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Thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-systems EuroSimE

作者： R. Mirzazadeh S. Mariani A. Ghisi M. De Fazio Dipartimento di Ingegneria Civile e Ambientale Politecnico di Milano Milano Italy Advanced System Technology STMicroelectronics Agrate Brianza Italy

Fluid damping is studied for resonant torsional micromirrors, electrostatically actuated by comb fingers. A three-dimensional computational fluid dynamics (CFD) model of the air flow around the moving parts of the mirror is developed, coping with dynamic remeshing procedures to properly account for the large displacement setting required by the motion of the compliant structure. The time evolution of the damping torque contributions, due to shear at comb fingers and to drag over the surfaces of the micromirror plate, are computed. The relevant numerical estimation of the overall quality factor of the system is shown to compare well with available experimental results.

关键词： Abstracts Torque Energy storage Oscillators

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High Density Wireless EEG Prototype: Design and Evaluation against Reference Equipment

High Density Wireless EEG Prototype: Design and Evaluation a...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society

作者： Stefano Rossi Shrishail Patki Marco Passoni Hannes Perko Gerhard. Gritsch Pauly Ossenblok Refet Firat Yazicioglu Advanced System Technology department STMicroelectronics Holst Centre imec-nl Department Safety & Security AIT Austrian Institute of Technology GmbH Epilepsy Centre Kempenhaeghe imec

ISBN: (纸本)9781424479276

A high density wireless electroencephalographic (EEG) platform has been designed. It is able to record up to 64 EEG channels with electrode to tissue impedance (ETI) monitoring. The analog front-end is based on two kinds of low power ASICs implementing the active electrodes and the amplifier. A power efficient compression algorithm enables the use of continuous wireless transmission of data through Bluetooth for real-time monitoring with an overall power consumption of about 350 mW. EEG acquisitions on five subjects (one healthy subject and four patients suffering from epilepsy) have been recorded in parallel with a reference system commonly used in clinical practice and data of the wireless prototype and reference system have been processed with an automatic tool for seizure detection and localization. The false alarm rates (0.1-0.5 events per hour) are comparable between the two system and wireless prototype also detected the seizure correctly and allowed its localization.

关键词： Electroencephalography Wireless communication Electrodes Prototypes Monitoring Bluetooth Real-time systems

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A Low Power Bioimpedance Module for Wearable systems

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Procedia Engineering 2014年 87卷 1274-1277页

作者： Stefano Rossi Marco Pessione Luigi Della Torre Advanced System Technology (AST) STMicroelectronics Via Olivetti 220864 Agrate Brianza Italy The Biorobotics Institute Scuola Superiore Sant’Anna Viale R. Piaggio 34 56026 Pontedera Italy

A low power novel architecture for the measurement of module and phase of bioimpedance (electrical impedance of body or of a part of it) is suggested. It enables to reach good performances with reduced consumption. The circuit has been prototyped and characterized. First tests for breathing rate monitoring demonstrated good functionality of the circuit.

关键词： bioimpedance wearable systems remote monitoring impedance plethysmography VI converter demodulation

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Programming real-time image processing for manycores in a high-level language

Programming real-time image processing for manycores in a hi...

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10th International Symposium on advanced Parallel Processing Technologies, APPT 2013

作者： Gebrewahid, Essayas Zain-Ul-Abdin Svensson, Bertil Gaspes, Veronica Jego, Bruno Lavigueur, Bruno Robart, Mathieu Center for Research on Embedded Systems Halmstad University Halmstad Sweden STMicroelectronics - Advanced System Technology Grenoble France STMicroelectronics - Advanced System Technology Bristol United Kingdom

ISBN: (纸本)9783642452925

Manycore architectures are gaining attention as a means to meet the performance and power demands of high-performance embedded systems. However, their widespread adoption is sometimes constrained by the need for mastering proprietary programming languages that are low-level and hinder portability. We propose the use of the concurrent programming language occam-pi as a high-level language for programming an emerging class of manycore architectures. We show how to map occam-pi programs to the manycore architecture Platform 2012 (P2012). We describe the techniques used to translate the salient features of the language to the native programming model of the P2012. We present the results from a case study on a representative algorithm in the domain of real-time image processing: a complex algorithm for corner detection called Features from Accelerated Segment Test (FAST). Our results show that the occam-pi program is much shorter, is easier to adapt and has a competitive performance when compared to versions programmed in the native programming model of P2012 and in OpenCL. © 2013 Springer-Verlag.

