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See detailStructural Change of the Tourism on Rügen Island – Developments in the Baltic Seaside Resort Binz since 1990
Helfer, Malte UL

in Recent Trends in Tourism: The Baltic and the World (2004), (15), 89-98

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See detailAn optimization of terahertz local oscillators based on LT-GaAs technology
Mayorga, I. C.; Mikulics, M.; Schmitz, A. et al

in SPIE - The International Society for Optical Engineering (2004), 5498 (2004)

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See detailUn système plurilingue peut-il être efficace?
Martin, Romain UL; Houssemand, Claude UL

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2003, September), 15(16), 157-164

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See detailWAPIOP - A WAP-based inter-ORB protocol
Rothkugel, Steffen UL

in Proceedings of 5th European Personal Mobile Communications Conference (Conf Publ No 492) (2003)

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See detailSemidefinite Programming for Detection in Linear Systems - Optimality Conditions and Space-Time Decoding
Jaldén, Joakim; Martin, Cristoff; Ottersten, Björn UL

in IEEE International Conference on Acoustics Speech and Signal Processing (2003)

Optimal maximum likelihood detection of finite alphabet symbols in general requires time consuming exhaustive search methods. The computational complexity of such techniques is exponential in the size of ... [more ▼]

Optimal maximum likelihood detection of finite alphabet symbols in general requires time consuming exhaustive search methods. The computational complexity of such techniques is exponential in the size of the problem and for large problems sub-optimal algorithms are required. In this paper, to find a solution in polynomial time, a semidefinite programming approach is taken to estimate binary symbols in a general linear system. A condition under which the proposed method provides optimal solutions is derived. As an application, the proposed algorithm is used as a decoder for a linear space-time block coding system and the results are illustrated with numerical examples. [less ▲]

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See detailBackgating high-current and breakdown characterisation of AlGaN/GaN HEMTs on silicon substrates
Kuzmik, J.; Blaho, M.; Pogany, D. et al

in Proceedings of the ESSDERC 2003. Estoril, Portugal (2003)

Backgating effect as well as breakdown and high-current performance of AlGaN/GaN HEMTs on silicon substrates are studied. The material structure of investigated devices differ in the thickness of ... [more ▼]

Backgating effect as well as breakdown and high-current performance of AlGaN/GaN HEMTs on silicon substrates are studied. The material structure of investigated devices differ in the thickness of stressrelaxing intermediate layer sequence (~1 μm and ~2.5 μm thick). It is shown that the transistor backgating effect is reduced for the thicker sequence. Similarly, the reverse gate current is two orders of the magnitude lower and the gate-drain breakdown voltage increases substantially in devices with the thicker sequence. Increase from ~40 V to ~160 V of the HEMT blocking capability measured under electrostatic discharge-like conditions is also observed. [less ▲]

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See detailPower Allocation and Bit Loading for Spatial Multiplexing in MIMO Systems
Zhang, Xi; Ottersten, Björn UL

in Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (2003)

The power assignment problem is important for Multiple-Input-Multiple-Output (MIMO) systems to achieve high capacity. Although this problem is solved by well-known water filling algorithms, this does not ... [more ▼]

The power assignment problem is important for Multiple-Input-Multiple-Output (MIMO) systems to achieve high capacity. Although this problem is solved by well-known water filling algorithms, this does not provide an optimal solution if the system is constrained to a fixed raw bit error rate threshold and to discrete modulation s. In this work an approximate approach, called QoS based WF, is proposed to solve the power assignment problem with such constrains. It is shown to outperform quantization of the conventional water filling solution and a well known bit loading algorithm (Chow's algorithm) used in the Digital Subscriber Lines (DSL). [less ▲]

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See detailElectronic structure and optical properties of boron doped single-wall carbon nanotubes
Pichler, T.; Borowiak-Palen, E.; Fuentes, G. G. et al

in AIP Conference Proceedings (2003), 685

We present a study of the electronic structure and the optical properties of boron doped single walled carbon nanotubes which have been produced by a substitution reaction from nanotube templates. The ... [more ▼]

We present a study of the electronic structure and the optical properties of boron doped single walled carbon nanotubes which have been produced by a substitution reaction from nanotube templates. The morphology and crystal structure of the samples have been characterized by transmission electron microscopy and electron energy-loss spectroscopy. Clean boron doped SWCNT with an average boron content of 15 at% have been produced. The B1s and C1s core level spectra reveal that boron is in an sp(2) configuration and that the effective charge transfer is about 0.5 holes per boron to the C-derived states. The boron substitution also leads to new features in the optical absorption spectra which can be attributed to the appearance of an acceptor band about 0.1 eV above the top of the valence band of the SWCNT. These changes in the electronic structure and in the optical properties upon boron substitution are in good agreement with state of the art ab initio calculations. [less ▲]

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See detailBand structure of boron doped carbon nanotubes
Wirtz, Ludger UL; Rubio, A.

