@inproceedings{2263, abstract = {{In this paper, we introduce the Woolcano reconfigurable processor architecture. The architecture is based on the Xilinx Virtex-4 FX FPGA and leverages the Auxiliary Processing Unit (APU) as well as the partial reconfiguration capabilities to provide dynamically reconfigurable custom instructions. We also present a hardware tool flow that automatically translates software functions into custom instructions and a software tool flow that creates binaries using these instructions. While previous research on processors with reconfigurable functional units has been performed predominantly with simulation, the Woolcano architecture allows for exploring dynamic instruction set extension with commercially available hardware. Finally, we present a case study demonstrating a custom floating-point instruction generated with our approach, which achieves a 40x speedup over software-emulated floating-point operations and a 21% speedup over the Xilinx hardware floating-point unit. }}, author = {{Grad, Mariusz and Plessl, Christian}}, booktitle = {{Proc. Int. Conf. on Engineering of Reconfigurable Systems and Algorithms (ERSA)}}, isbn = {{1-60132-101-5}}, pages = {{319--322}}, publisher = {{CSREA Press}}, title = {{{Woolcano: An Architecture and Tool Flow for Dynamic Instruction Set Extension on Xilinx Virtex-4 FX}}}, year = {{2009}}, } @inbook{64682, author = {{Glöckner, Helge}}, booktitle = {{Generalized Lie theory in mathematics, physics and beyond}}, isbn = {{978-3-540-85331-2}}, keywords = {{46G20, 46A99, 47A07}}, pages = {{171–186}}, publisher = {{Berlin: Springer}}, title = {{{Applications of hypocontinuous bilinear maps in infinite-dimensional differential calculus}}}, doi = {{10.1007/978-3-540-85332-9_16}}, year = {{2009}}, } @article{64681, author = {{Glöckner, Helge and Lucht, Lutz G. and Porubský, Štefan}}, issn = {{0039-3223}}, journal = {{Studia Mathematica}}, keywords = {{11A25, 44A10, 46H30}}, number = {{2}}, pages = {{109–129}}, title = {{{General Dirichlet series, arithmetic convolution equations and Laplace transforms}}}, doi = {{10.4064/sm193-2-2}}, volume = {{193}}, year = {{2009}}, } @article{62793, author = {{Unger, J. and Ostwald, Richard and Svendsen, B.}}, issn = {{1960-6206}}, journal = {{International Journal of Material Forming}}, number = {{S1}}, pages = {{907--910}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Thermodynamic multifield modeling of electromagnetic metal forming}}}, doi = {{10.1007/s12289-009-0486-9}}, volume = {{2}}, year = {{2009}}, } @misc{23771, author = {{Fechner, Sabine and Treagust, David F.}}, booktitle = {{International Journal of Science Education}}, number = {{4}}, pages = {{596--601}}, title = {{{Making it relevant: Context-based learning of science [Book review]}}}, volume = {{31}}, year = {{2009}}, } @article{18632, abstract = {{We present measurements of the effective electron mass in biaxial tensile strained silicon on insulator (SSOI) material with 1.2 GPa stress and in unstrained SOI. Hall-bar metal oxide semiconductor field effect transistors on 60 nm SSOI and SOI were fabricated and Shubnikov–de Haas oscillations in the temperature range of T=0.4–4 K for magnetic fields of B=0–10 T were measured. The effective electron mass in SSOI and SOI samples was determined as mt=(0.20±0.01)m0. This result is in excellent agreement with first-principles calculations of the effective electron mass in the presence of strain.}}, author = {{Feste, Sebastian F. and Schäpers, Thomas and Buca, Dan and Zhao, Qing Tai and Knoch, Joachim and Bouhassoune, Mohammed and Schindlmayr, Arno and Mantl, Siegfried}}, issn = {{1077-3118}}, journal = {{Applied Physics Letters}}, number = {{18}}, publisher = {{American Institute of Physics}}, title = {{{Measurement of effective electron mass in biaxial tensile strained silicon on insulator}}}, doi = {{10.1063/1.3254330}}, volume = {{95}}, year = {{2009}}, } @inproceedings{18634, abstract = {{A computational method to obtain optical conductivities from first principles is presented. It exploits a relation between the conductivity and the complex dielectric function, which is constructed from the full electronic band structure within the random-phase approximation. In contrast to the Drude model, no empirical parameters are used. As interband transitions as well as local-field effects are properly included, the calculated spectra are valid over a wide frequency range. As an illustration I present quantitative results for selected simple metals, noble metals, and ferromagnetic transition metals. The implementation is based on the full-potential linearized augmented-plane-wave method.