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During the measurement campaign FROST (FReezing Of duST), LACIS (Leipzig Aerosol Cloud Interaction Simulator) was used to investigate the immersion freezing behavior of size selected, coated and uncoated Ari-zona Test Dust (ATD) particles with a mobility diameter of 300 nm. Particles were coated with succinic acid (C 4 H 6 O 4), sulfuric acid (H 2 SO 4) and(More)
Kaolinite particles from two different sources (Fluka and Clay Minerals Society (CMS)) were examined with respect to their ability to act as ice nuclei (IN). This was done in the water-subsaturated regime where often de-position ice nucleation is assumed to occur, and for water-supersaturated conditions, i.e., in the immersion freezing mode. Measurements(More)
Abstruct-The design of highQ lowdistortion surface acoustic wave (SAW) resonators requires techniques and data for minimizing acoustic losses and accurate placementof the device resonance. Several aspects of one-and two-port SAW resonator design and fabrication are discussed. It is shown that devices on quartz consisting of recessed aluminum transducers and(More)
The present work addresses the various ingredients required for reliable finite element simulations of cold isostatic pressing (CIP) of metal powders. A plastic constitutive model for finite deformation is presented and implemented into an explicit finite element (FE) code. The FE implementation is verified so that numerical errors (both temporal and(More)
Seven different instruments and measurement methods were used to examine the immersion freezing of bacterial ice nuclei from Snomax ® (hereafter Snomax), a product containing ice-active protein complexes from non-viable Pseudomonas syringae bacteria. The experimental conditions were kept as similar as possible for the different measurements. Of the(More)
Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×10 19 eV by analyzing cosmic rays with energies above E ≥ 5×10 18 eV arriving within an angular separation of approximately 15 •. We characterize the(More)
This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Seven different instruments and measurement methods were used to examine the immersion freezing of bacterial ice nuclei from Snomax ® (hereafter Snomax), a product containing ice(More)
To enable smaller and more cost efficient inverter designs, new power modules are designed for low losses, reliable operation at high temperature, high current and high switching frequencies. The IGBT module design presented in this paper features large silicon active area for low on-state losses, good internal temperature distribution, high current(More)