Marc Jansen

Marc Jansen
Hochschule Ruhr West · Computer Science

Dr.

About

87
Publications
45,805
Reads
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552
Citations
Additional affiliations
October 2012 - present
Linnaeus University
Position
  • Professor

Publications

Publications (87)
Chapter
Visual programming has become a term that stands for intuitive software development. It dispenses largely with textual notation and instead uses graphical program modules. The use of visual techniques is connected with the hope, among other things, to be able to create and understand programs more easily and better than before, which would open up...
Chapter
Blockchain comes up to solve centralization problems and to be an alternative solution to traditional finance. This technology seems to be very promising and has proven a big efficiency in ensuring trust among the network. It innovates and proposes new forms of governance and capital allocation, it promises decentralized financial services of credi...
Chapter
In this paper we present an application that, by using the blockchain, tries to inform the user about possible fraud attempts on the internet. The application presented is intended to prevent the user from landing on websites that have recently been the target of various attacks. Installed as a browser plugin it should alert the user upon visiting...
Chapter
Programming is not a simple task. Besides, the learning of syntax, the obstacles often seem insurmountable for the beginner. Syntax errors frustrate and distract attention from the actual algorithms and logic that need to be understood. With the help of visual programming, syntax errors can be avoided as much as possible by using predefined graphic...
Chapter
Decentralized apps offer users significant advantages. One main advantage is that the content belongs to the users. Although decentralized apps have been developed, decentralized multiplayer games have still been a challenge. This research work is therefore based on the question: Is it possible to create a turn-based real-time online multiplayer ga...
Article
Web-based learning systems with adaptive capabilities to personalize content are becoming nowadays a trend in order to offer interactive learning materials to cope with a wide diversity of students attending online education. Learners’ interaction and study practice (quizzing, reading, exams) can be analyzed in order to get some insights into the s...
Chapter
In this paper, we propose a method to localise and track persons in heavy industry environments with multiple cameras. Using the OpenPose network, we localise the persons feet points on each cameras image individually and perform according 3D transformations. With prior knowledge about the camera settings in the environment, we use a rule-based sys...
Chapter
The fourth industrial revolution seeks to enhance and optimize industrial processes through digital systems. However, such systems need to meet special criteria for usability and task support, ensuring users’ acceptance and safety. This paper presents an approach to support employees in heavy industries with augmented reality based indoor navigatio...
Chapter
Full-text available
Blockchain based systems become more and more prominent. While starting by developing (crypto)currency payment schemes, a lot of the latest development goes in the direction of executing source code directly in the peer-to-peer network blockchains are usually built on. These so called smart contracts have become popular in order to reduce the amoun...
Conference Paper
Full-text available
In order to fulfill the customer's requests for more product variety and quality, the processes in heavy industry companies are becoming shorter and more complex. These changes will also affect the demands on employees. At last, they make decisions within the diverse hierarchical levels that influence the production planning and the production proc...
Technical Report
Full-text available
Dieser interne Bericht beschreibt die Zielsetzung, Durchführung und Auswertung des Projektes Damokles 4.0. Das Projekt zielt darauf ab, neue, digitale Technologien in die Schwerindustrie einzuführen um Produktionsprozesse zu modernisieren. Unter Einsatz neuer Technologien, insbesondere mobiler Geräte, soll ein cyberphyiskalisches System (CPS) eine...
Conference Paper
Full-text available
In this paper, we propose a method to localise and track persons in heavy industry environments with multiple cameras. Using the OpenPose network, we localise the persons feet points on each cameras image individually and perform according 3D transformations. With prior knowledge about the camera settings in the environment, we use a rule-based sys...
Conference Paper
Full-text available
Cognitive prerequisites should be taken into consideration when providing personalized and adaptive web-based learning systems and it should be possible to extract them based on students´studystudents´study behavior. Working memory capacity (WMC) is one of the cognitive characteristics that affect students' performance and their academic achievemen...
Conference Paper
Full-text available
Blockchain based systems become more and more prominent. While starting by developing (crypto)currency payment schemes, a lot of the latest development goes in the direction of executing source code directly in the peer-to-peer network blockchains are usually built on. These so called smart contracts have become popular in order to reduce the amoun...
Chapter
In recent years, educational practitioners and learning technologists have been designing, developing and deploying a wide range of innovative environments to enhance meaningful, seamless and exciting learning experiences. In these learning environments, students may interact as individuals or in groups across several learning spaces, while utilizi...
