TY  - JOUR
A1  - Wolf, Martin
T1  - Groupware related task design
JF  - ACM SIGGROUP Bulletin
N2  - his report summarizes the results of a workshop on Groupware related task design which took place at the International Conference on Supporting Group Work Group'99, Arizona, from 14 th to 17 th November 1999.

The workshop was addressed to people from different
viewpoints, backgrounds, and domains:

- Researchers dealing with questions of task analysis
  and task modeling for Groupware application from an
  academic point of view. They may contribute modelbased design 
  approaches or theoretically oriented
  work

- Practitioners with experience in the design and
  everyday use of groupware systems. They might refer
  to the practical side of the topic: "real" tasks, "real"
  problems, "real" users, etc.
Y1  - 2000
U6  - http://dx.doi.org/10.1145/605660.605662
SN  - 2372-7403
VL  - 21
IS  - 2
SP  - 5
EP  - 8
ER  - 
TY  - JOUR
A1  - Chloé, Radermacher
A1  - Malyaran, Hanna
A1  - Craveiro, Rogerio Bastos
A1  - Peglow, Sarah
A1  - Behbahani, Mehdi
A1  - Pufe, Thomas
A1  - Wolf, Michael
A1  - Neuss, Sabine
T1  - Mechanical loading on cementoblasts: a mini review
JF  - Osteologie
N2  - Orthodontic treatments are concomitant with mechanical forces and thereby cause teeth movements. The applied forces are transmitted to the tooth root and the periodontal ligaments which is compressed on one side and tensed up on the other side. Indeed, strong forces can lead to tooth root resorption and the crown-to-tooth ratio is reduced with the potential for significant clinical impact. The cementum, which covers the tooth root, is a thin mineralized tissue of the periodontium that connects the periodontal ligament with the tooth and is build up by cementoblasts. The impact of tension and compression on these cells is investigated in several in vivo and in vitro studies demonstrating differences in protein expression and signaling pathways. In summary, osteogenic marker changes indicate that cyclic tensile forces support whereas static tension inhibits cementogenesis. Furthermore, cementogenesis experiences the same protein expression changes in static conditions as static tension, but cyclic compression leads to the exact opposite of cyclic tension. Consistent with marker expression changes, the singaling pathways of Wnt/ß-catenin and RANKL/OPG show that tissue compression leads to cementum degradation and tension forces to cementogenesis. However, the cementum, and in particular its cementoblasts, remain a research area which should be explored in more detail to understand the underlying mechanism of bone resorption and remodeling after orthodontic treatments.
KW  - Cementoblast
KW  - Compression
KW  - Tension
KW  - Mechanotransduction
KW  - Forces
Y1  - 2022
U6  - http://dx.doi.org/10.1055/a-1826-0777
SN  - 1019-1291
VL  - 31
IS  - 2
SP  - 111
EP  - 118
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Lenz, Maximilian
A1  - Kahmann, Stephanie Lucina
A1  - Behbahani, Mehdi
A1  - Pennig, Lenhard
A1  - Hackl, Michael
A1  - Leschinger, Tim
A1  - Müller, Lars Peter
A1  - Wegmann, Kilian
T1  - Influence of rotator cuff preload on fracture configuration in proximal humerus fractures: a proof of concept for fracture simulation
JF  - Archives of Orthopaedic and Trauma Surgery
N2  - Introduction
In regard of surgical training, the reproducible simulation of life-like proximal humerus fractures in human cadaveric specimens is desirable. The aim of the present study was to develop a technique that allows simulation of realistic proximal humerus fractures and to analyse the influence of rotator cuff preload on the generated lesions in regards of fracture configuration.

Materials and methods
Ten cadaveric specimens (6 left, 4 right) were fractured using a custom-made drop-test bench, in two groups. Five specimens were fractured without rotator cuff preload, while the other five were fractured with the tendons of the rotator cuff preloaded with 2 kg each. The humeral shaft and the shortened scapula were potted. The humerus was positioned at 90° of abduction and 10° of internal rotation to simulate a fall on the elevated arm. In two specimens of each group, the emergence of the fractures was documented with high-speed video imaging. Pre-fracture radiographs were taken to evaluate the deltoid-tuberosity index as a measure of bone density. Post-fracture X-rays and CT scans were performed to define the exact fracture configurations. Neer’s classification was used to analyse the fractures.

Results
In all ten cadaveric specimens life-like proximal humerus fractures were achieved. Two III-part and three IV-part fractures resulted in each group. The preloading of the rotator cuff muscles had no further influence on the fracture configuration. High-speed videos of the fracture simulation revealed identical fracture mechanisms for both groups. We observed a two-step fracture mechanism, with initial impaction of the head segment against the glenoid followed by fracturing of the head and the tuberosities and then with further impaction of the shaft against the acromion, which lead to separation of the tuberosities.

Conclusion
A high energetic axial impulse can reliably induce realistic proximal humerus fractures in cadaveric specimens. The preload of the rotator cuff muscles had no influence on initial fracture configuration. Therefore, fracture simulation in the proximal humerus is less elaborate. Using the presented technique, pre-fractured specimens are available for real-life surgical education.
KW  - Proximal humerus fracture
KW  - Biomechanical simulation
KW  - Fracture configuration
KW  - Fracture simulation
KW  - Rotator cuff
Y1  - 2022
U6  - http://dx.doi.org/10.1007/s00402-022-04471-9
SN  - 1434-3916
PB  - Springer
CY  - Berlin, Heidelberg
ER  - 
TY  - JOUR
A1  - Malinowski, Daniel
A1  - Fournier, Yvan
A1  - Horbach, Andreas
A1  - Frick, Michael
A1  - Magliani, Mirko
A1  - Kalverkamp, Sebastian
A1  - Hildinger, Martin
A1  - Spillner, Jan
A1  - Behbahani, Mehdi
A1  - Hima, Flutura
T1  - Computational fluid dynamics analysis of endoluminal aortic perfusion
JF  - Perfusion
N2  - Introduction: In peripheral percutaneous (VA) extracorporeal membrane oxygenation (ECMO) procedures the femoral arteries perfusion route has inherent disadvantages regarding poor upper body perfusion due to watershed. With the advent of new long flexible cannulas an advancement of the tip up to the ascending aorta has become feasible. To investigate the impact of such long endoluminal cannulas on upper body perfusion, a Computational Fluid Dynamics (CFD) study was performed considering different support levels and three cannula positions.

