Author: "Witte, S." - Searchworks@Jio Institute Digital Library Search Results

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1,497 results on '"Witte, S."'

1. Generalized Ray Tracing for Axions in Astrophysical Plasmas

Author: McDonald, J. I. and Witte, S. J.
Subjects: High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Ray tracing plays a vital role in black hole imaging, modeling the emission mechanisms of pulsars, and deriving signatures from physics beyond the Standard Model. In this work we focus on one specific application of ray tracing, namely, predicting radio signals generated from the resonant conversion of axion dark matter in the strongly magnetized plasma surrounding neutron stars. The production and propagation of low-energy photons in these environments are sensitive to both the anisotropic response of the background plasma and curved spacetime; here, we employ a fully covariant framework capable of treating both effects. We implement this both via forward and backward ray tracing. In forward ray tracing, photons are sampled at the point of emission and propagated to infinity, whilst in the backward-tracing approach, photons are traced backwards from an image plane to the point of production. We explore various approximations adopted in prior work, quantifying the importance of gravity, plasma anisotropy, the neutron star mass and radius, and imposing the proper kinematic matching of the resonance. Finally, using a more realistic model for the charge distribution of magnetar magnetospheres, we revisit the sensitivity of current and future radio and sub-mm telescopes to spectral lines emanating from the Galactic Center Magnetar, showing such observations may extend sensitivity to axion masses $m_a \sim \mathcal{O}({\rm few}) \times 10^{-3}$ eV, potentially even probing parameter space of the QCD axion., Comment: v2: Updated to match published version. v1: 25 pages, 14 figures. Comments welcome
Published: 2023

2. Detecting the Stimulated Decay of Axions at Radio Frequencies

Author: Caputo, A., Regis, M., Taoso, M., and Witte, S. J.
Subjects: High Energy Physics - Phenomenology, Astrophysics - Astrophysics of Galaxies
Abstract: Assuming axion-like particles account for the entirety of the dark matter in the Universe, we study the possibility of detecting their decay into photons at radio frequencies. We discuss different astrophysical targets, such as dwarf spheroidal galaxies, the Galactic Center and halo, and galaxy clusters. The presence of an ambient radiation field leads to a stimulated enhancement of the decay rate; depending on the environment and the mass of the axion, the effect of stimulated emission may amplify the photon flux by serval orders of magnitude. For axion-photon couplings allowed by astrophysical and laboratory constraints(and possibly favored by stellar cooling), we find the signal to be within the reach of next-generation radio telescopes such as the Square Kilometer Array., Comment: Minor changes, references added, matches published version
Published: 2018
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3. Diffractive shear interferometry for extreme ultraviolet high-resolution lensless imaging

Author: Jansen, G. S. M., de Beurs, A. C. C., Liu, X., Eikema, K. S. E., and Witte, S.
Subjects: Physics - Optics
Abstract: We demonstrate a novel imaging approach and associated reconstruction algorithm for far-field coherent diffractive imaging, based on the measurement of a pair of laterally sheared diffraction patterns. The differential phase profile retrieved from such a measurement leads to improved reconstruction accuracy, increased robustness against noise, and faster convergence compared to traditional coherent diffractive imaging methods. We measure laterally sheared diffraction patterns using Fourier-transform spectroscopy with two phase-locked pulse pairs from a high harmonic source. Using this approach, we demonstrate spectrally resolved imaging at extreme ultraviolet wavelengths between 28 and 35 nm.
Published: 2018
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4. Spectrally resolved single-shot wavefront sensing of broadband high-harmonic sources

Author: Freisem, L., Jansen, G. S. M., Rudolf, D., Eikema, K. S. E., and Witte, S.
Subjects: Physics - Instrumentation and Detectors, Physics - Applied Physics, Physics - Optics
Abstract: Wavefront sensors are an important tool to characterize coherent beams of extreme ultraviolet radiation. However, conventional Hartmann-type sensors do not allow for independent wavefront characterization of different spectral components that may be present in a beam, which limits their applicability for intrinsically broadband high-harmonic generation (HHG) sources. Here we introduce a wavefront sensor that measures the wavefronts of all the harmonics in a HHG beam in a single camera exposure. By replacing the mask apertures with transmission gratings at different orientations, we simultaneously detect harmonic wavefronts and spectra, and obtain sensitivity to spatiotemporal structure such as pulse front tilt as well. We demonstrate the capabilities of the sensor through a parallel measurement of the wavefronts of 9 harmonics in a wavelength range between 25 and 49 nm, with up to lambda/32 precision., Comment: 12 pages, 6 figures
Published: 2017
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5. Ion distribution and ablation depth measurements of a fs-ps laser-irradiated solid tin target

Author: Deuzeman, M J, Stodolna, A S, Leerssen, E E B, Antoncecchi, A, Spook, N, Kleijntjens, T, Versluis, J, Witte, S, Eikema, K S E, Ubachs, W, Hoekstra, R, and Versolato, O O
Subjects: Physics - Plasma Physics
Abstract: The ablation of solid tin surfaces by an 800-nanometer-wavelength laser is studied for a pulse length range from 500 fs to 4.5 ps and a fluence range spanning 0.9 to 22 J/cm^2. The ablation depth and volume are obtained employing a high-numerical-aperture optical microscope, while the ion yield and energy distributions are obtained from a set of Faraday cups set up under various angles. We found a slight increase of the ion yield for an increasing pulse length, while the ablation depth is slightly decreasing. The ablation volume remained constant as a function of pulse length. The ablation depth follows a two-region logarithmic dependence on the fluence, in agreement with the available literature and theory. In the examined fluence range, the ion yield angular distribution is sharply peaked along the target normal at low fluences but rapidly broadens with increasing fluence. The total ionization fraction increases monotonically with fluence to a 5-6% maximum, which is substantially lower than the typical ionization fractions obtained with nanosecond-pulse ablation. The angular distribution of the ions does not depend on the laser pulse length within the measurement uncertainty. These results are of particular interest for the possible utilization of fs-ps laser systems in plasma sources of extreme ultraviolet light for nanolithography., Comment: 8 pages, 7 figures
Published: 2017

6. Spatially Resolved Fourier Transform Spectroscopy in the Extreme Ultraviolet

Author: Jansen, G. S. M., Rudolf, D., Freisem, L., Eikema, K. S. E., and Witte, S.
Subjects: Physics - Optics
Abstract: Coherent extreme ultraviolet (XUV) radiation produced by table-top high-harmonic generation (HHG) sources provides a wealth of possibilities in research areas ranging from attosecond physics to high resolution coherent imaging. However, it remains challenging to fully exploit the coherence of such sources for interferometry and Fourier transform spectroscopy (FTS). This is due to the need for a measurement system that is stable at the level of a wavelength fraction, yet allowing a controlled scanning of time delays. Here we demonstrate XUV interferometry and FTS in the 17-55 nm wavelength range using an ultrastable common-path interferometer suitable for high-intensity laser pulses that drive the HHG process. This approach enables the generation of fully coherent XUV pulse pairs with sub-attosecond timing variation, tunable time delay and a clean Gaussian spatial mode profile. We demonstrate the capabilities of our XUV interferometer by performing spatially resolved FTS on a thin film composed of titanium and silicon nitride., Comment: 10 pages, 5 figures
Published: 2016
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7. Direct Imaging discovery of a second planet candidate around the possibly transiting planet host CVSO 30

Author: Schmidt, T. O. B., Neuhäuser, R., Briceño, C., Vogt, N., Raetz, St., Seifahrt, A., Ginski, C., Mugrauer, M., Buder, S., Adam, C., Hauschildt, P. H., Witte, S., Helling, Ch., and Schmitt, J. H. M. M.
Subjects: Astrophysics - Earth and Planetary Astrophysics
Abstract: We surveyed the 25 Ori association for direct-imaging companions. This association has an age of only few million years. Among other targets, we observed CVSO 30, which has recently been identified as the first T Tauri star found to host a transiting planet candidate. We report on photometric and spectroscopic high-contrast observations with the Very Large Telescope, the Keck telescopes, and the Calar Alto observatory. They reveal a directly imaged planet candidate close to the young M3 star CVSO 30. The JHK-band photometry of the newly identified candidate is at better than 1 sigma consistent with late-type giants, early-T and early-M dwarfs, and free-floating planets. Other hypotheses such as galaxies can be excluded at more than 3.5 sigma. A lucky imaging z' photometric detection limit z'= 20.5 mag excludes early-M dwarfs and results in less than 10 MJup for CVSO 30 c if bound. We present spectroscopic observations of the wide companion that imply that the only remaining explanation for the object is that it is the first very young (< 10 Myr) L-T-type planet bound to a star, meaning that it appears bluer than expected as a result of a decreasing cloud opacity at low effective temperatures. Only a planetary spectral model is consistent with the spectroscopy, and we deduce a best-fit mass of 4-5 Jupiter masses (total range 0.6-10.2 Jupiter masses). This means that CVSO 30 is the first system in which both a close-in and a wide planet candidate are found to have a common host star. The orbits of the two possible planets could not be more different: they have orbital periods of 10.76 hours and about 27000 years. The two orbits may have formed during a mutual catastrophic event of planet-planet scattering., Comment: 15 pages, 16 figures, accepted for publication in A&A
Published: 2016
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8. Pairing in high-density neutron matter including short- and long-range correlations

