Tatjana Welzer | University of Maribor (original) (raw)

Papers by Tatjana Welzer

2013 24th EAEEIE Annual Conference (EAEEIE 2013), 2013

ABSTRACT Mobility has become one of the most important goals in Europe and worldwide in recent ti... more ABSTRACT Mobility has become one of the most important goals in Europe and worldwide in recent time. Different projects and programs (Erasmus, Erasmus Mundus, CEEPUS, etc.) support the mobility of students, teachers and staff. For students and teachers, the main goals of mobility are learning and teaching in different cultural and lingual environments, as well as learning languages and benefiting from cross-cultural experiences. In general, neither students nor teachers are prepared for active participation in new cultural and lingual environments. International relation offices mostly take care on lingual preparation of students and sometimes also cultural education is included but rarely any preparation for teachers and staff is done. Do the teachers and staff do not need it? Or do they not want to do it?

Elektronika Ir Elektrotechnika, 2010

International cooperation either in research or teaching is very important already for a vile. In... more International cooperation either in research or teaching is very important already for a vile. In research most of international cooperation is based either on bilateral agreements, either on different international projects and cooperation. Seems that researchers have been earlier involved in international exchange of knowledge and experiences as teachers. In the paper, we will present the experiences with international cooperation in teaching gained when teachers have been involved in mobility programs like Erasmus, transcontinental cooperation or they have taken part in distance and e-learning where the cooperation with international participants (teachers and students) is also possible.

Elektronika Ir Elektrotechnika, 2015

eLearning has managed to penetrate into most classrooms nowadays and Moodle is one of wider accep... more eLearning has managed to penetrate into most classrooms nowadays and Moodle is one of wider accepted LMS. After years of its application in everyday teaching practice we were inspired to analyse the student communication and feedback habits using Moodle. In this paper, we will present the experiences and results of a questionnaire regarding Moodle and eLearning. Firstly we analyse which communications capabilities of Moodle. Additionally, we present an analysis of students’ feedback habits using Moodle regarding the grading of teachers, teaching assistants and the course in general. Finally, we also investigate student’s general opinion on eLearning and experiences with technical problem when using Moodle.

Informatica (Slovenia), 2013

Choosing complex sets of tools, usually called learning management systems (LMSs), for creating p... more Choosing complex sets of tools, usually called learning management systems (LMSs), for creating perfect blends of traditional classroom activities and the most appropriate e-learning course components has become a common practice. Our institutions have opted for open source LMS Moodle. After years of its application in everyday teaching practice we were inspired to analyse the effectiveness of this platform. In this paper, results of the surveys compiled in order to reflect the student and teacher experiences with Moodle are presented. Main focus is providing insights into opinions, expectations and possible reluctance regarding usability and privacy when using its functionalities Povzetek: V prispevku so predstavljene dolgoletne izkusnje in analize sistema Moodle.

Informatica, 2012

In a supervised learning, the relationship between the available data and the performance (what i... more In a supervised learning, the relationship between the available data and the performance (what is learnt) is not well understood. How much data to use, or when to stop the learning process, are the key questions. In the paper, we present an approach for an early assessment of the extracted knowledge (classification models) in the terms of performance (accuracy). The key questions are answered by detecting the point of convergence, i.e., where the classification model's performance does not improve any more even when adding more data items to the learning set. For the learning process termination criteria we developed a set of equations for detection of the convergence that follow the basic principles of the learning curve. The developed solution was evaluated on real datasets. The results of the experiment prove that the solution is well-designed: the learning process stopping criteria are not subjected to local variance and the convergence is detected where it actually has occurred.

2011 Proceedings of the 22nd Eaeeie Annual Conference, Jun 1, 2011

The most popular social networking site (SNS) Facebook gets new users every day and because of th... more The most popular social networking site (SNS) Facebook gets new users every day and because of this incredible spread of the network, we explore an option of including different features of Facebook into courses. There are many ways we can connect with students through Facebook and by that we use time outside course hours to communicate with them. We also expose privacy issues that appear while using this SNS. Facebook can be used as a supplemental tool in courses, because it is an environment students feel familiar with.

