Publication List - Dr. Gerolf Ziegenhain
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@InCollection{AndersZiegenhainUrbassek:2010,
  author    = {Christian Anders and Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Stopping of clusters in solids}},
  booktitle = {COSIRES Krakau, Poland},
  year      = {2010},
  month     = {9},
  owner     = {gerolf},
  timestamp = {2009.04.18},
}

@CONFERENCE{RosandiZiegenhain:2010,
  author = {Yudi Rosandi and Gerolf Ziegenhain},
  title = {Mini-symposium: High performance computing and its applications on
	scientific research},
  booktitle = {The Third International Conference on Mathematics and Natural Sciences},
  year = {2010},
  month = {11},
  organization = {Institut Teknologi Bandung, Bandung, Indonesia},
  owner = {gerolf},
  timestamp = {2009.06.23}
}

@Conference{UrbassekZiegenhain:2009,
  author    = {Herbert M. Urbassek and Gerolf Ziegenhain and Christian Ringl},
  title     = {{Collisions of Dust Nanoclusters}},
  booktitle = {{International Workshop on Nanostructures in Silica}},
  year      = {2009},
  address   = {SaariselkŠŠ, Finland},
  month     = {9},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@INCOLLECTION{UrbassekUrbassekUrbassek:2008,
  author = {Herbert M. Urbassek and Steffen Zimmerman and Christian Anders and
	Gerolf Ziegenhain},
  title = {{Cluster-induced crater formation}},
  booktitle = {COSIRES Beijing, China},
  year = {2008},
  month = {9},
  owner = {gerolf},
  timestamp = {2009.04.18}
}

@CONFERENCE{Ziegenhain:2009,
  author = {Gerolf Ziegenhain},
  title = {Simulation of Rare Events},
  booktitle = {Lecture: Computational Materials Science - Advanced Topics},
  year = {2009},
  editor = {Herbert M. Urbassek},
  month = {25.6},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  timestamp = {2009.06.23}
}

@Conference{Ziegenhain2014,
  author       = {Gerolf Ziegenhain},
  title        = {{{Virtualisierung missionskritischer Infrastruktur}}},
  booktitle    = {Virtual Workplace Evolution},
  year         = {2014},
  address      = {Berlin},
  organization = {We.Connect - Global Leaders},
  note         = {Invited Speaker},
  owner        = {gerolf},
  timestamp    = {2014.05.07},
}

@Conference{Ziegenhain2013,
  author       = {Gerolf Ziegenhain},
  title        = {Vom Physiker zur Führungskraft},
  booktitle    = {{{Vortragsreihe "Physiker im Beruf"}}},
  year         = {2013},
  address      = {Kaiserslautern},
  month        = {12},
  organization = {TU Kaiserslautern},
  owner        = {gerolf},
  timestamp    = {2014.04.27},
}

@CONFERENCE{Ziegenhain:2012,
  author = {Gerolf Ziegenhain},
  title = {{Was haben Nanoindentation und Luftraumkontrolle gemeinsam?}},
  booktitle = {{Abschlusskolloquium DFG GRK 814}},
  year = {2012},
  month = {26.04},
  organization = {DFG},
  owner = {g},
  timestamp = {2012.04.24}
}

@Conference{Ziegenhain:2010a,
  author       = {Gerolf Ziegenhain},
  title        = {{How to Setup Your Own High-Performance Cluster}},
  booktitle    = {Linux Tag},
  year         = {2010},
  address      = {Berlin},
  month        = {6},
  organization = {Linux Tag},
  owner        = {gerolf},
  slides       = {http://g.ziegenhain.com/doc/talk/UnderstandingExtendingLAMMPS.pdf},
  timestamp    = {2009.04.18},
}

@CONFERENCE{Ziegenhain:2010b,
  author = {Gerolf Ziegenhain},
  title = {High-performance Computing zur atomistischen Simulation von Nanoindentation},
  booktitle = {Physics Department},
  year = {2010},
  month = {6},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  timestamp = {2009.06.23}
}

@Conference{Ziegenhain:2010c,
  author       = {Gerolf Ziegenhain},
  title        = {High Performance-Computing for the Atomistic Simulation of Plasticity in FCC Metals},
  booktitle    = {The Third International Conference on Mathematics and Natural Sciences},
  year         = {2010},
  address      = {Bandung, Indonesia},
  month        = {11},
  organization = {Institut Teknologi Bandung},
  owner        = {gerolf},
  timestamp    = {2009.06.23},
}

