Title of Dissertation: Computational Investigation of Micro-Scale Coaxial Rotor Aerodynamics in Hover Vinod K. Lakshminarayan, Doctor of Philosophy, 2009 Dissertation directed by: Dr. James D. Baeder Department of Aerospace Engineering In this work, a compressible Reynolds-Averaged Navier Stokes (RANS) solver is extended to investigate the aerodynamics of a micro-scale coaxial rotor configurati...

chrysomya bezziana villeneuve is the most important fly, which produces myiasis, exists as an obligate ectoparasite in the ani­mals, and afflicts human. poor hygiene and working in contaminated areas particularly during warm seasons provide a situa­tion to infest by this parasite. infestation in human and livestock are often observed in wounds, normal body orifices such as eyes, ears, nose, and...

conclusions intestinal myiasis in humans is probably an accidental myiasis, related to the ingestion of contaminated uncooked food or water containing fly larvae, especially in individuals with poor hygienic conditions. nevertheless, this is the first reported case of intestinal myiasis due to l. illustris in iran. case presentation herein, we present a case of accidental human intestinal myias...

A numerical method based on Reynolds Averaged Navier–Stokes (RANS) equations and a high-efficiency trim model is developed to simulate the aerodynamics of coaxial rotor. Farassat 1A are used for prediction thickness loading noise. Hover cases different thrust coefficients with torque balance conducted. The sound pressure history observation points positioned below rotor disk plane analyzed. Res...

In this article, a novel quadcopter capable of changing shape midflight is presented, allowing for operation in four configurations with the capability sustained hover three. This accomplished without requiring actuators beyond motors typical quadcopter. Morphing achieved through freely rotating hinges that allow vehicle arms to fold downwards by either reducing or reversing thrust forces. Cons...

Inventive approaches are constantly being revealed in the field of vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV) configuration concepts designs. To date, a body-associated UAVs for augmented lift remains unclear among other approached The current paper investigates mechanism high-lift ducted fan mounted central body VTOL UAV We report an unresolved design disc-shaped with s...

a survey on the hover flies (diptera: syrphidae) fauna of northern iran, between 2010 and 2011, led to the discovery of the species pipiza accola violovitsh, 1985. both the genus and species are newly recorded from iran. all the specimens were collected from gilan and mazandaran provinces, using malaise traps. the diagnostic characters of p. accola and its geographical distribution is presented.

fly ash is one of the most plentiful and versatile of the industrial by-products. at present, nearly 150 million tonnes of fly ash is being generated annually in india posing dual problem of environmental pollution and difficulty in disposal. this calls for establishing strategies to use the same effectively and efficiently. however, it is only in geotechnical engineering applications such as t...