Blandine Debraize, Louis Goubin,
... shrinking Generator (SSG) was proposed by Meier and Staffelbach at Eurocrypt’94. Two similar guess-and-determine ... of solving this polynomial system. Since Meier and Staffelbach original paper, avoiding low Hamming weight feedback polynomials ...
Tópico(s): Polynomial and algebraic computation
2008 - Springer Science+Business Media | Lecture notes in computer science
L. K. Emmons, Didier Hauglustaine, Jean‐François Müller, Mary Anne Carroll, Guy Brasseur, Dominik Brunner, J. Staehelin, V. Thouret, A. Marenco,
... J. G. Walega, G. L. Kok, T. A. Staffelbach, J. P. Greenberg, F. E. Grahek, P. G. ... experiment, J. Geophys. Res., 101, 24165– 24186, 1996. Staffelbach, T. A., G. L. Kok, B. G. Heikes, ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2000 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... generator, a stream cipher due to Meier and Staffelbach (see Advances in Cryptology-EUROCRYPT'94, Berlin, Germany, ... confirms the surprising experimental observations of Meier and Staffelbach.
Tópico(s): Cellular Automata and Applications
1999 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Theory
Andreas Sigg, Katrin Führer, Martin Anklin, T. Staffelbach, Daniel. Zurmuehle,
... ice coresAndreas. Sigg, Katrin. Fuhrer, Martin. Anklin, Thomas. Staffelbach, and Daniel. ZurmuehleCite this: Environ. Sci. Technol. 1994, ...
Tópico(s): Arctic and Antarctic ice dynamics
1994 - American Chemical Society | Environmental Science & Technology
H. Oeschger, A. Neftel, T. Staffelbach, B. Stauffer,
... in the Greenland ice sheet close to bedrock (Staffelbach and others 1988, this volume). With the existing ...
Tópico(s): Atmospheric chemistry and aerosols
1988 - Cambridge University Press | Annals of Glaciology
... am MainSearch for more papers by this authorF. Staffelbach, F. Staffelbach Frankfurt am MainSearch for more papers by this ... am MainSearch for more papers by this authorF. Staffelbach, F. Staffelbach Frankfurt am MainSearch for more papers by this ...
Tópico(s): Advanced Thermodynamics and Statistical Mechanics
1937 - Wiley | Annalen der Physik
Carlos Pérez Arroyo, Jérôme Dombard, Florent Duchaine, Laurent Gicquel, B. W. Martin, Nicolas Odier, Gabriel Staffelbach,
Optimising the design of aviation propulsion systems using computational fluid dynamics is essential to increase their efficiency and reduce pollutant as well as noise emissions. Nowadays, and within this optimisation and design phase, it is possible to perform meaningful unsteady computations of the various components of a gas-turbine engine. However, these simulations are often carried out independently of each other and only share averaged quantities at the interfaces minimising the impact and ...
Tópico(s): Turbomachinery Performance and Optimization
2021 - Veruscript | Journal of the Global Power and Propulsion Society
Adrien Suau, Gabriel Staffelbach, Henri Calandra,
In the last few years, several quantum algorithms that try to address the problem of partial differential equation solving have been devised: on the one hand, “direct” quantum algorithms that aim at encoding the solution of the PDE by executing one large quantum circuit; on the other hand, variational algorithms that approximate the solution of the PDE by executing several small quantum circuits and making profit of classical optimisers. In this work, we propose an experimental study of the costs ( ...
Tópico(s): Quantum-Dot Cellular Automata
2021 - Association for Computing Machinery | ACM Transactions on Quantum Computing
Siyuan Niu, Adrien Suau, Gabriel Staffelbach, Aida Todri‐Sanial,
Due to several physical limitations in the realisation of quantum hardware, today's quantum computers are qualified as Noisy Intermediate-Scale Quantum (NISQ) hardware. NISQ hardware is characterized by a small number of qubits (50 to a few hundred) and noisy operations. Moreover, current realisations of superconducting quantum chips do not have the ideal all-to-all connectivity between qubits but rather at most a nearest-neighbour connectivity. All these hardware restrictions add supplementary low- ...
