The present invention includes a means to sustain a rocket torpedo's supercavation envelope to enhance the speed, maneuverability and resistance to percussion based counter measures. The invention includes machines using those aspects of the invention. The invention may also be used to upgrade, repair, or retrofit existing machines, using methods and components known in the art. The present invention comprises a porous plate technique never associated with torpedo design. This approach differs f...

A cementitious porous pavement comprising a hydraulic conductivity greater than about 0.0001 cm/sec and a depth of at least three inches.

A method in which a SOI substrate structure is fabricated by oxidation of graded porous Si is provided. The graded porous Si is formed by first implanting a dopant (p- or n-type) into a Si-containing substrate, activating the dopant using an activation anneal step and then anodizing the implanted and activated dopant region in a HF-containing solution. The graded porous Si has a relatively coarse top layer and a fine porous layer that is buried beneath the top layer. Upon a subsequent oxidation ...

An implantable medical device includes a porous metal foam or foam-like structure having pores defined by metal struts or webs wherein the porous structure has directionally controlled pore characteristics. The pore characteristics controlled include one or more of the metal structure porosity, pore size, pore shape, pore size distribution and strut thickness. The pore characteristics may vary in one or more directions throughout the structure. Preferably the pore characteristics are controlled ...

Porous silicon particles are prepared from a metallurgical grade silicon powder having an initial particle size greater than about 1 micron is presented. Each porous silicon particle comprises a solid core surrounded by a porous silicon layer having a thickness greater than about 0.5 microns.

Method and structure for minimizing the downsides associated with microelectronic device processing adjacent porous dielectric materials are disclosed. In particular, chemical protocols are disclosed wherein porous dielectric materials may besealed by attaching coupling agents to the surfaces of pores. The coupling agents may form all or part of caps on reactive groups in the dielectric surface or may crosslink to seal pores in the dielectric.

There are several different applications where it is desirable to increase the amount of material that can be introduced to the surface of a microresonator that has whispering gallery modes. The use of a porous surface on the microresonator permits greater amounts of the material to be captured on or near the surface of the microresonator, resulting in an increased optical interaction between the material and the light propagating in the whispering gallery mode(s) of the microresonator.

A single chip wireless sensor (1) comprises a microcontroller (2) connected by a transmit/receive interface (3) to a wireless antenna (4). The microcontroller (2) is also connected to an 8 kB RAM (5), a USB interface (6), an RS232 interface (8), 64 kB flash memory (9), and a 32 kHz crystal (10). The device (1) senses humidity and temperature, and a humidity sensor (11) is connected by an 18 bit .SIGMA..DELTA. A-to-D converter (12) to the microcontroller (2) and a temperature sensor (13) is conne...

These glass bodies are light weight porous structures such as a boules of high purity fused silica (HPFS). More specifically, the porous structures are supports for HPFS mirror blanks. Porous glass is made utilizing flame deposition of pure silica or doped silica in a manner similar to the production of high purity fused silica. Bubbles or seeds are formed in the glass during laydown. Finely divided silicon carbide (SiC) particles are used to form the bubbles. At least one layer of porous glass ...

A metallic porous body includes a number of protrusions formed on obverse and reverse sides of a metal sheet so as to protrude alternately with one another; each of the protrusions being formed into an truncated-shape wherein an opening portion punched out in the direction from the upper-side bottom to the lower-side bottom is formed in the upper-side bottom of each protrusion, and a vertical distance (d) between the upper-side bottom on the obverse side and the upper-side bottom on the reverse ...