Andreas Fischer
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View article: Blade surface pressure and drag measurement of a blade section on a 4.3 MW turbine with trailing-edge flaps
Blade surface pressure and drag measurement of a blade section on a 4.3 MW turbine with trailing-edge flaps Open
In this paper we present the measurements of local aerodynamic sectional characteristics on a full-scale rotor blade with a novel add-on instrumentation comprising a wake rake, a pressure belt, and a five-hole Pitot tube. The general objec…
View article: An Investigation of the Laminar–Turbulent Transition Mechanisms of Low-Pressure Turbine Boundary Layers with Linear Stability Theories
An Investigation of the Laminar–Turbulent Transition Mechanisms of Low-Pressure Turbine Boundary Layers with Linear Stability Theories Open
Stability theory offers a practical method on parametric studies that encompass scales in the boundary layer typically not captured in Large Eddy (LES) or Reynolds-Averaged Navier–Stokes (RANS) simulations. We investigated the transition m…
View article: Indirect optical geometry measurements for optically uncooperative measurement objects
Indirect optical geometry measurements for optically uncooperative measurement objects Open
The production of microstructures is becoming increasingly flexible in terms of geometry and material, requiring precise and versatile applicable geometry measurement methods. However, current optical methods depend on the optical surface …
View article: Fluorescence-Based Measurement of Workpiece Geometry and Temperature in Laser Chemical Machining
Fluorescence-Based Measurement of Workpiece Geometry and Temperature in Laser Chemical Machining Open
View article: Cross-sectoral programme “NCCS-Impacts”: synopsis of preliminary results and climate services
Cross-sectoral programme “NCCS-Impacts”: synopsis of preliminary results and climate services Open
In light of ongoing climate change in Switzerland that adversely affects more and more facets in nature, society and economy, a better understanding and handling of the multiple impacts on various sectors is imperative. This aspect is curr…
View article: Synthetic Data Augmentation for Table Detection: Re-evaluating TableNet's Performance with Automatically Generated Document Images
Synthetic Data Augmentation for Table Detection: Re-evaluating TableNet's Performance with Automatically Generated Document Images Open
Document pages captured by smartphones or scanners often contain tables, yet manual extraction is slow and error-prone. We introduce an automated LaTeX-based pipeline that synthesizes realistic two-column pages with visually diverse table …
View article: A parameter study of leading edge protection in a wind tunnel
A parameter study of leading edge protection in a wind tunnel Open
This paper describes the influence of leading edge protection (LEP) on the aerodynamic performance of an airfoil based on wind tunnel tests of a NACA 63 3 − 418 airfoil. Measurements were carried out at a Reynolds number of Re = 5 million …
View article: Concept of Modeling Pharmacist-Led Medication Reviews in Clinical Setting: A Knowledge Graph-Based Approach
Concept of Modeling Pharmacist-Led Medication Reviews in Clinical Setting: A Knowledge Graph-Based Approach Open
Medication reviews (MR) are essential for optimizing patient care and drug therapy safety. This study examined clinical pharmacists’ decision-making during MRs. Five clinical pharmacists from university hospitals in Germany conducted inter…
View article: Blade surface pressure and drag measurement of a blade section on a 4.3 MW turbine with trailing edge flaps
Blade surface pressure and drag measurement of a blade section on a 4.3 MW turbine with trailing edge flaps Open
In this paper we present the measurements of local aerodynamic sectional characteristics on a full-scale rotor blade with a novel add-on instrumentation comprising a wake rake, a pressure belt, and a five hole Pitot tube. The general objec…
View article: Trialog zur Bewältigung extremer Trockenheit in der Schweiz
Trialog zur Bewältigung extremer Trockenheit in der Schweiz Open
Klimabedingte Trockenperioden werden in Zukunft häufiger, intensiver und langandauernder (IPCC 2023). Sie werden auch die Schweiz betreffen. Es liegt im Interesse der Behörden und der Wirtschaft, durch geeignete Massnahmen vor, während und…
View article: Bio-inspired Design Approach and Experimental Validation of a Holistic Lightweight Gear
Bio-inspired Design Approach and Experimental Validation of a Holistic Lightweight Gear Open
Lightweight structures for gears enable a reduction in material usage while maintaining the technical function of the gear. Previous approaches have pursued the strategy of lightweight structures in the gear wheel body. By taking inspirati…
View article: Corrigendum: Weather-dependency of the thermographic flow visualization of the laminar-turbulent transition on wind turbines (2024 <i>Meas. Sci. Technol.</i> 35 095301)
Corrigendum: Weather-dependency of the thermographic flow visualization of the laminar-turbulent transition on wind turbines (2024 <i>Meas. Sci. Technol.</i> 35 095301) Open
View article: In-process analysis of the dynamic deformation of a bionic lightweight gear
In-process analysis of the dynamic deformation of a bionic lightweight gear Open
View article: Complex 3D surface structuring by means of laser chemical machining with modulated laser power
Complex 3D surface structuring by means of laser chemical machining with modulated laser power Open
Laser chemical machining (LCM) utilizes the thermal induced chemical dissolution to remove the material far below the melting temperature. Material removal during LCM with modulated laser power depends on the modulation frequency applied. …
View article: Dynamic displacement measurement of a wind turbine tower using accelerometers: tilt error compensation and validation
Dynamic displacement measurement of a wind turbine tower using accelerometers: tilt error compensation and validation Open
