The present invention provides a method of extracting and recovering embryonic like stem cells, including, but not limited to pluripotent or multipotent stem cells, from an exsanguinated human placenta. A placenta is treated to move residual umbilical cord blood by perfusing an exsanguinated placenta, preferably with an anticoagulant solution, to flush out residual cells. The residual cells and perfusion liquid from the exsanguinated placenta are collected, and the embryonic-like stem cells are separated from the residual cells and perfusion liquid. The invention also provides a method of utilizing the isolated and perfused placenta as a bioreactor in which to propagate endogenous cells, including, but not limited to, embryonic-like stem cells. The invention also provides methods for propagation of exogenous cells in a placental bioreactor and collecting the propagated exogenous cells and bioactive molecules therefrom.

Post-partum mammalian placenta, its use and placental stem cells therefrom

A pulsed radar system has improved signal to noise characteristics obtained by suppressing phase noise. Means are provided to store a copy of the transmitted RF signal pulse, which copy contains any phase noise of the RF carrier that is transmitted. The signal copy is retained and following a delay interval the signal is mixed in a high frequency electronic RF mixer with the received RF pulse signal, the latter of which represents a reduced level signal as reflected by an object back to the system receiver's antenna following the lapse of an interval of time. The RF mixer produces an intermediate frequency signal output in which the phase noise is suppressed thereby enhancing the receiver's signal to noise ratio. A novel pulsed signal delay circuit is employed in the foregoing which retains the copy by continuously recirculating a fraction of that RF input pulse over time until it is needed; as when the pulse is to be applied to the RF mixer. The delay circuit includes a fiber optic cable that functions as a delay line. In a related invention the pulsed signal delay circuit is used as an element of a RF receiver to stretch the width of incoming pulses in the time domain to permit a more narrowband signal filter thereby increasing the signal to noise ratio.

Noise suppressor for pulsed signal receivers

An optical sensor is disclosed of the type typically including an optical system for focusing light onto a focal plane. The optical system having a predetermined Numerical aperture which provides a corresponding level of spatial resolution. The optical sensor also including detectors for converting the light focused onto the focal plane into electrical signals including imaging data. The optical sensor further including a processor which processes the imaging data in order to provide a desired level of spatial resolution which is substantially higher than the corresponding level of spatial resolution.

Apparatus and method for providing optical sensors with super resolution

The present invention provides methods of and apparatus for determining the inertial attitude of an aerospace vehicle. In one embodiment, the invention provides a rotational astronomical object-sighting concept to determine the inertial attitude of an axis of the aerospace vehicle without the star identification or dragback. In another embodiment, the invention provides an attitude measurement apparatus comprising a high sensitivity optical sensor and a low power inertial sensor.

Miniature attitude sensing suite

A long range wireless phasing voltmeter determines the phase difference between the time-varying voltage carried on a reference electrical conductor and another, field conductor. The voltage signal from the reference conductor is measured by a reference probe and compared by a first unit in communication with that reference probe to a 60 Hz signal generated from a GPS receiver. The phase difference, in the form of a nine-bit, audible signal using frequency shift keying to modulate the carrier frequency, is transmitted to a second unit perhaps miles away. A receiver in the second unit decodes the signal and uses another 60 Hz signal generated from another GPS receiver to re-create and then forward a surrogate of the original reference voltage signal to a meter probe that is measuring the signal on a field conductor. The meter probe can then compare the two signals to determine the phase angle difference.

Long range phasing voltmeter

A method and apparatus for determining the orientation of the optical axis of radiometer instruments mounted on a satellite involves a star sensing technique. The technique makes use of a servo system to orient the scan mirror of the radiometer into the path of a sufficiently bright star such that motion of the satellite will cause the star's light to impinge on the scan mirror and then the visible light detectors of the radiometer. The light impinging on the detectors is converted to an electronic signal whereby, knowing the position of the star relative to appropriate earth coordinates and the time of transition of the star image through the detector array, the orientation of the optical axis of the instrument relative to earth coordinates can be accurately determined.

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Jack E Wilcox

Papers

Method and apparatus for radiometer star sensing

Camera tube target protection system employing variable raster size to prevent burn-in

Apparatus for producing a single sideband signal in a sampling system

Sampled reentrant data processing system

Multi-function apparatus for television receivers