}}, author = {{Schindlmayr, Arno}}, booktitle = {{Theoretical and Computational Nanophotonics: Proceedings of the 2nd International Workshop}}, editor = {{Chigrin, Dmitry N.}}, isbn = {{978-0-7354-0715-2}}, issn = {{1551-7616}}, location = {{Bad Honnef}}, number = {{1}}, pages = {{157--159}}, publisher = {{American Institute of Physics}}, title = {{{Optical conductivity of metals from first principles}}}, doi = {{10.1063/1.3253897}}, volume = {{1176}}, year = {{2009}}, } @article{18636, abstract = {{We derive formulas for the Coulomb matrix within the full-potential linearized augmented-plane-wave (FLAPW) method. The Coulomb matrix is a central ingredient in implementations of many-body perturbation theory, such as the Hartree–Fock and GW approximations for the electronic self-energy or the random-phase approximation for the dielectric function. It is represented in the mixed product basis, which combines numerical muffin-tin functions and interstitial plane waves constructed from products of FLAPW basis functions. The interstitial plane waves are here expanded with the Rayleigh formula. The resulting algorithm is very efficient in terms of both computational cost and accuracy and is superior to an implementation with the Fourier transform of the step function. In order to allow an analytic treatment of the divergence at k=0 in reciprocal space, we expand the Coulomb matrix analytically around this point without resorting to a projection onto plane waves. Without additional approximations, we then apply a basis transformation that diagonalizes the Coulomb matrix and confines the divergence to a single eigenvalue. At the same time, response matrices like the dielectric function separate into head, wings, and body with the same mathematical properties as in a plane-wave basis. As an illustration we apply the formulas to electron-energy-loss spectra (EELS) for nickel at different k vectors including k=0. The convergence of the spectra towards the result at k=0 is clearly seen. Our all-electron treatment also allows to include transitions from 3s and 3p core states in the EELS spectrum that give rise to a shallow peak at high energies and lead to good agreement with experiment.}}, author = {{Friedrich, Christoph and Schindlmayr, Arno and Blügel, Stefan}}, issn = {{0010-4655}}, journal = {{Computer Physics Communications}}, number = {{3}}, pages = {{347--359}}, publisher = {{Elsevier}}, title = {{{Efficient calculation of the Coulomb matrix and its expansion around k=0 within the FLAPW method}}}, doi = {{10.1016/j.cpc.2008.10.009}}, volume = {{180}}, year = {{2009}}, } @inbook{65341, author = {{Droß-Krüpe, Kerstin and Schmidt, Stefanie and Bärmann, Christian and Bäcker, Sarah}}, booktitle = {{Alte Geschichte multimedial: Analyse, Realisierung und Evaluation}}, editor = {{Timoschenko, T. and Meier, A. and Schäfer, Chr. }}, pages = {{9--24}}, title = {{{Hassia Exploranda. Geschichte erleben in Hessen}}}, volume = {{8}}, year = {{2009}}, } @article{66781, abstract = {{Schooling and school management can play an important part in promoting inclusive forms of national attachment, intercultural dialogue and reflexive engagements with the “Unfamiliar”. The (inter) personal benefits of intercultural experiences and skills are widely acknowledged. But can we really learn to be intercultural? And what are the prospects of attachment beyond narrow ethno‐national boundaries for less privileged members of society? These questions lie at the heart of the present article. Conceptually, the article draws on Bourdieu's notions of habitus and cultural capital. Within this framework, I regard people's attachments to country (and beyond) as learned and habituated, yet open to modification and reconstruction through reflexive agency, educational practices and the acquisition of intercultural capital.