F. Wagner

Details der Publikationsliste

Zeitraum

1974 - 2009

Anzahl

295

Co-Autoren

Using Individual Spectra Simulation for the Study of Pole Figures Errors (2009)

T. A. Lychagina, D. I. Nikolayev, F. Wagner

Crystallographic texture is described by pole figures. In this paper, we continue to study experimental pole figure errors. In other words it can be named pole figure measurement errors. These errors...

Using Individual Spectra Simulation for the Study of Pole Figures Errors (2009)

T. A. Lychagina, D. I. Nikolayev, F. Wagner

Crystallographic texture is described by pole figures. In this paper, we continue to study experimental pole figure errors. In other words it can be named pole figure measurement errors. These errors...

DOI: 10.1007/s004539910003 Computing Mimicking Networks 1 (2008)

S. Chaudhuri, K. V. Subrahmanyam, F. Wagner, C. D. Zaroliagis

Abstract. A mimicking network for a k-terminal network, N, is one whose realizable external flows are the same as those of N. Let S(k) denote the minimum size of a mimicking network for a k-terminal...

Some considerations about Ångström exponent distributions (2008)

Wagner, F., Silva, A. M.

A simulation study has been performed in order to show the influence of the aerosol optical depth (AOD) distribution together with the corresponding error distribution on the resulting Ångström...

Some considerations about Ångström exponent distributions (2008)

Wagner, F., Silva, A. M.

A simulation study has been performed in order to show the influence of the aerosol optical depth (AOD) distribution together with the corresponding error distribution on the resulting Ångström...

Some considerations about Ångström exponent distributions (2008)

F. Wagner, A. M. Silva

A simulation study has been performed in order to show the influence of the aerosol optical depth (AOD) distribution together with the corresponding error distribution on the resulting Ångström...

Long-range transport of desert dust particles from Africa to Portugal during DARPO and SAMUM (2007)

Wagner, F., Bortoli, D., Pereira, S., Costa, M. J., Silva, A. M., Belo, N., ...

Aerosol properties of mineral particles in the far-field of an African desert dust outbreak were investigated inside the project DARPO which was linked to the experiment SAMUM. The maximum particle...

Major Results from Wendelstein 7-AS Stellarator (2007)

F. Wagner, R. Burhenn, F. Gadelmeier, J. Geiger, M. Hirsch, H. P. Laqua, ...

island divertor operation and the modelling of the results with the EMC3/EIRENE code- confinement issues with emphasis on the differences to tokamaks (isotope effect, density scaling, lack of profile...

Presented To Air Force 2025 by (2007)

Maj Jeffrey, A. Brelsford, Maj John, F. Hunnell, ...

2025 is a study designed to comply with a directive from the chief of staff of the Air Force to examine the concepts, capabilities, and technologies the United States will require to remain the...

Liquid Water Path (2007)

T. Jung, E. Ruprecht, F. Wagner

neural network geophysical neural network output parameters measurement neural network input satellite

A Neural Network Second Level Trigger for the H1-Experiment at HERA (2007)

J. Fent, W. Fröchtenicht, F. Gaede, H. Getta, D. Goldner, A. Gruber, ...

At the HERA ep collider the expected machine background rates exceed by several orders of magnitude the typical collision rates from ep physics reactions. One of the great challenges for the ep...

INSTITUTE OF PHYSICS PUBLISHING PLASMA PHYSICS AND CONTROLLED FUSION Plasma Phys. Control. Fusion 45 (2003) A285–A308 PII: S0741-3335(03)67725-0 Experiments close to the beta-limit in W7-AS (2007)

A Weller, J Geiger, A Werner, M C Zarnstorff, E Sall, J Baldzuhn, ...

A major objective of the experimental program in the last phase of the W7-AS stellarator was to explore and demonstrate the high-β performance of advanced stellarators. MHD-quiescent discharges at...