@Conference{Ziegenhain:2009b,
  author    = {Gerolf Ziegenhain},
  title     = {{Introduction to High-performance Computing}},
  booktitle = {{High-performance Computing Workshop}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009c,
  author    = {Gerolf Ziegenhain},
  title     = {{Technological Overview of High-performance Computing}},
  booktitle = {{High-performance Computing Workshop}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009d,
  author    = {Gerolf Ziegenhain},
  title     = {{Strategies in Cluster-design}},
  booktitle = {{High-performance Computing Workshop}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009e,
  author    = {Gerolf Ziegenhain},
  title     = {{High-performance Computing: A review of the past and an outlook to the future}},
  booktitle = {{High-performance Computing Workshop}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009f,
  author    = {Gerolf Ziegenhain},
  title     = {{Plasticity in FCC Metals}},
  booktitle = {{Physics Department, Universitas Padjadjaran}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009g,
  author    = {Gerolf Ziegenhain},
  title     = {{Parallel MD Simulations - Short Ranged Interactions in Homogenous Materials}},
  booktitle = {{Physics Department, Universitas Padjadjaran}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@Conference{Ziegenhain:2009h,
  author    = {Gerolf Ziegenhain},
  title     = {{Introduction Into Parallel Programming at the Example of the LAMMPS Code}},
  booktitle = {{High-performance Computing Workshop}},
  year      = {2009},
  address   = {Bandung, Indonesia},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.08.26},
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2008a,
  author = {Gerolf Ziegenhain},
  title = {{Onset of Plasticity Under Nanoindentation - Influence of the interatomic
	potential}},
  booktitle = {GK meeting},
  year = {2008},
  month = {3},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/OnsetOfPlasticityUnderNanoindentation.pdf},
  timestamp = {2009.04.18}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2008b,
  author = {Gerolf Ziegenhain},
  title = {{Anisotropic Effects in Nanoindentation - Crystalline Structure and
	Potentials}},
  booktitle = {Department Werkstoffwissenschaften Erlangen},
  year = {2008},
  month = {3},
  organization = {University Erlangen},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/Erlangen2008.pdf},
  timestamp = {2009.04.18}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2008d,
  author = {Gerolf Ziegenhain},
  title = {{Atomistic Simulations of Nanoindentation}},
  booktitle = {Fraunhofer ITWM High Performance Computing},
  year = {2008},
  month = {1},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/AtomisticSimulationsOfNanoindentation.pdf},
  timestamp = {2009.04.18}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2008e,
  author = {Gerolf Ziegenhain},
  title = {{From Fluid Dynamics to QM - Applications of the Lattice Boltzmann
	Method}},
  booktitle = {Computational Physics},
  year = {2008},
  month = {7},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/FromFluidDynamicsToQM.pdf},
  timestamp = {2009.04.18},
  url = {http://www.slideshare.net/secret/2KHFblxfBPgf7v}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2008f,
  author = {Gerolf Ziegenhain},
  title = {{Critical Slowing Down - Solid State Theory Approach for Determining
	a Glass Transition}},
  booktitle = {Computational Physics},
  year = {2008},
  month = {6},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/CriticalSlowingDown.pdf},
  timestamp = {2009.04.18},
  url = {http://www.slideshare.net/secret/bxyeMmmmaZFRzk}
}

@CONFERENCE{Ziegenhain:2007h,
  author = {Gerolf Ziegenhain},
  title = {{Simulations of Nanoindentation - Concepts and Results for Preliminary
	Model}},
  booktitle = {GK seminar},
  year = {2007},
  month = {5},
  organization = {TU Kaiserslautern},
  file = {TalkSlides.pdf:/home/gerolf/doc/diss/talks/ConceptsResultsPreliminaryModel2007/TalkSlides.pdf:PDF},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/ConceptsResultsPreliminaryModel.pdf},
  timestamp = {2007.07.18}
}

