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3,248 results on '"Ludwig, W"'

209. Versatile high performance digital SQUID electronics

Author

Ludwig, C., Kessler, C., Steinfort, A.J., and Ludwig, W.

Subjects
Magnetometer -- Research, Superconducting quantum interference devices -- Research, Superconductivity -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Research describing 32 bit superconducting quantum interference device electronics is presented. In particular software gradiometry for multi-channel magnetometer systems is developed.

Published
2001

215. Historical Dictionary of Afghanistan

Author

Thomas H. Johnson, Ludwig W. Adamec, Thomas H. Johnson, and Ludwig W. Adamec

Abstract

Afghanistan is an extremely complex and nuanced country that has been one of the centers of imperial conflict at least for 150 years. From the Czarist Russia's march south in the 19th Century threatening British India, three Anglo-Afghan Wars, the Soviet Invasion and occupation of Afghanistan starting in December 1979 and the resulting anti-Soviet Jihad by the Afghan Mujahideen to Kabul's and their allies'(U.S. and NATO) conflict with the Taliban, Afghanistan has been one of the centers of important international and regional conflicts and events.Historical Dictionary of Afghanistan, Fifth Edition contains a chronology, an introduction, and an extensive bibliography. The dictionary section has more than 1,000 cross-referenced entries on important personalities as well as aspects of the country's politics, economy, foreign relations, religion, and culture. This book is an excellent resource for students, researchers, and anyone wanting to know more about Afghanistan.

Published
2021

218. AIEOP-BFM consensus guidelines 2016 for flow cytometric immunophenotyping of Pediatric acute lymphoblastic leukemia

Author

Dworzak, M, Buldini, B, Gaipa, G, Ratei, R, Hrusak, O, Luria, D, Rosenthal, E, Bourquin, J, Sartor, M, Schumich, A, Karawajew, L, Mejstrikova, E, Maglia, O, Mann, G, Ludwig, W, Biondi, A, Schrappe, M, Basso, G, Dworzak, M, Buldini, B, Gaipa, G, Ratei, R, Hrusak, O, Luria, D, Rosenthal, E, Bourquin, J, Sartor, M, Schumich, A, Karawajew, L, Mejstrikova, E, Maglia, O, Mann, G, Ludwig, W, Biondi, A, Schrappe, M, and Basso, G

Subjects
standardization, flow cytometry, immunophenotyping, leukemia, pediatric, 2734, Histology, Cell Biology, Consensus, Precursor Cell Lymphoblastic Leukemia-Lymphoma, Immunophenotyping, Phenotype, Acute Disease, Humans, Child
Abstract

Immunophenotyping by flow cytometry (FCM) is a worldwide mainstay in leukemia diagnostics. For concordant multicentric application, however, a gap exists between available classification systems, technologic standardization, and clinical needs. The AIEOP-BFM consortium induced an extensive standardization and validation effort between its nine national reference laboratories collaborating in immunophenotyping of pediatric acute lymphoblastic leukemia (ALL). We elaborated common guidelines which take advantage of the possibilities of multi-color FCM: marker panel requirements, immunological blast gating, in-sample controls, tri-partite antigen expression rating (negative vs. weak or strong positive) with capturing of blast cell heterogeneities and subclone formation, refined ALL subclassification, and a dominant lineage assignment algorithm able to distinguish “simple” from bilineal/“complex” mixed phenotype acute leukemia (MPAL) cases, which is essential for choice of treatment. These guidelines are a first step toward necessary inter-laboratory standardization of pediatric leukemia immunophenotyping for a concordant multicentric application. © 2017 International Clinical Cytometry Society.