Saharan Mineral Dust Experiment (SAMUM) 2006: Vertical Profiles of Dust Particle Properties from Airborne in situ and Lidar Observations (2007)

Weinzierl, B., Rasp, K., Fiebig, M., Esselborn, M., Wagner, F., Virkkula, A., ...

The Saharan Mineral Dust Experiment (SAMUM) is an initiative of several German universities and research establishments. Its goal is the characterisation of optical, physical, chemical, and radiative...

Magnetresonanztomographische Befunde bei Hunden mit Verdacht auf fibrokartilaginären Rückenmarksinfarkt (2007)

Stein, V.M., Wagner, F., Bull, C., Gerdwilker, A., Seehusen, F., Baumgartner, W., ...

Objective: Dogs suspected to suffer from fibrocartilaginous embolization (FCE) were evaluated in a retrospective study in respect to their findings in magnetic resonance imaging (MRI). Material and...

Sakrokokzygealer Dermoids bei einem Rhodesian Ridgeback - Literaturübersicht und Fallbeschreibung (2007)

Wagner, F., Hewicker-Trautwein, M., Stein, V.M., Gerdwilker, A., Rothkamp, A., Bierstedt, R., ...

Der seltene Befund eines kongenitalen sakrokokzygealen Dermoidsinus Typ IV bei einem 15 Monate alten männlichen Rhodesian Ridgeback wird dargestellt. Die klinischen Symptome umfassten eine...

Detection of novel skeletogenesis target genes by comprehensive analysis of a Runx2−/− mouse model (2007)

Hecht, Jochen, Seitz, Volkhard, Urban, Maren, Wagner, F., Robinson, P. N., Stiege, A., ...

Runx2 is an essential factor for skeletogenesis and heterozygous loss causes cleidocranial dysplasia in humans and a corresponding phenotype in the mouse. Homozygous Runx2-deficient mice lack...

Some considerations about Ångström exponent distributions (2007)

Wagner, F., Silva, A. M.

A simulation study has been performed in order to show the influence of the aerosol optical thickness (AOT) distribution together with the corresponding error distribution on the resulting Ångström...

Some considerations about Ångström exponent distributions (2007)

Wagner, F., Silva, A. M.

A simulation study has been performed in order to show the influence of the aerosol optical thickness (AOT) distribution together with the corresponding error distribution on the resulting Ångström...

© Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License. Some considerations about ˚Angström exponent distributions (2007)

F. Wagner, A. M. Silva

Abstract. A simulation study has been performed in order to show the influence of the aerosol optical depth (AOD) distribution together with the corresponding error distribution on the resulting...

Declaration (2007)

Ali Banani, Supervised Prof, F. Wagner, Ali Banani

The material contained within this thesis has not previously been submitted for a degree at the

Some considerations about Ångström exponent distributions (2007)

F. Wagner, A. M. Silva

A simulation study has been performed in order to show the influence of the aerosol optical thickness (AOT) distribution together with the corresponding error distribution on the resulting Ångström...

Optomat - Optische Technologien zur Herstellung mikrotechnischer Produkte aus artungleichen Materialien: Schlussbericht (2006)

Wagner, F., Ramsayer, R., Hohenberger, B., Hilneder, S., Studt, A., Olowinsky, A., ...

Im Rahmen des vom Bundesministerium für Bildung und Forschung BMBF geförderten Forschungsvorhaben 'Optische Technologien zur Herstellung mikrotechnischer Produkte aus artungleichen Materialien...

Double sine-Gordon model revisited (2005)

Takacs, G., Wagner, F.

We reconsider the mass spectrum of double sine-Gordon theory where recent semiclassical results called into question the previously accepted picture. We use the Truncated Conformal Space Approach...

Time-variation of higher moments in a financial market with heterogeneous agents: an analytical approach (2005)

Alfarano, Simone, Wagner, F. (Friedrich)

A growing body of recent literature allows for heterogenous trading strategies and limited rationality of agents in behavioral models of financial markets. More and more, this literature has been...

