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Feature Selection with Acquisition Cost for Optimizing Sensor Syst...

By: A. Koenig; K. Iswandy

Description: Institute of Integrated Sensor Systems, University of Kaiserslautern, Erwin-Schroedinger-Str., 67663 Kaiserslautern, Germany. Selection of variables from large sets of measurements is a common problem of data analysis and signal processing in many disciplines. In engineering and sensor technology the design of recognition systems can be optimized by judicious choice of subsets of relevant features. In particular, the effort required for signal processing...

Agrafiotis, D K. and Cedeno, W J.: Feature Selection for Structure - Activitiy Correlation Using Binary Particle Swarms, J. Med. Chem., 45, 1098–1107, 2002; Aha, D W.: Feature Weighting for Lazy Learning Algorithms, edited by: Liu and Motoda, Kluwer Acad. Publ., 13–29, 1998.; Goldberg, D E.: Genetic Algorithms in Search, Optimization, and Machine Learning, Addison-Wesley Publishing Comp. Inc., 1989.; Iswandy, K., Koenig, A., Fricke, T., Baumbach, M., and Schuetze, A.: To...

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Cyber-physical Networking for Wireless Mesh Infrastructures : Volu...

By: A. Klein; H. D. Schotten; J. Schneider; C. Lottermann; C. Mannweiler

Description: Chair for Wireless Communications and Navigation, University of Kaiserslautern, Germany. This paper presents a novel approach for cyber-physical network control. Cyber-physical refers to the inclusion of different parameters and information sources, ranging from physical sensors (e.g. energy, temperature, light) to conventional network information (bandwidth, delay, jitter, etc.) to logical data providers (inference systems, user profiles, spectrum usag...

Badawy, G. H., Sayegh, A. A., and Todd, T. D.: Energy Aware Provisioning in Solar Powered WLAN Mesh Networks. Proceedings of 17th International Conference on Computer Communications and Networks (ICCCN), St. Thomas, U.S. Virgin Islands, 2008.; Chan, T. F., Cong, J., Shinnerl, J. R., Sze, K., Xie, M., and Zhang, Y.: Multiscale Optimization in VLSI Physical Design Automation, in: Multiscale optimization methods and applications, edited by: Hager, W. W., Huang, S.-J., Parda...

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A Hybrid Method Combining the Fdtd and a Time Domain Boundary-inte...

By: A. Becker; V. Hansen

Description: Lehrstuhl für Theoretische Elektrotechnik der Universität Wuppertal, Rainer-Gruenter-Str. 21, 42119 Wuppertal, Germany. In this paper a hybrid method combining the FDTD/FIT with a Time Domain Boundary-Integral Marching-on-in-Time Algorithm (TD-BIM) is presented. Inhomogeneous regions are modelled with the FIT-method, an alternative formulation of the FDTD. Homogeneous regions (which is in the presented numerical example the open space) are modelled usi...

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Newest Developments of Acmant : Volume 6, Issue 1 (31/01/2011)

By: R. Poza; D. Efthymiadis; P. Domonkos

Description: Centre for Climate Change (C3), Geography Dept., University Rovira i Virgili, Campus Terres de l'Ebre, C/Betánia 5 Tortosa, 43500 Spain. The seasonal cycle of radiation intensity often causes a marked seasonal cycle in the inhomogeneities (IHs) of observed temperature time series, since a substantial portion of them have direct or indirect connection to radiation changes in the micro-environment of the thermometer. Therefore the magnitudes of temperature...

Caussinus, H. and Lyazrhi, F.: Choosing a linear model with a random number of change-points and outliers, Ann. Inst. Statist. Math., 49/4, 761–775, doi:10.1023/A:1003230713770, 1997.; Caussinus, H. and Mestre, O.: Detection and correction of artificial shifts in climate series, J. Roy. Stat. Soc., Series C53, 405–425, doi:10.1111/j.1467-9876.2004.05155.x, 2004.; Domonkos, P.: Testing of homogenisation methods: purposes, tools and problems of implementation, Proceedings ...

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Accurate Modeling of High Frequency Microelectromechanical Systems...

By: M. Farina; P. Russer; F. Coccetti; W. Dressel; L. Pierantoni; T. Rozzi

Description: Technische Universität München, Lehrstuhl für Hochfrequenztechnik, Munich, Germany. In this contribution we present an accurate investigation of three different techniques for the modeling of complex planar circuits. The em analysis is performed by means of different electromagnetic full-wave solvers in the timedomain and in the frequency-domain. The first one is the Transmission Line Matrix (TLM) method. In the second one the TLM method is combined wi...

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Attenuation Correction for a High-resolution Polarimetric X-band W...

