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International Radar Symposium (IRS)

作者： Andy Stove Gaspare Galati Francesco De Palo Christoph Wasserzier A. Yasin Erdogan Kubilay Savci Konstantin Lukin School of Electronic Electrical and Systems Engineering University of Birmingham Birmingham UK Passive Radar and Anti-Jamming Techniques Fraunhofer Institute for High for High Frequency Physics and Radar Techniques FHR Wachtberg GERMANY Dept. of Electronic Engineering Tor Vergata University Rome ITALY Electronic Systems Development Department Turkish Navy Research Center Command Pendik/Istanbul TURKEY LNDES IRENASU Kharkov UKRAINE

ISBN: (纸本)9781509025190

The NATO SET-225 Research Group is planning a series of live trials of Noise Radar technology to be performed in summer, 2016 at the fraunhofer FHR institute in Wachtberg (near Bonn). The preliminary architecture of the Demonstrator to be used in these trials is described starting from aims and requirements and arriving to define the main system functions, the parameters and the signal processor. It results that this low-cost demonstrator, although mostly implemented using commercial (or anyway, available) equipment and components, will be functionally close enough to a fully-developed operational Noise Radar system as much as to allow us to assess the potential performance of the operational radar, together with the potential plan and effort required to deliver such a system.

关键词： Radar antennas Radar cross-sections Gain Bandwidth Azimuth

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Synthesis and evaluation of new hyperbranched alkyds for coatings

Synthesis and evaluation of new hyperbranched alkyds for coa...

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作者： Ikladious, Nawal E. Mansour, Samia H. Asaad, Jeannette N. Emira, Hassan S. Hilt, Michael Dokki Giza12622 Egypt Fraunhofer Institute for Manufacturing Engineering and Automation IPA Coating Systems and Painting Technology Allmandring 37 Stuttgart70569 Germany

Novel hyperbranched alkyd resins (HBAs) were synthesized by reacting the hydroxyl end-groups of the prepared hyperbranched polyesters, based on 1,3,5-tris(2-hydroxyethyl) cyanuric acid (THECA) as a trifunctional core, with different oil fatty acids, namely, linseed, soya and sunflower oil fatty acids. Resins of different compositions of HBAs were prepared by changing either the fatty acid or the generation of the hyperbranched polyester. Their molecular structures were identified using IR and 1H and 13C NMR spectroscopy. The thermal stability, glass transition temperatures and rheological properties were investigated. All of the alkyd resins exhibited initial decomposition temperature at values >300 °C. The decreased Tg values of LG3, SG3 and SFG3 render them suitable for use as coatings that are applied at ambient temperature. All HBAs show Newtonian behaviour and the viscosity was ranging between 1.2 and 5.2 Pa s. Film properties of the prepared alkyd resins using different driers were determined and it has been found that all samples exhibited good adhesion, bending, impact, ductility, and high gloss, but show low hardness. © 2015 Elsevier B.V. All rights reserved.

关键词： Coatings

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Integration of Humidity Sensors into Fibre-reinforced Thermoplastic Composites

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Procedia Technology 2016年 26卷 207-213页

作者： F. Ebert T. Seider H. Illing-Günther K. Nendel J. Martin T. Otto T. Gessner D. Nestler G. Wagner Technische Universität Chemnitz Institute of Materials Handling Conveying and Plastics Engineering Reichenhainer Str. 70 09126 Chemnitz Germany Technische Universität Chemnitz Center for Microtechnologies Reichenhainer Str. 70 09126 Chemnitz Germany Saxon Textile Research Institute (STFI) Annaberger Str. 240 09125 Chemnitz Germany Fraunhofer Institute for Electronic Nano Systems ENAS Technologie-Campus 3 09126 Chemnitz Germany Technische Universität Chemnitz Institute of Materials Science and Engineering Erfenschlager Straße 73 09125 Chemnitz Germany

Due to the functional integration and weight reduction lightweight structures are more and more important, e.g. for automotive, boat or aircraft engineering. Integration of sensors in composites gives information about different mechanical stresses and conditions (failure, impact etc). Furthermore, environmental conditions have a significant influence on operation and durability, e.g. temperature and humidity. Due to the importance of these parameters, this contribution deals with the detection of moisture in composites. The developed foil-based humidity sensors were placed on foil tapes by means of stitching and integrated into fibre-reinforced thermoplastic composites.

关键词： sensor integration humidity sensors stitching lightweight structures

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Analyzing distributions of emails and commits from OSS contributors through mining software repositories: An exploratory study 17

Analyzing distributions of emails and commits from OSS contr...