Author: Ding, D., Rios, A., Dussan, H., Dickhoff, W. H., Witte, S. J., Carbone, A., and Polls, A.
Subjects: Nuclear Theory
Abstract: Pairing gaps in neutron matter need to be computed in a wide range of densities to address open questions in neutron star phenomenology. Traditionally, the Bardeen-Cooper-Schrieffer approach has been used to compute gaps from bare nucleon-nucleon interactions. Here, we incorporate the influence of short- and long-range correlations in the pairing gaps. Short-range correlations are treated including the appropriate fragmentation of single-particle states, and substantially suppress the gaps. Long-range correlations dress the pairing interaction via density and spin modes, and provide a relatively small correction. We use different interactions, some with three-body forces, as a starting point to control for any systematic effects. Results are relevant for neutron-star cooling scenarios, in particular in view of the recent observational data on Cassiopeia A., Comment: Final published version. 18 pages, 14 figures, 2 tables. Includes preliminary comments and figure on three-neutron force effects
Published: 2016
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9. Nanosecond laser ablation threshold of liquid tin microdroplets

Author: Meijer, R. A., Kurilovich, D., Liu, B., Mazzotta, Z., Hernandez-Rueda, J., Versolato, O. O., and Witte, S.
Published: 2022
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10. Warum eine 'Wasserwende' in Deutschland zwingend notwendig ist

Author: Ammermüller, B., Münch, R., Schulz von Thun, F., Wagner, C., Witte, S., Borchardt, Dietrich, Ammermüller, B., Münch, R., Schulz von Thun, F., Wagner, C., Witte, S., and Borchardt, Dietrich
Published: 2024

