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Université de Neuchâtel

Demonstration of a high-performance pulsed optically pumped Rb clock based on a compact magnetron-type microwave cavity

Kang, Songbai ; Gharavipour, Mohammadreza ; Affolderbach, Christoph ; Gruet, Florian ; Mileti, Gaetano

In: Journal of Applied Physics, 2015/117//104510 -1/5

We demonstrate a high-performance pulsed optically pumped (POP) Rb vapor-cell clock based on a magnetron-type microwave cavity of only 44 cm3 external volume. Using optical detection, an unprecedented 35% contrast of the Ramsey signal has been obtained. Both the signal-to-noise ratio (of 30 000) and the estimated shot-noise limit of 1.7×10-14 τ-1/2 are at the...

Université de Neuchâtel

Aging studies on micro-fabricated alkali buffer-gas cells for miniature atomic clocks

Abdullah, Salman ; Affolderbach, Christoph ; Gruet, Florian ; Mileti, Gaetano

In: Applied Physics Letters, 2015/106//163505/1-5

We report an aging study on micro-fabricated alkali vapor cells using neon as a buffer gas. An experimental atomic clock setup is used to measure the cell’s intrinsic frequency, by recording the clock frequency shift at different light intensities and extrapolating to zero intensity. We find a drift of the cell’s intrinsic frequency of (-5.2 ± 0.6) × 10-11/day and quantify...

Université de Neuchâtel

Social strategies and tool use in wild corvids

Di Lascio, Felice Elias ; Bshary, Redouan (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2014.

Crows and ravens have attracted increasing attention because of the advanced cognitive capacities these birds seem to possess, which have earned them the nickname of “feathered apes”. Indeed, the work carried out in the last two decades has shown that corvids possess abilities that can rival those of monkeys and apes. Birds within this family tend to form long-term monogamous bonds, where...

IOC Olympic Studies Centre

Rio 2016 guide to timber products : may 2014

Organising Committee for the Olympic and Paralympic Games in Rio in 2016

Rio : Organising Committee for the Olympic and Paralympic Games in Rio in 2016, 2014

With regards to sustainable purchasing, Rio 2016 has made the commitment to only source certified timber products for use in Games venues, following internationally recognised norms and standards, based on the principles and criteria of responsible forest management.

IOC Olympic Studies Centre

Aquece Rio International sailing regatta : 2-9 August 2014

Organising Committee for the Olympic and Paralympic Games in Rio in 2016

Rio : Rio 2016, 2014

The event will be governed by the racing rules of sailing (RRS) 2013/2016 of ISAF, the notice of race, the sailing instructions, the coach boat regulations, the athletes media guide and any other official document published.

Bibliothèque d'art et d'archéologie, Genève

Art romain

Chamay, Jacques ; Maier, Jean-Louis

Mainz am Rhein : P. von Zabern, cop. 1989

(Sculptures en pierre du Musée de Genève ; t. 2)

ISBN: 3805310412