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17th International Conference on Enterprise Information systems, ICEIS 2015

作者： Farias, Mário Novais, Renato Ortins, Paulo Colaço, Methanias Mendonça, Manoel Federal Institute of Bahia Salvador Brazil Federal Institute of Sergipe São Cristóvão Brazil Fraunhofer Project Center for Software and Systems Engineering Bahia Brazil

ISBN: (纸本)9789897580963

Context: Distributed software development is a modern practice in software industry. This is especially true in Open Source Software (OSS) community. In this context, developers are normally distributed around the world. In addition, most of them work for free and without or with low coordinating. Understanding how developers' practices are on those projects may guide communities to successfully manage their projects. Goal: We mined two repositories of the Apache Httpd project in order to gather information about its developers' behavior. Method: We developed an approach to cross data gathered from mail list and source code repository through mining techniques. The approach uses software visualization to analyze the mined data. We conducted an experimental evaluation of the approach to assess the behavioral patterns from OSS development community. Results: Our results show Apache developers' behavior patterns. In addition, we deepen the analysis of the Preferred Representational System of four top developers presented by Colaço et. al in (Colaço et al., 2010). Conclusion: The use of data mining and software visualization to analyze data from different sources can spot important properties of development processes. Copyright © 2015 SCITEPRESS - Science and Technology Publications.

关键词： Open source software

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OC6 Phase I: Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine

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Journal of Physics: Conference Series 2020年第3期1618卷

作者： A N Robertson S Gueydon E Bachynski L Wang J Jonkman D Alarcón E Amet A Beardsell P Bonnet B Boudet C Brun Z Chen M Féron D Forbush C Galinos J Galvan P Gilbert J Gómez V Harnois F Haudin Z Hu J Le Dreff M Leimeister F Lemmer H Li G Mckinnon I Mendikoa A Moghtadaei S Netzband S Oh A Pegalajar-Jurado M Q Nguyen K Ruehl P Schünemann W Shi H Shin Y Si F Surmont P Trubat J Qwist S Wohlfahrt-Laymann National Renewable Energy Laboratory 15013 Denver W Pkwy Golden CO USA 80401 Maritime Research Institute Netherlands Haagsteeg 2 6708 PM Wageningen Netherlands Norwegian University of Science and Technology 7491 Trondheim Norway Bureau Veritas 60 avenue du Général de Gaulle 92046 Paris - La Défense DNV GL One Linear Park Avon St. Temple Quay Bristol BS2 0PS UK Siemens Digital Industries Software C/Lluis Muntadas 5 Cornellà Spain 08940 Bureau Veritas 8 avenue Jacques Cartier Atlantis - 44807 Saint-Herblain Cdx - France Ocean College Zhejiang University Zhoushan 316021 China DORIS Engineering 58a rue du Dessous des Berges 75013 Paris France Sandia National Laboratories 1515 Eubank Blvd SE Albuquerque NM 87123 DTU Wind Energy Nils Koppels Allé 403 Kgs. Lyngby DK-2800 Denmark Tecnalia Research & Innovation Parque Tecnologico Bizkaia Ed.700 48160 Derio Spain IFPEN 4 avenue de Bois Préau 92852 Rueil-Malmaison Cedex France PRINCIPIA ZAC Athelia I - 215 Voie Ariane 13705 La CIOTAT Cedex France Vulcain Ingénierie 5 rue Beffroy 92200 Neuilly-sur-Seine France School of Engineering Newcastle University Newcastle upon Tyne NE1 7RU UK EDF R&D 7 boulevard Gaspard Monge 91120 Palaiseau France Fraunhofer Inst. for Wind Energy Systems Am Luneort 100 27572 Bremerhaven Germany University of Stuttgart 70569 Stuttgart Germany Orcina Ltd. Daltongate Ulverston Cumbria LA12 7AJ UK Queen's University Belfast Belfast BT9 5AG Northern Ireland United Kingdom Hamburg University of Technology 21071 Hamburg Germany ClassNK 4-7 Kioicho Chiyodaku Tokyo Japan Universität Rostock Albert-Einstein-Str. 2 18059 Rostock Germany Dalian University of Technology No.2 Linggong Road Dalian Liaoning China 116024 University of Ulsan 93 Daehakro Namgu Ulsan 44610 South Korea Universitat Politècnica de Catalunya Jordi Girona 1-3 08034 Barcelona Spain 4Subsea Hagaløkkveien 26 1383 Asker Norway

Phase I of the OC6 project is focused on examining why offshore wind design tools underpredict the response (loads/motion) of the OC5-DeepCwind semisubmersible at its surge and pitch natural frequencies. Previous investigations showed that the underprediction was primarily related to nonlinear hydrodynamic loading, so two new validation campaigns were performed to separately examine the different hydrodynamic load components. In this paper, we validate a variety of tools against this new test data, focusing on the ability to accurately model the low-frequency loads on a semisubmersible floater when held fixed under wave excitation and when forced to oscillate in the surge direction. However, it is observed that models providing better load predictions in these two scenarios do not necessarily produce a more accurate motion response in a moored configuration.