Conference Paper
Full-text available
In this paper we evaluate different machine learning models for human body detection in heavy industry environments. Contributing a framework to asses the reliability of a detection system in industrial environments, we compare techniques of feature extraction for support vector machines to artificial neural networks. To accommodate for common envi...
Conference Paper
Full-text available
Industry 4.0 is known as the fourth industrial revolution which refers to the integration of technologies that make the factories interoperable by seamlessly connecting machines, employees and sensors for communication. In Industry 4.0, one of the key features is the use of new technologies to recognize the current context. Thus, the employees are...
Conference Paper
The term Computational Thinking is closely related to efforts connected to teach a systematic and well-structured way of problem solving that includes a set of tools and techniques used in Computer Science. While substantial research in this field has shown promising outcomes concerning distinct intervention programs and teaching initiatives, the t...
Chapter
„Cloud Computing“ hat die gesamte IT Landschaft in den letzten Jahren durch neue Architekturen und Servicemodelle nachhaltig verändert. Hieraus ergeben sich auch neue Möglichkeiten der technischen Unterstützung und Orchestrierung von Lernszenarien, insbesondere von mobil gestützten Lernanwendungen. In diesem Kapitel werden aus dieser Perspektive di...
Chapter
Full-text available
One of the major problems in social media research on networks is the lack of empirical datasets. To avoid this problem, different graph generation models have been proposed to represent real social graphs to an acceptable extent. This enables researchers to try and evaluate new methods on a large number of social media networks. The work described...
Conference Paper
Full-text available
We evaluate the technological feasibility of a system that allows to contact a mobile device over the internet and to determine its position. We apply this system to a scenario where voluntary human resources are semi-automatically integrated into professional rescue processes. The latency of two different location APIs on the Android OS when using...
Conference Paper
Full-text available
This paper describes and evaluates three methods for anonymizing location data in the context of an example of practical relevance. These anonymization methods are designed for a smartphone-based system to integrate voluntary helpers into professional rescue processes, especially in case of time-critical medical emergencies, but can also be used fo...
Article
Full-text available
Background: Influential actors detection in social media such as Twitter or Facebook can play a major role in gathering opinions on particular topics, improving the marketing efficiency, predicting the trends, etc. Proposed methods: This work aims to extend our formally defined T measure to present a new measure aiming to recognize the actor’s inf...
Article
Full-text available
Background Detection of influential actors in social media such as Twitter or Facebook plays an important role for improving the quality and efficiency of work and services in many fields such as education and marketing. Methods The work described here aims to introduce a new approach that characterizes the influence of actors by the strength of a...
Conference Paper
In recent years, hardware and interaction devices for the production and consumption of virtual reality materials, e.g., 360-degree cameras, VR headsets and portable sensors, have become affordable making them available to many people. Accordingly, schools and universities are showing increased interest in the implementation and use of virtual real...
Chapter
Full-text available
Detection of influential actors in social media such as Twitter or Facebook can play a major role in improving the marketing efficiency, gathering opinions on particular topics, predicting the trends, etc. The current study aspires to extend our formal defined T measure to present a new measure aiming to recognize the actors influence by the streng...
Chapter
Open Educational Resources (OER) intend to support access to education for everyone. However, this potential is not fully exploited due to various barriers in the production, distribution and the use of OER. In this paper, we present requirements and recommendations for systems for global OER authoring. These requirements as well as the system itse...
Article
Full-text available
This chapter describes our research efforts related to the design of mobile learning (m-learning) applications in cloud-computing (CC) environments. Many cloud-based services can be used/integrated in m-learning scenarios, hence, there is a rich source of applications that could easily be applied to design and deploy those within the context of clo...
Article
Full-text available
The continuous evolution of learning technologies combined with the changes within ubiquitous learning environments in which they operate result in dynamic and complex requirements that are challenging to meet. The fact that these systems evolve over time makes it difficult to adapt to the constant changing requirements. Existing approaches in the...
Article
Full-text available
Nowadays, teachers and students utilize different ICT devices for conducting innovative and educational activities from anywhere at any time. The enactment of these activities relies on robust communication and computational infrastructures used for supporting technological devices enabling better accessibility to educational resources and pedagogi...
Conference Paper
Full-text available
The wide availability of mobile devices like smartphones and tablets among students as well as the included positioning technologies, high definition cameras and other sensors, together with continuous Internet access bring many new opportunities for developing mobile applications supporting learning activities. However, there is an immense fragmen...
