Flechtner, F., Neumayer, K. H., Kusche, J., Schäfer, W., Sohl, F.
A simulation study has been performed at GFZ Potsdam, which shows the anticipated improvement of the lunar gravity field model with respect to current (LP150Q model) or near-future (SELENE) knowledge...
Unitarity Cutting Rules for Hard Processes on Nuclear Targets (2008)
Unitarity cutting rules for the multiplicity of cut Pomerons, or topological cross sections, have been obtained within the framework of nonlinear k_t factorisation. Proper account for the color...
Tetzlaff, B., Kunkel, R., Schäfer, W., Wendland, F.
The implementation of the EU Water Framework Directive (EU-WFD) forms the background of the WAgriCo-project (Water Resources Management in Cooperation with Agriculture). WagriCo concentrates on the...
Tetzlaff, B., Kunkel, R., Schäfer, W., Wendland, F.
The implementation of the EU Water Framework Directive (EU-WFD) forms the background of the WAgriCo-project (Water Resources Management in Cooperation with Agriculture). WagriCo concentrates on the...
Exclusive photoproduction of Upsilon: from HERA to Tevatron (2008)
Rybarska, A., Schäfer, W., Szczurek, A.
The forward photoproduction amplitude for gamma p to Upsilon p is calculated in a pQCD k_t-factorization approach with an unintegrated gluon distribution constrained by inclusive deep-inelastic...
Micro- and nanomanufacturing strategic research agenda (2008)
Ratchev, S., Turitto, M., Schäfer, W.
The presented strategic research agenda (SRA) is a product of the concerted effort of the European Micro- and Nanomanufacturing technology platform MINAM. The MINAM platform has been created to...
Neues Verfahren zur Montage von Mikro-Komponenten (2008)
Sandmaier, H., Sägebarth, J., Boufercha, N., Schäfer, W., Othman, N., Schlenker, D., ...
Electronic components (for instance RFID) will in the future be smaller and smaller. Mechanical assembly systems used today are not able to follow this downsizing in a proper way. The research...
MINAM - micro and nano manufacturing at European level (2008)
Schäfer, W., Zimmer, K., Burke, T., Reinhardt, A.
More than 150 high-ranking representatives of the European Commission, from industry and research institutes all over Europe, including countries like Russia and Turkey, met in Brussels from January...
Micro-assembly with fluids (2008)
Boufercha, N., Sägebarth, J., Burgard, M., Othman, N., Schlenker, D., Schäfer, W., ...
New applications and the reduction of costs will lead to smaller and thinner electronic chips. Polymer electronics can help for a few applications, but more complex solutions will stay on silicon for...
Mikromontage mit Flüssigkeiten (2008)
Boufercha, N., Sägebarth, J., Othman, N., Schäfer, W., Schlenker, D., Burgard, M., ...
Mikrochips mit einer Kantenlänge von weniger als 500 µm sind eine Herausforderung für die Handhabung, Positionierung und Montage. Als Alternative zum verbreiteten Pick-and-Place-Prinzip wird in...
MINAM - micro and nano manufacturing at European level (2008)
Micro and Nano technological products are increasing rapidly in sectors such as medical, automotive and consumer. To produce these new products appropriate manufacturing technologies are needed. The...
Exclusive photoproduction of $J/\psi$ in proton-proton and proton-antiproton scattering (2007)
Protons and antiprotons at collider energies are a source of high energy Weizs\"acker--Williams photons. This may open a possibility to study exclusive photoproduction of heavy vector mesons at...
Micro- and NanoManufacturing (MINAM) Community (2007)
Since many years there are research activities in the field of micro and nanotechnology. Nowadays new product innovations are not imaginable withour micro and nanotechnology. A very important...
Selfassembly of micro components with microfluidics (2007)
Boufercha, N., Sägebarth, J., Burgard, M., Othman, N., Schäfer, W., Sandmaier, H.
Latest roadmaps indicatre that the size of assembled silicon chips will dramatically be reduced. The size of these chips will be less than 500qm x 500 qm and will have a thickness lower than 50 to 70...
Influences of nanostructured interfaces on microfluidics (2007)
Boufercha, N., Schäfer, W., Sägebarth, J., Sandmaier, H.
In the future the assembly technology of smallest chips will get more and more important. The conventional manufacturing methods now reach the limit in case of the accuracy of position, throughput...
Mobile system for test of hollow axels (2007)
Rockstroh, B., Kappes, W., Bähr, W., Schäfer, W., Schallert, R., Piper, W., ...
The hollow drilled axle tester is designed for mechanised ultrasonic testing of mounted axles with a view to detecting cross-cracking. Based on Deutsche Bahn AG specifi cations, the system was...