Management of virtual enterprises: A case study of german rapid prototyping SMEs (2004)

Wagner, F., Eichert, J., Schirra, R.

This paper describes a case study of the results extracted from the research done in recent EU-projects on current and best practices for maintaining and optimizing Virtual Enterprises (VE). It is...

Bolometer tomography at the density limit of the HDH mode in the W7-AS stellarator (2003)

Giannone, L., Brakel, R., Burhenn, R., Ehmler, H., Feng, Y., Grigull, P., ...

The installation of divertor plates in the W7-AS stellarator has allowed attainment of a high energy confinement regime at high density, where the radiation profiles reached steady state. In this...

Island divertor experiments on the Wendelstein 7-AS stellarator (2003)

McCormick, K., Grigull, P., Burhenn, R., Brakel, R., Ehmler, H., Feng, Y., ...

A promising new operational regime on the Wendelstein stellarator W7-AS has been discovered, fulfilling the conditions of optimal core behavior in combination with edge parameters suitable for...

Divertor operation in stellarators: results from W7-AS and implications for future devices (2003)

Grigull, P., McCormick, K., Renner, H., Masuzaki, S., König, R., Baldzuhn, J., ...

The research on divertors for stellarators is at the beginning. Extensive studies are being prepared on large helical device (LHD) and W7-X. W7-AS is now being operated with an open island divertor...

Influence of magnetic field configurations on divertor plasma parameters in the W7-AS stellarator (2003)

Grigull, P., McCormick, K., Feng, Y., Werner, A., Brakel, R., Ehmler, H., ...

The new island divertor in W7-AS enables quasi steady-state operation with NBI at very high density including scenarios with stable detachment from the targets. Experiments with reversed B-field...

Investigation of the beta-limit in the W7-AS stellarator (2003)

Weller, A., Geiger, J., Zarnstorff, M., Sallander, E., Klose, S., Werner, A., ...

Investigations of the performance and stability of high-beta plasmas have been restarted in W7-AS utilizing higher heating powers and the new divertor system. The combination of beneficial effects...

Improved Performance of the W7-AS Stellarator with the New Island Divertor (2003)

Brakel, R., Grigull, P., McCormick, K., Burhenn, R., Feng, Y., Sardei, F., ...

The island divertor concept has successfully been realized at W7-AS. The divertor gives access to a new NBI-heated high density regime with densities up to 4×10²⁰m-3 and energy confinement well...

A new quasi-stationary, very high density plasma regime on the W7-AS stellarator (2002)

Jaenicke, R., Bäumel, S., Baldzuhn, J., Brakel, R., Burhenn, R., Ehmler, H., ...

Stellarators have the intrinsic property of steady state operation. However, on present-day stellarators the pulse length is usually not only limited due to technical reasons, but also by physical...

New advanced operational regime on the W7-AS stellarator (2002)

McCormick, K., Grigull, P., Burhenn, R., Brakel, R., Ehmler, H., Feng, Y., ...

A promising new plasma operational regime on the Wendelstein stellarator W7-AS has been discovered. It is extant above a threshold density and characterized by flat density profiles, high energy and...

Rapid atmospheric CO2 changes associated with the 8,200-years-B.P. cooling event (2002)

Wagner, F., Aaby, B., Visscher, H.

By applying the inverse relation between numbers of leaf stomata and atmospheric CO2 concentration, stomatal frequency analysis of fossil birch leaves from lake deposits in Denmark reveals a...

Towards the extended user oriented shoe enterprise: Enabling IT for process management of mass customization (2001)

Wagner, F., Kürümlüoglu, M., Bröcker, A.

Transformation from mass produced goods to mass customized ones is challenging but in some branches inescapable. Such a radical change in nature of production forces a complete revision of the...

Nonperturbative study of the two-frequency sine-Gordon model (2000)

Bajnok, Z., Palla, L., Takacs, G., Wagner, F.