Conference Paper
Detection of influential actors in social media plays an important role for increasing the quality and efficiency of work and services in many fields such as education, marketing, etc. This work aims to introduce a new approach for the characterization of influential actors in online social media, such as Twitter. We present on a model of influence...
Conference Paper
Full-text available
This paper discusses the efforts carried out related to the design and development of a web-based framework that allows designing, deploying and executing mobile data collecting applications. Furthermore, it also allows analyzing and presenting the data that is generated during the mentioned process. The fact that the framework is completely web-ba...
Conference Paper
Social networking sites (SNSs) are an integral part of our daily life. With the evermore increasing appearance of SNSs, their users spend considerable time producing of different forms everyday (e.g. text, videos, photos, links, etc.) or browsing the varieties of contents in different SNSs. In this paper, we propose an architectural perspective on...
Conference Paper
Full-text available
This paper presents a web-based framework that allows the creation and deployment of mobile learning activities. We present an authoring tool that allows not-technically skilled persons to design mobile learning tasks and deploy them as a web-based mobile application. Since the presented approach is based exclusively on web-technologies, the deploy...
Conference Paper
Full-text available
This paper describes the design and development stages of a web-based framework, aiming to support the creation of mobile applications within the context of mobile learning. The suggested approach offers the opportunity to deploy and execute these applications on mobile devices. This web-based solution additionally offers the possibility to visuali...
Conference Paper
Full-text available
In den letzten Jahren nahm die Nutzung mobiler Geräte stark zu, was auch zu einer Verbreitung mobiler Geräte in mobilen Lernszenarien geführt hat. Aufgrund der Heterogenität der am Markt befindlichen mobilen Geräte wird zur Softwareentwicklung häufig ein plattformunabhängiger Ansatz gewählt. Hierzu gibt es im Wesentlichen zwei unterschiedliche Ansä...
Conference Paper
Full-text available
In societies where the demographic change leads to a more and more unbalanced state between the elderly and all other different age groups, there, health management becomes one of the most significant problems, e.g., in order to allow what is often called successful aging. Ubiquitous use of smart mobile devices enables gathering of personalized dat...
Conference Paper
Full-text available
Mobile devices are nowadays used almost ubiquitously by a large number of users. 2013 was the first year in which the number of sold mobile devices (tablet computers and mobile phones) outperformed the number of PCs’ sold. And this trend seems to be continuing in the coming years. Additionally, the scenarios in which these kinds of devices are used...
Article
Recommender systems have become an important application domain related to the development of personalized mobile services. Thus, various recommender mechanisms have been developed for filtering and delivering relevant information to mobile users. This paper presents a rich context model to provide the relevant content of news to the current contex...
Article
In recent years, teachers have started to conduct pedagogical activities to promote different kinds of learning interactions supported by rich media. The deployment of such activities is rapidly increasing, as teachers and students own technological means that allow supporting them along such interactions. These activities can be carried out in tra...
Article
Substantial research in the field of mobile learning has explored aspects related to contextualized learning scenarios. Nevertheless, the current context of a mobile learner has been often limited to his/her current position, neglecting the possibilities offered by modern mobile devices of providing a much richer representation of the current learn...
Article
In recent years, many efforts have been undertaken in order to design and deploy learning activities that make use of modern mobile devices, like smartphones and tablet PC’s. Hence, new possibilities for supporting these so-called mobile learning scenarios have risen. One of the major benefits of these kinds of learning scenarios is the possibility...
Conference Paper
Full-text available
Nowadays, there is a growing variety of mobile devices and online video content that could be used to support a variety of pedagogical strategies used for different cross-context learning scenarios. In order to take advantage of these developments, this paper presents an approach that allows to integrate learning material represented as videos in m...
Conference Paper
One of the most stressing challenges in our culture is the demographic change. On the one hand, people become older and older, at the same time less young people are available in order to support the elderly. Currently, this fact already provides a number of social impacts that need to be solved in the near future. This paper concentrates on the in...
Conference Paper
The use of Web Services in modern software development is widely accepted and provides (integrated in an according architecture) a fast, flexible and scalable way for the implementation of modern software products. On the other hand, the development of mobile applications, so called apps, becomes more and more important. While using Web Services al...
Conference Paper
In recent years, the development of smart and mobile devices gained more and more attention. Here, embedded systems provide a fast and convenient way for the implementation of new applications that allow for flexible and innovative interaction with our environment. Additionally, the development in the area of embedded systems does not only provide...
