@phdthesis{Peterson2008,
  author    = {Peterson, Leif Arne},
  title     = {Zum Tragverhalten nachgiebig verbundener Biegetr{\"a}ger aus Holz},
  publisher = {Fraunhofer IRB Verlag},
  address   = {Stuttgart},
  isbn      = {9783816775973},
  pages     = {169 Seiten},
  year      = {2008},
  abstract  = {In der vorliegenden Dissertation werden zun{\"a}chst die linear elastischen Bemessungsm{\"o}glichkeiten f{\"u}r nachgiebig verbundene Biegetr{\"a}ger unter statischer und dynamischer Beanspruchung diskutiert. Zum Vergleich wurden praktische Untersuchungen an zweiteiligen Kantholzbiegetr{\"a}gem mit mechanischen Verbindungsmitteln unterschiedlicher Verformungscharakteristika durchgef{\"u}hrt, ebenso wie umfangreiche Materialpr{\"u}fungen an den zusammengef{\"u}gten Einzelquerschnitten. Hierdurch werden die Unterschiede zum realen, nicht elastischen, statischen Tragverhalten aufgezeigt. Der f{\"u}r das dynamische Verhalten maßgebende Systemparameter der Eigenfrequenz wird f{\"u}r mehrteilige Biegetr{\"a}ger theoretisch hinterfragt und an den nachgiebig verbundenen Kantholzbiegetr{\"a}gem gemessen. Begleitet von weiteren praktischen Untersuchungen an einzelnen Verbindungsmitteln unter Blockscherbeanspruchung wird die rechnerische Ber{\"u}cksichtigung des plastischen Verbindungsmittelverhaltens auf zwei theoretischen Wegen erforscht. Auf Grundlage der Untersuchungen wird ein neues, semianalytisches y-Verfahren entwickelt. Gegen{\"u}ber den Berechnungen mit finiten Volumen- und Kontakt-Elementen erweist sich das neue Verfahren auf Basis der, um die schubweichen Fugen erweiterten, Balkentheorie als leistungsf{\"a}higer. Der Einfluss des plastischen Verbindungsmittelverhaltens wird durch vergleichende Parameterstudien mit diesem neuen Verfahren als vom anerkannten Stand der Technik ausreichend ber{\"u}cksichtigt identifiziert. F{\"u}r die linear elastische Dimensionierung werden optimierte Verbindungsmittelanordnungen hergeleitet, die durch {\"u}bersichtliche Erg{\"a}nzungen zum existierenden Bemessungskonzept des y-Verfahrens eine exaktere Berechnung erm{\"o}glichen.},
  language  = {de}
}
@article{NabilPetersonSchmidtetal.2010,
  author    = {Nabil, F. and Peterson, Leif Arne and Schmidt, A. and Geerdes, D.},
  title     = {Die Holzkuppel des Neuen Palais in Potsdam},
  series = {Bauingenieur},
  volume    = {85},
  journal   = {Bauingenieur},
  number    = {8},
  publisher = {Springer-VDI-Verlag},
  address   = {D{\"u}sseldorf},
  issn      = {0005-6650},
  pages     = {324 -- 330},
  year      = {2010},
  language  = {de}
}
@book{NebgenPeterson2015,
  author    = {Nebgen, Nikolaus and Peterson, Leif Arne},
  title     = {Holzbau kompakt nach Eurocode 5},
  edition   = {5. Auflage},
  publisher = {Beuth},
  address   = {Berlin},
  isbn      = {978-3-410-25455-3},
  pages     = {XII, 267 Seiten},
  year      = {2015},
  abstract  = {"Holzbau kompakt" wurde sowohl f{\"u}r Studierende als auch Praktiker konzipiert und beschr{\"a}nkt sich nicht auf reine Holzbauaufgaben, sondern setzt sich ggf. auch mit der Tragwerkslehre auseinander. Die Neuauflage basiert auf dem Eurocode 5 und ber{\"u}cksichtigt zahlreiche neue Erkenntnisse aus Forschung und praxisnaher Entwicklung. Neben den Grundlagen der Bemessung, der Baustoffe, der Dauerhaftigkeit und des Brandschutzes konzentriert sich das Grundlagenwerk besonders auf das Konstruieren mit Holz und Holzwerkstoffen, anschaulich dargestellt an sehr ausf{\"u}hrlichen Beispielen f{\"u}r Wohnhaus und Hallentragwerk.},
  language  = {de}
}
@book{HolschemacherPetersPetersonetal.2013,
  author    = {Holschemacher, Klaus and Peters, Klaus and Peterson, Leif Arne and Schneider, Klaus-J{\"u}rgen and Thiele, Ralf},
  title     = {Konstruktiver Ingenieurbau kompakt: Formelsammlung und Bemessungshilfen nach Eurocode f{\"u}r die Bereiche: Lastannahmen, Holzbau, Mauerwerksbau, Stahlbau, Stahlbetonbau, Geotechnik, statische Hinweise},