@CONFERENCE{Ziegenhain:2007i,
  author = {Gerolf Ziegenhain},
  title = {{Nanoindentation and -scratching}},
  booktitle = {GK Proceedings},
  year = {2007},
  organization = {TU Kaiserslautern},
  file = {report.pdf:/home/gerolf/doc/diss/reports/gk2007a/report.pdf:PDF},
  owner = {gerolf},
  timestamp = {2007.07.18}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2007a,
  author = {Gerolf Ziegenhain},
  title = {{Nanoindentation of Simple Crystals - Elastic and Plastic Properties}},
  booktitle = {DFG GK Meeting Potzberg},
  year = {2007},
  month = {10},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/NanoindentationSimpleCrystalsElasticPlastic.pdf},
  timestamp = {2009.04.18}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2007b,
  author = {Gerolf Ziegenhain},
  title = {{Atomistische Modellierung}},
  booktitle = {Tag der Physik},
  year = {2007},
  month = {12},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/AtomistischeModellierung.pdf},
  timestamp = {2009.04.18},
  url = {http://www.slideshare.net/secret/KAqCIPfH5IsOgL}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2007c,
  author = {Gerolf Ziegenhain},
  title = {{Vom singenden Draht zum DVB-C - Ist digitale Kommunikation effizienter?}},
  booktitle = {Tag der Physik},
  year = {2007},
  month = {12},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/DigitaleDatenuebertragung.pdf},
  timestamp = {2009.04.18},
  url = {http://www.slideshare.net/secret/KAqCIPfH5IsOgL}
}

@CONFERENCE{ZiegenhainZiegenhainZiegenhain:2007d,
  author = {Gerolf Ziegenhain},
  title = {{Rissausbreitung}},
  booktitle = {Tag der Physik},
  year = {2007},
  month = {12},
  organization = {TU Kaiserslautern},
  owner = {gerolf},
  slides = {http://g.ziegenhain.com/doc/talk/tutorial_Rissausbreitung.pdf},
  timestamp = {2009.04.18}
}

@INCOLLECTION{ZiegenhainZiegenhainZiegenhain:2006,
  author = {Gerolf Ziegenhain and Rolf Schilling},
  title = {{Mode coupling theory in two dimensions}},
  booktitle = {Materialwissenschaftliches Forschungszentrum der Johannes Gutenberg-Universität
	Mainz},
  year = {2006},
  month = {5},
  organization = {University Mainz},
  owner = {gerolf},
  poster = {http://g.ziegenhain.com/doc/diplomarbeit_poster.pdf},
  timestamp = {2009.04.18}
}

@Conference{ZiegenhainUrbassek:2009,
  author    = {Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Reversible Plasticity under Nanoindentation of fcc Metals}},
  booktitle = {MRS Fall Meeting},
  year      = {2009},
  address   = {Boston, MA, USA},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.09.03},
}

@Conference{ZiegenhainUrbassek:2009a,
  author    = {Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Nanoindentation into Structured Surfaces - Dependency on the Structure Size}},
  booktitle = {MRS Fall Meeting},
  year      = {2009},
  address   = {Boston, MA, USA},
  month     = {12},
  owner     = {gerolf},
  timestamp = {2009.09.03},
}

@Conference{Ziegenhain2017a,
  author    = {Gerolf Ziegenhain},
  title     = {{Using Linux in Air Traffic Control -- Hardware and Operating System Platforms}},
  booktitle = {FOSDEM},
  year      = {2017},
  address   = {Brussels},
  month     = {5.2.},
  note      = {Keynote},
  abstract  = {How can Open Source Software and safety critical systems work together? DFS GmbH relies on Linux for its core air traffic control systems. We have successfully managed to standardize a highly reliable, modular operating system and hardware platform at DFS.

In a brief overview we explain the challenges, technical and non-technical ones, we have faced getting to the modular platforms. What approaches did we take and why? Which ones did work out in the long end? We will cover a broad range of aspects ranging from hardware life cycles, application lifecycles, regulations, deployment solutions, user acceptance, cost cutting and testing.},
  url       = {https://fosdem.org/2017/schedule/event/air_traffic_control/},
}

@Conference{Ziegenhain2016,
  author       = {Gerolf Ziegenhain},
  title        = {Entwicklung missionskritischer Betriebssystem-Plattformen},
  booktitle    = {VMEA},
  year         = {2016},
  address      = {Siegburg},
  month        = {10.11},
  organization = {Ansstand e.V.},
  url          = {http://www.ansstand.de/VMEA/index.html},
}

@Conference{Ziegenhain2016a,
  author       = {Gerolf Ziegenhain},
  title        = {Virtualisierung missionskritischer Infrastrukturen},
  booktitle    = {SDe},
  year         = {2016},
  address      = {Berlin},
  month        = {17.11},
  organization = {We.connect - Global Leaders},
  url          = {http://software-defined-strategies.com/de/agenda/},
}

