Amendments to WMO BATHY Code : Implementation of New XBT Fall-rate Equation

Implementation of Viterbi Decoder with Variable Code Rate

It is well known that data transmissions over wireless channels are affected by attenuation, distortion, interference and noise, which affect the receiver’s ability to receive correct information. Convolution encoding with VITERBI decoding is a good forward error correction technique suitable for channels affected by noise degradation. It has been widely deployed in many wireless communication ...

Fao-wmo Roving Seminar

New implementation of a non-associated flow rule in rate-independent plasticity

One of the new research fields in plasticity is related to choosing a proper non-associated flow rule (NAFR), instead of the associated one (AFR), to predict the experimental results more accurately. The idea of the current research is derived from combining von Mises and Tresca criteria in the places of yield and plastic potential surfaces in rate-independent plasticity.  This idea is implemen...

Implementation of new OPAL tables in Eggleton’s stellar evolution code

Based on the work of OPAL (Iglesias & Rogers 1996) and Alexander & Ferguson (1994), we construct a series of opacity tables for various metallicities Z = 0, 0.000 01, 0.000 03, 0.000 1, 0.000 3, 0.001, 0.004, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08 and 0.1. These tables can be easily used in Eggleton’s stellar evolution code in place of the old tables without changing the code. The OPAL tables...

Wmo Greenhouse Gas Bulletin

In 2015, Earth experienced the start of a strong El Niño event. El Niño events are natural fluctuations of the climate system where unusually warm water accumulates in the equatorial Pacific Ocean. El Niño events are associated with abnormal weather patterns such as strong storms in some places and droughts or flooding in others. A typical El Niño event lasts 9 months to 2 years. This phenomeno...