Tópico(s): Parallel Computing and Optimization Techniques
2020 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Quantum Engineering
Arjen L. Gökalp, Johanna J.M. Takkenberg,
... J. 2009; 36: 104-110Google Scholar, 14Stalder M. Staffelbach S. Immer F.F. et al.Aortic root ...
Tópico(s): Cardiac Valve Diseases and Treatments
2019 - Elsevier BV | Seminars in Thoracic and Cardiovascular Surgery
Oliver Schulz, Emile Piccoli, Anne Felden, Gabriel Staffelbach, Nicolas Noiray,
This numerical study builds upon the experimental work of Wagner et al., e.g. [Combust. Flame 176 (2017)], and focuses on the flame stabilization mechanism of a reactive jet in crossflow (RJICF). A 300 K premixed ethylene-air jet (ϕj=1.2) is injected into a hot vitiated crossflow at 1500 K. A compressible three-dimensional (3-D) large eddy simulation (LES) was performed with an analytically reduced chemistry mechanism. Comparisons between LES and experiments are in good agreement in terms of jet trajectories ...
Tópico(s): Computational Fluid Dynamics and Aerodynamics
2019 - Elsevier BV | Combustion and Flame
Quentin Malé, Gabriel Staffelbach, Olivier Vermorel, Antony Misdariis, Frédéric Ravet, Thierry Poinsot,
Using homogeneous lean mixtures is an efficient way to reduce fuel consumption and pollutant emissions in internal combustion engines. However, lean combustion requires breakthrough technologies to induce reliable ignition and fast combustion. One of these technologies uses pre-chamber to create multiple hot turbulent jets and provide ignition sites for the lean mixture. In this paper, the behaviour of a pre-chamber ignition system used to ignite the main chamber of a real engine is studied using ...
Tópico(s): Combustion and Detonation Processes
2019 - Springer Science+Business Media | Flow Turbulence and Combustion
Anna Sender, Lea Rutishauser, Bruno Staffelbach,
Abstract Despite the growing body of literature on the effects of job embeddedness on turnover, there are few studies on how job embeddedness operates in different countries. This study, based on the Conservation of Resources theory, addresses this research gap by investigating both the additive and the buffering effects of on‐the‐job and off‐the‐job embeddedness using employee data from China ( n = 373) and Switzerland ( n = 268). Results showed that on‐the‐job embeddedness reduced the likelihood of turnover ...
Tópico(s): Work-Family Balance Challenges
2018 - Wiley | Human Resource Management Journal
Guillaume Daviller, Maxence Brebion, Pradip Xavier, Gabriel Staffelbach, Jens‐Dominik Müller, Thierry Poinsot,
Large-Eddy Simulation (LES) has become a potent tool to investigate instabilities in swirl flows even for complex, industrial geometries. However, the accurate prediction of pressure losses on these complex flows remains difficult. The paper identifies localised near-wall resolution issues as an important factor to improve accuracy and proposes a solution with an adaptive mesh h-refinement strategy relying on the tetrahedral fully automatic MMG3D library of Dapogny et al. (J. Comput. Phys. 262, 358- ...
Tópico(s): Computational Fluid Dynamics and Aerodynamics
2017 - Springer Science+Business Media | Flow Turbulence and Combustion
Swapan Maiti, Shamit Ghosh, Dipanwita Roy Chowdhury,
... Rule 30 CA is vulnerable against Meier and Staffelbach (MS) attack. This paper analyzes maximum period nonlinear ...
Tópico(s): Cryptographic Implementations and Security
2017 - Springer Science+Business Media | Lecture notes in computer science
Manuela Christina Morf, Anja Feierabend, Bruno Staffelbach,
Purpose The purpose of this paper is to examine the relationship between task variety and counterproductive work behavior (CWB) and the relationship between change in task variety and change in CWB. CWB is proposed as being a behavior that serves as an outlet by which employees can express displeasure and acts as a substitute for a lack of interest when task variety is low. Design/methodology/approach This study analyzed survey data that were collected at two points in time (T1 and T2) from 515 employees ...
