7,009 results on '"Jäckel A"'
Search Results
2. On the time-dependent density of quadratically coupled dark matter around ordinary matter objects
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Burrage, Clare, Elder, Benjamin, del Castillo, Yeray Garcia, and Jaeckel, Joerg
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,General Relativity and Quantum Cosmology - Abstract
Wave-like dark matter may feature quadratic couplings to ordinary matter. This carries profound consequences for the phenomenologies of such models. It changes the dark matter density around dense objects made from ordinary matter such as planets and stars, thereby changing the sensitivity of direct detection experiments on Earth as well as implying forces on other ordinary matter objects in the vicinity. In this note we study the time dependence of the dark matter field around spherical objects of ordinary matter. This work indicates the time-scale on which accelerating objects settle into a stationary state and delineates the applicability of stationary solutions for experimental dark matter tests. We also use this to understand (and effectively eliminate) the infinities in energies, forces, and pressures that appear when naively comparing the total energy around objects with different size but the same total number of ordinary matter particles., Comment: 31 pages, 10 figures
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- 2024
3. Role of Non-Cognitive Variables in Learner Performance among Disadvantaged Learners
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Dirk Jacobus Pretorius, Michelle Jäckel-Visser, and Dirk Johannes Malan
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We acknowledge the existing educational inequalities that South Africa faces as a result of differences in developmental and equal educational opportunities. The aim with this study was to investigate the role of non-cognitive learning performance variables that affect the learning performance and success of secondary-school learners. Data were collected from a sample of 395 Grade 9 learners. The proposed learning performance structural model was empirically evaluated by using various instruments and was analysed by means of structural equation modelling. The results indicate statistically significant positive relationships between learning performance and cognitive engagement, learning performance and grit, cognitive engagement and conscientiousness, grit and learning motivation, grit and cognitive engagement, learning motivation and parental quality, learning motivation and tenacity, learning motivation and cognitive engagement, and conscientiousness and resilience. Both tenacity and parental quality acted as moderators of the relationship between environmental unfavourableness and cognitive engagement. The selection of variables was more effective in explaining variance in cognitive engagement than in learning performance. The results of the study could be used to facilitate cognitive engagement as a pivotal variable in learning success among secondary-school learners.
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- 2024
4. Star Shearing Season -- Transient Signals in Wave-like Dark Matter Experiments from Black Hole Formation
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de Giorgi, Arturo and Jaeckel, Joerg
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
Ordinary matter coupled to light weakly interacting bosons can lead to the formation of a macroscopic bosonic field in the vicinity of large matter concentrations such as ordinary or neutron stars. When these objects are turned into black holes due to a supernova or a binary merger this ''hair'' could be ''shorn'' off. Part of the field configuration would then be released leading to an outgoing field wave. For small masses this field transient remains rather compact and can induce a transient signal in experiments, in particular those that look for wave-like dark matter. This signal can be correlated with the corresponding astrophysical signal of the event. In this note, we consider a variety of couplings and the associated signals and estimate the corresponding sensitivities., Comment: 26 pages, 11 figures, 2 tables
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- 2024
5. Field Redefinitions in Classical Field Theory with some Quantum Perspectives
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Criado, Juan Carlos, Jaeckel, Joerg, and Spannowsky, Michael
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High Energy Physics - Phenomenology ,High Energy Physics - Theory - Abstract
In quantum field theories, field redefinitions are often employed to remove redundant operators in the Lagrangian, making calculations simpler and physics more evident. This technique requires some care regarding, among other things, the choice of observables, the range of applicability, and the appearance and disappearance of solutions of the equations of motion (EOM). Many of these issues can already be studied at the classical level, which is the focus of this work. We highlight the importance of selecting appropriate observables and initial/boundary conditions to ensure the physical invariance of solutions. A classical analogue to the Lehmann-Symanzik-Zimmermann (LSZ) formula is presented, confirming that some observables remain independent of field variables without tracking redefinitions. Additionally, we address, with an example, the limitations of non-invertible field redefinitions, particularly with non-perturbative objects like solitons, and discuss their implications for classical and quantum field theories., Comment: 29 pages, 2 figures
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- 2024
6. An Application of Large Language Models to Coding Negotiation Transcripts
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Friedman, Ray, Cho, Jaewoo, Brett, Jeanne, Zhan, Xuhui, Han, Ningyu, Kannan, Sriram, Ma, Yingxiang, Spencer-Smith, Jesse, Jäckel, Elisabeth, Zerres, Alfred, Hooper, Madison, Babbit, Katie, Acharya, Manish, Adair, Wendi, Aslani, Soroush, Aykaç, Tayfun, Bauman, Chris, Bennett, Rebecca, Brady, Garrett, Briggs, Peggy, Dowie, Cheryl, Eck, Chase, Geiger, Igmar, Jacob, Frank, Kern, Molly, Lee, Sujin, Liu, Leigh Anne, Liu, Wu, Loewenstein, Jeffrey, Lytle, Anne, Ma, Li, Mann, Michel, Mislin, Alexandra, Mitchell, Tyree, Nagler, Hannah Martensen née, Nandkeolyar, Amit, Olekalns, Mara, Paliakova, Elena, Parlamis, Jennifer, Pierce, Jason, Pierce, Nancy, Pinkley, Robin, Prime, Nathalie, Ramirez-Marin, Jimena, Rockmann, Kevin, Ross, William, Semnani-Azad, Zhaleh, Schroeder, Juliana, Smith, Philip, Stimmer, Elena, Swaab, Roderick, Thompson, Leigh, Tinsley, Cathy, Tuncel, Ece, Weingart, Laurie, Wilken, Robert, Yao, JingJing, and Zhang, Zhi-Xue
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Computer Science - Computation and Language ,Computer Science - Artificial Intelligence - Abstract
In recent years, Large Language Models (LLM) have demonstrated impressive capabilities in the field of natural language processing (NLP). This paper explores the application of LLMs in negotiation transcript analysis by the Vanderbilt AI Negotiation Lab. Starting in September 2022, we applied multiple strategies using LLMs from zero shot learning to fine tuning models to in-context learning). The final strategy we developed is explained, along with how to access and use the model. This study provides a sense of both the opportunities and roadblocks for the implementation of LLMs in real life applications and offers a model for how LLMs can be applied to coding in other fields.
