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International Conference on Research Challenges in Information Science, RCIS

作者： Mohamad Ajami Louisa Grabner Giovanni Giambene Van Le Doanh Luong John Pearson Automation Technology Fraunhofer-Institute for Production Systems and Design Technology (IPK) Berlin Germany Department of Information Engineering and Mathematical Sciences University of Siena Siena Italy Faculty of Computer Science University of Namur Namur Belgium

ISBN: (纸本)9781479987115

This paper deals with the implementation of an online platform for Responsible Research and Innovation (RRI), which provides anticipatory and deliberative tools to address societal expectations with regard to resrarch and innovation and mobilises information technology tools for inclusive, responsive and sustainable research. In particular, we have developed a Forum, which is a Web-based application and service for stakeholders (members of the RRI community) to deliberate and discuss about RRI. Different interaction modalities are supported by the Forum, such as: `Caucus Process', Suggestion Board, Partnership Initiative, etc. A special attention is devoted to the Citizen Jury and Tacit Knowledge modules that represent innovative features of our Forum. The outcomes show that our online Forum represents an effective solution to address RRI issues by adopting e-Government and knowledge management approaches. This work was carried out as part of EU FP7 Responsibility project.

关键词： Rail to rail inputs Technological innovation Stakeholders Electronic mail Electronic government Knowledge management Computer science

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Preface ICTE 2015

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Procedia Computer Science 2015年 77卷 1-2页

作者： Ginters, Egils Schumann, Marco Sociotechnical Systems Engineering Institute Vidzeme University of Applied Sciences Cesu Street 4 ValmieraLV-4200 Latvia Fraunhofer Institute for Factory Operation and Automation Sandtorstr. 22 Magdeburg39106 Germany

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Light-induced Degradation in Multicrystalline Silicon: The Role of Copper

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Energy Procedia 2016年 92卷 808-814页

作者： Alessandro Inglese Alessia Focareta Florian Schindler Jonas Schön Jeanette Lindroos Martin C. Schubert Hele Savin Department of Micro- and Nanosciences Aalto University Tietotie 3 02150 Espoo Finland Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstraße 2 79110 Freiburg im Breisgau Germany Department of Engineering and Physics Karlstad University Universitetsg. 2 65188 Karlstad Sweden

In this contribution, we provide an insight into the light-induced degradation of multicrystalline (mc-) silicon caused by copper contamination. Particularly we analyze the degradation kinetics of intentionally contaminated B- and Ga-doped mc-Si through spatially resolved photoluminescence (PL) imaging. Our results show that even small copper concentrations are capable of causing a strong LID effect in both B- and Ga-doped samples. Furthermore, the light intensity, the dopant and the grain quality were found to strongly impact the degradation kinetics, since faster LID was observed with stronger illumination intensity, B-doping and in the grains featuring low initial lifetime. Interestingly after degradation we also observe the formation of bright denuded zones near the edges of the B-doped grains, which might indicate the possible accumulation of copper impurities at the grain boundaries.

关键词： Light-induced degradation multicrystalline silicon copper metal impurities

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Investigation of inhomogeneous shrinkage of partially crystallizing Low Temperature Co-fired Ceramics (LTCC) 11

Investigation of inhomogeneous shrinkage of partially crysta...

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IMAPS/ACerS 11th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2015

作者： Lenz, Christian Kappert, Sandro Ziesche, Steffen Partsch, Uwe Neubert, Holger Fraunhofer Institute for Ceramic Technologies and Systems Dresden Germany Faculty of Mechanical Science and Engineering Dresden University of Technology Dresden Germany

The aim of our study is an improved level of geometrical design fidelity of LTCC microsystems by consideration of location-dependent shrinkage under free sintering conditions. To achieve this, the commercial low temperature co-fired ceramic (LTCC) systems: DuPont GT 951, DuPont 9k7 and Heraeus CT 702 have been investigated experimentally with special regard to the local lateral shrinkage over a 4 inch x 4 inch substrate typically used for the fabrication in multiple panels. Partially crystallizing LTCC materials reveal a significant local dependence of the lateral shrinkage. This dependence is introduced as a shrinkage field. Furthermore, we present an approach for shrinkage field approximation and forecasting. Applied to shrinkage allowance, it allows for minimizing the geometrical deviations after sintering from designed dimensions. Alternatively to a design adapted to the forecasted shrinkage field, local shrinkage deviations can be minimized by sintering for homogeneous shrinkage. Detailed analyses of the DuPont GT 951 system indicate a strong influence of the temperature profile during the free sintering on the shrinkage field. By utilizing this influence, a homogenous shrinkage field can be achieved for optimized heating rate and dwell time at the peak temperature 850°C. © 2015, IMAPS-International Microelectronics and Packaging Society. All rights reserved.