11. Trends in mortality in people with HIV from 1999 to 2020: a multi-cohort collaboration

Author: Tusch, E, Ryom, L, Pelchen-Matthews, A, Mocroft, A, Elbirt, D, Oprea, C, Günthard, H, Staehelin, C, Zangerle, R, Suarez, I, Vehreschild, J, Wit, F, Menozzi, M, d'Arminio Monforte, A, Spagnuolo, V, Pradier, C, Carlander, C, Suanzes, P, Wasmuth, J, Carr, A, Petoumenos, K, Borgans, F, Bonnet, F, De Wit, S, El-Sadr, W, Neesgaard, B, Jaschinski, N, Greenberg, L, Hosein, S, Gallant, J, Vannappagari, V, Young, L, Sabin, C, Lundgren, J, Peters, L, Reekie, J, Calvo, G, Dabis, F, Kirk, O, Law, M, Monforte, A, Morfeldt, L, Reiss, P, Weber, R, Lind-Thomsen, A, Brandt, R, Hillebreght, M, Zaheri, S, Scherrer, A, Schöni-Affolter, F, Rickenbach, M, Tavelli, A, Fanti, I, Leleux, O, Mourali, J, Marec, F, Boerg, E, Thulin, E, Sundström, A, Bartsch, G, Thompsen, G, Necsoi, C, Delforge, M, Fontas, E, Caissotti, C, Dollet, K, Mateu, S, Torres, F, Blance, A, Huang, R, Puhr, R, Laut, K, Kristensen, D, Phillips, A, Kamara, D, Smith, C, Hatleberg, C, Raben, D, Matthews, C, Bojesen, A, Grevsen, A, Powderly, B, Shortman, N, Moecklinghoff, C, Reilly, G, Franquet, X, Smit, C, Ross, M, Fux, C, Morlat, P, Friis-Møller, N, Kowalska, J, Bohlius, J, Bower, M, Fätkenheuer, G, Grulich, A, Sjøl, A, Meidahl, P, Iversen, J, Reiss, C, Hillebregt, M, Prins, J, Kuijpers, T, Scherpbier, H, van der Meer, J, Godfried, M, van der Poll, T, Nellen, F, Geerlings, S, van Vugt, M, Pajkrt, D, Bos, J, Wiersinga, W, van der Valk, M, Goorhuis, A, Hovius, J, van Eden, J, Henderiks, A, van Hes, A, Mutschelknauss, M, Nobel, H, Pijnappel, F, Jurriaans, S, Back, N, Zaaijer, H, Berkhout, B, Cornelissen, M, Schinkel, C, Thomas, X, Ziekenhuis, A, van den Berge, M, Stegeman, A, Baas, S, de Looff, L, Versteeg, D, Ziekenhuis, C, Pronk, M, Ammerlaan, H, De Munnik, E, Jansz, A, Tjhie, J, Wegdam, M, Deiman, B, Scharnhorst, V, van der Plas, A, Weijsenfeld, A, van der Ende, M, De Vries-Sluijs, T, van Gorp, E, Schurink, C, Nouwen, J, Verbon, A, Rijnders, B, Bax, H, van der Feltz, M, Bassant, N, van Beek, J, Vriesde, M, van Zonneveld, L, de Oude-Lubbers, A, van den Berg-Cameron, H, Bruinsma-Broekman, F, de Groot, J, de Man, M, Boucher, C, Koopmans, M, van Kampen, J, Pas, S, Mc–sophia, E, Driessen, G, van Rossum, A, van der Knaap, L, Visser, E, Branger, J, Rijkeboer-Mes, A, de Ven, C, Ziekenhuis, H, Schippers, E, van Nieuwkoop, C, van IJperen, J, Geilings, J, van der Hut, G, Franck, P, van Eeden, A, Brokking, W, Groot, M, Elsenburg, L, Damen, M, Kwa, I, Groeneveld, P, Bouwhuis, J, van den Berg, J, van Hulzen, A, van der Bliek, G, Bor, P, Bloembergen, P, Wolfhagen, M, Ruijs, G, Kroon, F, de Boer, M, Bauer, M, Jolink, H, Vollaard, A, Dorama, W, van Holten, N, Claas, E, Wessels, E, den Hollander, J, Pogany, K, Roukens, A, Kastelijns, M, Smit, J, Smit, E, Struik-Kalkman, D, Tearno, C, Bezemer, M, van Niekerk, T, Pontesilli, O, Lowe, S, Lashof, A, Posthouwer, D, Ackens, R, Schippers, J, Vergoossen, R, Weijenberg-Maes, B, van Loo, I, Havenith, T, Leyten, E, Gelinck, L, van Hartingsveld, A, Meerkerk, C, Wildenbeest, G, Mutsaers, J, Jansen, C, Mulder, J, Vrouenraets, S, Lauw, F, van Broekhuizen, M, Paap, H, Vlasblom, D, Smits, P, Zuiderzee, M, Weijer, S, El Moussaoui, R, Bosma, A, van Vonderen, M, van Houte, D, Kampschreur, L, Dijkstra, K, Faber, S, Weel, J, Kootstra, G, Delsing, C, van der Burg-van de Plas, M, Heins, H, Lucas, E, Kortmann, W, van Twillert, G, Stuart, J, Diederen, B, Pronk, D, van Truijen-Oud, F, van der Reijden, W, Jansen, R, Brinkman, K, van den Berk, G, Blok, W, Frissen, P, Lettinga, K, Schouten, W, Veenstra, J, Brouwer, C, Geerders, G, Hoeksema, K, Kleene, M, van der Meché, I, Spelbrink, M, Sulman, H, Toonen, A, Wijnands, S, Kwa, D, Witte, E, Koopmans, P, Keuter, M, van der Ven, A, ter Hofstede, H, Dofferhoff, A, van Crevel, R, Albers, M, Bosch, M, Grintjes-Huisman, K, Zomer, B, Stelma, F, Rahamat-Langendoen, J, Burger, D, Richter, C, Gisolf, E, Hassing, R, ter Beest, G, van Bentum, P, Langebeek, N, Tiemessen, R, Swanink, C, van Lelyveld, S, Soetekouw, R, Hulshoff, N, van der Prijt, L, van der Swaluw, J, Bermon, N, Herpers, B, Veenendaal, D, Verhagen, D, van Wijk, M, Ziekenhuis, S, van Kasteren, M, Brouwer, A, de Wiel, B, Kuipers, M, Santegoets, R, van der Ven, B, Marcelis, J, Buiting, A, Kabel, P, Bierman, W, Scholvinck, H, Wilting, K, Stienstra, Y, Jonge, H, van der Meulen, P, de Weerd, D, Ludwig-Roukema, J, Niesters, H, Riezebos-Brilman, A, van Leer-Buter, C, Knoester, M, Hoepelman, A, Mudrikova, T, Ellerbroek, P, Oosterheert, J, Arends, J, Barth, R, Wassenberg, M, Schadd, E, van Elst-Laurijssen, D, van Oers-Hazelzet, E, Vervoort, S, van Berkel, M, Schuurman, R, Verduyn-Lunel, F, Wensing, A, Peters, E, van Agtmael, M, Bomers, M, de Vocht, J, Heitmuller, M, Laan, L, Pettersson, A, Vandenbroucke-Grauls, C, Ang, C, Kinderziekenhuis, W, Geelen, S, Wolfs, T, Bont, L, Nauta, N, Bezemer, D, van Sighem, A, Boender, T, de Jong, A, Bergsma, D, Hoekstra, P, de Lang, A, Grivell, S, Jansen, A, Rademaker, M, Raethke, M, Meijering, R, Schnörr, S, de Groot, L, van den Akker, M, Bakker, Y, Claessen, E, El Berkaoui, A, Koops, J, Kruijne, E, Lodewijk, C, Munjishvili, L, Peeck, B, Ree, C, Regtop, R, Ruijs, Y, Rutkens, T, van de Sande, L, Schoorl, M, Timmerman, A, Tuijn, E, Veenenberg, L, van der Vliet, S, Wisse, A, Woudstra, T, Tuk, B, Dupon, M, Gaborieau, V, Lacoste, D, Malvy, D, Mercié, P, Neau, D, Pellegrin, J, Tchamgoué, S, Lazaro, E, Cazanave, C, Vandenhende, M, Vareil, M, Gérard, Y, Blanco, P, Bouchet, S, Breilh, D, Fleury, H, Pellegrin, I, Chêne, G, Thiébaut, R, Wittkop, L, Lawson-Ayayi, S, Gimbert, A, Desjardin, S, Lacaze-Buzy, L, Petrov-Sanchez, V, André, K, Bernard, N, Caubet, O, Caunegre, L, Chossat, I, Courtault, C, Dauchy, F, De Witte, S, Dondia, D, Duffau, P, Dutronc, H, Farbos, S, Faure, I, Ferrand, H, Gerard, Y, Greib, C, Hessamfar, M, Imbert, Y, Lataste, P, Marie, J, Mechain, M, Monlun, E, Ochoa, A, Pistone, T, Raymond, I, Receveur, M, Rispal, P, Sorin, L, Valette, C, Viallard, J, Wille, H, Wirth, G, Lafon, M, Trimoulet, P, Bellecave, P, Tumiotto, C, Haramburu, F, Miremeont-Salamé, G, Blaizeau, M, Decoin, M, Hannapier, C, Lenaud, E, Pougetoux, A, Delveaux, S, D’Ivernois, C, Diarra, F, Uwamaliya-Nziyumvira, B, Palmer, G, Conte, V, Sapparrart, V, Law, C, Moore, R, Edwards, S, Hoy, J, Watson, K, Roth, N, Lau, H, Bloch, M, Baker, D, Cooper, D, O’Sullivan, M, Nolan, D, Guelfi, G, Calvo, C, Domingo, P, Sambeat, M, Gatell, J, Del Cacho, E, Cadafalch, J, Fuster, M, Codina, C, Sirera, G, Vaqué, A, Clumeck, N, Gennotte, A, Gerard, M, Kabeya, K, Konopnicki, D, Libois, A, Martin, C, Payen, M, Semaille, P, Van Laethem, Y, Neaton, C, Krum, E, Thompson, G, Wentworth, D, Luskin-Hawk, R, Telzak, E, Abrams, D, Cohn, D, Markowitz, N, Arduino, R, Mushatt, D, Friedland, G, Perez, G, Tedaldi, E, Fisher, E, Gordin, F, Crane, L, Sampson, J, Baxter, J, Gazzard, B, Horban, A, Karpov, I, Losso, M, Pedersen, C, Ristola, M, Rockstroh, J, Fischer, A, Larsen, J, Podlekareva, D, Cozzi-Lepri, A, Shepherd, L, Schultze, A, Amele, S, Kundro, M, Schmied, B, Wien, P, Vassilenko, A, Mitsura, V, Paduto, D, Florence, E, Vandekerckhove, L, Hadziosmanovic, V, Begovac, J, Machala, L, Jilich, D, Sedlacek, D, Kronborg, G, Benfield, T, Gerstoft, J, Katzenstein, T, Møller, N, Ostergaard, L, Wiese, L, Nielsen, L, Zilmer, K, Smidt, J, Siseklinik, N, Aho, I, Viard, J, Duvivier, C, Schmidt, R, Degen, O, Stellbrink, H, Stefan, C, Goethe, J, Bogner, J, Chkhartishvili, N, Gargalianos, P, Xylomenos, G, Armenis, K, Sambatakou, H, Szlávik, J, Gottfredsson, M, Mulcahy, F, Yust, I, Turner, D, Burke, M, Shahar, E, Hassoun, G, Elinav, H, Haouzi, M, Sthoeger, Z, Esposito, R, Mazeu, I, Mussini, C, Mazzotta, F, Gabbuti, A, Annunziata, O, Vullo, V, Lichtner, M, Zaccarelli, M, Antinori, A, Acinapura, R, Plazzi, M, Lazzarin, A, Castagna, A, Gianotti, N, Galli, M, Ridolfo, A, Rozentale, B, Uzdaviniene, V, Matulionyte, R, Staub, T, Hemmer, R, Ormaasen, V, Maeland, A, Bruun, J, Knysz, B, Gasiorowski, J, Inglot, M, Bakowska, E, Flisiak, R, Grzeszczuk, A, Parczewski, M, Maciejewska, K, Aksak-Was, B, Beniowski, M, Mularska, E, Smiatacz, T, Gensing, M, Jablonowska, E, Malolepsza, E, Wojcik, K, Mozer-Lisewska, I, Caldeira, L, Mansinho, K, Maltez, F, Radoi, R, Panteleev, A, Panteleev, O, Yakovlev, A, Trofimora, T, Khromova, I, Kuzovatova, E, Blokhina, I, Novogrod, N, Borodulina, E, Vdoushkina, E, Jevtovic, D, Tomazic, J, Miró, J, Moreno, S, Rodriguez, J, Clotet, B, Jou, A, Paredes, R, Tural, C, Puig, J, Bravo, I, Gutierrez, M, Mateo, G, Laporte, J, Sonnerborg, A, Brännström, I, Flamholc, L, Cavassini, M, Calmy, A, Furrer, H, Battegay, M, Schmid, P, Kuznetsova, A, Kyselyova, G, Sluzhynska, M, Johnson, A, Simons, E, Johnson, M, Orkin, C, Weber, J, Scullard, G, Clarke, A, Leen, C, Morfeldt, C, Thulin, G, Åkerlund, B, Koppel, K, Karlsson, A, Håkangård, C, Castelli, F, Cauda, R, Perri, G, Iardino, R, Ippolito, G, Marchetti, G, Perno, C, von Schloesser, F, Viale, P, Ceccherini-Silberstein, F, Girardi, E, Caputo, S, Puoti, M, Andreoni, M, Ammassari, A, Balotta, C, Bandera, A, Bonfanti, P, Bonora, S, Borderi, M, Calcagno, A, Calza, L, Capobianchi, M, Cingolani, A, Cinque, P, De Luca, A, Biagio, A, Gori, A, Guaraldi, G, Lapadula, G, Madeddu, G, Maggiolo, F, Marcotullio, S, Monno, L, Nozza, S, Roldan, E, Rossotti, R, Rusconi, S, Santoro, M, Saracino, A, Galli, L, Lorenzini, P, Rodano, A, Shanyinde, M, Carletti, F, Carrara, S, Caro, A, Graziano, S, Petrone, F, Prota, G, Quartu, S, Truffa, S, Giacometti, A, Costantini, A, Barocci, V, Angarano, G, Santoro, C, Suardi, C, Donati, V, Verucchi, G, Minardi, C, Quirino, T, Abeli, C, Manconi, P, Piano, P, Cacopardo, B, Celesia, B, Vecchiet, J, Falasca, K, Pan, A, Lorenzotti, S, Sighinolfi, L, Segala, D, Vichi, F, Cassola, G, Viscoli, C, Alessandrini, A, Bobbio, N, Mazzarello, G, Mastroianni, C, Belvisi, V, Caramma, I, Chiodera, A, Milini, P, Rizzardini, G, Moioli, M, Piolini, R, Salpietro, S, Tincati, C, Puzzolante, C, Abrescia, N, Chirianni, A, Borgia, G, Orlando, R, Bonadies, G, Martino, F, Gentile, I, Maddaloni, L, Cattelan, A, Marinello, S, Cascio, A, Colomba, C, Baldelli, F, Schiaroli, E, Parruti, G, Sozio, F, Magnani, G, Ursitti, M, Cristaudo, A, Baldin, G, Capozzi, M, Cicalini, S, Sulekova, L, Iaiani, G, Latini, A, Mastrorosa, I, Savinelli, S, Vergori, A, Cecchetto, M, Viviani, F, Bagella, P, Rossetti, B, Franco, A, Del Vecchio, R, Francisci, D, Giuli, C, Caramello, P, Orofino, G, Sciandra, M, Bassetti, M, Londero, A, Pellizzer, G, Manfrin, V, Starnini, G, Ialungo, A, Central, C, Dellamonica, P, Bernard, E, Courjon, J, Cua, E, De Salvador-Guillouet, F, Durant, J, Etienne, C, Ferrando, S, Mondain-Miton, V, Naqvi, A, Perbost, I, Pillet, S, Prouvost-Keller, B, Pugliese, P, Rio, V, Risso, K, Roger, P, Aubert, V, Bernasconi, E, Böni, J, Braun, D, Bucher, H, Ciuffi, A, Dollenmaier, G, Egger, M, Elzi, L, Fehr, J, Fellay, J, Haerry, D, Hasse, B, Hirsch, H, Hoffmann, M, Hösli, I, Kahlert, C, Kaiser, L, Keiser, O, Klimkait, T, Kouyos, R, Kovari, H, 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Huldrych F, Staehelin, Cornelia, Zangerle, Robert, Suarez, Isabelle, Vehreschild, Jörg Janne, Wit, Ferdinand, Menozzi, Marianna, d'Arminio Monforte, Antonella, Spagnuolo, Vincenzo, Pradier, Christian, Carlander, Christina, Suanzes, Paula, Wasmuth, Jan-Christian, Carr, Andrew, Petoumenos, Kathy, Borgans, Frauke, Bonnet, Fabrice, De Wit, Stephane, El-Sadr, Wafaa, Neesgaard, Bastian, Jaschinski, Nadine, Greenberg, Lauren, Hosein, Sean R, Gallant, Joel, Vannappagari, Vani, Young, Lital, Sabin, Caroline, Lundgren, Jens, Peters, Lars, Reekie, Joanne, Monforte, A d’Arminio, Brandt, R Salbøl, Wit, F W N M, Marec, F Le, Laut, K Grønborg, Sabin, C A, Phillips, A N, Kamara, D A, Smith, C J, Hatleberg, C I, Brandt, R S, Grevsen, A L, Lundgren, J D, Fux, C A, Monforte, A d'Arminio, Iversen, J S, Reiss, Central P, Prins, J M, Kuijpers, T W, Scherpbier, H J, van der Meer, J T M, Godfried, M H, Nellen, F J B, Geerlings, S E, Bos, J C, Wiersinga, W J, Hovius, J W, van Hes, A M H, Nobel, H E, Pijnappel, F J J, Back, N K T, Zaaijer, H L, Cornelissen, M T E, Schinkel, C J, Thomas, X V, Ziekenhuis, Admiraal De Ruyter, de Looff, L Hage, Ziekenhuis, Catharina, Pronk, M J H, Ammerlaan, H S M, De Munnik, E S, Jansz, A R, Wegdam, M C A, Weijsenfeld, A M, van der Ende, M E, De Vries-Sluijs, T E M S, van Gorp, E C M, Schurink, C A M, Nouwen, J L, Rijnders, B J A, Bax, H I, van Beek, J E A, van Zonneveld, L M, van den Berg-Cameron, H J, Bruinsma-Broekman, F B, de Man, M de Zeeuw, Boucher, C A B, Koopmans, M P G, van Kampen, J J A, Pas, S D, MC–Sophia, Erasmus, Driessen, G J A, van Rossum, A M C, van der Knaap, L C, de Ven, C J H M Duijf-van, Ziekenhuis, Haga, Schippers, E F, van IJperen, J M, Franck, P F H, Elsenburg, L J M, Kwa, I S, Groeneveld, P H P, Bouwhuis, J W, van den Berg, J F, van Hulzen, A G W, van der Bliek, G L, Bor, P C J, Wolfhagen, M J H M, Ruijs, G J H M, Kroon, F P, de Boer, M G J, Bauer, M P, Vollaard, A M, Claas, E C J, den Hollander, J G, Smit, J V, Lowe, S H, Lashof, A M L Oude, Ackens, R P, van Loo, I H M, Havenith, T R A, Leyten, E M S, Gelinck, L B S, Wildenbeest, G S, Mutsaers, J A E M, Jansen, C L, Mulder, J W, Vrouenraets, S M E, Lauw, F N, van Broekhuizen, M C, Vlasblom, D J, Smits, P H M, Zuiderzee, M C, Bosma, A S, van Vonderen, M G A, van Houte, D P F, Kampschreur, L M, Kootstra, G J, Delsing, C E, Stuart, J W T Cohen, Diederen, B M W, van Truijen-Oud, F A, van der Reijden, W A, van den Berk, G E L, Blok, W L, Frissen, P H J, Lettinga, K D, Schouten, W E M, Brouwer, C J, Geerders, G F, Kleene, M J, van der Meché, I B, Toonen, A J M, Koopmans, P P, van der Ven, A J A M, ter Hofstede, H J M, Dofferhoff, A S M, Bosch, M E W, Grintjes-Huisman, K J T, Zomer, B J, Stelma, F F, Gisolf, E H, Hassing, R J, van Bentum, P H M, Swanink, C M A, van Lelyveld, S F L, van der Prijt, L M M, Herpers, B L, Verhagen, D W M, Ziekenhuis, St Elisabeth, van Kasteren, M E E, Brouwer, A E, de Wiel, B A F M de Kruijf-van, Santegoets, R M W J, Marcelis, J H, Buiting, A G M, Kabel, P J, Bierman, W F W, Wilting, K R, Jonge, H de Groot-de, van der Meulen, P A, de Weerd, D A, Niesters, H G M, van Leer-Buter, C C, Hoepelman, A I M, Ellerbroek, P M, Oosterheert, J J, Arends, J E, Barth, R E, Wassenberg, M W M, Schadd, E M, van Elst-Laurijssen, D H M, van Oers-Hazelzet, E E B, Wensing, A M J, Peters, E J G, van Agtmael, M A, Laan, L M, Pettersson, A M, Vandenbroucke-Grauls, C M J E, Ang, C W, Kinderziekenhuis, Wilhelmina, Geelen, S P M, Wolfs, T F W, Bont, L J, Bezemer, D O, van Sighem, A I, Boender, T S, Rademaker, M J, Pellegrin, J L, Vareil, M O, Dauchy, F A, Receveur, M C, Vandenhende, M A, Viallard, J F, Lafon, Me, Blaizeau, M J, Boerg, Eloïse, Law, Central M, Calvo, Central G, Sambeat, M A, Gennotte, A F, Payen, M C, Neaton, Central J, El-Sadr, W M, Abrams, D I, Crane, L R, Fischer, A H, Larsen, J F, Wien, Pulmologisches Zentrum der Stadt, Mitsura, V M, Møller, N F, Nielsen, L N, Smidt, Jelena, Siseklinik, Nakkusosakond, Viard, J-P, Stellbrink, H J, Goethe, J W, Sthoeger, Z M, Monforte, A D’Arminio, Annunziata, Ospedale S Maria, Blokhina, I N, Novogrod, Nizhny, Gatell, J M, Miró, J M, Rodriguez, J M, Laporte, J M, Johnson, A M, Johnson, M A, Morfeldt, Central L, Perri, G Di, Marchetti, G C, Perno, C F, Caputo, S Lo, Capobianchi, M R, Biagio, A Di, Roldan, E Quiros, Santoro, M M, Caro, A Di, Manconi, P E, Moioli, M C, Ridolfo, A L, Martino, F Di, Cattelan, A M, Ursitti, M A, Sulekova, L Fontanelli, Plazzi, M M, Del Vecchio, R Fontana, Giuli, C Di, Orofino, G C, Roger, P M, Braun, D L, Bucher, H C, Günthard, H F, Hirsch, H H, Kouyos, R D, de Tejada, B Martinez, Metzner, K J, Scherrer, A U, Valk, Marc vd, Han, W Min, Saint-Pierre, C H U, Miro, J M, Wasmuth, J C, Vehreschild, J J, McNicholl, I, Williams, E D, Volny-Anne, R Campo Alain, Dedes, Nikos, Mendão, Luis, Jakobsen, M L, Kumar, L Ramesh, Elsing, T W, and null, null
Abstract: Background: Mortality among people with HIV declined with the introduction of combination antiretroviral therapy. We investigated trends over time in all-cause and cause-specific mortality in people with HIV from 1999-2020. Methods: Data were collected from the D:A:D cohort from 1999 through January 2015 and RESPOND from October 2017 through 2020. Age-standardized all-cause and cause-specific mortality rates, classified using Coding Causes of Death in HIV (CoDe), were calculated. Poisson regression models were used to assess mortality trends over time. Results: Among 55716 participants followed for a median of 6 years (IQR 3-11), 5263 participants died (crude mortality rate [MR] 13.7/1000 PYFU; 95%CI 13.4-14.1). Changing patterns of mortality were observed with AIDS as the most common cause of death between 1999- 2009 (n = 952, MR 4.2/1000 PYFU; 95%CI 4.0-4.5) and non-AIDS defining malignancy (NADM) from 2010 -2020 (n = 444, MR 2.8/1000 PYFU; 95%CI 2.5-3.1). In multivariable analysis, all-cause mortality declined over time (adjusted mortality rate ratio [aMRR] 0.97 per year; 95%CI 0.96, 0.98), mostly from 1999 through 2010 (aMRR 0.96 per year; 95%CI 0.95-0.97), and with no decline shown from 2011 through 2020 (aMRR 1·00 per year; 95%CI 0·96-1·05). Mortality due all known causes except NADM also declined over the entire follow-up period. Conclusion: Mortality among people with HIV in the D:A:D and/or RESPOND cohorts decreased between 1999 and 2009 and was stable over the period from 2010 through 2020. The decline in mortality rates was not fully explained by improvements in immunologic-virologic status or other risk factors.
Published: 2024