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- 2024
7. HyperLSW: Ultimate light-shining-through-a-wall experiments to establish QCD axions as the dominant form of dark matter
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Hoof, Sebastian, Jaeckel, Joerg, and Lucente, Giuseppe
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
Should dark matter (DM) axions be discovered in a haloscope, follow-up experiments will be necessary to break the degeneracy between the axions' coupling to photons and their local DM abundance. Given that a discovery would justify more significant investments, the present work assesses the prospects of ambitious light-shining-through-a-wall (LSW) experiments to target the QCD axion band. Thanks to the excellent mass determination in haloscopes, we show how to design HyperLSW, an LSW experiment with suitably aligned magnetic fields to reach a wide range of well-motivated axion models and to determine whether axions are the dominant form of DM in the Universe. In addition to presenting a concrete plan for post-discovery experimental efforts, we also briefly discuss complementary experiments and future directions beyond LSW experiments., Comment: 11+13 pages, 10 figures
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- 2024
8. Delirium after cardiac arrest: incidence, risk factors, and association with neurologic outcome—insights from the Freiburg Delirium Registry
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Staudacher, Dawid Leander, Heine, Laura, Maier, Alexander, Kaier, Klaus, Heidenreich, Adrian, Rilinger, Jonathan, Rottmann, Felix Arne, Biever, Paul Marc, Supady, Alexander, Wengenmayer, Tobias, Westermann, Dirk, and Jäckel, Markus
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- 2024
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9. Exploring the impact of the inverse Faraday effect on all-optical helicity-dependent magnetization switching
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Kohlmann, M., Vollroth, L., Jäckel, K., Hovorakova, K., Schmoranzerova, E., Carva, K., Hinzke, D., Nowak, U., Münzenberg, M., and Walowski, J.
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Physics - Applied Physics - Abstract
All-optical helicity-dependent magnetization switching (AO-HDS) is the quickest deterministic technique for data storage by solely using ultrashort laser pulses. Granular high data density magnetic storage media developed for heat-assisted magnetic recording (HAMR) provide an ideal playground to investigate the interplay of effects leading to magnetization switching. In the latest perception, we identify two effects, the magnetic circular dichroism (MCD) and the inverse Faraday effect (IFE), as the forces driving the switching process. During photon absorption, which leads to a rapid temperature rise and thus to magnetization quenching, the MCD ensures two distinct electron temperatures due to helicity-dependent absorption. This effect already holds a nonvanishing probability for magnetization switching. At the same time, the IFE induces a magnetic moment within the material, enhancing the switching probability. We present AO-HDS experiments using ultrashort laser pulses ($\lesssim 200\,\mathrm{fs}$) in the near-infrared range from $800\,\mathrm{nm}$ to $1500\,\mathrm{nm}$. The experiments demonstrate a strong dependence of the switching efficiency on the absorbed energy density, elevating the electron temperature in the vicinity of the Curie point, allowing for the IFE to take full effect, inducing a magnetic moment for deterministic switching in the quenched magnetization state. While we do not observe an enhanced switching due to an increased MCD, a higher induced magnetization usually improves the switching rate if the electron temperature reaches the transition temperature vicinity. Therefore, we conclude that the magnetic moment generated by the IFE is crucial for the switching efficiency and the distinct deterministic character of the switching process. Laser pulses with a higher absorption induce a higher magnetic moment and switch magnetization at lower fluences.
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- 2024
10. Procedural safety of rotational atherectomy and modified balloon angioplasty: insights from a German national registry
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Maier, Alexander, Gissler, Mark Colin, Jäckel, Markus, Oettinger, Vera, Bacmeister, Lucas, Heidenreich, Adrian, Rilinger, Jonathan, Heger, Lukas A., Bojti, István, Weber, Christian, Wolf, Dennis, Hilgendorf, Ingo, Rahimi, Faridun, Ferenc, Miroslaw, Westermann, Dirk, Kaier, Klaus, and von zur Mühlen, Constantin
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- 2024
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11. Individual Placement and Support in der psychiatrischen Versorgung: Evaluation klinischer Routinedaten mittels eines retrospektiven Chart-Reviews
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Jäckel, Dorothea, Leopold, Karolina, and Bechdolf, Andreas
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- 2024
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12. Searching Dark Photons using displaced vertices at Belle II -- with backgrounds
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Jaeckel, Joerg and Phan, Anh Vu
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
Dark photons in the MeV to GeV range with kinetic mixing of the order of $\lesssim 10^{-4}-10^{-3}$ can be produced in significant numbers at low energy colliders such as Belle II. Their decay length can be macroscopic raising the hope for a fairly clean search via displaced vertices as proposed in Ref. [1]. However, even this is not background free. Here, we calculate and discuss problematic backgrounds from displaced photon conversion and discuss their potential impact on the sensitivity. In addition we also briefly consider the dangers of prompt backgrounds., Comment: 21 pages, 8 figures
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- 2023
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13. Small Kinetic Mixing in String Theory
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Hebecker, Arthur, Jaeckel, Joerg, and Kuespert, Ruben
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High Energy Physics - Theory ,High Energy Physics - Phenomenology - Abstract
Kinetic mixing between gauge fields of different $U(1)$ factors is a well-studied phenomenon in 4d EFT. In string compactifications with $U(1)$s from sequestered D-brane sectors, kinetic mixing becomes a key target for the UV prediction of a phenomenologically important EFT operator. Surprisingly, in many cases kinetic mixing is absent due to a non-trivial cancellation. In particular, D3-D3 kinetic mixing in type-IIB vanishes while D3-anti-D3 mixing does not. This follows both from exact CFT calculations on tori as well as from a leading-order 10d supergravity analysis, where the key cancellation is between the $C_2$ and $B_2$ contribution. We take the latter approach, which is the only one available in realistic Calabi-Yau settings, to a higher level of precision by including sub-leading terms of the brane action and allowing for non-vanishing $C_0$. The exact cancellation persists, which we argue to be the result of $SL(2,\mathbb{R})$ self-duality. We note that a $B_2C_2$ term on the D3-brane, which is often missing in the recent literature, is essential to obtain the correct zero result. Finally, allowing for $SL(2,\mathbb{R})$-breaking fluxes, kinetic mixing between D3-branes arises at a volume-suppressed level. We provide basic explicit formulae, both for kinetic as well as magnetic mixing, leaving the study of phenomenologically relevant, more complex situations for the future. We also note that describing our result in 4d supergravity appears to require higher-derivative terms - an issue which deserves further study., Comment: 43 pages, 13 figures; v2: References and more detailed discussions added
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- 2023
14. Post-LS3 Experimental Options in ECN3
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Ahdida, C., Arduini, G., Balazs, K., Bartosik, H., Bernhard, J., Boyarsky, A., Brod, J., Brugger, M., Calviani, M., Ceccucci, A., Crivellin, A., D'Ambrosio, G., De Lellis, G., Döbrich, B., Fraser, M., Ximenes, R. Franqueira, Golutvin, A., Alonso, M. Gonzalez, Goudzovski, E., Grenard, J. -L., Heeck, J., Jaeckel, J., Jacobsson, R., Kadi, Y., Kahlhoefer, F., Kling, F., Koval, M., Lanfranchi, G., Lazzeroni, C., Mahmoudi, F., Marzocca, D., Massri, K., Moulson, M., Neshatpour, S., Osborne, J., Pospelov, M., Prebibaj, T., Rabemananjara, T. R., Rembser, Ch., Rojo, J., Rozanov, A., Ruggiero, G., Rumolo, G., Schnell, G., Schott, M., Soreq, Y., Spadaro, T., Vallée, C., Zickler, T., and Zupan, J.
