Publications associées à National Physical Laboratory

Triple Crossed Flexure Pivot Based on a Zero Parasitic Center Shift Kinematic Design

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

Thanks to their absence of play, absence of contact friction and possible monolithic fabrication, flexure pivots offer advantages over traditional bearings in small-scale, high accuracy applications and environments where lubrication and wear debris are pr ...

2022

Predicting hot-electron free energies from ground-state data

Michele Ceriotti, Federico Grasselli, Chiheb Ben Mahmoud

Machine-learning potentials are usually trained on the ground-state, Born-Oppenheimer energy surface, which depends exclusively on the atomic positions and not on the simulation temperature. This disregards the effect of thermally excited electrons, that i ...

AMER PHYSICAL SOC2022

Conceptual design of a rotational mechanical time base with varying inertia

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

Flexure pivot oscillators have the potential to advantageously replace the traditional balance wheel-spiral spring oscillator used in mechanical watches due to their significantly lower friction. However, they have inherent nonlinear elastic properties tha ...

2019

Optimistic Causal Consistency for Geo-Replicated Key-Value Stores

Willy Zwaenepoel, Diego Didona, Kristina Spirovska

In this paper we present a new approach to implementing causal consistency in geo-replicated data stores, which we call Optimistic Causal Consistency (OCC). The optimism in our approach lies in that updates from a remote data center are immediately made vi ...

Ieee Computer Soc2017

GentleRain: Cheap and Scalable Causal Consistency with Physical Clocks

Willy Zwaenepoel, Calin Iorgulescu, Jiaqing Du, Amitabha Roy

GentleRain is a new causally consistent geo-replicated data store that provides throughput comparable to eventual consistency and superior to current implementations of causal consistency. GentleRain uses a periodic aggregation protocol to deter- mine whet ...

ACM2014

Orbe: Scalable Causal Consistency Using Dependency Matrices and Physical Clocks

Willy Zwaenepoel, Sameh Mohamed Elnikety, Jiaqing Du, Amitabha Roy

We propose two protocols that provide scalable causal consistency for both partitioned and replicated data stores using dependency matrices (DM) and physical clocks. The DM protocol supports basic read and update operations and uses two-dimensional depende ...

2013

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National Physical Laboratory

Triple Crossed Flexure Pivot Based on a Zero Parasitic Center Shift Kinematic Design

Predicting hot-electron free energies from ground-state data

Conceptual design of a rotational mechanical time base with varying inertia

Optimistic Causal Consistency for Geo-Replicated Key-Value Stores

Consistency Models in Distributed Systems with Physical Clocks

GentleRain: Cheap and Scalable Causal Consistency with Physical Clocks

Orbe: Scalable Causal Consistency Using Dependency Matrices and Physical Clocks

Quelques aspects de la diffusion quantique

Graph Chatbot

Chattez avec Graph Search

Optimistic Causal Consistency for Geo-Replicated Key-Value Stores

Triple Crossed Flexure Pivot Based on a Zero Parasitic Center Shift Kinematic Design

Predicting hot-electron free energies from ground-state data

Quelques aspects de la diffusion quantique

Conceptual design of a rotational mechanical time base with varying inertia

Orbe: Scalable Causal Consistency Using Dependency Matrices and Physical Clocks

GentleRain: Cheap and Scalable Causal Consistency with Physical Clocks

Consistency Models in Distributed Systems with Physical Clocks