Methods of preparing Group IVA and Group VIA organometallic compounds, particularly Group IVA organometallic compounds, are provided. Such manufacturing methods employ an amine and/or phosphine catalyst in a transalkylation step and may be performed in a batch, semi-continuous or continuous manner.

The invention concerns a two-stroke internal combustion engine supplied with gasoline, diesel, fuel, or other conventional fuel comprising a piston (2)-cylinder (1) assembly, said cylinder (1) providing exhaust ports (11), said piston (2)-cylinder (1) assembly providing a head (5) slidable within said cylinder (1) between the Top Dead Centre of the piston (2) stroke and a closure position of the exhaust ports (11), said slidable head (5) providing a transfer valve (9) for fresh air or fresh air-…

A method of depositing a Group IV metal-containing film on a substrate by conveying one or more of certain Group IV organometallic compounds in a gaseous phase to a deposition reactor containing a substrate and decomposing the one or more Group IV organometallic compounds to form a film of a Group IV metal on the substrate is provided. Such Group IV metal-containing films are particularly useful in the manufacture of electronic devices.

Provided is a variable resistance random access memory device having an n+ interfacial layer and a method of fabricating the same. The variable resistance random access memory device may include a lower electrode, an n+ interfacial layer on the lower electrode, a buffer layer on the n+ interfacial layer, an oxide layer on the buffer layer and having a variable resistance characteristic and an upper electrode on the oxide layer.

A padded corner bumper comprises an elongated core formed of a cushioning material, an outer decorative cover formed of vinyl-coated fabric, and a backing material formed of polypropylene mesh. The core has a front, a back coextensive with the front, and a continuous side edge extending between the top and bottom. The outer decorative cover and backing material are stitched together to form a casing that completely surrounds the core, the backing being positioned only over the back of the core. …

An abrasive tool includes a superabrasive grain component, a filler component that comprises hollow bodies and a vitreous bond. Natural and synthetic diamond, cubic boron nitride and combinations thereof can be employed as the superabrasive grain component. The vitreous bond component includes zinc oxide and at least two alkali metal oxides. The vitreous bond component can further include barium oxide. A method for producing an abrasive tool includes combining a superabrasive grain component, a …

Systems and methods for secure multimedia authentication with discrete level tamper localization are described. In these aspects, the term “discrete” means that tamper localization is at the pixel level with respect to an image or video data, or at the sample level with respect to audio data. More particularly, and in one aspect, multimedia is evaluated to determine authenticity of the multimedia. This evaluation is based on data block(s). Responsive to determining that the multimedia is not aut…

A wave guide fitted at the output of a loudspeaker, in front of the membrane or in front of the orifice of a compression chamber, along the axis of the transducer being considered, and comprising a conduit which expands from its input to its output. The area of the output orifice of the wave guide is planar and oblong, that its conduit comprises a passage between the input orifice and the output area, adapted to guide the waves along a general direction from which the shortest paths allowed in t…

A three-phase electrical transformer of the core-form type including wye-wye connected primary and secondary windings having grounded neutrals. The magnetic core has three winding legs for the primary and secondary windings, and at least one additional leg. An auxiliary winding is disposed on the additional leg and connected to indicating means which provides a signal when the voltage induced into the auxiliary winding by zero sequence flux flowing through the additional leg reaches a predetermi…

The invention provides techniques for implementing secure transactions using an instrument referred to as “executable digital cash.” In an illustrative embodiment, a first user generates a piece of digital cash representing an offer made by that user. The piece of digital cash includes a digital certificate authorizing the first user to make specified transfers, and an offer program characterizing the offer. The piece of digital cash is broadcast or otherwise transmitted to one or more additiona…