The two-frequency sine-Gordon model is examined. The focus is mainly on the case when the ratio of the frequencies is 1/2, given the recent interest in the literature. We discuss the model both in a...

The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations (2000)

Wagner, F., Kürschner, W.M., Neuvonen, S., Visscher, H.

The Fennoscandian birch population primarily consists of Betula nana, B. pendula and B. pubescens ssp. czerepanovii, the Mountain birch. Frequent hybridization between the Mountain birch and B. nana...

Geometric quantisation of the global Liouville mechanics (1999)

Bajnok, Z., Nogradi, D., Varga, D., Wagner, F.

The reduced SL(2,R) WZW quantum mechanics is analysed in the framework of geometric quantization. The spectrum of the Hamiltonian is determined, and it is found, that contrary to the previous...

Erweiterung der EDM/PDM-Funktionalität zur Unterstützung der frühen Phasen der Produktentwicklung (1999)

Frielingsdorf, H., Roth, N., Frech, J., Wagner, F.

The present paper points out, which measures are necessary to support the early phases of the product development. EDM/PDM systems, which represent usually the data processing technical backbone...

Die verteilte Produktentwicklung im Zusammenhang mit DMU, VR und EDMS (1999)

Bröcker, A., Wagner, F.

New technologies help the companies to control the important factors innovation, time, cost and quality. No company which manufactures complex products will be able to escape that technical...

Computational Cartography - Cartography meets Computational Geometry (1999)

M. Molenaar, M. Van Kreveld, F. Wagner, R. Weibel

s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 I/O-Ecient Point Location in Planar Subdivision . . . . . . . . 5 Exploratory Analysis of Spatially Referenced Data Using...

Supersimple Theories (1999)

Steven Buechler Dept, Steven Buechler, A. Pillay, F. Wagner

this paper assumes some acquaintance with model theory and its language. In section 2 we give definitions and background results on simple theories and hyperimaginaries, as well as additional...

A natural experiment on plant acclimation: lifetime stomatal frequency response of an individual tree to annual atmospheric CO2increase (1996)

Wagner, F., Below, R., Klerk, P. De, Dilcher, D.L., Joosten, H., Kürschner, W.M., ...

Carbon dioxide (CO2) has been increasing in atmospheric concentration since the Industrial Revolution. A decreasing number of stomata on leaves of land plants still provides the only morphological...

Optimisation de la mesure de figures de pôles en diffraction X (1996)

Wagner, F., Stosse, M., Nauer-Gerhardt, C.

Les conditions optimales de mesure de figures de pôles ont été recherchées en utilisant différentes variantes de montage (utilisation d'un monochromateur, détecteur en énergie dispersive,...

Optimisation de la mesure de figures de pôles en diffraction X (1996)

Wagner, F., Stosse, M., Nauer-Gerhardt, C.

Les conditions optimales de mesure de figures de pôles ont été recherchées en utilisant différentes variantes de montage (utilisation d'un monochromateur, détecteur en énergie dispersive,...

Presented To Air Force 2025 by (1996)

Maj Jeffrey, A. Brelsford, Maj John, F. Hunnell, ...

2025 is a study designed to comply with a directive from the chief of staff of the Air Force to examine the concepts, capabilities, and technologies the United States will require to remain the...

The Use of the Positivity Method to Approximate the Complete O.D.F. (1996)

F. Wagner

The mathematical problems, in the field of texture analysis, which remain still unsolved are briefly discussed. The importance of the positivity condition and its use in the harmonic method are then...

Geographic Information Systems (1995)

Van Kreveld, G. Neyer, S. Schirra, R. Rickenbach, F. Wagner, P. Widmayer, ...

this report is organized as follows. Section 2 describes map generalization problems and introduces algorithms that solve some of these problems. In Section 3, map labeling problems are discussed and...

Interpretations- und Optimierungsverfahren (1993)

Barfels, L., Rabe, M., Rally, P., Schulte, J., Stiegenroth, H., Schweizer, W., ...