By: T. Otto; H. W. J. Russchenberg

Description: Remote Sensing of the Environment, International Research Centre for Telecommunications and Radar (IRCTR), Department of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft, The Netherlands. In 2007, IRCTR (Delft University of Technology) installed a new polarimetric X-band LFMCW radar (IDRA) at the meteorological observation site of Cabauw, The Netherlands. It provides plan position indicators (PPI) at a fixed ...

Hitschfeld, W. and Bordan, J.: Errors inherent in the radar measurement of rainfall at attenuating wavelengths, J. Meteorol., 11, 58–67, 1954.; Bringi, V N. and Chandrasekar, V.: Polarimetric Doppler Weather Radar, p. 410, Cambridge University Press, 1st edn., 2001.; Bringi, V N., Chandrasekar, V., Balakrishnan, N., and Zrnić, D S.: An Examination of Propagation Effects in Rainfall on Radar Measurements at Microwave Frequencies, J. Atmos. Oceanic Technol., 7, 829–840, 19...

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Traceable Electric and Magnetic Field Calibrations of Radiation Mo...

By: K. Münter; T. Schrader; T. Kootz

Description: DARC – Deutscher Amateur Radio Club, Baunatal, Germany. In many countries the electromagnetic field strength in the proximity of licensed amateur radio stations is limited to ensure public safety. If the station antenna(s) and/or the environmental situation are complex, only measurement results are acceptable as proof, and proper calibration of the field strength meters (radiation monitors) is mandatory. A system and a procedure are described here, enab...

Bundesnetzagentur für Elektrizität, Gas, Telekommunikation, Post und Eisenbahnen (BNetzA): BEMFV – Verordnung zur Beschränkung elektromagnetischer Felder (www.bundesnetzagentur.de), 2002.; BNetzA: Anleitung zur Durchführung der Anzeige ortsfester Amateurfunkanlagen nach §9 der Verordnung zur Beschränkung elektromagnetischer Felder (BEMFV), 2002.; Crawford M. L.: Generation of standard EM fields using TEM transmission cells, IEEE Trans. EMC, EMC-16, 189–195, 1974.; Glimm ...

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An Accelerated Hybrid Tlm-ie Method for the Investigation of Shiel...

By: P. Russer; N. Fichtner

Description: Institute for High Frequency Engineering, Technische Universität München, Arcisstr. 21, 80333 München, Germany. A hybrid numerical technique combining time-domain integral equations (TD-IE) with the transmission line matrix (TLM) method is presented for the efficient modeling of transient wave phenomena. This hybrid method allows the full-wave modeling of circuits in the time-domain as well as the electromagnetic coupling of remote TLM subdomains u...

Tai, C.-T.: Direct Integration of Field Equations, Progress in Electromagn. Research, 28, 339–359, 2000.; Balanis, C.: Antenna Theory – Analysis and Design, John Wiley & Sons, 2nd edn., 1997.; Chew, W., Michielssen, E., Song, J M., and Jin, J M.: Fast and Efficient Algorithms in Computational Electromagnetics, Artech House, Norwood, MA, USA, 2001.; Ergin, A., Shanker, B., and Michielssen, E.: The Plane-Wave Time Domain Algorithm for the Fast Analysis of Transient Wave Ph...

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Modellierung Von Quanteneffekten in Einem Ladungsbasierten Mos-tra...

By: S. Stegemann; W. Mathis; J. Xiong

Description: Leibniz Universität Hannover, Institut für theoretische Elektrotechnik, Appelst. 9A, 30167 Hannover, Deutschland. Aufgrund der fortschreitenden Miniaturisierung der Bauelemente in CMOS-Schaltungen und den dadurch erreichten Strukturgrößen nehmen quantenmechanische Effekte zunehmenden Einfluss auf die Funktion von Transistoren und damit auf die gesamte Schaltung. Unter Einbeziehung der Energiequantisierung an der Si/SiO2-Grenzfläche wird unters...

Datta, S.: Electronic Transport in Mesoscopic Systems, Cambridge University Press, p 56, 1995.; Datta, S.: Quantum Transport – Atom to Transistor, Cambridge University Press, 3–11, 2005.; van Langevelde, R. and Klaassen, F. M.: An explicit surface-potential-based MOSFET model for circuit simulation, Solid State Electron., 44, 409–418, 2000.; Lundstrom, M.: Elementary scattering theory of the Si MOSFET, IEEE Electr. Device L., 18(7), 361–363, July 1997.; Lundstrom, M. and...

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Verification of Electromagnetic Field Measurements Via Inter-labor...

