The Dual-Use and Related Goods (Export Control) Regulations 1995

“Splat Quenching” (1) means a process to “solidify rapidly” a molten metal stream impinging upon a chilled block, forming a flake-like product.

• N.B.: “Solidify rapidly”: solidification of molten material at cooling rates exceeding 1,000 K/sec.

156

“Spread spectrum” (5) means the technique whereby energy in a relatively narrow-band communication channel is spread over a much wider energy spectrum.

157

“Sputtering” (4) means an overlay coating process wherein positively charged ions are accelerated by an electric field towards the surface of a target (coating material). The kinetic energy of the impacting ions is sufficient to cause target surface atoms to be released and deposited on the substrate.

• N.B.: Triode, magnetron or radio frequency sputtering to increase adhesion of coating and rate of deposition are ordinary modifications of the process.

158

“Stability” (7) means the standard deviation (1 sigma) of the variation of a particular parameter from its calibrated value measured under stable temperature conditions. This can be expressed as a function of time.

159

“Stored programme controlled” (2 3 5) means controlled by using instructions stored in an electronic storage which a processor can execute in order to direct the performance of predetermined functions.

• N.B.: Equipment may be “stored programme controlled” whether the electronic storage is internal or external to the equipment.

160

“Substrate” (3) means a sheet of base material with or without an interconnection pattern and on which or within which “discrete components” or integrated circuits or both can be located.

• N.B.: “Discrete component”: a separately packaged “circuit element” with its own external connections.

161

“Substrate blanks” (6) means monolithic compounds with dimensions suitable for the production of optical elements such as mirrors or optical windows.

162

“Superalloys” (2 9) means Nickel-, cobalt- or iron-base alloys having strengths superior to any alloys in the AISI 300 series at temperatures over 922 K (649°C) under severe environmental and operating conditions.

163

“Superconductive” (1 3 6 8) means materials, i.e., metals, alloys or compounds, which can lose all electrical resistance, i.e., which can attain infinite electrical conductivity and carry very large electrical currents without Joule heating.

• N.B.: The “superconductive” state of a material is individually characterised by a “critical temperature”, a critical magnetic field, which is a function of temperature, and a critical current density which is, however, a function of both magnetic field and temperature.

164

“Super High Power Laser” (SHPL) (6) means a “laser” capable of delivering (the total or any portion of) the output energy exceeding 1 kJ within 50 ms or having an average or CW power exceeding 20 kW.

165

“Superplastic forming” (1 2) means a deformation process using heat for metals that are normally characterised by low values of elongation (less than 20%) at the breaking point as determined at room temperature by conventional tensile strength testing, in order to achieve elongations during processing which are at least 2 times those values.

166

“Swept frequency network analysers” (3) means analysers which involve the automatic measurement of equivalent circuit parameters over a range of frequencies, involving swept frequency measurement techniques but not continuous wave point-to-point measurements.

167

“Switch fabric” (5) is that hardware and associated “software” which provides the physical or virtual connection path for in-transit message traffic being switched.

168

“Synchronous digital hierarchy” (SDH) (5) means a digital hierarchy providing a means to manage, multiplex and access various forms of digital traffic using a synchronous transmission format on different types of media. The format is based on the Synchronous Transport Module (STM) which is defined by CCITT Recommendation G.703, G.707, G.708, G.709 and others yet to be published. The first level rate of “SDH” is 155.52 Mbit/s.

169

“Synchronous optical network” (SONET) (5) means a network providing a means to manage, multiplex and access various forms of digital traffic using a synchronous transmission format on fibre optics. The format is the North America version of “SDH” and also uses the Synchronous Transport Module (STM). However, it uses the Synchronous Transport Signal (STS) as the basic transport module with a first level rate of 51.81 Mbit/s. The SONET standards are being integrated into those of “SDH”.

170

“Systems tracks” (6) means processed, correlated (fusion of radar target data to flight plan position) and updated aircraft flight position report available to the Air Traffic Control centre controllers.

171

“Systolic array computer” (4) means a computer where the flow and modification of the data is dynamically controllable at the logic gate level by the user.

172

“Technical assistance” (GTN NTN) may take forms such as instructions, skills, training, working knowledge and consulting services and may involve the transfer of “technical data”.

173

“Technical data” (GTN NTN) may take forms such as blueprints, plans, diagrams, models, formulae, tables, engineering designs and specifications, manuals and instructions written or recorded on other media or devices such as disk, tape, read-only memories.

174

“Technology” (GTN NTN All) means specific information necessary for the “development”, “production” or “use” of goods. This information takes the form of “technical data” or “technical assistance”.

175

“Terminal interface equipment” (4) means equipment at which information enters or leaves the telecommunication system, e.g., telephone, data device, computer, facsimile device.

176

“Tilting spindle” (2) means a tool-holding spindle which alters, during the machining process, the angular position of its centre line with respect to any other axis.

177

“Time constant” (6) is the time taken from the application of a light stimulus for the current increment to reach a value of 1-1/e times the final value (i.e., 63% of the final value).

188

“Toxins” (1 2) means toxins in the form of deliberately isolated preparations or mixtures, no matter how produced, other than toxins present as contaminants of other materials such as pathological specimens, crops, foodstuffs or seed stocks of “microorganisms”.

178

“Total digital transfer rate” (5) means the number of bits, including line coding, overhead and so forth per unit time passing between corresponding equipment in a digital transmission system.

• N.B.: See also “digital transfer rate”.

179

“Transfer laser” (6) means a “laser” in which the lasing species is excited through the transfer of energy by collision of a non-lasing atom or molecule with a lasing atom or molecule species.

180

“Tunable” (6) means the ability of a “laser” to produce a continuous output at all wavelengths over a range of several “laser” transitions. A line selectable “laser” produces discrete wavelengths within one “laser” transition and is not considered “tunable”.

181

“Uranium enriched in the isotopes 235 or 233” (0) means uranium containing the isotopes 235 or 233, or both, in an amount such that the abundance ratio of the sum of these isotopes to the isotope 238 is more than the ratio of the isotope 235 to the isotope 238 occurring in nature (isotopic ratio 0.72 per cent);

182

“Use” (GTN NTN All) means Operation, installation (including on-site installation), maintenance (checking), repair, overhaul and refurbishing.

183

“User-accessible programmability” (5 6) means the facility allowing a user to insert, modify or replace “programmes” by means other than:

• (a) A physical change in wiring or interconnections; or

• (b) The setting of function controls including entry of parameters.

184

“Vacuum Atomisation” (1) means a process to reduce a molten stream of metal to droplets of a diameter of 500 micrometre or less by the rapid evolution of a dissolved gas upon exposure to a vacuum.

185

“Variable geometry airfoils” (7) means the use of trailing edge flaps or tabs, or leading edge slats or pivoted nose droop, the position of which can be controlled in flight.