The penguin is the fastest underwater swimmer among wing-propelled diving birds. To figure out mechanism for its excellent swimming, hydrodynamic performance of a wing numerically investigated using an immersed boundary method with incompressible flow solver. This study examines effects feathering, flapping, and Strouhal number (St) under preset motion. Results indicate that feathering primary ...

Flapping flippers or fins are widely employed in biomimetic and bioinspired aquatic robots that imitate natural swimmers, such as fish dolphins. This article involves robotic biomimetics of the penguin, which is often overlooked an excellent swimmer benefiting from agile wings. To achieve equivalent swimming skills robot, wing motion a real penguin was investigated. Based on findings, we develo...

Recently, flapping robots are noticed by many researchers, and many challenges are being made toward the realization of flight motions like insects, birds and so on. The purpose of this work is to develop flapping robots using a new type of piezoelectric material, that is, piezoelectric fiber composites. By using the composites, actuating fibers and sensing fibers can be embedded into a wing as...

The aim of this work is to design and fabricate a small scale de-feathering machine investigate into the optimal operational parameters for de-feathering. fabricated has its electric motor placed by side easy coupling, detachability prolonged life span motor. It door removal carcass. materials used fabrication were carefully selected ensure minimal damage scalding temperature 60 o C, time 56.56...

f)oor bird doomed to expiate a fit of presumption by the oss of its plumes. Thus might he have been spared the torture of a feathering; and ourselves the pain, little less severe, of inflicting it. But to speak seriously, we think the honour and dignity of the College of Physicians compromised by the admission of a paper which the Editors of at least two of the three Medical Journals published ...

The retail market share of organic eggs in Denmark is high, and the consumers expect high animal welfare standards in the organic production. Documentation of animal welfare is important, however, knowledge about the associations between animal-based welfare indicators is limited. The aims of the study were to investigate the associations between selected welfare indicators at two ages (peak an...

We present Smoothed Particle Hydrodynamics (SPH) simulations of the response of gas discs to a spiral potential. These simulations show that the commonly observed spurs and feathering in spiral galaxies can be understood as being due to structures present in the spiral arms that are sheared by the divergent orbits in a spiral potential. Thus, dense molecular cloud-like structures generate the p...