Abstract: A gem imaging system includes a stage having a platform configured to hold an object. The system further includes a light source configured to illuminate the object. The system further includes a housing configured to at least partially enclose the object. The housing is configured to position a mobile device such that a camera lens of the mobile device is aligned with the object.

Abstract: A gem imaging system includes a stage having a platform configured to hold an object. The system further includes a light source configured to illuminate the object. The system further includes a housing configured to at least partially enclose the object. The housing is configured to position a mobile device such that a camera lens of the mobile device is aligned with the object.

Abstract: In an embodiment, a gem imaging system includes a stage having a platform configured to hold an object. In an embodiment, the system further includes a light source configured to illuminate the object. In an embodiment, the system further includes a housing configured to at least partially enclose the object, wherein the housing is configured to position a mobile device such that a camera lens of the mobile device is aligned with the object.

Abstract: In an embodiment, a gem imaging system includes a stage having a platform configured to hold an object. In an embodiment, the system further includes a light source configured to illuminate the object. In an embodiment, the system further includes a housing configured to at least partially enclose the object, wherein the housing is configured to position a mobile device such that a camera lens of the mobile device is aligned with the object.

Abstract: Techniques for electrical power transfer in photovoltaic systems are provided. In one aspect, a photovoltaic system includes an array of photovoltaic power producing elements (e.g., concentrator photovoltaic cells); a power receiving unit; and at least one ratiometric DC to DC converter connected to both the array of photovoltaic power producing elements and the power receiving unit. The array of photovoltaic power producing elements can include a plurality of the photovoltaic power producing elements connected in series or in parallel. In another aspect, a method of transferring electrical power from an array of photovoltaic power producing elements to a power receiving unit includes the following step. At least one ratiometric DC to DC converter is connected to both the array of photovoltaic power producing elements and the power receiving unit. The at least one ratiometric DC to DC converter is configured to alter a voltage output from the array.

Abstract: A method and apparatus for the non-contact electrical test of both opens and shorts in electronic substrates. Top surface electrical test features are exposed to an ionization source under ambient conditions and the subsequent charge build up is measured as a drain current by probes contacting corresponding bottom surface features. Opens are detected by an absence of a drain current and shorts are detected by turning off the ionization source and re-measuring the bottom surface probes with a varying bias applied to each probe in the array.

Abstract: A method and apparatus for the non-contact electrical test of both opens and shorts in electronic substrates. Top surface electrical test features are exposed to an ionization source under ambient conditions and the subsequent charge build up is measured as a drain current by probes contacting corresponding bottom surface features. Opens are detected by an absence of a drain current and shorts are detected by turning off the ionization source and re-measuring the bottom surface probes with a varying bias applied to each probe in the array.

Abstract: An apparatus for imaging the mouth of a user while detecting the speech of the user. The apparatus includes a headset. A video camera mounted to the headset is positioned so as to capture a frontal view of the mouth of a user. A microphone mounted to the headset is positioned so as to detect the speech of the user. An illumination source illuminates the mouth of the user. A communication device transmits the output of the video camera and the output of the microphone to a computer.

Abstract: An automated method and improved device provide a measurement of blood flow through the heart by the detection and analysis of radioactivity emitted by a radioactive tracer introduced into a patient's bloodstream. Real time, cardiac cycle by cardiac cycle information is processed and displayed to provide diagnostically useful information on an essentially ongoing basis as the patient is being tested.

Abstract: A method and improved apparatus for locating data of interest on a cathode ray tube display in a system for characterizing blood flow through the heart is disclosed. Apparatus comprising an adjustable cursor control circuit is utilized to generate a plurality of stable horizontal or vertical cursor lines on the cathode ray tube display thereby enhancing the user's ability to locate data of interest.