Efficiency of generation of net unidirectional current in an adiabatically driven symmetric periodic potential system is studied. The efficiency shows a maximum, in the case of an inhomogeneous system with spatially varying periodic friction coefficient, as a function of temperature. The ratchet is not most efficient when it gives maximum current. The direction of current may also be reversed a...

We present measurements of mixing efficiency in a run-down gravity current created by lock exchange in a channel. Experiments were designed to extend to particularly high Reynolds number (of order 10, based on the current depth), at which mixing is no longer affected significantly by viscosity. Under these conditions, we observe that the run-down density profiles in the channel achieve full sel...

We study theoretically the efficiency of an asymmetric superconducting quantum interference device (SQUID)which is constructed as a loopwith three capacitively and resistively shunted Josephson junctions. Two junctions are placed in series in one arm and the remaining one is located in the other arm. The SQUID is threaded by an externalmagnetic flux and driven by an external current of both con...

Energy efficiency is very specific to end-use applications or particular systems. However, on an aggregate economy wide basis, energy efficiency does not provide a useful measure for comparison due to variations in the structure of energy supply and the end-use energy applications. Reduction in energy intensity is a part of the sustainable development program since it is closely linked to the m...

BACKGROUND Poor reading efficiency is the most persistent problem for adults with developmental dyslexia. Previous research has demonstrated a relationship between left posterior temporal cortex (pTC) function and reading ability, regardless of dyslexia status. OBJECTIVE/HYPOTHESIS In this study, we tested whether enhancing left lateralization of pTC using transcranial direct current stimulat...

The article presents research methods for the developed irrigation systems, increasing efficiency of water use in agricultural sector. Based on an analysis literature and patent sources, authors present ways modifying such as physical hydraulic barriers magnetic treatment water. also results laboratory tests proposed drip system. It investigates five different types trays to quantify performanc...