Methods: An idealized literature-based- and a real patient proximal aortic geometry including an endoluminal cannula were constructed. The blood flow was considered continuous. Oxygen saturation was set to 80% for the blood coming from the heart and to 100% for the blood leaving the cannula. 50% and 90% venoarterial support levels from the total blood flow rate of 6 l/min were investigated for three different positions of the cannula in the aortic arch. 

Results: For both geometries, the placement of the cannula in the ascending aorta led to a superior oxygenation of all aortic blood vessels except for the left coronary artery. Cannula placements at the aortic arch and descending aorta could support supra-aortic arteries, but not the coronary arteries. All positions were able to support all branches with saturated blood at 90% flow volume.

Conclusions: In accordance with clinical observations CFD analysis reveals, that retrograde advancement of a long endoluminal cannula can considerably improve the oxygenation of the upper body and lead to oxygen saturation distributions similar to those of a central cannulation.
KW  - computational fluid dynamics analysis
KW  - simulation
KW  - endoluminal
KW  - aortic perfusion
KW  - extracorporeal membrane oxygenation
Y1  - 2022
U6  - http://dx.doi.org/10.1177/02676591221099809
SN  - 1477-111X
VL  - 0
IS  - 0
SP  - 1
EP  - 8
PB  - Sage
CY  - London
ER  - 
TY  - JOUR
A1  - Fabo, Sabine
ED  - Wirth, Jacob
T1  - Das Parasitäre in der Pandemie
JF  - Parasite Art
Y1  - 2022
IS  - Issue 2
SP  - 8
EP  - 11
PB  - Parasite Art
ER  - 
TY  - JOUR
A1  - Ulmer, Jessica
A1  - Braun, Sebastian
A1  - Cheng, Chi-Tsun
A1  - Dowey, Steve
A1  - Wollert, Jörg
T1  - Gamification of virtual reality assembly training: Effects of a combined point and level system on motivation and training results
JF  - International Journal of Human-Computer Studies
N2  - Virtual Reality (VR) offers novel possibilities for remote training regardless of the availability of the actual equipment, the presence of specialists, and the training locations. Research shows that training environments that adapt to users' preferences and performance can promote more effective learning. However, the observed results can hardly be traced back to specific adaptive measures but the whole new training approach. This study analyzes the effects of a combined point and leveling VR-based gamification system on assembly training targeting specific training outcomes and users' motivations. The Gamified-VR-Group with 26 subjects received the gamified training, and the Non-Gamified-VR-Group with 27 subjects received the alternative without gamified elements. Both groups conducted their VR training at least three times before assembling the actual structure. The study found that a level system that gradually increases the difficulty and error probability in VR can significantly lower real-world error rates, self-corrections, and support usages. According to our study, a high error occurrence at the highest training level reduced the Gamified-VR-Group's feeling of competence compared to the Non-Gamified-VR-Group, but at the same time also led to lower error probabilities in real-life. It is concluded that a level system with a variable task difficulty should be combined with carefully balanced positive and negative feedback messages. This way, better learning results, and an improved self-evaluation can be achieved while not causing significant impacts on the participants' feeling of competence.
KW  - Gamification
KW  - Virtual reality
KW  - Assembly
KW  - User study
KW  - Level system
Y1  - 2022
U6  - http://dx.doi.org/10.1016/j.ijhcs.2022.102854
SN  - 1071-5819
VL  - 165
IS  - Art. No. 102854
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
T1  - Optimization of very-low-thrust trajectories using evolutionary neurocontrol
JF  - Acta Astronautica
N2  - Searching optimal interplanetary trajectories for low-thrust spacecraft is usually a difficult and time-consuming task that involves much experience and expert knowledge in astrodynamics and optimal control theory. This is because the convergence behavior of traditional local optimizers, which are based on numerical optimal control methods, depends on an adequate initial guess, which is often hard to find, especially for very-low-thrust trajectories that necessitate many revolutions around the sun. The obtained solutions are typically close to the initial guess that is rarely close to the (unknown) global optimum. Within this paper, trajectory optimization problems are attacked from the perspective of artificial intelligence and machine learning. Inspired by natural archetypes, a smart global method for low-thrust trajectory optimization is proposed that fuses artificial neural networks and evolutionary algorithms into so-called evolutionary neurocontrollers. This novel method runs without an initial guess and does not require the attendance of an expert in astrodynamics and optimal control theory. This paper details how evolutionary neurocontrol works and how it could be implemented. The performance of the method is assessed for three different interplanetary missions with a thrust to mass ratio <0.15mN/kg (solar sail and nuclear electric).
Y1  - 2005
SN  - 1879-2030
VL  - 57
IS  - 2-8
SP  - 175
EP  - 185
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  - 
TY  - JOUR
A1  - Loeb, Horst Wolfgang
A1  - Schartner, Karl-Heinz
A1  - Dachwald, Bernd
A1  - Ohndorf, Andreas
A1  - Seboldt, Wolfgang
T1  - Interstellar heliopause probe
JF  - Труды МАИ
N2  - There is common agreement within the scientific community that in order to understand our local galactic environment it will be necessary to send a spacecraft into the region beyond the solar wind termination shock. Considering distances of 200 AU for a new mission, one needs a spacecraft traveling at a speed of close to 10 AU/yr in order to keep the mission duration in the range of less than 25 yrs, a transfer time postulated by European Space Agency (ESA). Two propulsion options for the mission have been proposed and discussed so far: the solar sail propulsion and the ballistic/radioisotope-electric propulsion (REP). As a further alternative, we here investigate a combination of solar-electric propulsion (SEP) and REP. The SEP stage consists of six 22-cms diameter RIT-22 ion thrusters working with a high specific impulse of 7377 s corresponding to a positive grid voltage of 5 kV. Solar power of 53 kW at begin of mission (BOM) is provided by a lightweight solar array.