}}, author = {{Pöllmann, Andreas}}, issn = {{0305-5698}}, journal = {{Educational Studies}}, number = {{5}}, pages = {{537--545}}, publisher = {{Informa UK Limited}}, title = {{{Formal education and intercultural capital: Towards attachment beyond narrow ethno‐national boundaries?}}}, doi = {{10.1080/03055690902880240}}, volume = {{35}}, year = {{2009}}, } @inproceedings{1108, abstract = {{Ce papier présente le contexte linguistique et la modélisation de notre système iBeCOOL (Informations Biographiques Extraites à l’aide de COntextes Observés Linguistiquement) dédié à l’extraction d’informations biographiques dans les textes de la presse financière en langue anglaise. La notion d’événement biographique (tel que la naissance, le mariage, la carrière professionnelle) est caractérisée formellement par un schéma prédicatif à plusieurs arguments dont l’un étant une instance de la classe d’objets . Notre approche consiste à décrire ces types de relations à l’aide de grammaires locales etde lexiques terminologiques. Nos résultats montrent que cette approche semble viable et nous poussent à élargir cette étude par l’analyse de nouveaux genres textuels.}}, author = {{Geierhos, Michaela and Blanc, Olivier and Bsiri, Sandra}}, booktitle = {{Proceedings of the Lexis and Grammar Conference 2008}}, keywords = {{extraction d’informations biographiques, elations sémantiques, grammaires locales, entités nommées, enrichissement du lexique}}, location = {{L'Aquila, Italy}}, pages = {{241--248}}, title = {{{iBeCOOL - Extraction d'informations biographiques dans les textes financiers}}}, year = {{2008}}, } @inbook{1109, author = {{Geierhos, Michaela and Bsiri, Sandra}}, booktitle = {{Linguistics, Computer Science and Language Processing: Festschrift for Franz Guenthner on the Occasion of His 60th Birthday (Tributes 6)}}, editor = {{Gross , Gaston and Schulz, Klaus U.}}, isbn = {{978-1-904987-80-2}}, pages = {{103--126}}, publisher = {{College Publications}}, title = {{{ProfilPro: Reconstitution automatique d'un profil professionnel à partir des documents du Web}}}, volume = {{6}}, year = {{2008}}, } @article{9569, abstract = {{Ultrasonic hyperthermia and thermo-ablation are two promising alternatives for local overheating of deep-seated human tumours. After a short characterisation of the two techniques and the identification of the main parameters, results of an analytical theory of local heat up, cooling, and heat diffusion are presented. The theory is based on a spherical model for hyperthermia with a critical thermal dose and on a cylinder-symmetrical model for thermo-ablation with a critical temperature threshold for thermal toxicity and cell death through coagulative necrosis. Two representative hard ware concepts are discussed. The hyperthermia applicator consists of a MHz transducer, which rotates concentrically in a water filled capsule with acoustically transparent window, and radiates collimated or focussed ultrasound under 45$\,^{\circ}$ into a concentric target area of nearly spherical symmetry. The applicator for thermo-ablation is a MHz transducer which radiates high intensity focussed ultrasound (HIFU) into "cigar shaped" target areas at the focal zone. Typical therapy diagrams for both techniques are presented. They show therapeutic target volumes as functions of the therapy time with the peak temperature or the radiated acoustic power as parameters. These diagrams are discussed under consideration of power requirement, maximal sound intensity, and power efficiency at close to optimized frequency conditions.