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653 results on '"Heiss, M"'

2. Excitation of positronium from 2S to 20P state

Author

Heiss, M. W., Wichmann, G., Radics, B., and Crivelli, P.

Subjects
Physics - Atomic Physics
Abstract

We report the observation of positronium excitation from the 2S to the 20P state. The Rydberg positronium atoms fly a distance of 40 mm before being field ionized and detected in a micro-channel plate. The time of flight can thus be measured and the velocity distribution of the atoms excited in the 2S state is reconstructed. This is used as an input to the model of the line-shape in order to properly take into account the second order Doppler shift which is the main systematic uncertainty in the 1S-2S measurements of positronium., Comment: 7 pages, 6 figures

Published
2018

3. The positronium hyperfine structure: Progress towards a direct measurement of the $\text{2}^\text{3}\text{S}_\text{1} \rightarrow \text{2}^\text{1}\text{S}_\text{0}$ transition in vacuum

Author

Heiss, M., Wichmann, G., Rubbia, A., and Crivelli, P.

Subjects
Physics - Atomic Physics
Abstract

We present the current status for the direct measurement of the positronium hyperfine structure using the $\text{2}^\text{3}\text{S}_\text{1} \rightarrow \text{2}^\text{1}\text{S}_\text{0}$ transition. This experiment, currently being commissioned at the slow positron beam facility at ETH Zurich, will be the first measurement of this transition and the first positronium hyperfine splitting experiment conducted in vacuum altogether. This experiment will be free of systematic effects found in earlier experiments, namely the inhomogeneity in static magnetic fields and the extrapolation from dense gases to vacuum. The achievable precision is expected to be on the order of $10\, \mathrm{ppm}$ while the systematic uncertainty is estimated to be within a few $\mathrm{ppm}$. This would allow to check recent bound state QED calculations and a $3$-$\sigma$ discrepancy with earlier experiments., Comment: v3 refs. added some typos corrected, 10 pages, 9 Figures, prepared for the proceedings of the PSA2018 conference, Vienna (Austria)

Published
2018

5. The anti-proton charge radius

Author

Crivelli, P., Cooke, D., and Heiss, M. W.

Subjects
Physics - Atomic Physics, High Energy Physics - Experiment
Abstract

The upcoming operation of the Extra Low ENergy Antiprotons (ELENA) ring at CERN, the upgrade of the anti-proton decelerator (AD), and the installation in the AD hall of an intense slow positron beam with an expected flux of $10^{8}$ e$^+$/s will open the possibility for new experiments with anti-hydrogen ($\bar{\text{H}}$). Here we propose a scheme to measure the Lamb shift of $\bar{\text{H}}$. For a month of data taking, we anticipate an uncertainty of 100 ppm. This will provide a test of CPT and the first determination of the anti-proton charge radius at the level of 10%., Comment: 5 pages, 4 Figures, v4 refs 19 added

Published
2016
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6. Quantum dot opto-mechanics in a fully self-assembled nanowire

Author

Montinaro, M., Wüst, G., Munsch, M., Fontana, Y., Russo-Averchi, E., Heiss, M., Morral, A. Fontcuberta i, Warburton, R. J., and Poggio, M.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We show that fully self-assembled optically-active quantum dots (QDs) embedded in MBE-grown GaAs/AlGaAs core-shell nanowires (NWs) are coupled to the NW mechanical motion. Oscillations of the NW modulate the QD emission energy in a broad range exceeding 14 meV. Furthermore, this opto-mechanical interaction enables the dynamical tuning of two neighboring QDs into resonance, possibly allowing for emitter-emitter coupling. Both the QDs and the coupling mechanism -- material strain -- are intrinsic to the NW structure and do not depend on any functionalization or external field. Such systems open up the prospect of using QDs to probe and control the mechanical state of a NW, or conversely of making a quantum non-demolition readout of a QD state through a position measurement., Comment: 20 pages, 6 figures

Published
2014
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10. Human TRMT2A methylates tRNA and contributes to translation fidelity

Author

Witzenberger, M., Burczyk, S., Settele, D., Mayer, W., Welp, L., Heiss, M., Wagner, M., Monecke, T., Janowski, R., Carell, T., Urlaub, H., Hauck, S., Voigt, A., and Niessing, D.