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Investigating user response to a hybrid sketch based interface for creating 3D virtual models in an immersive environment 10

Investigating user response to a hybrid sketch based interfa...

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10th International Conference on Computer Graphics Theory and Applications, GRAPP 2015

作者： Bonnici, Alexandra Israel, Johann Habakuk Muscat, Anne Marie Camilleri, Daniel Camilleri, Kenneth Rothenburg, Uwe Department of Systems and Control Engineering Faculty of Engineering University of Malta Msida Malta Berliner Technische Kunsthochschule University of Applied Sciences Berlin Germany Division Virtual Product Creation Model-based Engineering Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstrasse 8-9 Berlin10587 Germany

ISBN: (纸本)9789897580871

Computer modelling of 2D drawings is becoming increasingly popular in modern design as can be witnessed in the shift of modern computer modelling applications from software requiring specialised training to ones targeted for the general consumer market. Despite this, traditional sketching is still prevalent in design, particularly so in the early design stages. Thus, research trends in computer-aided modelling focus on the the development of sketch based interfaces that are as natural as possible. In this paper, we present a hybrid sketch based interface which allows the user to make draw sketches using offline as well as online sketching modalities, displaying the 3D models in an immersive setup, thus linking the object interaction possible through immersive modelling to the flexibility allowed by paper-based sketching. The interface was evaluated in a user study which shows that such a hybrid system can be considered as having pragmatic and hedonic value. Copyright © 2015 SCITEPRESS - Science and Technology Publications. All rights reserved.

关键词： Hybrid systems

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Big Data Analytics for Earth Sciences:the EarthServer approach

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International Journal of Digital Earth 2016年第1期9卷 3-29页

作者： Peter Baumann Paolo Mazzetti Joachim Ungar Roberto Barbera Damiano Barboni Alan Beccati Lorenzo Bigagli Enrico Boldrini Riccardo Bruno Antonio Calanducci Piero Campalani Oliver Clements Alex Dumitrua,Mike Grant Pasquale Herzig George Kakaletris John Laxton Panagiota Koltsida Kinga Lipskoch Alireza Rezaei Mahdiraji Simone Mantovani Vlad Merticariu Antonio Messina Dimitar Misev Stefano Natali Stefano Nativi Jelmer Oosthoek Marco Pappalardo James Passmore Angelo Pio Rossi Francesco Rundo Marcus Sen Vittorio Sorbera Don Sullivan Mario Torrisi Leonardo Trovato Maria Grazia Veratelli Sebastian Wagner Large-Scale Scientific Information Systems Jacobs UniversityBremenGermany Rasdaman GmbH BremenGermany CNR-IIA National Research Council of ItalyInstitute of Atmospheric Pollution ResearchFlorenceItaly EOX IT Services GmbH ViennaAustria Consorzio COMETA CataniaItaly Division of Catania Italian National Institute for Nuclear PhysicsCataniaItaly Department of Physics and Astronomy University of CataniaCataniaItaly MEEO S.r.l. FerraraItaly Plymouth Marine Laboratory PlymouthUK Fraunhofer IGD DarmstadtGermany Athena Research and Innovation Center in Information Communication&Knowledge Technologies AthensGreece British Geological Survey EdinburghUK Software Engineering Italia S.r.l. CataniaItaly British Geological Survey KeyworthUK NASA Ames Research Center Moffett FieldCAUSA

Big Data Analytics is an emerging field since massive storage and computing capabilities have been made available by advanced *** and Environmental sciences are likely to benefit from Big Data Analytics techniques supporting the processing of the large number of Earth Observation datasets currently acquired and generated through observations and ***,Earth Science data and applications present specificities in terms of relevance of the geospatial information,wide heterogeneity of data models and formats,and complexity of ***,Big Earth Data Analytics requires specifically tailored techniques and *** EarthServer Big Earth Data Analytics engine offers a solution for coverage-type datasets,built around a high performance array database technology,and the adoption and enhancement of standards for service interaction(OGC WCS and WCPS).The EarthServer solution,led by the collection of requirements from scientific communities and international initiatives,provides a holistic approach that ranges from query languages and scalability up to mobile access and *** result is demonstrated and validated through the development of lighthouse applications in the Marine,Geology,Atmospheric,Planetary and Cryospheric science domains.

关键词： big data Big Data Analytics array databases Earth Sciences interoperability standards

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High photon flux and high repetition rate fiber-laser driven HHG

High photon flux and high repetition rate fiber-laser driven...

