Jan Renz

Jan Renz
  • Dr. rer. nat.
  • Research Associate at Hasso Plattner Institute

About

62
Publications
16,930
Reads
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768
Citations
Current institution
Hasso Plattner Institute
Current position
  • Research Associate

Publications

Publications (62)
Preprint
We investigate the importance of user experience (UX) aspects for two different large-scale learning environments, openHPI and the HPI Schul-Cloud, and compare them to results from a survey conducted by Winter et al. (2017). Results show similarities regarding the prioritization of pragmatic quality aspects, but noticeable differences for hedonic q...
Technical Report
Full-text available
The Digital Credentials Consortium was founded by leading universities with expertise in the design of verifiable digital credentials. Together, we are designing an infrastructure for digital credentials of academic achievement.
Conference Paper
Learners in Massive Open Online Courses (MOOCs) are reiterating over the provided course material - especially self-tests - to consolidate their knowledge. This is a manual and often cumbersome process as MOOC platforms do not provide personalized revision opportunities. This paper introduces the design and concept of a flashcard-like recap tool ba...
Chapter
openSAP startete 2013 als Pilotprojekt. Fünf Jahre später stehen mehrere hundert Kurse online kostenlos zur Verfügung, und fast 300 Kurse beweisen den Erfolg der Plattform. Innerhalb der Lernwelt der SAP hat openSAP seinen festen Platz gefunden. Dieses Kapitel beschreibt die Anfänge und wie aus den akademischen MOOCs von openHPI das Konzept für die...
Thesis
In unserer digitalisierten Welt verlagert sich das Lernen in die Cloud. Vom Unterricht in der Schule und der Tafel zum Tablet, hin zu einem lebenslangen Lernen in der Arbeitswelt und sogar darüber hinaus. Wie erfolgreich und attraktiv dieses zeitgemäße Lernen erfolgt, hängt nicht unwesentlich von den technologischen Möglichkeiten ab, die digitale L...
Article
openSAP is one of the first and leading companies offering free online courses. After more than five years of offering openSAP.com this paper at hand takes a look at insight gained during this time and aims to identify success factors for enterprise MOOC providers.
Conference Paper
This Research Full Paper presents insights from digital worksheets with embedded interactive programming exercises tailored for high-school students new to programming. Computer science teachers often incorporate existing videos, quizzes, and practical programming exercises from Massive Open Online Courses (MOOCs). However, teachers' options to ada...
Conference Paper
We investigate how the technology acceptance and learning experience of the digital education platform HPI Schul-Cloud (HPI School Cloud) for German secondary school teachers can be improved by proposing a user-centered research and development framework. We highlight the importance of developing digital learning technologies in a user-centered way...
Conference Paper
As Massive Open Online Courses (MOOCs) generate a huge amount of learning activity data through its thousands of users, great potential is provided to use this data to understand and optimize the learning experience and outcome, which is the goal of Learning Analytics. But first, the data needs to be collected, processed, analyzed and reported in o...
Conference Paper
Mobile devices are omnipresent in our daily lives. They are utilized for a variety of tasks and used multiple times for short periods throughout the day. MOOC providers optimized their platforms for these devices in order to support ubiquitous learning. While a combination of desktop and mobile learning yields improved course performances, standalo...
Conference Paper
Today, Web Analytics (WA) is commonly used to obtain key information about users and their behavior on websites. Besides, with the rise of online learning, Learning Analytics (LA) emerged as a separate research field for collecting and analyzing learners’ interactions on online learning platforms. Although the foundation of both methods is similar,...
Book
Full-text available
Die digitale Transformation durchdringt alle gesellschaftlichen Ebenen und Felder, nicht zuletzt auch das Bildungssystem. Dieses ist auf die Veränderungen kaum vorbereitet und begegnet ihnen vor allem auf Basis des Eigenengagements seiner Lehrer*innen. Strukturelle Reaktionen auf den Mangel an qualitativ hochwertigen Fortbildungen, auf schlecht aus...
Conference Paper
Gameful learning describes the use of games for learning purposes. While gamification is a common term for most people, game-based learning is not – however, the definitions of both are often mixed up. For a better understanding, differences and similarities between game-based learning and gamification as well as findings on how to use both in scal...
Preprint
This paper presents a novel approach to understand specific student behavior in MOOCs. Instructors currently perceive participants only as one homogeneous group. In order to improve learning outcomes, they encourage students to get active in the discussion forum and remind them of approaching deadlines. While these actions are most likely helpful,...
Conference Paper
Full-text available
Learning Analytics becomes more expressive by combining results of various educational resources. However, the usage of a single resource might generate sensitive personal data. To facilitate the application of a broad range of learning tools with regard to data protection, school clouds are able to pseudonymise user identities. This work examines...
Conference Paper
Full-text available
This paper discusses the usage of xAPI in an pseudonymized scenario to collect learning analytics data of content that is provided by external publishers to german schools. Therefore the technical approach is presented, before first insights from evaluating this approach in a prototype with two large german content providers are discussed.
