Technische Universität Dresden

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Research data repository of Dresden University of Technology.

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  • ItemOpen Access
    StageDetect - An image-based tool for automatic water stage detection - image dataset
    (Technische Universität Dresden, 2018) Eltner, Anette
    The dataset includes image sets and data to reference the image measurements. The image sets and datasets are used for figure 3 in the in the WRR manuscript 'Automatic image-based water stage measurement for long-term observations in ungauged catchments'. The image sets comprises the master image of the image sequences captured in frequent interval with Raspberry Pi cameras at the river Wesenitz and Wernersbach in Saxony, Germany. If entire image sequences (instead of single masters) are requested (they are not provided here due to large data size), please contact Anette.Eltner@tu-dresden.de
  • ItemOpen Access
    Experimental, behavioral data
    (Technische Universität Dresden, 2018) Cuevas Rivera, Dario
    Behavioral data for all 35 subjects
  • ItemOpen Access
    Impulsive decision-making predicts the course of substance-related and addictive disorders
    (Technische Universität Dresden, 2018) Kräplin, Anja
    Data and do-files for the analyses presented in the paper "Impulsive decision-making predicts the course of substance-related and addictive disorders" Aims of the analyses: To test whether impulsive decision-making (1) differs between individuals with substance use disorders (SUD) or non-substance-related addictive disorders (ND) and healthy controls and (2) predicts the course of SUD and ND severity after one year. Design of the study: Baseline and one year follow-up of a prospective-longitudinal community study. Setting of the study: Clinical interviews and behavioural tasks in the laboratory. Participants: 338 individuals between age 20 and 26 were selected from a random sample from the registration office files of Dresden, Germany. Participants fulfilled the criteria for one of three groups: SUD, ND, or healthy controls. After one year, we assessed 313 participants again (93%). Measurements: ND and SUD severity were operationalized with number of DSM-5 symptoms (partly modified for ND) and quantity-frequency indices of use. Four tasks were applied to assess independent facets of impulsive decision-making: 1) delay discounting, 2) risk seeking for gains and 3) for losses, and 4) loss aversion.
  • ItemOpen Access
    Snow tracer - Observation and model simulations for laboratory and field experiments
    (Technische Universität Dresden, 2018-04-06) Binder, Martin
    Application of snowmelt as an active and inexpensive dual isotope groundwater tracer - Stable isotope analysis is widely used in environmental tracer studies, e.g. for groundwater flow and discharge quantification. In this context, this study presents an inexpensive approach for the combined use of deuterium (2H) and oxygen-18 (18O) as active semiartificial groundwater tracers by a direct injection of snowmelt into aquifers. This dual isotope approach takes advantage of isotope signature differences between typical groundwater and precipitation water. Aim of this study is the experimental demonstration on laboratory- and field-scale. For this, two column flow experiments were performed using δ2H and δ18O values of snowmelt for breakthrough detection. The differences of the isotope signature between the snowmelt and groundwater were ∆(δ2H) ≈ 61.0 ‰ and ∆(δ18O) ≈ 8.2 ‰. Breakthrough was observed to be almost congruent to a sodium chloride tracer, indicating conservative transport. The low electrical conductivity (EC) of snowmelt (45 µS/cm, i.e. ∆EC ≈ 486 µS/cm to groundwater) was used as an additional easy-to-measure breakthrough indicator. However, the snowmelt EC breakthrough suffered from a slight retardation due to ion exchange. Based on these results, a push-drift-pull tracer test with snowmelt, additionally labeled with uranine, was realized at the field site Pirna, Germany. In the pull phase, a significant isotopic depletion was observed with peak differences of ∆Peak(δ2H) ≈ 24.2 ‰ and ∆Peak(δ18O) ≈ 3.2 ‰, which equals approx. 40 % of the initial difference. The isotope breakthrough was observed to be almost the same as the breakthrough of uranine indicating conservative behavior, while EC breakthrough was affected by ion exchange again.
