Lacuna seeker

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The Structure Lacuna

Molecular symmetry is intimately connected with the classical concept of three-dimensional molecular structure. In a non-classical theory of wave-like interaction in four-dimensional space-time, both of these concepts and traditional quantum mechanics lose their operational meaning, unless suitably modified. A required reformulation should emphasize the importance of four-dimensional effects li...

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A Lacuna in the Guidelines

Physicians treat chronic hypertension almost exclusively in ambulatory care settings according to evidence-based guidelines1 based on blood pressure (BP) measurements obtained under prescribed conditions.2 Other recommendations cover how to deal with hypertension in dialysis units2 and emergency departments,3 but none address a very commonly encountered problem: what to do about acutely elevate...

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Tomographic Scanning Imaging Seeker

The tomographic scanning (TOSCA) imaging seeker concept is presented. The system is based on conical scan reticle seeker optics modified with an eccentrically rotating circular aperture. After signal preprocessing, an image is extracted using tomography reconstruction techniques. Simulation results are provided to show the reconstruction quality. The concept, using a single pixel and a simple r...

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On a New Seeker Gimbal

Ross-Hime Designs, Inc. presents the results of its research and development of “Low Cost Light-Weight Seeker Gimbals.” The Super Seeker, a patent-pending gimbal design, offers a swiveling yoke design lower in cost than current gimbal designs and weighing significantly less than traditional gimbal systems while enabling a doubling of the sensor’s surface area. The swiveling yoke design has buil...

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ژورنال

عنوان ژورنال: Nature

سال: 1991

ISSN: 0028-0836,1476-4687

DOI: 10.1038/350268e0