A system for continuously monitoring air for the presence of tritiated water vapor comprising: contacting a predetermined mass flow of an air sample with a predetermined flow of a liquid miscible with tritiated water to transfer any tritiated water vapor in the air sample to the liquid; stripping radioactive noble gases from the liquid with a stream of gas; and analyzing the liquid for beta radiation to determine the presence of tritium. In the preferred embodiment of the apparatus an air-liquid...

A method for recording uncoded ratings by multiple evaluators on a single automatic machine scannable document while maintaining independence of ratings and accuracy of results; the method comprising a machine scannable rating sheet and one or more rating shields corresponding to at least all but one of the rating areas to shield each area in succession to maintain independence of multiple uncoded ratings recorded on a single rating sheet whereby the recorded ratings are machine readable through...

An apparatus for training a user in contamination surveillance. The contamination may be from a nuclear, bacteriological or chemical explosion or leak, for example. The apparatus is portable and can be carried by the user to various points of an exercise area. The apparatus includes a data store and an interpolation device. The data store stores data which is derived from a mathematical model of an assumed source of contamination and which defines the contamination levels at various locations wi...

A multiprocessor system is described in which a plurality of central processor units share the same main memory over a common asynchronous bus. Each central processor directs all memory requests to its own high speed cache memory. If the request is to read data from memory, the cache memory control determines if the addressed data is present in the cache memory. If so, the data is transferred to the processor without accessing main memory over the bus. If the data is not present in the cache mem...

This invention relates to a system including an autopilot, with a simulator, for a fluid borne vehicle, and, in particular, to such a system including novel means to compute, in real time, and for depth keeping, and pitch keeping, purposes, any change of, or `out-of-trim`, heave force, and any change of, or `out-of-trim`, pitching moment, acting on the vehicle. For simplicity the general term out-of-trim forces is used when both are referred to.

A computerized aid to creativity and problem solving to help speed up the creative process using an interactive database comprised of two major parts, or functions. The first part is a database of several thousand questions for clarifying the task, modifying ideas, and evaluating goals, ideas, and outcomes. The second part is a database or more than 60,000 words and phrases expressing the shared concepts of a particular culture, namely American, and more than 650,000 idea associations-to which a...

A method of using a computer to provide display data representing a fire. The data is derived from fire model data, so that the fire is realistically displayed with the dynamics of a real fire. Particles are generated from the model data and given location values and other parameters. Each particle becomes a display data element by virtue of being assigned a graphics primitive. The data elements are culled according to a field of view and sorted, so that they may be used for real time display re...

A pump assembly for a controlled brake system diverts pressure fluid entrained by the pistons which collects in the space around the eccentric to prevent it from becoming pressurized by the moving pistons. A non-return valve inserted into an exit duct is dimensioned such that it opens when exposed to the pressure of the collected pressure fluid, and prevents the ingress of dirt and moisture in the opposite direction.

An answer recording and score sheet device includes a markable sheet arrangement with at least one surface that has answer mark guide indicia. The guide indicia define sets of first positions at which marks can be selectively made by a respondent in response to corresponding questions. The sheet arrangement also has a surface on which a number of discriminable flag indicia are formed in a determined relation with respect to the first positions. The flag indicia serve to convey correct responses ...

A method of constructing written educational tests at the local school district level from validated test questions linked to statements of specific learning objectives in a data base recorded on compact laser discs. A laser disc player operated by the educator who is formulating the test displays and edits the available questions in selected topics on a visual monitor. The questions which are displayed may be selected at the local level to reflect the actual content of the course which is being...