Abstract

5-Methyluridine (m5U) is one of the most abundant RNA modifications found in cytosolic tRNA. tRNA methyltransferase 2 homolog A (hTRMT2A) is the dedicated mammalian enzyme for m5U formation at tRNA position 54. However, its RNA binding specificity and functional role in the cell are not well understood. Here we dissected structural and sequence requirements for binding and methylation of its RNA targets. Specificity of tRNA modification by hTRMT2A is achieved by a combination of modest binding preference and presence of a uridine in position 54 of tRNAs. Mutational analysis together with cross-linking experiments identified a large hTRMT2A–tRNA binding surface. Furthermore, complementing hTRMT2A interactome studies revealed that hTRMT2A interacts with proteins involved in RNA biogenesis. Finally, we addressed the question of the importance of hTRMT2A function by showing that its knockdown reduces translation fidelity. These findings extend the role of hTRMT2A beyond tRNA modification towards a role in translation.

Published
2023

11. What is the evidence for the use of biologic or biosynthetic meshes in abdominal wall reconstruction?

Author

Köckerling, F., Alam, N. N., Antoniou, S. A., Daniels, I. R., Famiglietti, F., Fortelny, R. H., Heiss, M. M., Kallinowski, F., Kyle-Leinhase, I., Mayer, F., Miserez, M., Montgomery, A., Morales-Conde, S., Muysoms, F., Narang, S. K., Petter-Puchner, A., Reinpold, W., Scheuerlein, H., Smietanski, M., Stechemesser, B., Strey, C., Woeste, G., and Smart, N. J.

Published
2018
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12. Clinical implantation of 92 VACStents in the upper gastrointestinal tract of 50 patients—applicability and safety analysis of an innovative endoscopic concept

Author

Lange, J., primary, Knievel, J., additional, Wichmann, D., additional, Kähler, G., additional, Wiedbrauck, F., additional, Hellmich, T., additional, Kandler, M., additional, Bernhardt, J., additional, Scholz, D., additional, Beyna, T., additional, Hausmann, J., additional, Wedi, E., additional, Ellrichmann, M., additional, Hügle, U., additional, Dormann, A. J., additional, Eisenberger, C. F., additional, and Heiss, M. M., additional

Published
2023
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18. Topic: Abdominal Wall Hernia — Abdominal wall closure

Author

Woeste, G., Juratli, M. A., Habbe, N., Hannes, S., El Youzouri, H., Bechstein, W. O., Trombetta, F., Moscato, R., Ciamporcero, T., Ghiglione, F., Morino, M., Tahir, S., Baldjiev, T., Goshev, G., Pachoov, N., Eftimov, E., Kovachevski, S., Smirnoff, A., Roth, J. S., Wennergren, J., Plymale, M. A., Zachem, A., Davenport, D. L., Mangiante, G., Passeri, V., deManzoni, G., Kaufmann, R., Jairam, A. P., Mulder, I. M., Wu, Z., Verhelst, J., Vennix, S., Giessen, L. J. X., Jeekel, J., Lange, J. F., Di Cerbo, F., Ikhlawi, K., Baladov, M., Agha, A., Iesalnieks, I., Franklin, M., Hernandez, M., Glass, J., Glover, M., Gruber-Blum, S., Fortelny, R., May, C., Glaser, K., Redl, H., Petter-Puchner, A., Grossi, J., Cavazzola, L. T., Tezza, S. L. T., Nery, L. A., Zortea, J., Roll, S., Gorganchian, F., Santa Maria, V., Zuvela, M., Galun, D., Petrovic, J., Micev, M., Palibrk, I., Bidzic, N., Colozzi, S., Clementi, M., Cianca, G., Giuliani, A., Carlei, F., Schietroma, M., Amicucci, G., Chung, M., Cerasani, N., Meyer, J., Bulian, D. R., Heiss, M. M., Kocaay, A. F., Eker, T., Celik, S. U., Akyol, C., and Cakmak, A.