Conference Paper
Full-text available
The platform OpenWHO was developed in 2017 in a cooperation between the World Health Organization (WHO) and the Hasso Plattner Institute (HPI). The Department of Infectious Hazard Management, under the WHO Health Emergencies Programme, worked together with the HPI to create a new interactive, web-based, knowledge-transfer platform offering online c...
Conference Paper
The pervasive presence of mobile devices and growing trends like ubiquitous learning make new demands on Massive Open Online Courses (MOOCs). Users learn increasingly on the go and with multiple devices, instead of being tied to a fixed workstation. However, there is a lack of research how the usage of mobile devices influences the learning behavio...
Conference Paper
Full-text available
Massive Open Online Courses(MOOCs) make use of educational technologies to deliver learning materials, supposedly open for everyone, usually with a capacity to serve a substantial number of learners regardless of their geographical locations. A recent advancement in mobile technologies and wireless communications in Africa has produced a conducive...
Poster
Full-text available
Massive Open Online Courses (MOOC) make use of educational technologies to deliver online education supposedly open for everyone, usually with a capacity to serve a substantial number of learners regardless of their geographical locations. A recent advancement in mobile technologies in Africa has produced a conducive digital environment enough to s...
Conference Paper
Many providers of Massive Open Online Course (MOOC) platforms released mobile applications in the recent years to enable learning offline and on the go, for a more ubiquitous learning experience. However, mainly the MOOC content was optimized for small screens, but mobile devices provide the opportunity to enrich the MOOC experience even further by...
Conference Paper
Full-text available
Dieser Beitrag beschreibt wie mithilfe von Learning Analytics Daten eine automatisierte Qualitätssicherung in MOOCs durchgeführt werden kann. Die Ergebnisse sind auch für andere skalierende E-Learning Systeme anwendbar. Hierfür wird zunächst beschrieben, wie in den untersuchten Systemen (die als verteilte Dienste in einer Microservice-Architektur i...
Conference Paper
Web-based E-Learning uses Internet technologies and digital media to deliver education content to learners. Many universities in recent years apply their capacity in producing Massive Open Online Courses (MOOCs). They have been offering MOOCs with an expectation of rendering a comprehensive online apprenticeship. Typically, an online content delive...
Conference Paper
This paper presents a novel approach to understand specific student behavior in MOOCs. Instructors currently perceive participants only as one homogeneous group. In order to improve learning outcomes, they encourage students to get active in the discussion forum and remind them of approaching deadlines. While these actions are most likely helpful,...
Conference Paper
A wide range of Massive Open Online Courses (MOOCs) on various topics has been offered since 2008. The high expectations of this new way of teaching, however, were not entirely met until now due to different reasons. To better engage participants in MOOCs, gamification was implemented on many platforms; especially since gamification became a buzz-w...
Book
Full-text available
Die digitale Entwicklung durchdringt unser Bildungssystem, doch Schulen sind auf die Veränderungen kaum vorbereitet: Überforderte Lehrer/innen, infrastrukturell schwach ausgestattete Unterrichtsräume und unzureichend gewartete Computernetzwerke sind keine Seltenheit. Veraltete Hard- und Software erschweren digitale Bildung in Schulen eher, als dass...
Conference Paper
Die Glaubwürdigkeit und Überprüfbarkeit der Zertifikate ist ein wesentlicher Bestandteil von jeglicher Form von zertifiziertem Training. Diese Aussage gilt natürlich auch für MOOCs. In diesem Kontext kommt allerdings erschwerend hinzu, dass eine individuelle, persönliche Beaufsichtigung der Prüfungen tausender TeilnehmerInnen offline nur schwer zu...
Article
Full-text available
div class="page" title="Page 1"> The openSAP University is a co-innovative initiative founded in 2013 by SAP SE in partnership with the Hasso-Plattner-Institute (HPI) located in Potsdam, Germany. With its new course offering, SAP responds to a rising demand for scalable knowledge transfer due to the digital transformation by making use of the Mass...
Chapter
In many MOOCs hands-on exercises are a key component. Their format must be deliberately planned to satisfy the needs of a more and more heterogeneous student body. At the same time, costs have to be kept low for maintenance and support on the course provider's side. The paper at hand reports about our experiments with a tool called Vagrant in this...
Conference Paper
Full-text available
The paper at hand introduces CodeOcean, a web-based platform to provide practical programming exercises. CodeOcean is designed to be used in Massive Open Online Courses (MOOCs) to teach programming to beginners. CodeOcean’s concept and implementation are discussed with regard to tools provided to students and teachers, sandboxed and scalable code e...
Conference Paper
This paper at hand describes the design and implementation of an analytics service to retrieve live usage data from students enrolled in a service-oriented MOOC platform for the purpose of learning analytics (LA) research. A real-time and extensible architecture for consolidating and processing data in versatile analytics stores is introduced.
Conference Paper
Full-text available
Massive Open Online Courses (MOOCs) have revolutionized higher education by offering university-like courses for a large amount of learners via the Internet. The paper at hand takes a closer look on peer assessment as a tool for delivering individualized feedback and engaging assignments to MOOC participants. Benefits, such as scalability for MOOCs...