in AIP Conference Proceedings (2003), 685

We present ab initio and self-consistent tight-binding calculations on the band structure of single wall semiconducting carbon nanotubes with high degrees (up to 25 %) of boron substitution. Besides a ... [more ▼]

We present ab initio and self-consistent tight-binding calculations on the band structure of single wall semiconducting carbon nanotubes with high degrees (up to 25 %) of boron substitution. Besides a lowering of the Fermi energy into the valence band, a regular, periodic distribution of the p-dopants leads to the formation of a dispersive "acceptor"-like band in the band gap of the undoped tube. This comes from the superposition of acceptor levels at the boron atoms with the delocalized carbon pi-orbitals. Irregular (random) boron-doping leads to a high concentration of hybrids of acceptor and unoccupied carbon states above the Fermi edge. [less ▲]

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See detailRaman spectroscopy of single-wall BN nanotubes
de la Concha, R. A.; Wirtz, Ludger UL; Mevellec, J. Y. et al

in AIP Conference Proceedings (2003), (685), 384-388

We present results on the vibrational properties of BN-SWNTs together with a study of the synthesis material by transmission electron microscopy. Phonon modes have been investigated by Raman spectroscopy ... [more ▼]

We present results on the vibrational properties of BN-SWNTs together with a study of the synthesis material by transmission electron microscopy. Phonon modes have been investigated by Raman spectroscopy with laser excitation wavelengths in the range from 363.8 to 676.44 nm. The assignment of the modes is guided by ab-initio calculations. [less ▲]

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See detailOptical absorption in small BN and C nanotubes
Wirtz, Ludger UL; Olevano, V.; Marinopoulos, A. G. et al

in AIP Conference Proceedings (2003), 685

We present a theoretical study of the optical absorption spectrum of small boron-nitride and carbon nanotubes using time-dependent density-functional theory and the random phase approximation. Both for C ... [more ▼]

We present a theoretical study of the optical absorption spectrum of small boron-nitride and carbon nanotubes using time-dependent density-functional theory and the random phase approximation. Both for C and BN tubes, the absorption of light polarized perpendicular to the tube-axis is strongly suppressed due to local field effects. Since BN-tubes are wide band-gap insulators, they only absorb in the ultra-violet energy regime, independently of chirality and diameter. In comparison with the spectra of the single C and BN-sheets, the tubes display additional fine-structure which stems from the (quasi-) one-dimensionality of the tubes and sensitively depends on the chirality and tube diameter. This fine structure can provide additional information for the assignment of tube indices in high resolution optical absorption spectroscopy. [less ▲]

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See detailVibrational properties of boron nitride nanotubes: Effects of finite length and bundling
Wirtz, Ludger UL; Rubio, A.

in IEEE Transactions on Nanotechnology (2003), 2

We present ab initio calculations of phonons in single-wall. boron nitride nanotubes. Raman and infrared active modes of isolated and infinitely long tubes are evaluated according to the non-symmorphic ... [more ▼]

We present ab initio calculations of phonons in single-wall. boron nitride nanotubes. Raman and infrared active modes of isolated and infinitely long tubes are evaluated according to the non-symmorphic rod groups of BN nanotubes. For tubes of finite length, the selection rules are less restrictive and give rise to additional modes which may be observed in Raman and IR spectroscopy with an intensity depending on the tube length. Bundling of tubes is shown to have little effect on the phonon frequencies. However, arranging tubes in a large periodic array (larger than the wave-length of incoming light) gives rise to a strong frequency shift (LO-TO splitting) of some modes due to the establishing of a macroscopic electric field. Modes of A(1) symmetry experience a shift for laser light along the tube axis and E-1 modes are split for light incidence in the perpendicular direction. [less ▲]

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See detailNumerical Simulation of a Diesel Particulate Filter during Loading and Regeneration
Peters, Bernhard UL

in ASME Internal Combustion Engine Division (2003)

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See detailPeculiarities of low frequency noise in GaN-based high electron mobility transistors
Vitusevich, S. A.; Petrychuk, M. V.; Klein, N. et al

in Proc. 17th Internat. Conf. Noise and Fluctuations ICNF (2003)

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See detailAn Overview Of Public-Key Cryptology
Leprévost, Franck UL

in DPP 2003: International Conference on Digital Production Printing and Industrial Applications (2003)

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See detailAngular distribution of highly charged ions transmitted through metallic microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Lemell, C. et al

in Journal of Electron Spectroscopy & Related Phenomena (2003), 129(2-3), 195-200

The angular distribution of Xe6+ ions with an energy of 800 eV/q transmitted through Ni microcapillaries is studied by a classical trajectory simulation. The results for clean and contaminated by layers ... [more ▼]