For vibration-based structural health monitoring (SHM) of wind turbine support structures, accelerometers are often used. Besides the structural acceleration, the measured quantity also contains the acceleration component due to gravity, w…
View article: Well-informed neural network: an approach for the prediction of the width of flank wear land in turning processes
Well-informed neural network: an approach for the prediction of the width of flank wear land in turning processes Open
View article: Contributions to increasing the accuracy and reducing the forming forces of robot-based two-point incremental forming
Contributions to increasing the accuracy and reducing the forming forces of robot-based two-point incremental forming Open
This article presents the latest research results on the enhancement of robot-based incremental sheet metal forming performance in detail and comprehensively. Since the low robot stiffness leads to deformations of the robot and thus deviat…
View article: C1.3 - Measurability of changes of the laminar-turbulent transition on wind turbines by means of thermographic flow visualization and a co-rotating measurement platform
C1.3 - Measurability of changes of the laminar-turbulent transition on wind turbines by means of thermographic flow visualization and a co-rotating measurement platform Open
View article: Using optical tweezers for the surface detection of transparent objects: An indirect optical geometry measurement paradigm
Using optical tweezers for the surface detection of transparent objects: An indirect optical geometry measurement paradigm Open
While indirect optical geometry measurements do not rely on the optical characteristics of the target’s surface, they depend on the presence of the fluorescent particles in the surrounding medium. In order to overcome uncertainty limits du…
View article: Tool pose measurement using shadow imaging sensors
Tool pose measurement using shadow imaging sensors Open
Due to the high positioning uncertainty and low stiffness of robots, significant geometrical deviations occur in robotic incremental sheet forming (ISF) which requires an optical in-process tool pose measurement. To achieve a measuring unc…
View article: Lernmodule: CO2- und Wasserfußabdruck
Lernmodule: CO2- und Wasserfußabdruck Open
Die Auszubildenden setzen sich zunächst mit Hilfe eines Informationstextes mit der DIN EN 16258 auseinander. Anschließend geben sie die darin vorkommenden fachspezifischen Abkürzungen mit eigenen Worten wieder. Darauf aufbauend werden den …
View article: Laser power modulation between disturbed and undisturbed material removal regime in laser chemical processing
Laser power modulation between disturbed and undisturbed material removal regime in laser chemical processing Open
Laser chemical machining (LCM) is a method for removing material by thermally induced chemical dissolution of self-passivating metals. However, the process window is limited by disrupted material removal due to gas bubble formation and met…
View article: Herding cats: integrative leadership strategies in inter- and transdisciplinary research programs
Herding cats: integrative leadership strategies in inter- and transdisciplinary research programs Open
This paper focuses on the critical role of integrative leadership in inter- and transdisciplinary (ITD) research programs. ITD programs have become one of academia’s responses to address contemporary sustainability challenges. Fulfilling t…
View article: Indirect optical geometry measurements with a stream of particles as micro probes
Indirect optical geometry measurements with a stream of particles as micro probes Open
View article: Correction: Laser line triangulation for fast 3D measurements on large gears
Correction: Laser line triangulation for fast 3D measurements on large gears Open
View article: Untersuchung der dynamischen Beanspruchung bionischer Leichtbauverzahnungen mittels DMS
Untersuchung der dynamischen Beanspruchung bionischer Leichtbauverzahnungen mittels DMS Open
Zusammenfassung Zur Untersuchung der dynamischen Beanspruchung von ganzheitlich bionischen Leichtbauverzahnungen wird ein In-Prozess-Messsystem mit Dehnungsmessstreifen (DMS) verwendet. Diese werden auf Leichtbaustrukturen im Radkörper mon…
View article: Scatterometric defect measurements – uncertainty assessment by means of a virtual instrument and a statistical analysis
Scatterometric defect measurements – uncertainty assessment by means of a virtual instrument and a statistical analysis Open
Defects in nanostructured surfaces have to be detected in or close to the manufacturing process in the production environment. For this purpose, scatterometry promises a non-contact approach with in-process capability. However, the achieva…
View article: Influence of solar radiation and outside air temperature on the thermographic flow visualization of wind turbines
Influence of solar radiation and outside air temperature on the thermographic flow visualization of wind turbines Open
Infrared thermography (IRT) can be used to visualize the boundary layer flow on wind turbines – during operation and with no need of blade or turbine modification. So far, no other technique is capable of this. IRT uses the temperature dif…
View article: An aerodynamic digital twin of real-world leading edge erosion: Acquisition, Generation and 3D CFD
An aerodynamic digital twin of real-world leading edge erosion: Acquisition, Generation and 3D CFD Open
Wind turbine blades face extremely challenging environmental conditions over their operating life-time, that can easily exceed 2 decades. Airborne particles (insects, sand, rain, hail, ice, sea spray etc.) strike the blade leading edge (LE…
View article: Clinical guidance for unfractionated heparin dosing and monitoring in critically ill patients
Clinical guidance for unfractionated heparin dosing and monitoring in critically ill patients Open
Conventional monitoring assays for heparin dosing have significant limitations. Emerging data appear to favor using anti-Xa assay monitoring for heparin anticoagulation, which many centers have successfully adopted as the standard. The ant…