Published
2015
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24. Entwicklungsstand in der Thoraxchirurgie

Author

Inderbitzi, R., Ulrich, A., Cohen, S. M., Wexner, S. D., Buchmann, P., Christen, D., Bischofberger, U., Flury, R., Franke, A., Lebrecht, K., Richter, H. A., Heiss, M. M., Meyer, G., Böllinger, C. P., Grützner, K. U., Schildberg, F. W., Wehrmann, U., Stoelben, E., Schilling, B., Nagel, M., Saeger, H. D., Kästel, M., Gebhardt, Ch., Gebhard, F., Becker, H. P., Gerngroß, H., Brückner, U. B., Hohenberger, P., Rau, B., Hünerbein, M., Schlag, P. M., Peitgen, K., Walz, M. K., Walz, M. V., Eigler, F.-W., Roth, K., Schrimm, H., Sieber, J. P., Heeg, P., Reichl, R., Bueß, G., Hartel, W., editor, and Hierholzer, G.

Published
1995
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35. Intraoperative Immuntherapie mit dem trifunktionalen Antikörper Catumaxomab bei Patienten mit fortgeschrittenem Magen-, Colon- und Pankreaskarzinom: Ergebnisse einer Phase I Pilotstudie

Author

Ströhlein, M., Schemanski, O., Jäger, M., Bartelheim, K., Lindhofer, H., Heiss, M. M., Bruch, H. P., editor, Büchler, M. W., editor, Buhr, H. J., editor, Hohenberger, W., editor, Klar, E., editor, Post, S., editor, Schilling, M., editor, Schumpelick, V., editor, Siewert, J. R., editor, Thiede, A., editor, Becker, H., editor, Bittner, R., editor, Függer, R., editor, Köckerling, F., editor, Saeger, H. D., editor, Zornig, C., editor, Hölscher, A., editor, Izbicki, J. R., editor, Jauch, K. W., editor, Senninger, N., editor, Allgayer, H., editor, Bruns, C. J., editor, Celik, I., editor, Fries, H., editor, Kalthoff, H., editor, Schackert, H. K., editor, Brückner, U. B., editor, Ertel, W., editor, Faist, E., editor, Holzheimer, R. G., editor, Holzmann, B., editor, Schade, U. F., editor, Vollmar, B., editor, Heidecke, C. D., editor, Menger, M. D., editor, Neugebauer, E., editor, Spiegel, H. U., editor, Germann, G., editor, Haas, N., editor, Langer, S., editor, Machens, H. G., editor, Stark, G. B., editor, Steinau, H. U., editor, Haverich, A., editor, Heberer, M., editor, Fitze, G., editor, Roth, H., editor, von Schweinitz, D., editor, Waag, K. L., editor, Altendorf-Hofmann, A., editor, Lehnert, T., editor, Lorenz, W., editor, Ohmann, C., editor, Bechstein, W. O., editor, Broelsch, C., editor, Hopt, U., editor, Klempnauer, J., editor, Fändrich, F., editor, Markus, B., editor, Minor, T., editor, Neuhaus, P., editor, Wonigeit, K., editor, Dralle, H., editor, Goretzki, P. E., editor, Rothmund, M., editor, Bühren, V., editor, Josten, C., editor, Muhr, G., editor, Nast-Kolb, D., editor, Stürmer, K. M., editor, Trentz, O., editor, Brunkwall, J., editor, Sandmann, W., editor, Schmitz-Rixen, T., editor, Storck, M., editor, Branscheid, D., editor, Dienemann, H., editor, Hirner, A., editor, Passlick, B., editor, Toomes, H., editor, Beyersdorf, F., editor, Hetzer, R., editor, Schäfers, H. J., editor, Steinsträßer, L., editor, Vogt, P., editor, Arbogast, R., editor, and Bauer, H., editor

