@article{HaissigDoerenWilmes1981,
  author    = {Haissig, Manfred and D{\"o}ren, Horst-Peter and Wilmes, S.},
  title     = {Stand der Entwicklung des Horizontal-Stranggießens von Edelstahl bei der B{\"o}hler AG},
  series = {Stahl und Eisen. Zeitschrift f{\"u}r die Herstellung und Verarbeitung von Eisen und Stahl. Hrsg.: Verein Deutscher Eisenh{\"u}ttenleute (VDEh) ; Wirtschaftsvereinigung Stahl. 101 (1981), H. 6},
  journal   = {Stahl und Eisen. Zeitschrift f{\"u}r die Herstellung und Verarbeitung von Eisen und Stahl. Hrsg.: Verein Deutscher Eisenh{\"u}ttenleute (VDEh) ; Wirtschaftsvereinigung Stahl. 101 (1981), H. 6},
  issn      = {0340-4803},
  pages     = {383 -- 390},
  year      = {1981},
  language  = {de}
}
@inproceedings{HandschuhStollenwerkBorchert2021,
  author    = {Handschuh, Nils and Stollenwerk, Dominik and Borchert, J{\"o}rg},
  title     = {Operation of thermal storage power plants under high renewable grid penetration},
  series = {NEIS 2021: Conference on Sustainable Energy Supply and Energy Storage Systems},
  booktitle = {NEIS 2021: Conference on Sustainable Energy Supply and Energy Storage Systems},
  publisher = {VDE Verlag},
  address   = {Berlin},
  isbn      = {978-3-8007-5651-3},
  pages     = {261 -- 265},
  year      = {2021},
  abstract  = {The planned coal phase-out in Germany by 2038 will lead to the dismantling of power plants with a total capacity of approx. 30 GW. A possible further use of these assets is the conversion of the power plants to thermal storage power plants; the use of these power plants on the day-ahead market is considerably limited by their technical parameters. In this paper, the influence of the technical boundary conditions on the operating times of these storage facilities is presented. For this purpose, the storage power plants were described as an MILP problem and two price curves, one from 2015 with a relatively low renewable penetration (33 \%) and one from 2020 with a high renewable energy penetration (51 \%) are compared. The operating times were examined as a function of the technical parameters and the critical influencing factors were investigated. The thermal storage power plant operation duration and the energy shifted with the price curve of 2020 increases by more than 25 \% compared to 2015.},
  language  = {en}
}
@book{Hardt1974,
  author    = {Hardt, Arno},
  title     = {Das Transportsystem BANDIT zur Messung von Halbwertszeiten kurzlebiger, neutronenarmer Isotope},
  publisher = {Univ.},
  address   = {Bonn},
  pages     = {59 S.},
  year      = {1974},
  language  = {de}
}
@book{Hardt1985,
  author    = {Hardt, Arno},
  title     = {Vermessung der dynamischen Eigenschaften eines dreiachsigen Koordinatenmesstisches},
  publisher = {Kernforschungsanlage J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {107 S.},
  year      = {1985},
  language  = {de}
}
@inproceedings{HardtAbdelGawadMartinetal.1975,
  author    = {Hardt, Arno and Abdel-Gawad, A and Martin, S. and Reich, J.},
  title     = {Design procedures for the Juelich QQDDQ high resolution spectrometer},
  series = {Proceedings, 5th International Conference on Magnet Technology (MT-5) : Rome, Italy, April 21-25, 1975},
  booktitle = {Proceedings, 5th International Conference on Magnet Technology (MT-5) : Rome, Italy, April 21-25, 1975},
  pages     = {45 -- 51},
  year      = {1975},
  language  = {en}
}
@article{HardtBisplinghoffErnstetal.1977,
  author    = {Hardt, Arno and Bisplinghoff, J. and Ernst, J. and L{\"o}hr, R.},
