TY  - BOOK
A1  - Mühl, Thomas
T1  - Elektrische Messtechnik: Grundlagen, Messverfahren, Anwendungen
Y1  - 2020
SN  - 978-3-658-29115-0
U6  - https://doi.org/10.1007/978-3-658-29116-7
N1  - gedruckt in der Bereichsbibliothek Eupener Str. unter der Signatur 21 XXA 15(6);
auch als Online-Ressource ISBN 978-3-658-29116-7
PB  - Springer Vieweg
CY  - Wiesbaden
ET  - 6., überarbeitete Auflage
ER  - 
TY  - JOUR
A1  - Serror, Martin
A1  - Hack, Sacha
A1  - Henze, Martin
A1  - Schuba, Marko
A1  - Wehrle, Klaus
T1  - Challenges and Opportunities in Securing the Industrial Internet of Things
JF  - IEEE Transactions on Industrial Informatics
Y1  - 2021
U6  - https://doi.org/10.1109/TII.2020.3023507
SN  - 1941-0050
VL  - 17
IS  - 5
SP  - 2985
EP  - 2996
PB  - IEEE
CY  - New York
ER  - 
TY  - JOUR
A1  - Fiedler, Thomas M.
A1  - Ladd, Mark E.
A1  - Clemens, Markus
A1  - Bitz, Andreas
T1  - Safety of subjects during radiofrequency exposure in ultra-high-field magnetic resonance imaging
JF  - IEEE Letters on Electromagnetic Compatibility Practice and Applications
N2  - Magnetic resonance imaging (MRI) is one of the most important medical imaging techniques. Since the introduction of MRI in the mid-1980s, there has been a continuous trend toward higher static magnetic fields to obtain i.a. a higher signal-to-noise ratio. The step toward ultra-high-field (UHF) MRI at 7 Tesla and higher, however, creates several challenges regarding the homogeneity of the spin excitation RF transmit field and the RF exposure of the subject. In UHF MRI systems, the wavelength of the RF field is in the range of the diameter of the human body, which can result in inhomogeneous spin excitation and local SAR hotspots. To optimize the homogeneity in a region of interest, UHF MRI systems use parallel transmit systems with multiple transmit antennas and time-dependent modulation of the RF signal in the individual transmit channels. Furthermore, SAR increases with increasing field strength, while the SAR limits remain unchanged. Two different approaches to generate the RF transmit field in UHF systems using antenna arrays close and remote to the body are investigated in this letter. Achievable imaging performance is evaluated compared to typical clinical RF transmit systems at lower field strength. The evaluation has been performed under consideration of RF exposure based on local SAR and tissue temperature. Furthermore, results for thermal dose as an alternative RF exposure metric are presented.
Y1  - 2020
SN  - 2637-6423
U6  - https://doi.org/10.1109/LEMCPA.2020.3029747
VL  - 2
IS  - 3
SP  - 1
EP  - 8
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Hüning, Felix
A1  - Backes, Andreas
T1  - Direct observation of large Barkhausen jump in thin Vicalloy wires
JF  - IEEE Magnetics Letters
Y1  - 2020
SN  - 1949-307X
U6  - https://doi.org/10.1109/LMAG.2020.3046411
VL  - 11
IS  - Art. 2506504
SP  - 1
EP  - 4
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Hoegen, Anne von
A1  - Doncker, Rik W. De
A1  - Bragard, Michael
A1  - Hoegen, Svenja von
T1  - Problem-based learning in automation engineering: performing a remote laboratory aession aerving various educational attainments
T2  - 2021 IEEE Global Engineering Education Conference (EDUCON)
N2  - During the Covid-19 pandemic, vocational colleges, universities of applied science and technical universities often had to cancel laboratory sessions requiring students’ attendance. These above of all are of decisive importance in order to give learners an understanding of theory through practical work.This paper is a contribution to the implementation of distance learning for laboratory work applicable for several upper secondary educational facilities. Its aim is to provide a paradigm for hybrid teaching to analyze and control a non-linear system depicted by a tank model. For this reason, we redesign a full series of laboratory sessions on the basis of various challenges. Thus, it is suitable to serve different reference levels of the European Qualifications Framework (EQF).We present problem-based learning through online platforms to compensate the lack of a laboratory learning environment. With a task deduced from their future profession, we give students the opportunity to develop own solutions in self-defined time intervals. A requirements specification provides the framework conditions in terms of time and content for students having to deal with the challenges of the project in a self-organized manner with regard to inhomogeneous previous knowledge. If the concept of Complete Action is introduced in classes before, they will automatically apply it while executing the project.The goal is to combine students’ scientific understanding with a procedural knowledge. We suggest a series of remote laboratory sessions that combine a problem formulation from the subject area of Measurement, Control and Automation Technology with a project assignment that is common in industry by providing extracts from a requirements specification.