@Conference{Ziegenhain2016b,
  author       = {Gerolf Ziegenhain},
  title        = {{Arbeitsfeld IT - am Beispiel einer Führungskraft der Deutschen Flugsicherung (DFS)}},
  booktitle    = {Career Service},
  year         = {2016},
  address      = {Mainz},
  month        = {24.11},
  organization = {Johannes Gutenberg Universität},
  url          = {http://www.career.uni-mainz.de/1739_DEU_HTML.php#L_Arbeitsfeld_IT___am_Beispiel_einer_Fuehrungskraft_der_Deutschen_Flugsicherung__DFS_},
}

@Conference{Ziegenhain2017,
  author       = {Gerolf Ziegenhain},
  title        = {{{Alles nach Flugplan? Strategien, Ansätze und aktuelle Entwicklungen im Software Lizenzmanagement der DFS}}},
  booktitle    = {SAMS},
  year         = {2017},
  address      = {Berlin},
  month        = {6.3},
  organization = {We.Connect - Global Leaders},
  url          = {http://sam-strategies.de/de/sprecher/},
}

@Conference{Ziegenhain2017b,
  author    = {Gerolf Ziegenhain},
  title     = {{Using Linux in Air Traffic Control -- Hardware and Operating System Platforms}},
  booktitle = {Open Tech Day},
  year      = {2017},
  address   = {Utrecht},
  month     = {20.04},
  note      = {Keynote},
  abstract  = {How can Open Source Software and safety critical systems work together? DFS GmbH relies on Linux for its core air traffic control systems. We have successfully managed to standardize a highly reliable, modular operating system and hardware platform at DFS.

In a brief overview we explain the challenges, technical and non-technical ones, we have faced getting to the modular platforms. What approaches did we take and why? Which ones did work out in the long end? We will cover a broad range of aspects ranging from hardware life cycles, application lifecycles, regulations, deployment solutions, user acceptance, cost cutting and testing.},
  url       = {http://opentechday.nl/},
}

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@Article{Anders2012,
  author    = {Christian Anders and Eduardo M. Bringa and Fabricio D. Fioretti and Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Crater formation caused by nanoparticle impact: A molecular dynamics study of crater volume and shape}},
  journal   = {Physical Review B},
  year      = {2012},
  volume    = {85},
  pages     = {235440},
  doi       = {10.1103/PhysRevB.85.235440},
  timestamp = {2012.06.11},
  url       = {http://prb.aps.org/abstract/PRB/v85/i23/e235440},
}

@Article{AndersBringaZiegenhain:2012,
  author    = {Christian Anders and Eduardo M. Bringa and Gerolf Ziegenhain and Giles A. Graham and J. Freddy Hansen and Nigel Park and Nick E. Teslich and and Herbert M. Urbassek},
  title     = {Why Nanoprojectiles Work Differently than Macroimpactors: The Role of Plastic Flow},
  journal   = {PRL},
  year      = {2012},
  volume    = {108},
  pages     = {027601},
  doi       = {10.1103/PhysRevLett.108.027601},
  timestamp = {2012.01.12},
  url       = {http://prl.aps.org/toc/PRL/v108/i2},
}

@Article{AndersBringaZiegenhain:2011,
  author   = {Christian Anders and Eduardo M Bringa and Gerolf Ziegenhain and Herbert M Urbassek},
  title    = {Stopping of hypervelocity clusters in solids},
  journal  = {New Journal of Physics},
  year     = {2011},
  volume   = {13},
  number   = {11},
  pages    = {113019},
  abstract = {Using molecular-dynamics simulations, we study the processes underlying
	the stopping of energetic clusters upon impact in matter. We investigate
	self-bombardment of both a metallic (Cu) and a van-der-Waals bonded
	(frozen Ar) target. Clusters with sizes up to N = 104 atoms and with
	energies per atom of E/N = 0.1–1600 eV atom−1 were studied. We
	find that the stopping force exerted on a cluster follows an N2/3-dependence
	with cluster size N; thus large clusters experience less stopping
	than equi-velocity atoms. In the course of being stopped, the cluster
	is strongly deformed and attains a roughly pancake shape. Due to
	the cluster inertia, maximum deformation occurs later than the maximum
	stopping force. The time scale of projectile stopping is set by t0,
	the time the cluster needs to cover its own diameter before impacting
	the target; it thus depends on both cluster size and velocity. The
	time when the cluster experiences its maximum stopping force is around
	(0.7–0.8)t0. We find that the cluster is deformed with huge strain
	rates of around 1/2t0; this amounts to 1011–1013 s-1 for the cases
	studied here.},
  doi      = {10.1088/1367-2630/13/11/113019},
  url      = {http://iopscience.iop.org/article/10.1088/1367-2630/13/11/113019/pdf},
}

