@article{Huber,
  author    = {Huber, Albert},
  title     = {The gravitational field of a massless particle on the horizon of a stationary black hole},
  series = {Classical and Quantum Gravity},
  journal   = {Classical and Quantum Gravity},
  abstract  = {In this work, the field of a gravitational shockwave generated by a massless point-like particle is calculated at the event horizon of a stationary Kerr-Newman black hole. Using the geometric framework of generalized Kerr-Schild deformations in combination with the spin-coefficient formalism of Newman and Penrose, it is shown that the field equations of the theory, at the event horizon of the black hole, can be reduced to a single linear ordinary differential equation for the so-called profile function of the geometry. This differential relation is solved exactly. Based on the results obtained, a physical interpretation is given for the found shockwave spacetime, and it is clarified how these results lead back to those of previous works on the subject, which deal with the much simpler cases of gravitational shockwaves in static black hole backgrounds.},
  subject      = {Gravitation},
  language  = {en}
}
@article{BelkacemKupkaPhilidetetal.,
  author    = {Belkacem, K{\´e}vin and Kupka, Friedrich and Philidet, Jordan and Samadi, R{\´e}za},
  title     = {Surface effects and turbulent pressure. Assessing the Gas-Γ1 and Reduced-Γ1 empirical models.},
  series = {Astronomy \& Astrophysics},
  journal   = {Astronomy \& Astrophysics},
  subject      = {Surface},
  language  = {en}
}
@article{Huber,
  author    = {Huber, Albert},
  title     = {Junction Conditions and local Spacetimes in General Relativity},
  series = {The European Physical Journal C},
  journal   = {The European Physical Journal C},
  abstract  = {In the present work, a theoretical framework focussing on local geometric deformations is introduced in order to cope with the problem of how to join spacetimes with different geometries and physical properties. This framework is used to show that two Lorentzian manifolds can be matched by considering local deformations of the associated spacetime metrics. Based on the fact that metrics can be suitably matched in this way, it is shown that the underlying geometric approach allows the characterization of local spacetimes in general relativity. Furthermore, it is shown that said approach not only extends the conventional thin shell formalism, but also allows the treatment of geometric problems that cannot be treated with standard gluing techniques.},
  subject      = {Relativity},
  language  = {en}
}
@article{KostogryzKupkaPiskunovetal.,
  author    = {Kostogryz, Nadiia M. and Kupka, Friedrich and Piskunov, Nikolai and Fabbian, Damian and Kr{\"u}ger, Daniel and Gizon, Laurent},
  title     = {Accurate Short-Characteristics Radiative Transfer in A Numerical Tool for Astrophysical Research (ANTARES)},
  series = {Solar Physics},
  journal   = {Solar Physics},
  subject      = {Astrophysics},
  language  = {en}
}
@article{KrizekHausleitnerBoehmeetal.,
  author    = {Krizek, Gerd Christian and Hausleitner, Rene and B{\"o}hme, Laura and Olaverri-Monreal, Cristina},
  title     = {Empirical Analysis of Safe Distance Calculation by the Stereoscopic Capturing and Processing of Images Through the Tailigator System},
  series = {sensors},
  journal   = {sensors},
  abstract  = {Driver disregard for the minimum safety distance increases the probability of rear-end collisions. In order to contribute to active safety on the road, we propose in this work a low-cost Forward Collision Warning system that captures and processes images. Using cameras located in the rear section of a leading vehicle, this system serves the purpose of discouraging tailgating behavior from the vehicle driving behind. We perform in this paper the pertinent field tests to assess system performance, focusing on the calculated distance from the processing of images and the error margins in a straight line, as well as in a curve. Based on the evaluation results, the current version of the Tailigator can be used at speeds up to 50 km per hour without any restrictions. The measurements showed similar characteristics both on the straight line and in the curve. At close distances, between 3 and 5 m, the values deviated from the real value. At average distances, around 10 to 15 m, the Tailigator achieved the best results. From distances higher than 20 m, the deviations increased steadily with the distance. We contribute to the state of the art with an innovative low-cost system to identify tailgating behavior and raise awareness, which works independently of the rear vehicle's communication capabilities or equipment.},
  subject      = {tailgating},
  language  = {en}
}
@article{KierspelKadekBarranetal.,
  author    = {Kierspel, Thomas and Kadek, Alan and Barran, Perdita and Bellina, Bruno and Bijedic, Adi and Brodmerkel, Maxim N. and Commandeur, Jan and Caleman, Carl and Damjanovic, Tomislav and Dawod, Ibrahim and De Santis, Emiliano and Lekkas, Alexandros and Lorenzen, Kristina and L{\´o}pez Morillo, Luis and Mandl, Thomas and Marklund, Erik G. and Papanastasiou, Dimitris and Ramakers, Lennart A. I. and Schweikhard, Lutz and Simke, Florian and Sinelnikova, Anna and Smyrnakis, Athanasios and Timneanu, Nicusor and Uetrecht, Charlotte},
  title     = {Coherent diffractive imaging of proteins and viral capsids: simulating MS SPIDOC},
  series = {Analytical and Bioanalytical Chemistry},
  volume    = {2023},
  journal   = {Analytical and Bioanalytical Chemistry},
  number    = {415},
  doi       = {https://doi.org/10.1007/s00216-023-04658-y},
  pages     = {4209 -- 4220},
  abstract  = {MS SPIDOC is a novel sample delivery system designed for single (isolated) particle imaging at X-ray Free-Electron Lasers that is adaptable towards most large-scale facility beamlines. Biological samples can range from small proteins to MDa particles. Following nano-electrospray ionization, ionic samples can be m/z-filtered and structurally separated before being oriented at the interaction zone. Here, we present the simulation package developed alongside this prototype. The first part describes how the front-to-end ion trajectory simulations have been conducted. Highlighted is a quadrant lens; a simple but efficient device that steers the ion beam within the vicinity of the strong DC orientation field in the interaction zone to ensure spatial overlap with the X-rays. The second part focuses on protein orientation and discusses its potential with respect to diffractive imaging methods. Last, coherent diffractive imaging of prototypical T = 1 and T = 3 norovirus capsids is shown. We use realistic experimental parameters from the SPB/SFX instrument at the European XFEL to demonstrate that low- resolution diffractive imaging data (q < 0.3 nm -1 ) can be collected with only a few X-ray pulses. Such low-resolution data are sufficient to distinguish between both symmetries of the capsids, allowing to probe low abundant species in a beam if MS SPIDOC is used as sample delivery.},
  subject      = {SPI},
  language  = {en}
}