The angular distribution of Xe6+ ions with an energy of 800 eV/q transmitted through Ni microcapillaries is studied by a classical trajectory simulation. The results for clean and contaminated by layers of insulating materials of the internal surface of capillary are presented. We show that the angular distributions can be used to identify different phases of hollow ion formation for clean metal surface. We also show that the angular distribution changes dramatically for the case of contaminated surface, i.e. when the image acceleration is depressed. (C) 2003 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailMaterial and Device Issues of AlGaN/GaN HEMTs on Silicon Substrates
Javorka, P.; Alam, A.; Marso, Michel UL et al

in Mat. Res. Soc. Symp. Proc. Vol. 743 (2002), 743, L9.1.1

Results on the preparation and properties of AlGaN/GaN HEMTs on silicon substrates are presented and selected issues related to the material structure and device performance devices are discussed ... [more ▼]

Results on the preparation and properties of AlGaN/GaN HEMTs on silicon substrates are presented and selected issues related to the material structure and device performance devices are discussed. Virtually crack-free AlGaN/GaN heterostructures (xAlN ≅ 0.25), with low surface roughness (rms of 0.64 nm), ns ≅ 1×1013 cm-2 and μ ≅ 1100 cm2/V s at 300 K, were grown by LP-MOVPE on 2-inch (111)Si substrates. HEMT devices with Lg = 0.3−0.7 μm were prepared by conventional device processing steps. Photoionization spectroscopy measurements have shown that a trap level of 1.85 eV, additional to two levels of 2.9 and 3.2 eV found before on GaN-based HEMTs on sapphire, is present in the structures investigated. Self-heating effects were studied by means of temperature dependent dc measurements. The channel temperature of a HEMT on Si increases with dissipated power much slower than for similar devices on sapphire substrate (e.g. reaches 95 and 320 °C on Si and sapphire, respectively, for 6 W/mm power). Prepared AlGaN/GaN/Si HEMTs exhibit saturation currents up to 0.91 A/mm, a good pinch-off, peak extrinsic transconductances up to 150 mS/mm and static heat dissipation capability up to ~16 W/mm. Unity current gain frequencies fT up to 21 and 32 GHz were obtained on devices with gate length of 0.7 and 0.5 μm, respectively. The saturation current and fT values are comparable to those known for similar devices using sapphire and SiC substrates. Properties of AlGaN/GaN/Si HEMTs investigated show that this technology brings a prospect for commercial application of high power rf devices. [less ▲]

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See detailFreestanding LT GaAs as a subpicosecond photoconductive switch and high-voltage photomixer
Mikulics, M.; Siebel, F.; Zheng, X. et al

in Abstract book of 4th Symposium on Non-Stoichiometric III-V Compounds (2002), Physik Mikrostrukturierter Halbleiter 27

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See detailCats could be dogs, but dogs could not be cats: what if they bark and mew? A Connectionist Account of Early Infant Memory and Categorization
Reuter, Robert UL

in Proceedings of the 23rd Annual Conference of the Cognitive Science Society (2001, August 01)

The goal of this paper is to replicate and extend the connectionist model presented by Mareschal and French(1997) as an account of 'the particularities of […] infant memory and categorization'. With ... [more ▼]

The goal of this paper is to replicate and extend the connectionist model presented by Mareschal and French(1997) as an account of 'the particularities of […] infant memory and categorization'. With infants, the sequential presentation of cats followed by dogs yields an expected increase in infants' looking time, whereas the reversed presentation order does not. This intriguing asymmetry of infants' category formation, first reported by Quinn, Eimas, and Rosenkrantz (1993), was simulated by Mareschal et al.'s simple connectionist network. In addition, the authors proposed that this asymmetric categorization is a natural b yproduct of the 'asymmetric overlaps of the visual feature distributions' of cats and dogs. Using a simple feed forward backpropagationnetwork, we successfully replicated this asymmetric categorization effect, as well as a reported asymmetric exclusivity effect in the two categories, and anasymmetric interference effect of learning dogs on the memory for cats, but not of learning cats on the memory for dogs. We furthermore investigated the authors'explanation of the asymmetric effects, firstly, by systematically varying the overall similarity between learned items and interfering items, and secondly, by adding a binary feature to the input set, namely the animal cry (barking vs. mewing). The results of the present modeling underscore the authors' explanation of the observed effects in infants' memory and categorization, but also suggest lines of further experimental research susceptible to undermine the proposed connectionist account. [less ▲]

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See detailInvestigations on the influence of traps in AlGaN/GaN HEMTs
Wolter, M.; Javorka, P.; Marso, Michel UL et al

in EDMO (2001)

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See detailInvestigation of self-heating effects in AlGaN/GaN HEMTs
Kuzmík, J.; Javorka, P.; Alam, A. et al

in Proc. EDMO (2001)

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See detailVaractor Diodes based on an AlGaN/GaN HEMT layer structure
Marso, Michel UL; Wolter, M.; Bernát, J. et al

in EProc. EDMO (2001)

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See detailVertical Double-Gate MOSFET Based on Epitaxial Growth
Moers, J.; Trellenkamp, St; Vescan, L. et al

in Proceedings of the 31st European Solid State Devices Research Conference, Nürnberg, Germany (2001)