  • ItemOpen Access
    Highspeed-cutting video
    (Technische Universität Dresden, 2018-05-03) Schuldt, Stefan
    Video 5.1: product: bubble gum, temperature: 30 °C, cutting velocity: 1 m/s, time: 5 s, real time: 50 ms Video 5.2: product: bubble gum, temperature: 30 °C, cutting velocity: 10 m/s, time: 13 s, real time: 13 ms Video 5.3: product: bubble gum, temperature: 20 °C, cutting velocity: 10 m/s, time: 13 s, real time: 13 ms Video 5.4: product: toffee, temperature: 30 °C, cutting velocity: 10 m/s, time: 8 s, real time: 88 ms Video 5.5: product: Salami, temperature: 15 °C, cutting velocity: 0.1 m/s, time: 7 s, real time: 1.47 s Video 5.6: product: Salami, temperature: 15 °C, cutting velocity: 10 m/s, time: 11 s, real time: 85 ms
  • ItemOpen Access
    Benchmark analysis of synthetical images - source code and example DEM data
    (Technische Universität Dresden, 2018-09-12) Wiebicke, Max; Institut für Geotechnik
    These files serve as the basis for a benchmark study on the image analysis to extract contact fabric from x-ray tomographies of granular materials. They are based on the python package "spam": The Software for the Practical Analysis of Materials -- that will soon be open source and installable via pip. For the moment (as of 2018-08-24), see: https://ttk.gricad-pages.univ-grenoble-alpes.fr/spam/intro.html#welcome-to-spam These files support the publication: A benchmark strategy for the experimental measurement of contact fabric
  • ItemOpen Access
    Supplemental Material to "Evaluation of Decentralized, Closely-Spaced Precipitation Water and Treated Waste Water Infiltration" in Journal "Water": Precipitation water and treated wastewater infiltration
    (Technische Universität Dresden, 2018-09-26) Händel, Falk; Engelmann, Christian
    Data includes water contents and concentrations of selected observation points as well as cumulated mass fluxes at selected flux lines generated by different Hydrus 2D/3D numerical models. Location of observation points and flux lines as well as numerical model properties can be accessed from article: Evaluation of Decentralized, Closely-Spaced Precipitation Water and Treated Waste Water Infiltration by Händel et al. as submitted to Journal "Water" in 2018. These data has been used in the Python script for data preparation, processing, assessment and visualization.
  • ItemOpen Access
    Data and Material for "Thinking in Action: Need for Cognition Predicts Self-Control Together with Action Orientation"
    (Technische Universität Dresden, 2018-10-17) Strobel, Alexander; Grass, Julia
    These files provide the questionnaire data and all material for reproducing the results of "Thinking in Action: Need for Cognition Predicts Self-Control Together with Action Orientation" by Julia Grass and colleagues. In detail, it contains the raw and recoded questionnaire data in CSV and SPSS format as well as the SPSS syntax; supplemental information on the questionnaires used in this study and on the variables in the data set; descriptives and reliability of the questionnaire scales; and MPlus input files for the structural equation models estimated in this study.