关键词： Sintering

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Simulation support in construction uncertainty management: A production modelling approach

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Periodica Polytechnica Transportation engineering 2016年第2期44卷 115-122页

作者： Pfeiffer, András Kádár, Botond Bohács, Gábor Gáspár, Dániel Computer and Automation Research Institute Fraunhofer Project Center on Production Management and Informatics Hungarian Academy of Sciences Kende u. 13-17 BudapestH-1111 Hungary Department of Materials Handling and Logistics Systems Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics Muegyetem rkp. 3 BudapestH-1111 Hungary

The execution of construction projects such as a highway construction or the elevation of a new bridge is a complex, highly equipment-intensive process and are subject to many different uncertainties. This is very similar to the manufacturing execution level in production systems where predefined productions plans and schedules cannot be completely implemented due to unexpected internal and external changes and disturbances. Following this analogy, the paper proposes the application of a discrete-event simulation based method which was already applied in the decision-support for manufacturing control to develop the decision-support in the execution of a construction project where the effects of the deviation from the short-term schedule can be easily and quickly analyzed.

关键词： Discrete event simulation

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Detection and semi-Automatic correction of geometric inaccuracies in IFC files 14

Detection and semi-Automatic correction of geometric inaccur...

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

作者： Lilis, G.N. Giannakis, G.I. Rovas, D.V. Department of Production Engineering and Management Technical University of Crete Chania Greece Group of Energy Systems Institute for Building Physics Fraunhofer Germany

Accurate representation of geometry-related parameters is a prerequisite for the generation of building thermal simulation models. In case geometric data are extracted from IFC files, three types of geometrical errors are often encountered: clash errors where two building solids intersect, space definition errors where a building space volume is incorrectly defined leaving volume gaps between the space and neighboring building entities (walls, slabs,...) and surface orientation errors, where the normal vector of some boundary surfaces of building solids points to the wrong direction, generating a misconception on which area is inside or outside the solid. These errors are introduced either in the design process or during export from the BIM authoring tool. In this paper, error detection and correction algorithms are introduced to address each individual error type. The algorithms are tested on the geometrical data of the IFC files of two office buildings, where errors of the types mentioned above were detected and automatically corrected.

关键词： Errors

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Domain-specific model checking for cyber-physical systems 12

Domain-specific model checking for cyber-physical systems

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12th Workshop on Model-Driven engineering, Verification and Validation, MoDeVVa 2015

作者： Gerking, Christopher Schäfer, Wilhelm Dziwok, Stefan Heinzemann, Christian Software Engineering Group Heinz Nixdorf Institute University of Paderborn Paderborn33102 Germany Software Engineering Project Group Mechatronic Systems Design Fraunhofer IPT Paderborn33102 Germany

Cyber-physical systems (CPS) require model checking to guarantee the functional correctness of software models, providing counterexamples in case of violations. Domain-specific model checking (DSMC) allows to apply model checking to specific application domains. DSMC hides the complexity of using a model checker by translating from a domain-specific modeling language (DSML) to the model checker's input language, and by translating counterexamples back to the domain-specific level. Implementing DSMC is challenging for CPS due to the large differences between DSMLs and the input language of a model checker. In this paper, we present a successful application of DSMC to MECHATRONICUML, a DSML for the software design of CPS, using the model checker UPPAAL. As a key benefit, our approach is able to translate counterexamples back to the domain-specific level even in case of large differences between DSML and the model checker's input language. We show the correctness of our approach using a case study from the area of car-2-car communication.

关键词： Model checking

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Concept for CEP-stable few-cycle pulses at 100 W average power

Concept for CEP-stable few-cycle pulses at 100 W average pow...