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See detailLow-temperature-grown MBE GaAs for terahertz photomixers
Mikulics, M.; Marso, Michel UL; Fox, A. et al

in EDMO (2001)

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See detailSekilas tentang Keamanan di Jaringan Komputer
Müller, Volker UL

in Sintesis - Makalah Universitas Kristen Indonesia (2001)

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See detailLa légitimité est-elle possible par la simple légalité ?
Sosoe, Lukas UL

in Les Cahiers de droit (2001), 42(3), 883-904

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See detailOptimization of AlGaN/GaN HEMT performance
Javorka, P.; Wolter, M.; Alam, A. et al

in Proc. EDMO (2001)

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See detailVertical incidence of slow Ne10+ ions on an LiF surface: Suppression of the trampoline effect
Wirtz, Ludger UL; Lemell, C.; Reinhold, C. O. et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2001), 182

We present a Monte Carlo simulation of the neutralization of a slow Ne10+ ion in vertical incidence on an LiF(100) surface. The rates for resonant electron transfer between surface F- ions and the ... [more ▼]

We present a Monte Carlo simulation of the neutralization of a slow Ne10+ ion in vertical incidence on an LiF(100) surface. The rates for resonant electron transfer between surface F- ions and the projectile are calculated using a classical trajectory Monte Carlo simulation, We investigate the influence of the hole mobility on the neutralization sequence. It is shown that backscattering above the surface due to the local positive charge up of the surface ("trampoline effect") does not take place. (C) 2001 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailFive torsion points on curves of genus two
Boxall, John; Grant, David; Leprévost, Franck UL

in Proceedings of the London Mathematical Society (2000)

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See detailFunctional characteristics of primary afferents innervating normal and inflamed knee joints of the rat
Schmidt, Robert; Pawlak, Matthias; Heppelmann, Bernd et al

in European Journal of Physiology (2000), 439

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See detailInvolvement of nitric oxide in the sensitization of articular afferents to mechanical stimuli
Pawlak, Matthias; Meßlinger; Hanesch, Ulrike UL et al

in Regulatory Peptides (2000), 89

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See detailModulatory effects of nociceptin on rat knee joint mechanoreceptors
McDougall, Jason; Pawlak, Matthias; Hanesch, Ulrike UL et al

in Regulatory Peptides (2000), 89

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See detailInhibitory effects of gabapentin on rat articular afferent mechanosensitivity
Hanesch, Ulrike UL; McDougall, Jason; Pawlak, Matthias

in Regulatory Peptides (2000), 89

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See detailSurface Induced Order in Organic and Anorganic Materials on Nano-Structured Poly-tetrafluoroethylene.
Krüger, Jan-Kristian UL; Fischer, C.; Baller, Jörg UL et al

in Frontiers in Science and Technology, Advanced Physics Studies Press (2000),7th FSRC FERROELECTRICS-2000 (2000)

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See detailA Novel InAlAs/InGaAs Layer Structure for Monolithically Integrated Photoreceiver,
Hodel, U.; Orzati, A.; Marso, Michel UL et al

in Proc. 2000 Int. Conf. Indium Phosphide and Related Materials (2000)

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See detailObservation of a threshold in potential sputtering of LiF surfaces
Hayderer, G.; Lemell, C.; Wirtz, Ludger UL et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2000), 164

A quartz-crystal microbalance technique is used for measuring total sputtering yields for LiF under impact of slow (20 eV, 100 eV, 500 eV and 1000 eV kinetic energy) singly and doubly charged ions. At low ... [more ▼]

A quartz-crystal microbalance technique is used for measuring total sputtering yields for LiF under impact of slow (20 eV, 100 eV, 500 eV and 1000 eV kinetic energy) singly and doubly charged ions. At low kinetic energies (less than or equal to 100 eV) potential sputtering (PS) (i.e., sputtering due to the projectiles potential energy) clearly dominates over kinetically induced sputtering. New insight into the mechanisms for PS is gained by determining the minimum potential energy necessary to induce PS. The measured potential energy threshold at around 10 eV provides evidence that PS can already be induced by the production of cold holes in the valence band of LiF via resonant neutralisation. (C) 2000 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailCurve-crossing analysis for potential sputtering of insulators
Wirtz, Ludger UL; Hayderer, G.; Lemell, C. et al

in Surface Science (2000), 451(1-3), 197-202

We develop a theoretical model for the recently observed threshold for potential sputtering of LiF by slow singly and doubly charged ions. The threshold coincides with the potential energy to create a ... [more ▼]

