Search in Publications

Found 6289 publications

Endogenous brassinosteroids in microalgae exposed to salt and low temperature stress

Miroslav Strnad Péter Bálint Danuše Tarkowská Vince Ördög Wendy A. Stirk Johannes van Staden

Publication Name: European Journal of Phycology

Publication Date: 2018-07-03

Volume: 53

Issue: 3

Page Range: 273-279

Description:

Brassinosteroids are part of the hormonal network that regulates growth processes and stress responses in plants. There is evidence for a similar hormonal network in microalgae. In the present study, six microalgae (Chlorococcum ellipsoideum, Gyoerffyana humicola, Nautococcus mamillatus, Acutodesmus acuminatus, Protococcus viridis and Chlorella vulgaris) were subjected to salt and low temperature stress with the addition of 36 g l–1 NaCl and transfer from 25°C to 15°C. There was a rapid response to salt stress with the brassinosteroid content (mainly castasterone with lower amounts of brassinolide, homocastasterone and typhasterol) increasing within 30 min of the salt treatment and remaining at these elevated levels after 7 h. The decrease in temperature had little effect on the brassinosteroid content. This was the first study to show that endogenous brassinosteroids increase in response to abiotic stress in a number of microalgae species.

Open Access: Yes

DOI: 10.1080/09670262.2018.1441447

Desktop VR and the Use of Supplementary Visual Information

Borbála Berki

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 333-336

Description:

A 3D desktop virtual reality could provide an overview of program windows; thus users can see supplementary information. The aim of this study was to compare the use of this extra information in desktop VR and in a classic 2D browser. To test this, a between-subject design was realized with 53 participants (VR group: 26; browser group: 27). The MaxWhere VR environment was used as desktop VR and the Google Chrome as browser. The participants had to complete a task, while they could see their performance visually. At the final questionnaire, they had to estimate their performance and indicate their basis for this estimation. There was a significant difference in the estimation accuracy between the two groups, for those who indicated the supplementary visual information as their main source of estimation. Those who completed the task in desktop VR could estimate their performance more accurately, so they remembered better the supplementary visual information.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639925

Considering energy in the simulation of manufacturing systems

Sigrid Wenzel János Jósvai Johannes Stoldt Tobias Uhlig Andreas Schlegel Tim Peter

Publication Name: Proceedings Winter Simulation Conference

Publication Date: 2018-07-02

Volume: 2018-December

Issue: Unknown

Page Range: 3275-3286

Description:

In recent years, environmental aspects became one of the key interests in manufacturing. Accordingly, simulation studies had to include factors like energy or emissions. This paper aims to provide a comprehensive introduction to the state of the art in modeling of energy and emissions in simulation of manufacturing systems. We review existing literature to develop a landscape of common approaches and best practices. Typical goals and objectives of the reviewed simulation projects are summarized. Furthermore, we will evaluate the structure and life cycle phases of the examined manufacturing systems and look into the requirements and implementation of respective simulation studies. Finally, we will discuss open questions and future trends in this field of research.

Open Access: Yes

DOI: 10.1109/WSC.2018.8632238

Classifying the Complexity of Competency in Elementary School based on Supervised Learners

Tri Arief Sardjono I. Ketut Eddy Purnama Umi Laili Yuhana Eko Mulyanto Yuniarno Mauridhi Hery Purnomo L. T. Kóczy

Publication Name: 2018 International Conference on Computer Engineering Network and Intelligent Multimedia Cenim 2018 Proceeding

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 280-284

Description:

Complexity of competency (CoC) expresses the difficulty level of a competency. The CoC is one of the important parameters for determining the minimum passing level of competency in an assessment system. In Indonesia, the value of CoC is defined by experts based on conditions of subject, students and teachers in each school. The definition process is determined subjectively, where different experts may evaluate CoC in different ways. This is a problem of data classification that requires an automated tool that copes with the amount of data and produces uniform results. To apply an intelligent classifier is essential to solve the issue. This study aims to find the best method for classifying the complexity of competency in Elementary School. Four supervised learning techniques, namely, Naïve Bayes, Multilayer Perceptron, Sequential Minimal Optimization, and RIPPER, were implemented to analyze the dataset. Based on an experiment with 203 data, we found that the Multilayer Perceptron achieved the best performance in the sense of Mean Absolute Error, Root Mean Squared Error, and Receiver Operating Characteristic value. At the same time SMO is better than all other methods in precision, recall, and F-Measure.

