Avram
Avram Bar-Cohen, College Park, MD US
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20100181054 | Plate-Frame Graphite-Foam Heat Exchanger - A heat exchanger for thermally coupling a first fluid and second fluid is disclosed. The heat exchanger comprises plates comprising cores of thermally conductive graphite foam. A plurality of conduits for conveying the first fluid is formed in each core. Each plate further comprises thermally conductive barriers that sandwich the core, wherein the barriers are substantially impervious to r the first fluid and second fluid. Plates are stacked in a frame such that the frame and plates collectively define a plurality of channels for conveying the second fluid. Heat is exchanged between the primary fluid and the secondary fluid through the graphite-foam cores and barriers. | 07-22-2010 |
Avram Bar-Cohen, Bethesda, MD US
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20120293962 | TRENCH-ASSISTED THERMOELECTRIC ISOTHERMALIZATION OF POWER SWITCHING CHIPS - One embodiment includes a power module. The power module includes a power switching device, at least one spot cooler and a base cooler. The at least one spot cooler and base cooler are configured to lower an average surface junction temperature and to isothermalize the surface junction temperature of the power switching device. The at least one spot cooler is embedded in at least one of a heat sink base or base cooler of the power module, and the at least one of the heat sink base or base cooler are attached onto a double side metalized substrate that is attached to the power switching device. In one embodiment, the power module further includes a trench structure cut into the double side metalized substrate. | 11-22-2012 |
Avram Matcovitch, Nesher IL
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20080291460 | Opto-Electronic System and Method for Detecting Perturbations - A method for detecting and measuring physical perturbations sensed by a multi-mode waveguide, through which a number of modes of a coherent electromagnetic wave propagates through and exit from. The method comprises irradiating the exiting electromagnetic wave on one or more two-dimensional sensing arrays comprising a plurality of sensing elements that are sensitive to the irradiated electromagnetic wave; determining, simultaneously, in a parallel manner, absolute values of sensed changes across different zones of the two-dimensional sensing arrays, each zone comprising one or more sensing elements; and summing the absolute values of different groups of different zones to obtain a representation of the perturbations. | 11-27-2008 |
20100277743 | PHOTOREFRACTIVE INTERFEROMETER - A method of coupling optical energy comprising: generating a first beam of optical energy; generating a second beam of optical energy coherent with the first beam; polarizing optical energy from the first and second beams in a same direction; and transmitting the polarized optical energy from the first and second beams into a photorefractive body so that the energy interferes in the body to generate an interference pattern that is extant in substantially all the volume of the body. | 11-04-2010 |
20110085765 | OPTICAL FIBER COUPLER - An optical fiber coupler apparatus for coupling ends of a first and second optical fiber of a substantially equal diameter includes: three cylindrical rods whose longitudinal axes are substantially parallel and in a triangular arrangement, a pressing mechanism, and an urging mechanism. The pressing mechanism presses the rods together, forming a central space that is substantially parallel to the axes, such that an end of the first optical fiber that is inserted into one end of the central space is held substantially collinearly with an end of the second optical fiber that is inserted into an opposite end of the central space. The urging mechanism urges the inserted end of the first optical fiber against the inserted end of the second optical fiber. | 04-14-2011 |
Avram Wahba, Westborough, MA US
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20080276176 | Guestbook - A computer-implemented system automatically creates electronic guestbooks using a computer-based guestbook creation system, which includes a computer (such as a tablet computer) and a digital camera connected to the computer. The guestbook creation system is provided at a particular location attended by guests, such as the banquet hall where a wedding reception is held. Each guest provides content using the computer, such as by using a stylus to write a congratulatory message to the bride and groom. The digital camera captures a digital image of the guest. The computer correlates the signature of each guest with the digital image of that guest to create a guestbook entry for each guest. A multimedia guestbook is created from these guestbook entries. Each entry displays information such as the digital image of the guest and the guest's comments. | 11-06-2008 |
Avram Ya'Akobovich, Haifa IL
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20100170387 | ARMOR PLATE - An armor plate for use in the ballistic protection of a structure against projectiles incoming from an expected threat direction, the plate having an outer face facing the threat direction and comprising a layer of first pellets made of ballistic material of a high density S | 07-08-2010 |
20110114684 | LOAD CARRYING SYSTEM - In an embodiment, a load carrying system for a wearer includes a carrier made of at least one flexible carrier material and comprises a front portion to be disposed at the wearer's front, and a back portion to be disposed at the wearer's back, when the system is worn by the wearer; a load attachment arrangement for detachably attaching a load to at least the front portion; a front load distribution arrangement comprising at least one elongated front load distribution element made of a material more rigid than the carrier material and attached to the front portion of the carrier by a front attachment member different from, and operating independently of, the load attachment arrangement; and a back load distribution arrangement disposed in the back portion of the carrier and separated from the front load distribution arrangement by the material of the carrier. | 05-19-2011 |