Abstract: A system and method for cleaning of heat exchanger tubes including an assembly, an indexer, and a communication device provided with specialized software and programming. The indexer includes orthogonally arranged first and second arms. A trolley and sensors are provided on the indexer arms. One or more lances are provided on the trolley to deliver water jets into the openings. Sensors measure displacement as the trolley is moved relative to the heat exchanger's face plate. An operator controls the system from a distance away using the communication device. During setup, the pattern of the face plate is learned and mapped utilizing information from the sensors as one of the inputs. This information is utilized to help navigate the face plate during a subsequent cleaning operation. A kit for retrofitting existing X-Y indexers is also disclosed.

Abstract: A system and method for determining service requirements of elements in a network. A collection program is used to gather performance data from an element for which a service requirement is desirable by an entity. The performance data is stored in a database. The performance data is then retrieved by a microprocessor. The microprocessor processes the performance data to calculate a network health indicator associated with the performance data. Using the network health indicator, a service requirement of the associated element can be determined. When at least two network health indicators or service requirements of different elements are compared, service priorities among the elements can be established.

Abstract: A method of remediation of petroleum hydrocarbons on water which includes contacting the petroleum hydrocarbons with a source of natural beeswax which over a predetermined time period results in the remediation of the hydrocarbons through the action of indigenous microorganisms contained in the water. A floating porous device which contains the beeswax may be employed, with the beeswax being in the form of hollow shells.

Abstract: A liquid drain opener formulation which comprises a stable suspension of viable microorganisms, a surfactant, and a preservative all contained in an aqueous medium and having a pH in the range of about 3 to 10.

Abstract: A polymer is disclosed which is represented by the formula ##STR1## wherein: Y is hydrogen, ammonium, an alkali metal or an alkaline earth metal; R.sup.1 and R.sup.2 are independently hydrogen, hydroxyl, amino, nitro, sulfo, phospho, carboxy, carboxyamido groups or hydrocarbon groups of 1 to about 20 carbon atoms; R.sup.3 is hydrogen or a hydrocarbon group of from 1 to about 12 carbon atoms; R.sup.4 and R.sup.5 are independently hydrogen or alkyl groups of 1 to about 3 carbon atoms; m is a number sufficient to provide the acid or salt portion of said polymer at a level of from zero to about 90% by weight of the total weight of said polymer; n is a number sufficient to provide the amide portion of said polymer at a level of from about 10% to about 99.5% by weight of the total weight of said polymer; p is a number sufficient to provide the maleimide portion of said polymer at a level of at least about 0.

Abstract: A polymer is disclosed which is represented by the formula ##STR1## wherein: Y is hydrogen, ammonium, an alkali metal or an alkaline earth metal; R.sup.1 and R.sup.3 are independently hydrogen or alkyl groups of 1 to about 3 carbon atoms; R.sup.2 is hydrogen or an alkyl group of 2 to about 3 carbon atoms, and R.sup.4 is hydrogen or an alkyl group of 1 to about 3 carbon atoms, with the proviso that R.sup.2 is not the same as R.sup.4 and either R.sup.2 or R.sup.4 is hydrogen; m is a number sufficient to provide the acid or salt portion of said polymer at a level of from about 10% to about 90% by weight of the total weight of said polymer; n is a number sufficient to provide the amide portion of said polymer at a level of from about 10% to about 90% by weight of the total weight of said polymer; and x is a number sufficient to provide said polymer with a molecular weight of at least about 100,000.