investigation of physiological responses to water deficit in sesame (sesamum indicum l.) genotypes can help to identify effective mechanisms of plant resistance to stress. therefore, chlorophyll content, proline, soluble carbohydrates, net photosynthesis rate, stomatal conductance, maximum quantum efficiency (fv/fm), plant height and shoot dry weight in a complete block factorial pot experiment...

Heat engines constitute the major building blocks of modern technologies. However, conventional heat with higher power yield lesser efficiency and vice versa respect various power-efficiency trade-off relations. This is also assumed to be true for operating in quantum regime. Here we show that these relations are not fundamental. We introduce deliver maximum Carnot one-shot finite-size These co...

In this work, it is investigated the behavior of efficiency at maximum power a quantum dot molecule, acting as device for photovoltaic conversion. A theoretical approach using master equation, considering effect energy offsets, and width barrier, identifies realistic physical conditions that enhance response photocell. The results show potentiality increasing gain in 30\% delivered per molecule...

Machines are only Carnot efficient if they are reversible, but then their power output is vanishingly small. Here we ask, what is the maximum efficiency of an irreversible device with finite power output? We use a nonlinear scattering theory to answer this question for thermoelectric quantum systems, heat engines or refrigerators consisting of nanostructures or molecules that exhibit a Peltier ...

A theoretical study has been made to compare the quantum efficiencies of interwell and intrawell radiative transitions in quantum cascade lasers based on AlxGa1 xAs/GaAs technology. Radiative and non-radiative intersubband transition rates were calculated for a range of temperatures between 4 K and 300 K at an applied electric field of 4 kVcm 1 for structures designed to emit in both mid-infrar...

The role of the superposition principle is discussed for the quantum-mechanical Carnot engine introduced by Bender, Brody, and Meister [J. Phys. A 33, 4427 (2000)]. It is shown that the efficiency of the engine can be enhanced by the superposition of quantum states. A finite-time process is also discussed and the condition of the maximum power output is presented. Interestingly, the efficiency ...