@Article{DesorptionOfGold:2009,
  author    = {Christian Anders and Herbert M. Urbassek and Gerolf Ziegenhain and S. Delle-Negra and M. Fallavier and A. Novikov and V. Domaratsky and V. Obnorsky and S. Yarmiychuk and K. Wien},
  title     = {{Desorption of gold from gold nanodispersed targets by 200keV Au_5 polyatomic ions in the elastic stopping mode: Experiments and MD}},
  journal   = {Nuclear Inst. and Methods in Physics Research, B},
  year      = {2009},
  volume    = {267},
  number    = {15},
  pages     = {2503},
  abstract  = {Au nanoislet targets (2?60 nm) were bombarded by 200 keV polyatomic
	ions (40 keV/atom), which deposit their energy mainly in the nuclear
	stopping mode: $\Sigma(dE/dx)_n$ = 30 keV/nm and $\Sigma(dE/dx)_e$
	= 2 keV/nm. The matter desorbed in the form of nanoclusters was registered
	by TEM. The total transfer of matter was determined by neutron-activation
	analysis. The total yield of the ejected gold reached high values
	of up to $2.6x10^4$ atoms per Au5 ion. The major part ($2x10^4$ atoms
	per ion Au5) of the emission is in the form of nanoclusters. The
	results are compared with the data of similar experiments with 1
	MeV Au5 (200 keV/atom) and other projectiles. The analysis of the
	experimental data and the comparison to molecular-dynamics simulation
	results of the desorption process show that the desorption of Au
	nanoislets is induced by their melting, build-up of pressure and
	thermal expansion.},
  doi       = {10.1016/j.nimb.2009.05.010},
  timestamp = {2009.01.19},
  url       = {http://dx.doi.org/10.1016/j.nimb.2009.05.010},
}

@Article{CraterFormationByNanoparticleImpact:2012,
  author  = {Christian Anders and Gerolf Ziegenhain and Carlos J. Ruestes and Eduardo M. Bringa and Herbert M. Urbassek},
  title   = {{Crater formation by nanoparticle impact: Contributions of gas, melt and plastic flow}},
  journal = {New J. Phys.},
  year    = {2012},
  volume  = {14},
  pages   = {083016},
  doi     = {10.1088/1367-2630/14/8/083016},
  url     = {http://iopscience.iop.org/article/10.1088/1367-2630/14/8/083016/pdf},
}

@Article{ClusterInducedCraterFormation,
  author    = {Christian Anders and Gerolf Ziegenhain and Steffen Zimmermann and Herbert M. Urbassek},
  title     = {{Cluster-induced crater formation}},
  journal   = {Nuclear Instruments and Methods in Physics Research Section B},
  year      = {2009},
  volume    = {267},
  number    = {18},
  pages     = {3122--3125},
  abstract  = {Using molecular-dynamics simulation, we study the crater volumes induced
	by energetic impacts (v= 1- 250 km/s) of projectiles containing up
	to N=1000 atoms. We find that for Lennard-Jones bonded material the
	crater volume depends solely on the total impact energy E. Above
	a threshold E_{th}, the volume rises linearly with E. Similar results
	are obtained for metallic materials. By scaling the impact energy
	E to the target cohesive energy U, the crater volumes become independent
	of the target material. To a first approximation, the crater volume
	increases in proportion with the available scaled energy, V=aE/U.
	The proportionality factor a is termed the cratering efficiency and
	assumes values of around 0.5.},
  doi       = {10.1016/j.nimb.2009.07.002},
  preprint  = {http://arxiv.org/abs/0810.4242},
  timestamp = {2009.01.19},
  url       = {http://dx.doi.org/10.1016/j.nimb.2009.07.002},
}

@Book{VogelsbergerVogelsbergerVogelsberger:2005,
  title     = {{Thermodynamik und Statistische Mechanik}},
  publisher = {None},
  year      = {2005},
  author    = {Mark Vogelsberger and Roland Neb and Oliver Ottinger and Gerolf Ziegenhain and Carsten Handel and Kai Keller and Christian Bogner},
  owner     = {gerolf},
  timestamp = {2009.04.18},
  url       = {http://g.ziegenhain.com/doc/theo_TD.pdf},
}