12. Pairing in high-density neutron matter including short- and long-range correlations

Author: Ding, D., Rios, A., Dickhoff, W. H., Dussan, H., Polls, A., and Witte, S. J.
Subjects: Nuclear Theory, Astrophysics - Solar and Stellar Astrophysics
Abstract: The influence of short-range correlations (SRC) on the spectral distribution of neutrons is incorporated in the solution of the gap equation for the ${}^3P_2-{}^3F_2$ coupled channel in pure neutron matter at high density. This effect is studied for three different realistic interactions. The gap in this channel is strongly suppressed by these correlations but does not vanish. For a consistent treatment we also include for the first time the effect of long-range correlations (LRC) by incorporating polarization terms in addition to the bare interaction. This allows the neutrons to exchange density and spin fluctuations governed by the strength of Landau parameters with values that are consistent with the available literature. While these LRC have an antiscreening tendency, they only slightly increase the gap in the ${}^3P_2-{}^3F_2$ coupled channel for all three realistic interactions as long as SRC are included. All three interactions generate maximum gaps around 0.1 to 0.2 MeV at most with a small dependence on the hardness of the interaction. These results are relevant for the cooling scenarios of neutron stars, in particular the young neutron star in Cassiopeia A., Comment: 5 pages, 2 figures; submitted to Physical Review Letters plus a supplement
Published: 2015
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13. Pairing in bulk nuclear matter beyond BCS

Author: Ding, D., Witte, S. J., Dickhoff, W. H., Dussan, H., Rios, A., and Polls, A.
Subjects: Nuclear Theory
Abstract: The influence of short-range correlations on the spectral distribution of neutrons is incorporated in the solution of the gap equation for the ${}^3P_2-{}^3F_2$ coupled channel in pure neutron matter. This effect is studied for different realistic interactions including one based on chiral perturbation theory. The gap in this channel vanishes at all relevant densities due to the treatment of these correlations. We also consider the effect of long-range correlations by including polarization terms in addition to the bare interaction which allow the neutrons to exchange density and spin fluctuations governed by the strength of Landau parameters allowed to have reasonable values consistent with the available literature. Preliminary results indicate that reasonable values of these parameters do not generate a gap in the ${}^3P_2-{}^3F_2$ coupled channel either for all three realistic interactions although the pairing interaction becomes slightly more attractive., Comment: 8 pages, 4 figures, AIP conference proceedings of NMP14 workshop Editors: Danielewicz, Zelevinsky, and Levchenko
Published: 2014
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14. First spectroscopic observations of the sub-stellar companion of the young debris disk star PZ Telescopii