}}, author = {{Lierke, Ernst-Günter and Hemsel, Tobias}}, journal = {{Acta Acustica united with Acustica}}, number = {{3}}, pages = {{369--381}}, title = {{{Local Ultrasonic Hyperthermia and Thermo-ablation: A Description and Theoretical Evaluation of Two Alternative Concepts for the Heat Therapy of Tumours}}}, doi = {{10.3813/AAA.918044}}, volume = {{94}}, year = {{2008}}, } @article{9571, abstract = {{Several positioning tasks demand translatory drive instead of rotary motion. To achieve drives that are capable, e.g., to drive the sunroof of a car or to lift a car's window, multiple miniaturized motors can be combined. But in this case many other questions arise: The electromechanical behavior of the individual motors differs slightly, the motor characteristics are strongly dependent on the driving parameters and the driven load, many applications need some extra power for special cases like overcoming higher forces periodically. Thus, the bundle of motors has to act well-organized and at last controlled to get an optimized drive that is not oversized and costly.}}, author = {{Mracek, Maik and Hemsel, Tobias and Sattel, Thomas and Vasiljev, Piotr and Wallaschek, Jörg}}, issn = {{1385-3449}}, journal = {{Journal of Electroceramics}}, keywords = {{Ultrasonic linear motor, High power, Control, Modeling, Characteristics}}, number = {{3-4}}, pages = {{153--158}}, publisher = {{Springer US}}, title = {{{Driving concepts for bundled ultrasonic linear motors}}}, doi = {{10.1007/s10832-007-9123-5}}, volume = {{20}}, year = {{2008}}, } @article{9574, abstract = {{For devices having non-linear contact, load plays a fundamental role. Variations in the characteristics of the load cause change in eigenfrequency and amplitude of the vibration. In most technical applications, this unwanted behaviour is cancelled by the use of control algorithms. However, multiple applications, like bond quality monitoring or chemical and pressure sensors, have found that the load may be characterised by interpreting the change in characteristics of a resonant vibrating device used as a sensor. Surgical resection of tumours is a very difficult task. After localising the tumour by the use of imaging techniques, the resection demands the surgeon to decide where and what to resect based on visual and tactile differentiation of tumour and healthy tissue. Exactness of this process could be enhanced if we can provide the surgeon with a device capable of evaluating mechanical characteristics of the tissue much more accurately than the surgeon himself can do. As the mechanical characteristics of tumour and healthy tissue differ but slightly, the task is to design a system with high sensitivity. Therefore, we have developed a resonant actuator-sensor that allows the differentiation among distinct media that have similar mechanical characteristics to tumour and healthy tissue using a piezoelectric bimorph. The design is based on the detection and evaluation of frequency shift and amplitude variation of the fundamental and higher harmonics using one layer for the resonant excitation of vibration and the other one as the sensing element.}}, author = {{Stroop, Ralf and Uribe, David Oliva and Martinez, Melisa Orta and Brökelmann, Michael and Hemsel, Tobias and Wallaschek, Jörg}}, issn = {{1385-3449}}, journal = {{Journal of Electroceramics}}, keywords = {{Piezo ceramics, Bimorph, Tactile sensor, Tumour tissue}}, number = {{3-4}}, pages = {{237--241}}, publisher = {{Springer US}}, title = {{{Tactile tissue characterisation by piezoelectric systems}}}, doi = {{10.1007/s10832-007-9183-6}}, volume = {{20}}, year = {{2008}}, } @article{9575, abstract = {{Many ultrasonic processes are based on the mechanical contact of oscillating parts. Within ultrasonic machining (drilling, milling, grinding) micro impacts lead to abrasion at the processed workpiece and hopefully do not damage the tool. In ultrasonic motors ideally neither part gets worn. Thus the appropriate design of contact partners as well as their kinematics is a substantial task during the development of such devices. A first step to optimize contact mechanics is to understand their behavior and dependencies on parameter variations, such as vibration amplitude and pre-stress of the impacting parts. For a detailed understanding models validated with convincing experimental data from measurements are absolutely essential. This paper focuses on simple vibro-impact experiments which can be used as benchmark data for future models. The setup of the experiment and first experimental investigations are described in detail.