Abstract Novel-aircraft concepts consider the possibility of placing propulsor very close to fuselage ingest incoming airframe boundary layer. In this configuration, engine takes inflow at a reduced velocity, consuming less fuel in combustion process. However, induces series noise consequences that alter tonal and broadband components. The present work reports an experimental investigation anal...

Both actor-network theory and activity theory call attention to the coexistence of people and technology. Although both theories provide analytical tools to understand the nature of the reciprocal action-shaping of humans and nonhumans, each puts emphasis on different conceptual elements of human activity. In this paper, the authors examine both activity theory and actor-network theory and pres...

We study the traffic flow on a highway with ramps through numerical simulations of a hydrodynamic traffic flow model. It is found that the presence of the external vehicle flux through ramps generates a new state of “recurring humps” (RH). This novel dynamic state is characterized by temporal oscillations of the vehicle density and velocity which are localized near ramps, and found to be the or...

The species, previously known as "Eobrachycentrus kitayamanus (Tsuda 1942)" originally described based on a male specimen, is here associated with the larval stage described by Akagi (1962) as "Micrasema sp. MD". Because both the adult and larva of this species have many unique characters within the family Brachycentridae, a new genus, Tsudaea, is erected for this species. Descriptions and illu...