It is now a banal truth that the environment is being subjected to plenty of environmental hazards. These are attributable to pollution that has completely overwhelmed the environment which in turn is also responsible for bringing about atrocious changes to the environment. The principle reason behind this change is increased carbon emission. Every day, a huge amount of carbon is released in th...

CubeSats are emerging as low-cost tools to perform astronomy, exoplanet searches and earth observation. These satellites can target an object for science observation for weeks on end. This is typically not possible on larger missions where usage time is shared. The problem of designing an attitude control system for CubeSat telescopes is very challenging because current choice of actuators such...

A new method for reducing large-scale mixing noise from dual-stream jets is presented. The principle is reduction of the convective Mach number of turbulent eddies that produce intense downward sound radiation. In a jet representing the coaxial exhaust of a turbofan engine, this is achieved by tilting downward, by a few degrees, the bypass (secondary) plume relative to the core (primary) plume....

Physics of Failure models are mathematically derived, deterministic models based on knowledge of failure mechanisms and the root causes of failures. Failure rates are predicted based on stresses, material properties, individual use and environmental conditions. Fixed Vanes are primarily used in fluid machines (turbines, pumps, and windmills etc.) and in aircraft (control surfaces) apart from a ...

Numerical simulations were performed to investigate pressure fluctuations in the S-shaped region of a pump-turbine model. Analyses focused on pressure fluctuations in the draft tube and in the gap between the guide vanes and runner. Calculations were made under six different operating conditions with a constant guide vane opening, and the best efficiency point, runaway point, and low-discharge ...

In this paper, we propose an experimental and computational model to challenge the dynamic body boundary problem, as seen in the rubber hands illusion and phantom limbs. Our strategy examines an agent‟s “attention shift”. A computational model (Iizuka & Ikegami, 2005) was used to explore how a body and sensor can be made inseparable. A model agent was required to determine the number of vanes o...

A low cross-polarization slot array antenna in the narrow wall of ridge waveguide is presented. A non-angled slot which is created in the narrow wall of the ridge waveguide is considered to be used as radiating resonant slot. The normalized resistance and normalized reactance curves are presented for design purposes. A six element slot array waveguide antenna with ridges on its narrow wall is t...

We define a right-angled mock reflection group to be a group G acting combinatorially on a CAT(0) cubical complex such that the action is simply-transitive on the vertex set and all edge-stabilizers are Z2. We give a combinatorial characterization of these groups in terms of graphs with local involutions. Any such graph Γ not only determines a mock reflection group, but it also determines a rig...

Abstract Bird feathers sustain bending and vibrations during flight. Such unwanted could potentially cause noise flight instabilities. Damping alter the system response, resulting in improving quiet flight, stability, controllability. Vanes of are known to be indispensable for supporting aerodynamic function wings. The relationship between hierarchical structures vanes mechanical properties fea...