WorldCat Identities

Bull, Alan R.

Works: 3 works in 4 publications in 1 language and 4 library holdings
Publication Timeline
Most widely held works by Alan R Bull
Recognition Memory for Pitch of Fixed and Roving Stimulus Tones( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

The method of delayed comparison was used to measure pitch memory under two conditions of presentation, either the same standard tone on every trial (fixed S) or one of four equally likely standard tones (roving S), six durations of interference interval ranging from 0.0 to 4.0 sec, and two types of interference interval, either blank or filled with a pure tone. Listeners were instructed not to rehearse the S tone during the interference interval. For both fixed-S and roving-S conditions, accuracy of performance, as measured by area under the ROC curve, declined as interval duration increased and declined more rapidly following an interference-filled than following a blank interval. In general, forgetting proceeded at a slower rate under fixed-S conditions than under roving-S conditions. A second experiment showed that very little forgetting is obtained over 4 sec for roving-S conditions if instructions permit rehersal of the S tone and suggests that the conclusions from the first experiment be restricted to nonrehersal instructional conditions. (Author)
A Standard Organization for Specifying Abstract Interfaces for the SMMS (Secure Military Message System) Application( Book )

1 edition published in 1989 in English and held by 1 WorldCat member library worldwide

One of the goals of NRL's Secure Military Message System (SMMS) project is to demonstrate the feasibility of applying advanced software engineering techniques to multi-level secure data base systems to provide increased assurance and to simplify maintenance. To demonstrate these principles, software for a multi-level secure, fully-functional military message system is being designed and implemented. The project is producing a set of model procedures and documents that can be followed by designers and producers of other such systems. this document describes the format to be followed in documenting abstract interfaces of the software modules. An abstract interface is a software module interface that will remain unchanged even when details of the software implementation change; specifying such interfaces is a key to building easy-to-change software systems. The format described in this report is designed to serve the author who designs a module, the coder who implements it, designers of other modules that must make use of it, and reviewers who must approve its design. The format is also intended to aid reviewers in assessing whether a module satisfies its abstract interface specification, thus meeting its security requirements. It organizes the specifications into a small number of concise, well-defined sections, allowing readers who are searching for a particular kind of information to know where to look. (RH)
A Taxonomy of Computer Program Security Flaws, with Examples( )

2 editions published between 1993 and 1994 in English and held by 0 WorldCat member libraries worldwide

An organized record of actual flaws can be useful to designers, implementors, and evaluators of computer systems. This paper provides a taxonomy for computer program security flaws together with an appendix that carefully documents 50 actual security flaws. These flaws have all been described previously in the open literature, but in widely separated places. For those new to the field of computer security, they provide a good introduction to the characteristics of security flaws and how they can arise. Because these flaws were not randomly selected from a valid statistical sample of such flaws, we make no strong claims concerning the likely distribution of actual security flaws within the taxonomy. However, this taxonomy can be used to organize and abstract more representative samples. Data organized this way could be used to focus efforts to remove security flaws and prevent their introduction
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