@Article{Ziegenhain2013,
  author    = {Gerolf Ziegenhain},
  title     = {{WSPR-Bake zur Untersuchung von Ausbreitungsbedingungen}},
  journal   = {Funkamateur},
  year      = {2013},
  volume    = {09},
  pages     = {956},
  note      = {WSPR},
  owner     = {g},
  timestamp = {2013.08.03},
}

@BOOK{Ziegenhain:2010,
  title = {Atomistische Simulation von Nanoindentation},
  publisher = {ISBN: 978-3-8381-1779-9, Südwestdeutscher Verlag für Hochschulschriften},
  year = {2010},
  author = {Gerolf Ziegenhain},
  pages = {208},
  address = {Dudweiler Landstraße 99, D-66123 Saarbrücken, Germany},
  isbn = {978-3-8381-1779-9},
  owner = {gerolf},
  timestamp = {2010.06.16}
}

@PhdThesis{ZiegenhainThesis:2009,
  author    = {Gerolf Ziegenhain},
  title     = {Atomistische Simulation von Nanoindentation},
  school    = {TU Kaiserslautern},
  year      = {2009},
  address   = {Kaiserslautern},
  month     = {06},
  abstract  = {In the present work nanoindentation of the FCC-metals aluminium and
	copper has been investigated using atomistic simulations. The following
	topics have been covered: The effect of crystalline anisotropy on
	the Hertzian approximation, the influence of the interatomic potential
	on plastic deformation, structured surfaces, and the phenomenon of
	reversible plasticity. The simulations have been carried out on cubic
	substrates with a side length of about 25 nm using a rigid, spherical
	indenter with a radius of about 8 nm and an indentation velocity
	of about 10 m/s.
	
	The influence of the crystalline anisotropy of the (100), (110) and
	(111) surfaces has been investigated for copper and aluminium. The
	Hertzian solution is valid on the atomistic scale in the linear elastic
	regime with an orientation dependent reduced elastic modulus, which
	can be derived from the elastic constants of the potential. In the
	plastic regime, the influence of the orientation drops with increasing
	indentation depth and the hardness becomes independent on the orientation.
	This investigation validates the application of the Hertzian theory
	to nanocrystalline materials.
	
	It has been shown that despite deviations in the stable stacking fault
	energy simple pair potentials are capable of qualitatively modelling
	the elastic deformation, the critical indentation depth including
	the appropriate critical stress, the level of hardness, and actually
	the primary plasticity for ideal free surfaces. In the deep plastic
	regime, however, the simple pair potentials lead to an overestimation
	of the stacking fault size, which causes work-hardening. This indicates
	that pair potentials may be used under specific circumstances for
	meaningful parametric studies.
	
	The influence of the elastic stiffness on hardness has been investigated
	in a parametric study using a Morse potential. It has been shown
	that the crystalline hardness and the load-drop scale with the elastic
	stiffness, whereas the critical indentation depth is independent
	on the elastic stiffness. The proportionality of hardness to the
	theoretical strength could be confirmed.
	
	For a surface with an island of adatoms, the influence of the surface
	structure has been investigated. Below a specific size the island
	is pushed into the substrate and transported away from the indenter
	in form of prismatic loops; the results are independent on the primary
	structure on the surface.
	
	The phenomenon of reversible plasticity has been found for ideal (111)
	surfaces. The responsible mechanism has been identified as the cross-slip.
	After the onset of material transport the plastic deformation becomes
	irreversible and corresponds to the definition of the continuum theory.
	This finding is important, as it shows that the force-depth curve
	does not provide information on the plastic deformation. A criterion
	for the onset of irreversible plasticity based on the total strain
	is given.},
  comment   = {http://d-nb.info/995708398 http://d-nb.info/1002491576/34},
  owner     = {gerolf},
  timestamp = {2009.06.29},
  url       = {http://g.ziegenhain.com/doc/thesis.pdf},
}

@TechReport{Ziegenhain:2007,
  author      = {Gerolf Ziegenhain},
  title       = {Structural Properties of Binary Repulsive Systems in Two Dimensions},
  institution = {Johannes Gutenberg University},
  year        = {2007},
  type        = {techreport},
  number      = {1},
  address     = {Mainz},
  month       = {08},
  owner       = {gerolf},
  timestamp   = {2011.02.03},
  url         = {http://g.ziegenhain.com/doc/TechRepLM.pdf},
}