关键词： High level languages

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Quantitative review of local descriptors for visual search

Quantitative review of local descriptors for visual search

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： Simone Bianco Raimondo Schettini Davide Mazzini Danilo Pietro Pau DISCo - University of Milano-Bicocca Italy Advanced System Technology STMicroelectronics Italy

Local Visual detectors and descriptors have been studied for many years, but their applications, for example on visual search, for large volume, low cost, embedded systems have been limited or negligible to date. One reason is the lack of an industry standard applicable at worldwide level. MPEG Compact Descriptors for Visual Search (CDVS) working group is filling the gap by defining a highly performing extraction stage and the bitstream syntax at its output. As a contribution to such process, this work reviews existing methods for interest point detection and description. They are compared on several databases, exploiting the pairwise matching test environment devised by the MPEG CDVS standardization group.

关键词： Bars Detectors Visualization Image color analysis Computer vision Transform coding

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Fast and accurate power annotated simulation: Application to a many-core architecture

Fast and accurate power annotated simulation: Application to...

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International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS)

作者： Thomas Ducroux Germain Haugou Vincent Risson Pascal Vivet STMicroelectronics-Advanced System Technology Grenoble France CEA-Leti Minatec Campus Grenoble France

Power consumption is crucial in embedded systems, mainly because of the limited battery capacity and the problem of heat dissipation. The energy efficiency of system-on-Chips (SoCs) is optimized at both hardware and software level using simulation platforms. The challenge of these platforms lies in the tradeoff between accuracy and simulation speed for early architecture exploration and HW/SW validation. In the context of many-core systems in which heavy software stacks are executed, fast simulation platforms are required. In this paper, we present our power modeling approach of a complex many-core system to estimate the power consumption of software applications executed on it. We propose in particular a light and accurate power model for VLIW processors, as this kind of processor is commonly used in such systems. The power estimator we set up is part of a practical power characterization framework fully automated that includes low level simulations which are then used to back-annotate fast simulation models. Our case study is the STHORM accelerator, a clustered many-core architecture comprising dual-instruction issue processors, a complex memory hierarchy and DMA engines. Experimental results show that we can perform fast power estimations with an estimation error lower than 4% for the VLIW cores, which are the main source of power consumption, and less than 10% for the overall SoC platform, and for a simulation time overhead lower than 1%.

关键词： Program processors Power demand Computer architecture Hardware Integrated circuit modeling Analytical models

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Extended MPEG-4 3DGC for real-time rendering on embedded platforms

Extended MPEG-4 3DGC for real-time rendering on embedded pla...

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： Mathieu Robart Mauro Plumari Danilo Pau Advanced System Technology (AST) Bristol UK STMicroelectronics R&D Agrate Brianza Italy

The majority of embedded application processors includes programmable GPUs capable of rendering complex 3D assets in real-time. Most of these assets are encoded in proprietary formats, limiting the possibility of exchange and dissemination. The MPEG-4 3DGC standard aims at solving this problem, in offering a compressed and comprehensive way to store and deliver animated, textured 3D assets across different platforms. In this paper, we presents the development of a Player developed on embedded, mobile and desktop platforms, capable of processing and rendering such models in real-time using OpenGL ES 2.0. In addition, extensions to the standards have been developed and proposed as amendment, pushing the 3DGC standard further to support modern, GPU-accelerated platforms.