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High Energy Physics - Experiment ,High Energy Physics - Phenomenology - Abstract
The Experimental Cavern North 3 (ECN3) is an underground experimental cavern on the CERN Pr\'evessin site. ECN3 currently hosts the NA62 experiment, with a physics programme devoted to rare kaon decays and searches of hidden particles approved until Long Shutdown 3 (LS3). Several options are proposed on the longer term in order to make best use of the worldwide unique potential of the high-intensity/high-energy proton beam extracted from the Super Proton Synchrotron (SPS) in ECN3. The current status of their study by the CERN Physics Beyond Colliders (PBC) Study Group is presented, including considerations on beam requirements and upgrades, detector R&D and construction, schedules and cost, as well as physics potential within the CERN and worldwide landscape., Comment: 113 pages, 39 figures
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- 2023
15. Riding the dark matter wave: Novel limits on general dark photons from LISA Pathfinder
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Frerick, Jonas, Jaeckel, Joerg, Kahlhoefer, Felix, and Schmidt-Hoberg, Kai
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,General Relativity and Quantum Cosmology - Abstract
We note the possibility to perform a parametrically improved search for gauged baryon ($B$) and baryon minus lepton ($B-L$) Dark Photon Dark Matter (DPDM) using auxiliary channel data from LISA Pathfinder. In particular we use the measurement of the differential movement between the test masses (TMs) and the space craft (SC) which is nearly as sensitive as the tracking between the two TMs. TMs and SC are made from different materials and therefore have different charge-to-mass ratios for both $B-L$ and $B$. Thus, the surrounding DPDM field induces a relative acceleration of nearly constant frequency. For the case of $B-L$, we find that LISA Pathfinder can constrain previously unexplored parameter space, providing the world leading limits in the mass range $4\cdot 10^{-19}\,\text{eV}
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- 2023
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16. Terahertz conductivity mapping of thin films on smart textiles
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Jäckel, Alexander, Hupfer, Maximilian L., Castro-Camus, Enrique, Mittleman, Daniel M., Schmidl, Gabriele, Gawlik, Annett, Plentz, Jonathan, and Koch, Martin
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- 2024
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17. Reweighting and validation of the hospital frailty risk score using electronic health records in Germany: a retrospective observational study
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Kaier, Klaus, Heidenreich, Adrian, Jäckel, Markus, Oettinger, Vera, Maier, Alexander, Hilgendorf, Ingo, Breitbart, Philipp, Hartikainen, Tau, Keller, Till, Westermann, Dirk, and von zur Mühlen, Constantin
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- 2024
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18. Using Axion Miniclusters to Disentangle the Axion-photon Coupling and the Dark Matter Density
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Dandoy, Virgile, Jaeckel, Joerg, and Montoya, Valentina
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Dark matter direct (and indirect) detection experiments usually can only determine a specific combination of a power of the coupling and the dark matter density. This is also true for axion haloscopes which are sensitive to the product $g^{2}_{a\gamma\gamma}\rho_{\rm DM}$, the combination of axion-photon coupling squared and the dark matter density. In this note we show, that in the lucky case when we intersect with a so-called axion minicluster of a suitable size, we can utilize the spectral information available in haloscopes to determine the gravitational potential of the minicluster. We can then use this to measure separately the coupling and the density of the minicluster., Comment: 26 pages, 6 figures
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- 2023
19. Konsum
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Jäckel, Michael
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- 2024
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20. Cutting edge preparation of micro end mills by PVD-etching technology
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Jäckel, Christoph Paul, Meijer, Alexander Leonard, Stangier, Dominic, Lopes Dias, Nelson Filipe, Tillmann, Wolfgang, and Biermann, Dirk
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- 2024
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21. Improved decay rate in a stability theorem for hyperbolic metrics
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Jäckel, Frieder
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Mathematics - Differential Geometry ,53C20, 53C25, 57K32 - Abstract
Recently, Ursula Hamenst\"adt and the author proved a stability result for finite volume hyperbolic metrics in dimension three that does not assume any upper volume bounds, but that requires an exponentially fine control of the metric in the thin part of the manifold. We use a bootstrap argument to extend the result allowing for a weaker exponential control of the metric. This is achieved by formulating an abstract axiomatic framework., Comment: 26 pages
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- 2023
22. Axion Helioscopes as Solar Thermometers
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Hoof, Sebastian, Jaeckel, Joerg, and Thormaehlen, Lennert J.
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High Energy Physics - Phenomenology ,Astrophysics - Solar and Stellar Astrophysics - Abstract
Axions, if discovered, could serve as a powerful new messenger for studying astrophysical objects. In this study we show how the Sun's spatial and spectral "axion image" can be inverted to infer the radial dependence of solar properties in a model-independent way. In particular, the future helioscope IAXO may allow us to accurately reconstruct the Sun's temperature profile $T(r)$ in the region up to about 80% (40%) of the solar radius for an axion-photon coupling $g_{a\gamma\gamma}$ of $6 \times 10^{-11}$ GeV$^{-1}$ ($10^{-11}$ GeV$^{-1}$). The statistical fluctuations in the photon data lead to a median precision of better than 10% (16%) in this region, and the corresponding median accuracy was better than 4% (7%). While our approach can simultaneously infer the radial profile of the Debye scale $\kappa_\text{s}(r)$, its weaker connection to the axion production rate leads to median accuracy and precision of worse than 30% and 50%, respectively. We discuss possible challenges and improvements for realistic setups, as well as extensions to more general axion models. We also highlight advantages of helioscopes over neutrino detectors., Comment: 14 + 9 pages, 4 figures, v2 corresponds to the published article, code available at https://github.com/sebhoof/SolarAxionFlux
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- 2023
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23. A Quantum Perspective on Oscillation Frequencies in Axion Dark Matter Experiments
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Jaeckel, Joerg, Montoya, Valentina, and Quint, Cedric
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
In this note we look at the time evolution of signals in axion dark matter experiments from a quantum perspective. Our aim is not to contribute new results to the general discussion of the quantum/classical connection (which we do not) but rather to slightly illuminate the specific case of axion experiments. From the classical perspective one expects a signal oscillating with a frequency equal to the axion mass whose amplitude is slowly rising due to the tiny interaction of the axions with ordinary matter. In the quantum picture the latter, slow time-scale arises from the small splitting in the energy levels induced by the interaction between the axions and the experiment, and it is always present in suitable, sensitive experiments. Signals that oscillate with a frequency equal to the axion mass, however, arise from processes changing the axion number. Yet, depending on the chosen observable, such oscillations may be absent for certain special initial quantum states of the axions. However, we show by example that, using an appropriate experimental procedure, these special states can be modified by the experiment in such a way that a signal oscillating with the axion mass re-appears. In addition, we discuss the measurement of suitable correlators that feature an oscillation with the axion mass. We also comment on the connection to the classical treatment. The explicit experiment we look at is an oscillating EDM experiment such as CASPEr but we expect our results to be easily adaptable to other types of axion dark matter experiments., Comment: 30 pages, 11 figures
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- 2023
24. Terahertz conductivity mapping of thin films on smart textiles
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Alexander Jäckel, Maximilian L. Hupfer, Enrique Castro-Camus, Daniel M. Mittleman, Gabriele Schmidl, Annett Gawlik, Jonathan Plentz, and Martin Koch
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Medicine ,Science - Abstract
Abstract Smart textiles that promise to become sensors and actuators for multiple applications are an active area of research. Conductive textiles formed by coating a fabric with a conductive film will play a key role in such applications. Here we present contactless mapping of the terahertz (THz) conductivity of thin conductive films deposited on textiles. These conductivity maps enable non-destructive assessment of the conductivity of such layers and therefore the identification and localization of non-uniformities in local conductivity. The THz measurements are quantitatively consistent with four-point probe measurements of the same areas.
