Welcome to the Open Access Repository of the Physikalisch-Technische Bundesanstalt (PTB-OAR)

PTB is the national metrology institute of the Federal Republic of Germany.

This database grants free access to a number of documents and factual datasets that were elaborated at PTB. This includes publications such as the "PTB-Mitteilungen", the metrological expert journal of PTB, and numerous of documents from the field of legal metrology.

Please use the search function or the category selection on the right-hand side to find the publications you are looking for.

When downloading the publications, please take the license conditions for further use into account.

All Resources

Additional data for the publication "Improved Limits for Violations of Local Position Invariance from Atomic Clock Comparisons" (2021); Lange, Richard; Huntemann, Nils; Rahm, Johannes M.; Sanner, Christian; Shao, Hu; et al. DOI: 10.7795/720.20211028
Alpha-Synuclein in Parkinson’s Disease, Spreading of injected alpha-synuclein fibrils to and within cerebella of a transgenic PD mouse model (2021); Su, Elena; DOI: 10.7795/320.202107
The TILSAM method adapted into Optical Gas Standards - complementing gaseous reference materials (2021); Werhahn, Olav; Petersen, Jan C.; Nwaboh, Javis; Pogány, Andrea; Qu, Zhechao; DOI: 10.7795/EMPIR.16ENG05.CA.20211013
The thorium-229 low-energy isomer and the nuclear clock (2021); Beeks, Kjeld; Sikorsky, Tomas; Schumm, Thorsten; Thielking, Johannes; Okhapkin, Maxim V.; et al. DOI: 10.7795/120.20211006
Additional data for the publication "The blackbody radiation shift in strontium lattice clocks revisited" (2021); Lisdat, Christian; Dörscher, Sören; Nosske, Ingo; Sterr, Uwe; DOI: 10.7795/720.20210928
Measurement and simulation data for "Identification of aliasing effects in measurements of unknown MTFs" (2021); Schake, Markus; Schulz, Michael; DOI: 10.7795/710.20210915
To get to the point, Neural Network application to key-point detection in radiographs (2021); Schott, Constantin Tilman; DOI: 10.7795/320.202106
Höhle mit Geheimnissen, Karstgewässeruntersuchung in der Križna Jama mittels selbst entwickelter Methoden (2021); Kausch, Leon; Grumann, Moritz; Nitsche, Leon; DOI: 10.7795/320.202105
Die Erfassung von Beobachtungsdaten anhand der Erdmagnetfeldmessung in der PTB und Aspekte von Systemstandards, Sicherheit, Nachhaltigkeit und Qualitätssicherung (2021); Harcken, Hans; DOI: 10.7795/130.20210901
Final report on the project Volume Determination in the Microlitre Range (2021); Wolf, Henning; DOI: 10.7795/110.20210906
Nationaler DKD-Ringvergleich an einer Kugelplatte 620 mm x 620 mm : Vergleichsbericht DKD-V 4-4 (2021); Kniel, Karin; Hirsch, Jürgen; Bartscher, Markus; DOI: 10.7795/550.20210820
Ermittelte Regeln und Erkenntnisse des Regelermittlungsausschusses nach § 46 des Mess- und Eichgesetzes, Stand: 22. März 2021 (2021); Regelermittlungsausschuss bei der Physikalisch-Technischen Bundesanstalt (PTB), Braunschweig; DOI: 10.7795/510.20210714
Sound intensity and sound pressure values after measurements in various surrounding environments. (2021); Brezas, Spyros; Wittstock, Volker; Heisterkamp, Fabian; DOI: 10.7795/20210723
Puls-Elektrometer-Verstärker zur parallelen Messung von Strom und Ladung (2021); Buchholz, Gerd; DOI: 10.7795/130.20210610
Specifications and testing strategies for measurement devices for noise exposure determination in the infrasound frequency range (2021); Kling, Christoph; Koch, Christian; Rust, Marvin; Barham, Richard; Rodrigues, Dominique; et al. DOI: 10.7795/EMPIR.19ENV03.RE.20210609