Author: Schmidt, T. O. B., Mugrauer, M., Neuhäuser, R., Vogt, N., Witte, S., Hauschildt, P. H., Helling, Ch., and Seifahrt, A.
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract: In 2010 a sub-stellar companion to the solar analog pre-main sequence star PZ Tel and member of the about 12 Myr old Beta Pic moving group was found by high-contrast direct imaging independently by two teams. In order to determine the basic parameters of this companion more precisely and independent of evolutionary models, hence age independent, we obtained follow-up spectroscopic observations of primary and companion. We use the Spectrograph for INtegral Field Observations in the Near Infrared (SINFONI) at the Very Large Telescope Unit 4/YEPUN of ESO's Paranal Observatory in H+K band and process the data using the spectral deconvolution technique. The resulting spectrum of the companion is then compared to a grid of Drift-Phoenix synthetic model spectra, a combination of a general-purpose model atmosphere code with a non-equilibrium, stationary cloud and dust model, using a chi^2 minimization analysis. We find a best fitting spectral type of G6.5 for PZ Tel A. The extracted spectrum of the sub-stellar companion, at a spatial position compatible with earlier orbit estimates, yields a temperature Teff= 2500 +138-115 K, a visual extinction A_V= 0.53 +0.84-0.53 mag, a surface gravity of log g= 3.50 +0.51-0.30 dex, and a metallicity at the edge of the grid of [M/H]= 0.30 -0.30 dex. We derive a luminosity of log(Lbol/Lsun)= -2.66 +0.06-0.08, a radius of R= 2.42 +0.28-0.34 R_Jup and a mass of M= 7.5 +16.9-4.3 M_Jup for the PZ Tel companion, being consistent with most earlier estimates using photometry alone. Combining our results with evolutionary models, we find a best fitting mass of about 21 Jupiter masses at an age corresponding to the recently determined lithium depletion age of 7 +4-2 Myr. Hence, the PZ Tel companion is most likely a wide brown dwarf companion in the 12 +8-4 Myr old Beta Pic moving group., Comment: 7 pages, 6 figures, accepted for publication in A&A
Published: 2014
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15. The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence

Author: Rajpurohit, A. S., Reyle, C., Schultheis, M., Leinert, Ch., Allard, F., Homeier, D., Ratzka, T., Abraham, P., Moster, B., Witte, S., and Ryde, N.
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: LHS1070 is a nearby multiple system of low mass stars. It is an important source of information for probing the low mass end of the main sequence, down to the hydrogen-burning limit. The primary of the system is a mid-M dwarf and two components are late-M to early L dwarfs, at the star-brown dwarf transition. Hence LHS1070 is a valuable object to understand the onset of dust formation in cool stellar atmospheres.This work aims at determining the fundamental stellar parameters of LHS1070 and to test recent model atmospheres: BT-Dusty,BT-Settl, DRIFT, and MARCS models.Unlike in previous studies, we have performed a chi^2-minimization comparing well calibrated optical and infrared spectra with recent cool star synthetic spectra leading to the determination of the physical stellar parameters Teff, radius, and log g for each of the three components of LHS1070., Comment: Accepted in Astronomy and Astrophysics, 15 pages, 11 figures
Published: 2012
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16. Spectroscopy across the brown dwarf/planetary mass boundary - I. Near-infrared JHK spectra

Author: Patience, J., King, R. R., De Rosa, R. J., Vigan, A., Witte, S., Rice, E., Helling, Ch., and Hauschildt, P.
Subjects: Astrophysics - Earth and Planetary Astrophysics
Abstract: With a uniform VLT SINFONI data set of nine targets, we have developed an empirical grid of J,H,K spectra of the atmospheres of objects estimated to have very low substellar masses of \sim5-20 MJup and young ages of \sim1-50 Myr. Most of the targets are companions, objects which are especially valuable for comparison with atmosphere and evolutionary models, as they present rare cases in which the age is accurately known from the primary. Based on the sample youth, all objects are expected to have low surface gravity, and this study investigates the critical early phases of the evolution of substellar objects. The spectra are compared with grids of five different theoretical atmosphere models. This analysis represents the first systematic model comparison with infrared spectra of young brown dwarfs. The fits to the full JHK spectra of each object result in a range of best fit effective temperatures of +/-150-300K whether or not the full model grid or a subset restricted to lower log(g) values is used. This effective temperature range is significantly larger than the uncertainty typically assigned when using a single model grid. Fits to a single wavelength band can vary by up to 1000K using the different models. Since the overall shape of these spectra is governed more by the temperature than surface gravity, unconstrained model fits did not find matches with low surface gravity or a trend in log(g) with age. This suggests that empirical comparison with spectra of unambiguously young objects targets (such as these SINFONI data) may be the most reliable method to search for indications of low surface gravity and youth. For two targets, the SINFONI data are a second epoch and the data show no variations in morphology over time. The analysis of two other targets, AB Pic B and CT Cha B, suggests that these objects may have lower temperatures, and consequently lower masses, than previously estimated., Comment: 15 pages, 13 figures
Published: 2012
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17. The influence of non-isotropic scattering of thermal radiation on spectra of brown dwarfs and hot exoplanets

Author: de Kok, R. J., Helling, Ch., Stam, D. M., Woitke, P., and Witte, S.
Subjects: Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract: (abridged) We calculate near-infrared thermal emission spectra using a doubling-adding radiative transfer code, which includes scattering by clouds and haze. Initial temperature profiles and cloud optical depths are taken from the drift-phoenix brown dwarf model. As is well known, cloud particles change the spectrum compared to when clouds are ignored. The clouds reduce fluxes in the near-infrared spectrum and make it redder than for the clear sky case. We also confirm that not including scattering in the spectral calculations can result in errors on the spectra of many tens of percent, both in magnitude and in variations with wavelength. This is especially apparent for particles that are larger than the wavelength and only have little iron in them. Scattering particles will show deeper absorption features than absorbing (e.g. iron) particles and particle size will also affect the calculated infrared colours. Large particles also tend to be strongly forward-scattering, and we show that assuming isotropic scattering in this case also leads to very large errors in the spectrum. Thus, care must be taken in the choice of radiative transfer method for heat balance or spectral calculations when clouds are present in the atmosphere. Besides the choice of radiative transfer method, the type of particles that are predicted by models will change conclusions about e.g. infrared colours and trace gas abundances. As a result, knowledge of the scattering properties of the clouds is essential when deriving temperature profiles or gas abundances from direct infrared observations of exoplanets or brown dwarfs and from secondary eclipse measurements of transiting exoplanets, since scattering clouds will change the depth of gas absorption features, among other things. Thus, ignoring the presence of clouds can yield retrieved properties that differ significantly from the real atmospheric properties., Comment: Accepted for publication in Astronomy and Astrophysics. The abstract and a part of the introduction have been re-worded compared to the accepted version to avoid misinterpretation of the paper as much as possible
Published: 2011
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18. Ionisation in atmospheres of Brown Dwarfs and extrasolar planets I The role of electron avalanche

Author: Helling, Ch., Jardine, M., Witte, S., and Diver, D. A.
Subjects: Astrophysics - Earth and Planetary Astrophysics
Abstract: Brown Dwarf and extrasolar planet atmospheres form clouds which strongly influence the local chemistry and physics. These clouds are globally neutral obeying dust-gas charge equilibrium which is, on short time scales, inconsistent with the observation of stochastic ionisation events of the solar system planets. We argue that a significant volume of the clouds in Brown Dwarfs and extrasolar planets is susceptible to local discharge events. These are electron avalanches triggered by charged dust grains. Such intra-cloud discharges occur on time scales shorter than the time needed to neutralise the dust grains by collisional processes. An ensemble of discharges is likely to produce enough free charges to suggest a partial and stochastic coupling of the atmosphere to a large-scale magnetic field., Comment: 18 pages in referee's style, 5 figures, Acccepted by ApJ
Published: 2010
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19. Dust in brown dwarfs and extra-solar planets II. Cloud formation for cosmologically evolving abundances

Author: Witte, S., Helling, Ch., and Hauschildt, P. H.
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Substellar objects have extremely long life-spans. The cosmological consequence for older objects are low abundances of heavy elements, which results in a wide distribution of objects over metallicity, hence over age. Within their cool atmosphere, dust clouds become a dominant feature, affecting the opacity and the remaining gas phase abundance of heavy elements. We investigate the influence of the stellar metallicity on the dust formation in substellar atmospheres and on the dust cloud structure and its feedback on the atmosphere. We utilize numerical simulations in which we solve a set of moment equations in order to determine the quasi-static dust cloud structure (DRIFT). These equations model the nucleation, the kinetic growth of composite particles, their evaporation and the gravitational settling as a stationary dust formation process. Element conservation equations augment this system of equations including the element replenishment by convective overshooting. The integration with an atmosphere code (PHOENIX) allows to determine a consistent (T, p, v_conv)-structure, and, hence, also to calculate synthetic spectra. A grid of DRIFT-PHOENIX model atmospheres was calculated for a wide range of metallicity to allow for a systematic study of atmospheric cloud structures throughout the evolution of the universe. We find dust clouds in even the most metal-poor ([M/H]=-6.0) atmosphere of brown dwarfs. Only the most massive among the youngest brown dwarfs and giant gas planets can resist dust formation. For very low heavy element abundances, a temperature inversion develops which has a drastic impact on the dust cloud structure. We further show that the dust-to-gas ratio does not scale linearly with the object's [M/H] for a given effective temperature., Comment: 14 pages, 12 figures
Published: 2009
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20. Generalized ray tracing for axions in astrophysical plasmas

