Experimental data corresponding to the manuscript "Chemical Interface Damping by Electrochemical Gold Oxidation". The dataset contains ellipsometric measurements and fits together with electrochemical potential and current curves that indicate the chemical itnerface damping effect originating from electrochemical oxidation of gold samples.

This artefact provides data and a detailed description of a wave flume experiment with and without an artifical Gaussian-shaped bathymetry. Provided a wave height measurements at four sensor points over time. Included in this data set are (1) the data itself in TXT format, (2) a video showing the waves in the flume in MP4 format and (3) a description of the experimental setup in PDF format.

Understanding how various ice shapes affect loads experienced by a ship hull or structure is crucial. Therefore, ice-structure interaction with a focus on the shape of the impacting ice was investigated. In the study drop tower experiments were conducted at the Institute of Ship Structural Design and Analysis of the Hamburg University of Technology to investigate ice impacts on a small scale. Ice specimens with diverse shapes (cylinder, cone, dome, wedge, ellipse, and other variations) were subjected to single impacts against a steel plate. Analysis revealed two main failure modes based on ice geometry, showcasing significant differences in load magnitude. Correlations between contact area, cone angle, specimen length to peak force, pressure, and energy were observed. The experimental setup, test matrix including the dimensions of the tested ice shapes and the data analysis are soon to be published. The experimental data are provided here. The data include the summed up force signal of the load cells and the displacement signal of the drop hammer. The data have been cropped to focus on the relevant portion around the impact load peak. Each file contains a single test run encompassing the time signal in seconds, force signal in kilo Newtons, and displacement signal in millimeters.

The datasets included in this work focus on the study of the imbibition dynamics of water in nanoporous Vycor glass. Specifically, this refers to the filling dynamics of water, driven by capillary forces, into a hydrophilic nanoporous Vycor glass sample (porous silica glass). The samples (2) used in these experiments are cylindrical monoliths. Both are identical (mean pore size , porosity), differing only in length. The experiments were designed to study capillary rise dynamics. Since Vycor glass is translucent, this can be directly observed by tracking the filling front via changes in the transparency of the samples (optical experiments). It can also be indirectly monitored by measuring properties of the sample that change proportionally to the filling front length. For this, we performed mass uptake experiments, measuring the changes in the mass of the sample during filling. We also used a high-precision dilatometer to measure changes in the length of the sample (strain) during imbibition (dilatometry).

The dataset presented here belong to an electrochemical impedance spectroscopy (EIS) study of mesoporous silicon in aqueous electrolyte solution (perchloric acid). The dataset contains EIS measurements performed at various static applied potentials so that a Mott-Schottky analysis of the electrode can be performed. Moreover, the dataset has an EIS study on a bulk silicon electrode, synthesized under equal conditions as the porous silicon electrode, so that a direect comparison between the two electrode types is possible.

Appendix containing experimental data

The dataset contains the experimental data analyzed in the creators' article titled "Bilateral communication in procurement auctions".

This extensive dataset contains the results of 175 triaxial tests on dense cemented sand samples with measurements of a height of 72 mm and a diameter of 36 mm. The sands used include Hamburg Sand (HH), known for its coarser grain size, and Cuxhaven Sand (CX), which has a finer grain size as also shown in Figure 2. The cement paste consists of Dyckerhoff MIKRODUR R-U Mikrozement and water. The tests were conducted to analyze the mechanical properties of cemented Hamburg sand and cemented Cuxhaven sand under various conditions, specifically focusing on the effects of confining pressure and cementation degree, as shown in Table 1. The sample preparation involved layering and compacting the sand-cement-water mixture in Plexiglas molds, followed by a curing process with initial sealing and subsequent water immersion for 28 days.

As part of the FAUST project, both field and laboratory investigations were conducted on the sediment exchange behavior of cohesive sediments in the Weser estuary. A particular focus of the work was the examination of vertical exchange processes at the interface between the water column and highly concentrated suspensions. Since the transitions between the sub-processes of sediment exchange are partially fluid or directly connected, investigations were carried out not only on the predominant aspects of settling and erosion behavior but also on consolidation behavior and rheology of cohesive sediments. The methodology to generate the density profiles is described in the corresponding publication, where the results were published and discussed first hand (https://doi.org/10.3389/feart.2022.916056). In general, an Anton Paar DMA Standard Densimeter has been used to measure the suspensions densities. For very high (approx. >1300 kg/m³) densities a suspension balance has been used as alternative. Lutocline evolution curves are generated by digitization of photographic observations of the lutoclines evolution over time. Information on the composition (approximate fractions of sand, silt and clay) of the sediments used is also given in https://doi.org/10.3389/feart.2022.916056. Data abbreviations are location based: BB - Blexer Bogen, NH - Nordenham, H - Harbour, S - Ship, L - Laboratory, MW - Measurementtrip Weser; Numbers are sample and field trip specific. Natural profiles: e.g. MW-II, NH-13H: Sample number 3 from the second field trip (first 0, second 1,...) on the Weser (MW-II) collected at Position Nordenham. Density profile generated immediately after returning in the harbour (H). Lab generated development of density-depth-profiles: e.g. BB-05 rho_0 = 1065 kg/m³: Sample number 5 from the first field trip on the Weser collected at Position Blexer Bogen having an initially homogeneous density profile of rho_0 = 1065 kg/m³

