TAILIEUCHUNG - The STARTWAVE atmospheric water database

In this paper we propose the design of Byzantium, a Byzantine-fault-tolerant database replication middle- ware. Byzantium improves on existing BFT replication for databases both because it has no centralized compo- nents (of whose correctness the integrity of the system depends) and by allowing increased concurrency, which is essential to achieve good performance. The main insight behind our approach is to aim for weaker semantics than traditional BFT replication approaches. While previous BFT database systems tried to achieve strong semantics (such as linearizabil- ity or 1-copy serializability [2]), Byzantiumonly ensures snapshot isolation (SI), which is a weaker form of se- mantics that is supported by most commercial databases (., Oracle, Microsoft SQL Server). Our design. | Atmos. Chem. Phys. 6 2039-2056 2006 6 2039 2006 Author s 2006. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics The STARTWAVE atmospheric water database J. Morland1 B. Deuber1 D. G. Feist1 L. Martin1 S. Nyeki1 2 N. Kampfer1 C. Matzler1 P. Jeannet2 and L. Vuilleumier2 institute of Applied Physics University of Bern Sidlerstrasse 5 Bern 3012 Switzerland 2MeteoSwiss Atmospheric Data Department Les Invuardes Payerne 1530 Switzerland now at BKW FMB Energie AG Switzerland Received 13 July 2005 - Published in Atmos. Chem. Phys. Discuss. 28 October 2005 Revised 9 February 2006 - Accepted 4 April 2006 - Published 20 June 2006 Abstract. The STARTWAVE STudies in Atmospheric Radiative Transfer and Water Vapour Effects project aims to investigate the role which water vapour plays in the climate system and in particular its interaction with radiation. Within this framework an ongoing water vapour database project was set up which comprises integrated water vapour IWV measurements made over the last ten years by ground-based microwave radiometers Global Positioning System GPS receivers and sun photometers located throughout Switzerland at altitudes between 330 and 3584 m. At Bern N E tropospheric and stratospheric water vapour profiles are obtained on a regular basis and integrated liquid water which is important for cloud characterisation is also measured. Additional stratospheric water vapour profiles are obtained by an airborne microwave radiometer which observes large parts of the northern hemisphere during yearly flight campaigns. The database allows us to validate the various water vapour measurement techniques. Comparisons between IWV measured by the Payerne radiosonde with that measured at Bern by two microwave radiometers GPS and sun photometer showed instrument biases within mm. The bias in GPS relative to sun photometer over the 2001 to 2004 period was mm at Payerne N E 490

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