We develop a theoretical model for the recently observed threshold for potential sputtering of LiF by slow singly and doubly charged ions. The threshold coincides with the potential energy to create a cold hole in the valence band of LiF by resonant neutralization. We calculate the level shift of the incident ion and the deformation of the valence band under the influence of the projectile. Resonant neutralization becomes possible for ions with recombination energies larger than 10 eV in agreement with the experimental findings. (C) 2000 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailMIMO Channel Capacity on a Measured Indoor Radio Channel at 5.8 GHz
Stridh, Rickard; Karlsson, Peter; Ottersten, Björn UL

in Proceedings Asilomar Conference on Signals, Systems & Computers (2000)

Multiple transmitters and receivers can be used to provide high link capacity in future wireless systems. Herein, an analysis of indoor environment Multiple-Input-Multiple-Output measurements in the 5.8 ... [more ▼]

Multiple transmitters and receivers can be used to provide high link capacity in future wireless systems. Herein, an analysis of indoor environment Multiple-Input-Multiple-Output measurements in the 5.8 GHz band is performed and the possible increase in capacity, utilizing multiple transmitters and receivers is examined. The investigation shows that in the measured indoor environment, the scattering is sufficiently rich to provide substantial link capacity increases. Furthermore, the effect of intra-element element spacing on the channel capacity is studied. Finally the possible HiperLAN/2 MIMO channel capacity, based on the measurements, is examined. [less ▲]

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See detailEmploi et mobilité résidentielle des personnes travaillant au Grand-Duché de Luxembourg en 1994 et 1997
Fehlen, Fernand UL; Pigeron-Piroth, Isabelle UL; Ramm, Michel

in Trajectoires d’emploi et conditions d’existence des individus (2000)

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See detailSpontaneous Networking with CORBA, Jini & JavaCards in RoamX, a Mobile X-Desktop
Rothkugel, Steffen UL; Sturm, Peter

in DOA '00: Proceedings of the International Symposium on Distributed Objects and Applications (2000)

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See detailCarPAcities: Distributed Car Pool Agencies in Mobile Networks
Rothkugel, Steffen UL; Sturm, Peter

in ASA/MA 2000: Proceedings of the Second International Symposium on Agent Systems and Applications and Fourth International Symposium on Mobile Agents (2000)

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See detailHow to bypass the Wassenaar Arrangement: A new application for watermarking
Ebrahimi, Touradj; Erard, Raphael; Kutter, Martin et al

in Abstract book of 8th ACM International Multimedia Conference on Multimedia and Security (2000)

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See detailJSalsa: Jini Service Agglomeration in Large Scale Assemblages
Ehleringer, Burkhard; Rothkugel, Steffen UL; Sturm, Peter

in Abstract book of 1st United GI Conference on Object-Oriented Programming for the Net World (Net.ObjectDays 2000) (2000)

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See detailAES und IEEE-P1363, die kryptographischen Standards des 21. Jahrhunderts
Leprévost, Franck UL

in Tagungsband des 6. Deutschen IT-Sicherheitskongresses des BSI (1999)

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See detailCORBA, Java, C++ and ODBMS for Distributed Web Computing - The Taming of the Shrew
Rothkugel, Steffen UL; Sturm, Peter

in Architektur von Rechensystemen, Systemarchitektur auf dem Weg ins 3. Jahrtausend: Neue Strukturen, Konzepte, Verfahren und Bewertungsmethoden - Vorträge der 15. GI/ITG-Fachtagung ARCS '99 und der APS'99 (Arbeitsplatzrechensysteme) (1999)

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See detailThe modular points of a genus 2 quotient of X_0(67)
Leprévost, Franck UL

in Proceedings of the Finite Field Conference of the American Mathematical Society (Contemporary Mathematics) (1999), 245

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See detailInteraction of highly charged ions with microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Burgdorfer, J.

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (1999), 154(1-4), 307-311

We analyze the transmission of highly charged ions (HCI) through microcapillaries. The interaction of an HCI with the interval surface of the capillary is treated within the framework of linear response ... [more ▼]

We analyze the transmission of highly charged ions (HCI) through microcapillaries. The interaction of an HCI with the interval surface of the capillary is treated within the framework of linear response. In the limiting case of an ideal conducting cylindrical surface, the interaction reduces to a classical image potential. For Neq+ projectiles transmitting through a Ni capillary calculations for the impact parameter distribution and angular distribution of hollow atoms are presented. We find the fraction of transmitted projectiles which are partially neutralized in good agreement with recent experiments. (C) 1999 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailApproche comparée de la responsabilité des magistrats en Europe, synthèse d'une table ronde
Ravarani, Georges UL

in Site internet de l'Ecole nationale de la magistrature (1999)

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See detailInteraction of highly charged ions with microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Burgdorfer, J.

in PHYSICA SCRIPTA (1999), T80B

The transmission of highly charged ions (HCI) through microcapillaries is investigated. The interaction of an HCI with the internal surface of the capillary is described in terms of a classical image ... [more ▼]