  • ItemOpen Access
    AsphaleiaDB: Annotierte Quellensammlung zu griechischen Sicherheitsvorstellungen
    (Technische Universität Dresden, 2018-11-08) Pauling, Daniel
    Im Rahmen des DFG-Projekts "Sicherheitsvorstellungen in der Antike" wurde unter Leitung von Daniel Pauling eine umfangreiche Datenbank erstellt, die sämtliche Quellenstellen aus der griechischen Archaik und Klassik enthällt, in denen das Schlagwort ἀσφάλεια (asphaleia) verwendet wurde, welches als "Sicherheit" ins Deutsche übertragen wird. Auf dieser Forschungsdatenbasis wurde die Dissertation von Pauling "Ἀσφάλεια. Die Entwicklung der Sicherheitsvorstellungen und der Diskurs über Sicherheit im archaischen und klassischen Griechenland" erstellt. Sie ist frei verfügbar über den OpenAccess-Server Qucosa sowie im Hochschulschriftenmagazin der SLUB Dresden. Die Quellenstellen wurden gesammelt, archiviert und auf mehreren Ebenen intensiv annotiert und verschlagwortet. Dies geschah ursprünglich im Dateiformat MS Access 2016 (Quellensammlung_Asphaleia_v1.0.1.accdb). Diese Datenbank wird hier der Forschungsgemeinschaft frei zugänglich gemacht. Um eine nachhaltige und dauerhafte Nutzbarkeit zu gewährleisten wird die Access-Datenbank auch als valides TEI XML 1.0 Dokument veröffentlicht (Quellensammlung_Asphaleia_v1.0.1.xml). Die Erschließung der Datenbank in beiden Dateiformaten ermöglicht die Dokumentation im PDF-Format (Quellensammlung_Asphaleia_BeschreibungUndSchlagwortverzeichnis.pdf - Acrobat Reader o.ä. wird benötigt). In ihr werden sämtliche Felder bzw. XML-Elemente (inkl. XPath) der Datenbank sowie die möglichen darin enthaltenen Werte der Datensätze beschrieben und erläutert.
  • ItemOpen Access
    Flow velocity tracking in thermal imagery
    (Technische Universität Dresden, 2018-11-16) Lin, Dong
    Image data set to the submitted WRR publication ”Evaluating Image Tracking Approaches for Surface Velocimetry with Thermal Tracers“. In this paper an automatic approach is proposed to measure flow velocity with an uncooled thermal camera. Hot water is used as thermal tracer. The introduced tracking algorithm utilizes the pyramidal Lucas-Kanade method and is especially suitable for thermal image data. The performance of the new tool is compared to traditional image-based tracking tools, i.e. PIVlab and PTVlab. Experiments are performed in the laboratory for three different flow velocities. Afterwards, tests are conducted in a small stream to illustrate the suitability of the tool for field measurements. Results of the laboratory experiments as well as of the field experiments show that our tracking algorithm, applied to imagery from a thermal camera, outperforms commonly used tracking methods. Our tool provides velocity fields with very high resolution and is in close agreement with reference measurements, whereas PTVlab and PIVlab tend to overestimate and underestimate flow velocities, respectively.
  • ItemOpen Access
    ARRAY2019 Magazine
    (Technische Universität Dresden, 2019) Akkermann, Miriam; International Computer Music Association ICMA
    For the 2019 issue of Array, we focus on the idea of“Agency”in electronic and computer music, explored through the artistic and theoretical reflections of composers, performers, engineers, and musicologists. How do algorithms and artificial intelligences create a particular charac- ter through the decisions they make? How do we interpret the intention of nonhuman agents in the process of musical creation and analysis? Is it possible to tell the difference between the intention of outside agencies from a projection of our own biases? How does the surrounding context integrate into the work itself? The writings present a collection of contemporary approaches and perspectives from the field, examining topics ranging from the agency of digital signal processing and sonic analysis algorithms, to the design of inclusive instrument systems, object based composition, and relational aesthetics. This issue is accompanied by a set media examples: http://dx.doi.org/10.25532/OPARA-45
  • ItemOpen Access
    ARRAY2019 Media
    (Technische Universität Dresden, 2019) Akkermann, Miriam; The International Computer Music Association
    Editorial For the 2019 issue of Array, we focus on the idea of “Agency” in electronic and computer music, explored through the artistic and theoretical reflections of composers, performers, engineers, and musicologists. How do algorithms and artificial intelligences create a particular character through the decisions they make? How do we interpret the intention of nonhuman agents in the process of musical creation and analysis? Is it possible to tell the difference between the intention of outside agencies from a projection of our own biases? How does the surrounding context integrate into the work itself? The writings present a collection of contemporary approaches and perspectives from the field, examining topics ranging from the agency of digital signal processing and sonic analysis algorithms, to the design of inclusive instrument systems, object based composition, and aesthetic considerations on composition and performance in highly relational situations. In accompaniment to the printed issue, we are including this free download of media examples related to the texts.
