Trading-off reliability and performance in FPGA-based reconfigurable heterogeneous systems

2018 ◽  
Author(s):  
Alessandro Vallero ◽  
Alberto Carelli ◽  
Stefano Di Carlo
Keyword(s):  
Heterogeneous Systems ◽  
And Performance

Multiple Attributes Decision Making Algorithms for Vertical Handover in Heterogeneous Wireless Networks

2011 ◽  
pp. 52-71 ◽  
Author(s):  
Enrique Stevens-Navarro ◽  
José D. Martínez-Morales ◽  
Ulises Pineda-Rico
Keyword(s):  
Decision Making ◽  
Heterogeneous Wireless Networks ◽  
Heterogeneous Systems ◽  
Vertical Handover ◽  
Multiple Attribute Decision Making ◽  
Access Networks ◽  
Future Research ◽  
Wimax Networks ◽  
Heterogeneous Wireless Systems ◽  
And Performance

The envisioned heterogeneous wireless systems are expected to integrate multiple access networks over a common IP platform. In such systems, since mobile users expect to achieve the Always Best Connected (ABC) experience, heterogeneous systems have to support the vertical handover of users among different access networks. On the other hand, the field of Multiple Attribute Decision Making (MADM) has proved to be a suitable tool to study the vertical handover process. This chapter presents a survey of MADM algorithms that have been proposed for vertical handover. First, the authors describe the procedures of methods such as SAW, MEW, TOPSIS, ELECTRE, and VIKOR. Then, the chapter compares them by mean of simulations and performance analysis for an heterogeneous system integrated by WLAN, UMTS, and WiMAX networks, when users conduct different applications. The chapter concludes with a summary of open issues and future research directions in the area of vertical handover.

scholarly journals An Approach to Adaptive Dependability Assessment in Dynamic and Evolving Connected Systems

2013 ◽  
Vol 4 (1) ◽  
pp. 1-25
Author(s):  
Felicita Di Giandomenico ◽  
Antonia Bertolino ◽  
Antonello Calabrò ◽  
Nicola Nostro
Keyword(s):  
Performance Prediction ◽  
Heterogeneous Systems ◽  
Software Products ◽  
Software Applications ◽  
Performance Requirements ◽  
Operating Environments ◽  
Adaptive Assessment ◽  
And Performance ◽  
Model Based Analysis

Complexity, heterogeneity, interdependency and, especially, evolution of system/services specifications, related operating environments and user needs, are more and more highly relevant characteristics of modern and future software applications. Taking advantage of the experience gained in the context of the European project Connect, which addresses the challenging and ambitious topic of eternally functioning distributed and heterogeneous systems, this paper presents a framework to analyse and assess dependability and performance properties in dynamic and evolving contexts. The goal is to develop an adaptive approach by coupling stochastic model-based analysis, performed at design time to support the definition and implementation of software products complying with their stated dependability and performance requirements, with run-time monitoring to re-calibrate and enhance the dependability and performance prediction along evolution. The proposed framework for adaptive assessment is described and illustrated through a case study. To simplify the description while making more concrete the approach under study, the authors adopted the setting and terminology of the Connect project.

Cyber Physical Internet

2015 ◽  
pp. 76-97 ◽  
Keyword(s):  
Heterogeneous Systems ◽  
Physical Layer ◽  
Physical Interaction ◽  
Performance Guarantee ◽  
Physical Internet ◽  
Physical Information ◽  
System Interconnection ◽  
Phy Layer ◽  
And Performance ◽  
Different Levels

This chapter explores the concept of the Cyber Physical Internet (CPI) and discusses the design necessities of it. In addition, it provides the restrictions of the present networking concepts to satisfy these necessities. The structural design of protocol stack for CPI has an extra layer Cyber-Physical Layer (CY-PHY Layer) to offer a conceptual description of the properties and type of cyber physical information. To enable standard communication between heterogeneous systems, Cyber Physical System-Interconnection Protocol is used. This protocol is mainly designed for special CPSs, which require overall instruction and performance guarantee for cyber physical interaction. The main objective of this protocol is to offer CPSs heterogeneity at three different levels: function interoperability, policy regulation, and performance guarantee.

Transmission Scanning Electron Microscopy and Energy Analysis with the Siemens ELMISKOP 101

1972 ◽  
Vol 30 ◽  
pp. 450-451
Author(s):  
H. M. Thieringer
Keyword(s):  
Objective Lens ◽  
Transmission Microscopy ◽  
Image Recording ◽  
Mode Of Operation ◽  
Scanning Transmission ◽  
Electron Microscopes ◽  
And Performance ◽  
Convergent Beam ◽  
Ray Path ◽  
Beam Diffraction

It has repeatedly been show that with conventional electron microscopes very fine electron probes can be produced, therefore allowing various micro-techniques such as micro recording, X-ray microanalysis and convergent beam diffraction. In this paper the function and performance of an SIEMENS ELMISKOP 101 used as a scanning transmission microscope (STEM) is described. This mode of operation has some advantages over the conventional transmission microscopy (CTEM) especially for the observation of thick specimen, in spite of somewhat longer image recording times.Fig.1 shows schematically the ray path and the additional electronics of an ELMISKOP 101 working as a STEM. With a point-cathode, and using condensor I and the objective lens as a demagnifying system, an electron probe with a half-width ob about 25 Å and a typical current of 5.10-11 amp at 100 kV can be obtained in the back focal plane of the objective lens.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

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