Abstract: A method and apparatus for a horticultural light fixture that utilizes a metallic extrusion with multiple heat pipes to distribute heat to multiple heat sink fins. The heat sink fins utilize a geometrical shape that facilitates increased air flow into an interior of the horticultural light without the use of forced air.

Abstract: Slide closure for a vessel that operatively contains molten metal, comprising: a slide housing including a recess receiving a first refractory closure plate; a slide unit including an opening receiving a second refractory closure plate; wherein at least one clamping mechanism is arranged to start the clamping of the corresponding refractory closure plate via an actuation of the at least one clamping mechanism when the slide unit is displaced relative to the slide housing and the first and the second refractory closure plates are distant apart from each other, essentially before the first and the second faces of the respective first and the second refractory closure plates are in contact under pressure.

Abstract: Slide closure for a vessel that operatively contains molten metal, comprising: a slide housing including a recess receiving a first refractory closure plate; a slide unit including an opening receiving a second refractory closure plate; wherein at least one clamping mechanism is arranged to start the clamping of the corresponding refractory closure plate via an actuation of the at least one clamping mechanism when the slide unit is displaced relative to the slide housing and the first and the second refractory closure plates are distant apart from each other, essentially before the first and the second faces of the respective first and the second refractory closure plates are in contact under pressure.

Abstract: A multi-featured control system which improves the manufacturing capability of the thin-film semiconductor growth process. This system improves repeatability and accuracy of the process, reduces the manpower requirements to operate MBE, and improves the MBE environment for scientific investigation. This system has three levels of feedback control. The first level improves the precision and tracking of the process variables, flux, and substrate temperature. The second level comprises an expert system that uses sensors to monitor the status of the product in order to tailor the process plan in real time so that the exact qualities desired are achieved. The third level features a continuously evolving neural network model of the process which is used to recommend the recipe and command inputs to achieve a desired goal. The third level is particularly useful during the development process for new materials.

Abstract: Water present in a hot gaseous product stream from a reactor system A,B (FIG. 1 ) containing hydrogen fluoride is separated from the stream in order to eliminate a potentially corrosive combination of water and HF. The water is removed by contacting the gaseous product stream with liquid HF in a distillation column so as to obtain a bottoms product containing liquid HF and water and a top product containing dry HF and the product to be recovered. The invention encompasses the separation process, a vessel for carrying out the process (FIGS. 2 to 4), a control system for the liquid HF supply to the distillation column (FIGS. 5 and 6) and a recovery system for recovering HF employed during operation of the reactor system in different regimes employing HF as a fluorination agent, as a diluent during catalyst regeneration and/or catalyst prefluorination (FIG. 7 ).

Abstract: A product stream containing, inter alia, HCl, HF and fluorocarbons which form close boiling point azeotropes with HF is subjected to distillation using sidestream rectification in order to effect energy efficient separation of selected fluorocarbon/HF azeotropes from one another.