Y1  - 2012
IS  - 60
SP  - 2
EP  - 2
PB  - Moskauer Staatliches Luftfahrtinstitut (МАИ)
CY  - Moskau
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
A1  - Erpicum, Sebastien
A1  - Peltier, Yann
A1  - Dewals, Benjamin
T1  - Unsteady shallow meandering flows in rectangular reservoirs: a modal analysis of URANS modelling
JF  - Journal of Hydro-environment Research
N2  - Shallow flows are common in natural and human-made environments. Even for simple rectangular shallow reservoirs, recent laboratory experiments show that the developing flow fields are particularly complex, involving large-scale turbulent structures. For specific combinations of reservoir size and hydraulic conditions, a meandering jet can be observed. While some aspects of this pseudo-2D flow pattern can be reproduced using a 2D numerical model, new 3D simulations, based on the unsteady Reynolds-Averaged Navier-Stokes equations, show consistent advantages as presented herein. A Proper Orthogonal Decomposition was used to characterize the four most energetic modes of the meandering jet at the free surface level, allowing comparison against experimental data and 2D (depth-averaged) numerical results. Three different isotropic eddy viscosity models (RNG k-ε, k-ε, k-ω) were tested. The 3D models accurately predicted the frequency of the modes, whereas the amplitudes of the modes and associated energy were damped for the friction-dominant cases and augmented for non-frictional ones. The performance of the three turbulence models remained essentially similar, with slightly better predictions by RNG k-ε model in the case with the highest Reynolds number. Finally, the Q-criterion was used to identify vortices and study their dynamics, assisting on the identification of the differences between: i) the three-dimensional phenomenon (here reproduced), ii) its two-dimensional footprint in the free surface (experimental observations) and iii) the depth-averaged case (represented by 2D models).
KW  - coherent structures
KW  - hydraulic modelling
KW  - model performance
KW  - Proper Orthogonal Decomposition
KW  - Q-criterion
Y1  - 2022
U6  - http://dx.doi.org/10.1016/j.jher.2022.03.002
SN  - 1570-6443
IS  - In Press
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bhattarai, Aroj
A1  - Horbach, Andreas
A1  - Staat, Manfred
A1  - Kowalczyk, Wojciech
A1  - Tran, Thanh Ngoc
T1  - Virgin passive colon biomechanics and a literature review of active contraction constitutive models
JF  - Biomechanics
N2  - The objective of this paper is to present our findings on the biomechanical aspects of the virgin passive anisotropic hyperelasticity of the porcine colon based on equibiaxial tensile experiments. Firstly, the characterization of the intestine tissues is discussed for a nearly incompressible hyperelastic fiber-reinforced Holzapfel–Gasser–Ogden constitutive model in virgin passive loading conditions. The stability of the evaluated material parameters is checked for the polyconvexity of the adopted strain energy function using positive eigenvalue constraints of the Hessian matrix with MATLAB. The constitutive material description of the intestine with two collagen fibers in the submucosal and muscular layer each has been implemented in the FORTRAN platform of the commercial finite element software LS-DYNA, and two equibiaxial tensile simulations are presented to validate the results with the optical strain images obtained from the experiments. Furthermore, this paper also reviews the existing models of the active smooth muscle cells, but these models have not been computationally studied here. The review part shows that the constitutive models originally developed for the active contraction of skeletal muscle based on Hill’s three-element model, Murphy’s four-state cross-bridge chemical kinetic model and Huxley’s sliding-filament hypothesis, which are mainly used for arteries, are appropriate for numerical contraction numerical analysis of the large intestine.
KW  - virgin passive
KW  - strain energy function
KW  - smooth muscle contraction
KW  - viscoelasticity
KW  - damage
Y1  - 2022
U6  - http://dx.doi.org/10.3390/biomechanics2020013
SN  - 2673-7078
VL  - 2
IS  - 2
SP  - 138
EP  - 157
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Golland, Alexander
A1  - Engling, Christoph
T1  - a-i3/BSI Symposium 2014: Sicherheit von Daten und Identitäten angesichts NSA und Big Data
JF  - DSB Datenschutz-Berater
Y1  - 2014
SN  - 0170-7256
VL  - 38
IS  - 7-8
SP  - 165
EP  - 166
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Peloni, Alessandro
A1  - Ceriotti, Matteo
A1  - Dachwald, Bernd
T1  - Solar-sail trajectory design for a multiple near-earth-asteroid rendezvous mission
JF  - Journal of Guidance, Control, and Dynamics
N2  - The scientific interest for near-Earth asteroids as well as the interest in potentially hazardous asteroids from the perspective of planetary defense led the space community to focus on near-Earth asteroid mission studies. A multiple near-Earth asteroid rendezvous mission with close-up observations of several objects can help to improve the characterization of these asteroids. This work explores the design of a solar-sail spacecraft for such a mission, focusing on the search of possible sequences of encounters and the trajectory optimization. This is done in two sequential steps: a sequence search by means of a simplified trajectory model and a set of heuristic rules based on astrodynamics, and a subsequent optimization phase. A shape-based approach for solar sailing has been developed and is used for the first phase. The effectiveness of the proposed approach is demonstrated through a fully optimized multiple near-Earth asteroid rendezvous mission. The results show that it is possible to visit five near-Earth asteroids within 10 years with near-term solar-sail technology.
Y1  - 2016
U6  - http://dx.doi.org/10.2514/1.G000470
SN  - 0731-5090
VL  - 39
IS  - 12
SP  - 2712
EP  - 2724
PB  - AIAA
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Datenschutz durch modulare Zertifizierung: Trusted Cloud-Pilotprojekt bringt neuen Ansatz
JF  - DSB Datenschutz-Berater
Y1  - 2014
SN  - 0170-7256
VL  - 38
IS  - 10
SP  - 213
EP  - 215
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
A1  - Engling, Christoph
T1  - Offene und geschlossene WLAN: Rechtliche Hürden bei Betrieb eines öffentlichen Internetzugangs
JF  - DSB Datenschutz-Berater
Y1  - 2015
SN  - 0170-7256
VL  - 39
IS  - 5
SP  - 102
EP  - 103
PB  - Beck
CY  - Gütersloh
ER  - 
TY  - JOUR
A1  - Golland, Alexander
A1  - Kriegesmann, Torben
ED  - Härting, Niko
T1  - Der Schutz virtueller Identitäten durch die DSGVO
JF  - PinG Privacy in Germany
N2  - Die Frage des Schutzes von virtuellen Identitäten ist – insbesondere bei Online-Medien – von elementarer Bedeutung: Ihre Beantwortung entscheidet über die Anwendbarkeit des Datenschutzrechts auf vermeintlich anonyme Nutzerprofile im Internet. Eine differenzierte Auseinandersetzung mit der Problematik, ob und unter welchen Umständen virtuelle Identitäten dem Datenschutzrecht unterfallen, fehlt bislang. Der vorliegende Beitrag gibt einen Überblick über den Schutz virtueller Identitäten und zeigt Ansätze auf, mittels derer bestimmt werden kann, wann virtuelle Identitäten nach Inkrafttreten der DSGVO durch das Datenschutzrecht geschützt werden.