The transmission of highly charged ions (HCI) through microcapillaries is investigated. The interaction of an HCI with the internal surface of the capillary is described in terms of a classical image potential. For Neq+ projectiles transmitted through a Ni capillary the impact parameter distribution and angular distribution of ions leaving the microcapillary is determined. We consider both a narrowly focussed and a dispersive incident beam relative to the acceptance angle of the capillary. Our results are compared with recent experiments. [less ▲]

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See detailSymbiose von Kryptographie und digitalen Wasserzeichen: effizienter Schutz des Urheberrechtes digitaler Medien
Kutter, Martin; Leprévost, Franck UL

in Tagungsband des 6. Deutschen IT-Sicherheitskongresses des BSI (1999)

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See detailThe Effects of Local Scattering on Direction of Arrival Estimation with MUSIC and ESPRIT
Asztély, David; Ottersten, Björn UL

in Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (1998)

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See detailMLSE and Spatio-Temporal Interference Rejection Combining with Antenna Arrays
Asztély, David; Ottersten, Björn UL

in Proceedings European Signal Processing Conference (1998)

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See detailArchitecture-Centric Software Development Based on Extended Design Spaces
Baum, Lothar; Geyer, Lars; Molter, Georg et al

in Proceedings of the Second International ESPRIT ARES Workshop on Development and Evolution of Software Architectures for Product Families (1998)

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See detailFunctional Genome Analysis
Schneider, Reinhard UL

in Proceedings zur Tagung Hoechstleistungsrechnen in der Chemie. Tagung fuer industrielle Anwender (1998)

Scientific history is made in sequencing complete genomes. Two challenges loom large: decipher the function of all genes and describe the workings of the eukaryotic cell in full molecular detail ! A ... [more ▼]

Scientific history is made in sequencing complete genomes. Two challenges loom large: decipher the function of all genes and describe the workings of the eukaryotic cell in full molecular detail ! A combination of experimental and theoretical approaches will be brought to bear on these challenges. What's next in genome analysis from the point of view of bioinformatics ? [less ▲]

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See detailThe electrical behaviour of GaAs MESFETs formed on high and low temperature GaAs buffer layers
Borouriand, Farahd; Jostock, Markus UL; Hopkinson, M et al

in High Performance Electron Devices for Microwave and Optoelectronic Applications (1997, November 24)

Comparisons have been made between the channel currents in GaAs hESFETs prepared on GaAs buffer layers prepared at normal and low temperatures. All devices made on LT buffer layers had saturated channel ... [more ▼]

Comparisons have been made between the channel currents in GaAs hESFETs prepared on GaAs buffer layers prepared at normal and low temperatures. All devices made on LT buffer layers had saturated channel currents which were about 20% of similar devices on a normal buffer. An attempt was made to remove Ga vacanciies from the LT buffer by a high temperature anneal step before the epitaxial layer was prepared. This had no effect in increasing the channel current. In all cases the pinchoiy voltage was unchanged indicating constancy of the channel thickness and donor concentration. It is concluded that the loss of current is due to a loss of mobile charge through trapping. [less ▲]

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See detailApplication de la Conception Objet Orienté à la Modélisation de l'Incinération de Déchets Municipaux
Peters, Bernhard UL

in Informatique pour l’Environnement ’97 (1997)

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See detailCoexistence of substance P- and CGRP-like immunoreactivity in DRG neurons of the articular nerves
Tamura, Ryoko; Hanesch, Ulrike UL; Kumazawa, Takao et al

in Neuroscience Research. Supplement : The Official Journal of the Japan Neuroscience Society (1997), 21

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See detailnicotine effect on selective attention
Mancuso, Giovanna UL; Vandenberghe, Michelle

in Proceedings of the Low Countries Meeting (1997)

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See detailImproved MUSIC Algorithm for Estimation of Time Delays in Asynchronous DS-CDMA Systems
Östman, Thomas; Parkvall, Stefan; Ottersten, Björn UL

in Proceedings of Asilomar Conference on Signals, Systems & Computers (1997)

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See detailOptoelectronic DC and RF behaviour of InAlAs/InGaAs based HEMTs at 1.3µm wavelength
Marso, Michel UL; Fox, A.; Förster, A. et al

in Proc. 3rd Asia-Pacific Conference on Communications, Sydney, Australia (1997)

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See detailHigh Bandwidth InP/InGaAs Based MSM-2DEG Diodes For Optoelectronic Application,
Marso, Michel UL; Horstmann, M.; Schimpf, K. et al

in Proceedings of the 9th International Conference on InP and Related Materials (1997)

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See detailA Public Key Cryptosystem based on Elliptic Curves over Z/nZ Equivalent to Factoring
Biehl, Ingrid UL; Meyer, Bernd; Müller, Volker UL

in Advances in Cryptology - Eurocrypt '96 (1996)

The paper describes a new cryptosystem for elliptic curves over the ring Z/nZ which is equivalent to the Rabin-Williams cryptosystem. We prove that breaking the new cryptosystem is equivalent to factoring ... [more ▼]