Author: McDonald, J. I., primary and Witte, S. J., additional
Published: 2023
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21. Optimizing pump–probe reflectivity measurements of ultrafast photoacoustics with modulated asynchronous optical sampling

Author: Velsink, M. C., primary, Illienko, M., additional, Sudera, P., additional, and Witte, S., additional
Published: 2023
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22. Direct evidence of a sub-stellar companion around CT Cha

Author: Schmidt, T. O. B., Neuhäuser, R., Seifahrt, A., Vogt, N., Bedalov, A., Helling, Ch., Witte, S., and Hauschildt, P. H.
Subjects: Astrophysics
Abstract: In our ongoing search for close and faint companions around T Tauri stars, we found a very faint (Ks=14.9mag, Ks_0=14.4mag) object, just ~2.67" northwest of the Chamaeleon star-forming region member CT Cha corresponding to a projected separation of ~440AU at 165+/-30 pc. We show that CT Cha A and this faint object form a common proper motion pair from data of the VLT Adaptive Optics (AO) instrument NACO taken in February 2006 and March 2007 and that the companion is by >=4 sigma significance not a stationary background object. Our AO integral field spectroscopy with SINFONI in J, and H+K bands yields a temperature of 2600+/-250K for the companion and an optical extinction of A_V=5.2+/-0.8mag, when compared to spectra calculated from Drift-Phoenix model atmospheres. We demonstrate the validity of the model fits by comparison to several other well-known young sub-stellar objects. Relative flux calibration of the bands was achieved using photometry from the NACO imaging data. We conclude that the CT Cha companion is a very low-mass member of Chamaeleon and very likely a physical companion to CT Cha, as the probability for a by chance alignment is <=0.01. Due to a prominent Pa-Beta emission in the J-band, accretion is probably still ongoing onto the CT Cha companion. From temperature and luminosity (log(Lbol/Lsun)= -2.68+/-0.21), we derive a radius of R=2.20+0.81-0.60 R_Jup. We find a consistent mass of M=17+/-6 MJup for the CT Cha companion from both its luminosity and temperature when placed on evolutionary tracks. Hence, the CT Cha companion is most likely a wide brown dwarf companion or possibly even a planetary mass object., Comment: 10 pages, 11 figures, accepted for publication in A&A
Published: 2008
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23. Prevalence of Child and Adult Sexual Abuse and Risk Taking Practices Among HIV Serodiscordant African-American Couples

Author: El-Bassel, N, Wingood, G, Wyatt, GE, III, JJB, Pequegnat, W, Landis, JR, Bellamy, S, Gilbert, L, Remien, RH, Witte, S, Wu, E, DiClemente, R, Myers, H, Jemmott, LS, Metzger, D, Brown, T, Greene, Q, Helker, C, Robinson, N, Allen-Taylor, L, Appleby, D, Crowley, E, Ankoma, A, Ashton, D, Goddard, DA, Daniel, T, Henderson, T, Rivkin, I, Green, CM, Cheraquit, RD, Gray, D, Hakim, L, Sarfo, B, Saunders, K, Simmons, D, Wilson, K, Braxton, ND, Camp, C, Conner, A, Gibson, J, Harmon, A, Latham, T, Pennick-Walters, T, Rucker, K, Steinback, S, Williams, P, Williams, R, Williams, S, Chancy, K, Levels, F, Thomas, N, Bennett, R, Bryson, S, Curtis, S, Jones, M, Jones, P, Moore, M, Patterson, C, Penn, M, Samuel, A, Shine, R, Stevenson, R, Tate, R, Taylor, M, Wroton, C, Griffith, D, Johnson, P, Matthews, L, Mendoza, R, Winkle, A, Daugherty, J, Er, D, Felix, L, Hailemeskal, M, Howard, T, Hoyte, T, Smith, J, Smith, L, DeMorst, L, Regan, R, Rogers, E, Carter, K, Collier, C, Croom, M, Samuel, D, Sosa, J, Taylor, B, Bryan, TS, Robinson-Simpson, L, Loeb, T, Williams, J, Gueits, L, Bayer, C, Caliendo, A, Freeman, S, Ingersoll, J, Maslankowski, L, McGee-Smith, D, and Moorer, P
Subjects: HIV, Child sexual abuse, Adult sexual abuse, Serodiscordant, Sexual re-victimization, African-American couples
Published: 2010

24. Prominent radiative contributions from multiply-excited states in laser-produced tin plasma for nanolithography

Author: Torretti, F., Sheil, J., Schupp, R., Basko, M. M., Bayraktar, M., Meijer, R. A., Witte, S., Ubachs, W., Hoekstra, R., Versolato, O. O., Neukirch, A. J., and Colgan, J.
Published: 2020
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25. Direct visualization transversus abdominis plane blocks offer superior pain control compared to ultrasound guided blocks following open posterior component separation hernia repairs

Author: Doble, J. A., Winder, J. S., Witte, S. R., and Pauli, E. M.
Published: 2018
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26. Comparison of treatment outcomes for superficial digital flexor tendonitis in National Hunt racehorses

Author: Witte, S., Dedman, C., Harriss, F., Kelly, G., Chang, Y.-M., and Witte, T.H.
Published: 2016
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27. Essays on information regimes and uncertainty in emerging economies

Author: Witte, S, Adam, C, and Cowan, S
Subjects: Economics, Africa, Developing countries
Abstract: This thesis contains three papers studying the behavioural response of firms, households and investors in emerging economies to changes in expectations and uncertainty. The first paper investigates how economic agents change their consumption and investment behaviour to news about unanticipated changes to power sector plans by exploiting a novel dataset for the identification of news shocks in a vector– autoregression. While there is an immediate expectations–driven GDP response to a surprise capacity addition in OECD economies, this positive output effect is absent in developing and emerging countries. Firms and households in developing countries respond to failed power projects by immediately reducing investments and are also subjected to lower economic growth as a result relative to the pre–disappointment period. The second paper examines regulatory uncertainty as a barrier affecting infrastructure service investments and quality in Brazil. Exploiting a quasi–natural experiment for identification, it finds that electric utilities partially shielded from uncertainty significantly increase their irreversible investments in electricity distribution infrastructure. This response is qualitatively consistent with optimal behaviour as prescribed by real options theory. The third paper uses an autoregressive distributed lag model and finds that sovereign and corporate bond yields in emerging economies exhibit a long–run relationship that is not explained by economic conditions, firm fundamentals, bond properties, or external factors affecting emerging countries. The paper identifies perceived transfer risks by investors as the key channel. Investors’ perceived transfer risks lead corporate and sovereign bond yields to co–move and generally converge. The introduction and conclusion of the thesis further explain common themes.
Published: 2023

28. 'I decided in my heart I have to complete the sessions': A qualitative study on the acceptability of an evidence-based HIV risk reduction intervention among women engaged in sex work in Uganda

Author: Mayo-Wilson L.J., Nabunya P., Kiyingi J., Schriger S., Nsubuga E., Nakigudde J., Nabayinda J., Witte S., Ssewamala F.M., Bahar O.S., Tozan Y., and Nattabi J.
Abstract: Background The HIV burden remains a critical public health concern and women engaged in sex work [WESW] are at significantly higher risk compared to the general adult population. Similar to other sub-Saharan African countries, Uganda reports high rates of HIV prevalence among WESW. Yet, they have not been targeted by theory-informed HIV prevention intervention approaches. Methods We conducted semi-structured in-depth interviews with 20 WESW upon intervention completion to explore their experiences with an evidence-based HIV risk reduction intervention that was implemented as part of a combination intervention tested in a clinical trial in Uganda (2018-2023. Specifically, we explored their initial motivations and concerns for participating in the intervention, barriers and facilitators to attendance, and their feedback on specific intervention characteristics. Results The main expectations revolved around access to health-related information, including information on STIs, HIV, and PrEP as well as on how one can protect themselves while engaging in sex work. Initial concerns were around potential breach of confidentiality and fear of arrest. The main facilitators for session attendance were the motivation to learn healthrelated information, the attitude of facilitators, and the incentives received for participation, whereas main challenges were related to family commitments and work schedules. WESW appreciated the group format of the intervention and found the location and times of the intervention delivery acceptable. Discussion and conclusions Overall, our findings suggest that the HIV risk reduction intervention was appropriate and acceptable to WESW. Yet, WESW experience unique concerns and barriers that need to be accounted for when designing interventions targeting this population, especially in resource-limited settings where sex work is illegal and highly stigmatized.
Published: 2023
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29. Posters

Author: Atanassov, A., Zlateva, G., Baleva, M., Wischmeier, Lars, Bekeny, Chegnui, Voss, Tobias, Popescu, Alexandru, Walldorf, Daniel, Schorstein, Kai, Walther, Thomas, Marinova, M., Gnoli, Andrea, Righini, Marcofabio, Vredenborg, Arno, Roeterdink, Wim G., Janssen, Maurice H. M., Salumbides, E., Hannemann, S., Reinhold, E., Labazan, I., Witte, S., Zinkstok, R., Eikema, K., Ubachs, W., Goc, Jacek P., Bartczak, Adam, Zaparucha, Marek, Trojan-Piegza, J., Zych, E., Niittykoski, J., Hölsa, J., Davydenko, L., Babich, I., Plyuto, Y., van Langeveld, A. D., Moulijn, J. A., Gawelda, W., Sobanek, B., Pham, V. T., Kaiser, M., Zaushitsyn, Y., Tarnovsky, A., Grolimund, D., Johnson, S. L., Abela, R., Chergui, M., Bressler, C., Pazik, R., Hreniak, D., Strek, W., Speghini, A., Bettinelli, M., Blanco, V. Diez, Siegel, J., Solis, J., Bonacina, L., Larrégaray, P., van Mourik, F., Troncale, V., Seliuta, D., Goncharova, Olga, Gaspar de Oliveira, Cristina, Coelho de Oliveira, Paulo, de Oliveira, Cristina Gaspar, Almaviva, Salvatore, Baldacchini, Giuseppe, Bonfigli, Francesca, Montereali, Rosa Maria, Vincenti, Maria Aurora, van der Sneppen, Lineke, Carey, James, Tull, Brian, Sheehy, Michael, Diebold, Eric, Mazur, Eric, Di Bartolo, Baldassare, editor, and Forte, Ottavio, editor
Published: 2006
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30. Development of laser-based imaging systems for medical diagnostics

