Abstract: Techniques and systems for computer aided design of physical structures using an object splitting design process that optimize manufacturing efficiency are described. A described technique includes splitting, by a computer program, a three dimensional model of an initial object into an up skin region and a down skin region based on an analysis of draft angles along at least one surface of the three dimensional model of the initial object. The technique further includes producing, by the computer program, first and second three dimensional models of respective first and second objects in accordance with the up skin region and the down skin region to create separate first and second physical structures using one or more computer-controlled manufacturing systems such that the first and second physical structures are combinable to form a combined physical structure.

Abstract: The present invention provides a process for the preparation of ethene by vapor phase chemical dehydration of a feed comprising ethanol, said process comprising contacting the feed with a supported heteropolyacid catalyst in a reactor, wherein the feed temperature is at least 250° C. and the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa.

Abstract: A process for the acid-catalyzed dehydration of ethanol, the process comprising the steps of distilling an ethanol feedstock (101) comprising at least one nitrogen-containing contaminant to form an overhead stream (102) and a bottom stream comprising ethanol (103), wherein the distillation has a reflux ratio of at least 20:1; and reacting the bottom stream in the presence of an acid catalyst to form a product stream comprising ethylene.

Abstract: The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of a feed comprising ethanol, said process comprising contacting the feed with a supported heteropolyacid catalyst in a reactor, wherein the feed temperature is at least 250° C. and the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa.

Abstract: A process for the acid-catalysed dehydration of ethanol, the process comprising the steps of distilling an ethanol feedstock (101) comprising at least one nitrogen-containing contaminant to form an overhead stream (102) and a bottom stream comprising ethanol (103), wherein the distillation has a reflux ratio of at least 20:1; and reacting the bottom stream in the presence of an acid catalyst to form a product stream comprising ethylene.

Abstract: A web-based graphics development system for developing a graphics application and a method of debugging a graphics application. One embodiment of the graphics development system includes: (1) a web server application configured to host at least one graphics library and linkable to the graphics application, and (2) a client configured to gain access to and interact with the graphics application through a web browser application couplable to the web server application over a network.

Abstract: A processor for making porous silicon or processing other substrates has first and second chamber assemblies. The first and second chamber assemblies include first and second seals for sealing against a wafer, and first and second electrodes, respectively. The first and/or second seal is moveable towards and away from a wafer in the processor, to move between a wafer load/unload position, and a wafer process position. The first electrode may move along with the first seal, and the second electrode may move along with the second seal. A light source shines light onto the first side of the wafer. The processor may be pivotable from a substantially horizontal orientation, for loading and unloading a wafer, to a substantially vertical orientation, for processing a wafer.

Abstract: A processor for making porous silicon or processing other substrates has first and second chamber assemblies. The first and second chamber assemblies include first and second seals for sealing against a wafer, and first and second electrodes, respectively. The second seal is moveable towards and away from a wafer in the processor, to move between a wafer load/unload position, and a wafer process position. The second electrode may move with the second seal. A light source shines light onto the first side of the wafer. The processor may be pivotable from a substantially horizontal orientation, for loading and unloading a wafer, to a substantially vertical orientation, for processing a wafer.

Abstract: The present invention relates to a base oil composition comprising at least one or more hydrogenated polymethylated triterpenes of the general formula CnH(2n+2).

Abstract: A processor for making porous silicon or processing other substrates has first and second chamber assemblies. The first and second chamber assemblies include first and second seals for sealing against a wafer, and first and second electrodes, respectively. The second seal is moveable towards and away from a wafer in the processor, to move between a wafer load/unload position, and a wafer process position. The second electrode may move with the second seal. A light source shines light onto the first side of the wafer. The processor may be pivotable from a substantially horizontal orientation, for loading and unloading a wafer, to a substantially vertical orientation, for processing a wafer.

Abstract: A processor for making porous silicon or processing other substrates has first and second chamber assemblies. The first and second chamber assemblies include first and second seals for sealing against a wafer, and first and second electrodes, respectively. The first and/or second seal is moveable towards and away from a wafer in the processor, to move between a wafer load/unload position, and a wafer process position. The first electrode may move along with the first seal, and the second electrode may move along with the second seal. A light source shines light onto the first side of the wafer. The processor may be pivotable from a substantially horizontal orientation, for loading and unloading a wafer, to a substantially vertical orientation, for processing a wafer.

Abstract: An optical fiber connector element comprises a connector body (10) which receives an optical fiber (12). The connector body (10) is provided with a bayonet coupling (30) to enable two identical connector elements to be mated to connect optically the optical fibers. The bayonet coupling (30) has two diametrically opposed connection arms (50,52), the arms of one connector fitting in the spacing between the arms of another connector to enable a bayonet connection to be established. An alignment feature (60) is positioned such that when the alignment feature (60) of the one connector and of the other connector are aligned, the arms (50,52) of the one connector are inserted into the spaces (54) between the arms of the other connector with the correct relative positioning to enable the bayonet fitting to be established. This facilitates the assembly of the coupling, which may be required in darkness and in adverse weather conditions when gloves are required.

Abstract: An optical fibre connector element (10) receives at one end a sheathed optical fiber cable (12), and the individual optical fibers (14) are separated out within the connector element. Each of the individual optical fibers is terminated with a ferrule (16) at the cut end. The connector has an end face (20) which is provided with a transparent window (26), the ferrules (16) being positioned internally adjacent the window. The invention provides a single carrier component (60) for the window (26) and which includes an integral seal component (64). The end face is also provided with an O-ring seal (29) to provide a seal between two coupled connectors, and the O-ring seal (29) is housed frictionally in a channel (28) having tapered side walls (51,53). An improved ferrule carrier design is also disclosed in which a channel (54) is provided for each fiber having a guide ramp (60) which is arranged to direct the optical fiber radially out of the ferrule carrier during assembly so as to prevent damage to the fibers.

Abstract: A cylindrical plug connector is provided for terminating an electrical cable which includes at least first and second inner conductors surrounded by an outer insulating jacket. A generally cylindrical dielectric housing mounts at least an outer cylindrical conductive contact and an inner conductive contact. The inner conductive contact is terminated to one of the first and second inner conductors of the cable. A terminal has a body portion in engagement with the outer cylindrical conductive contact. The terminal includes a first crimp arm projecting from the body portion for crimping termination with the other of the first and second inner conductors of the cable, and a second crimp arm projecting from the body portion for crimping onto the outer insulating jacket of the cable.