  edition   = {4., vollst{\"a}ndig {\"u}berarbeitete Auflage},
  publisher = {Beuth},
  address   = {Berlin},
  isbn      = {978-3-410-22775-5},
  pages     = {384 Seiten},
  year      = {2013},
  abstract  = {Das kompakte Nachschlagewerk f{\"u}r den konstruktiven Ingenieurbau wurde f{\"u}r den t{\"a}glichen Gebrauch auf der Baustelle konzipiert und stellt alle f{\"u}r die rechnerische Nachweisf{\"u}hrung und Konstruktion von Bauteilen wichtigsten Angaben in Form einer Formelsammlung mit Nachweishilfen zur Verf{\"u}gung. Der Inhalt wurde auf Basis der neuen Eurocodes komplett aktualisiert und erweitert. Die 4. Auflage enth{\"a}lt in bew{\"a}hrter Manier eine umfangreiche Formelsammlung, Querschnittswerte und Bemessungshilfen zu den Bereichen Lastannahmen, Holzbau, Mauerwerksbau, Stahlbau, Stahlbetonbau, Geotechnik sowie statische Hinweise. Farbiges Papier erleichtert den zielgerichteten Zugriff auf die einzelnen Fachgebiete.},
  language  = {de}
}
@incollection{FruehwaldPetersonHasenstab2012,
  author    = {Fr{\"u}hwald, Katja and Peterson, Leif Arne and Hasenstab, Andreas},
  title     = {Pr{\"u}fverfahren zur Begutachtung der Materialeigenschaften von Holztragwerken},
  series = {Bauphysik-Kalender 2012: Schwerpunkt: Geb{\"a}udediagnostik},
  booktitle = {Bauphysik-Kalender 2012: Schwerpunkt: Geb{\"a}udediagnostik},
  editor    = {Fouad, Nabil A.},
  publisher = {Ernst \& Sohn},
  address   = {Berlin},
  isbn      = {9783433029862 (Print)},
  doi       = {10.1002/9783433601235.ch4},
  pages     = {103 -- 155},
  year      = {2012},
  abstract  = {Dieses Kapitel beinhaltet: - Einleitung - Ausgew{\"a}hlte typische Sch{\"a}den an Holzbauwerken - Das Material Holz und seine Besonderheiten - Bestandserfassung - Labormethoden - Begutachtungsbeispiele - Zusammenfassung und Schlussfolgerungen - Literatur},
  language  = {de}
}
@article{KetelhutBrueggeGoelletal.2020,
  author    = {Ketelhut, Maike and Br{\"u}gge, G. M. and G{\"o}ll, Fabian and Braunstein, Bjoern and Albracht, Kirsten and Abel, Dirk},
  title     = {Adaptive iterative learning control of an industrial robot during neuromuscular training},
  series = {IFAC PapersOnLine},
  volume    = {53},
  journal   = {IFAC PapersOnLine},
  number    = {2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {2405-8963},
  doi       = {10.1016/j.ifacol.2020.12.741},
  pages     = {16468 -- 16475},
  year      = {2020},
  abstract  = {To prevent the reduction of muscle mass and loss of strength coming along with the human aging process, regular training with e.g. a leg press is suitable. However, the risk of training-induced injuries requires the continuous monitoring and controlling of the forces applied to the musculoskeletal system as well as the velocity along the motion trajectory and the range of motion. In this paper, an adaptive norm-optimal iterative learning control algorithm to minimize the knee joint loadings during the leg extension training with an industrial robot is proposed. The response of the algorithm is tested in simulation for patients with varus, normal and valgus alignment of the knee and compared to the results of a higher-order iterative learning control algorithm, a robust iterative learning control and a recently proposed conventional norm-optimal iterative learning control algorithm. Although significant improvements in performance are made compared to the conventional norm-optimal iterative learning control algorithm with a small learning factor, for the developed approach as well as the robust iterative learning control algorithm small steady state errors occur.},
  language  = {en}
}
@article{KetelhutKolditzGoelletal.2019,
  author    = {Ketelhut, Maike and Kolditz, Melanie and G{\"o}ll, Fabian and Braunstein, Bjoern and Albracht, Kirsten and Abel, Dirk},
  title     = {Admittance control of an industrial robot during resistance training},