Author: Witte, S., Salumbides, M., Peterman, E. J. G., Brakenhoff, R., van Dongen, G., Toonen, R., Mansvelder, H. D., Groot, M. L., Corkum, Paul, editor, Silvestri, Sandro, editor, Nelson, Keith A., editor, Riedle, Eberhard, editor, and Schoenlein, Robert W., editor
Published: 2009
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31. Ultrafast double pulse parametric amplification for precision Ramsey metrology

Author: Kandula, D. Z., Renault, A., Gohle, C., Wolf, A. L., Witte, S., Hogervorst, W., Ubachs, W., Eikema, K. S. E., Corkum, Paul, editor, Silvestri, Sandro, editor, Nelson, Keith A., editor, Riedle, Eberhard, editor, and Schoenlein, Robert W., editor
Published: 2009
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32. Everolimus With Reduced Tacrolimus Improves Renal Function in De Novo Liver Transplant Recipients: A Randomized Controlled Trial

Author: De Simone, P., Nevens, F., De Carlis, L., Metselaar, H.J., Beckebaum, S., Saliba, F., Jonas, S., Sudan, D., Fung, J., Fischer, L., Duvoux, C., Chavin, K.D., Koneru, B., Huang, M.A., Chapman, W.C., Foltys, D., Witte, S., Jiang, H., Hexham, J.M., and Junge, G.
Published: 2012
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33. Microdroplet-tin plasma sources of EUV radiation driven by solid-state-lasers (Topical Review)

Author: Versolato, O O, primary, Sheil, J, additional, Witte, S, additional, Ubachs, W, additional, and Hoekstra, R, additional
Published: 2022
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34. Demonstration of Frequency Comb Laser Spectroscopy in the Vacuum-Ultraviolet

Author: Zinkstok, R. Th., Witte, S., Ubachs, W., Hogervorst, W., Eikema, K. S. E., Castleman, A. W., Jr., editor, Toennies, J. P., editor, Zinth, W., editor, Yamanouchi, K., editor, Corkum, Paul, editor, Jonas, David M., editor, Miller, R. J. Dwayne., editor, and Weiner, Andrew M., editor
Published: 2007
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35. Generation of 2 Terawatt Sub-8 fs Laser Pulses using Optical Parametric Chirped Pulse Amplification

Author: Witte, S., Zinkstok, R. Th., Hogervorst, W., Eikema, K. S. E., Castleman, A. W., Jr., editor, Toennies, J. P., editor, Zinth, W., editor, Yamanouchi, K., editor, Corkum, Paul, editor, Jonas, David M., editor, Miller, R. J. Dwayne., editor, and Weiner, Andrew M., editor
Published: 2007
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36. Fast and Robust Overlay Metrology from Visible to Infrared Wavelengths Using Dark-field Digital Holographic Microscopy

Author: Messinis, C., van Schaijk, T. T. M., Pandey, N., Tenner, V. T., Koolen, A., Witte, S., de Boer, J. F., den Boef, A. J., Robinson, John C., Sendelbach, Matthew J., Atoms, Molecules, Lasers, ARCNL, Amsterdam Neuroscience - Brain Imaging, LaserLaB - Biophotonics and Microscopy, LaserLaB - Physics of Light, Physics and Astronomy, Robinson, John C., Sendelbach, Matthew J., Amsterdam Neuroscience - Systems & Network Neuroscience, and VU University medical center
Subjects: Digital holographic microscopy, semiconductor manufacturing, SDG 7 - Affordable and Clean Energy, dark-field imaging, overlay metrology
Abstract: The aggressive reduction of semiconductor device dimensions drives many improvements in optical wafer metrology. Currently, chips with device feature sizes below 10 nm are in production which requires robust overlay metrology with sub-nm precision. We will present a compact dark-field Digital Holographic Microscope (df-DHM) that is able to measure overlay on small metrology targets from visible to infrared wavelengths. The coherent amplification and the aberration correction capabilities that is offered by df-DHM allow robust overlay metrology even on weak targets that are covered by absorbing layers. Measured data will be shown that demonstrate the capabilities of this metrology concept.
Published: 2022

37. Improving the precision of semiconductor overlay measurements using dark-field digital holographic microscopy

Author: Adhikary, M., Cromwijk, T., Messinis, C., de Wit, J., Konijnenberg, S., Witte, S., de Boer, J., den Boef, A. J., Amsterdam Neuroscience - Systems & Network Neuroscience, VU University medical center, LaserLaB - Physics of Light, Atoms, Molecules, Lasers, Amsterdam Neuroscience - Brain Imaging, LaserLaB - Biophotonics and Microscopy, and Physics and Astronomy
Subjects: SDG 6 - Clean Water and Sanitation
Abstract: We present dark-field digital holographic microscopy for diffraction-based overlay metrology in semiconductor layers with feature size of a few nanometers. We aim for higher accuracy and precision by calibrating the illumination profile on the targets.
Published: 2022

38. Multi-Mission GIS for the ExoMars Rover Mission’s Oxia Planum Landing Site

Author: Sefton-Nash, E., Fawdon, P., Orgel, C., Balme, M., Quantin-Nataf, C., torres, I., Volat, M., Hauber, Ernst, Adeli, Solmaz, Davis, J., Grindrod, P.M., Frigeri, A., Le Deit, L., Loizeau, Damien, Nass, A., Ruesch, O., Taylor, C., de Witte, S., Vago, J., and The ExoMars, 'Macro' group
Subjects: online GIS, Mapping, Oxia Planum, MMGIS, Geology, ExoMars
Published: 2022

39. The Reconciliation of HiRISE Scale Mapping at Oxia Planum: The Landing Site for the ExoMars Rosalind Franklin Rover

Author: Fawdon, P., Orgel, C., Sefton-Nash, E., Adeli, Solmaz, Balme, M., Davis, J., Frigeri, A., Grindrod, P.M., Hauber, Ernst, Le Deit, L., Loizeau, D., Nass, A., Quantin-Nataf, C., Volat, M., de Witte, S., Vago, Jorge L., and ExoMars RSOWG, 'Macro' group
Subjects: HiRISE, Oxia Planum, Geological map, Photogeology, ExoMars
Published: 2022

40. Glia and the Development of Brain Damage

Author: Knollema, S., van de Witte, S. V., Ter Horst, G. J., Teelken, Albert, editor, and Korf, Jaap, editor
Published: 1997
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41. Sotrastaurin, a Novel Small Molecule Inhibiting Protein-Kinase C: Randomized Phase II Study in Renal Transplant Recipients

Author: Friman, S., Arns, W., Nashan, B., Vincenti, F., Banas, B., Budde, K., Cibrik, D., Chan, L., Klempnauer, J., Mulgaonkar, S., Nicholson, M., Wahlberg, J., Wissing, K.-M., Abrams, K., Witte, S., and Woodle, E.S.
Published: 2011
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42. Petroleum Geochemical Characterisation of the Lower Congo Coastal Basin Bucomazi Formation

Author: Burwood, R., De Witte, S. M., Mycke, B., Paulet, J., Ginsburg, Robert N., editor, and Katz, Barry J., editor
Published: 1995
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43. Improving the precision of semiconductor overlay measurements using dark-field digital holographic microscopy

Author: Adhikary, M., primary, Cromwijk, T., additional, Messinis, C., additional, de Wit, J., additional, Konijnenberg, S., additional, Witte, S., additional, de Boer, J., additional, and den Boef, A. J., additional
Published: 2022
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44. High-Order Harmonic Generation in Laser-Produced Aluminium Plasmas

Author: Mathijssen, J., primary, Mazzotta, Z., additional, Eikema, K. S. E., additional, and Witte, S., additional
Published: 2022
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45. Estimating the contribution of everolimus to immunosuppressive efficacy when combined with tacrolimus in liver transplantation: A model-based approach

Author: Dumortier, T, Looby, M, Luttringer, O, Heimann, G, Klupp, J, Junge, G, Witte, S, VanValen, R, and Stanski, D
Published: 2015
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46. Low-frequency drug-resistant HIV-1 and risk of virological failure to first-line NNRTI-based ART: a multicohort European case–control study using centralized ultrasensitive 454 pyrosequencing