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High Intensity Lasers and High Field Phenomena, HILAS 2016

作者： Eidam, Tino Hoffmann, Armin Hädrich, Steffen Rothhardt, Jan Várallyay, Zoltán Osvay, Károly Tünnermann, Andreas Limpert, Jens Active Fiber Systems GmbH Wildenbruchstr. 15 Jena07745 Germany Friedrich-Schiller-Universität Jena Institute of Applied Physics Abbe Center of Photonics Albert-Einstein-Straße 15 Jena07745 Germany Helmholtz-Institute Jena Fröbelstieg 3 Jena07743 Germany ELI-Attosecond Light Pulse Source ELI-Hu Nkft. Dugonics ter 13 SzegedH6720 Hungary Fraunhofer Institute for Applied Optics and Precision Engineering Albert-Einstein-Straße 7 Jena07745 Germany

ISBN: (纸本)9781943580095

We present the system design and first experimental results of the ELI-ALPS HR1 laser system. It is based on a coherently combined 8-channel fiber laser system and its subsequent nonlinear compression. At the system output CEP-stable few-cycle pulses with 1 mJ energy, >0.1 TW peak power and 100 W of average power will be generated. © OSA 2016.

关键词： Fiber lasers

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A fast dynamic unipolar switching control scheme for single phase inverters in DC microgrids

A fast dynamic unipolar switching control scheme for single ...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Nicolai Hildebrandt Mandip Pokharel Carl Ngai-Man Ho Yuanbin He Department of Power Electronics Fraunhofer Institute for Solar Energy Systems ISE Freiburg Germany Department of Electrical and Computer Engineering University of Manitoba Winnipeg Canada Centre for Smart Energy Conversion and Utilization Research City University of Hong Kong Hong Kong

ISBN: (纸本)9781509007387

This paper presents the digital implementation of a boundary controller with unipolar switching characteristic for single phase voltage source full bridge inverters, which will be used as an interface between a low voltage DC microgrid and AC loads. This paper expands the second order switching surface control method for single phase inverters by unipolar switching with the use of a finite-state machine. Compared to bipolar switching, unipolar switching has the advantage of lower switching losses and filter size. Besides, the switching losses can be equally distributed among semiconductor switches compared to conventional three-level inverter switching scheme. The operating principles of proposed control scheme and mathematical derivation of the switching functions will be given. A 550 VA, 120 V, 60 Hz voltage source inverter (VSI) with a digital signal processor has been implemented to verify the theoretical predictions. Experimental results for steady state operation at different loading conditions show a tightly regulated output voltage, for large-signal disturbances the control is fast and precise.

关键词： Switches Trajectory Inverters Voltage control Microgrids Bridge circuits

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Coherent temporal pulse-stacking approaches for peakpower scaling of ultrafast laser systems

Coherent temporal pulse-stacking approaches for peakpower sc...

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High Intensity Lasers and High Field Phenomena, HILAS 2016

作者： Limpert, Jens Breitkopf, Sven Kiene, Marco Müller, Michael Wunderlich, Stefano Klenke, Arno Eidam, Tino Holzberger, Simon Carstens, Henning Pupeza, Ioachim Tünnermann, Andreas Institute of Applied Physics Abbe Center of Photonics Friedrich-Schiller-Universität Jena Albert-Einstein-Str. 15 Jena07745 Germany Helmholtz-Institute Jena Fröbelstieg 3 Jena07743 Germany Active Fiber Systems GmbH Wildenbruchstr. 15 Jena07745 Germany Fraunhofer Institute for Applied Optics and Precision Engineering Albert-Einstein-Str. 7 Jena07745 Germany Max-Planck-Institute of Quantum Optics Hans-Kopfermann-Str. 1 Garching85748 Germany Ludwig-Maximilians-Universität München Department of Physics Am Coulombwall 1 Garching85748 Germany

ISBN: (纸本)9781943580095

In recent years, improving the performance of femtosecond lasers has become more and more challenging. A promising way to get around intrinsic physical limitations in laser designs it is the technique of spatially and/or temporally separated amplification and subsequent coherent addition of ultrashort pulses. It turns out that fiber amplifiers are perfect candidates for this concept due to their outstanding average-power capability and their simple single-pass setups. Herein we provide an overview of the most important experimental implementations of temporally separated amplification and recent results. © OSA 2016.

关键词： Fiber amplifiers

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