A5017076298- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Aerodynamics and Acoustics in Jet Flows
- Analog and Mixed-Signal Circuit Design
- Spectroscopy and Quantum Chemical Studies
- Probabilistic and Robust Engineering Design
- Combustion and flame dynamics
- Laser-Matter Interactions and Applications
- Advanced Thermodynamic Systems and Engines
- Plasma and Flow Control in Aerodynamics
- Wind and Air Flow Studies
- Heat Transfer and Optimization
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
- Advanced Adaptive Filtering Techniques
- Advanced Data Compression Techniques
- Digital Filter Design and Implementation
- Refrigeration and Air Conditioning Technologies
- Spectroscopy and Laser Applications
- Advancements in PLL and VCO Technologies
- Photoreceptor and optogenetics research
Technical University of Munich
2019-2024
STMicroelectronics (Italy)
1999
Wind tunnel models are traditionally machined from high-quality metal material; this condition reduces the possibility to test different geometric variations or as it corresponds incremental cost. In last decade, quality of additive manufacturing techniques has been progressively increasing, while cost decreasing. The utilization 3D-printing suggests improve cost, time, and flexibility a wind model production. Possible disadvantages in terms finishing, stiffness, accuracy investigated,...
Computational fluid dynamics simulations employing eddy-viscosity turbulence models remain the baseline numerical tool in aerospace industry, mainly due to their stability and computational efficiency. However, many industrially relevant cases require a level of accuracy that is not routinely achieved by global models. The simulation leading-edge vortices shed at low aspect ratio wings one such class flows remains challenge for modelling. A local approach proposed which parametrised model...
A low-voltage, low-power, CMOS-programmable analog front-end IC for 2.7-V digital cellular phone applications is presented. The chip can be configured either as a classical A//spl mu/ law PCM codec or 14-bit uniform codec. main objective of the to achieve signal-to-noise (S/N) and signal-to-total-harmonic-distortion (S/THD) ratio complete A/D D/A paths better than 80 dB at full scale. high-performance speech interface made microphone preamplifier with about 0.5 mV offset 1.3 /spl mu/V/sub...
The present work aims at improving the performance of eddy viscosity based Menter-SST turbulence model for complex aircraft flows by adding physical extensions to $\omega$ length scale equation along with calibration aided Uncertainty Quantification methods. Three different on rotation and curvature correction, wake flow correction irrotational strain are added original model, resulting in a parametric which is then calibrated using Bayesian Updates. A series test cases employed assess...
The aerodynamic characteristics of delta wings are dominated by the separation large-scale vortices at swept leading edge. vortex typology and development depends on flow condition wing geometry. numerical solution flows is routinely performed means Reynolds Averaged Navier-Stokes equations because their consolidated stability, computational efficiency, good accuracy with regard to low moderate angles attack. However, high attack generate more intense largely separated which weaken...
Attosecond photoelectron interferometry based on the combination of an attosecond pulse train and a synchronized infrared field is fundamental technique for temporal characterization waveforms investigation electron dynamics in photoionization process. In this approach, comb extreme ultraviolet harmonics typically lies above ionization threshold target under investigation, thus releasing by single-photon absorption. The interaction outgoing with results absorption or emission photons,...
Isotopic substitution in molecular systems can affect fundamental properties including the energy position and spacing of electronic, vibrational rotational levels, thus modifying dynamics associated to their coherent superposition. In extreme ultraviolet spectroscopy, photoelectron leaving molecule after absorption a single photon trigger an ultrafast nuclear motion cation, which lead, eventually, fragmentation. This depends on mass constituents showing, general, significant isotopic...
The present work aims at improving the performance of eddy viscosity-based Menter - Shear Stress Transport turbulence model for complex aircraft flows by adding physical extensions to length-scale equation along with calibration aided uncertainty quantification methods. Three different based on rotation and curvature correction, wake flow irrotational strain correction are added original model, resulting in a parametric which is then calibrated using Bayesian updates. A series test cases...
Low-aspect ratio wing planforms, such as delta wings, experience the predominance on their aerodynamic characteristics of large-scale leading-edge vortices separating around leading edges. Due to important application for highly maneuverable aircraft, physical and understanding related vortex flow is primary relevance. The investigation process routinely performed with numerical simulations employing Reynolds-averaged Navier–Stokes equations. As grows in intensity, limitation ordinary models...
A low-voltage, low-power CMOS single-chip baseband processor for CT2 and CT2+ cordless telephones is presented. The chip integrates a complete voiceband codec, tone generator, G721 adaptive differential pulse code modulation coder/decoder, burst-mode logic controller CT2/CT2+ framings, an I/Q signal generator. only external components are made of two quartz crystals. interfaced with standard microcontrollers through parallel interface. With 2.7 V minimum supply, it consumes normal standby...
The implementation of attosecond photoelectron-photoion coincidence spectroscopy for the investigation atomic and molecular dynamics calls a high-repetition-rate driving source combined with experimental setups characterized by excellent stability data acquisition over time intervals ranging from few hours up to days. This requirement is crucial processes low cross sections characterization fully differential photoelectron(s) photoion(s) angular energy distributions. We demonstrate that...