The paper describes a new cryptosystem for elliptic curves over the ring Z/nZ which is equivalent to the Rabin-Williams cryptosystem. We prove that breaking the new cryptosystem is equivalent to factoring the modulus n. [less ▲]

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See detailMaturation of cross-sensitization between cocaine and quipirole and vice versa in preweaning rats pups
Schoonbroodt, Rolland; Mancuso, Giovanna UL; Tirelli, Ezio

in Proceedings of the 17th Low Countries Meeting (1996)

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See detailEffects of low and high doses of nicotine on habituation in mice.
Mancuso, Giovanna UL; Tirelli, Ezio

in Proceedings of the 17th Low Countries Meeting (1996)

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See detailBlind Subspace Identification of a BPSK Communication Channel
Kristensson, Martin; Ottersten, Björn UL

in 30:th Asilomar Conference on Signals, Systems & Computers (1996)

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See detailFrequency Response of InP/InGaAs MSM Photodetector with Current Transport Along 2DEG
Horstmann, M.; Hollfelder, M.; Muttersbach, J. et al

in Proceedings of the 8th International Conference on InP and Related Compounds, Schwäbisch Gmünd, Germany (1996)

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See detailNicotine Interact With Gabaergic System: Behavioural Evidences?,
Mancuso, Giovanna UL; Tirelli, Ezio

in Pflügers Archiv : European Journal of Physiology (1996), 431(3),

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See detailEffects of nicotine transdermally (patch) on attention working memory and mood
Mancuso, Giovanna UL; Andres, Pilard; Tirelli, Ezio et al

in Pflügers Archiv : European Journal of Physiology (1995), 430

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See detailMapping and load balancing on distributed memory systems
Bouvry, Pascal UL; Chassin, J.; Dobrucky, M. et al

in µP'94, Eight Symposium on Computer and Microprocessor Applications (1994)

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See detailAcute monoarthritis of the cat´s knee joint alters the proportion of CGRP-immunoreactive articular afferents
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in Neuropeptides (1994), 26

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See detailCounting the Number of Points on Elliptic Curves over Finite Fields of Characteristic Greater than Three
Lehmann, Frank; Maurer, Markus; Müller, Volker UL et al

in Proceedings of Algorithmic Number Theory Symposium I, Lecture Notes in Computer Science (1994)

The paper describes the implementation of the Algorithm of Atkin and Elkies for computing the group order of elliptic curves over large prime fields. The focus of the paper lays on algorithmical aspects ... [more ▼]

The paper describes the implementation of the Algorithm of Atkin and Elkies for computing the group order of elliptic curves over large prime fields. The focus of the paper lays on algorithmical aspects of the Atkin/Elkies algorithm. Practical data and running times are given. [less ▲]

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See detailEvolution and Neural Networks – Protein Secondary Structure Prediction Above 71% Accuracy
Rost, B.; Sander, C.; Schneider, Reinhard UL

in Proceedings of the 27th Hawaii International Conference on System Sciences, Vol. V, Biotechnology Computing (1994)

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See detailSP-containing nerve fibers and distribution of the NK-1 receptor shown by immunocytochemistry in rat´s dura mater.
Hanesch, Ulrike UL; Meßlinger, Karl; Moussaoui, Saliha et al

in Canadian Journal of Physiology & Pharmacology (1994), 72(Suppl. 2), 46

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See detailImmunocytochemical localization of the NK-1 receptor in the dura mater encephali of the rat
Hanesch, Ulrike UL; Meßlinger, Karl; Moussaoui, Saliha et al

in Neuropeptides (1994), 26

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See detailGeneQuiz: a workbench for sequence analysis
Scharf, M.; Schneider, Reinhard UL; Casari, G. et al

in Proceedings of the Second International Conference on Intelligent Systems for Molecular Biology, ISMB-94 (1994)

We present the prototype of a software system, called GeneQuiz, for large-scale biological sequence analysis. The system was designed to meet the needs that arise in computational sequence analysis and ... [more ▼]

We present the prototype of a software system, called GeneQuiz, for large-scale biological sequence analysis. The system was designed to meet the needs that arise in computational sequence analysis and our past experience with the analysis of 171 protein sequences of yeast chromosome III. We explain the cognitive challenges associated with this particular research activity and present our model of the sequence analysis process. The prototype system consists of two parts: (i) the database update and search system (driven by perl programs and rdb, a simple relational database engine also written in perl) and (ii) the visualization and browsing system (developed under C++/ET++). The principal design requirement for the first part was the complete automation of all repetitive actions: database updates, efficient sequence similarity searches and sampling of results in a uniform fashion. The user is then presented with "hit-lists" that summarize the results from heterogeneous database searches. The expert's primary task now simply becomes the further analysis of the candidate entries, where the problem is to extract adequate information about functional characteristics of the query protein rapidly. This second task is tremendously accelerated by a simple combination of the heterogeneous output into uniform relational tables and the provision of browsing mechanisms that give access to database records, sequence entries and alignment views. Indexing of molecular sequence databases provides fast retrieval of individual entries with the use of unique identifiers as well as browsing through databases using pre-existing cross-references. The presentation here covers an overview of the architecture of the system prototype and our experiences on its applicability in sequence analysis. [less ▲]