The data set was collected within the context of the research project ELMOD - “Simulation and analysis of the hydrological and morphological development of the Tidal Elbe for the period from 2013 to 2018”. The aim was to: i) obtain information on the settling and consolidation behavior of the site-specific coehsive sediment and ii) create a data set for the calibration of numerical models. The dataset consists of time-dependent density profiles of six cohesive sediment samples, collected in the Elbe estuary in the area of the Port of Hamburg. The sediment of three samples each was collected on the "Suederelbe" (SE) and the "Norderelbe" (NE). The exact sampling positions are shown in Figure 1 in the following related publication: https://doi.org/10.3389/fmars.2024.1386081. The grain size distributions (GSD) of the sediment samples are included in the dataset. The sediment samples were diluted in the laboratory to densities between 1035 kg/m³ and 1080 kg/m³. The samples were thoroughly homogenized in a 20 cm diameter settling column, by mixing the suspension for 10 minutes with a stirring machine. After 15 minutes of settling the first density profile was taken. For this purpose, a small amount of suspension (~5 ml) was extracted from defined heights in the settling column (every 5 cm). This procedure was performed by inserting thin alloy tubes from the top of the suspension and aspirating the suspension with a syringe from the desired depth. Since this procedure disturbs the sediment sample/suspension above the extraction depth, the subsamples are taken from top to bottom. The densities of the subsamples are measured using an Anton Paar DMA 35 density meter. After the density measurement the subsamples are returned to the settling column. Since the whole sample is disturbed after a complete density profile has been taken, the sample is homogenized again using the same procedure (10 minutes stirring) and the next profile can be taken after e.g. 30 minutes of settling. The described procedure was first presented in https://doi.org/10.3389/feart.2022.916056. In order to improve the data quality, slight modifications of the procedure have been introduced for the collection and evaluation of the presented data set: From the suspension/water surface to the lutocline, the density is set to the measured water density, since the variations in this area are < 1 g/l. To capture the area of the lutocline, where the largest gradients of the density profiles occur, the first subsample was taken 1 cm below the lutocline for each profile. Subsequent subsamples were taken at the fixed depths, 5 cm apart. For the updated version of the dataset, the profiles for 24h settling time for NE-sediment with initial densities of 1050 kg/m³ and 1065 kg/m³ have been repeated and corrected. The results of the previous version suggested irregularities in the recording of these two single profiles, since the integration of the measured densities over the settling column height showed an unusual deviation, compared to the other profiles of the same density. To test the repeatability of the results, the measurement of the 24h profile of sample NE1-8 with an initial density of ~1042 kg/m³ was repeated five times (sample homogenized and allowed to settle for 24h each time). The file NE1-8_1042_24h_Repetitions_DensityProfiles.csv contains the single density profiles of the five repetitions. Examplary explanation of the nomenclature of the files: GSD_NE1-8.txt -> Grain size distribution data for sample NE1-8 (NE1-8 indicates the eighth sample taken during campaign NE1) NE1-8_1035_DensityProfiles.csv -> Time-dependent density profiles of sample NE1-8 with an initial density of 1035 kg/m³. The initial height of the suspension is given in the .csv file (70-80 cm). NE1-8_1042_24h_Repetitions_DensityProfiles.csv -> Repetitions of the density profile of sample NE1-8 with an initial density of ~1042 kg/m³ after 24 hours of settling/consolidation.

Dataset that contains different data on electrochemical and x-ray diffraction experiments of the synthesis and structure investigations of hybrid materials made out of conductive polymers and porous silicon. The mesoporous silicon epilayers are filled electrochemically with the polymers polypyrrole and poly-3,4-ethylendioxythiophen. Polyaniline could only be deposited on top of the porous silicon and not inside the mesopores. If applicable, the galvanostatic raw datasets have to normalized by the epilayer surface area of 7.89cm². The x-ray diffraction data contains both powder diffraction data sets (counts vs. 2-theta) and 2D detector images (P08 DESY synchrotron, 25 keV) of the monomer 2,5-Dibromo-3,4-ethylenedioxythiophene and the polymer poly-3,4-ethylendioxythiophen after solid state polymerization at 60°C. The samples investigated at the synchrotron (2D datasets) are hybrid materials in which the mesoporous pore space of the silicon is filled via spontaneous imbibition of the DBEDOT and subsequently polymerized to PEDOT. Each 2D image is taken at a different z position in order to mitigate beam damage.