Abstract: Systems and methods are provided for testing a device. A test fixture is provided for interfacing a device with a host system for generating tests to be run on the device. The device is placed in a scan-test mode, according to a built-in self-test of the device. A scan clock signal and scan pattern are provided to allow scan-tests to be run on the device. If the device passes the scan test, the device is placed in a real-time test mode. At-speed tests may then be run on the device to provide a robust test and identify portions of the device that may be faulty.

Abstract: A color changing water toy generally includes a porous absorbent core that absorbs water, typically made from a soft open cell foam. The porous core is covered with colorful graphics, at least some of which are printed with thermochromically sensitive paint or dye. The absorbent core is preferably covered with a porous skin typically made with fabric that has been printed with the colorful graphics. At least some of the graphics are printed with thermochromically sensitive paint or dye. Thus, the color changing water toy absorbs water that is readily released upon the water toy striking an object and also changes color depending upon the temperature of its environment.

Abstract: A method to recover lost data in a piece of information transmitted from a number of server computers to a client computer. The method includes the steps of transmitting by the server computers a piece of server data to the client computer. The piece of server data includes the piece of information and at least one redundant symbol. Due to the failing of at least a part of one of the server computers, data are lost. The client computer identifies such a loss. The client computer recovers the lost data using the one or more redundant symbols. Then, the remaining non-failing server computers transmit another set of server data, which include another piece of information with at least one additional redundant symbol over what was previously transmitted to the client computer. This will ensure that the client computer can recover additional data lost due to the failing of at least a part of another server computer.

Abstract: Methods for making hermetic silicon carbide matrix composite structures by CVI. A fibrous preform is created by winding strands of yarn of refractory fiber material helically about a graphite mandrel. Impregnation of the preform is carried out in a subatmospheric pressure zone at a pressure of about 700 Pa or less by maintaining a relatively slow flow of a mixture of helium and an alkyl chlorosilane through a coating zone heated to a temperature of between about 1100.degree. to 1200.degree. C. at a rate between about 2 and about 10 times the diffusion rate of the gaseous atmosphere in the fibrous preform. Coating is continued until silicon carbide impregnates the interstices of the fibrous preform and preferably deposits an outer layer of dense pore-free silicon carbide thereupon. The resultant structures are hermetic and provide leak-free containment of gases such as helium at temperatures of as high as 1,000.degree. C. and a pressure differential as high as about 20 MPa.