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21st European Microelectronics and Packaging Conference and Exhibition, EMPC 2017

作者： Mazloum-Nejadari, Ali Lederer, Martin Khatibi, Golta Nicolics, Johann Infineon AG Neubiberg Germany Institute of Sensor and Actuator Systems TU Wien Austria Chrstn. Doppler Lab. for Lifetime and Reliability of Interfaces in Complex Multi-Mat. Electronics Institute CTA TU Wien Austria

ISBN: (纸本)9780956808646

Due to the ongoing miniaturization of electronic parts, there is the concern that the diameters of micro-wires approach the dimensions of the crystalline microstructure. Owing to fabrication technology and harsh environmental conditions during service, the wires are often exposed to elevated temperature. This leads to grain growth until the cross section of a wire includes only a few grains. In the worst case, wires develop a bamboo-microstructure, where the cross section of a wire is characterized by a single grain. In consequence, depending on the crystallographic orientation, some grains can deform by easy glide. Thereby, the yield stress is drastically reduced compared to polycrystalline materials. In conclusion, the reliability of electronic devices deteriorates. Such effects were studied in detail on the basis of Crystal Plasticity Finite Element simulations. Within this approach, every single grain is modelled according to its own orientation, and crystallographic slip develops on the glide systems with the highest Schmid factors during loading. During glide deformation the dislocation density of activated slip systems increases. This leads to strain hardening, since the dislocations of one glide system appear as forest dislocations for the other systems. In this way, the material strength of a grain depends on its deformation history. A grain embedded in a matrix of neighboring grain shows much higher resistance to plastic deformation than free standing grains. The material parameters of these simulations were chosen from literature to fit experiments for copper single crystals. The results of this study are well illustrated in several deformation plots relating the stress distributions to dislocation densities. © 2017 IMAPS Europe.

关键词： Finite element method

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Design and characterization of a micro-opto-mechanical displacement sensor

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17th National Conference on sensors and Microsystems

作者： Schena, E. Cidda, M. Accoto, D. Francomano, M. Pennazza, G. Guglielmelli, E. Silvestri, S. Measurements and Instrumentation Lab Università Campus Bio-Medico di Roma Via Alvaro del Portillo 21-00128 Rome Italy Biomedical Robotics and Biomicrosystems Lab Università Campus Bio-Medico di Roma Via Alvaro del Portillo 21-00128 Rome Italy Laboratory for Electronics for Sensor Systems Università Campus Bio-Medico di Roma Via Alvaro del Portillo 21-00128 Rome Italy

ISBN: (纸本)9783319006833

Fiber optic-based mechanical sensors, thanks to their reduced sensitivity to external electromagnetic fields, are promising in the development of biomechatronic systems able to work in demanding environments, such as MRI chambers. In this chapter we report on the working principle, design, and experimental characterization of a micro-opto-mechanical displacement sensor, which exploits the light modulation induced by the relative displacement of two overlapped micro-fabricated gratings. The gratings are obtained by photo patterning a Pt layer (45 nm thick), sputtered on a Pyrex substrate, into an array of stripes, 150 μm wide and with a 525 μm period. The calibration was carried out up to 525 μm displacement. The sensor showed high and constant sensitivity in the ranges from 30 to 140 μm and from 360 to 490 μm. The experimental data, together with the known advantages of fiber optic-based sensors, encourage further studies for the development of sensors exploiting the proposed measurement principle. © 2014 Springer International Publishing Switzerland.

关键词： Fiber optics

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A CdTe-CMOS Hybrid for Energy, Position and Time Identification

A CdTe-CMOS Hybrid for Energy, Position and Time Identificat...

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IEEE Nuclear Science Symposium

作者： D. Hatzistratis G. Theodoratos I. Kazas E. Zervakis D. Loukas S. Vlassis C. P. Lambropoulos Oy Ajat Ltd Technological Educational Institute of Sterea Ellada Institute of Nuclear Physics National Center for Scientific Research European Sensor Systems Electronics Lab. Physics Dept. University of Patras

ISBN: (纸本)9781479960989

A 2-D pixel CMOS ASIC has been developed for the needs of a Compton imaging instrument. The ASIC consists of a 50×25 pixels array with 400μm pitch and an embedded controller. The pixel includes charge amplifier and shaper, peak detector, hit flag comparator, time to voltage converter, configuration registers, in-pixel A/D conversion and DRAM for digital data storage. For the in-pixel A/D conversion a Wilkinson scheme is used. Data are readout only from the pixels which have received hit. The circuit works in snapshot mode with adjustable frame time. The ASIC has been bump bonded to CdTe pixel detectors and the hybrid has been irradiated with radioactive sources and characterized.