  series = {IFAC-PapersOnLine},
  volume    = {52},
  journal   = {IFAC-PapersOnLine},
  number    = {19},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {2405-8963},
  doi       = {10.1016/j.ifacol.2019.12.102},
  pages     = {223 -- 228},
  year      = {2019},
  abstract  = {Neuromuscular strength training of the leg extensor muscles plays an important role in the rehabilitation and prevention of age and wealth related diseases. In this paper, we focus on the design and implementation of a Cartesian admittance control scheme for isotonic training, i.e. leg extension and flexion against a predefined weight. For preliminary testing and validation of the designed algorithm an experimental research and development platform consisting of an industrial robot and a force plate mounted at its end-effector has been used. Linear, diagonal and arbitrary two-dimensional motion trajectories with different weights for the leg extension and flexion part are applied. The proposed algorithm is easily adaptable to trajectories consisting of arbitrary six-dimensional poses and allows the implementation of individualized trajectories.},
  language  = {en}
}
@inproceedings{KetelhutGoellBraunsteinetal.2019,
  author    = {Ketelhut, Maike and G{\"o}ll, Fabian and Braunstein, Bjoern and Albracht, Kirsten and Abel, Dirk},
  title     = {Iterative learning control of an industrial robot for neuromuscular training},
  series = {2019 IEEE Conference on Control Technology and Applications},
  booktitle = {2019 IEEE Conference on Control Technology and Applications},
  publisher = {IEEE},
  address   = {New York},
  isbn      = {978-1-7281-2767-5 (ePub)},
  doi       = {10.1109/CCTA.2019.8920659},
  pages     = {7 Seiten},
  year      = {2019},
  abstract  = {Effective training requires high muscle forces potentially leading to training-induced injuries. Thus, continuous monitoring and controlling of the loadings applied to the musculoskeletal system along the motion trajectory is required. In this paper, a norm-optimal iterative learning control algorithm for the robot-assisted training is developed. The algorithm aims at minimizing the external knee joint moment, which is commonly used to quantify the loading of the medial compartment. To estimate the external knee joint moment, a musculoskeletal lower extremity model is implemented in OpenSim and coupled with a model of an industrial robot and a force plate mounted at its end-effector. The algorithm is tested in simulation for patients with varus, normal and valgus alignment of the knee. The results show that the algorithm is able to minimize the external knee joint moment in all three cases and converges after less than seven iterations.},
  language  = {en}
}
@misc{BlottnerHastermannMuckeltetal.2019,
  author    = {Blottner, Dieter and Hastermann, Maria and Muckelt, Paul and Albracht, Kirsten and Schoenrock, Britt and Salanova, Michele and Warner, Martin and Gunga, Hans-Christian and Stokes, Maria},
  title     = {MYOTONES - Inflight muscle health status monitoring during long-duration space missions onboard the International Space Station: a single case study},
  series = {IAC Papers Archive},
  journal   = {IAC Papers Archive},
  publisher = {Pergamon},
  address   = {Oxford},
  issn      = {00741795},
  pages     = {2 Seiten},
  year      = {2019},