Y1  - 2021
U6  - https://doi.org/10.1109/EDUCON46332.2021.9453925
N1  - 2021 IEEE Global Engineering Education Conference (EDUCON), 21-23 April 2021, Vienna, Austria
SP  - 1605
EP  - 1614
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Hüning, Felix
A1  - Stüttgen, Marcel
T1  - Work in Progress: Interdisciplinary projects in times of COVID-19 crisis – challenges, risks and chances
T2  - 2021 IEEE Global Engineering Education Conference (EDUCON)
N2  - Project work and inter disciplinarity are integral parts of today's engineering work. It is therefore important to incorporate these aspects into the curriculum of academic studies of engineering. At the faculty of Electrical Engineering and Information Technology an interdisciplinary project is part of the bachelor program to address these topics. Since the summer term 2020 most courses changed to online mode during the Covid-19 crisis including the interdisciplinary projects. This online mode introduces additional challenges to the execution of the projects, both for the students as well as for the lecture. The challenges, but also the risks and chances of this kind of project courses are subject of this paper, based on five different interdisciplinary projects
Y1  - 2021
U6  - https://doi.org/10.1109/EDUCON46332.2021.9454006
N1  - 2021 IEEE Global Engineering Education Conference (EDUCON), 21-23 April 2021, Vienna, Austria
SP  - 1175
EP  - 1179
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Bitz, Andreas
A1  - Streckert, J.
A1  - Hansen, V.W.
A1  - Buschmann, J.
T1  - RF exposure of non restrained animals in an overmoded radial waveguide
T2  - 22nd BEMS Annual Meeting, Munich, Germany, 2000
Y1  - 2000
SP  - 63
PB  - Bioelectromagnetics Society
CY  - Frederick, MD
ER  - 
TY  - BOOK
A1  - Mühl, Thomas
T1  - Elektrische Messtechnik : Grundlagen, Messverfahren, Anwendungen
Y1  - 2017
SN  - 978-3-658-15719-7
U6  - https://doi.org/10.1007/978-3-658-15720-3
N1  - Signatur: 21 XXA 15(5)
PB  - Springer Vieweg
CY  - Wiesbaden
ET  - 5., überarbeitete und erweiterte Auflage
ER  - 
TY  - CHAP
A1  - Schwanke, Peter
A1  - Höfken, Hans-Wilhelm
A1  - Schuba, Marko
T1  - Security Analysis of the ADS Protocol of a Beckhoff CX2020 PLC
N2  - ICSs (Industrial Control Systems) and its subset SCADA systems (Supervisory Control and Data Acquisition) are getting exposed to a constant stream of new threats. The increasing importance of IT security in ICS requires viable methods to assess the security of ICS, its individual components, and its protocols. This paper presents a security analysis with focus on the communication protocols of a single PLC (Programmable Logic Controller). The PLC, a Beckhoff CX2020, is examined and new vulnerabilities of the system are revealed. Based on these findings recommendations are made to improve security of the Beckhoff system and its protocols.
Y1  - 2017
N1  - International Conference on Computer, Network Security and Communication Engineering (CNSCE 2017), March 26-27, 2017, Bangkok, Thailand
SP  - 1
EP  - 5
ER  - 
TY  - CHAP
A1  - Granat, Andreas
A1  - Höfken, Hans-Wilhelm
A1  - Schuba, Marko
T1  - Intrusion Detection of the ICS Protocol EtherCAT
N2  - Control mechanisms like Industrial Controls Systems (ICS) and its subgroup SCADA (Supervisory Control and Data Acquisition) are a prerequisite to automate industrial processes. While protection of ICS on process management level is relatively straightforward – well known office IT security mechanisms can be used – protection on field bus level is harder to achieve as there are real-time and production requirements like 24x7 to consider. One option to improve security on field bus level is to introduce controls that help to detect and to react on attacks. This paper introduces an initial set of intrusion detection mechanisms for the field bus protocol EtherCAT. To this end existing Ethernet attack vectors including packet injection and man-in-the-middle attacks are tested in an EtherCAT environment, where they could interrupt the EtherCAT network and may even cause physical damage. Based on the signatures of such attacks, a preprocessor and new rule options are defined for the open source intrusion detection system Snort demonstrating the general feasibility of intrusion detection on field bus level.
Y1  - 2017
N1  - International Conference on Computer, Network Security and Communication Engineering (CNSCE 2017), March 26-27, 2017, Bangkok, Thailand
SP  - 1
EP  - 5
ER  -