By: H. Brüggemeyer; P. Weiß; M. Mann

Description: University of Kaiserslautern, Department Of Electrical Engineering, Chair Of High-Voltage-Engineering And EMC, P.O. Box 3049, 67663 Kaiserslautern, Germany. An inter-laboratory comparison of field strength measurements was conducted in order to verify the comparability of high-frequency electromagnetic field measurements. For this purpose, 17 participating teams hosted by the working group procedures of exposure determination of the LAI (Länderau...

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The New Era of Large Paraboloid Antennas: the Life of Prof. Dr. Ot...

By: R. Wielebinski

Description: Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, German. Seldom does a scientist get an opportunity in his lifetime to build an instrument that remains unchallenged as the world’s no. 1 for 30 years. The Effelsberg 100- m radio telescope, constructed under the direction of Prof. Dr. Otto Hachenberg, was the world’s largest fully steerable paraboloid antenna since its inauguration in 1971. The radio telescope in a valley in the Ei...

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Design of Rf Mems Based Switch Matrix for Space Applications : Vol...

By: R. Marcelli; P. Farinelli; T. Kim; E. Paola; B. Margesin; D. Pochesci; S. Di Nardo; F. Vitulli; L. Vietzorreck

Description: ThalesAlenia Space, L'Aquila, Italy. RF MEMS based switch matrices have several advantages compared to the mechanical or solid-state switch based ones for space applications. They are compact, light and less lossy with a high linearity up to high frequency. In this work, a 12 × 12 switch matrix with RF MEMS and LTCC technologies is presented based on the planar Beneš network. The simulated performance of the 12 × 12 switch matrix is below −12 dB IL (In...

Chang, C. and Melhem, R.: Arbitrary Size Benes Networks, J. Parallel Process. Lett., 7, 279–284, 1997.; Chao, H. J. and Liu, B.: High performance switches and routers, John Wiley & Sons, Inc., Hoboken, New Jersey, USA, 2007.; De Angelis, G., Lucibello, A., Proietti, E., Marcelli, R., Bartolucci, G., Casini, F., Farinelli, P., Mannocchi, G., Di Nardo, S., Pochesci, D., Margesin, B., Giacomozzi, F., Vendier, O., Kim, T., and Vietzorreck, L.: RF MEMS ohmic switches for matr...

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Warning! the Use of Meteorological Information During a Flash-floo...

By: L. Créton-cazanave

Description: Institut de Géographie Alpine, Université de Grenoble, 14bis avenue Marie Reynoard, 38000 Grenoble, France. Warning is a key issue to reduce flash floods impacts. But, despite many studies, local and national authorities still struggle to issue good flash floods warnings. We will argue that this failure results from a classical approach of warnings, based on a strict separation between the assessment world and the action world. We will go f...

Becker, H S.: Art worlds, University of California Press, 1984.; Carsell, K M., Pingel, N. D., and Ford, D. T.: Quantifying the benefit of a flood warning system, Nat. Hazards Rev., 5, 131–140, 2004.; Chateauraynaud, F. and Torny, D.: Les sombres précurseurs: une sociologie pragmatique de l'alerte et du risque, EHESS, 1999.; Demuth, J L., Gruntfest, E., Morss, R E., Drobot, S., and Lazo, J K.: WAS*IS: Building a Community for Integrating Meteorology and Social Science, B...

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Validation of a Measurement Method for Magnetic Shielding Effectiv...

By: M. Kühn; R. Weigel; W. John

Description: AUDI AG, 85045 Ingolstadt Germany. This paper deals with the validation of a measurement method for determining the magnetic shielding effectiveness of a wire mesh enclosure in the frequency range from 10 kHz to 150 kHz. The comparison with an analytical model (parallel-plate-shield, see Kaden, 1959) for magnetic shielding effectiveness of wire mesh is also part of this contribution. To measure the shielding effectiveness of an enclosure in general, two...

Kaden, H.: Wirbelströme und Schirmung in der Nachrichtentechnik, Springer-Verlag, 2. Auflage, 1959.; DIN EN 61000-5-7; Elektromagnetische Verträglichkeit (EMV) – Teil 5–7: Installationsrichtlinien und Abhilfemaßnahmen; Schutzarten durch Gehäuse gegen elektromagnetische Störgrößen (EM-Code), Beuth Verlag, 2001.; CISPR 25; Vehicles, boats and internal combustion engines-Radio disturbance characteristics-Limits and methods of measurement for the protection of on-board recei...

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The Archive and Library of the Former Italian Central Office for M...

By: L. Iafrate; S. Esposito; M. C. Beltrano

Description: Unità di Ricerca per la Climatologia e la Meteorologia applicate all'Agricoltura, Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Roma, Italy. The Paper Archive and Library of CRA-CMA (Agricultural Research Council – Research Unit for Climatology and Meteorology applied to Agriculture) are an important source of meteorological data for climate research.

CRA-CMA's Paper Archive gathers a collection of about 850 historical meteorolo...

