TY - THES U1 - Master Thesis A1 - Alaee, Ladan T1 - Design and Implementation of a Mixed-Signal Processing Chain for the Optical Determination of Rotation Angles N2 - The aim of this master thesis is the design and implementation of mixed-signal processing chain for the optical determination of rotation angles by means of four sensors implemented as photodiodes with integrated polarization filters and a high-precision CORDIC hardware design implemented on an FPGA in Verilog. Furthermore, a light source and a polarizer are integrated in the measurement setup which is configured using an QT application. Y2 - 2024 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-37932 U6 - https://doi.org/10.26205/opus-3793 DO - https://doi.org/10.26205/opus-3793 SP - 264 S1 - 264 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Blome, Frerk A1 - Möller, Christina A1 - Böning, Anja T1 - Open House? - Class-specific career opportunities within German universities JF - Social Inclusion N2 - This article focuses on the development of class-specific inequalities within German universities. Based on data on the social origin of students, doctoral students, and professors in the long-term cross-section, the article views the empirically observable dynamic of social closure of higher education since the 1950s. The focus of interest is on the level of the professorship. Data show that career conditions for underprivileged groups have deteriorated again. This finding is discussed in the context of social closure theories. The article argues that closure theories consider social closure processes primarily as intentional patterns of action, aimed at a strategic monopolization of participation, and securing social power. Such an analytical approach means that unintended closure processes remain understudied. Our conclusion is that concealed modes of reproduction of social structures ought to be examined and theorized more intensively due to their importance for the elimination of social inequality within universities. Y1 - 2019 U6 - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-20184 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-20184 SN - 2183-2803 SS - 2183-2803 VL - 7 (2019) IS - 1 SP - 101 EP - 110 ER - TY - RPRT U1 - Forschungsbericht A1 - Faix, Axel A1 - Büchler, Jan-Philipp T1 - Competitive advantage through innovation management BT - analyzes and results of the IHK-InnoMonitor 2015 N2 - Band 1 der Forschungsberichte zum Innovationsmanagement, herausgegeben von der Forschungsgruppe Innovationsexzellenz der Fachhochschule Dortmund (Jan-Philipp Büchler, Axel Faix, Wolfgang Müller) Y2 - 2015 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-21458 U6 - https://doi.org/10.26205/opus-2145 DO - https://doi.org/10.26205/opus-2145 SP - 10 S1 - 10 ER - TY - THES U1 - Master Thesis A1 - García Rodríguez, Saul T1 - Design and FPGA implementation of a highly resource-efficient AES-256 encryption and decryption engine N2 - Growing demand for security in a wide range of fields gives raise to research for more efficient and modern methods. Additionally, the increase of systems that are deployed on hardware requires security to be embedded in small area to protect intellectual property, hardware, and integrity and confidentially of sensible data. Therefore, in this work a design and FPGA implementation of a highly resource-efficient AES-256 encryption and decryption engine is presented, as well as its comparison with state-of-the-art designs. The design shows a reduction in the resources used due to its architecture to reuse hardware throughout all the processing. The design is implemented on a Xilinx Artix-7 FPGA. KW - AES KW - encryption KW - security KW - FPGA KW - decryption Y2 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-37471 U6 - https://doi.org/10.26205/opus-3747 DO - https://doi.org/10.26205/opus-3747 SP - 263 S1 - 263 ER - TY - THES U1 - Master Thesis A1 - Jung, Richard T1 - Radiation Qualification of the Cologne Chip GateMate A1 FPGA N2 - In this thesis, the radiation sensitivity of the novel Cologne Chip GateMate A1 field-programmable gate array (FPGA) is evaluated. An initial introduction of radiation mechanisms and their effects on electronics is given, followed by a brief overview of radiation test standards. The common elements present in FPGAs are discussed, which is followed