Abstract: A window having a frame and at least one sash that is at least partially removable from the frame. The frame includes a sash opening and at least one sash engaging surface. At least one sash having at least one frame engaging surface is slidably mounted in the sash opening of the frame so that the frame engaging surface at least partially engages the sash engaging surface. At least one sash stop is mounted in the frame and is movable between an extended position and a retracted position. The sash stop is structured to maintain the sash in position in the sash opening when the sash stop is in the extended position. The sash stop includes resilient means between the frame and the sash stop for urging the sash stop into the extended position. At least one latch is rotatably mounted on the sash and positioned adjacent to the sash stop. The latch is rotatable between a closed position and an open position. In the closed position, the latch does not engage the sash stop.

Abstract: A method of operation of an ion trap mass spectrometer having a ring electrode and pair of end-cap electrodes in a resonance ejection mode is disclosed. The method includes producing ions from a plurality of biomolecules, applying a trapping RF voltage to the ring electrode, applying an excitation voltage to the end-cap electrodes, scanning the trapping RF voltage in order to sequentially eject the ions, controlling a ration of the amplitude of the trapping RF voltage to the amplitude of the excitation voltage in order that the ratio is generally constant, and determining a ratio of mass to charge of the ejected ions. In one embodiment, a feedback voltage which is proportional to the trapping RF voltage is sensed, and the amplitude of the excitation voltage is controlled as a function of the amplitude of the feedback voltage.

Abstract: The application discloses an apparatus for measuring interfacial properties of a fiber-matrix composite material, such as a ceramic-matrix, metal-matrix or continuous fiber metal-matrix composite; or a support material, such as a fiber-optic fiber support medium. The apparatus includes a linear motion feedthrough having an indentor for pushing a fiber end, a load cell for sensing debonding and frictional sliding loads, and a scanning electron microscope (SEM) for magnifying the material in order to align the indentor with the fiber end. The feedthrough may push the fiber at a predetermined velocity with up to about a 20 pound load force. The SEM may include a vacuum chamber for housing the material, the indentor, the load cell, and a hot stage module. The hot stage module may increase the temperature of the material to about 1500.degree. C.

Abstract: A method for measuring color of objects comprises storing in a computer memory values representative of measurements of the color of an object over a range of angular positions with respect to a photosensor, selecting a measurement area of the object, determining a geometrical structure of the measurement area, and adjusting the measured color in response to the stored values. An associated apparatus is also provided.