Tópico(s): Occupational Health and Safety Research
2017 - Emerald Publishing Limited | Journal of Managerial Psychology
Anna Sender, Alexandra Arnold, Bruno Staffelbach,
As downsizing and restructuring have become global phenomena, the impact of job insecurity on employee attitudes has received significant attention. However, research examining the role of cultural dimensions has been largely unexplored. Drawing on the conservation of resources theory, we investigated whether the relationships between both quantitative job insecurity (i.e. the perceived threat of job loss) and qualitative job insecurity (i.e. the perceived threat of losing valued job features) and ...
Tópico(s): Organizational Downsizing and Restructuring
2016 - Routledge | The International Journal of Human Resource Management
Sandrine Berger, Richard J. Kahnoski, Florent Duchaine, Gabriel Staffelbach, Laurent Gicquel,
The design of aeronautical engines is subject to many constraints that cover performance gain as well as increasingly sensitive environmental issues. These often contradicting objectives are currently being answered through an increase in the local and global temperature in the hot stages of the engine. As a result, hot spots could appear causing a premature aging of the combustion chamber. Today, the characterization of wall temperatures is performed experimentally by complex thermocolor tests ...
Tópico(s): Advanced Combustion Engine Technologies
2016 - Elsevier BV | Applied Thermal Engineering
Annafederica Urbano, Laurent Selle, Gabriel Staffelbach, Bénédicte Cuenot, Thomas Schmitt, Sébastien Ducruix, Sébastien Candel,
This article explores the possibility of analyzing combustion instabilities in liquid rocket engines by making use of Large Eddy Simulations (LES). Calculations are carried out for a complete small-scale rocket engine, including the injection manifold thrust chamber and nozzle outlet. The engine comprises 42 coaxial injectors feeding the combustion chamber with gaseous hydrogen and liquid oxygen and it operates at supercritical pressures with a maximum thermal power of 80 MW. The objective of the ...
Tópico(s): Rocket and propulsion systems research
2016 - Elsevier BV | Combustion and Flame
Annafederica Urbano, Quentin Douasbin, Laurent Selle, Gabriel Staffelbach, Bénédicte Cuenot, Thomas Schmitt, Sébastien Ducruix, S. Candel,
The Large-Eddy Simulation of a reduced-scale rocket engine operated by DLR has been conducted. This configuration features 42 coaxial injectors fed with liquid oxygen and gaseous hydrogen. For a given set of injection conditions the combustor exhibits strong transverse thermo-acoustic oscillations that are retrieved by the numerical simulation. The spatial structure of the two main modes observed in the LES is investigated through 3D Fourier analysis during the limit cycle. They are respectively ...
Tópico(s): Rocket and propulsion systems research
2016 - Elsevier BV | Proceedings of the Combustion Institute
Richard S. Miller, Justin W. Foster,
... InRedditEmail About References [1] Gicquel L. Y. M., Staffelbach G. and Poinsot T., "Large Eddy Simulations of ...
Tópico(s): Fire dynamics and safety research
2016 - American Institute of Aeronautics and Astronautics | AIAA Journal
Andrey Bogdanov, Ilya Kizhvatov, Kamran Manzoor, Elmar Tischhauser, Marc F. Witteman,
... probabilistic key enumeration algorithm (PKEA) by Meier and Staffelbach and show its practical superiority in this case. ...
Tópico(s): Physical Unclonable Functions (PUFs) and Hardware Security
2016 - Springer Science+Business Media | Lecture notes in computer science
Florent Duchaine, Stéphan Jauré, Damien Poitou, Eric Quémerais, Gabriel Staffelbach, T. Morel, Laurent Gicquel,
In many communities such as climate science or industrial design, to solve complex coupled problems with high fidelity external coupling of legacy solvers puts a lot of pressure on the tool used for the coupling. The precision of such predictions not only largely depends on simulation resolutions and the use of huge meshes but also on high performance computing to reduce restitution times. In this context, the current work aims at studying the scalability of code coupling on high performance computing ...