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- 2024
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25. Tracking axion-like particles at the LHC
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Alonso-Álvarez, Gonzalo, Jaeckel, Joerg, and Lopes, Diego D.
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
Highly boosted axion-like particles decaying into photon pairs are notoriously hard to detect at the LHC. The collimated decay photons cannot be individually reconstructed using only electromagnetic calorimeter information, making the signal less distinguishable from background. In this note we propose a search strategy to address this issue, exploiting the fact that a fraction of the decay photons convert into electron-positron pairs inside the tracking detector. The resulting tracks can be resolved with high resolution, allowing to separate the two collimated photons and resolve a displaced decay vertex. To demonstrate the effectiveness of this approach, we apply it to ALPs in the challenging MeV-GeV range produced via vector boson fusion. We find that such a search could give sensitivity to untested parameter space., Comment: 29 pages, 11 figures. Comments welcome
- Published
- 2023
26. A full transit of $\nu^2$ Lupi d and the search for an exomoon in its Hill sphere with CHEOPS
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Ehrenreich, D., Delrez, L., Akinsanmi, B., Wilson, T. G., Bonfanti, A., Beck, M., Benz, W., Hoyer, S., Queloz, D., Alibert, Y., Charnoz, S., Cameron, A. Collier, Deline, A., Hooton, M., Lendl, M., Olofsson, G., Sousa, S. G., Adibekyan, V., Alonso, R., Anglada, G., Barrado, D., Barros, S. C. C., Baumjohann, W., Beck, T., Bekkelien, A., Bergomi, M., Billot, N., Bonfils, X., Brandeker, A., Broeg, C., Bárczy, T., Berta-Thompson, Z. K., Cabrera, J., Van Damme, C. Corral, Csizmadia, S., Davies, M. B., Deleuil, M., Demangeon, O., Demory, B. -O., Doty, J. P., Erikson, A., Fausnaugh, M. M., Florén, H. G., Fortier, A., Fossati, L., Fridlund, M., Futyan, D., Gandolfi, D., Gillon, M., Guterman, P., Güdel, M., Heng, K., Isaak, K. G., Jäckel, A., Jenkins, J. M., Kiss, L. L., Laskar, J., Latham, D. W., Etangs, A. Lecavelier des, Levine, A. M., Lovis, C., Magrin, D., Maxted, P. F. L., Morgan, E. H., Nascimbeni, V., Osborn, H. P., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piotto, G., Pollacco, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Ricker, G. R., Salmon, S., Santos, N. C., Scandariato, G., Simon, A. E., Smith, A. M. S., Steinberger, M., Steller, M., Szabó, G. M., Ségransan, D., Shporer, A., Thomas, N., Tschentscher, M., Udry, S., Vanderspek, R., Van Grootel, V., and Walton, N. A.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
The planetary system around the naked-eye star $\nu^2$ Lupi (HD 136352; TOI-2011) is composed of three exoplanets with masses of 4.7, 11.2, and 8.6 Earth masses. The TESS and CHEOPS missions revealed that all three planets are transiting and have radii straddling the radius gap separating volatile-rich and volatile-poor super-earths. Only a partial transit of planet d had been covered so we re-observed an inferior conjunction of the long-period 8.6 Earth-mass exoplanet $\nu^2$ Lup d with the CHEOPS space telescope. We confirmed its transiting nature by covering its whole 9.1 h transit for the first time. We refined the planet transit ephemeris to P = 107.1361 (+0.0019/-0.0022) days and Tc = 2,459,009.7759 (+0.0101/-0.0096) BJD_TDB, improving by ~40 times on the previously reported transit timing uncertainty. This refined ephemeris will enable further follow-up of this outstanding long-period transiting planet to search for atmospheric signatures or explore the planet's Hill sphere in search for an exomoon. In fact, the CHEOPS observations also cover the transit of a large fraction of the planet's Hill sphere, which is as large as the Earth's, opening the tantalising possibility of catching transiting exomoons. We conducted a search for exomoon signals in this single-epoch light curve but found no conclusive photometric signature of additional transiting bodies larger than Mars. Yet, only a sustained follow-up of $\nu^2$ Lup d transits will warrant a comprehensive search for a moon around this outstanding exoplanet., Comment: 16 pages, 9 figures. Accepted for publication in Astronomy & Astrophysics
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- 2023
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27. Coherent Organizational States in Turbulent Pipe Flow at moderate Reynolds numbers
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Jäckel, R., Magacho, B., Owolabi, B. E., Moriconi, L., Dennis, D. J. C., and Loureiro, J. B. R.
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Physics - Fluid Dynamics - Abstract
Turbulent pipe flow is still an essentially open area of research, boosted in the last two decades by considerable progress achieved both on the experimental and numerical frontiers, mainly related to the identification and characterization of coherent structures as basic building blocks of turbulence. It has been a challenging task, however, to detect and visualize these coherent states. We address, by means of stereoscopic particle image velocimetry, that issue with the help of a large diameter (6 inches) pipe loop, which allowed us to probe for coherent states at various moderate Reynolds numbers (5300 < Re < 29000)). Although these states have been observed at flow regimes around laminar-turbulent transition (Re $\approx$ 2300) and also at high Reynolds number pipe flow (Re $\approx$ 35000), at moderate Reynolds numbers their existence had not been observed yet by experiment. By conditionally averaging the flow fields with respect to their dominant azimuthal wavenumber of streamwise velocity streaks, we have been able to uncover the existence of ten well-defined coherent flow patterns. It turns out, as a remarkable phenomenon, that their occurrence probabilities and the total number of dominant modes do not essentially change as the Reynolds number is varied. Their occurrence probabilities are noted to be reasonably well described by a Poisson distribution, which suggests that low-speed streaks are created as a Poisson process on the pipe circular geometry., Comment: 9 pages, 14 Figures
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- 2023
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28. Stochastic Model of Organizational State Transitions in a Turbulent Pipe Flow
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Jäckel, Robert, Magacho, Bruno, Owolabi, Bayode, Moriconi, Luca, Dennis, David J. C., and Loureiro, Juliana B. R.