  abstract  = {The MYOTONES experiment is the first to monitor changes in the basic biomechanical properties (tone, elasticity and stiffness) of the resting human myofascial system due to microgravity with a oninvasive, portable device on board the ISS. The MyotonPRO device applies several brief mechanical stimuli to the surface of the skin, and the natural oscillation signals of the tissue beneath are detected and computed by the MyotonPRO. Thus, an objective, quick and easy determination of the state of the underlying tissue is possible. Two preflight, four inflight and four post flight measurements were performed on a male astronaut using the same 10 measurement points (MP) for each session. MPs were located on the plantar fascia, Achilles tendon, M. soleus, M. gastrocnemius, M. multifidus, M. splenius capitis, M. deltoideus anterior, M. rectus femoris, infrapatellar tendon, M. tibialis anterior. Subcutaneous tissues thickness above the MPs was measured using ultrasound imaging. Magnetic resonance images (MRI) of lower limb muscles and functional tests were also performed pre- and postflight. Our first measurements on board the ISS confirmed increased tone and stiffness of the lumbar multifidus muscle, an important trunk stabilizer, dysfunction of which is known to be associated with back pain. Furthermore, reduced tone and stiffness of Achilles tendon and plantar fascia were observed inflight vs. preflight, confirming previous findings from terrestrial analog studies and parabolic flights. Unexpectedly, the deltoid showed negative inflight changes in tone and stiffness, and increased elasticity, suggesting a potential risk of muscle atrophy in longer spaceflight that should be addressed by adequate inflight countermeasure protocols. Most values from limb and back MPS showed deflected patterns (in either directions) from inflight shortly after the re-entry phase on the landing day and one week later. Most parameter values then normalized to baseline after 3 weeks likely due to 1G re-adaptation and possible outcome of the reconditioning protocol. No major changes in subcutaneous tissues thickness above the MPs were found inflight vs preflight, suggesting no bias (i.e., fluid shift, extreme tissue thickening or loss). Pre- and postflight MRI and functional tests showed negligible changes in calf muscle size, power and force, which is likely due to training effects from current inflight exercise protocols. The MYOTONES experiment is currently ongoing to collect data from further crew members. The potential impact of this research is to better understand the effects of microgravity and countermeasures over the time course of an ISS mission cycle. This will enable exercise countermeasures to be tailored},
  language  = {en}
}
@article{BruksleChwallekKrastina2023,
  author    = {Bruksle, Ieva and Chwallek, Constanze and Krastina, Anzelika},
  title     = {Strengthening sustainability in entrepreneurship education - implications for shifting entrepreneurial thinking towards sustainability at universities},
  series = {ACTA PROSPERITATIS},
  volume    = {14},
  journal   = {ACTA PROSPERITATIS},
  number    = {1},
  publisher = {Sciendo},
  issn      = {1691-6077},
  doi       = {10.37804/1691-6077-2023-14-37-48},
  pages     = {37 -- 48},
  year      = {2023},
  abstract  = {By developing innovative solutions to social and environmental problems, sustainable ventures carry greatpotential. Entrepreneurship which focuses especially on new venture creation can be developed through education anduniversities, in particular, are called upon to provide an impetus for social change. But social innovations are associatedwith certain hurdles, which are related to the multi-dimensionality, i.e. the tension between creating social,environmental and economic value and dealing with a multiplicity of stakeholders. The already complex field ofentrepreneurship education has to face these challenges. This paper, therefore, aims to identify starting points for theintegration of sustainability into entrepreneurship education. To pursue this goal experiences from three differentproject initiatives between the partner universities: Lapland University of Applied Sciences, FH Aachen University ofApplied Sciences and Turiba University are reflected and findings are systematically condensed into recommendationsfor education on sustainable entrepreneurship.},
  language  = {en}
}