Aufbauend auf Simulationsergebnissen ist eine Analyse von komplexen Fertigungsstrukturen möglich. Eine Aufbereitung der Simulationsergebnisse als Standardfunktionalität von Simulationsprogrammen...

A Time-Parallel Multigrid Method for Two-Phase Stefan Problems (1993)

F. Wagner, Multigrid Method, ...

We present time-parallel multigrid methods for the efficient numerical solution of moving boundary problems of two-phase Stefan type describing heat transfer processes with a change of phase. Using...

Determination of Fully Positive O.D.F.s in the Frame of the Harmonic Method (1992)

F. Wagner

Because of the experimental errors in the pole figures the iterative harmonic method does not succeed in every case in getting a fully positive solution f(g). In this paper, it is proposed to apply,...

Differences in the antiischaemic effects of molsidomine and isosorbide dinitrate (ISDN) during acute and short-term administration in stable angina pectoris (1991)

Wagner, F, Gohlke-Barwolf, C, Trenk, D, Jahnchen, E, Roskamm, H

The acute and short-term effects of treatment with 10 consecutive doses of isosorbide dinitrate 40 mg t.i.d. and molsidomine 8 mg t.i.d. in slow release formulations were investigated in 10 patients...

On-line Texture Analysis for Magnetic Property Control (1989)

H. J. Bunge, H. J. Kopineck, F. Wagner

Magnetic properties of hard and soft magnetic materials are strongly anisotropic, i.e. they depend on the crystal direction in which they are being considered. Technological materials are usually...

Texture Analysis From Incomplete Pole Figures in Low Symmetry Cases (1987)

F. Wagner, M. Humbert

From a classification of crystal symmetries involved in texture analysis we define a set of (low) crystal symmetries that can be similarly managed in the same computer program, using the harmonic...

A new way to include the grain shape in texture simulations with the Taylor model (1985)

Bunge, H.J., Wagner, F., Van Houtte, P.

The use of the Hall-Petch relation in texture simulations with the Taylor-Bishop-Hill model is proposed as a mean to take into account grain shape effect. The results are compared with those obtained...

A new way to include the grain shape in texture simulations with the Taylor model (1985)

Bunge, H.J., Wagner, F., Van Houtte, P.

The use of the Hall-Petch relation in texture simulations with the Taylor-Bishop-Hill model is proposed as a mean to take into account grain shape effect. The results are compared with those obtained...

MÖSSBAUER SPECTRA AND FIRING CONDITIONS OF ANCIENT EGYPTIAN CERAMICS WITH MULTICOLOURED LAYERS (1979)

Riederer, J., Wagner, U., Wagner, F.

Ancient egyptian ceramics found in the region of Thebes and dating from the first intermediate period have been studied by Mössbauer spectroscopy at 4.2 K, 120 K and 300 K. The sherds consist of...

MÖSSBAUER STUDY OF HYDROGEN DIFFUSION AND INTERSTITIAL SITE OCCUPANCY IN 57Co : PdHx AND 57Fe : PdHx (1979)

Pröbst, F., Wagner, F., Karger, M., Wortmann, G.

Hydrogenated palladium has been studied by Mössbauer spectroscopy with sources of 57Co in PdHx and with absorbers of dilute 57Fe in PdHx for hydrogen concentrations up to x = 0.89 and in the...

RAYLEIGH SCATTERING OF MÖSSBAUER RADIATION ON VAPOUR-QUENCHED Te (1979)

Wagner, F., Litterst, F., Kalvius, G.

Non-crystalline Te was prepared by deposition from a molecular beam onto a mylar substrate kept at 80K. The amorphous structure is strongly influenced by sample thickness. Thin samples (≤...

Evaluation by Computer Simulation of Certain Errors in the Three Dimensional Texture Analysis (1978)

M. Humbert, F. Wagner, R. Baro

The influence of certain experimental errors in pole-figure determination on the accuracy of calculated coefficients of the orientation distribution function has been analyzed.

