The factorization property of graviton scattering amplitudes is reviewed and shown to be valid only if the “natural” value of the gyromagnetic ratio gS = 2 is employed—independent of spin.

The modular structure of many protein families, such as β-propeller proteins, strongly implies that duplication played an important role in their evolution, leading to highly symmetrical intermediate forms. Previous attempts to create perfectly symmetrical propeller proteins have failed, however. We have therefore developed a new and rapid computational approach to design such proteins. As a te...

This paper provides an investigation into the in uence of wake and skew on a ship propeller performance, based on the potential Boundary Element Method (BEM). Two types of in ow wake from a ship (i.e. Seiun-Maru and MS689) have been investigated for two propeller types; a Conventional Propeller (CP) and a Highly Skewed Propeller (HSP). The computed results include pressure distribution, open wa...

Developing a research autonomous plane for flying in a laboratory space is a challenge that forces one to understand the specific aerodynamic, power and construction constraints. In order to obtain a very slow flight while maintaining a high maneuverability, ultralight structures and adequate components are required. In this paper we analyze the wing, propeller and motor characteristics and pro...

Ship rudders are almost always placed downstream of the propeller so they can take advantage of the increased local velocity due to the presence of the propeller race. The methods discussed in this paper replicate the flow integrated effects of the propeller which generates an accelerated and swirled onset flow onto the rudder. As long as the radial variation in axial and tangential momentum (i...

4 Other perturbations and developments 16 4.1 3rd order responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2 Spin and magnetic effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.3 Elastic constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.4 Electron-Phonon coupling . . . . . . . . . . . . . . . . . . . . . . . . . ....

Abstract Singing is one of the problems that occurs in propeller. However, singing will not happen to every a lot high-speed propellers and on with wide thin blade sizes. One ships have high speed propeller fast patrol boat. To overcome this problem, modifying trailing edge most commonly used methods. Sharpening way reduce vortex shedding. change shape propeller, which can affect performance Th...