The atoll sign

Atoll sign or reversed halo sign? Which term should be used?

We read with great interest the article by Walsh and Robertson reporting a case of cryptogenic organising pneumonia. The authors included wonderful images of a CT pattern they called the ‘atoll sign’, which has been described by other authors as the ‘reversed halo sign’. Zompatori et al first used the term ‘atoll sign’ in 1999 to describe the imaging finding of a focal rounded area of ground-gl...

FORMATION OF ATOLL GARNET IN THE ARDARA AUREOLE, NW IRELAND

The formation of atoll garnet in the Ardara aureole, NW Ireland, is discussed using the textural, chemical and Electron Backscatter Diffraction (EBSD) data. Textural evidence suggests the possibility of incipient of garnet replacement from the core. In addition, the presence of staurolite and andalusite in the core of small atoll garnets as well as the occurrence of sillimanite in the core of l...

·Atoll Vegetation and Salinity

The great Pacific groups of atolls are such archipelagoes as the Tuamotus, Carolines, Marshalls, Gilberts, the Phoenix-Ellice group, and those scattered clusters and individual islands collectively termed the Pacific Equatorial or Line Islands. The observations forming the basis of this paper were made on visits to all these groups, except the Phoenix-Ellice and Gilberts, as well as to the Aust...

Atoll Research Bulletin

Performance Evaluation of the ATOLL Interconnect

The ATOLL System Area Network (SAN) is a low latency interconnect that integrates all required components of a communication system for cluster computing into a single chip. The chip integrates not only four communication devices but also a high performance crossbar. The low latency and the scalability of the ATOLL chip implementation makes it an interesting technology in the area of cluster co...