Conference Paper
Web Services are today a well-accepted technology. Especially in the area of Cloud Computing, Web Services usually provide one of the building blocks of the used technology. Another driving technology nowadays are mobile devices. Nevertheless, there is not much research conducted yet in bringing these two important technologies together, e.g. with...
Article
The term Cloud Computing" does not primarily specify new types of core technologies but rather addresses features to do with integration, inter-operability and accessibility. Although not new, virtualization and automation are core features that characterize Cloud Computing. In this paper, we intend to explore the possibility of integrating cloud s...
Article
Full-text available
Cloud Services like Google Drive, Brainstormer, Doodle are meanwhile frequently used as tools for learning in various contexts. They provide storage facilities, production tools and particularly also coordination support. The management of these heterogeneous tools is a challenge for the individual users as well as for the usage in groups. This pap...
Article
Mobile devices, in the form of smartphones, are endowed with rich capabilities in terms of multimedia, sensors and connectivity. The wide adoption of these devices allows using them across different settings and situations. One area in which mobile devices become more and more prominent is within the field of mobile learning. Here, mobile devices p...
Conference Paper
Full-text available
Applications and research efforts in Mobile Learning constitute a growing field in the area of Technology Enhanced Learning. However, despite a permanent increase of mobile internet accessibility and availability of mobile devices over the past years, a mobile learning environment that is easy to use, widely accepted by teachers and learners, uses...
Conference Paper
In recent years, the number of users in social networking sites regularly increased. Especially younger people spend a tremendous time on social networking sites like Facebook, YouTube, Flickr, Google+ and many more. Since obviously this is the place on the World-Wide-Web where our students spent their spare time, we integrated social networking si...
Conference Paper
This paper presents an approach towards a mobile learning environment, which is flexible in terms of supported scenarios, supported devices and input channels. The approach makes use of existing and commonly used channels like SMS, Twitter or Facebook to increase acceptance and ease-of-use of mobile devices in learning scenarios. Envisaged applicat...
Conference Paper
In recent years the diversity and the ownership of mobile devices steadily increased while the prices for this kind of devices decreased to a level that allows many students to own reasonably powerful devices. As mobile devices are also being used in learning scenarios, the challenge of today is the integration of multiple heterogeneous devices int...
Article
Since the personal ownership of mobile devices has increased steadily over the last decade, many students own personal mobile devices that can reasonably be integrated into mobile learning scenarios. Besides all the benefits this option brings, there are also drawbacks, such as the heterogeneity of the set of mobile devices that need to be managed...
Conference Paper
The term "Cloud Computing" does not primarily specify new types of core technologies but rather addresses features to do with integration, inter-operability and accessibility. Although not new, virtualization and automation are core features that characterize Cloud Computing. In this paper, we intend to explore the possibility of integrating cloud...
Book
This book constitutes the proceedings of the 18th Collaboration Researchers' International Working Group Conference on Collaboration and Technology, held in Raesfeld, Germany, in September 2012. The 9 revised papers presented together with 12 short papers were carefully reviewed and selected from numerous submissions. They are grouped into five the...
Article
This paper describes a system which allows platform independent access to quizzes of the popular learning platform Moodle. The main focus is on the software architecture which is implemented on the base of platform independent technology like Web Services, HTML5 and JavaScript. Another aspect is the user interface which was developed with the goal...
Article
In recent years, the number of mobile devices that are available for learning scenarios has increased a lot. Different learning settings are usually supported by mobile devices. On the one hand we find mobile devices in informal learning settings, and on the other hand in formal learning settings like a usual lecture. This paper motivates the quest...
Article
Due to the increasing number and power of mobile devices combined with decreasing prices in recent years, more and more students own mobile devices that are reasonably powerful to support mobile learning scenarios. Therefore schools nowadays usually would not need to buy these kinds of devices for their students, if a methodology could be provided...
Conference Paper
Middleware for supporting the programming of distributed systems has been proposed since the beginnings of Internet. Various approaches have been implemented to support different ways of communication, architecture, and data sharing. A schema called MatchMaker intended for developing applications requiring a replicated architecture, dynamic and par...
Conference Paper
Middleware for supporting the programming of distributed systems has been developed since almost the beginnings of the existence of the Internet. Different approaches have been implemented in order to support different ways of communication, architecture, and data sharing. In this paper we present a schema called MatchMaker developed for developing...
Conference Paper
In the ''smart planets" environment described in this paper, smart objects are used to set up astronomical configurations in a hands-on fashion. The physical configuration is then mapped onto a dynamic simulation environment. Details and the logic of the underlying mapping are explained and analysed.