Abstract: A replacement for cylindrical dowel nuts is provided and is a hollow cylindrical nut with a threaded hole on top and an unthreaded hole at the bottom which is for the threaded shank to enter. This hollow dowel nut elastically compresses during tightening to act like a lock-washer to prevent loosening. Several solutions are provided to make the top of the nut thicker to fit more thread coils than what wall thickness would otherwise permit. To improve loosening prevention further and also provide overtightening prevention a hollow nut with flatter bottom and a narrow gap bisecting the lower hole are used which during tightening cause right and left edges of said gap to be pushed towards the bolt strongly gripping it which prevents overtightening and loosening. “C” shaped nuts also provided which cause misalignment and jamming in the thread when compressed thereby also preventing loosening and overtightening.

Abstract: In one embodiment of this invention the washers have been provided with the bottom teeth, which sink into the wood surface during nut tightening thus immobilizing the washer, and a turnable upward flap which when bent upward and pressing against the nut facet is preventing its loosening. In another similar embodiment the washer is provided with turnable upward bracket which has a tip entering the screw top's socket or slit, thereby immobilizing the screw and preventing its loosening. As a replacement for cylindrical nuts, a number of types of elongated nuts with open “C”-like cross-sections which elastically compress with their threaded hole becoming misaligned with the screw thereby jamming it. Said misalignment prevents overtightening and contributes to prevention of loosening, while the elastic compression of this nut acts in a way similar to a spring lock-washer preventing loosening.

Abstract: An improved alkylation process utilizing a solid-acid catalyst comprising a cerium rich rare earth containing zeolite and a hydrogenation metal is disclosed.

Abstract: The present invention involves a method of developing a model of groundwater flow with a well configuration. First, a geographic area is specified with one or more related wells. A mathematical model is created of the groundwater flow in relation to the wells with a plurality of layers, each layer having a local flow component and a leakage component. The plurality of layers is modified based on the leakage component of adjacent layers. The simulation of groundwater flow to a collector well, horizontal well, or gallery may thus be accomplished by specifying an array of line-sink elements that represent the lateral arms of the collector well, horizontal well, or gallery. Boundary conditions for groundwater flow to the lateral arms may then be specified. Groundwater flows are then calculated based on the array and boundary conditions, with updating of the boundary conditions during the calculation. Each of the layers may include a component related to frictional head loss.

Abstract: The invention relates to an electrical device comprising a substrate carrying at least one component comprising at least one electrode, a first connecting line electrically connected to said electrode, wherein the first connecting line bridges a second connecting line by means of a crossover. The crossover is, at least at one side, bounded by an electrically insulating structure. The invention allows new testing methods and efficient lead-outs for an electrical device, such as electroluminescent display devices.

Abstract: The invention relates to an electrical device comprising a substrate carrying at least one component comprising at least one electrode, a first connecting line electrically connected to said electrode, wherein the first connecting line bridges a second connecting line by means of a crossover. The crossover is, at least at one side, bounded by an electrically insulating structure. The invention allows new testing methods and efficient lead-outs for an electrical device, such as electroluminescent display devices.

Abstract: The present invention involves a method of developing a model of groundwater flow with a well configuration. First, a geographic area is specified with one or more related wells. A mathematical model is created of the groundwater flow in relation to the wells with a plurality of layers, each layer having a local flow component and a leakage component. The plurality of layers is modified based on the leakage component of adjacent layers. The simulation of groundwater flow to a collector well, horizontal well, or gallery may thus be accomplished by specifying an array of line-sink elements that represent the lateral arms of the collector well, horizontal well, or gallery. Boundary conditions for groundwater flow to the lateral arms may then be specified. Groundwater flows are then calculated based on the array and boundary conditions, with updating of the boundary conditions during the calculation. Each of the layers may include a component related to frictional head loss.

Abstract: A cleaning apparatus for a radiation source assembly in a fluid treatment system is described. The cleaning apparatus comprises: a carriage movable with respect to an exterior of the radiation source assembly; at least one cleaning sleeve in sliding engagement with the exterior of the radiation source assembly, the at least one cleaning sleeve being moveable with respect to the carriage; and drive means coupled to the carriage to translate the carriage whereby the at least one cleaning sleeve is translated over the exterior of the radiation source assembly. A radiation source module comprising the cleaning apparatus is also disclosed. The radiation source module is particularly useful for ultraviolet radiation of wastewater while having the advantages of in situ cleaning of the radiation source when it becomes fouled. Radiation source replacement is also facilitated.