The present invention provides methods of cementing pipe in well bores and l ow density cement compositions having enhanced compressive, tensile and bond strengths upon setting. The composition of the invention are basically comprised of a hydraulic cement, sufficient water to form a slurry and hollow glass microspheres surface treated with a mixtur e of organosilane coupling agents present in an ...

An apparatus and method are described that allows for improved wander jitt er reduction in communication devices and associated communication links, in particular on HDSL communication devices and links. The improved device apparatus and meth od detects the current data rate offset of the HDSL data rate being utilized an d the data rate of the datastream being transmitted through the HDSL communic...

The invention relates to filtering of telecommunica­tion in the network, in which the devices connected to the network have device-specific filtering rules. A firewall component (FW) is arranged in the telecommu­nication network in such a manner that all the tele­communication goes through the firewall component (FW). The firewall component (FW) is connected to a database server (DB), to which the...

A method of manufacturing a crank shaft for a hermetic reciprocating compressor comprises the steps of forming the main shaft portion and a weight balancing member eccentric with respect to the main shaft portion, forming the weight balancing member positioned adjacent an end of the main shaft portion and between the weight balancing member and the crank portion of the crank shaft member, assembli...

A method and an arrangement for controlling the drive unit of a vehicle make possible the jolt-free enablement of a rapid actuating path ( 5 ) for the conversion of a desired value for an output quantity of the drive unit. The desired value for the output quantity of the drive unit is pregiven. Depending upon the operating state of the drive unit, an actual value for the output quantity is caused ...

-10- A duct to receive duct wrap is provided with a plurality of posts at different locations on and upstanding from the post to protrude through the duct wrap. Wrap retainers fit onto the post over the duct wrap securing the duct wrap on the duct.