliability and Implementation
No full textLearning analytics deals with the data that occurs from students' interaction with ICT: collecting data, analyzing and reporting that can influence learning and teaching. Analysis of validity and reliability of assessment lags behind other applications of learning analytics. We present here mathematical modeling of learning analytics for assessment, especially for peer-assessment. In addition, we analyze and categorize students' recognition of advantages and disadvantages of peer-assessment. Finally implementations of reliability check of peer-assessment in Moodle Workshop module are explained
Merkle-Damgård Construction Method and Alternatives: A Review
No full textCryptographic hash function is an important cryptographic tool in the field of information security. Design of most widely used hash functions such as MD5 and SHA-1 is based on the iterations of compression function by Merkle-Damgård construction method with constant initialization vector. Merkle-Damgård construction showed that the security of hash function depends on the security of the compression function. Several attacks on Merkle-Damgård construction based hash functions motivated researchers to propose different cryptographic constructions to enhance the security of hash functions against the differential and generic attacks. Cryptographic community had been looking for replacements for these weak hash functions and they have proposed new hash functions based on different variants of Merkle-Damgård construction. As a result of an open competition NIST announced Keccak as a SHA-3 standard. This paper provides a review of cryptographic hash function, its security requirements and different design methods of compression function
Using AHP Method for Making a Decision on How the Management of Sewage Sludge in the Northern Croatia
No full textBy 2018, in Croatia, the agglomerations for collecting the sewage and water treatment systems are going to be constructed. All devices will be based on the mechanical-biological method of purification. However, the work of water treatment system produces a problem of sludge management. The paper presents the challenges of wastewater sludge handling and makes a decision on further sludge management. The hierarchical model of the decision making problem by defining the goal, criteria and alternative solutions is developed. On each level of the hierarchical model the elements of the model are compared with each other in pairs, and the preferences are expressed by using the Saaty’s scale. Moreover, the APH model compares the alternative pairs (thermal processing, deposition on agricultural land, disposal to waste repositories and composting) among each others. The intensities and weight preferences of one alternative over another are selected within the required criteria (economic, environmental, organisational and sociological)
The Elaboration of Strategic Decisions in the Socio-Economic Systems
No full textThe article deals with socio-economic strategic management, which implemented on the basis of Balanced Scorecard, multidimensional modeling and its set-theoretic representation. The main idea of the article is using of modern information technology to assist in decision-making. Much attention is given to formalization of SCIPEO-modeling and integration of its sub-model. The process of developing of management decisions is considered. The integration of these tools will improve the management of the system in a situation of total or partial indeterminac
Knowledge Management Systems in the Polish Private, State and Foreign Owned Companies
No full textThe importance of knowledge management for enterprises increased significantly in the recent years. In this paper one element of knowledge management will be considered, namely knowledge management systems (KMS). The main purpose of this paper is to compare the level of use of KMS between Polish private and state owned companies as well as foreign owned enterprises of different size. To measure intensity of use of particular KMS technologies research questionnaire has been created. The sample was selected from Kompass Poland database and more than 1200 questionnaires have been collected. Statistical analysis of differences between target sections was conducted by Mann-Whitney U test. Overall analysis of results showed that foreign owned companies feature greater intensity of use of KMS functions than Polish state owned and private owned enterprises. Detailed results indicated that small and medium Polish private companies utilize discussed systems to a far lesser extent. Nevertheless, large private companies feature higher intensity of use of 4 out of 5 examined KMS than large state owned enterprises