Y1  - 2017
SN  - 2197-1862
U6  - http://dx.doi.org/10.37307/j.2196-9817.2017.02.03
VL  - 5
IS  - 2
SP  - 45
EP  - 50
PB  - Erich Schmidt Verlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Umsetzung der Datenschutz-Grundverordnung – Neue Herausforderungen für Unternehmen
JF  - NWB Rechnungswesen - BBK
N2  - Nach einem intensiven politischen Diskurs wurde im vergangenen Jahr die Datenschutz-Grundverordnung (DSGVO) verabschiedet. Die DSGVO ersetzt zum 25.5.2018 die bislang geltende, aus dem Jahre 1995 stammende Datenschutz-Richtlinie 95/46/EG. Die Novellierung des Datenschutzrechts bringt zahlreiche neue Anforderungen mit sich. Unternehmen sind daher gezwungen, sich auf die Änderungen einzustellen, ihre datenschutzrelevanten Prozesse im Hinblick auf die neuen Anforderungen zu überprüfen und bis zum Mai 2018 an der DSGVO auszurichten. Der Beitrag gibt einen kurzen Überblick über die zentralen Aspekte der Datenschutzreform und die damit einhergehenden Herausforderungen für Unternehmen.
Y1  - 2018
SN  - 0340-9848
IS  - 1
SP  - 35
EP  - 39
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Das Kopplungsverbot in der Datenschutz-Grundverordnung Anwendungsbereich, ökonomische Auswirkungen auf Web 2.0-Dienste und Lösungsvorschlag
JF  - MMR Multimedia und Recht
N2  - Das Kopplungsverbot fristete – obwohl in rechtswissenschaftlicher Literatur seit jeher diskutiert – unter der Geltung des BDSG ein Schattendasein. Mit der Datenschutz-Grundverordnung (DS-GVO) ist eine Änderung absehbar: Der neue Art. EWG_DSGVO Artikel 7 Abs. EWG_DSGVO Artikel 7 Absatz 4 DS-GVO stellt klar, dass die Leistungserbringung nicht von der Einwilligungserteilung abhängig gemacht werden darf. Doch dieses scheinbare Novum des Datenschutzrechts wirft zahlreiche Fragen auf. Während vor allem Vertreter der unternehmerischen Praxis die Anwendung des Kopplungsverbots in zahlreichen Konstellationen ablehnen, beschwören dessen Apologeten das Ende sämtlicher „datenfinanzierten“ Dienste herauf. Der vorliegende Beitrag gibt Einblick in die Regelungstiefe einer Norm, die das Web 2.0 revolutionieren könnte, und schlägt eine Lösung vor, die dem Schutz der Privatsphäre des Betroffenen und den wirtschaftlichen Interessen von Diensteanbietern gleichermaßen gerecht wird.
Y1  - 2018
SN  - 1434-596X
VL  - 21
IS  - 3
SP  - 130
EP  - 135
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Der räumliche Anwendungsbereich der DS-GVO
JF  - DuD Datenschutz und Datensicherheit
N2  - Die Datenschutz-Grundverordnung (DS-GVO) regelt in ihrem Art. 3 das räumlich anwendbare Datenschutzrecht und zielt dabei gerade auch auf Angebote nichteuropäischer Diensteanbieter ab. Die bisherige Diskussion konzentriert sich bislang in erster Linie darauf, das eingeführte Marktortprinzip zu thematisieren; das weitgehend unangetastete
Niederlassungsprinzip und vor allem die Probleme, die sich durch dessen unveränderte Beibehaltung ergeben, werden dagegen nicht erörtert. Der folgende Beitrag versucht sich an einer systematischen Analyse eines teils kontrovers, teils kaum diskutierten Themas.
Y1  - 2018
SN  - 1862-2607
VL  - 42
IS  - 6
SP  - 351
EP  - 357
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Gemeinsame Verantwortlichkeit in mehrstufigen Verarbeitungsszenarien
N2  - Die Rechtsfigur der gemeinsamen Verantwortlichkeit beschäftigt die datenschutzrechtliche Literatur seit Langem. Die Bestimmung der Verantwortlichkeit bei arbeitsteiligen Verarbeitungsverfahren, welche vor allem bei heutigen Plattformdiensten üblich sind, ist komplex: Stets sind mehrere Akteure beteiligt und in der Regel werden durch die Handlung eines Beteiligten mehrere Verarbeitungsschritte ausgelöst. Nun hat sich der EuGH in einem in mehrfacher Hinsicht bemerkenswerten Urteil geäußert.
Y1  - 2018
SN  - 1434-6354
N1  - Zugleich Kommentar zu EuGH, Urteil vom 5. 6. 2018 – C-210/16, K&R 2018, 475 ff. (in diesem Heft)
VL  - 21
IS  - 7-8
SP  - 433
EP  - 438
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Das neue kirchliche Datenschutzrecht – Herausforderungen für Unternehmen der Privatwirtschaft
JF  - DSB Datenschutz-Berater
Y1  - 2018
SN  - 0170-7256
VL  - 42
IS  - 9
SP  - 179
EP  - 181
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Bußgelder wegen Datenschutzverstößen – Vermeidung und Verteidigung.
Deutsche Aufsichtsbehörden setzen seit vergangenem Jahr zunehmend auf Sanktion
JF  - NWB Steuer- und Wirtschaftsrecht
Y1  - 2021
SN  - 0028-3460
VL  - 36
SP  - 2678
EP  - 2687
PB  - NWB-Verl.
