Winter Fires

The Fires

Qualitative and semi-quantitative analyses presented in this article suggest that the massive fires caused by the crash of the planes into the World Trade Center Towers and the spillage of large amounts of jet fuel inside the buildings played a major role in their quick collapse on September 11, 2001. It is argued that the WTC fires, while unprecedented in form, magnitude and extent, resembled ...

Determination of Survivable Fires

At NASA, there exists no standardized design or testing protocol for spacecraft fire suppression systems (either handheld or total flooding designs). An extinguisher’s efficacy in safely suppressing any reasonable or conceivable fire is the primary benchmark. That concept, however, leads to the question of what a reasonable or conceivable fire is. While there exists the temptation to ‘over-size...

Underground fires surface.

Genetic exchange by recombination, or reassortment of genomic segments, has been shown to be an important process in RNA virus evolution, resulting often in important phenotypic changes affecting host range and virulence. However, data from numerous systems indicate that reassortant or recombinant genotypes could be selected against in virus populations and suggest that there is coadaptation am...

Fires in the Neighborhood

The first case of poliomyelitis was reported in Korea in 1939. The inactivated polio vaccine (IPV) and the oral polio vaccine (OPV) were introduced in 1958 and 1962, respectively. The National Immunization Program (NIP) was established in 1966 and poliomyelitis was designated as a second-class communicable disease [1]. The number of reported cases decreased dramatically from 6541 in 1960e1964 t...

Fires, Ecological Effects Of