In [17, 18] we presented a pairing based DAA protocol in the asymmetric setting, along with a “security proof”. Jiangtao Li has pointed out to us an attack against this published protocol, thus our prior work should not be considered sound. In this paper we give a repaired version, along with a highly detailed security proof. A full paper will be made available shortly. However in the meantime ...

Dry plant material contains 2-4% nitrogen, making it an essential nutrient for all plants. The nitrogen cycle regulates the pathways which transform nitrogen from a relatively inert dinitrogen gas to forms of organic nitrogen such as proteins and nucleic acids. Denitrification and nitrogen fixation are the two most important processes that remove and add nitrogen to the soil, respectively. The ...

The Neoproterozoic (1000-542 million years ago, Mya) was characterized by profound global environmental and evolutionary changes, not least of which included a major rise in atmospheric oxygen concentrations [1, 2], extreme climatic fluctuations and global-scale glaciation [3], and the emergence of metazoan life in the oceans [4, 5]. We present here phylogenomic (135 proteins and two ribosomal ...

Sera collected in 1950 from the native population in the vicinity of Cairo, Egypt, have been tested for complement-fixing antibodies to Type 2 (Lansing) poliomyelitis virus. Complement-fixing antibodies are confined to the age of 1 to 9 years if a serum dilution of 1:4 is used in the test, or to the age of 1 to 4 years with a serum dilution of 1:16. A comparison has been made of the findings ob...

Use of alternate substrates (acetylene, azide, cyanide) for estimating N(2) fixation confirmed that recombined fractions from different bacteria are functional but restricted in complementarity.

Pertaining to Agent-based Computational Economics (ACE), this work presents two models for the rise and downfall of speculative bubbles through an exchange price fixing based on a double auction mechanism. The first model is based in a finite time horizon context where total expected dividends decrease along with time. The second model follows the greater fool hypothesis: an agent behaviour dep...

SymRK is one of the key genes involved in initial steps of legume symbiotic association with fungi (mycorrhization) and nitrogen-fixing bacteria (nodulation). A large portion of the sequence encoding the extracellular domain of SYMRK was obtained for 38 lupine accessions and 2 outgroups in order to characterize this region, to evaluate its phylogenetic utility, and to examine whether its molecu...

Newcastle disease virus infection of Ehrlich ascites tumor cells resulted, after a period of time, in the appearance of intracellular viral antigen which could be demonstrated by the fluorescent antibody technique. This antigen appeared in the cytoplasm of infected cells only after inoculation of cell-virus mixtures into the peritoneal cavities of mice. The latent period prior to the appearance...