@MASTERSTHESIS{ZiegenhainZiegenhainZiegenhain:2006,
  author = {Gerolf Ziegenhain},
  title = {{Test der Modenkopplungstheorie in zwei Dimensionen}},
  school = {Johannes Gutenberg-Universität Mainz},
  year = {2006},
  abstract = {In the present work the validity of the mode-coupling theory in two
	dimensions is extended to the systems of monodisperse and binary
	(dipolar) hard spheres. The main results of this thesis are a fast
	and stable algorithm for solving the equations (PY/OZ) for the static
	structure factors in two dimensions. Furthermore the glass-transition
	of the systems mentioned above is discussed.},
  owner = {gerolf},
  timestamp = {2009.04.18},
  url = {http://g.ziegenhain.com/doc/diplomarbeit.pdf}
}

@Article{InfluenceOfCrystalAnisotropyOnTheOnsetOfPlasticityInNanoindentationAMolecularDynamicsStudy,
  author    = {Gerolf Ziegenhain and Alexander Hartmaier and Herbert M. Urbassek},
  title     = {{Influence of Crystal Anisotropy on the Onset of Plasticity in Nanoindentation - a Molecular Dynamics Study}},
  journal   = {J. Appl. Phys.},
  year      = {2010},
  volume    = {107},
  pages     = {061807},
  abstract  = {Using molecular-dynamics simulation we simulate nanoindentation into
	the three principal surfaces -- the (100), (110) and (111) surface
	-- of Cu and Al. In the elastic regime, the simulation data agree
	fairly well with the linear elastic theory of indentation into an
	elastically anisotropic substrate. With increasing indentation, the
	effect of pressure hardening becomes visible. When the critical stress
	for dislocation nucleation is reached, even the elastically isotropic
	Al shows a strong dependence of the surface orientation on the force-displacement
	curves. After the load drop, when plasticity has set in, the influence
	of the surface orientation is lost, and the contact pressure (hardness)
	becomes independent of the surface orientation.},
  doi       = {10.1063/1.3340523},
  owner     = {gerolf},
  preprint  = {http://arxiv.org/abs/0812.1717},
  timestamp = {2009.01.19},
  url       = {http://dx.doi.org/10.1063/1.3340523},
}

@Article{PairVsManyBodyPotentials_InfluenceOnElasticAndPlasticBehaviorInNanoindentation,
  author   = {Gerolf Ziegenhain and Alexander Hartmaier and Herbert M. Urbassek},
  title    = {{Pair vs many-body potentials: influence on elastic and plastic behavior in nanoindentation}},
  journal  = {Journal of the Mechanics and Physics of Solids},
  year     = {2009},
  volume   = {57},
  pages    = {1514 -- 1526},
  abstract = {Molecular-dynamics simulation can give atomistic information on the
	processes occurring in nanoindentation experiments. In particular,
	the nucleation of dislocation loops, their growth, interaction and
	motion can be studied. We investigate how realistic the interatomic
	potentials underlying the simulations have to be in order to describe
	these complex processes. Specifically we investigate nanoindentation
	into a Cu single crystal. We compare simulations based on a realistic
	many-body interaction potential of the embedded-atom-method type
	with two simple pair potentials, a Lennard-Jones and a Morse potential.
	We find that qualitatively many aspects of nanoindentation are fairly
	well reproduced by the simple pair potentials: elastic regime, critical
	stress and indentation depth for yielding, dependence on the crystal
	orientation, and even the level of the hardness. The quantitative
	deficits of the pair potential predictions can be traced back (i)
	to the fact that the pair potentials are unable in principle to model
	the elastic anisotropy of cubic crystals; (ii) as the major drawback
	of pair potentials we identify the gross underestimation of the stable
	stacking fault energy. As a consequence these potentials predict
	the formation of too large dislocation loops, the too rapid expansion
	of partials, too little cross slip and in consequence a severe overestimation
	of work hardening.},
  doi      = {10.1016/j.jmps.2009.05.011},
  owner    = {gerolf},
  preprint = {http://arxiv.org/abs/0810.1713},
  url      = {http://dx.doi.org/10.1016/j.jmps.2009.05.011},
}

@InProceedings{ZiegenhainHartmaierUrbassek:2008b,
  author       = {Gerolf Ziegenhain and Alexander Hartmaier and Herbert M. Urbassek},
  title        = {{Onset of Plasticity Under Nanoindentation Influence of the Interatomic Potential}},
  booktitle    = {The Fourth International Conference on Multiscale Materials Modeling},
  year         = {2008},
  pages        = {{}},
  address      = {Tallahassee, FL, USA},
  month        = {27.10},
  organization = {October 27-31},
  abstract     = {In recent years the computer power has become large enough to solve
	Newton's equations of motion for a large number of particles numerically.
	This enables us to simulate the plastic behavior of materials on
	the atomistic scale. Using the molecular dynamics method we investigate
	specifically the onset of plasticity under nanoindentation.
	