A New Library Program for Texture Calculations (1977)

F. Wagner, C. Esling, R. Baro

A new library program which allows the calculation and storage of the numerical tables necessary for a three-dimensional texture analysis is proposed. Its main characteristics are:–possibility of...

APPLICATIONS OF MÖSSBAUER SCATTERING TECHNIQUES (1976)

Wagner, F.

Mössbauer scattering experiments often yield information that cannot be obtained in the standard transmission arrangement, but they are also more complex both experimentally and conceptually, and...

HYPERFINE FIELDS AT Pt AND Au IN FERROMAGNETIC Pt3X ALLOYS : A TEST FOR THE PROPORTIONALITY BETWEEN CONDUCTION ELECTRON POLARIZATION AND MAGNETIC MOMENT (1976)

Vincze, I., Wagner, F., Baggio-Saitovitch, E., Koch, W.

The Mössbauer resonances in 195Pt (99 keV) and 197Au (77 keV) hâve been used to measure the magnetic hyperfine fields at Pt and Au on the Pt sites in the ferromagnetic fcc Pt3X (X = Cr, Mn, Co)...

HYPERFINE FIELDS IN Co-BASED HEUSLER ALLOYS (1976)

Baggio-Saitovitch, E., Butz, T., Vasquez, A., Vincze, I., Wagner, F., Endo, Keizo

From Mössbauer experiments with 119Sn, 121Sb and 178Hf we have determined the hyperfine rields at Sn, Sb and Hf, respectively, in Hensler alloys of the composition Co2VSn, Co2NbSn, Co2HfSn,...

METHODOLOGY OF "LESS USED" MÖSSBAUER ISOTOPES (1976)

Kalvius, G., Wagner, F., Potzel, W.

A survey is presented of useful parameters of some twenty resonances which so far have found only limited use in general applications of Mössbauer spectroscopy although they possess a good potential...

MÖSSBAUER EXPERIMENTS WITH HIGH ENERGY GAMMA RAYS : THE 158 keV TRANSITION IN 199Hg (1976)

Koch, W., Wagner, F., Flach, D., Kalvius, G.

The 158 keV Mössbauer resonance in 199Hg has been studied both in a transmission geometry by measuring the integral detector current and in backscattering experiments. From the isomer shifts...

MÖSSBAUER STUDY OF THE TIME DEPENDENCE OF THE FORMATION OF Eu2+ AFTER THE ELECTRON CAPTURE DECAY OF 153Gd In SmCl3 (1976)

Wagner, U., Wagner, F., Friedt, J., Mihaila-Tarabasanu, D., Kalvius, G.

The chemical consequences of the electron capture decay of 153Gd in anhydrous SmC13 have been studied by Mössbauer backscattering experiments with the 97 keV and 103 keV gamma rays in 153Eu. With...

PRESSURE DEPENDENCE AND SIGN OF THE ELECTRIC FIELD GRADIENT AT Ir IN THE LINEAR CHAIN STRUCTURE OF Ir(CO)2acac (1976)

Vasquez, A., Wagner, F., Klein, U., Moser, J., Wortmann, G., Keller, H., ...

The 73 keV Mössbauer resonance of 193Ir has been used to study the linear chain structure compound Ir(CO)2acac. From measurements with an absorber composed of aligned single crystals, the electric...

PROCESS BASIC. (1975)

Wagner, F., Woda, H.

KFK-PDV 53 (August 75)

MÖSSBAUER STUDY OF TRANSITION METAL IMPURITIES IN HYDROGEN-LOADED PALLADIUM (1974)

Iannarella, L., Wagner, F., Wagner, U., Danon, J.

The influence of hydrogen-loading of a palladium matrix on the isomer shifts for impurities of 197Au, 195Pt, 193Ir and 99Ru has been studied. In all these systems the electron density at the nuclei...