Concept

Crash test dummy

Related publications (16)

Time reversal applied to fault location in power networks: Pilot test results and analyses

Mario Paolone, Zhaoyang Wang, Reza Razzaghi

This paper presents the results of a pilot test performed on a real medium voltage distribution network in Switzerland with the aim of assessing the performance of a fault location system relying on the Electromagnetic Time Reversal (EMTR) method. To the b ...

2020

Packaging technologies for high temperature control electronics

Yusuf Leblebici, Thomas Maeder, Peter Ryser

Current low temperature electronics (175°C) for prolonged periods of time require packaging technologies that have to tackle many new problems. At high temperatures traditionally used materials such as organic circuit boards, adhesives and standard solders degrade rapidly or undergo changes in structure and pro

IMAPS2013

Vers un modèle proactif pour identifier des risques de trafic

André-Gilles Dumont

Our goal is to develop motorway traffic risks identification models using disaggregate traffic data, meteorological data and crash database for a study site at a two-lane-per-direction section on motorway A1 in Urtenen-Schönbühl, Switzerland. We define traffic situations - TSs representing traffic status for a certain time duration and traffic regimes - TRs obtained by clustering TSs. The models are traffic regimes – based and are developed using classification and regression trees to identify rear-end coll

2010

Methodology for traffic risks identification

André-Gilles Dumont

Of all modes of transport, transport by road is the most dangerous and the most costly in terms of human lives, according to Road Safety Action Program (2003-2010). In Europe, the 2010 road safety target of halving the number of road fatalities by 2010 seems difficult to be obtained although road safety has been improved recently. Focusing on crash prevention on motorways, this paper proposes a framework for identifying risky traffic conditions using logistic regression models for specific traffic condition

2009

Sensitivity of risk indicators under motorway traffic regimes clustered by self-organizing map

André-Gilles Dumont

In this paper, we present a method for determining motorway traffic regimes where the sensitivity of motorway crash risk indicators could be better understood. Motorway crashes are usually severe. If the crash risk could be monitored, it would be possible to prevent crashes or at least diminish their severity. Using risk indicators could be a way to grasp the crash risk. Under different traffic regimes, there should exist typical crash risk. Hence, risk indicators would better grasp the risk if they were co

2008

A Primary-Backup Protocol for In-Memory Database Replication

The paper presents a primary-backup protocol to manage replicated in-memory database systems (IMDBs). The protocol exploits two features of IMDBs: coarse-grain concurrency control and deferred disk writes. Primary crashes are quickly detected by backups and a new primary is elected whenever the current one is suspected to have failed. False failure suspicions are tolerated and never lead to incorrect behavior. The protocol uses a consensus-like algorithm tailor-made for our replication environment. Under no

2006

A Primary-Backup Protocol for In-Memory Database Replication

Rodrigo Malta Schmidt, Fernando Pedone

2006

A Software/Hardware Platform For Rapid Prototyping of Video and Multimedia Designs

Marco Mattavelli

Traditional design and test of complex multimedia systems involves a large number of test vectors and is a difficult and time-consuming task. The simulation times are prohibitively long on current desktop computers. Driving actual design scenarios and timing burst behavior which produce real-time effects is difficult to do with current simulation environments. This paper describes a rapid emulation framework for accessing multiple hardware IP blocks on an FPGA. This solution involves an abstraction of the F

IEEE2005

Robust Emulations of Shared Memory in a Crash-Recovery Model

Rachid Guerraoui

A shared memory abstraction can be robustly emulated over an asynchronous message passing system where any process can fail by crashing and possibly recover (crash-recovery model), by having (a) the processes exchange messages to synchronize their read and write operations and (b) log key information on their local stable storage. This paper extends the existing atomicity consistency criterion defined for multi-writer/multi-reader shared memory in a crash-stop model, by providing two new criteria for the cr

2004

A new look at atomic broadcast in the asynchronous crash-recovery model

André Schiper

Atomic broadcast in particular, and group communication in general, have mainly been specified and implemented in a system model where processes do not recover after a crash. The model is called crash-stop. The drawback of this model is its inability to express algorithms that tolerate the crash of a majority of processes. This has led to consider group communication in the so-called crash-recovery model, in which processes have access to stable storage, to log their state periodically. This allows them to

2004

An Efficient Universal Construction for Message-Passing Systems

Rachid Guerraoui, Partha Dutta

A universal construction is an algorithm that transforms any object with a sequential specification into a wait-free and linearizable implementation of that object. This paper presents a novel universal construction algorithm for a message-passing system with process crash failures. Our algorithm relies on two fine-grained underlying abstractions: a weak form of leader election, and a one-shot form of register. Our algorithm is \emp{indulgent}, \emp{efficient} and \emp{generic}. Being indulgent intuitively

2002

On the practical use of weld improvement methods

Alain Nussbaumer

Many laboratory studies have shown the beneficial effects of weld improvement methods on the fatigue strength of welded details. However, no structural codes systematically include weld improvement methods in detail classification. The purpose of this paper is to discuss the possibilities of using these methods in practice on either new or existing structures. This paper provides the reader with practical rules for designing and computing the fatigue strength of improved welded joints. A computation method

2001

Modeling and simulation of an impact test using wavelets, analytical solutions and finite elements

Pierre Vandergheynst

An instrumented falling weight impact test is thoroughly investigated in two cases, that of a rebound and that of a rupture in the sample. First, the force signal is analyzed with four methods: the continuous wavelet transform (with different wavelets: derivatives of a Gaussian and Morlet's), the Gabor transform, the Wigner Ville transform and the classical Fourier analysis. It is shown how a proper use of the time frequency methods allows to precisely detect the discontinuities in the signal, the moment of

2001

MHD stability limits in the TCV tokamak

Holger Reimerdes

Magnetohydrodynamic (MHD) instabilities can limit the performance and degrade the confinement of tokamak plasmas. The Tokamak à Configuration Variable (TCV), unique for its capability to produce a variety of poloidal plasma shapes, has been used to analyse various instabilities and compare their behaviour with theoretical predictions. These instabilities are perturbations of the magnetic field which usually extend to the plasma edge where they can be detected with magnetic pick-up coils as magnetic fluctuat

EPFL2001

Muteness Failure Detectors: Specification and Implementation

Rachid Guerraoui, André Schiper

This paper extends the failure detector approach from crash-stop failures to muteness failures. Muteness failures are malicious failures in which a process stops sending algorithm messages, but might continue to send other messages, e.g., ``I am alive'' messages. The paper presents both the specification of a muteness failure detector, denoted ny M and an implementation of M in a partial synchrony model. We show that, modulo a simple modification, a consensus algorithm that has been designed in a crash-

Sprnger1999

Muteness Failure Detectors, Specification and Implementation

Rachid Guerraoui, André Schiper

This paper extends the failures detector approach from crash-stop failures to muteness failures. Muteness failures are malicious failures in which a process stops sending algorithm messages, but might continue to send other messages, e.g. 'I-am-alive' messages. The paper presents both the specification of a muteness failure detector, denoted by MA, and an implementation of MA in a partial synchrony model (there are bounds on message latency and clock skew, but these bounds are unknown and hold only after so

1999

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Related publications (16)