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Conference on Lasers and Electro-Optics Europe

作者： S. Hadrich T. Eidam A. Hoffmann S. Wunderlich F. Jansen D. Steil S. Mathias J. Limpert Active Fiber Systems GmbH Wildenbruchstr. 15 07745 Jena Germany Georg-August-Universität Göttingen I. Physikalisches Institut Friedrich-Hund-Platz 1 37077 Göttingen Germany Friedrich-Schiller-Universität Jena Abbe Center of Photonics Institute of Applied Physics Albert-Einstein-Straße 15 07745 Jena Helmholtz-Institute Jena Fröbelstieg 3 07743 Jena Fraunhofer Institute for Applied Optics and Precision Engineering Albert-Einstein-Straße 7 07745 Jena

ISBN: (纸本)9781509067374

High harmonic generation (HHG) of ultrashort laser pulses is a key process for the generation of coherent extreme ultraviolet to soft X-ray radiation, which is routinely employed in a wide variety of applications [1]. Amongst the large variety photoelectron spectroscopy and microscopy particularly demands for high repetition rate and high photon flux sources [2,3]. As such, fiber laser driven HHG has emerged as a powerful source to provide the highest photon fluxes in combination with unprecedented repetition rates [4].

关键词： Extreme ultraviolet Fiber lasers High power fiber lasers Photon counting Soft x rays Ultrashort pulses

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A methodology to automatically generate geometry inputs for energy performance simulation from ifc bim models 14

A methodology to automatically generate geometry inputs for ...

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14th Conference of International Building Performance Simulation Association, BS 2015

作者： Giannakis, G.I. Lilis, G.N. Garcia, M.A. Kontes, G.D. Valmaseda, C. Rovas, D.V. Department of Production Engineering and Management Technical University of Crete Chania Greece Fundacion CARTIF Department of Energy Valladolid Spain Group of Energy Systems Institute for Building Physics Fraunhofer Germany

Building Energy Performance (BEP) simulation model require significant effort for set up, limiting the potential utilization of modelling both in the design and operational phases. A methodology for semiautomated BEP simulation model creation could make this process much more expedient and as such lower to threshold for the use of such models. Building Information Models (BIM) are an information-rich repository that could be used to streamline and expedite the collection of such information. Concerning the building geometry, the Industry Foundation Classes (IFC) can provide static building information that include geometric configuration and material properties, but in a form that might not be directly usable for the generation of thermal simulation models due to the absence of 2nd-level boundary information. In this paper, a three-step methodology for (semi-) automated generation of thermal simulation models is presented, including: A query on the building data model requesting geometry-related information;a processing of the acquired data by a 2nd-level boundary identification algorithm, the Common Boundary Intersection Projection (CBIP) algorithm;and a transformation stage that converts the geometry information of IFC, along with the data obtained from the CBIP algorithm, to an EnergyPlus and/or TRNSYS input file, with the latter being the main topic of this paper.

关键词： Geometry

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Few-cycle laser with 216 W average power and 6.3 fs pulses

Few-cycle laser with 216 W average power and 6.3 fs pulses

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Advanced Solid State Lasers, ASSL 2016

作者： Kienel, M. Hädrich, S. Müller, M. Klenke, A. Rothhardt, J. Klas, R. Gottschall, T. Eidam, T. Drozdy, A. Jojart, P. Várallyay, Z. Cormier, E. Osvay, K. Tünnermann, A. Limpert, J. Institute of Applied Physics Abbe Center of Photonics Friedrich-Schiller-Universität Jena Albert-Einstein-Straße 15 Jena07745 Germany Helmholtz Institute Jena Fröbelstieg 3 Jena07743 Germany Active Fiber Systems GmbH Wildenbruchstr. 15 Jena07745 Germany ELI-ALPS ELI-HU Non-Profit Ltd. Dugonics tér 13 SzegedH-6720 Hungary CELIA Université Bordeaux-CNRS-CEA-UMR 5107 351 Cours de la Libération TalenceF-33405 France Fraunhofer Institute for Applied Optics and Precision Engineering Albert-Einstein-Straße 7 Jena07745 Germany

ISBN: (纸本)9781943580200

Nonlinear compression (NC) of fiber lasers has emerged as a powerful scaling concept to achieve high average power few-cycle lasers. Here a 660 W, 0.5 mJ, 260 fs system is used for two-stage NC in gas-filled capillaries. The first stage compresses the pulses to 30 fs while the average power is as high as 408 W, which corresponds to 320 μJ of pulse energy. Further reduction of the pulse duration is achieved in a second stage that allows for the generation of 6.3 fs (sub-2 cycle) pulses at a pulse energy of 170 μJ and an average power of 216 W, which is the highest value achieved to date. © OSA 2016.

关键词： Fiber lasers

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