Open Access: Yes

DOI: 10.1109/CENIM.2018.8710883

VR as a Medium of Communication: From Memory Palaces to Comprehensive Memory Management

Peter Galambos Adam B. Csapo Ildiko Horvath Péter Baranyi

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 389-394

Description:

This paper investigates the unique potential of VR environments to serve as a comprehensive tool for communication and memory management. The paper uncovers intricate - and in some sense holistic - links between certain kinds of VR spaces and existing frameworks for the design and analysis of conceptual mappings, and shows how VR spaces can do more than just provide appealing visual experiences, by capturing the psychology of how new memories are formed. The paper provides multiple examples from the MaxWhere VR platform to support its main arguments, and concludes with a discussion on what these arguments, if accepted as correct, will mean for AI-enhanced CogInfoCom systems in the future.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639896

Urban scaling of football followership on Twitter

Eszter Bokányi Attila Sóti Gabor Vattay

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 423-426

Description:

Social sciences have an important challenge today to take advantage of new research opportunities provided by large amounts of data generated by online social networks. Because of its marketing value, sports clubs are also motivated in creating and maintaining a stable audience in social media. In this paper, we analyze followers of prominent footballs clubs on Twitter by obtaining their home locations. We then measure how city size is connected to the number of followers using the theory of urban scaling. The results show that the scaling exponents of club followers depend on the income of a country. These findings could be used to understand the structure and potential growth areas of global football audiences.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639938

Evolution of teaching roles and tasks in VR / AR-based education

Ildiko Horvath

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 355-360

Description:

In recent years the strong potential behind VR and AR technologies in supporting education has become increasingly clear. From an educational perspective, an important benefit brought about by such technologies is that they lead to a teaching environment that is first and foremost learner centered. This encourages the application of innovative educational methods and introduces new modes of teaching into the learning experience. However, all of this makes it necessary for teachers to spend more time preparing for their classes, as well as growing acquainted with the latest technologies - in short, it is a process that requires improved digital literacy on the teachers' part.This paper presents an experiment contrasting traditional 2D interfaces and the MaxWhere 3D VR educational platform in order to shed light on how these technologies influence the effectiveness of various operations and workflows constituting teachers' tasks. In the experiment, the same workflow is compared when executed using e-mail attachments, a classical 2D e-learning platform and MaxWhere's 3D platform.The results of the experiment, evaluated in terms of a newly proposed (and clearly motivated) framework, point to the conclusion that when using MaxWhere instead of traditional 2D interfaces, teachers, lecturers and trainers are able to accomplish the same digital workflows with 37-64% less user operations, and up to 72% less machine operations. Based on these results, the paper concludes that MaxWhere as an educational platform offers users - not only students, but the lecturers, teachers and trainers too- a number of ways to accomplish tasks that would otherwise require extremely complicated digital workflows in more traditional 2D environments.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639907

Better Memory Performance for Images in MaxWhere 3D VR Space than in Website

Borbála Berki

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 281-284

Description:

This paper shows that people remember better to an image if it is inserted directly into a 3D virtual space than if it is inserted into a webpage. In our study 22 participants took part, they had to read articles displayed in the MaxWhere virtual collaboration software. The individuals had to answer some basic questions about the articles and then in the memory test they were asked whether they have seen an advertisement. Half of the participants saw the advertisements in the sidebar of the articles, for the other group it has been inserted directly into the virtual space. A better memory performance was recorded when the image was placed in the virtual space.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639956

Generation management tendencies in virtual education

Adel Vehrer Attila Pongracz

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 399-404

Description:

The authors of the present essay have been teaching at the department of Human Resoursces Counselling, MA for a decade. They both consider demographic changes and discrepancy in the various generations' digital competence as the greatest professional challenge. In this study of theirs, the authors present the principles along which they wish to prepare students for such challenges. In the future authors will designate a key role to the application of co-operative techniques as well as to the usage of 3D/VR spaces within the education process.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639957