Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Helmut Hermann"'
Autor:
Helmut Hermann, Antje Elsner
Publikováno v:
Advances in Materials Science and Engineering, Vol 2014 (2014)
Models for random porous media are considered. The models are isotropic both from the local and the macroscopic point of view; that is, the pores have spherical shape or their surface shows piecewise spherical curvature, and there is no macroscopic g
Externí odkaz:
https://doaj.org/article/0598f932d2e049f7ba06f92d857cf2b4
Publikováno v:
Journal of Porous Media 22(2019)4, 387-394
The cherry-pit or penetrable concentric-shell model is an important, very successful stochastic model for random porous media with open pores. It is based on a random system of hard spheres (the ‘pits’), which are dilated in order to get open por
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c104363100d3d46919dc1ed1839385d2
https://doi.org/10.1615/jpormedia.2019029040
https://doi.org/10.1615/jpormedia.2019029040
Autor:
Pongratz, Helmut Hermann
Die Tumorausdehnung und das Vorliegen regionärer Lymphknotenmetastasen in Form der pT- und pN-Kategorie der TNM-Klassifikation sind unumstrittene Prognosefaktoren bei Patienten mit Plattenepithelkarzinomen des Kopf-Hals-Bereiches. Der Einfluss der I
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A70653
https://ul.qucosa.de/api/qucosa%3A70653/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A70653/attachment/ATT-0/
Publikováno v:
Journal of Applied Crystallography. 47:1906-1911
Samples of Cu47.5Zr47.5Al5metallic glass were prepared at different cooling rate,R. The dependence of the X-ray diffraction patterns onRwas analysed by comparing them with corresponding patterns of computer-simulated models generated at different coo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c060e64d428fafe95f53d2232c0553a
https://doi.org/10.1107/s1600576714021232
https://doi.org/10.1107/s1600576714021232
Publikováno v:
Intermetallics. 30:40-47
Expressions for the effective elastic constants and the effective thermal conductivity of nanocomposite materials are derived. The considered systems are described as a matrix with embedded nanometre scale particles. The peculiarity of the nanoscale
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f25cfb9aa0d7ffa15f528b0f060ee48
https://doi.org/10.1016/j.intermet.2012.03.042
https://doi.org/10.1016/j.intermet.2012.03.042
Publikováno v:
Journal of Non-Crystalline Solids. 357:1508-1515
An improved statistical characterization of disordered structures such as metallic glasses, random porous media, or granular matter is presented. Suitable structure models follow the idea of dense random packed spheres, where the spheres represent at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::011332dc38989ef795c96b6d06e69f9f
https://doi.org/10.1016/j.jnoncrysol.2010.12.033
https://doi.org/10.1016/j.jnoncrysol.2010.12.033
Autor:
Horst Wendrock, Helmut Ehrenberg, Helmut Hermann, Olga Khvostikova, Jürgen Thomas, Thomas Gemming
Publikováno v:
Journal of Materials Science. 46:2422-2430
The process of the preparation of graphitic nanoplatelets via chemical intercalation and thermal exfoliation of graphite was considered. The dependence of the properties of the final product on the microstructure of the raw material and on different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3367d4e25dc45b1614866becea6b5236
https://doi.org/10.1007/s10853-010-5088-x
https://doi.org/10.1007/s10853-010-5088-x
Autor:
Gotthard Seifert, O. Khvostikova, Helmut Hermann, Bassem Assfour, Alexander Horst, Helmut Ehrenberg
Publikováno v:
International Journal of Hydrogen Energy. 35:11042-11051
Novel experimental procedures for hydrogen adsorption studies are presented. The methods provide an important advantage: pure material sorption behaviour can be directly determined without the use of equations of state (EOS) at low temperatures. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f91a9c63786b2bb6914f7e6e7ccc6a1
https://doi.org/10.1016/j.ijhydene.2010.07.089
https://doi.org/10.1016/j.ijhydene.2010.07.089
Publikováno v:
Journal of Non-Crystalline Solids. 353:3693-3697
The model of densely packed hard spheres is used as a first-order approach to the structure of liquid metals and liquid metallic alloys. The concept of local packing fraction is applied to characterize the local structure. Starting from dilute system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad631abe606b4ae60d1215d9ee52d7ce
https://doi.org/10.1016/j.jnoncrysol.2007.05.133
https://doi.org/10.1016/j.jnoncrysol.2007.05.133