Abstract: The present disclosure is directed to designing dyes and methods to alter the parameters controlling the dipole-dipole coupling of dyes bound to a nucleotide oligomer architecture, which are used to propagate excitons for use in next generation room temperature quantum information systems. The disclosed dyes and methods are directed to changing the dye stability, symmetry, overlap, and steric hindrance of the dyes to fine tune aggregate systems.

Abstract: The present disclosure is directed to designing dyes and methods to alter the parameters controlling the dipole-dipole coupling of dyes bound to a nucleotide oligomer architecture, which are used to propagate excitons for use in next generation room temperature quantum information systems. The disclosed dyes and methods are directed to changing the dye stability, symmetry, overlap, and steric hindrance of the dyes to fine tune aggregate systems.

Abstract: The present disclosure is directed to an all-optical excitonic switch comprising one or two oligonucleotides that comprises in turn donor/acceptor chromophores and photochromic nucleotide and is assembled with nanometer scale precision using DNA nanotechnology. The disclosed all-optical excitonic switches operate successfully in both liquid and solid phases, exhibiting high ON/OFF switching contrast with no apparent cyclic fatigue. The all-optical excitonic switches disclosed herein have small footprint and volume, low energy requirement, and potential ability to switch at speeds in tens of picosecond.

Abstract: An airfoil for use in a gas turbine engine is disclosed herein. The airfoil includes a pressure side wall, a suction side wall, and a cooling air distribution system. The suction side wall is arranged opposite the pressure side wall. The cooling air distribution system is formed internal to at least one of the pressure side wall and the suction side wall. The cooling air distribution system is configured to distribute cooling air through the airfoil to cool the airfoil.

Abstract: The present disclosure is directed to designing dyes and methods to alter the parameters controlling the dipole-dipole coupling of dyes bound to a nucleotide oligomer architecture, which are used to propagate excitons for use in next generation room temperature quantum information systems. The disclosed dyes and methods are directed to changing the dye stability, symmetry, overlap, and steric hindrance of the dyes to fine tune aggregate systems.

Abstract: An airfoil for use in a gas turbine engine is disclosed herein. The airfoil includes a pressure side wall, a suction side wall, and a cooling air distribution system. The suction side wall is arranged opposite the pressure side wall. The cooling air distribution system is formed internal to at least one of the pressure side wall and the suction side wall. The cooling air distribution system is configured to distribute cooling air through the airfoil to cool the airfoil.

Abstract: A gas turbine stationary vane having an airfoil portion and inner and outer shrouds. Five serpentine radially extending cooling air passages are formed in the vane airfoil. The first passage is disposed adjacent the leading edge of the airfoil and the second passage is disposed adjacent the trailing edge. A first portion of the cooling air enters the first passage, from which it flows sequentially to the second, third, fourth and fifth passages. Additional cooling air enters the third passage directly, thereby bypassing the first and second passages and preventing over heating of the cooling air by the time it reaches the fifth passage. A radial tube extends through the second passage and directs cooling air through the airfoil, with essentially no rise in temperature, to an interstage cavity for disc cooling. Fins project into each of the passages and serve to increase the effectiveness and flow rate of the cooling air.

Abstract: An autoreferencing liquid level sensing apparatus and method determines the presence of a liquid by observation of the convective cooling rate of a heated temperature sensor. The temperature measured by the temperature sensor is compared with an adapting temperature reference whose initial value is determined from the initial measured temperature and whose value increases during the heating at a rate proportional to the rate of heating of the temperature sensor and the initial temperature. This comparison enables discrimination of whether the convective cooling rate of the temperature sensor is above or below a predetermined level. Because the rate of convective cooling depends in large part on the thermal capacity of the fluid surrounding the sensor, the convective cooling rate determination allows discrimination of whether the temperature sensor is surrounded by a gas or a liquid, or surrounded by one of two immiscible liquids having differing thermal properties.

Abstract: A silicon temperature sensitive resistive element for employment as a convective cooling rate sensor. The convective cooling rate sensor comprises a small chip of silicon having an impurity ion cncentration level high enough to assure that the sensor exhibits an extrinsic positive temperature coefficient of resistance throughout a desired temperature range. The silicon chip is connected to a pair of metal electrodes. These metal electrodes have a cross-sectional area providing a desired rate of conductive cooling through these electrodes. A predetermined amount of electrical power is applied to the convective cooling rate sensor via the electrodes to cause ohmic self-heating of the sensor. The temperature of the sensor is determined by measuring the resistance of the sensor. The rate of temperature change is indicative of the rate of convective cooling of the sensor by the medium surrounding the sensor.

Abstract: A large solid horn has an energy output and an energy input. The output is useful for application to a load. The horn is provided with a groove in the horn side surface about the horn axis and is preferably located nearer the output end thereof. This groove functions to correct fall off in amplitude of sonic energy at or near the outer edge portion of the horn output end.