Microprocessors: The microprocessor industry shifts from hardware as the driving force in chip design to software, with the widespread acceptance of the UNIX operating system

IEEE Spectrum ◽  
1984 ◽  
Vol 21 (1) ◽  
pp. 50-52 ◽  
Author(s):  
Fred Guterl
Keyword(s):  
Operating System ◽  
Driving Force ◽  
Chip Design ◽  
Unix Operating System ◽  
Widespread Acceptance ◽  
Microprocessor Industry

Empirical User Modeling: Command Usage Analyses for Deriving Models of Users

1987 ◽  
Vol 31 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Matthew P. Anderson ◽  
James E. McDonald ◽  
Roger W. Schvaneveldt
Keyword(s):  
Operating System ◽  
User Modeling ◽  
Procedural Knowledge ◽  
Structural Models ◽  
Network Representation ◽  
User Behaviors ◽  
Unix Operating System ◽  
Usage Patterns ◽  
Unix Command ◽  
Pathfinder Network

Models of users' procedural knowledge were derived from the records of command usage obtained from nine experienced users of the Unix operating system. Pairwise transitions between user command entries were analyzed for the purpose of identifying salient command patterns associated with task-based user behaviors. Structural models of command usage patterns were obtained from Pathfinder network scaling of Unix command events. The network representation of command patterns was evaluated as a method for abstracting users' procedural knowledge. These network scaling solutions revealed patterns that were common both within and across users' command usage.

The UNIX Operating System: A Model for Software Design

Science ◽  
1982 ◽  
Vol 215 (4534) ◽  
pp. 779-783 ◽  
Author(s):  
B. W. Kernighan ◽  
S. P. Morgan
Keyword(s):  
Operating System ◽  
Software Design ◽  
System A ◽  
Unix Operating System

CRYPTOGRAPHIC FEATURES OF THE UNIX OPERATING SYSTEM

Cryptologia ◽  
1982 ◽  
Vol 6 (3) ◽  
pp. 253-257
Author(s):  
RICHARD OUTERBRIDGE
Keyword(s):  
Operating System ◽  
Unix Operating System

Writing Styles of Abstracts in Occupational Therapy Journals

1985 ◽  
Vol 48 (8) ◽  
pp. 244-246 ◽  
Author(s):  
Ashok Chandani
Keyword(s):  
Operating System ◽  
British Journal ◽  
Occupational Therapy ◽  
Canadian Journal ◽  
Correlation Matrix ◽  
Pearson Correlation ◽  
Negative Relationship ◽  
Formula One ◽  
Unix Operating System ◽  
Pearson Correlation Matrix

The readability grades of abstracts randomly selected from the American Journal of Occupational Therapy, the Australian Occupational Therapy Journal, the British Journal of Occupational Therapy, and the Canadian Journal of Occupational Therapy were studied through the program Style of the Unix operating system (computer). The formulae for readability grades used were the Kincaid formula, the automated readability index, the Coleman-Liau formula, and the Flesch formula. One-way analysis of variance was found to be significant (p<0.05) between the British and Australian journals in all four formulae. Based on samples of abstracts, the results indicated that the British journal is the easiest and the Australian journal is the most difficult to read of all four journals. A Pearson correlation matrix revealed a significant positive and negative relationship between some of the 12 variables in each journal.

X-ray Diffraction Measurements via a UNIX+ Based System

1984 ◽  
Vol 28 ◽  
pp. 241-247
Author(s):  
D. S. Dunn ◽  
T. F. Marinis
Keyword(s):  
Operating System ◽  
Data Acquisition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Software Interface ◽  
System A ◽  
Unix Operating System ◽  
Processing And Storage ◽  
Data Acquisition Program ◽  
And Storage

We have automated a Seeman-Bohlin Guinier x-ray diffractometer by interfacing it to a minimally configured PDP 11/23 computer. The programs that run on the microcomputer to control the operation of the diffractometer are stored on a mainframe host running the UNIX+ operating system. A software interface allows a particular data acquisition program to be downloaded from the UNIX host and executed on the satellite processor. This same interface allows the collected data to be periodically off-loaded to the host for processing and storage.

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