Published
2018

225. Simulation of viscous flows by highly accurate aeroacoustic schemes on regular grids

Author

Ludwig W. Dorodnicyn and A. V. Alexandrov

Subjects
Plane (geometry), Geometry, 010103 numerical & computational mathematics, Mechanics, Dissipation, Hagen–Poiseuille equation, 01 natural sciences, Vortex, 010101 applied mathematics, Computational Mathematics, Modeling and Simulation, Taylor–Green vortex, Boundary value problem, Computational aeroacoustics, 0101 mathematics, Navier–Stokes equations, Mathematics
Abstract

Highly accurate finite-difference schemes that are widely used in computational aeroacoustics and referred to as dispersion-relation-preserving (DRP) schemes are adapted for the simulation of viscous flows. The main result consists in the construction and verification of numerical boundary conditions on a solid body, artificial boundaries, and on their interface. Calculations are performed for several test problems, including dissipation of the Lamb–Oseen vortex and decay of the Taylor–Green vortex in two-and three-dimensional cases and in infinite and semi-infinite (open-outlet) plane channels.

Published
2017

234. Zusammenführung klinischer Daten im Screen Reject Datawarehouse zur Optimierung der Abstoßungsdiagnostik nach Nierentransplantation

Author

Katzensteiner, M, Zubke, M, Blume, C, Immenschuh, S, Gerbel, S, Schönfeld, N, Marschollek, M, Haller, H, Ludwig, W, and Bott, OJ

Subjects
decision support, ddc: 610, data warehouse, extract transform load, natural language processing, 610 Medical sciences, Medicine, transplantation
Abstract

Hintergrund: Für die medizinische Forschung nimmt die Bedeutung der Zusammenführung von Routinedaten von Patienten stetig zu und erhöht den Bedarf an Lösungen zur Konsolidierung der dazu benötigten Datenstrukturen [ref:1]. Voraussetzung hierfür respektive für[zum vollständigen Text gelangen Sie über die oben angegebene URL], 64. Jahrestagung der Deutschen Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS)

Published
2019
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235. glissement cristallin et glissement aux joints de grains: les deux temps de la partition plastique

Author

Dimanov, Alexandre, BORNERT, Michel, Raphanel, Jean, Héripré, Eva, Bourcier, Mathieu, Gaye, Ababacar, El sabbagh, Alexandre, Ludwig, W., Andrew, King, Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Navier (NAVIER UMR 8205), École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel, Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), and Dimanov, Alexandre

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

236. The ESRF dark-field x-ray microscope at ID06

Author

Kutsal, M., Bernard, P., Berruyer, G., Cook, P. K., Hino, R., Jakobsen, A. C., Ludwig, W., Ormstrup, Jeppe, Roth, T., Simons, Hugh, Smets, K., Sierra, J. X., Wade, J., Wattecamps, P., Yildirim, C., Poulsen, Henning Friis, and Detlefs, C.

Abstract

We present an instrument for dark-field x-ray microscopy installed on beamlineID06 of the ESRF — the first of its kind. Dark-field x-ray microscopy uses full field illumination of the sample and provides three-dimensional (3D) mapping of micro-structure and lattice strain in crystalline matter. It is analogous to dark-field electron microscopy in that an objective lens magnifies diffracting features of the sample. The use of high-energy synchrotron x-rays, however, means that these features can be large and deeply embedded. 3D movies can be acquired with a time resolution of seconds to minutes. The field of view and spatial resolution can be adapted by simple reconfiguration of the x-ray objective lens, reaching spatial and angular resolution of 30-100 nm and 0.001°, respectively. The instrument furthermore allows pre-characterization of samples at larger length scales using 3DXRD or DCT, such that a region of interest (e.g. a singlegrain) can be selected for high-resolution studies without the need to dismount the sample. As examples of applications we show work on mapping the subgrains in plastically deformed iron and aluminum alloys, mapping domains and strain fields in ferroelectric crystals, and studies of biominerals. This ability to directly characterize complex, multi-scale phenomena in-situ is a key step towards formulating and validating multi-scale models that account for the entire heterogeneity of materials. As an outlook, we discuss future prospects for such multi-scale characterization by combining DFXM with 3DXRD/DCT, and coherent x-ray methods for coarser and finer length-scales, respectively.