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See detailCalcitonin gene-related peptide released from dural nerve fibers mediates increase of meningeal blood flow in the rat
Meßlinger, Karl; Hanesch, Ulrike UL; Kurosawa, Mieko et al

in Canadian Journal of Physiology & Pharmacology (1994), 72

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See detailAdjuvant induced monoarthritis influences SP-mRNA expression in rat dorsal root ganglia
Blecher, Fabian; Hanesch, Ulrike UL; Heppelmann, Bernd et al

in Pflügers Archiv : European Journal of Physiology (1993), 422(Suppl. 1), 50

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See detailUltrastrukturelle Unterscheidung von sympathischen und sensiblen Nervenfasern in Ventrikelmyokard des Schweins.
Schramm, Erhard; Meßlinger, Karl; Hanesch, Ulrike UL et al

in Zeitschrift für Kardiologie (1993), 82(Suppl. 3), 34

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See detailEinfluß einer Entzündung auf die Neuropeptidsynthese in Gelenkafferenzen
Heppelmann, Bernd; Hanesch, Ulrike UL; Schmidt, Robert

in Schmerz (Berlin, Germany) (1993), 7

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See detailPAPADEUS - Parallel Parsing of Ambiguous Sentences
Kemke, Christel; Schommer, Christoph UL

in Proceedings of the World Congress on Neural Networks (1993)

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See detailThe proportion of CGRP-immunoreactive and SP-mRNA containing dorsal root ganglion cells is increased by a unilateral inflammation of the ankle joint of the rat
Hanesch, Ulrike UL; Pfrommer, Ursula; Grubb, Blair et al

in Regulatory Peptides. Supplement (1992), 1

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See detailDistribution of neurokinin A in articular afferents of the cat
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in Pflügers Archiv : European Journal of Physiology (1992), 420(Suppl. 1), 54

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See detailUnilateral inflammation of the rat´s ankle joint increases the proportion of CGRP-immunoreactive dorsal root ganglion cells
Hanesch, Ulrike UL; Pfrommer, Ursula; Grubb, Blair et al

in Neuropeptides (1992), 22(Suppl. 1), 29-30

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See detailEffect of colchicine treatment on neuropeptide immunoreactivity in cat`s primary articular afferents
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in Pflügers Archiv : European Journal of Physiology (1991), 418

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See detailRobust Signal Parameter Estimation in the Presence of Array Perturbations
Wahlberg, B.; Ottersten, Björn UL; Viberg, M.

in Proc. ICASSP 91 Conf (1991)

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See detailA Statistical Perspective on State-Space Modeling Using Subspace Methods
Viberg, M.; Ottersten, Björn UL; Wahlberg, B. et al

in Proc. 30th IEEE Conf. on Decision & Control (1991)

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See detailColocalization of somatostatin and substance P in articular afferents of the cat
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in European Journal of Neuroscience (1991), 4(Suppl. 4), 131

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See detailCGRP-immunoreactive nerve fibers in the dura mater encephali of cat and rat
Hanesch, Ulrike UL; Meßlinger, Karl; Schmidt, Robert

in Pflügers Archiv : European Journal of Physiology (1991), 418

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See detailEstimating the number of nociceptive knee joint afferents containing substance P, somatostatin and neurokinin A
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in European Journal of Neuroscience (1990), 3

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See detailDistribution of somatostatin in primary articular afferents in cat
Hanesch, Ulrike UL; Heppelmann, Bernd; Schmidt, Robert

in Pflügers Archiv : European Journal of Physiology (1990), 415

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See detailAnalysis of Subspace Fitting Based Methods for Sensor Array Processing
Ottersten, Björn UL; Viberg, M.

in Proc. ICASSP 89 (1989)

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See detailGaInAs camel diodes grown by MBE
Marso, Michel UL; Chin, A.; Bhattacharya, P. et al

in Proceedings of the 18th European Solid State Device Research Conference (ESSDERC 88), Montpellier, France, 1988, J. de Physique, Colloque C4, suppl. 9 (1988)

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See detailMorphometrically verified differences between neurons of the thalamic ventral posteromedial nucleus (VPM) and of its ventral periphery (VPMvp)
Brandt, Heike; Brüggemann, Johannes; Hanesch, Ulrike UL et al

in Pflügers Archiv : European Journal of Physiology (1988), 411

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See detailDifferences between neurons in the cat`s thalamic ventroposterolateral nucleus (VPL) and its ventral periphery (VPLvp): a morphometric analysis
Hanesch, Ulrike UL; Haumann, Petra; Kniffki, Klaus-Dietrich et al

in Neuroscience (1987), 22

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