Abstract: A method of controlling a plasma in a nuclear fusion reactor. The nuclear fusion reactor comprises sensors and plasma control inputs. An initial control model is provided, relating readings of at least a subset of the sensors to control of the plasma control inputs. A control loop is performed, comprising: operating the plasma control inputs in dependence upon the sensors according to the control model; determining correlations between readings of each of the sensors, and/or between readings of the sensors and states of the plasma control inputs; and adjusting the control model based on the determined correlations.

Abstract: A method of controlling a plasma in a nuclear fusion reactor. The nuclear fusion reactor comprises sensors and plasma control inputs. An initial control model is provided, relating readings of at least a subset of the sensors to control of the plasma control inputs. A control loop is performed, comprising: operating the plasma control inputs in dependence upon the sensors according to the control model; determining correlations between readings of each of the sensors, and/or between readings of the sensors and states of the plasma control inputs; and adjusting the control model based on the determined correlations.

Abstract: A method of controlling a plasma in a nuclear fusion reactor. The nuclear fusion reactor comprises sensors and plasma control inputs. An initial control model is provided, relating readings of at least a subset of the sensors to control of the plasma control inputs. A control loop is performed, comprising: operating the plasma control inputs in dependence upon the sensors according to the control model; determining correlations between readings of each of the sensors, and/or between readings of the sensors and states of the plasma control inputs; and adjusting the control model based on the determined correlations.

Abstract: A tokamak comprising a vacuum chamber, a toroidal field coil, and a solenoid. The solenoid is wound around the toroidal field coil within a central column region of the tokamak. The solenoid comprises an inner portion and two outer portions. The inner portion comprises windings extending axially for a first distance either side of the midpoint of the length of the solenoid. The outer portions, each comprise windings extending axially from an end of the inner portion. The inner portion has a number of turns per unit length which is greater than a number of turns per unit length of the outer portion.

Abstract: A tokamak plasma vessel. The tokamak plasma vessel comprises a toroidal plasma chamber, a plurality of poloidal field coils, an upper divertor assembly, and a lower divertor assembly. The plurality of poloidal field coils are configured to provide a poloidal magnetic field having a substantially symmetric plasma core and an upper and lower null, such that ions in a scrape off layer outside the plasma core are directed by the magnetic field past one of the upper and lower nulls to divertor surfaces of the respective upper and lower divertor assembly. Each of the upper and lower divertor assembly comprises a liquid metal inlet and a liquid metal outlet located below the liquid metal inlet. Each of the upper and lower divertor assembly is configured such that in use liquid metal flows from the liquid metal inlet to the liquid metal outlet over at least one divertor surface of the divertor assembly.

Abstract: A poloidal field coil assembly for use in a tokamak. The poloidal field coil assembly comprises inner and outer poloidal field coils and a controller. The inner poloidal field coil is configured for installation inside a toroidal field coil of the tokamak. The outer poloidal field coil is configured for installation outside the toroidal field coil. The controller is configured to cause current to be supplied to the inner and outer poloidal field coils such that the combined magnetic field produced by the inner and outer poloidal field coils has a null at the toroidal field coil.

Abstract: A tokamak plasma vessel. The tokamak plasma vessel comprises a toroidal plasma chamber, a plurality of poloidal field coils, an upper divertor assembly, and a lower divertor assembly. The plurality of poloidal field coils are configured to provide a poloidal magnetic field having a substantially symmetric plasma core and an upper and lower null, such that ions in a scrape off lay outside the plasma core are directed by the magnetic field past one of the upper and lower nulls to divertor surfaces of the respective upper and lower divertor assembly. Each of the upper and lower divertor assembly comprises a liquid metal inlet and a liquid metal outlet located below the liquid metal inlet. Each of the upper and lower divertor assembly is configured such that in use liquid metal flows from the liquid metal inlet to the liquid metal outlet over at least one divertor surface of the divertor assembly.

Abstract: A tokamak plasma vessel. The tokamak plasma vessel comprises a toroidal plasma chamber, a plurality of poloidal field coils, an upper divertor assembly, and a lower divertor assembly. The plurality of poloidal field coils are configured to provide a poloidal magnetic field having a substantially symmetric plasma core and an upper and lower null, such that ions in a scrape off lay outside the plasma core are directed by the magnetic field past one of the upper and lower nulls to divertor surfaces of the respective upper and lower divertor assembly. Each of the upper and lower divertor assembly comprises a liquid metal inlet and a liquid metal outlet located below the liquid metal inlet. Each of the upper and lower divertor assembly is configured such that in use liquid metal flows from the liquid metal inlet to the liquid metal outlet over at least one divertor surface of the divertor assembly.

Abstract: A poloidal field coil assembly for use in a tokamak. The poloidal field coil assembly comprises inner and outer poloidal field coils and a controller. The inner poloidal field coil is configured for installation inside a toroidal field coil of the tokamak. The outer poloidal field coil is configured for installation outside the toroidal field coil. The controller is configured to cause current to be supplied to the inner and outer poloidal field coils such that the combined magnetic field produced by the inner and outer poloidal field coils has a null at the toroidal field coil.

