Joukowsky actuator disc momentum theory

An Actuator Disc Theory the Shed Wake at Low Tip Speed Ratios

Stock Price Momentum Modeling: A Grounded Theory Approach

Recently, understanding the anomalies in financial markets have severely chal-lenged the efficient market hypothesis (EMH). The price momentum is one of the anomalies described as the unexplained short-term return by Fama and French (1996). The present research strives for modeling the price momentum of winner stock in the Iranian capital market. The grounded theory method was used to explain t...

Cell-shaped Actuator Model from Electrochemistry Theory

The study of electro mobility in human cells and its structure states that they use liquid solutions to obtain movement. In this work it is proposed a model of an artificial cell composed of liquid solutions that permit flexibility of its complete structure. These kind of actuators can generate in the future real robotic arms towards the implementation of inmunologically skeletic prothesis. 1 I...

Rotor aerodynamic power limits at low tip speed ratio using CFD

When investigating limits of rotor aerodynamic models, the Betz limit serves as a solid marker of an upper limit which no model should be able to exceed. A century ago Joukowsky (1912) proposed a rotor aerodynamic model utilizing a rotating actuator disc with a constant circulation. This model has since then been the subject of much controversy as it predicts a power performance that for all ti...

On momentum operator in quantum field theory

The interrelations between the two definitions of momentum operator, via the canonical energy-momentum tensorial operator and as translation operator (on the operator space), are studied in quantum field theory. These definitions give rise to similar but, generally, different momentum operators, each of them having its own place in the theory. Some speculations on the relations between quantum ...