Parallel BLAST versions of split databases are implemented using MPI and Pthreads, and have been ported to various platforms including Windows, Linux, Solaris, Mac OS X, and AIX. Popular approaches to parallelize BLAST include query distribution, hash table segmentation, computation parallelization, and database segmentation (partition). Databases are split into equal sized pieces and stored locally on each node. Each query is run on all nodes in parallel and the resultant BLAST output files from all nodes merged to yield the final output. Specific implementations include MPIblast, ScalaBLAST, DCBLAST and so on.
The BLAST program can either be downloaded and run as a command-line utility "blastall" or accessed for free over the web. The BLAST web server, hosted by the NCBI, allows anyone with a web browser to perform similarity searches against constantly updated databases of proteins and DNA that include most of the newly sequenced organisms.
In 2009, NCBI has released a new set of BLAST executables, the C++ based BLAST+, and has released C versions until 2.2.26. Starting with version 2.2.27 (April 2013), only BLAST+ executables are available. Among the changes is the replacement of the blastall executable with separate executables for the different BLAST programs, and changes in option handling. The formatdb utility (C based) has been replaced by makeblastdb (C++ based) and databases formatted by either one should be compatible for identical blast releases. The algorithms remain similar, however, the number of hits found and their order can vary significantly between the older and the newer version.
This is a basic post blast course designed to teach a systematic method of investigating an explosion scene. The course provides instruction in explosives identification and applications, explosives effects, IED component recognition and evidence collection. The course is delivered at a variety of locations throughout the United States based on requests from ATF field divisions.
Rules and regulations are changing in the industries that blasting contractors are found in, all the time, and contractors often find themselves faced with a challenge of a new project or a new regulation that they have not met before.
The SNL Blast Tube Facility consists of trained, experienced personnel with the ability to design and execute tests using different blast tube configurations with varying lengths and diameters to meet a wide array of customer requirements.
The EBM Program uses software and methodologies that incorporate relevant blast codes and building codes to generate a visualized report of the facilities assessed. EBM results provide a visual guide to stakeholders portraying several types of outputs such as structural and injury specific effects. These visuals also assist in planning efforts of crowded areas which can help medical mitigation and planning efforts. The outputs from the EBM Program can range from presentations to reports. 041b061a72