Nonlinear k_t factorisation: recent progress and perspectives (2006)
Hard scattering in a strongly absorptive regime requires a novel nonlinear k_t -- factorization. Here we discuss two recent developments: firstly the evaluation of radiative corrections to single...
Unitarity constraints for DIS off nuclei: predictions for electron-ion colliders (2006)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
Future electron-ion colliders (eIC) will focus on the unitarity properties of deep inelastic scattering (DIS) in the limit of strong nuclear absorption. Strong nuclear shadowing and a large abundance...
Forward pion production at large transverse momenta in pp collisions and beyond (2006)
The inclusive production of high-p_\perp particles (pions) in the beam fragmentation regions of high-energy hadronic collisions is driven by the breakup of valence constituents of the beam hadrons...
At the partonic level, a typical final state in small-x deep inelastic scattering off nuclei and hard proton-nucleus collisions can be characterized by the multiplicity of color-excited nucleons....
We report the first derivation of the Landau-Pomeranchuk-Migdal effect for leading jets at fixed values of the transverse momentum p_t in the beam fragmentation region of hadron-nucleus collisions...
Glue in the pomeron from nonlinear k_\perp-factorization (2006)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We derive the nonlinear k_\perp-factorization for the spectrum of jets in high-mass diffractive deep inelastic scattering as a function of three hard scales - the virtuality of the photon Q^2, the...
Roadmap NanoManufacturing: March until July 2006. EU-projects CA IPMMAN and CA MicroSapient (2006)
The Roadmap "NanoManufacturing" shows the development of the production technology for NanoMaterials and NanoSurfaces during next years. It expresses, that some technologies are already...
New ultrasound testing systems for the production testing of rail wheels (2006)
Rockstroh, B., Walte, F., Kappes, W., Bessert, S., Kröning, M., Schäfer, W., ...
Previous standards for the manufacturing inspection of railroad wheels using ultrasound, such as UIC 812, have been replaced by new standards, for example EN 13262 and RD32.144-2000, both requiring...
Ultraschallprüfsysteme für die Produktionsprüfung von Eisenbahnrädern (2006)
Rockstroh, B., Walte, F., Kappes, W., Bessert, S., Kröning, M., Schäfer, W., ...
In both passenger and freight operation, railway wheels are subject to high dynamic stresses. Highspeed passenger services as well as the transport of cost-intensive and hazardous freight put a...
The Working Group NanoManufacturing - a new initiative on European level (2006)
Today new products in nearly all sectors like medicine, automotive, energy, textile are not imaginable without Nanotechnology. Europe has the opportunity to gain the worldwide leadership in this...
Creating a European Micro- and NanoManufacturing Industry (2006)
Dorner, J., Schäfer, W., Ratchev, S., Hitendra, H., Dickerhof, M., ...
Nonlinear $k_{\perp}$-factorization: a new paradigm for an in-nucleus hard QCD (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We review the origin, and salient features, of the breaking of the conventional linear $k_{\perp}$-factorization for an in-nucleus hard pQCD processes. A realization of the nonlinear...
Nonlinear k_\perp-factorization for Gluon-Gluon Dijets Produced off Nuclear Targets (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G.
The origin of the breaking of conventional linear k_\perp-factorization for hard processes in a nuclear environment is by now well established. The realization of the nonlinear nuclear...
Nonlinear k_\perp-factorization for Quark-Gluon Dijet Production off Nuclei (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
The breaking of conventional linear k_\perp-factorization for hard processes in a nuclear environment is by now well established. Here we report a detailed derivation of the nonlinear...
Nonuniversality Aspects of Nonlinear k_\perp-factorization for Hard Dijets (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G.
The origin of the breaking of conventional linear k_\perp-factorization for hard processes in a nuclear environment is by now well established. The realization of the nonlinear nuclear...
Biogas from manure – a new technology to close the nutrient and energy circuit on-farm (2005)
Schäfer, W., Evers, L., Lehto, M., Sorvala, S., Teye, F., Granstedt, A.
The Biodynamic Research Institute in Järna developed a two-phase on-farm biogas plant. The plant digests manure of dairy cattle and organic residues originating from the farm and the surrounding...
Hard Scattering in a Nuclear Environment: Farewell to Linear $k_{\perp}$-Factorization (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We discuss a dramatic change brought into the pQCD description of hard processes in a nuclear environment by a large thickness of heavy nuclei. It breaks the familiar linear $k_{\perp}$-factorization...
Khanna, P.K., Hornbostel, B., Burgard, M., Schäfer, W., Dorner, J.