  • ItemOpen Access
    Benchmark dataset using historical images for an automated evaluation of feature matching methods
    (Technische Universität Dresden, 2019-03-19) Maiwald, Ferdinand
    Image dataset to the submitted ISPRS GSW2019 publication "Generation of a benchmark dataset using historical photographs for an automated evaluation of different feature matching methods". This dataset contains eight triples of historical images for four different sights. Images were chosen with respect to their possible matching quality. The images show combined differences in illumination, field of view, viewpoints, blurring and slight rotation. Some of the images show building reflections in water or extreme shadowing. The images are saved after digitization in full quality as *.tif files with a maximum sidelength of 3543 Pixels. Since no inner orientation could be determined for all image triples the Trifocal Tensor is provided - calculated using Ressl's method (Ressl, 2003). Additional metadata information, copyright disclaimer and permalinks are provided in License.txt. The purpose of the dataset is the evaluation of different feature detection and matching methods using the given orientation with the Trifocal Tensor. Point transfer calculation is possible using the equation on p. 382 in Multiple View Geometry in Computer Vision (Hartley and Zisserman, 2003). Another method uses the corrected Fundamental Matrices calculated in eq. 15.8 from the Trifocal Tensor on p. 374 in Multiple View Geometry in Computer Vision (Hartley and Zisserman, 2003). Ressl, C., 2003. Geometry, constraints and computation of the trifocal tensor. TU Wien. Hartley, R. and Zisserman, A., 2003. Multiple view geometry in computer vision. Cambridge university press.
  • ItemOpen Access
    Benchmark analysis of synthetical images - (updated) source code and example DEM data
    (Technische Universität Dresden, 2019-03-27) Wiebicke, Max
    A benchmark strategy for the experimental measurement of contact fabric(dem2kalisphera). This work develops a strategy to benchmark image analysis tools that can used for the determination of contact fabric from tomographic images. The discrete element method is used to create and load a reference specimen for which the fabric and its evolution is precisely known. Chosen states of this synthetic specimen are turned into realistic images taking into account inherent image properties, such as the partial volume effect, blur and noise. The application of the image analysis tools on these images validates the findings of the metrological study and highlights the importance of addressing the identified shortcomings, i.e., the systematical over-detection of contacts and the strong bias of orientations when using common watersheds. These files serve as the basis for a benchmark study on the image analysis to extract contact fabric from x-ray tomographies of granular materials. They are based on the python package "spam": The Software for the Practical Analysis of Materials -- that will soon be open source and installable via pip. For the moment (as of 2018-08-24), see: https://ttk.gricad-pages.univ-grenoble-alpes.fr/spam/intro.html#welcome-to-spam These files support the publication: A benchmark strategy for the experimental measurement of contact fabric
  • ItemOpen Access
    Plasma steroid profiles in subclinical compared to overt adrenal Cushing’s syndrome
    (Technische Universität Dresden, 2019-03-28) Masjkur, Jimmy
    This supplemental file is derived from responses to the reviewers of the manuscript to provide background to the associated concepts and mathematical and statistical methods.
  • ItemOpen Access
    Critical path analysis tool for heterogeneous applications (CASITA)
    (Technische Universität Dresden, 2019-05-02) Dietrich, Robert
    CASITA is a tool for automatic analysis of OTF2 trace files that have been generated with Score-P. It determines program activities with high impact on the total program runtime and the load balancing. CASITA generates an OTF2 trace with additional information such as the critical path, waiting time, and the cause of wait states. The same metrics are used to generate a summary profile which rates activities according their potential to improve the program runtime and the load balancing. A summary of inefficient patterns exposes waiting times in the individual programming models and APIs. CASITA version 1.9 has been used as proof-of-concept implementation for the dissertation "Scalable Applications on Heterogeneous System Architectures: A Systematic Performance Analysis Framework". Compiling the source code of CASITA requires OTF2 and an MPI library such as OpenMPI.
