The study included 100 samples collected from different locations of the homes were located in the area of Ali Saleh in Baghdad 6 species were isolated from fungi and the most common genus or species of fungi isolated were Aspergillus fumigatus by frequency ratio of 25.84%, and occurrence ratio of 23%, Penicilium by frequency ratio of 21.34%, and o
In view of the low-frequency acoustic insulation performance and poor pressure resistance of a single cavity at present, finite element software COMSOL is used to establish an analysis model to calculate the sound transmission loss (TL) and compression performance of here the sound-insulating material with combined cone cavities.The effectiveness o
Anthropogenic activities involve the extraction, transformation and use of natural resources.During the process of extracting useful mineral substances on the surface or underground, particles or gases appear in the work environment resulting from the removal or natural release from the rock mass.The process of transforming useful mineral substance