This paper broadly illustrates the preparation of previous three-dimensional shapes in low-temperature-cofired ceramics (LTCC). Test structures are fabricated by previous moulding single-layer green...
CodeSonar: Ein Plugin-basierter Regelinferierender Code-Browser (2005)
Die Qualität von Softwareprodukten gewinnt immer mehr an Bedeutung. Doch wie erhält man ein qualitatives Produkt und vor allem wie kann man die Qualität messen? Um die Softwarequalität zu...
Nonuniversality aspects of nonlinear k(T)-factorization for hard dijets (2005)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G.
This version is available at the following Publisher URL: http://prl.aps.org
"Breaking of k[perpendicular]-factorization for single jet production off nuclei" (2005)
This version is available at the following Publisher URL: http://prd.aps.org
k_perp-factorization for Hard Processes on Nuclei in the Saturation Regime (2004)
We discuss applications of the recently developed nonlinear k_perp--factorization for hard processes on nuclei. The starting point is the color dipole approach which allows to introduce the concept...
Breaking of k_\perp-factorization for Single Jet Production off Nuclei (2004)
The linear k_\perp-factorization is part and parcel of the pQCD description of high energy hard processes off free nucleons. In the case of heavy nuclear targets the very concept of nuclear parton...
Evolution of high-mass diffraction from the light quark valence component of the pomeron (2004)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We analyze the contribution from excitation of the $(q\bar q)(f\bar f),(q\bar q)g_1...g_n(f\bar f)$ Fock states of the photon to high mass diffraction in DIS. We show that the large $Q^2$ behavior of...
Color dipoles and k_t factorization for nuclei (2004)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We discuss applications of the color dipole approach to hard processes on nuclei. We focus on the relation to k_t--factorisation and the role of a nuclear unintegrated gluon distribution in single--...
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
Based on an approach to non-Abelian propagation of color dipoles in a nuclear medium we formulate a nonlinear k_t-factorization for the breakup of photons and pions into forward hard dijets in terms...
Microsystems are more and more used in mechanical engineering. The article exemplary describes current and future capabilities.
MEMS and microsystems based on low-temperature cofired ceramics: A cost analysis (2004)
Khanna, P.K., Hornbostel, B., Jäger, T., Schäfer, W.
Low temperature cofired ceramics (LTCC) is an emerging technology for production of micro electromechanical systems (MEMS) and micro system technology (MST) components. Due to its inherent advantages...
Khanna, P.K., Hornbostel, B., Grimme, R., Schäfer, W., Dorner, J.
A novel method to fabricate pressure sensors using low-temperature-cofired ceramics (LTCC) and polyvinylidene fluoride (PVDF) piezoelectric polymer is presented. The basic structure consists...
Impact of saturation on s-channel helicity nonconservation for diffractive vector mesons (2003)
Ivanov, I. P., Nikolaev, N. N., Schäfer, W.
As Glauber has shown in 1959, the spin-flip phenomena caused by the conventional spin-orbit interaction do vanish in the scattering off heavy, strongly absorbing nuclei. On the other hand, the origin...
Nonlinear kT factorization for Forward Dijets in DIS off Nuclei in the Saturation Regime (2003)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We develop the QCD description of the breakup of photons into forward dijets in small-x deep inelastic scattering off nuclei in the saturation regime. Based on the color dipole approach, we derive a...
Spin dynamics and spin disorder in frustrated TbCoxNi1-xC2 (2003)
Kalvius, G M, Noakes, D R, Wappling, R, Grosse, G, Schäfer, W, Kockelmann, W, ...
Magnetic behaviour of YFexAl12-x (2003)
Kalvius, G M, Wagner, F E, Noakes, D R, Schreier, E, Wappling, R, Zimmermann, U, ...
New results on high-field transport in semiconductor superlattices (2003)
Holfeld,C.P., Rosam,B., Meinhold,D., Glutsch,S., Schäfer,W., Zhang,J., ...
New results on high-field transport in semiconductor superlattices (2003)
Holfeld, C.P., Rosam, B., Meinhold, D., Glutsch, S., Schäfer, W., Zhang, J., ...
The optical properties of an electrically biased semiconductor superlattice are strongly influenced by coupling to other bands. As these coupling mechanisms depend on the strength of the applied...
Pro-micron: Auftrag und Dienstleistung einer neuen Einrichtung (2003)
Auftrag des im Oktober 2002 gegründeten Unternehmens pro-micron GmbH & Co.KG modular systems ist die Umsetzung des Projektes Technologieoffensive Allgäu. Ziel dieses Projektes ist die Etablierung...
