Global active noise control has been obtained on the tonal noise from a small centrifugal blower, similar to those used in laptop computers. Compact control systems were investigated for two configurations. The blower was mounted in both a short rectangular duct and in a mock laptop case that was modeled as a two-dimensional rectangular enclosure. Secondary sources and error sensors were locate...

Rice fields host a large diversity of arthropods, but investigating their population dynamics and interactions is challenging. Here we describe the modification and application of a leaf blower-vac for suction sampling of arthropod populations in rice. When used in combination with an enclosure, application of this sampling device provides absolute estimates of the populations of arthropods as ...

Almond harvest accounts for a significant amount of PM10 emissions in California each harvest season. This paper addresses the reduction of blower passes during the harvest from 3 to 1 as a possible mitigation measure. Ambient total suspended particulate and PM10 sampling was conducted at two orchards during harvest with alternating control and experimental treatments. Onsite meteorological dat...

Through a mechatronic system, the project of linear blower was born from difficulty found by textile industry (which uses cotton as raw material) in keeping their machines and equipment proper working conditions without residue accumulation, causing several problems damaging final product. To avoid this problem, solution used until then manual cleaning process, which demanded qualified labor fo...