by details of the GateMate FPGA device and a description of the software design flow. Afterwards, the development of a purpose-built printed circuit board (PCB) for radiation tests with the GateMate FPGA is detailed. Four components of the GateMate have been tested during three radiation campaigns, as well as a benchmark circuit to compare the radiation performance of the GateMate with other FPGAs tested at the European Organization for Nuclear Research (CERN). The test architecture consists of the device under test (DUT) FPGA and a TESTER FPGA whose task is to provide inputs to the DUT and record its response. The DUT and TESTER designs developed for all tests are discussed in detail. Finally, the results obtained during the irradiation campaigns are presented, showing that the GateMate FPGA performs similarly to other FPGAs using the same process technology. Only the benchmark test was not finalized, as implementation problems prevented its completion in the given time frame. The thesis concludes with a comprehensive summary and outlook. N2 - In dieser Arbeit wird die Strahlungsempfindlichkeit des neuartigen Cologne Chip GateMate A1 FPGA untersucht. Zunächst wurde eine Einführung in Strahlungseffekte und ihre Auswirkungen auf elektronische Komponenten gegeben, gefolgt von einem kurzen Überblick auf aktuelle Strahlungsteststandards. Die üblichen Elemente in FPGAs werden diskutiert, gefolgt von Details über GateMate spezifische Elementen sowie eines Überblicks über den Software-Design-Flow für GateMate FPGA Anwendungen. Im Anschluss wird die Entwicklung eines PCBs für Bestrahlungstests des GateMates detailliert. Vier Komponenten des GateMate wurden während drei Strahlungskampagnen getestet, sowie eine Benchmark-Schaltung, um die Strahlungsempfindlichkeit des GateMate mit anderen am CERN getesteten FPGAs zu vergleichen. Die Testarchitektur besteht aus dem DUT FPGA und einem TESTER FPGA, dessen Aufgabe es ist, Eingaben an das DUT zu liefern und dessen Reaktion aufzuzeichnen. Die für alle Tests entwickelten DUT- und TESTER-Designs werden im Detail diskutiert. Schließlich werden die während der Bestrahlungskampagnen erzielten Ergebnisse vorgestellt, die zeigen, dass der GateMate FPGA ähnliche wie andere FPGAs mit vergleichbarer Prozesstechnologie liefert. Lediglich der Benchmark-Test wurde nicht finalisiert, da Probleme bei der Implementierung die Fertigstellung im vorgegebenen Zeitrahmen verhinderten. Die Arbeit schließt mit einer umfassenden Zusammenfassung und einem Ausblick ab. KW - FPGA KW - Radiation qualification KW - CERN KW - LHC KW - GateMate Y2 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33643 U6 - https://doi.org/10.26205/opus-3364 DO - https://doi.org/10.26205/opus-3364 SP - 118 S1 - 118 ER - TY - THES U1 - Master Thesis A1 - Koers, Lars T1 - Setup of test environments based on a Xilinx Zynq SoC for measuring the leakage current and for radiation qualifcation of SRAM based FPGAs N2 - This thesis discusses the development of test environments using Xilinx Zynq System on Chip (SoC) for measuring leakage currents and radiation qualification of Static Random Access Memory (SRAM) based Field Programmable Gate Arrays (FPGAs) at European Organisation for Nuclear Research (CERN). The effects of radiation on electronic components are explained, followed by an introduction to the FPGAs used. The GateMate FPGAs leakage current is measured in its application area with respect to temperature and core voltages. A comparable testing environment is used from the tester to the tested device, as it will later be used at CERN. The GateMate is being prepared in this setup for the finalization of radiation qualification at CERN, to be transferred later. For this purpose, the basic tests are explained and the outstanding tests are then carried out. The Lattice iCE40 UltraLite FPGA is used in an initial application test to determine its suitability for further radiation qualification tests at CERN. The analysis and presentation of the test results are followed by a summary and outlook. N2 - Diese Arbeit behandelt die Entwicklung von Testumgebungen mit einem Xlinix Zynq SoC zur Messung von Leckströmen sowie der Strahlenqualifizierung von SRAM basierten FPGAs am CERN. Zunächst werden die Effekte von Strahlung sowie deren Wirkung auf elektronische Komponenten erläutert. Anschließend wird eine Einführung