  title     = {On-line apparatus BANDIT for half-life determination of short-lived neutron deficient isotopes. A. Hardt, J. Bisplinghoff, J. Ernst, R. L{\"o}hr, H. Machner, T . Mayer-Kuckuk},
  series = {Nuclear Instruments and Methods. 143 (1977), H. 3},
  journal   = {Nuclear Instruments and Methods. 143 (1977), H. 3},
  isbn      = {0029-554X},
  pages     = {519 -- 523},
  year      = {1977},
  language  = {en}
}
@article{HardtKoehlerMuelleretal.1980,
  author    = {Hardt, Arno and K{\"o}hler, M. and M{\"u}ller, K. D. and Stoff, H.},
  title     = {A two-dimensional position sensitive charged-particle detector for the magnetic spectrograph "BIG KARL" of the J{\"u}lich Cyclotron "JULIC". M. K{\"o}hler, K. D. M{\"u}ller, H. Stoff, M. Teske, G. P. A. Berg, A. Hardt, S. Martin, C. Mayer-B{\"o}ricke , J. Meißburger},
  series = {Nuclear Instruments and Methods. 75 (1980), H. 2-3},
  journal   = {Nuclear Instruments and Methods. 75 (1980), H. 2-3},
  isbn      = {0029-554X},
  pages     = {357 -- 362},
  year      = {1980},
  language  = {en}
}
@article{HardtMartinMeissburgeretal.1978,
  author    = {Hardt, Arno and Martin, S. and Meißburger, J. and Retz, R. and Wimmer, J.},
  title     = {The cryopump system of the QQDDQ magnet spectrometer BIG KARL},
  series = {Vacuum},
  volume    = {28},
  journal   = {Vacuum},
  number    = {10-11},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1879-2715 (E-Journal); 0042-207X (Print)},
  doi       = {10.1016/S0042-207X(78)80026-8},
  pages     = {483},
  year      = {1978},
  abstract  = {Cryopumps without liquid nitrogen shielding are used to provide a vacuum of 10-6 torr in the spectrometer. The vacuum system is subdivided in three sections that can be separated by valves. The first section (scattering chamber) has a volume of 60 l, two rotation transmissions with 35 cm dia and a sliding seal that allows a rotation of 160° without deteriorating the vacuum. The second section includes the vacuum chambers inside the magnets with 6 × 80 cm cross-section and a length of 1200 cm. The third section (detector box) has a volume of 4300 l and contains a moveable detector system. The gas inside the detector with a pressure of 760 torr is separated from the vacuum by a 15 μm mylar foil with an area of 300 cm2. The detector box can be valved off by a valve with the dimension of 10 × 100 cm. The layout of system is given. The instrumentation and the interlock system are described. First experiences with this system are presented.},
  language  = {en}
}
@book{HardtMuellerBergetal.1980,
  author    = {Hardt, Arno and M{\"u}ller, Gerhard and Berg, G. P. and Kelleter, H.-J.},
  title     = {Aufbau eines Plastikszintillationsz{\"a}hlers f{\"u}r den Magnetspektrographen "BIG KARL" am J{\"u}licher Zyklotron "JULIC". M{\"u}ller, Gerhard; Berg , G. P.; Hardt, A.; Kelleter, H.-J.; Martin, S.-A.; Meissburger, J.},
  publisher = {Kernforschungsanlage J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {37 S.},
  year      = {1980},
  language  = {de}
}
@book{HardtSchiffer1985,
  author    = {Hardt, Arno and Schiffer, Willi},
  title     = {Vermessung der statischen Eigenschaften eines dreidimensionalen Koordinatenmeßtisches / von W. Schiffer ; A. Hardt. [KFA, Kernforschungsanlage J{\"u}lich GmbH, Projekt Spallations-Neutronenquelle]},
  publisher = {Zentralbibliothek d. Kernforschungsanlage},
  address   = {J{\"u}lich},
  pages     = {65 S. : graph. Darst.},
  year      = {1985},
  language  = {de}
}