Author: Cozzi-Lepri, Alessandro, Noguera-Julian, Marc, Di Giallonardo, Francesca, Schuurman, Rob, Däumer, Martin, Aitken, Sue, Ceccherini-Silberstein, Francesca, DʼArminio Monforte, Antonella, Geretti, Anna Maria, Booth, Clare L., Kaiser, Rolf, Michalik, Claudia, Jansen, Klaus, Masquelier, Bernard, Bellecave, Pantxika, Kouyos, Roger D., Castro, Erika, Furrer, Hansjakob, Schultze, Anna, Günthard, Huldrych F., Brun-Vezinet, Francoise, Paredes, Roger, Metzner, Karin J., Paredes, Roger, Metzner, Karin J., Cozzi-Lepri, Alessandro, Schuurman, Rob, Brun-Vezinet, Francoise, Günthard, Huldrych, Ceccherini-Silberstein, Francesca, Kaiser, Rolf, Geretti, Anna Maria, Brockmeyer, Norbert, Masquelier, Bernard, Dabis, F., Bruyand, M., Chêne, G., Dabis, F., Lawson-Ayayi, S., Thiébaut, R., Wittkop, L., André, K., Bonnal, F., Bonnet, F., Bernard, N., Caunègre, L., Cazanave, C., Ceccaldi, J., Chossat, I., Courtaud, K., Dauchy, F. A., De Witte, S., Dupon, M., Dupont, A., Duffau, P., Dutronc, H., Farbos, S., Gaborieau, V., Gemain, M. C., Gerard, Y., Greib, C., Hessamfar, M., Lacoste, D., Lataste, P., Lazaro, E., Longy-Boursier, M., Malvy, D., Meraud, J. P., Mercié, P., Monlun, E., Morlat, P., Neau, D., Ochoa, A., Pellegrin, J. L., Pistone, T., Receveur, M. C., Schmeltz, J. Roger, Tchamgoué, S., Vandenhende, M. A., Vareil, M.O., Viallard, J. F., Moreau, J. F., Pellegrin, I., Fleury, H., Lafon, M. E., Masquelier, B., Reigadas, S., Trimoulet, P., Bouchet, S., Breilh, D., Molimard, M., Titier, K., Haramburu, F., Miremont-Salamé., G., Blaizeau, M. J., Decoin, M., Delaune, J., Delveaux, S., DʼIvernois, C., Hanapier, C., Leleux, O., Lenaud, E., Uwamaliya-Nziyumvira, B., Sicard, X., Geffard, S., Le Marec, F., Conte, V., Frosch, A., Leray, J., Palmer, G., Touchard, D., Bonnet, F., Breilh, D., Chêne, G., Dabis, F., Dupon, M., Fleury, H., Malvy, D., Mercié, P., Morlat, P., Neau, D., Pellegrin, I., Pellegrin, J. L., Bouchet, S., Gaborieau, V., Lacoste, D., Tchamgoué, S., Thiébaut, R., Losso, M., Kundro, M., Ramos Mejia, J. M., Vetter, N., Zangerle, R., Karpov, I., Vassilenko, A., Mitsura, V. M., Suetnov, O., Clumeck, N., De Wit, S., Delforge, M., Florence, E., Vandekerckhove, L., Hadziosmanovic, V., Kostov, K., Begovac, J., Machala, L., Jilich, D., Sedlacek, D., Nielsen, J., Kronborg, G., Benfield, T., Larsen, M., Gerstoft, J., Katzenstein, T., Hansen, A.-B. E., Skinhøj, P., Pedersen, C., Ostergaard, L., Dragsted, U. B., Nielsen, L. N., Zilmer, K., Smidt, Jelena, Ristola, M., Katlama, C., Viard, J. P., Girard, P. M., Vanhems, P., Pradier, C., Dabis, F., Neau, D., Duvivier, C., Rockstroh, J., Schmidt, R., van Lunzen, J., Degen, O., Stellbrink, H. J., Bickel, M., Bogner, J., Fätkenheuer, G., Kosmidis, J., Gargalianos, P., Xylomenos, G., Perdios, J., Sambatakou, H., Banhegyi, D., Gottfredsson, M., Mulcahy, F., Yust, I., Turner, D., Burke, M., Pollack, S., HassounRambam, G., Elinav, H., HaouziHadassah, M., EspositoI, R., Mazzotta, F., Vullo, V., Moroni, M., Andreoni, M., Angarano, G., Antinori, A., Castelli, F., Cauda, R., Di Perri, G., Galli, M., Iardino, R., Ippolito, G., Lazzarin, A., Perno, C. F., von Schloesser, F., Viale, P., Monforte, A. DʼArminio, Antinori, A., Castagna, A., Ceccherini-Silberstein, F., Cozzi-Lepri, A., Girardi, E., Lo Caputo, S., Mussini, C., Puoti, M., Andreoni, M., Ammassari, A., Antinori, A., Balotta, C., Bonfanti, P., Bonora, S., Borderi, M., Capobianchi, M. R., Castagna, A., Ceccherini-Silberstein, F., Cingolani, A., Cinque, P., Cozzi-Lepri, A., De Luca, A., Di Biagio, A., Girardi, E., Gianotti, N., Gori, A., Guaraldi, G., Lapadula, G., Lichtner, M., Lo Caputo, S., Madeddu, G., Maggiolo, F., Marchetti, G., Marcotullio, S., Monno, L., Mussini, C., Puoti, M., Quiros Roldan, E., Rusconi, S., Cozzi-Lepri, A., Cicconi, P., Fanti, I., Formenti, T., Galli, L., Lorenzini, P., Carletti, F., Carrara, S., Castrogiovanni, A., Di Caro, A., Petrone, F., Prota, G., Quartu, S., Giacometti, A., Costantini, A., Mazzoccato, S., Angarano, G., Monno, L., Santoro, C., Maggiolo, F., Suardi, C., Viale, P., Vanino, E., Verucchi, G., Castelli, F., Quiros Roldan, E., Minardi, C., Quirino, T., Abeli, C., Manconi, P. E., Piano, P., Vecchiet, J., Falasca, K., Sighinolfi, L., Segala, D., Mazzotta, F., Lo Caputo, S., Cassola, G., Viscoli, C., Alessandrini, A., Piscopo, R., Mazzarello, G., Mastroianni, C., Belvisi, V., Bonfanti, P., Caramma, I., Chiodera, A., Castelli, A. P., Galli, M., Lazzarin, A., Rizzardini, G., Puoti, M., DʼArminio Monforte, A., Ridolfo, A. L., Piolini, R., Castagna, A., Salpietro, S., Carenzi, L., Moioli, M. C., Tincati, C., Marchetti, G., Mussini, C., Puzzolante, C., Gori, A., Lapadula, G., Abrescia, N., Chirianni, A., Guida, M. G., Gargiulo, M., Baldelli, F., Francisci, D., Parruti, G., Ursini, T., Magnani, G., Ursitti, M. A., Cauda, R., Andreoni, M., Antinori, A., Vullo, V., Cingolani, A., dʼAvino, A., Gallo, L., Nicastri, E., Acinapura, R., Capozzi, M., Libertone, R., Tebano, G., Cattelan, A., Sasset, L., Mura, M. S., Madeddu, G., De Luca, A., Rossetti, B., Caramello, P., Di Perri, G., Orofino, G. C., Bonora, S., Sciandra, M., Bassetti, M., Londero, A., Pellizzer, G., Manfrin, V., Brockmeyer, N. H., Skaletz-Rorowski, A., Dupke, S., Baumgarten, A., Carganico, A., Köppe, S., Kreckel, P., Lauenroth-Mai, E., Freiwald-Rausch, M., Gölz, J., Moll, A., Zeitz, M., Hower, M., Reuter, S., Jensen, B., Harrer, T., Esser, S., Brodt, H. R., Plettenberg, A., Stöhr, A., Buhk, T., Stellbrink, H. J., Stoll, M., Schmidt, R., Kuhlmann, B., Mosthaf, F. A., Rieke, A., Becker, W., Volkert, R., Jäger, H., Hartl, H., Mutz, A., Ulmer, A., Müller, M., Aubert, V., Barth, J., Battegay, M., Bernasconi, E., Böni, J., Bucher, H. C., Burton-Jeangros, C., Calmy, A., Cavassini, M., Egger, M., Elzi, L., Fehr, J., Fellay, J., Furrer, H., Fux, C. A., Gorgievski, M., Günthard, H., Haerry, D., Hasse, B., Hirsch, H. H., Hösli, I., Kahlert, C., Kaiser, L., Keiser, O., Klimkait, T., Kovari, H., Kouyos, R., Ledergerber, B., Martinetti, G., Martinez de Tejada, B., Metzner, K., Müller, N., Nadal, D., Pantaleo, G., Rauch, A., Regenass, S., Rickenbach, M., Rudin, C., Schmid, P., Schultze, D., Schöni-Affolter, F., Schüpbach, J., Speck, R., Staehelin, C., Tarr, P., Telenti, A., Trkola, A., Vernazza, P., Weber, R., and Yerly, S.
Published: 2015
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47. The heterogeneity of Epithelioid Hemangioendothelioma (EHE): A case series and review of the literature with emphasis on treatment options

Author: Witte, S., Weidema, M.E., Kaal, S.E., Versleijen-Jonkers, Y.M., Flucke, U.E., Graaf, W.T.A. van der, Desar, I.M., Witte, S., Weidema, M.E., Kaal, S.E., Versleijen-Jonkers, Y.M., Flucke, U.E., Graaf, W.T.A. van der, and Desar, I.M.
Abstract: Item does not contain fulltext, Epithelioid hemangioendothelioma (EHE) is an extremely rare vascular sarcoma with a very heterogeneous presentation and prognosis. We here present five cases of EHE emphasizing diversity in presentation, treatment, and prognosis. Furthermore, we present a review of the literature on EHE treatment options.
Published: 2021

48. Apport pronostique de la résonance magnétique cérébrale dans l’encéphalopathie hypoxique-ischémique du nouveau-né à terme : score d’imagerie, spectroscopie. Étude de 26 cas

Author: Meyer-Witte, S., Brissaud, O., Brun, M., Lamireau, D., Bordessoules, M., and Chateil, J.-F.
Published: 2008
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49. Peritonitis, abscessation and haemorrhage: Complications of transcutaneous caecal decompression

Author: Unger, L., Fouché, N., Schnider, D., and Witte, S.
Published: 2014
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50. Different Methods for Imputing Missing Renal Function Data: Evidence From a Large Clinical Trial in Renal Transplant Recipients.: Abstract# B957

Author: Dong, G., Akacha, M., Ng, J., Escrig, C., Bernhardt, P., and Witte, S.
Published: 2014

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