Published
2019

243. Clinical aspects of acute myeloid leukemias of the FAB types M3 and M4Eo

Author

Haferlach, T., Gassmann, W., Löffler, H., Jürgensen, C., Noak, J., Ludwig, W. -D., Thiel, E., Haase, D., Fonatsch, C., Becher, R., Schlegelberger, B., Nowrousian, M. R., Lengfelder, E., Eimermacher, H., Weh, H. J., Braumann, D., Maschmeyer, G., Koch, P., Heinecke, A., Sauerland, M. C., and T. Büchner for the AML Cooperative Group

Published
1993
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249. Mapping of individual dislocations with dark field x-ray microscopy

Author

Jakobsen, A.C., Simons, H., Ludwig, W., Yildirim, C., Leemreize, H., Porz, L., Detlefs, C., Poulsen, H.F., Jakobsen, A.C., Simons, H., Ludwig, W., Yildirim, C., Leemreize, H., Porz, L., Detlefs, C., and Poulsen, H.F.

Abstract

We present an x-ray microscopy approach for mapping deeply embedded dislocations in three dimensions using a monochromatic beam with a low divergence. Magnified images are acquired by inserting an x-ray objective lens in the diffracted beam. The strain fields close to the core of dislocations give rise to scattering at angles where weak beam conditions are obtained. We derive analytical expressions for the image contrast. While the use of the objective implies an integration over two directions in reciprocal space, scanning an aperture in the back focal plane of the microscope allows a reciprocal space resolution of DQ/Q < 5 · 10-5 in all directions, ultimately enabling high precision mapping of lattice strain and tilt. We demonstrate the approach on three types of samples: a multi-scale study of a large diamond crystal in transmission, magnified section topography on a 140μm thick SrTiO3 sample and a reflection study of misfit dislocations in a 120 nm thick BiFeO3 film epitaxially grown on a thick substrate. With optimal contrast, the full width of half maximum of the dislocations lines are 200 nm, corresponding to the instrumental resolution of the microscope.

Published
2019

250. New test of modulated electron capture decay of hydrogen-like ¹⁴²Pm ions: precision measurement of purely exponential decay