Conference Paper
In recent years, Massive Open Online Courses (MOOCs) have become a phenomenon offering the possibility to teach thousands of participants simultaneously. In the same time the platforms used to deliver these courses are still in their fledgling stages. While course content and didactics of those massive courses are the primary key factors for the su...
Conference Paper
Full-text available
Credibility is a central feature for every certified training. The same applies for MOOCs. Individual supervision of participants in study centers reaches its limits when having thousands of students. Thus online proctoring as a means to handle the amount of participants in MOOCs seems to be a suitable way to increase certificate valuation. We comp...
Conference Paper
Full-text available
In recent years, Massive Open Online Courses (MOOCs) have become a phenomenon presenting the prospect of free high class education to everybody. They bear a tremendous potential for teaching programming to a large and diverse audience. The typical MOOC components, such as video lectures, reading material, and easily assessable quizzes, however, are...
Conference Paper
Full-text available
In recent years, Massive Open Online Courses (MOOCs—particularly, platform-based or so called xMOOCs) have become a phenomenon presenting the prospect of free high class education to anyone by offering the possibility to teach thousands of participants simultaneously. MOOCs are a highly effective and valuable tool in the context of life-long learni...
Conference Paper
The paper at hand evaluates the Massive Open On- line Course (MOOC) Spielend Programmieren Lernen (Playfully learning to program), an effort to scale the youth development program at the Hasso Plattner Institute (HPI) for a larger audience. The HPI has a strong tradition in attracting children and adolescents to take their first steps towards a car...
Conference Paper
Full-text available
Massive Open Online Courses have gained more and more popularity in the recent years. Video Content contributes a vital aspect of the learning experience in MOOCs. The paper at hand proposes ways to optimize the video experience in MOOCs. Single stream videos will be considered as well as the openHPI's dual stream video player. openHPI is the MOOC...
Conference Paper
This paper presents our findings of a comparison study conducted on three iterations of a MOOC run on our platform openHPI. We present the main facts shared by the courses and the planned as well as occurred differences. Additionally, we discuss the added technical features such as user groups along with the expected and actual outcomes. We relate...
Conference Paper
High dropout rates and poor user participation are some of the major challenges for xMOOC providers. Similar to others, openHPI also faces these problems. Gamification is a mechanism that recently has been successfully employed to raise user motivation in web applications. A concept to gamify the openHPI platform has been proposed and implemented....
Conference Paper
Full-text available
Particularly in the context of education and e-learning, the topics social interaction and collaboration have been a little strained during the recent decades. Particularly, stakeholders1 with an educational background often criticize that xMOOCs follow an approach that is too close to traditional frontal instruction; that they lack sophisticated o...
Conference Paper
Full-text available
Particularly in the context of education and e-learning, the topics social interaction and collaboration have been a little strained during the recent decades. Particularly, stakeholders1 with an educational background often criticize that xMOOCs follow an approach that is too close to traditional frontal instruction; that they lack sophisticated o...
Conference Paper
Full-text available
A lot of research has been done in maintaining and increasing the intrinsic motivation of learners within online courses. Especially in Massive Open Online Courses (MOOCs), where, due to the high amount of course participants, personal supervision cannot be offered this is crucial to avoid high dropout rates. The users’ journey into the world of on...
Conference Paper
Full-text available
The process of assessment grading does not end on publishing the grades and assessment results. Often, discussions about single grades arise in post-exam reviews. While in traditional teaching and smaller online classes this can be handled on a per-user based approach, in Massive Open Online Courses (MOOCs) with thousands of e-assessment submission...
Conference Paper
Full-text available
There is a great demand for hands-on training in engineering education. In the context of a Massive Open Online Course (MOOC), assessing these experiments manually by teaching assistants is not possible owed to the high number of participants and the resulting workload for the teaching team. Systems for machine-based assessment of coding tasks are...
Conference Paper
Full-text available
openHPI is the educational Internet platform of the German Hasso Plattner Institute (HPI), Potsdam. The HPI offers massive open online courses covering different subjects in Information and Communications Technology (ICT) on the platform. Five courses have been concluded after one year of operation in German as well as in English language, each wit...
Conference Paper
Massive Open Online Courses (MOOCs) have been one of the major trend topics of the last years within the e-learning community. Many companies, such as Coursera, edX and Udacity, launched MOOCs offering a broad range of topics. In this paper, the authors will take a look at the mobile support of different MOOC providers. Use cases and benefits of mo...

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