Medical Informatics Europe, 2009

The individual's right to determ ine if, when and how data about them will be collected, stor... more The individual's right to determ ine if, when and how data about them will be collected, stored, used and shared with others is called the right to privacy. The problem of data collection and sharing arises daily among health services. Among medical staff, there are numerous message flows, including the medical records of patien ts and other patient's personal data.

Today's databases store information with sensitivity levels that range from public to highly ... more Today's databases store information with sensitivity levels that range from public to highly sensitive, hence ensuring confidentiality can be highly important, but also requires costly control. This paper focuses on the inference problem on different database structures. It presents possible treats on privacy with relation to the inference, and control methods for mitigating these treats. The paper shows that using only access control, without any inference control is inadequate, since these models are unable to protect against indirect data access. Furthermore, it covers new inference problems which rise from the dimensions of new technologies like XML, semantics, etc.

Facebook has launched a facial recognition feature and incorporated it by default for all users. ... more Facebook has launched a facial recognition feature and incorporated it by default for all users. This feature is also known as Photo Tag Suggest. It enables the automatic scanning of faces on newly uploaded photos and matches these faces with new photos with Facebook users on existing photos. To the best of our knowledge, Facebook has never published any information about the technologies that this feature uses and, therefore, we have investigated the possible technologies used for a feature seen as this. Facebook’s facial recognition feature associates tags with the accounts of other Facebook users. This is most likely done by comparing different faces within their database and by also taking their social contexts into account. This paper also reviews privacy concerns relating to Facebook’s facial recognition features based on a research conducted amongst students using Facebook and also presents guidelines and suggestions for increasing privacy awareness.

Present computer science and informatics have to produce IT solutions that are user friendly and ... more Present computer science and informatics have to produce IT solutions that are user friendly and in general global appropriate while we are nowadays much more connected to each other as in the past. We are living in multicultural and multilingual societies where the intercultural dialog and cultural awareness are more and more important. With increased mobility, small societies are more multicultural and international, while in the past mostly only big societies with a lot of immigrants have been described as multicultural and multilingual. Internationalization and mobility pushed us to take care about the global conceptual modeling. This entire means that our partners in the modeling process (users and customers) are/could coming from different organizational, cultural and language environments. Consecutive, this can influence theirs way of understanding conceptual modeling, as well as methods, expectations, results and other activities in the process. Even more, this can influence...

Lecture Notes in Computer Science

Recent progress in hash functions analysis has led to collisions on reduced versions of SHA-256. ... more Recent progress in hash functions analysis has led to collisions on reduced versions of SHA-256. As in other hash functions, differential collision search methods of SHA-256 can be described by means of conditions on and between state and message bits. We describe a tool for efficient automatic searching of message pairs conforming to useful sets of conditions, i. e. stemming from (interleaved) local collisions. We not only considerably improve upon previous work [7], but also show the extendability of our approach to larger sets of conditions. Furthermore, we present the performance results of an actual implementation and pose an open problem in this context.

IFIP Advances in Information and Communication Technology, 2010

In recent years, mobility has become one of the most important goals inside the European Union (E... more In recent years, mobility has become one of the most important goals inside the European Union (EU). Different projects and programs support the mobility of students, teachers and other employed persons. From program to program and project to project, goals are different. Through employment, companies have the need for different experts or the need to work with international teams. They can also offer jobs for placements and for young experts for their first employment (like the Leonardo da Vinci program), while for students and teachers, the main goals of mobility are learning and teaching in different environments (like the Erasmus program) as well as learning languages and benefiting from cross-cultural experiences. Both students and teachers come from different cultural environments and the host organisation has to take care of intercultural awareness in all levels of activities, from administration up to teaching and passing exams.

2011 IEEE Global Engineering Education Conference (EDUCON), 2011

Abstract The Virtual Centre for Enterprise (VCE) is a virtual education centre for the developmen... more Abstract The Virtual Centre for Enterprise (VCE) is a virtual education centre for the development of entrepreneurial skills and competencies. The centre provides intensive vocational courses (e-learning modules), for (primarily) employed learners. The VCE ...