  • ItemOpen Access
    Anforderungen an die Orchestrierung modularer Prozessanlagen
    (Technische Universität Dresden, 2019-05-07) Unland, Stefan; Holm, Thomas; Keßler, Franziska; Maurmaier, Mathias; Rüde, Timo; Hensel, Stephan; Stutz, Andreas; da Silva Santos, Polyana; Szmais, Stafanie; Stenger, Frank; Schenk, Tim; Urbas, Leon; Klose, Anselm; Welscher, Wolfgang; Apitz, Frank; Eckert, Manfred; Krink, Niclas; Heinze, Sebastian; Bittorf, Lukas; Merkelbach, Silke; Scherwietes, Thomas; Erben, Stefan; Menschner, Anna; Hoernicke, Mario; Schäfer, Christian; Stark, Katharina
    Die Orchestrierung modularer Prozessanlagen beschreibt das Verschalten von modularen Prozesseinheiten (PEA) zu einer modularen Anlage, sowohl aus verfahrenstechnischer, als auch aus automatisierungstechnischer Sicht. In dem vorliegenden Bericht werden verschiedene Aspekte, welche durch die Modularisierung von Prozessanlagen entstehen addressiert und Anforderungen aufgestellt. Die Orchestrierung modularer Anlagen behandelt das Verknüpfen von verschiedenen modularen Prozesseinheiten (PEA) sowohl aus verfahrenstechnischer als auch aus automatisierungstechnischer Sicht. Dabei sind eine Vielzahl von Aspekten zu berücksichtigen.Der Bericht ist aus mehreren Expertenworkshops im Rahmen des ENPRO2.0-Projektes ORCA (FKZ 03ET1517A-I) entstanden.
  • ItemOpen Access
    Flow velocity and discharge measurement in rivers using terrestrial and UAV imagery
    (Technische Universität Dresden, 2019-06-11) Eltner, Anette
    An automatic workflow is introduced, including an image-based tracking tool, to measure surface flow velocities in rivers. The method is based on PTV and comprises an automatic definition of the search area for particles to track. Tracking is performed in the original images. Only the final tracks are geo-referenced, intersecting the image observations with water surface in object space. Detected particles and corresponding feature tracks are filtered considering particle and flow characteristics to mitigate the impact of sun glare and outliers. The method can be applied to different perspectives, including terrestrial and aerial (i.e. UAV) imagery. To account for camera movements images can be co-registered in an automatic approach. In addition to velocity estimates, discharge is calculated using the surface velocities and wetted cross-section derived from surface models computed with SfM and multi-media photogrammetry. The workflow is tested at two river reaches (paved and natural) in Germany. Reference data is provided by ADCP measurements. At the paved river reach highest deviations of flow velocity and discharge reach 5% and 4%, respectively. At the natural river deviations are larger (26% and 20%, respectively) due to the irregular cross-section shapes hindering accurate contrasting of ADCP- and image-based results. The provided tool enables the measurement of surface flow velocities independently of the perspective from which images are acquired. With the contact-less measurement spatially distributed velocity fields can be estimated and river discharge in previously ungauged and unmeasured regions can be calculated.
  • ItemOpen Access
    Supplementary data for manuscript "Quantitation of free glycation compounds in saliva" PLOS ONE
    (Technische Universität Dresden, 2019-07-26) Manig, Friederike
    Raw data of salivary concentrations of glycation compounds; method validation data, Relevant raw data MRP in saliva (PLOS ONE)
  • ItemOpen Access
    Tomographic models of male meiotic spindles
    (Technische Universität Dresden, 2019-08-21) Fabig, Gunar
    3D Model of microtubules and chromosomes from electron tomograms of male meiotic spindles