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Physics - Fluid Dynamics - Abstract
Turbulent pipe flows exhibit organizational states (OSs) that are labelled by discrete azimuthal wavenumber modes and are reminiscent of the traveling wave solutions of low Reynolds number regimes. The discretized time evolution of the OSs, obtained through stereoscopic particle image velocimetry, is shown to be non-Markovian for data acquisition carried out at a structure-resolved sampling rate. In particular, properly defined time-correlation functions for the OS transitions are observed to decay as intriguing power laws, up to a large-eddy time horizon, beyond which they decorrelate at much faster rates. We are able to establish, relying upon a probabilistic description of the creation and annihilation of streamwise streaks, a lower-level {\it{Markovian}} model for the OS transitions, which reproduces their time-correlated behavior with meaningful accuracy. These findings indicate that the OSs are distributed along the pipe as statistically correlated packets of quasi-streamwise vortical structures., Comment: 6 pages, 7 figures
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- 2023
29. Cryptosporidium spp. in German wildlife: Detection, regional occurrence and diversity in wild boar, roe, red and fallow deer
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Claudia Jäckel, Iryna Hrushetska, Anne Mayer-Scholl, Jens A. Hammerl, Annette Johne, Carl Gremse, Denny Maaz, Karsten Nöckler, and Martin Heinrich Richter
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Sample preparation ,Nested-PCR ,Prevalence ,Detection ,Game ,Cryptosporidium ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Cryptosporidium is a cause of diarrheal infections responsible for a loss of human and animal welfare worldwide. The impact of the parasite is underestimated and the reported sources of infection are diverse, as it occurs in a wide variety of hosts. Wildlife has been reported as a notifiable source, but few studies are available on its occurrence in European wild boar and cervid species. To determine the occurrence of Cryptosporidium in game in Brandenburg, Germany, a molecular survey was conducted during the 2017 to 2020 hunting seasons. A total of 562 fecal samples from wild boar (Sus scrofa, n = 262), roe deer (Capreolus capreolus, n = 174), red deer (Cervus elaphus, n = 62), fallow deer (Dama, n = 51) and 13 samples of unspecified species were analyzed for both 18S ribosomal RNA (18S rRNA) and Cryptosporidium oocyst wall protein (COWP) gene sequence regions. PCR results showed that 21.2 % of the samples (n = 119/562) were positive for at least one target gene (18S rRNA: n = 114; COWP: n = 14), but differences in Cryptosporidium occurrence were observed within species and hunting seasons, with variations ranging from 1.8 % to 41.7 % (roe deer), respectively. Analysis of Sanger sequences of the 18S rRNA and COWP PCR products indicated that the C. sp. deer genotype was predominant in deer (roe deer: 86.7 %, red deer: 66.7 %, fallow deer: 58.8 %), while C. suis and C. scrofarum were mainly detected in wild boar (88.5 %). The human pathogenic species C. parvum was detected in only 1.2 % (n = 7) of the samples analyzed, but without a clear indication of a specific wild animal host. The highest Cryptosporidium diversity was found in wild boar and roe deer with five and four different species, respectively. Comparison of the 18S rRNA sequences with the designated reference revealed minor variations at several nucleotide positions in some isolates, possibly indicating evolutionary adaptations and the development of new subtypes. In conclusion, wildlife represents a reservoir for a diverse spectrum of Cryptosporidium species and may thus contribute to their environmental spread and the transmission to humans.
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- 2024
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30. Analyses of Healthy Lifestyle Preferences and Habits Among Generation Z University Students.
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Katalin Jäckel and Mónika Garai-Fodor
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- 2024
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31. AI as viewed by Generation Z. Advantages, Disadvantages and Challenges of AI based on Primary Findings.
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Katalin Jäckel and Mónika Garai-Fodor
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- 2024
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32. Entwicklung der Ambulantisierung
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Tillmanns, Hanna, Jäckel, Dörte, Klauber, Jürgen, editor, Wasem, Jürgen, editor, Beivers, Andreas, editor, Mostert, Carina, editor, and Scheller-Kreinsen, David, editor
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- 2024
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33. Vor, während und nach dem Rundfunk : Beobachtungen in einer medialen Sattelzeit
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Jäckel, Michael, Fromme, Johannes, Series Editor, Ganguin, Sonja, Series Editor, Iske, Stefan, Series Editor, Meister, Dorothee M., Series Editor, Sander, Uwe, Series Editor, and Kurtz, Thomas, editor
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- 2024
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34. Soil Carbon Stocks in the Brazilian Pampa: An Update
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Tornquist, Carlos Gustavo, Gamboa, Cristhian Hernandez, Andriollo, Daiane Deckmann, Reichert, José Miguel, dos Santos, Fioravante Jaeckel, Overbeck, Gerhard Ernst, editor, Pillar, Valério De Patta, editor, Müller, Sandra Cristina, editor, and Bencke, Glayson Ariel, editor
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- 2024
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35. Snowmass Cosmic Frontier Report
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Chou, Aaron S., Soares-Santos, Marcelle, Tait, Tim M. P., Adhikari, Rana X., Anchordoqui, Luis A., Annis, James, Chang, Clarence L., Cooley, Jodi, Drlica-Wagner, Alex, Fang, Ke, Flaugher, Brenna, Jaeckel, Joerg, Lippincott, W. Hugh, Miranda, Vivian, Newburgh, Laura, Newman, Jeffrey A., Prescod-Weinstein, Chanda, Rybka, Gray, Sathyaprakash, B. S., Schlegel, David J., Slatyer, Deirdre M. Shoemaker Tracy R., Slosar, Anze, Tollefson, Kirsten, Winslow, Lindley, Yu, Hai-Bo, Yu, Tien-Tien, Engel, Kristi, Gardner, Susan, Lewis, Tiffany R., Shakya, Bibhushan, and Tanedo, Phillip
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High Energy Physics - Experiment ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Instrumentation and Methods for Astrophysics ,High Energy Physics - Phenomenology - Abstract
This report summarizes the current status of Cosmic Frontier physics and the broad and exciting future prospects identified for the Cosmic Frontier as part of the 2021 Snowmass Process., Comment: 55 pages. Contribution to the 2021 Snowmass Summer Study
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- 2022
36. Probing Poincar\'e Violation
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Gupta, Rick S., Jaeckel, Joerg, and Spannowsky, Michael
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment ,High Energy Physics - Theory - Abstract