Computers in Human Behavior, 2015

In recent years, social networking sites have spread rapidly, raising new issues in terms of priv... more In recent years, social networking sites have spread rapidly, raising new issues in terms of privacy and self-disclosure online. For a better understanding of how privacy issues determine self-disclosure, a model which includes privacy awareness, privacy social norms, privacy policy, privacy control, privacy value, privacy concerns and self-disclosure was built. A total of 661 respondents participated in an online survey and a structural equation modeling was used to evaluate the model. The findings indicated a significant relationship between privacy value/privacy concerns and self-disclosure, privacy awareness and privacy concerns/self-disclosure, privacy social norms and privacy value/self-disclosure, privacy policy and privacy value/privacy concerns/self-disclosure, privacy control and privacy value/privacy concerns. The model from the study should contribute new knowledge concerning privacy issues and their shaping of self-disclosure on social networking sites. It could also help networking sites service providers understand how to encourage users to disclose more information.

Proceedings of the 2011 international workshop on DETecting and Exploiting Cultural diversiTy on the social web - DETECT '11, 2011

The increasing availability of the Web has been breaking down communication limitations in societ... more The increasing availability of the Web has been breaking down communication limitations in society and enabling the easy transcending of physical borders. Additionally, the emergence of social media like forums, blogs, wikis, podcasts, etc., is bringing technology closer to people who are not experts. By using global communication systems, people are changing continents, countries, regions, cultures and languages very easily,

2014 IEEE Global Engineering Education Conference (EDUCON), 2014

ABSTRACT Erasmus is probably the most well-known European Commission (DG for Education and Cultur... more ABSTRACT Erasmus is probably the most well-known European Commission (DG for Education and Culture) program to support the mobility of students, teachers and staff. There are also many others that support mobility, either worldwide or locally. The main goals of mobility for students and teachers independent of the program are learning and teaching in different cultural and lingual environments, as well as learning languages and benefiting from cross-cultural experiences and cultural differences. Quite often, neither students, teachers nor staff are as prepared for the active participation in different cultural and lingual environments as they are for domestic ones. Institutions primarily take care of the lingual readiness of students and sometimes cultural education is also included but rarely is any preparation done for teachers and staff. If the preparation is done for teachers and staff on mobility it is usually never done for those who are staying at home and working at a home institution with mobile students. The situation is also similar for non-mobile home students. Real life shows that preparing for cultural differences is needed for all of them.

2006 International Conference on Intelligent Engineering Systems

Use of data in various areas and their electronic availability has put importance of data to high... more Use of data in various areas and their electronic availability has put importance of data to higher level. In many cases data come from different sources, which are distributed across enterprise and are at different quality levels. Special attention need to be paid to data upon which critical decisions are met especially in/for intelligent systems. In the present paper we

2009 International Conference on Availability, Reliability and Security, 2009

Recently, Yoon and Yoo proposed a new authentication protocol based on a one-way hash function an... more Recently, Yoon and Yoo proposed a new authentication protocol based on a one-way hash function and Diffie-Hellman key exchange, which is based on the protocol by Wu-Chieu and Lee-Lin-Chang. They claim that their protocol is secure, but we show it is susceptible to password guessing if an adversary gains possession of the smart card. Additionally, we propose an improved protocol

Nowadays every visit to the doctor requests the cooperation between the nurse and IT technology. ... more Nowadays every visit to the doctor requests the cooperation between the nurse and IT technology. But are nurses really sufficiently equipped with knowledge about their working environment, as far as IT technology is concerned? Without doubt, more knowledge about the possibilities, benefits, possible mistakes and their consequences related to IT technology is needed for being used adequately in the health services. In the paper we will present the postgraduate program which aims at moving those possible obstacles and targets also at decreasing the lack of knowledge in this field of knowledge. We will present the study program in general and, additionally, will focus on specific IT areas like databases. The paper will also discuss the experiences and assessments which are acquired during the last years by the students in the database lecture. The mentioned lecture constitutes a part of the IT modules in the postgraduate health care and nursing program.