关键词： pixel ASIC application specific integrated circuits charge amplifier Radiation sources DRAM1 gene HYBRID digital storage Embeddedi Controller

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Modelling Variability in Activity Diagrams for Mobile Business Applications

Modelling Variability in Activity Diagrams for Mobile Busine...

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IEEE Annual International Computer Software and Applications Conference (COMPSAC)

作者： Viktor Kolokolov Stefan T. Ruehl Paul Baumann Shaozhen Zhang Stephan A.W. Verclas Institute of Electrical and Electronics Engineers Germany Clausthal University of Technology Clausthal-Zellerfeld Germany TU Darmstadt Wireless Sensor Networks Lab Darmstadt Germany Darmstadt Germany T-Systems International GmbH Darmstadt Germany

ISBN: (纸本)9781479935765

Advances in development and deployment of mobile business applications (MBAs) based on the hybrid Web approach (hybrid MBAs) create new possibilities for enterprises to mobilize their business processes (BPs). Despite the fact that variability has a natural appearance in complex environments among different enterprises, current development tools for hybrid MBAs are lacking systematic support for variable features. We analyse in this paper the formation of hybrid MBAs' variable workflows on the BP-level by conducting an exploratory study within the context of a real-world, widespread BP instance. We also discuss quality assurance of domain activity diagrams (DADs), which document variability in BPs' workflows. Novel verification techniques for a structural analysis of DADs are highlighted.

关键词： Bridges Mobile communication Image edge detection Business Software Petri nets Electronic mail

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Modular Design of Fully Integrated Counting Line Detectors

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Procedia Engineering 2012年 47卷 530-533页

作者： T. Lohse P. Krüger H. Heuer M. Oppermann H. Torlee K.-J. Wolter N. Meyendorf Sensors & Sensor Systems Fraunhofer Institute for Non-Destructive Testing (Dresden branch) Maria-Reiche-Str. 2 01109 Dresden Germany Electronics Packaging Lab Technical University of Dresden Helmholtzstr. 10 01069 Dresden Germany Sensor-Actor-Systems Fraunhofer Institute for Photonic Microsystems Maria-Reiche-Str. 2 01109 Dresden Germany

An assembly concept of the radiation resistant, direct converting counting X-ray line detector is presented. Special efforts on radiation protection of the sensitive analogue electronics and the realization of the arr... 详细信息

关键词： X-ray detector direct converting GaAs

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Development of radiation resistant, direct converting X-ray line detectors in terms of their assembly technology

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Procedia Engineering 2011年 25卷 459-462页

作者： T. Lohse P. Krüger H. Heuer M. Oppermann H. Torlee T. Zerna K.J. Wolter N. Meyendorf Sensors & Sensor Systems Fraunhofer Institute for Non-Destructive Testing (Dresden branch) Maria-Reiche-Str. 2 01109 Dresden Germany Electronics Packaging Lab Technical University of Dresden Helmholtzstr. 10 01069 Dresden Germany Sensor-Actor-Systems Fraunhofer Institute for Photonic Microsystems Maria-Reiche-Str. 2 01109 Dresden Germany

In this paper an assembly concept of the radiation resistant, direct converting X-ray line detector is presented. In addition to efforts on radiation protection of sensitive electronics, realization of arranging several sensor modules is discussed. Furthermore, the electrical behavior of the designed and manufactured GaAs sensors is explained.

关键词： X-ray detector direct converting GaAs

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Enabling multiple BSN applications using the SPINE framework

Enabling multiple BSN applications using the SPINE framework

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2010 International Conference on Body sensor Networks, BSN 2010

作者： Gravina, Raffaele Alessandro, Andreoli Salmeri, Alessia Buondonno, Luigi Raveendranafhan, Nikhil Loseu, Vitali Giannantonio, Roberta Seto, Edmund Fortino, Giancarlo Telecom Italia Turin Italy Wireless Sensor Networks Lab Telecom Italia Berkeley CA 94720 United States Department of Electronics Informatics and Systems University of Calabria Rende Italy Department of Electronics Telecommunication and Biomedic Engineering Universita' Politecnica Delle Marche Ancona Italy School of Public Health University of California Berkeley CA 94720 United States Embedded Systems and Signal Processing Lab University of Texas at Dallas Dallas TX 75080 United States