	In order to understand the atomistic plasticity and ductility of metals
	we address the question which microscopic properties are of importance
	for modelling plastic behavior. The microscopic properties - such
	as the cohesive energy, the elastic moduli, and the energy of point,
	line and planar defects - are determined through the potentials.
	
	Focussing on fcc materials, we investigate different pair and many-body
	potentials with respect to plasticity. It turns out that the dislocation
	nucleation under the indenter does not depend on the unstable stacking
	fault energy, which however governs the behavior of fully developped
	plasticity. Embryonic plasticity is dominated by crystal structure
	alone; it is well described even by simple pair potential.},
  owner        = {gerolf},
  timestamp    = {2008.11.13},
  url          = {http://www.mmm2008.org},
}

@Article{NanoindentationIntoStructuredSurfacesDependencyOnTheStructureSize,
  author    = {Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Nano-structured surfaces yield earlier: a molecular-dynamics study of nanoindentation into adatom islands}},
  journal   = {Physical Review B},
  year      = {2010},
  volume    = {81},
  pages     = {155456},
  month     = {03},
  doi       = {10.1103/PhysRevB.81.155456},
  owner     = {gerolf},
  timestamp = {2009.01.19},
  url       = {http://dx.doi.org/10.1103/PhysRevB.81.155456},
}

@Article{EffectOfMaterialStiffnessOnHardness_AComputationalStudyBasedOnModelPotentials,
  author    = {Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Effect of material stiffness on hardness: a computational study based on model potentials}},
  journal   = {Philosophical Magazine},
  year      = {2009},
  volume    = {89},
  number    = {26},
  pages     = {2225--2238},
  abstract  = {We investigate the dependence of the hardness of materials on their
	elastic stiffness. This is possible by constructing a series of model
	potentials of Morse type; starting with modelling natural Cu, the
	model potentials exhibit an increased elastic modulus, while keeping
	all other potential parameters (lattice constant, bond energy) unchanged.
	Using moleculardynamics simulation, we perform nanoindentation experiments
	on these model crystals. We find that the crystal hardness scales
	with the elastic stiffness. Also the load drop, which is experienced
	when plasticity sets in, increases in proportion to the elastic stiffness,
	while the yield point, i.e. the indentation at which plasticity sets
	in, is independent of the elastic stiffness.},
  doi       = {10.1080/14786430903022697},
  owner     = {gerolf},
  preprint  = {http://arxiv.org/abs/0808.1159v1},
  timestamp = {2009.01.14},
  url       = {http://dx.doi.org/10.1080/14786430903022697},
}

@Article{ReversiblePlasticityInFccMetals,
  author    = {Gerolf Ziegenhain and Herbert M. Urbassek},
  title     = {{Reversible Plasticity in fcc metals}},
  journal   = {Philosophical Magazine Letters},
  year      = {2009},
  volume    = {89},
  number    = {11},
  pages     = {717--723},
  month     = {01},
  abstract  = {Using atomistic simulation, the indentation of single-crystalline
	Cu is investigated for both an ideal and a stepped (111) surface.
	Both systems exhibit an intermediate regime of reversible plasticity,
	characterized by the formation of extended stacking faults, which
	heal entirely upon withdrawal of the indenter. This regime can be
	employed to clarify the role of pure stacking fault generation and
	cross-slip in plasticity. Its existence reveals that, on the atomistic
	scale, plastic deformation is characterized by material transport
	rather than by the nucleation of stacking faults. Finally, we establish
	a criterion - based on the total displacement of particles - to determine
	after which indentation depth plasticity is generated irreversibly
	in the material.},
  doi       = {10.1080/09500830903272900},
  owner     = {gerolf},
  timestamp = {2009.01.19},
  url       = {http://dx.doi.org/10.1080/09500830903272900},
}