Published
2008
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38. Intraperitoneale Immuntherapie der Peritonealkarzinose gastrointestinaler Karzinome mit dem trifunktionalen Antikörper Catumaxomab (anti-EpCAM x anti-CD3): Eine Phase I/II Studie

Author

Ströhlein, M. A., Grützner, K. U., Lordick, F., Rüttinger, D., Peschel, C., Jauch, K. W., Schemanski, O., Heiss, M. M., Bruch, H. P., editor, Büchler, M. W., editor, Buhr, H. J., editor, Hohenberger, W., editor, Klar, E., editor, Kremer, B., editor, Post, S., editor, Schilling, M., editor, Schumpelick, V., editor, Siewert, J. R., editor, Thiede, A., editor, Becker, H., editor, Bittner, R., editor, Függer, R., editor, Köckerling, F., editor, Saeger, H. D., editor, Zornig, C., editor, Hölscher, A., editor, Izbicki, J. R., editor, Junginger, T., editor, Senninger, N., editor, Allgayer, H., editor, Broll, R., editor, Bruns, C. J., editor, Fries, H., editor, Kalthoff, H., editor, Schackert, H. K., editor, Ertel, W., editor, Faist, E., editor, Holzheimer, R. G., editor, Holzmann, B., editor, Schade, U. F., editor, Vollmar, B., editor, Brückner, U. B., editor, Heidecke, C. D., editor, Menger, M. D., editor, Neugebauer, E., editor, Spiegel, H. U., editor, Biemer, E., editor, Germann, G., editor, Haas, N., editor, Machens, H. G., editor, Stark, G. B., editor, Steinau, H. U., editor, Haverich, A., editor, Heberer, M., editor, Rogiers, X., editor, Jauch, K. W., editor, Roth, H., editor, von Schweinitz, D., editor, Waag, K. L., editor, Altendorf-Hofmann, A., editor, Celik, I., editor, Lehnert, T., editor, Lorenz, W., editor, Ohmann, C., editor, Bechstein, W. O., editor, Broelsch, C., editor, Hopt, U., editor, Klempnauer, J., editor, Neuhaus, P., editor, Fändrich, F., editor, Markus, B., editor, Minor, T., editor, Wonigeit, K., editor, Dralle, H., editor, Goretzki, P. E., editor, Rothmund, M., editor, Bühren, V., editor, Josten, C., editor, Muhr, G., editor, Nast-Kolb, D., editor, Stürmer, K. M., editor, Trentz, O., editor, Brunkwall, J., editor, Sandmann, W., editor, Schmitz-Rixen, T., editor, Storck, M., editor, Branscheid, D., editor, Dienemann, H., editor, Hirner, A., editor, Passlick, B., editor, Toomes, H., editor, Beyersdorf, F., editor, Hetzer, R., editor, Schäfers, H. J., editor, Zerkowski, H. R., editor, Becker, H. D., editor, Saeger, H. -D., editor, Jauch, K. -W., editor, and Bauer, H., editor

Published
2006
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42. Use of light-ion-induced SEU in devices under reduced bias to evaluate their SEU cross section

Author

Barak, J., Haran, A., Adler, E., Azoulay, M., Levinson, J., Zentner, A., David, D., Fischer, B.E., Heiss, M., and Betel, D.

Subjects
Nuclear physics -- Research, Ions -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Single-event upset (SEU) cross section was measured for several devices under reduced bias with light ions, in particular [alpha]-particles. The results show that [alpha]-particles can be used, in a simple manner, for testing devices in order to save accelerator time. A proportionality law was found for scaling the reduced bias results to normal operation bias. Index Terms--Light ions, reduced bias SEU, [alpha]-particles SEU.

Published
2004

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