Abstract: A method of administering a computing system, including a plurality of computing devices. The method includes selecting an application for download to a computing device, prior to downloading the application, decompiling the application, searching for string patterns in the decompiled application, replacing the string patterns in the decompiled application with another string pattern, the another string pattern being configured to intercept at least one of a system event or an Application Programming Interface (API) call, and associating logic with the application. The logic is configured to interact with the application via the at least one system event or API call, the logic is configured to provide additional functions to the application, the logic is configured to be shared between the application and at least one other application, and the logic is stored separate from the application.

Abstract: A method of controlling a plasma in a nuclear fusion reactor. The nuclear fusion reactor comprises sensors and plasma control inputs. An initial control model is provided, relating readings of at least a subset of the sensors to control of the plasma control inputs. A control loop is performed, comprising: operating the plasma control inputs in dependence upon the sensors according to the control model; determining correlations between readings of each of the sensors, and/or between readings of the sensors and states of the plasma control inputs; and adjusting the control model based on the determined correlations.

Abstract: A method of administering a computing system, including a plurality of computing devices. The method includes selecting an application for download to a computing device, prior to downloading the application, decompiling the application, searching for string patterns in the decompiled application, replacing the string patterns in the decompiled application with another string pattern, the another string pattern being configured to intercept at least one of a system event or an Application Programming Interface (API) call, and associating logic with the application. The logic is configured to interact with the application via the at least one system event or API call, the logic is configured to provide additional functions to the application, the logic is configured to be shared between the application and at least one other application, and the logic is stored separate from the application.

Abstract: A method of administering a computing system, including a plurality of computing devices. The method includes selecting an application for inclusion in a menu of applications downloadable to a computing device and interposing a wrapper on the application before the computing device downloads the application, the wrapper being configured to control an operation of the application. Interposing the wrapper on the application includes decompiling the application, searching for string patterns, and replacing the string patterns with another string pattern, the another string pattern being configured to intercept at least one of a system event or an Application Programming Interface (API) call and associating logic with the application. The logic is configured to interact with the application via the at least one system event or API call, the logic is configured to provide additional functions to the application, and the logic is stored separate from the application.

Abstract: A method of administering a computing system, including a plurality of computing devices. The method includes selecting an application for inclusion in a menu of applications downloadable to a computing device and interposing a wrapper on the application before the computing device downloads the application, the wrapper being configured to control an operation of the application. Interposing the wrapper on the application includes decompiling the application, searching for string patterns, and replacing the string patterns with another string pattern, the another string pattern being configured to intercept at least one of a system event or an Application Programming Interface (API) call and associating logic with the application. The logic is configured to interact with the application via the at least one system event or API call, the logic is configured to provide additional functions to the application, and the logic is stored separate from the application.

Abstract: The method administers an enterprise computing system that includes a plurality of user mobile computing devices. The method includes selecting a pre-written application for inclusion in a menu of enterprise applications downloadable to a user computing device, allowing the user computing device to download the pre-written application, and interposing an application wrapper on the pre-written application before allowing the user computing device to download the pre-written application, the application wrapper being configured to control an operation of the pre-written application.

Abstract: The method administers an enterprise computing system that includes a plurality of user mobile computing devices. The method includes selecting a pre-written application for inclusion in a menu of enterprise applications downloadable to a user computing device, allowing the user computing device to download the pre-written application, and interposing an application wrapper on the pre-written application before allowing the user computing device to download the pre-written application, the application wrapper being configured to control an operation of the pre-written application.

Abstract: A plug member (10) for retaining grout in a cable bolt hole or a rockbolt hole or inside a rockbolt in underground excavations, comprising a cylindrical cap portion (20) with a means to wedge (26) the cap portion in the hole. The means to wedging means (26) may comprise a plurality of inclined flaps, a continuous resilient skirt, or a tapered bung. The cap portion (20) is provided with at least one port (50) to receive a grout delivery hose. The or each port (50) is comprised of a plurality of flexible flaps (56) moveable between an open position and a closed position. In the closed position the flaps (56) inter-engage to substantially close the port (50) and prevent grout leakage from the hole.

Abstract: The present invention relates to a method for treating a surface of zinc or of an alloy of zinc and aluminum, said method comprising the step of treating said surface with an aqueous solution having a pH of below 3 and comprising a complex formed from at least one species of metal oxo ion in conjunction with at least one species of hetero ion, the metal oxo ion being selected from the group consisting of molybdate, tungstate and vanadate; the hetero ion being selected from the group consisting of phosphorus (V), aluminium (III), silicon (IV), manganese (II), manganese (IV), zirconium (IV), titanium (IV), tin (IV), cerium (III) and nickel (II); and with a film forming acid tolerant resin compatible with the selected ions.

Abstract: The present invention relates to a surface treating dispersion for treating a surface of zinc or of an alloy of zinc and aluminum, the surface treating dispersion comprising an aqueous solution having a pH of below 3 and a complex formed from at least one species of metal oxo ion in conjunction with at least one species of hetero ion, the metal oxo ion being selected from the group consisting of molybdate, tungstate and vanadate, the hetero ion being selected from the group consisting of phosphorus (V), aluminum (III), silicon (IV), manganese (II), manganese (IV), zirconium (IV), titanium (IV), tin (IV), cerium (III) and nickel (II); and with a film forming acid tolerant resin compatible with the selected ions.