关键词： Transform coding Three-dimensional displays Animation Bones Standards Graphics processing units Rendering (computer graphics)

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Embedded key frame extraction in UGC scenarios

Embedded key frame extraction in UGC scenarios

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IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： A. Sentinelli L. Celetto G. Marfia M. Roccetti Advanced System Technology STMicroelectronics Agrate Brianza Italy Computer Science Department University of Bologna Bologna Italy

ISBN: (纸本)9781479916030

Video summarization is an old problem that offers a wide variety of scenarios and approaches. In this work we investigated the suitability of Key Frame Extraction (KFE) solutions in embedded architectures for mobile platforms. In particular, in our scenario the list of key frames is requested right after a shooting session ends. The most interesting outcome has been the evaluation of performances in User Generated Content (UGC) scenarios through an extensive survey based on Opinion Scores, interviews and other minor metrics. We tested five different solutions and results suggest that pursuing sophisticated algorithms doesn't necessarily enrich the end user experience. We hope that this work will contribute to stimulate the debate on the KFE also in realistic scenarios and to pay attention to the user feedbacks to drive the investigation.

关键词： Streaming media Cameras Histograms Computer architecture Redundancy Buffer storage Visualization

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A novel architecture enabling the visual implementation of web of Things applications

A novel architecture enabling the visual implementation of w...

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International Conference on Software, Telecommunications and Computer Networks (SoftCOM)

作者： Luca Mainetti Vincenzo Mighali Luigi Patrono Piercosimo Rametta Silvio Lucio Oliva Piercosimo Rametta University of Salento Leece ITALY Universita del Salento Lecce Puglia IT STMicroelectronics Advanced System Technology Lecce Italy

The concept of Internet of Things is becoming one of the key aspects for the future Internet, where embedded devices will be responsible for collecting data from the surrounding environment and making them available to useful mash-up applications. In order to guarantee a high feasibility of this scenario, it would be appropriate to have a flexible and intuitive architecture for the implementation of such applications without knowing specific details about the constrained hardware and operating system. Therefore, in this work, a software system for the graphical development of mash-up applications, dedicated to Wireless Sensor Networks, was designed and implemented. It is based on a Constrained Application Protocol application server, called Actinium, and on a graphical editor, called ClickScript. Especially the latter one has been substantially modified in order to communicate with Actinium and to interact with the constrained resources made available by the WSN. The effectiveness of the proposed solution has been tested through a real use case that has demonstrated the validity of the whole system.

关键词： Servers Protocols Visualization Wireless sensor networks Programming Computer architecture Internet

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MRI parallel processing for embedded visualization

MRI parallel processing for embedded visualization

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： Manuel Beniani Mariagiovanna Sami Danilo Pietro Pau DEI-Dipartimento di Elettronica e Informazione Politecnico di Milano Milano Italy Advanced System Technology STMicroelectronics Agrate Brianza Italy

This work focuses on the development of the BrainTool, an embedded application that provides full automated volume segmentation and visualization of a reconstructed 3D mesh of human brains. A brain scan is performed to acquire a set of voxels using a 3D Magnetic Resonance sampler. The application is executed on embedded (mobile) systems. The tool operates through three principal modules: an automatic segmentation to remove the non-brain structures, a parallel implementation state of art Marching Cubes mesh synthesizer followed by an OpenGL ES rendering step to achieve model interactive visualization. The development of the application is done using two different low cost boards integrating low power state of art CPU and GPU into embedded system on chip; in order to test the solution, samples acquired from MRI equipment commonly available at hospitals are used. The experiments allow to conclude that the Marching Cube algorithm parallelize fairly enough and can be distributed on the available resources reaching scalable performances when executed on laptop and embedded systems. Rendering of complex graphics assets up to 2.7M triangles per model is performed.

关键词： Three-dimensional displays Magnetic resonance imaging Visualization Rendering (computer graphics) Pipelines Image segmentation Electroencephalography

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