CY  - Herne
ER  - 
TY  - JOUR
A1  - Defosse, Jerome
A1  - Kleinschmidt, Joris
A1  - Schmutz, Axel
A1  - Loop, Torsten
A1  - Staat, Manfred
A1  - Gatzweiler, Karl-Heinz
A1  - Wappler, Frank
A1  - Schieren, Mark
T1  - Dental strain on maxillary incisors during tracheal intubation with double-lumen tubes and different laryngoscopy techniques - a blinded manikin study
JF  - Journal of Cardiothoracic and Vascular Anesthesia
KW  - anaesthetic complications
KW  - dental trauma
KW  - difficult airway
KW  - double-lumen tube intubation
KW  - videolaryngoscopy
Y1  - 2022
U6  - http://dx.doi.org/10.1053/j.jvca.2022.02.017
SN  - 1053-0770
VL  - 36
IS  - 8, Part B
SP  - 3021
EP  - 3027
PB  - Elsevier
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Mandekar, Swati
A1  - Holland, Abigail
A1  - Thielen, Moritz
A1  - Behbahani, Mehdi
A1  - Melnykowycz, Mark
T1  - Advancing towards Ubiquitous EEG, Correlation of In-Ear EEG with Forehead EEG
JF  - Sensors
N2  - Wearable EEG has gained popularity in recent years driven by promising uses outside of clinics and research. The ubiquitous application of continuous EEG requires unobtrusive form-factors that are easily acceptable by the end-users. In this progression, wearable EEG systems have been moving from full scalp to forehead and recently to the ear. The aim of this study is to demonstrate that emerging ear-EEG provides similar impedance and signal properties as established forehead EEG. EEG data using eyes-open and closed alpha paradigm were acquired from ten healthy subjects using generic earpieces fitted with three custom-made electrodes and a forehead electrode (at Fpx) after impedance analysis. Inter-subject variability in in-ear electrode impedance ranged from 20 kΩ to 25 kΩ at 10 Hz. Signal quality was comparable with an SNR of 6 for in-ear and 8 for forehead electrodes. Alpha attenuation was significant during the eyes-open condition in all in-ear electrodes, and it followed the structure of power spectral density plots of forehead electrodes, with the Pearson correlation coefficient of 0.92 between in-ear locations ELE (Left Ear Superior) and ERE (Right Ear Superior) and forehead locations, Fp1 and Fp2, respectively. The results indicate that in-ear EEG is an unobtrusive alternative in terms of impedance, signal properties and information content to established forehead EEG.
KW  - in-ear EEG
KW  - correlation
KW  - forehead EEG
KW  - impedance spectroscopy
KW  - biopotential electrodes
Y1  - 2022
U6  - http://dx.doi.org/10.3390/s22041568
SN  - 1424-8220
VL  - 22
IS  - 4
SP  - 1
EP  - 19
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Blanke, Tobias
A1  - Reger, Vitali
A1  - Döring, Bernd
A1  - Göttsche, Joachim
A1  - Kuhnhenne, Markus
T1  - Koaxiale Stahlenergiepfähle
JF  - Stahlbau
N2  - Ein entscheidender Teil der Energiewende ist die Wärmewende im Gebäudesektor. Ein Schlüsselelement sind hier Wärmepumpen. Diese benötigen eine Wärmequelle, der sie Energie entziehen können, um sie auf ein höheres Temperaturniveau zu transformieren. Diese Wärmequelle kann bspw. das Erdreich sein, dessen Wärme durch Erdsonden erschlossen werden kann. In diesem Beitrag werden in Stahlpfähle integrierte Koaxialsonden mit dem Stand der Technik von Erdsonden gleichen Durchmessers bezüglich ihrer thermischen Leistungsmerkmale verglichen. Die Stahlenergiepfähle bieten neben der Wärmegewinnung weitere Vorteile, da sie auch eine statische Funktion übernehmen und rückstandsfrei zurückgebaut werden können. Es werden analytische und numerische Berechnungen vorgestellt, um die thermischen Potenziale beider Systeme zu vergleichen. Außerdem wird ein Testaufbau gezeigt, bei dem Stahlenergiepfähle in zwei verschiedenen Längen mit vorhandenen gängigen Erdsonden verglichen werden können. Die Berechnungen zeigen einen deutlichen thermischen Mehrertrag zwischen 26 % und 148 % der Stahlenergiepfähle gegenüber dem Stand der Technik abhängig vom Erdreich. Die Messergebnisse zeigen einen thermischen Mehrertrag von über 100 %. Es lässt sich also signifikante Erdsondenlänge einsparen. Dabei ist zu beachten, dass sich damit der thermisch genutzte Bereich des Erdreichs reduziert, wodurch die thermische Regeneration und/oder das Langzeitverhalten des Erdreichs an Bedeutung gewinnt.
Y1  - 2021
VL  - 90. 2021
IS  - 6
SP  - 417
EP  - 424
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Topçu, Murat
A1  - Madabhushi, Gopal S.P.
A1  - Staat, Manfred
T1  - A generalized shear-lag theory for elastic stress transfer between matrix and fibres having a variable radius
JF  - International Journal of Solids and Structures
N2  - A generalized shear-lag theory for fibres with variable radius is developed to analyse elastic fibre/matrix stress transfer. The theory accounts for the reinforcement of biological composites, such as soft tissue and bone tissue, as well as for the reinforcement of technical composite materials, such as fibre-reinforced polymers (FRP). The original shear-lag theory proposed by Cox in 1952 is generalized for fibres with variable radius and with symmetric and asymmetric ends. Analytical solutions are derived for the distribution of axial and interfacial shear stress in cylindrical and elliptical fibres, as well as conical and paraboloidal fibres with asymmetric ends. Additionally, the distribution of axial and interfacial shear stress for conical and paraboloidal fibres with symmetric ends are numerically predicted. The results are compared with solutions from axisymmetric finite element models. A parameter study is performed, to investigate the suitability of alternative fibre geometries for use in FRP.
KW  - Natural fibres
KW  - Polymer-matrix composites
KW  - Biocomposites
KW  - Stress concentrations
KW  - Finite element analysis
Y1  - 2022
U6  - http://dx.doi.org/10.1016/j.ijsolstr.2022.111464
SN  - 0020-7683
VL  - 239–240
IS  - Art. No. 111464
PB  - Elsevier
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Die Verarbeitung zum Zwecke der Vertragserfüllung – Leitlinien des Europäischen Datenschutzausschusses
JF  - DSB Datenschutz-Berater
Y1  - 2019
SN  - 0170-7256
VL  - 43
IS  - 7-8
SP  - 167
EP  - 168
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Reichweite des “Joint Controllership”: Neue Fragen der gemeinsamen Verantwortlichkeit Zugleich Kommentar zu EuGH, Urteil vom 29. 7. 2019 – C-40/1
JF  - K&R Kommunikation & Recht
N2  - Kein Urteil zum Datenschutzrecht sorgte im vergangenen Jahr für mehr panische Reaktionen als die Entscheidung des EuGH in der Rechtssache “Wirtschaftsakademie Schleswig-Holstein”(C-210/16). Das Urteil warf in datenschutzrechtlicher Literatur und Öffentlichkeit zahlreiche Fragen auf: Ist jetzt jeder “gemeinsam” Verantwortlicher? Was sind die Kriterien? Der EuGH hat kürzlich in einem – dem allgemeinen Vernehmen nach aufsehenerregenden, de facto aber kaum überraschenden – Urteil für Klarheit gesorgt. Dabei hat das Gericht jedoch einige Fragen offengelassen und neue Fragen aufgeworfen. Ein Blick auf alte und neue Herausforderungen in Kooperationsszenarien.