Time and space translation invariance, giving rise to energy and momentum conservation, are not only amongst the most fundamental but also the most generally accepted symmetry assumptions in physics. It is nevertheless prudent to put such assumptions to experimental and observational tests. In this note, we take the first step in this direction, specifying a simple periodic time dependence that violates time translation invariance in QED, and setting phenomenological constraints on it. In addition to observational and experimental constraints on time varying couplings, we focus on probes of violation of energy conservation such as spontaneous production of photon and electron pairs and the $e \to e \gamma$ process. We discuss similarities and differences to the discussion of time varying fundamental constants and to the case of a light bosonic dark matter field that usually also causes oscillating effects., Comment: 35 pages, 6 figures
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- 2022
37. Reweighting and validation of the hospital frailty risk score using electronic health records in Germany: a retrospective observational study
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Klaus Kaier, Adrian Heidenreich, Markus Jäckel, Vera Oettinger, Alexander Maier, Ingo Hilgendorf, Philipp Breitbart, Tau Hartikainen, Till Keller, Dirk Westermann, and Constantin von zur Mühlen
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Aged ,Machine learning ,Supervised learning ,Clinical frailty scale ,Risk adjustment ,Clinical decision making ,Geriatrics ,RC952-954.6 - Abstract
Abstract Background In the hospital setting, frailty is a significant risk factor, but difficult to measure in clinical practice. We propose a reweighting of an existing diagnoses-based frailty score using routine data from a tertiary care teaching hospital in southern Germany. Methods The dataset includes patient characteristics such as sex, age, primary and secondary diagnoses and in-hospital mortality. Based on this information, we recalculate the existing Hospital Frailty Risk Score. The cohort includes patients aged ≥ 75 and was divided into a development cohort (admission year 2011 to 2013, N = 30,525) and a validation cohort (2014, N = 11,202). A limited external validation is also conducted in a second validation cohort containing inpatient cases aged ≥ 75 in 2022 throughout Germany (N = 491,251). In the development cohort, LASSO regression analysis was used to select the most relevant variables and to generate a reweighted Frailty Score for the German setting. Discrimination is assessed using the area under the receiver operating characteristic curve (AUC). Visualization of calibration curves and decision curve analysis were carried out. Applicability of the reweighted Frailty Score in a non-elderly population was assessed using logistic regression models. Results Reweighting of the Frailty Score included only 53 out of the 109 frailty-related diagnoses and resulted in substantially better discrimination than the initial weighting of the score (AUC = 0.89 vs. AUC = 0.80, p
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- 2024
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38. Report of the Topical Group on Wave Dark Matter for Snowmass 2021
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Jaeckel, Joerg, Rybka, Gray, and Winslow, Lindley
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
There is a strong possibility that the particles making up the dark matter in the Universe have a mass below 1 eV and in many important situations exhibit a wave-like behavior. Amongst the candidates the axion stands out as particularly well motivated but other possibilities such as axion-like particles, light scalars and light vectors, should be seriously investigated with both experiments and theory. Discovery of any of these dark matter particles would be revolutionary. The wave-like nature opens special opportunities to gain precise information on the particle properties a well as astrophysical information on dark matter shortly after a first detection. To achieve these goals requires continued strong support for the next generations of axion experiments to probe significant axion parameter space this decade and to realize the vision of a definitive axion search program in the next 20 years. This needs to be complemented by strong and flexible support for a broad range of smaller experiments, sensitive to the full variety of wave-like dark matter candidates. These have their own discovery potential but can also be the test bed for future larger scale searches. Strong technological support not only allows for the optimal realization of the current and near future experiments but new technologies such as quantum measurement and control can also provide the next evolutionary jump enabling a broader and deeper sensitivity. Finally, a theory effort ranging from fundamental model building over investigating phenomenological constraints to the conception of new experimental techniques is a cornerstone of the current rapid developments in the search for wave-like dark matter and should be strengthened to have a solid foundation for the future., Comment: First arXiv version for community feedback
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- 2022
39. Complementary Semi-Deterministic Clusters for Realistic Statistical Channel Models for Positioning
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Alawieh, Mohammad, Eberlein, Ernst, Jäckel, Stephan, Franke, Norbert, Ghimire, Birendra, Feigl, Tobias, Yammine, George, and Mutschler, Christopher
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Electrical Engineering and Systems Science - Signal Processing - Abstract
Positioning benefits from channel models that capture geometric effects and, in particular, from the signal properties of the first arriving path and the spatial consistency of the propagation condition of multiple links. The models that capture the physical effects observed in a realistic deployment scenario are essential for assessing the potential benefits of enhancements in positioning methods. Channel models based on ray-tracing simulations and statistical channel models, which are current state-of-the-art methods employed to evaluate performance of positioning in 3GPP systems, do not fully capture important aspects applicable to positioning. Hence, we propose an extension of existing statistical channel models with semi-deterministic clusters (SDCs). SDCs allow channels to be simulated using three types of clusters: fixed-, specular-, and random-clusters. Our results show that the proposed model aligns with measurements obtained in a real deployment scenario. Thus, our channel models can be used to develop advanced positioning solutions based on machine learning, which enable positioning with centimeter level accuracy in NLOS and multipath scenarios., Comment: 6 pages, 10 figures
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- 2022
40. Towards Realistic Statistical Channel Models For Positioning: Evaluating the Impact of Early Clusters
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Alawieh, Mohammad, Yammine, George, Eberlein, Ernst, Ghimire, Birendra, Franke, Norbert, Jäckel, Stephan, Feigl, Tobias, and Mutschler, Christopher