Tópico(s): Advanced Numerical Methods in Computational Mathematics
2015 - IOP Publishing | Computational Science & Discovery
Abdulla Ghani, Thierry Poinsot, Laurent Gicquel, Gabriel Staffelbach,
Combustion dynamics of a V-flame in an afterburner-type configuration are investigated using high-order compressible large eddy simulations (LES) and compared to experimental results. Both self-excited longitudinal (100 Hz) and transverse (1400 Hz) modes observed in the experiments are captured by LES and instability mechanisms are discussed. LES results for all modes are compared to a Helmholtz solver output, showing that the transverse mode appearing in the LES is the 1Lx-2Ty-0Tz eigenmode of the ...
Tópico(s): Fire dynamics and safety research
2015 - Elsevier BV | Combustion and Flame
David Barré, Lucas Esclapez, Matthieu Cordier, Éléonore Riber, Bénédicte Cuenot, Gabriel Staffelbach, Bruno Renou, Alexis Vandel, Laurent Gicquel, Gilles Cabot,
Tópico(s): Fire dynamics and safety research
2014 - Elsevier BV | Combustion and Flame
Manuela Christina Morf, Alexandra Arnold, Bruno Staffelbach,
Purpose – The purpose of this paper is to investigate how temporary agency workers’ job attitudes are influenced by the fulfilment of the psychological contract; a set of employees’ expectations, formed with the temporary work agency and its client: the host organisation. Design/methodology/approach – The paper estimated moderated regressions with data collected through an online survey of 352 temporary agency workers employed by a large temporary work agency in Switzerland. Findings – Results suggest ...
Tópico(s): Work-Family Balance Challenges
2014 - Emerald Publishing Limited | Employee Relations
Lukman Hakim, Anthony Ruiz, Thomas Schmitt, Matthieu Boileau, Gabriel Staffelbach, Sébastien Ducruix, Bénédicte Cuenot, Sébastien Candel,
This article describes a numerical investigation that explores the dynamics of multiple cryogenic jet flames interacting with high frequency transverse acoustic modes. This research is motivated by the numerous issues associated with high-frequency instabilities in liquid rocket engines. Large eddy simulations are carried out in a complex flow configuration which is turbulent, reactive, transcritical and in the absence or presence of a large-amplitude acoustic motion. The geometry is that of a model ...
Tópico(s): Wind and Air Flow Studies
2014 - Elsevier BV | Proceedings of the Combustion Institute
Céline Blondeau, Kaisa Nyberg,
... in cryptography was first discovered by Meier and Staffelbach from the point of view of correlation attacks ...
Tópico(s): Chaos-based Image/Signal Encryption
2014 - Elsevier BV | Finite Fields and Their Applications
Christoph Tschuor, Dimitri Aristotle Raptis, Manuela Christina Morf, Bruno Staffelbach, Tanja Manser, Pierre‐Alain Clavien,
Strong evidence exists associating job satisfaction and risk of burnout with productivity, efficiency, and creativity in many organizations. However no data are available assessing chairs of surgery. This study assessed job satisfaction and risk for burnout of surgical chairs from Europe and North America and identified contributing factors.A survey among 650 chairs in surgery from 23 European and 2 North American countries was conducted in 2012. Satisfaction at work was analyzed using the validated ...
Tópico(s): Surgical Simulation and Training
2014 - Elsevier BV | Surgery
Michaël Bauerheim, Gabriel Staffelbach, Nicholas A. Worth, James R. Dawson, Laurent Gicquel, Thierry Poinsot,
This paper describes a numerical study of azimuthal unstable modes in the annular combustor of Cambridge. LES is used to compute a Harmonic Flame Response Model (HFRM) and a Helmholtz solver to predict the overall stability of the combustor. HFRM quantifies the interaction between acoustics and the turbulent swirled flames. They must be known with precision because instabilities are very sensitive to subtle changes. The effects of azimuthal confinement (corresponding to the annular combustor equipped ...
Tópico(s): Wind and Air Flow Studies
2014 - Elsevier BV | Proceedings of the Combustion Institute