Author

FRS-ESR, ILIMA, SPARC, and TBWD Collaborations, Öztürk, Fatma Cagla, Akkuş, Baki, Atanasov, Dinko, Beyer, Heinrich F., Bosch, Fritz, Boutin, David, Brandau, Carsten, Bühler, Paul, Çakirli Mutlu, Rabia Burcu, Chen, Ruijiu, Chen, Weidong, Chen, Xiangcheng, Dillmann, Iris, Dimopoulou, Christina, Enders, Wolfgang, Essel, Hans G., Faestermann, Thomas, Forstner, Oliver, Gao, Bing-Shui, Geissel, Hans, Gernhäuser, Roman, Grisenti, Robert Evaristo, Gumberidze, Alexandre, Hagmann, Siegbert, Heftrich, Tanja, Heil, Michael, Herdrich, Marc Oliver, Hillenbrand, Pierre-Michel, Izumikawa, Takuji, Kienle, Paul, Klaushofer, Christoph, Kleffner, Carl-Michael, Kozhuharov, Christophor, Knöbel, Ronja, Kovalenko, Oleksandr, Kreim, Susanne, Kühl, Thomas, Lederer-Woods, Claudia, Lestinsky, Michael, Litvinov, Sergey A., Litvinov, Yuri A., Liu, Zhong, Ma, Xinwen, Maier, Ludwig W., Mei, Bo, Miura, Hiroshi, Mukha, Ivan, Najafi, Mohammad Ali, Nagae, Daisuke, Nishimura, Takuro, Nociforo, Chiara, Nolden, Fritz, Ohtsubo, Takashi, Öktem, Yeşim, Omika, Shunichiro, Ozawa, Akira, Petridis, Nikolaos, Piotrowski, Jeremi, Reifarth, René, Roßbach, Jörg, Sánchez Alarcón, Rodolfo Marcelo, Sanjari, Mohammad Shahab, Scheidenberger, Christoph, Sidhu, Ragandeep Singh, Simon, Haik, Spillmann, Uwe, Steck, Markus, Stöhlker, Thomas, Sun, Baohua, Susam, Lidya Amon, Suzaki, Fumi, Suzuki, Takeshi, Torilov, Sergey Yu., Trageser, Christian, Trassinelli, Martino, Trotsenko, Sergiy, Tu, Xiaolin, Walker, Philip M., Wang, M., Weber, Günter, Weick, Helmut, Winckler, Nicolas, Winters, Danyal Ferdinant Alexander, Woods, Philip John, Yamaguchi, Takayuki, Xu, X.D., Yan, X.L., Yang, Jiancheng, Yuan, You-Jin, Zhang, Yuhu, Zhou, Xiaohong, FRS-ESR, ILIMA, SPARC, and TBWD Collaborations, Öztürk, Fatma Cagla, Akkuş, Baki, Atanasov, Dinko, Beyer, Heinrich F., Bosch, Fritz, Boutin, David, Brandau, Carsten, Bühler, Paul, Çakirli Mutlu, Rabia Burcu, Chen, Ruijiu, Chen, Weidong, Chen, Xiangcheng, Dillmann, Iris, Dimopoulou, Christina, Enders, Wolfgang, Essel, Hans G., Faestermann, Thomas, Forstner, Oliver, Gao, Bing-Shui, Geissel, Hans, Gernhäuser, Roman, Grisenti, Robert Evaristo, Gumberidze, Alexandre, Hagmann, Siegbert, Heftrich, Tanja, Heil, Michael, Herdrich, Marc Oliver, Hillenbrand, Pierre-Michel, Izumikawa, Takuji, Kienle, Paul, Klaushofer, Christoph, Kleffner, Carl-Michael, Kozhuharov, Christophor, Knöbel, Ronja, Kovalenko, Oleksandr, Kreim, Susanne, Kühl, Thomas, Lederer-Woods, Claudia, Lestinsky, Michael, Litvinov, Sergey A., Litvinov, Yuri A., Liu, Zhong, Ma, Xinwen, Maier, Ludwig W., Mei, Bo, Miura, Hiroshi, Mukha, Ivan, Najafi, Mohammad Ali, Nagae, Daisuke, Nishimura, Takuro, Nociforo, Chiara, Nolden, Fritz, Ohtsubo, Takashi, Öktem, Yeşim, Omika, Shunichiro, Ozawa, Akira, Petridis, Nikolaos, Piotrowski, Jeremi, Reifarth, René, Roßbach, Jörg, Sánchez Alarcón, Rodolfo Marcelo, Sanjari, Mohammad Shahab, Scheidenberger, Christoph, Sidhu, Ragandeep Singh, Simon, Haik, Spillmann, Uwe, Steck, Markus, Stöhlker, Thomas, Sun, Baohua, Susam, Lidya Amon, Suzaki, Fumi, Suzuki, Takeshi, Torilov, Sergey Yu., Trageser, Christian, Trassinelli, Martino, Trotsenko, Sergiy, Tu, Xiaolin, Walker, Philip M., Wang, M., Weber, Günter, Weick, Helmut, Winckler, Nicolas, Winters, Danyal Ferdinant Alexander, Woods, Philip John, Yamaguchi, Takayuki, Xu, X.D., Yan, X.L., Yang, Jiancheng, Yuan, You-Jin, Zhang, Yuhu, and Zhou, Xiaohong

Abstract

An experiment addressing electron capture (EC) decay of hydrogen-like 142Pm60+ions has been conducted at the experimental storage ring (ESR) at GSI. The decay appears to be purely exponential and no modulations were observed. Decay times for about 9000 individual EC decays have been measured by applying the single-ion decay spectroscopy method. Both visually and automatically analysed data can be described by a single exponential decay with decay constants of 0.0126(7)s−1 for automatic analysis and 0.0141(7)s−1 for manual analysis. If a modulation superimposed on the exponential decay curve is assumed, the best fit gives a modulation amplitude of merely 0.019(15), which is compatible with zero and by 4.9 standard deviations smaller than in the original observation which had an amplitude of 0.23(4).

Published
2019

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