}}, author = {{Twiefel, Jens and Potthast, Christian and Mracek, Maik and Hemsel, Tobias and Sattel, Thomas and Wallaschek, Jörg}}, issn = {{1385-3449}}, journal = {{Journal of Electroceramics}}, keywords = {{Contact measurements, Vibro-impact, Ultrasonic application}}, number = {{3-4}}, pages = {{209--214}}, publisher = {{Springer US}}, title = {{{Fundamental experiments as benchmark problems for modeling ultrasonic micro-impact processes}}}, doi = {{10.1007/s10832-007-9169-4}}, volume = {{20}}, year = {{2008}}, } @inproceedings{9576, abstract = {{In neurosurgery, delineation of tumor boundaries during resection of brain tumors is of substantial relevance. During operation distinction between tumor and healthy tissue rely on the abilities of the surgeon based on visual and tactile differentiation. In this paper a high sensitivity actuator-sensor system using a piezoelectric bimorph is presented. Frequency shift and transfer function of the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity is evaluated using two frequency controls strategies: A phase-locked loop (PLL) and a self-oscillating circuit. Results of measurements conducted on gel-phantoms are presented and discussed.}}, author = {{Uribe, David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}}, booktitle = {{Frequency Control Symposium, 2008 IEEE International}}, issn = {{1075-6787}}, keywords = {{biomedical measurement, brain, cancer, neurophysiology, phantoms, phase locked loops, piezoelectric actuators, surgery, tactile sensors, transfer functions, tumours, PLL, biomedical tissue differentiation system, brain tumor resection, frequency control, frequency shift, gel-phantom, high sensitivity actuator-sensor system, neurosurgery, phase-locked loop, piezoelectric actuators, piezoelectric bimorph, self-oscillating circuit, sensor sensitivity, tactile differentiation, tactile sensor system, transfer function, tumor boundary, visual differentiation, Biomedical measurements, Circuits, Frequency control, Neoplasms, Neurosurgery, Phase locked loops, Piezoelectric actuators, Surges, Transfer functions, Voltage}}, pages = {{91--94}}, title = {{{Development of a biomedical tissue differentiation system using piezoelectric actuators}}}, doi = {{10.1109/FREQ.2008.4622963}}, year = {{2008}}, } @article{1169, abstract = {{The standard approach of job search engines disregards the structural aspect of job announcements in the Web. Bag-of-words indexing leads to a high amount of noise. In this paper we describe a method that uses local grammars to transform unstructured Web pages into structured forms. Evaluation experiments show high efficiency of information access to the generated documents.}}, author = {{Bsiri, Sandra and Geierhos, Michaela and Ringlstetter, Christoph}}, issn = {{1870-4069}}, journal = {{Research in Computing Science}}, pages = {{201--212}}, publisher = {{National Polytechnic Institute of Mexico}}, title = {{{Structuring Job Search via Local Grammars}}}, volume = {{33}}, year = {{2008}}, } @inbook{28076, author = {{Bloh, Bea and Gieske, Mario and Rolff, H.-G}}, booktitle = {{Jahrbuch der Schulentwicklung}}, editor = {{Bos, W. and Holtappels, H.-G. and Pfeiffer, H. and Rolff, H.-G. and Schulz-Zander, R.}}, pages = {{125--148}}, publisher = {{Juventa}}, title = {{{Herausforderungen an Schulleitung. Verteilung von Verantwortung und Aufgaben}}}, volume = {{15}}, year = {{2008}}, } @article{28073, author = {{Bloh, Bea and van Ophuysen, Stefanie}}, journal = {{Zeitschrift für Erziehungswissenschaft}}, number = {{4}}, pages = {{626--647}}, title = {{{Was bedingt die Wahl eines nicht empfohlenen höheren Bildungsgangs? Zeitschrift für Erziehungswissenschaft, 11, 626-647}}}, doi = {{10.1007/s11618-008-0037-z}}, volume = {{11}}, year = {{2008}}, }