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Prototype of a Drought Monitoring and Forecasting System for the T...

By: L. Angeli; M. Pasqui; M. Chiesi; R. Magno

Description: LaMMA Consortium, Sesto Fiorentino, Florence, Italy. A system for drought monitoring and medium–long time forecasting in the Tuscany region (central Italy) is briefly introduced, which is based on ground and satellite data (1 km spatial resolution and 16-day temporal resolution). It is also shown how information about current conditions and future evolution of a drought event is periodically delivered on the LaMMA Consortium website, in collaboration wi...

Byun, H. R. and Wilhite, D. A.: Objective Quantification of Drought Severity and Duration, J. Climate, 12, 2747–2756, 1999.; Brown, J. F., Wardlow, B. D., Tadesse, T., Hayes, M. J., and Reed, B. C.: The Vegetation Drought Response Index (VegDRI): A New Integrated Approach for Monitoring Drought Stress in Vegetation, GIScience & Remote Sensing, 45, 16–46, 2008.; Chiesi, M., Rapi, B., Battista, P., Fibbi, L., Gozzini, B., Magno, R., Raschi, A., and Maselli, F.: Combination...

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Determining the Accuracy of Gridded Climate Data and How This Vari...

By: T. P. Legg

Description: National Climate Information Centre, Met Office, Exeter, UK. The Met Office National Climate Information Centre regularly produces assessments of mean monthly, seasonal and annual values of weather parameters and their anomalies over the UK. However the gridded values, and corresponding areal-average values, are subject to error. Experiments have been done in an attempt to quantify the mean errors in gridded monthly values and monthly areal averages of t...

Parker, D. E.: Uncertainties in early Central England Temperatures, Int. J. Clim., 30, 1105–1113, 2010.; Perry, M. and Hollis, D.: The generation of monthly gridded datasets for a range of climatic variables over the UK, Int. J. Clim., 25, 1041–1054, 2005.

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A Torsional Sensor for Mems-based Rms Voltage Measurements : Volum...

By: R. Judaschke; S. Büttgenbach; J. Dittmer

Description: Institute for Microtechnology, Technische Universität Braunschweig, Germany. RF voltage measurement based on electrostatic RMS voltage-to-force conversion is an alternative method in comparison to the conventional thermal power dissipation method. It is based on a mechanical force induced by an RF voltage applied to a micro-mechanical system. For a theoretically adequate resolution and high precision measurements, the necessary geometrical dimensions o...

Bartek, M., Xiao, Z., van Mullem, C., and Wolffenbuttel, R.: Bulk-micromachined electrostatic RMS-to-DC converter: Design and fabrication, in: Tech. digest MME 2000, 1–3 October, Uppsala, Sweden, p. A14, 2000.; Beissner, S., Wogersien, A., Buttgenbach, S., Schrader, T., and Stumper, U.: Micromechanical device for the measurement of the RMS value of high-frequency voltages, Sensors, 2003, Proc. IEEE, 1, 631–635, 2003.; Dittmer, J., Judaschke, R., and Büttgenbach, S.: Aufb...

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Long-period Upper Mesosphere Temperature and Plasma Scale Height V...

By: C. Jacobi; D. Kürschner

Description: Institute for Meteorology, University of Leipzig, Stephanstr. 3, 04103 Leipzig, Germany. The change of ionospheric absolute reflection heights h of low-frequency (LF) radio waves at oblique incidence in the course of the day is measured at Collm Observatory (51.3° N, 13.0° E) using 1.8 kHz sideband phase comparisons between the sky-wave and the ground wave of a commercial 177 kHz transmitter (Zehlendorf, reflection point at 52.1° N, 13.2° E). Plasma scale h...

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Power Optimization of Digital Baseband Wcdma Receiver Components o...

By: U. Langmann; S. Hessel; M. Bücker; M. Schämann

Description: Institute of Integrated Systems, Ruhr-University Bochum, Germany. High data rates combined with high mobility represent a challenge for the design of cellular devices. Advanced algorithms are required which result in higher complexity, more chip area and increased power consumption. However, this contrasts to the limited power supply of mobile devices.

This presentation discusses the application of an HSDPA receiver which has been optimized ...

3rd Generation Parnetship Project (3GPP): TS 25.101 V6.0.0: UE Radio Transmission and Reception (FDD), Technical specification, 3rd Generation Partnership Project, Release 6, March 2003.; Hausner, J.: Integrated Circuits for Next Generation Wireless System, European Solid-State Circuits Conference (ESSCIRC), Villach, Austria, September 2001.; Guo, Y.,~McCain, D., and Cavallaro, J R.: Low Power VLSI Architecture for Adaptive MAI Suppression in CDMA Using Multi-Stage Conve...

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