in die verwendeten FPGAs gegeben. In der Durchführung wird der Leckstrom des GateMate FPGAs in seinem Einsatzbereich hinsichtlich Temperatur und Core-Spannungen gemessen. Es wird eine Testumgebung mit ähnlichen Verbindungen zwischen Tester und Testgerät verwendet, wie sie später bei Bestrahlungsstudien am CERN Anwendung findet. Der GateMate wird in diesem Setup für die Finalisierung der Strahlenqualifikation vorbereitet, um die spätere Inbetriebnahme am CERN zu beschleunigen. Dazu werden die Tests grundlegend erläutert und die noch ausstehenden im Anschluss durchgeführt. Der Lattice iCE40 UltraLite FPGA wird in einem ersten Applikationstest eingesetzt, um seine Eignung für weitere Tests zur Strahlenqualifikation am CERN zu bestimmen. Die Ergebnisse aller durchgeführten Tests werden ausgewertet und dargestellt. Abschließend wird eine Zusammenfassung mit Ausblick präsentiert. Y2 - 2024 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-38039 U6 - https://doi.org/10.26205/opus-3803 DO - https://doi.org/10.26205/opus-3803 SP - 136 S1 - 136 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Lattner, Yannick A1 - Geller, Marius T1 - Radial Turbocompressor Chord Length Approximation for the Reynold's Number Calculation N2 - We present an approximation model for the chord length of radial turbocompressors. The model enables the calculation of a compressor's chord Reynold's number during the machine design process. The chord Reynold's number is shown to be the most accurate representation of the fluid dynamic properties inside the radial turbocompressor's impeller. It — however — requires the computation of the chord length, which is only available after defining the final impeller geometry. The method presenting in this paper only employs the compressors principal dimensions to approximate the chord length. The chord is modelled using a Bézier spline and quarter ellipse. This enables the earlier use of the chord Reynold's number during the machine design process of radial turbocompressors. KW - Strömungsmaschine , Reynolds-Zahl KW - Radial turbocompressors KW - Reynold's number KW - Turbomachinery KW - Design methods Y1 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33351 U6 - https://doi.org/10.26205/opus-3335 DO - https://doi.org/10.26205/opus-3335 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - nicht begutachtet (unreviewed) A1 - Lattner, Yannick A1 - Geller, Marius A1 - Kluck, Norbert T1 - Efficiency Approximation of Centrifugal Compressors in the Cordier Diagram N2 - We present a simulation data-based efficiency approximation for radial turbocompressors, which is implemented in the well-known Cordier diagram. A sophisticated CAE workflow is used to calculate the operational characteristics of 50 machine designs with 50 impeller geometry variations each. A Kriging-based surrogate model is trained to approximate the efficiency of any machine designs' best geometry design. The models are implemented into a machine design workflow. As a result, duty-specific Cordier lines are introduced. They are automatically generated for a set of machine design parameters. The efficiency of the designs along the duty-specific Cordier lines is approximated. Using optimization techniques, an optimal compressor design for the given duty on every specific Cordier line may be identified. This highly increases the amount of information available in the early design stages for radial turbocompressors. KW - CENTRIFUGAL COMPRESSOR, CORDIER DIAGRAM, CFD, METAMODELING, DESIGN OF EXPERIMENTS Y1 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33661 U6 - https://doi.org/10.26205/opus-3366 DO - https://doi.org/10.26205/opus-3366 SP - 12 S1 - 12 ER - TY - THES U1 - Bachelor Thesis A1 - Müller-Baumgart, Antonia T1 - Estimation of fuel consumption of pleasure vessels based on environmental data models Y2 - 2022 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-31988 U6 - https://doi.org/10.26205/opus-3198 DO - https://doi.org/10.26205/opus-3198 SP - 130 S1 - 130 ER - TY - THES U1 - Master Thesis A1 - Müller-Baumgart, Ulf T1 - Creation of general representation of a local power grid as a basis for an embedding of electrical devices Y2 - 2024 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-37955 U6 - https://doi.org/10.26205/opus-3795 DO - https://doi.org/10.26205/opus-3795 SP - 96 S1 - 96 ER -