Systematic check-marks In the sagittal otollths from 6 species of scarids sampled fl-om the Great Bar~ier Reef, Australia, were used to develop size-at-age plots. The species were Chlorurus gibbus, C. sordidus, Scarus frenatus, S. niger. S. psittacus and S. nvulatus. Comparative information for a seventh specles, S. schelgeli, for which otolith increment data \*ere ava~lable. was also included....

Neither arbitrary horses, nor intentional lions, nor generic unicorns are animals, and would-be assistents do not have to be assistents.2 In fact, one may well wonder just what sort of objects the paraphrases in (0') are supposed to be about. Given their dubious ontological status, an analysis of (0) that can do without them ought to be preferrable to one along the lines of (0') – ceteris parib...

Byzantine-fault-tolerant service protocols like Q/U and FaB Paxos that optimistically order requests can provide increased efficiency and fault scalability. However, these protocols require n ≥ 5b + 1 servers (where b is the maximum number of faults tolerated), owing to their use of opaque Byzantine quorum systems; this is 2b more servers than required by some non-optimistic protocols. In this ...

Code obfuscation and software watermarking are well known techniques designed to prevent the illegal reuse of software. Code obfuscation prevents malicious reverse engineering, while software watermarking protects code from piracy. An interesting class of algorithms for code obfuscation and software watermarking relies on the insertion of opaque predicates. It turns out that attackers based on ...

The human fungal pathogen Candida albicans undergoes white-opaque phenotypic switching, which enhances its adaptation to host niches. Switching is controlled by a transcriptional regulatory network of interlocking feedback loops acting on the transcription of WOR1, the master regulator of white-opaque switching, but regulation of the network on the translational level is not yet explored. Here,...

Objects seen through the microscope by transmitted light are translucent in differing degrees. Staining gives a measure of differential opacity and contrast to biological material but, even here, the appearance, like that of an x-ray picture, is a record of relative opacities. Varying the focal plane, of course, allows a range of optical sections, and from this the surface appearance can be inf...

Discovered over a decade ago, white-opaque switching in the human fungal pathogen Candida albicans is an alternation between two quasistable, heritable transcriptional states. Here, we show that white-opaque switching and sexual mating are both controlled by mating type locus homeodomain proteins and that opaque cells mate approximately 10(6) times more efficiently than do white cells. These re...

Negative-index metamaterials (NIMs) exhibit highly unusual optical properties and promise a great variety of unprecedented applications. However, strong optical absorption inherent to such materials imposes severe limitation on such applications. The possibility to overcome this obstacle was proposed based on the coherent energy transfer from the control field to the signal through three-wavemi...

3 results of this exercise tend to indicate that core mesh networks will remain opaque for some time. This column then explores the potential opportunity for cost reduction and scalability by introducing transparent switches in opaque networks. However, several challenges, both in technology and in network architecture, will have to be addressed before one can achieve the potential benefits of ...