Y1  - 2019
SN  - 1434-6354
VL  - 22
IS  - 9
SP  - 533
EP  - 537
PB  - dfv Mediengruppe, Deutscher Fachverlag GmbH
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Golland, Alexander
ED  - Hoeren, Thomas
ED  - Schneider, Jochen
ED  - Selmayr, Martin
ED  - Spies, Axel
ED  - Wybitul, Tim
T1  - Gemeinsam einsam: Ein „Like“ für die gemeinsame Verantwortlichkeit?
JF  - ZD Zeitschrift für Datenschutz
Y1  - 2019
SN  - 2192-5593
VL  - 9
IS  - 9
SP  - 381
EP  - 382
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Das 2. Datenschutz-Anpassungs- und Umsetzungsgesetz EU Änderungen und Herausforderungen für Unternehmen
JF  - NWB Unternehmensteuern und Bilanzen – StuB
N2  - Kurz vor der parlamentarischen Sommerpause hat der Bundestag am 28.6.2019 das 2. Datenschutz-Anpassungs- und Umsetzungsgesetz EU (2. DSAnpUG-EU) beschlossen, der Bundesrat hat diesem Gesetz am 20.9.2019 zugestimmt. Das Artikelgesetz, welches im sog. Omnibusverfahren zahlreiche Gesetze auf Bundesebene ändert, soll zur Vereinheitlichung und Anpassung des Bundesrechts an die seit Mai 2018 geltende Datenschutz-Grundverordnung (DSGVO) beitragen.
KW  - Datenschutz
KW  - Datenschutzgrundverordnung
Y1  - 2019
SN  - 1615-8024
IS  - 20
SP  - 787
EP  - 790
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Datenschutzrechtliche Fragen personalisierter Preise — Herausforderungen von Algorithmen im Schnittbereich von Ethik, Ökonomie und Datenschutz
JF  - CR Computer und Recht
Y1  - 2020
SN  - 2194-4172
U6  - http://dx.doi.org/10.9785/cr-2020-360313
VL  - 36
IS  - 3
SP  - 186
EP  - 194
PB  - Verlag Dr. Otto Schmidt
CY  - Köln
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Verantwortlichkeit, Data Breach, das Ende von Fax & E-Mail: Aufsichtsbehörden mit streitbaren Thesen
JF  - DSB Datenschutz-Berater
Y1  - 2020
SN  - 0170-7256
VL  - 44
IS  - 4
SP  - 98
EP  - 100
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - EDPB: Europäische Aufsichtsbehörden mit neuen Guidelines zur datenschutzkonformen Einwilligung
JF  - DSB Datenschutz-Berater
Y1  - 2020
SN  - 0170-7256
VL  - 44
IS  - 6
SP  - 151
EP  - 153
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Weckruf für deutsche Großunternehmen? – Der neue Entwurf des IT-Sicherheitsgesetz 2.0
JF  - K&R Kommunikation & Recht
Y1  - 2020
SN  - 1434-6354
VL  - 23
IS  - 7-8
SP  - I
PB  - dfv Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Golland, Alexander
ED  - Hoeren, Thomas
ED  - Schneider, Jochen
ED  - Selmayr, Martin
ED  - Spies, Axel
ED  - Wybitul, Tim
T1  - Die „private“ Datenverarbeitung im Internet. Verantwortlichkeiten und Rechtmäßigkeit bei Nutzung von Plattformdiensten durch natürliche Personen
JF  - ZD Zeitschrift für Datenschutz
Y1  - 2020
SN  - 2192-5593
VL  - 10
IS  - 8
SP  - 397
EP  - 403
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Datenschutzkonforme Test-, Impf- und Genesungskontrollen in Betrieben der Privatwirtschaft
JF  - DSB Datenschutz-Berater
Y1  - 2021
SN  - 0170-7256
VL  - 45
IS  - 5
SP  - 158
EP  - 160
PB  - dfv Mediengruppe, Deutscher Fachverlag GmbH
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Cookies & Co. – trotz neuem Gesetz alte Probleme für Website-Betreiber. Anpassung des deutschen Rechts durch das TTDSG an unionsrechtliche Vorgaben zum 1.12.2021
JF  - NWB Steuer- und Wirtschaftsrecht
Y1  - 2021
SN  - 0028-3460
VL  - 2021
IS  - 25
SP  - 1818
EP  - 1825
PB  - NWB-Verlag
CY  - Basel
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Neuregelungen zum Datenschutz: Ein Update für Website-Betreiber. Reform des Telekom-munikations- und Telemedienrechts verabschiedet
JF  - NWB Rechnungswesen - BBK
Y1  - 2021
SN  - 0340-9848
IS  - 14
SP  - 672
EP  - 674
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Anforderungen an Transfer Impact Assessments bei Datentransfers in unsichere Drittländer
JF  - DSB Datenschutz-Berater
Y1  - 2021
SN  - 0170-7256
VL  - 45
IS  - 7-8
SP  - 229
EP  - 231
PB  - dfv Mediengruppe, Deutscher Fachverlag GmbH
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Golland, Alexander
ED  - Ewer, Wolfgang
ED  - Hamm, Rainer
ED  - Karpenstein, Ulrich
ED  - Oberthür, Nathalie
ED  - Herchen, Hilke
ED  - Bräutigam, Peter
T1  - Das Telekommunikation-Telemedien-Datenschutzgesetz. Cookies und PIMS als Herausforderungen für Website-Betreiber
JF  - NJW Neue Juristische Wochenschrift
Y1  - 2021
SN  - 0341-1915
IS  - 31
SP  - 2238
EP  - 2243
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Datenschutzrechtliche Anforderungen an internationale Datentransfers
JF  - NJW - Neue Juristische Wochenschrift
Y1  - 2020
SN  - 0341-1915
N1  - Zugleich Anmerkung zu EuGH, Urteil vom 16.7.2020 (C-311/18)
VL  - 2020
IS  - 36
SP  - 2593
EP  - 2596
PB  - Beck
CY  - München
ER  - 
TY  - JOUR
A1  - Golland, Alexander
T1  - Aufsicht und Rechtsdurchsetzung bei unzulässigem Einsatz von Cookies & Co. unter Geltung des TTDSG
JF  - DSB Datenschutz-Berater
KW  - Informationstechnik
KW  - Rechtsgebiet
KW  - Datenschutz
KW  - Bundesrepublik Deutschland
Y1  - 2022
SN  - 0170-7256
VL  - 46
IS  - 1
SP  - 14
EP  - 16
PB  - Deutscher Fachverlag GmbH
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Pöttgen, Philipp
A1  - Ederer, Thorsten
A1  - Altherr, Lena
A1  - Pelz, Peter F.