New results on high-field transport in semiconductor superlattices (2003)
Holfeld, C.P., Rosam, B., Meinhold, D., Glutsch, S., Schäfer, W., Zhang, J., ...
High Density QCD, Saturation and Diffractive DIS (2002)
Ivanov, I. P., Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We review a consistent description of the fusion and saturation of partons in the Lorentz-contracted ultrarelativistic nuclei in terms of a nuclear attenuation of color dipole states of the photon...
Lectures on Diffraction and Saturation of Nuclear Partons in DIS off Heavy Nuclei (2002)
Ivanov, I. P., Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
The Lorentz contraction of ultrarelativistic nuclei entails a spatial overlap and fusion (recombination, saturation) of partons belonging to different nucleons at the same impact parameter. In these...
High Density QCD and Saturation of Nuclear Partons (2002)
Ivanov, I. P., Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We review the recent finding of the two-plateau momentum distribution of sea quarks in deep inelastic scattering off nuclei in the saturation regime. The diffractive plateau which dominates for small...
Saturation of Nuclear Partons: the Fermi Statistics or Nuclear Opacity? (2002)
Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
We derive the two-plateau momentum distribution of final state (FS) quarks produced in deep inelastic scattering (DIS) off nuclei in the saturation regime. The diffractive plateau which dominates for...
Diffractive Hard Dijets and Nuclear Parton Distributions (2002)
Ivanov, I. P., Nikolaev, N. N., Schäfer, W., Zakharov, B. G., Zoller, V. R.
Diffraction plays an exceptional role in DIS off heavy nuclei. First, diffraction into hard dijets is an unique probe of the unintegrated glue in the target. Second, because diffraction makes 50 per...
Vector Condensation at Large Chemical Potential (2002)
We discuss the condensation of relativistic spin-one fields at high chemical potential. This phenomenon leads to the spontaneous breaking of rotational invariance, together with the breaking of...
Partial Deconfinement in Color Superconductivity (2002)
Sannino, F., Marchal, N., Schäfer, W.
We analyze the fate of the unbroken SU(2) color gauge interactions for 2 light flavors color superconductivity at non zero temperature. Using a simple model we compute the deconfining/confining...
A field mill based on the modular MEMs framework Match-X (2002)
Matuscheck, P., Evers, J., Schäfer, W., Nienhaus, M., Kleen, S.
This paper presents a miniaturised field mill based on the modular MEMS framework Match-X. The field mill will be used for the measurement of the electrostatic field strength of charged surfaces e.g....
Zimmer, K., Jam, A.K., Schäfer, W.
Mitglieder des industriellen Lenkungsausschusses im wissenschaftlichen Vorprojekt "Mikrosystemtechnik im Maschinen- und Anlagenbau" (BMBF-Vorhaben im Förderprogramm Mikrosystemtechnik)...
Lövenich, J. H. R., Lai, C. W., Hägele, D., Chemla, D. S., Schäfer, W.
This version is available at the following Publisher URL: http://prb.aps.org
Zimmer, K., Jam, A.K., Schäfer, W.
Mitglieder des industriellen Lenkungsausschusses im wissenschaftlichen Vorprojekt "Mikrosystemtechnik im Maschinen- und Anlagenbau" (BMBF-Vorhaben im Förderprogramm Mikrosystemtechnik)...
Modulare Mikrosysteme als Basis für fluidische Analysesysteme (2001)
Schüle, A., Bauer, G., Schäfer, W.
Zur Realisierung vom Markt geforderten flexibel einsetzbaren Analyseverfahren in kostengünstigen, miniaturisierten, einfach zu bedienenden Geräten bietet sich eine modulare Struktur an. Modular...
Modulare Mikrosysteme: Ein Beispiel aus der medizinischen Analytik (2001)
Schüle, A., Bauer, G., Schäfer, W.
Analytical systems for Point-of-Care use show medical, technical and economical advantages especially in emergency diagnostic issues and so promise a high market potential. For the realization of...
Die Automatisierungstechnik fordert miniaturisierte Systeme (2001)
Maschinen und Produktionsanlagen werden laufend im Hinblick auf eine höhere Leistungsfähigkeit, verbesserte Qualitätsmerkmale und eine kostengünstigere Fertigung optimiert. Die Automatisierung...
Coherent production of hard dijets on nuclei in QCD (2001)
Nikolaev, E. D., Schäfer, W., Schwiete, G.
This version is available at the following Publisher URL: http://prd.aps.org
Szczurek, A., Nikolaev, N. N., Schäfer, W., Speth, J.
We discuss how the dijet azimuthal correlations in DIS and real photoproduction at HERA probe the differential (unintegrated) gluon distribution in the proton. We find a strong dependence of the...