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Electrical Engineering and Systems Science - Signal Processing - Abstract
Physical effects such as reflection, refraction, and diffraction cause a radio signal to arrive from a transmitter to a receiver in multiple replicas that have different amplitude and rotation. Bandwidth-limited signals, such as positioning reference signals, have a limited time resolution. In reality, the signal is often reflected in the close vicinity of a transmitter and receiver, which causes the displacement of the observed peak from the true peak expected according to the line of sight (LOS) geometry between the transmitter and receiver. In this paper, we show that the existing channel model specified for performance evaluation within 3GPP fails to model the above phenomena. As a result, the simulation results deviate significantly from the measured values. Based on our measurement and simulation results, we propose a model for incorporating the signal reflection by obstacles in the vicinity of transmitter or receiver, so that the outcome of the model corresponds to the measurement made in such scenario., Comment: 5 pages, 12 figures
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- 2022
41. Vor, während und nach dem Rundfunk
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Jäckel, Michael, primary
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- 2024
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42. Transoral laser microsurgery for supraglottic carcinomas: results of a prospective multicenter trial (SUPRATOL)
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Petra Ambrosch, Sylvia Meuret, Andreas Dietz, Asita Fazel, Rainer Fietkau, Ralf Tostmann, Ursula Schroeder, Anne Lammert, Julian Künzel, Martin C. Jäckel, Daniel Boeger, Claudia Scherl, Thomas Deitmer, Kerstin Breitenstein, K.-Wolfgang Delank, Hermann Hilber, Sarah Vester, Stephan Knipping, Ulrich Harreus, Matthias Scheich, Sylva Bartel, Stefan K. Plontke, Sven Koscielny, Johannes A. Veit, Jens Greve, Volker Schilling, Maximilian Linxweiler, Sonja Weiß, Georgios Psychogios, Christoph Arens, Claus Wittekindt, Jens Oeken, Maria Grosheva, and Christoph Borzikowsky
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transoral laser microsurgery ,supraglottic carcinoma ,functional outcomes ,FEES ,MDADI ,VHI ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
BackgroundA limited number of single institutions have published retrospective cohort studies on transoral laser microsurgery for supraglottic laryngectomy (TLM-SGL). These studies have shown that the oncologic outcomes of TLM-SGL are comparable to those of open SGL. However, there is limited information available regarding swallowing rehabilitation and quality of life (QoL).Patients and methodsSUPRATOL is a prospective, multicenter trial assessing the functional outcomes of TLM-SGL +/− adjuvant radio-(chemo)-therapy. The primary endpoint was aspiration-free swallowing at 12 months, as established using fibreoptic endoscopic evaluation of swallowing (FEES) and defined as a grade < 6 on the penetration–aspiration scale. Secondary endpoints were swallowing- and voice-related QoL, the prevalence of temporary and permanent tracheostomy and percutaneous gastrostomy, local control, laryngectomy-free survival, overall survival, and disease-free survival, as well as the influence of treatment centers on outcomes.ResultsFrom April 2015 to February 2018, 102 patients were recruited from 26 German Otorhinolaryngology (ORL) hospitals. All patients had TLM-SGL and 96.1% underwent uni- or bilateral, mostly selective neck dissection. To 47.0% of patients, adjuvant radio-(chemo)-therapy (R(C)T) was administered. The median follow-up period was 24.1 months. At 12-month follow-up, completed by 84.3% of patients, 98.2%, 95.5%, and 98.8% were free of aspiration when tested with saliva, liquid, or pulp. Adjuvant R(C)T, pT category, and type of resection had no significant influence on swallowing rehabilitation. A total of 40.2% of patients had been tracheotomized, and in 46.1% of patients, a PEG tube was inserted. At the 24-month follow-up, 5.3% of patients still required a tracheostomy, and 8.0% continued to use a percutaneous endoscopic gastrostomy (PEG) tube. Deterioration of swallowing- and voice-related QoL was observed immediately after treatment, but patients recovered, and baseline values were reached again. The Kaplan–Meier 2-year rates for local control, laryngectomy-free survival, overall survival, and disease-free survival were 88%, 92%, 93%, and 82%, respectively.ConclusionsOur prospective multicenter trial shows that, at 12 months post-TLM-SGL +/− R(C)T, 95.5%–98.8% of patients achieved aspiration-free swallowing. Morbidity was higher than previously reported. The rates of permanent tracheostomy and gastrostomy tube placement correspond to previous cohort studies. The 2-year oncologic outcomes are within the reported range.Clinical trial registrationhttps://drks.de/search/en/trial/DRKS00004641, identifier (DRKS00004641).
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- 2024
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43. Biological and genomic characterization of three psychrophilic Y. enterocolitica phages
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Jens A. Hammerl, Minh Anh Pham, Shirin El-Ahmad, Diana Manta, Claudia Jäckel, and Stefan Hertwig
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Yersinia ,phages ,application ,genome ,temperature ,Microbiology ,QR1-502 - Abstract
Yersinia (Y.) enterocolitica is an important foodborne pathogenic species that is mainly transmitted by the consumption of contaminated meat, particularly pork. To combat the bacteria along the food chain, the application of strictly lytic phages may be a promising tool. As the temperatures in the gut of animals and during food processing can differ significantly, a phage cocktail intended to be used for applications should comprise phages that are active at various temperatures. In this study, we isolated and characterized three phages with a myoviridal morphology (vB_YenM_P8, vB_YenM_P744 and vB_YenM_P778), which lysed the most important Y. enterocolitica serotypes O:3, O:9 and O:5,27 at a low multiplicity of infection (MOI) and at low temperatures down to 6°C. While vB_YenM_P8 is a member of the T4 family, vB_YenM_P744 and vB_YenM_P778 are novel phages that do not show relationship to known phages. The three phages were mixed in a cocktail with the already described phages vB_YenM_P281 and vB_YenP_Rambo. The cocktail revealed a strong lytic activity and lysed a mixture of Y. enterocolitica serotypes at room temperature (RT) within few hours with a reduction of up to 4.8 log10 units. Moreover, at even lower temperatures the mixture was significantly reduced after incubation overnight. The strongest reductions were determined at 6°C (4.0 log10 units) suggesting that the cocktail can lyse the psychrophilic Y. enterocolitica also during food processing. To determine possible phage resistance, 100 colonies that survived the infection by the phages were isolated and analysed regarding their serotype and phage susceptibility. Most isolates belonged to serotype O:9, but all of them were still sensitive to at least one phage of the cocktail.