ISBN: (纸本)9780769540658

Employment of BSN-based technologies in real world scenarios requires a flexible infrastructure at both hardware and software level. In this paper, we emphasize how the use of SPINE (Signal Processing In-Node Environment), a software framework for BSN, supports the development of heterogeneous health-care applications based on reusable subsystems. One of the main goal of SPINE is to provide a flexible architecture that can support variety of practical applications without the need for costly redeployment of the code running on sensor nodes. We also present a SPINE sensor node emulator that supports the first phase of the algorithm design, when the actual hardware devices may not be available. This approach can guide the choice of the required hardware (e.g. the sensors) to meet the application requirements based on the results obtained in the emulated environment. Such tool can simplify the research collaboration during the specification stage of a project, due to availability of a common (virtual) architecture. © 2010 IEEE.

关键词： sensor nodes

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Opportunistic strategies for lightweight signal processing for body sensor networks 10

Opportunistic strategies for lightweight signal processing f...

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3rd International Conference on PErvasive Technologies Related to Assistive Environments, PETRA 2010

作者： Seto, Edmund Martin, Eladio Yang, Allen Yan, Posu Gravina, Raffaele Lin, Irving Wang, Curtis Roy, Michael Shia, Victor Bajcsy, Ruzena School of Public Health University of California Berkeley CA 94720 United States Electrical Engineering and Computer Sciences University of California Berkeley CA 94720 United States Wireless Sensor Networks Lab Telecom Italia Berkeley CA 94720 United States Department of Electronics Informatics and Systems University of Calabria Rende Italy

ISBN: (纸本)9781450300711

We present a mobile platform for body sensor networking based on a smartphone for lightweight signal processing of sensor mote data. The platform allows for local processing of data at both the sensor mote and smartphone levels, reducing the overhead of data transmission to remote services. We discuss how the smartphone platform not only provides the ability for wearable signal processing, but it allows for opportunistic sensing strategies, in which many of the onboard sensors and capabilities of modern smartphones may be collected and fused with body sensor data to provide environmental and social context. We propose that this can help refine data reduction at the local level. We describe three examples related to health and wellness, to which our system has been *** © 2010 ACM.

关键词： Smartphones

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Enabling Multiple BSN Applications Using the SPINE Framework

Enabling Multiple BSN Applications Using the SPINE Framework

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International Workshop on Wearable and Implantable Body sensor Networks (BSN)

作者： Raffaele Gravina Andreoli Alessandro Alessia Salmeri Luigi Buondonno Nikhil Raveendranathan Vitali Loseu Roberta Giannantonio Edmund Seto Giancarlo Fortino Telecom Italia Wireless Sensor Networks Lab Berkeley CA Department of Electronics Informatics and Systems University of Calabria Rende Italy Department of Electronics Telecommunication and Biomedic Engineering Universita’ Politecnica delle Marche Ancona Italy Telecom Italia Turin Italy Embedded Systems and Signal Processing Lab University of Texas at Dallas Dallas TX USA School of Public Health University of California Berkeley CA USA

关键词： Body sensor networks Wireless sensor networks Hardware Application software Signal processing Signal processing algorithms Telecommunications Biomedical signal processing Embedded software Software reusability

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Implementation of virtual sensors in body sensor networks with the SPINE framework

Implementation of virtual sensors in body sensor networks wi...

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International Symposium on Industrial Embedded systems

作者： Nikhil Raveendranathan Vitali Loseu Eric Guenterberg Roberta Giannantonio Raffaele Gravina Marco Sgroi Roozbeh Jafari Embedded Systems and Signal Processing Lab University of Texas at Dallas Dallas TX USA Telecom Italia Torino Italy Wireless Sensor Networks Lab Telecom Italia Berkeley CA Department of Electronics Informatics and Systems University of Calabria Rende Italy

Signal processing for body sensor networks usually comprises multiple levels of data abstraction, from raw sensor data to data calculated from processing steps such as feature extraction and classification. This paper presents a multi-layer task model based on the concept of virtual sensors (VS) to improve architecture modularity and design reusability. In our pilot application of gait parameter extraction, VS are abstractions of components of BSN classification systems that include sensor sampling and processing tasks and provide data upon external requests analogous to the function of physical sensors. The paper presents an extension of the SPINE framework including a new buffer management scheme that facilitates the VS implementation.

关键词： Body sensor networks Wireless sensor networks Acoustic sensors sensor systems Signal processing Temperature sensors Operating systems sensor systems and applications sensor phenomena and characterization Base stations

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