DaKS - University of Kassel's research data repository

DaKS is the institutional repository of the University of Kassel for research data. It offers structured storage of research data alongside with descriptive metadata, long-term archiving for at least 10 years and – if requested – the publication of the dataset with a DOI.

DaKS is managed by the university library and the IT Service Centre of the University of Kassel. It is hosted at Philipps-Universität Marburg. We are happy to advise you via daks@uni-kassel.de.

Recent Submissions

Anhang - Dissertation Lineare Versorgungstrassen. Konstruktionszeichnungen, methodische Grundlage, gebäudetechnische Auslegungen sowie Daten-Grundlagen zu Ökologie/Ökonomie
(Universität Kassel) Witteborg, Norman
Dies ist der gesamte Anhang der Dissertation „Lineare Versorgungstrassen. Entwicklung eines neuen besonders flexiblen Systems zur Integration der Gebäudetechnik in Bürogebäude mit dem Ziel einer nachhaltigeren Nutzung“. Neben einer Übersicht der einzelnen Anhänge A bis I mit Planübersichten und Variantenanalysen der betrachteten gebäudetechnischen Gewerke (Lüftungs-, Heizungs-, Kühlungs-, und Elektrotechnik) umfasst der gesamte Datensatz unter anderem Konstruktionszeichnungen, Pläne zur Entwicklung der Methodik, gebäudetechnische Auslegungen, Datenblätter bereits bestehender Referenzsysteme sowie Daten-Grundlagen zur Erstellung von Ökobilanzen und zur Bewertung ökonomischer Aspekte.
Monte-Carlo simulation of the three dimensional transfer function for coherence scanning interferometry [Code/Data]
(Universität Kassel) Künne, Marco; Rosenthal, Felix; Lehmann, Peter
The provided code is meant to simulate the 3D transfer function of a coherence scanning interferometer (CSI), which is a new approach to describe the transfer behavior of optical systems containing a depth scan. The software code is a python script which calculates the 3D optical transfer function by using a Monte-Carlo method applying reversed sampling. The related mathematical details and can be found in the related publication. The system which is simulated by the code is set to a numerical aperture of 0.9 and considers only monochromatic illumination of 440 nm. The .h5 dataset contains the raw data from the CSI measurement shown as a comparison. A silicon mirror was used as an measurement object, while the CSI used in this case is a Linnik setup. The provided code imports this dataset, plots an interferogram from one pixel and calculates its spectrum as a comparison to the histograms computed by the statistical Monte-Carlo simulation. The .npz files contain the analytically calculated transfer functions, based on the universal fourier optics model. The file "TF_ps.npz" is for the monochromatic case of royal blue illumination, while the file "TF_ps_spec_rb.npz" considers an full width of half maximum (FWHM) of 20 nm of the illuminating royal blue LED as presented in the paper. Running the simulation code should work without adjustments other than the paths of the datasets which have to be imported. Make sure plots of datasets that are not provided or necessary are commented out.
Motion of water-immersed superparamagnetic microparticles on top of a topographically flat thin film substrate imprinted with engineered magnetic stripe domains of gradually increasing/decreasing stripe width and alternating head-to-head/tail-to-tail magnetization configuration
(Universität Kassel) Huhnstock, Rico; Ehresmann, Arno
The controlled transport and fractionation of magnetic microparticles according to their structural and magnetic properties is of great importance for the realization of miniaturized Lab-on-a-chip devices, applicable, e.g., for medical point-of-care diagnostics. We designed a transport and pre-sorting system for superparamagnetic beads based on an engineered magnetic stray field landscape emerging from a magnetic stripe domain pattern inside an exchange-biased thin film system. The magnetic stripe domains were imprinted into the system via ion bombardment induced magnetic patterning. The pattern consists of stripe domains with gradually increasing and decreasing stripe width, periodically repeated across the whole substrate. Directed motion of superparamagnetic beads above the substrate inside a quiescent liquid (water) is induced by applying weak external magnetic field pulses, superposing the static magnetic stray field landscape. The beads are forced to perform a jumping motion with increasing/decreasing jump length owing to the arrangement of the underlying domain pattern. Our data shows a simultaneous fractionation of all particles into mobile and immobile units according to their magnetophoretic mobilities. The motion velocity of the particles is thereby a function of jump length (stripe domain width) and the magnitude of the external field pulses. Superparamagnetic beads of significantly different sizes can be spatially separated using a short sequence of constant field pulses.

Videos of the particle motion were recorded using high-speed cameras attached to an optical microscope. The water-dispersed particles were placed on top of the magnetically patterned substrate inside a microfluidic chamber and motion was initiated by applying periodically repeated magnetic field pulses (pulse lengths in the ms-range; pulse magnitudes in the mT-range) using orthogonally arranged Helmholtz coils. The videos were analyzed qualitatively and quantitatively (particle velocity) using a custom Python code.
Interviewtranskripte "Die Akzeptanz der Ergebnisse sozialrechtlicher Schiedsstellen"
(Universität Kassel) Beyerlein, Michael
Der Datensatz enthält Transkripte von Interviews, die im Rahmen der Dissertation "Die Akzeptanz der Ergebnisse sozialrechtlicher Schiedsstellen - Ein Beitrag zur interdisziplinären Rechtsforschung mit Fokus auf Akteure der Eingliederungshilfe und der Sozialen Pflegeversicherung" von Michael Beyerlein geführt wurden. Untersucht wurde die Frage, welche Faktoren zur Akzeptanz von sozialrechtlichen Schiedssprüchen durch Konfliktparteien beitragen. Expertinnen und Experten in den Feldern Eingliederungshilfe und Pflege wurden zu deren Sicht auf das Schiedsverfahren, damit verbundene Erwartungen und Gründe für die Akzeptanz oder Ablehnung der Entscheidung interviewt.
Gonioreflectometric measurements in the mid-wavelength infrared range
(Universität Kassel) Noori, Hoschang
A gonioreflectometer for the mid-wavelength infrared range was built to measure the emissivity of rough surfaces without contact. Gonioreflectometric measurements were conducted for several surface materials. Every HDF5-File contains the thermal images for a camera angle and incident angles from 1° to 90°, with open and closed chopper. For the camera angle of 15°, the data for incident angles from 3° to 87° degree is usable. Usable is the data from 1° to 87° for Camera angles of 20°, 30°, 40°, 45°, 50°, 60°, 70°, 80°, 85°. The thermal images are available as temperature values in °C, radiance value in W/sr/m^2 and digital values. The radiance values are determined via Plancks Law. The rotation stage for the integrating sphere moves continuously with 10° per second, and the MWIR camera takes 10 HDR thermal image every second with the fastest possible frame rate to ensure the correctness of the angle.