T1  - Developing a control strategy for booster stations under uncertain load
JF  - Applied Mechanics and Materials
N2  - Booster stations can fulfill a varying pressure demand with high energy-efficiency, because individual pumps can be deactivated at smaller loads. Although this is a seemingly simple approach, it is not easy to decide precisely when to activate or deactivate pumps. Contemporary activation controls derive the switching points from the current volume flow through the system. However, it is not measured directly for various reasons. Instead, the controller estimates the flow based on other system properties. This causes further uncertainty for the switching decision. In this paper, we present a method to find a robust, yet energy-efficient activation strategy.
KW  - Technical Operations Research (TOR)
KW  - Booster Station
KW  - Pump System
KW  - Discrete Optimization
Y1  - 2015
SN  - 1662-7482
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMM.807.241
N1  - Ebenfalls weltweit einsehbar unter:
http://wl.fst.tu-darmstadt.de/wl/publications/paper_151123_SFB805_
ICUME_Developing_a_Control_Strategy_for_Booster_Stations_under_Uncertain_Load_poettgen_ederer_pelz_altherr.pdf
VL  - 807
IS  - 807
SP  - 241
EP  - 246
PB  - Trans Tech Publications
CY  - Bäch
ER  - 
TY  - JOUR
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Pöttgen, Philipp
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
ED  - Pelz, Peter F.
ED  - Groche, Peter
T1  - Multicriterial optimization of technical systems considering multiple load and availability scenarios
JF  - Applied Mechanics and Materials
N2  - Cheap does not imply cost-effective -- this is rule number one of zeitgeisty system design. The initial investment accounts only for a small portion of the lifecycle costs of a technical system. In fluid systems, about ninety percent of the total costs are caused by other factors like power consumption and maintenance. With modern optimization methods, it is already possible to plan an optimal technical system considering multiple objectives. In this paper, we focus on an often neglected contribution to the lifecycle costs: downtime costs due to spontaneous failures. Consequently, availability becomes an issue.
KW  - sustainability
KW  - availability
KW  - energy efficiency
KW  - mixed-integer linear programming
KW  - system synthesis
Y1  - 2015
SN  - 1660-9336
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMM.807.247
VL  - 807
SP  - 247
EP  - 256
ER  - 
TY  - JOUR
A1  - Pöttgen, Philipp
A1  - Ederer, Thorsten
A1  - Altherr, Lena
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
T1  - Examination and optimization of a heating circuit for energy-efficient buildings
JF  - Energy Technology
N2  - The conference center darmstadtium in Darmstadt is a prominent example of energy efficient buildings. Its heating system consists of different source and consumer circuits connected by a Zortström reservoir. Our goal was to reduce the energy costs of the system as much as possible. Therefore, we analyzed its supply circuits. The first step towards optimization is a complete examination of the system: 1) Compilation of an object list for the system, 2) collection of the characteristic curves of the components, and 3) measurement of the load profiles of the heat and volume-flow demand. Instead of modifying the system manually and testing the solution by simulation, the second step was the creation of a global optimization program. The objective was to minimize the total energy costs for one year. We compare two different topologies and show opportunities for significant savings.
KW  - energy transfer
KW  - heating system
KW  - programming
KW  - system optimization
KW  - technical operations research
Y1  - 2015
SN  - 2194-4296
U6  - http://dx.doi.org/10.1002/ente.201500252
VL  - 4
IS  - 1
SP  - 136
EP  - 144
PB  - WILEY-VCH Verlag
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Vergé, Angela
A1  - Pöttgen, Philipp
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Pelz, Peter F.
ED  - Greuloch, Ivo
ED  - Weber, Manfred
ED  - Meier, Miles
T1  - Lebensdauer als Optimierungsziel:  Algorithmische Struktursynthese am Beispiel eines hydrostatischen Getriebes
JF  - O+P – Ölhydraulik und Pneumatik
N2  - Verfügbarkeit und Nachhaltigkeit sind wichtige Anforderungen bei der Planung langlebiger technischer Systeme. Meist werden bei Lebensdaueroptimierungen lediglich einzelne Komponenten vordefinierter Systeme untersucht. Ob eine optimale Lebensdauer eine gänzlich andere Systemvariante bedingt, wird nur selten hinterfragt. Technical Operations Research (TOR) erlaubt es, aus Obermengen technischer Systeme automatisiert die lebensdaueroptimale Systemstruktur auszuwählen. Der Artikel zeigt dies am Beispiel eines hydrostatischen Getriebes.
Y1  - 2016
SN  - 1614-9602
VL  - 60
IS  - 1-2
SP  - 114
EP  - 121
PB  - Vereinigte Fachverl.
CY  - Mainz
ER  - 
TY  - JOUR
A1  - Altherr, Lena
A1  - Brötz, Nicolas
A1  - Dietrich, Ingo
A1  - Gally, Tristan
A1  - Geßner, Felix
A1  - Kloberdanz, Hermann
A1  - Leise, Philipp
A1  - Pelz, Peter Franz
A1  - Schlemmer, Pia
A1  - Schmitt, Andreas
T1  - Resilience in mechanical engineering - a concept for controlling uncertainty during design, production and usage phase of load-carrying structures
JF  - Applied Mechanics and Materials
N2  - Resilience as a concept has found its way into different disciplines to describe the ability of an individual or system to withstand and adapt to changes in its environment. In this paper, we provide an overview of the concept in different communities and extend it to the area of mechanical engineering. Furthermore, we present metrics to measure resilience in technical systems and illustrate them by applying them to load-carrying structures. By giving application examples from the Collaborative Research Centre (CRC) 805, we show how the concept of resilience can be used to control uncertainty during different stages of product life.
