An illuminator for use with an optical system for inspecting samples such as experimentally grown proteins includes a light source, a light refracting optical element such as fresnel lens, and an opalescent light diffusing plate dispos ed between the light source and the fresnel lens. An adjustment device mechanically coupled to the light diffusing plate is operable for varying the optical distanc...

A method and apparatus for feeding wire in a welding system include one or more motors disposed adjacent the wire to drive it. A wire feed motor is also disposed along the wire path, and is closer to the source of wire than the torch, and closer to the source than the one or more motors. The motors may be a pair motors disposed on opposite sides of the wire and move the wire to and away from an ar...

In an OFDM system the same Walsh code is used at the same time for a plurality of transmitters. The multiple transmitters can be from the same, or different devices (e.g., different base stations on the downlink, different terminals on the uplink). Each subcarrier/antenna combination will share a similar pilot Walsh code, except for the fact that the scrambled spread pilot signals will be phase sh...

An externally ported speaker enclosure includes a primary enclosure having a port or opening. The primary enclosure may continuously vary from a first dimensi on to a dimension of the port or opening. Alternatively, a duct or tube may extend from, and external to, the primary enclosure. The duct or tube may transition from a first dimension to a dimension of the port or opening. The dimensions of ...

Biocompatible tissue implants are provided for repairing a tissue injury or defect. The tissue implants comprise a biological tissue slice that serves as a sour ce of viable cells capable of tissue regeneration and/or repair. The biological tissue slice can be harvested from healthy tissue to have a geometry that is suitable for implantation at the site of the injury or defect. The harvested tissu...

A fret-shaped sheath for laying floors and/or linings and their following quick pulling away in case of replacement, including a fixed sheath (1) and a removable sheath (2) able to fit each other by their frets, wherein removable sheath is provided with elements suitably disposed along the joint surfaces between the sheaths and able to form rooms close to the joint surfaces which are prevented fro...

A domestic oven comprises heating means, a gas sensor connected to a central processing and control unit and a user interface connected to the central processing unit by means of which the user can set the type of food placed in the oven compartment The user interface comprises means for setting the desired degree of cooking of the food and is capable of processing the signal of the gas sensor in ...