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- 2024
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44. Stability of Einstein metrics and effective hyperbolization in large Hempel distance
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Hamenstädt, Ursula and Jäckel, Frieder
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Mathematics - Differential Geometry ,Mathematics - Geometric Topology ,53C20, 53C25, 57K32 - Abstract
Extending earlier work of Tian, we show that if a manifold admits a metric that is almost hyperbolic in a suitable sense, then there exists an Einstein metric that is close to the given metric in the $C^{2,\alpha}$-topology. In dimension $3$ the original manifold only needs to have finite volume, and the volume can be arbitrarily large. Applications include a new proof of the hyperbolization of $3$-manifolds of large Hempel distance yielding some new geometric control on the hyperbolic metric, and an analytic proof of Dehn filling and drilling that allows the filling and drilling of arbitrary many cusps and tubes., Comment: 139 pages, 1 figure. Improved writing, added details and slight change of title
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- 2022
45. High Energy Sphalerons for Baryogenesis at Low Temperatures
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Jaeckel, Joerg and Yin, Wen
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,High Energy Physics - Experiment - Abstract
We discuss baryogenesis in scenarios where the Universe is reheated to temperatures $\lesssim 100\,$GeV by the decay of long-lived massive particles into energetic SM particles. Before its thermalization, the center-of-mass energy in collisions between such a particle and a particle from the ambient plasma can be higher than the typical sphaleron mass, even if the temperature of the plasma itself is much lower. Optimistic estimates for the high energy enhancement of the sphaleron cross section suggest that successful baryogenesis is possible for reheating temperatures as low as $0.1\text{-}1\,$GeV. With a simple extension of the SM, sufficient baryon production can be achieved even if more pessimistic results for the sphaleron rate are correct. In both cases this scenario can be probed in collider and cosmic-ray experiments. We briefly discuss the possible origin of the required CP violation., Comment: 9 pages, 5 figures
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- 2022
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46. NeuRL: Closed-form Inverse Reinforcement Learning for Neural Decoding
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Kalweit, Gabriel, Kalweit, Maria, Alyahyay, Mansour, Jaeckel, Zoe, Steenbergen, Florian, Hardung, Stefanie, Brox, Thomas, Diester, Ilka, and Boedecker, Joschka
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Quantitative Biology - Neurons and Cognition - Abstract
Current neural decoding methods typically aim at explaining behavior based on neural activity via supervised learning. However, since generally there is a strong connection between learning of subjects and their expectations on long-term rewards, we propose NeuRL, an inverse reinforcement learning approach that (1) extracts an intrinsic reward function from collected trajectories of a subject in closed form, (2) maps neural signals to this intrinsic reward to account for long-term dependencies in the behavior and (3) predicts the simulated behavior for unseen neural signals by extracting Q-values and the corresponding Boltzmann policy based on the intrinsic reward values for these unseen neural signals. We show that NeuRL leads to better generalization and improved decoding performance compared to supervised approaches. We study the behavior of rats in a response-preparation task and evaluate the performance of NeuRL within simulated inhibition and per-trial behavior prediction. By assigning clear functional roles to defined neuronal populations our approach offers a new interpretation tool for complex neuronal data with testable predictions. In per-trial behavior prediction, our approach furthermore improves accuracy by up to 15% compared to traditional methods.
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- 2022
47. Impact of sedation depth on neurological outcome in post-cardiac arrest patients – A retrospective cohort study
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Staudacher, Dawid Leander, Heine, Laura, Rilinger, Jonathan, Maier, Alexander, Rottmann, Felix A., Zotzmann, Viviane, Kaier, Klaus, Biever, Paul Marc, Supady, Alexander, Westermann, Dirk, Wengenmayer, Tobias, and Jäckel, Markus
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- 2024
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48. Experimental characterization of coherent states in turbulent magnetohydrodynamic pipe flow
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Jäckel, R., Magacho, B., Owolabi, B.E., Moriconi, L., and Loureiro, J.B.R.
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- 2024
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49. Cryptosporidium spp. in German wildlife: Detection, regional occurrence and diversity in wild boar, roe, red and fallow deer
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Jäckel, Claudia, Hrushetska, Iryna, Mayer-Scholl, Anne, Hammerl, Jens A., Johne, Annette, Gremse, Carl, Maaz, Denny, Nöckler, Karsten, and Richter, Martin Heinrich
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- 2024
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50. Axion Dark Matter
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Adams, C. B., Aggarwal, N., Agrawal, A., Balafendiev, R., Bartram, C., Baryakhtar, M., Bekker, H., Belov, P., Berggren, K. K., Berlin, A., Boutan, C., Bowring, D., Budker, D., Caldwell, A., Carenza, P., Carosi, G., Cervantes, R., Chakrabarty, S. S., Chaudhuri, S., Chen, T. Y., Cheong, S., Chou, A., Co, R. T., Conrad, J., Croon, D., D'Agnolo, R. T., Demarteau, M., DePorzio, N., Descalle, M., Desch, K., Di Luzio, L., Diaz-Morcillo, A., Dona, K., Drachnev, I. S., Droster, A., Du, N., Dunne, K., Döbrich, B., Ellis, S. A. R., Essig, R., Fan, J., Foster, J. W., Fry, J. T., Rosso, A. Gallo, Barceló, J. M. García, Irastorza, I. G., Gardner, S., Geraci, A. A., Ghosh, S., Giaccone, B., Giannotti, M., Gimeno, B., Grin, D., Grote, H., Guzzetti, M., Awida, M. H., Henning, R., Hoof, S., Hoshino, G., Irsic, V., Irwin, K. D., Jackson, H., Kimball, D. F. Jackson, Jaeckel, J., Jakovcic, K., Jewell, M. J., Kagan, M., Kahn, Y., Khatiwada, R., Knirck, S., Kovachy, T., Krueger, P., Kuenstner, S. E., Kurinsky, N. A., Leane, R. K., Leder, A. F., Lee, C., Lehnert, K. W., Lentz, E. W., Lewis, S. M., Liu, J., Lynn, M., Majorovits, B., Marsh, D. J. E., Maruyama, R. H., McAllister, B. T., Millar, A. J., Miller, D. W., Mitchell, J., Morampudi, S., Mueller, G., Nagaitsev, S., Nardi, E., Noroozian, O., O'Hare, C. A. J., Oblath, N. S., Ouellet, J. L., Pappas, K. M. W., Peiris, H. V., Perez, K., Phipps, A., Pivovaroff, M. J., Quílez, P., Rapidis, N. M., Robles, V. H., Rogers, K. K., Rudolph, J., Ruz, J., Rybka, G., Safdari, M., Safdi, B. R., Safronova, M. S., Salemi, C. P., Schuster, P., Schwartzman, A., Shu, J., Simanovskaia, M., Singh, J., Singh, S., Sinha, K., Sinnis, J. T., Siodlaczek, M., Smith, M. S., Snow, W. M., Sokolov, A. V., Sonnenschein, A., Speller, D. H., Stadnik, Y. V., Sun, C., Sushkov, A. O., Tait, T. M. P., Takhistov, V., Tanner, D. B., Tavecchio, F., Temples, D. J., Thomas, J. H., Tobar, M. E., Toro, N., Tsai, Y. -D., van Assendelft, E. C., van Bibber, K., Vandegar, M., Visinelli, L., Vitagliano, E., Vogel, J. K., Wang, Z., Wickenbrock, A., Winslow, L., Withington, S., Wooten, M., Yang, J., Young, B. A., Yu, F., Zhou, K., and Zhou, T.
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High Energy Physics - Experiment ,Astrophysics - Cosmology and Nongalactic Astrophysics ,High Energy Physics - Phenomenology ,Physics - Instrumentation and Detectors - Abstract
Axions are well-motivated dark matter candidates with simple cosmological production mechanisms. They were originally introduced to solve the strong CP problem, but also arise in a wide range of extensions to the Standard Model. This Snowmass white paper summarizes axion phenomenology and outlines next-generation laboratory experiments proposed to detect axion dark matter. There are vibrant synergies with astrophysical searches and advances in instrumentation including quantum-enabled readout, high-Q resonators and cavities and large high-field magnets. This white paper outlines a clear roadmap to discovery, and shows that the US is well-positioned to be at the forefront of the search for axion dark matter in the coming decade., Comment: restore and expand author list
- Published
- 2022
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