A two-dimensional quantum mechanical modeling has been performed to simulate a nano-scale FinFET by obtaining the self-consistent solution of coupled Poisson and Schrödinger equations. Calculated current-voltage (IV) curves are carefully compared with experimental data to verify the validity of our theoretical work. The transconductance (Gmmax=380) is optimized through varying the Si-fin thickn...

The flying fish (family Exocoetidae) is an exceptional marine flying vertebrate, utilizing the advantages of moving in two different media, i.e. swimming in water and flying in air. Despite some physical limitations by moving in both water and air, the flying fish has evolved to have good aerodynamic designs (such as the hypertrophied fins and cylindrical body with a ventrally flattened surface...

In this paper, the suspension control of a Robot Fish with two 2-DOF pectoral fins, a caudal fin and a volume regulator is introduced. Because the diving depth of the robot fish is related to its volume and the hydrodynamic forces acting on its body, the suspension control is implemented by regulating the attack angle of pectoral fins and the volume of the robot fish body. The attack angle of p...

With the development of the activities in deep sea, the application of the autonomous underwater vehicle (AUV) is very widespread and there is a prominent prospect. The development of an AUV includes many areas, such as vehicle (carrier/platform) design, architecture, motion control, intelligent planning and decision making, etc (Blidberg 1991; Xu et al., 2006). The researchers dedicate themsel...

Compared with traditional underwater equipment powered by propeller, the manta-ray-inspired vehicle MPF mode (Median fin/paired fin) has advantages of stable swimming attitude, high maneuverability, and low noise, etc. As one sources advancing power when swims, flexible deformation pectoral fin is an important factor affecting hydrodynamic performance. In this paper, a mechanical analysis two-d...

Extended surfaces are one of the most important approaches to increase the heat transfer rate. According to the Fourier law, the heat transfer increases by increasing the contact surface of body and fluid. In this study, the effect of heat transfer has been investigated on two sets of engineered porous fins, in which the balls with different materials are sintered together. The fluid flow throu...

Although the pulsed jet is often considered the foundation of a squid's locomotive system, the lateral fins also probably play an important role in swimming, potentially providing thrust, lift and dynamic stability as needed. Fin morphology and movement vary greatly among squid species, but the locomotive role of the fins is not well understood. To begin to elucidate the locomotive role of the ...

We show that the exaggerated changes in fin lengths of zebrafish (Danio rerio) caused by a single gene mutation also resulted in changes in the lateral display rate. However, the increase in this threat display rate only occurred when both fish had very long fins. Fish with shorter fins did not show such an increase when they met fish with longer, same size, or shorter fins. Cutting the long fi...

We have compared the ability of RA to induce apoptosis in regenerating fins and limbs in order to establish whether there may be a possible causal relationship between RA-induced cell death and the different patterning abnormalities observed in these two systems following RA treatment. In regenerating fins RA affects the anteroposterior axis and induces narrowing of the fin and fusion of rays. ...

The objective of this study is to develop a controller to perform trajectory tracking for a Biomimetic Autonomous Underwater Vehicle (BAUV). A mathematical model of a BAUV including both a caudal fin and pectoral fins is proposed for the motion simulation. Control patterns to manipulate the caudal fin and a pair of pectoral fins are developed. For body-caudal fin control, parameters that are es...