Y1  - 2018
SN  - 1662-7482
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMM.885.187
VL  - 885
SP  - 187
EP  - 198
PB  - Trans Tech Publications
CY  - Bäch
ER  - 
TY  - JOUR
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
A1  - Pöttgen, Philipp
ED  - Lübbecke, Marco
ED  - Koster, Arie
ED  - Letmathe, Peter
ED  - Madlener, Reihard
ED  - Peis, Britta
ED  - Walther, Grit
T1  - Experimental validation of an enhanced system synthesis approach
JF  - Operations Research Proceedings 2014
N2  - Planning the layout and operation of a technical system is a common task
for an engineer. Typically, the workflow is divided into consecutive stages: First,
the engineer designs the layout of the system, with the help of his experience or of
heuristic methods. Secondly, he finds a control strategy which is often optimized
by simulation. This usually results in a good operating of an unquestioned sys-
tem topology. In contrast, we apply Operations Research (OR) methods to find a
cost-optimal solution for both stages simultaneously via mixed integer program-
ming (MILP). Technical Operations Research (TOR) allows one to find a provable
global optimal solution within the model formulation. However, the modeling error
due to the abstraction of physical reality remains unknown. We address this ubiq-
uitous problem of OR methods by comparing our computational results with mea-
surements in a test rig. For a practical test case we compute a topology and control
strategy via MILP and verify that the objectives are met up to a deviation of 8.7%.
Y1  - 2014
SN  - 978-3-319-28695-2
U6  - http://dx.doi.org/10.1007/978-3-319-28697-6_1
PB  - Springer
CY  - Basel
ER  - 
TY  - JOUR
A1  - Grundlach, Michael
A1  - Baumann, Martin
A1  - Engelmann, Ulrich M.
ED  - Dössel, Olaf
T1  - How Multimodal Examinations Can Increase Sustainable Student Gain by Aligning Teaching and Assessment
JF  - Current Directions in Biomedical Engineering
N2  - Modern industry and multi-discipline projects require highly trained individuals with resilient science and engineering back-grounds. Graduates must be able to agilely apply excellent theoretical knowledge in their subject matter as well as essential practical “hands-on” knowledge of diverse working processes to solve complex problems. To meet these demands, university education follows the concept of Constructive Alignment and thus increasingly adopts the teaching of necessary practical skills to the actual industry requirements and assessment routines. However, a systematic approach to coherently align these three central teaching demands is strangely absent from current university curricula. We demonstrate the feasibility of implementing practical assessments in a regular theory-based examination, thus defining the term “blended assessment”. We assessed a course for natural science and engineering students pursuing a career in biomedical engineering, and evaluated the benefit of blended assessment exams for students and lecturers. Our controlled study assessed the physiological background of electrocardiograms (ECGs), the practical measurement of ECG curves, and their interpretation of basic pathologic alterations. To study on long time effects, students have been assessed on the topic twice with a time lag of 6 months. Our findings suggest a significant improvement in student gain with respect to practical skills and theoretical knowledge. The results of the reassessments support these outcomes. From the lecturers ́ point of view, blended assessment complements practical training courses while keeping organizational effort manageable. We consider blended assessment a viable tool for providing an improved student gain, industry-ready education format that should be evaluated and established further to prepare university graduates optimally for their future careers.
KW  - constructive alignment
KW  - examination
KW  - long-term retention
KW  - multimodal
KW  - practical learning
Y1  - 2021
SN  - 2364-5504
U6  - http://dx.doi.org/10.1515/cdbme-2021-2019
VL  - 7
IS  - 7/2
SP  - 73
EP  - 76
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Werfel, Stanislas
A1  - Günthner, Roman
A1  - Hapfelmeier, Alexander
A1  - Hanssen, Henner
A1  - Kotliar, Konstantin
A1  - Heemann, Uwe
A1  - Schmaderer, Christoph
ED  - Guzik, Tomasz J.
T1  - Identification of cardiovascular high-risk groups from dynamic retinal vessel signals using untargeted machine learning
JF  - Cardiovascular Research
N2  - Dynamic retinal vessel analysis (DVA) provides a non-invasive way to assess microvascular function in patients and potentially to improve predictions of individual cardiovascular (CV) risk. The aim of our study was to use untargeted machine learning on DVA in order to improve CV mortality prediction and identify corresponding response alterations.
KW  - Machine learning
KW  - Retinal vessels
KW  - Microcirculation
KW  - Haemodialysis
KW  - Myocardial infarction and cardiac death
Y1  - 2022
U6  - http://dx.doi.org/10.1093/cvr/cvab040
SN  - 0008-6363
VL  - 118
IS  - 2
SP  - 612
EP  - 621
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Albanna, Walid
A1  - Conzen, Catharina
A1  - Weiss, Miriam
A1  - Seyfried, Katharina
A1  - Kotliar, Konstantin
A1  - Schmidt, Tobias Philip
A1  - Kuerten, David
A1  - Hescheler, Jürgen
A1  - Bruecken, Anne
A1  - Schmidt-Trucksäss, Arno
A1  - Neumaier, Felix
A1  - Wiesmann, Martin
A1  - Clusmann, Hans
A1  - Schubert, Gerrit Alexander
T1  - Non-invasive assessment of neurovascular coupling after aneurysmal subarachnoid hemorrhage: a prospective observational trial using retinal vessel analysis
JF  - Frontiers in Neurology
N2  - Delayed cerebral ischemia (DCI) is a common complication after aneurysmal subarachnoid hemorrhage (aSAH) and can lead to infarction and poor clinical outcome. The underlying mechanisms are still incompletely understood, but animal models indicate that vasoactive metabolites and inflammatory cytokines produced within the subarachnoid space may progressively impair and partially invert neurovascular coupling (NVC) in the brain. Because cerebral and retinal microvasculature are governed by comparable regulatory mechanisms and may be connected by perivascular pathways, retinal vascular changes are increasingly recognized as a potential surrogate for altered NVC in the brain. Here, we used non-invasive retinal vessel analysis (RVA) to assess microvascular function in aSAH patients at different times after the ictus.
Y1  - 2021
U6  - http://dx.doi.org/10.3389/fneur.2021.690183
SN  - 1664-2295
VL  - 12
IS  - 12
SP  - 1
EP  - 15
ER  -