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  • Expert systems for exploratory data analysis : towards automated research

    Creator:
    Springsteel, Fred Neil
    Abstract:
    Exploratory Data Analysis (EDA) is a lesser known field which has outgrown the bounds of statistics. It differs from ordinary, or “confirmatory”, data analysis. Originated by John Tukey, EDA aspires toward an open-ended meta-goal: to discover “all interesting” [nontrivial, normal form, valid] hypo­theses about a domain that is represented by...
    Resource Type:
    Technical Report
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    ] deserves special atten~ion, because it is a direct application of EMYCIN's naked inference engine to a

  • Computer science and computer engineering research equipment

    Creator:
    Tonge, Fred M.
    Abstract:
    This grant supported acquisition of a minicomputer system for departmental research. The equipment selected is a DEC VAX-11/750 system, installed in remodeled space in the Computer Science (formerly Farm Crops) Building. Grant funds for equipment acquisition were supplemented by support from the Tektronix Foundation. After completion of the physical facilities...
    Resource Type:
    Technical Report
    Full Text:
    , Oregon 97331 CORVALLIS, Url~UEAS~T'r 5C~ErlCE FINAL TECHNICAL REPORT DEPARTMC\1-' ,OMPUTER

  • Position estimation

    Creator:
    McKenney, Paul E.
    Abstract:
    Acoustic position estimation is used where high accuracy navigation is required over a small area, such as for searching or for collecting gravitational or geomagnetic data. In this position estimation method, a surface ship or submersible periodically sends out a high-frequency acoustic 'ping' at a prearranged frequency. This ping is...
    Resource Type:
    Technical Report
    Full Text:
    shows how this can be done. First, the ship sends out a ping at a special frequency (ray 1). This is

  • Typographic style is more than cosmetic

    Creator:
    Oman, Paul W. and Cook, Curtis R.
    Abstract:
    There is disagreement about the role and importance of typographic style (source code formatting and commenting) in program comprehension. Results from experiments and opinions in programming style books are mixed. This paper presents principles of typographic style consistent and compatible with the results of program comprehension studies. It introduces the...
    Resource Type:
    Technical Report
    Full Text:
    , identifier naming conventions, and conventions for special case, font or type styles. Micro-typographic

  • Preliminary X2 language reference manual

    Creator:
    Sandberg, David
    Abstract:
    X2 is an object-oriented programming language. Object-oriented programming models everything in the world as objects that have some local state that may vary with time. If the state of an object varies with time the object is mutable. If the state is time independent the object is immutable. Each object's...
    Resource Type:
    Technical Report
    Full Text:
    Special class. call callproc Procedure that calls a procedure. The last argument is the procedure to be

  • Biomedical knowledge acquisition : three systems reviewed

    Creator:
    Springsteel, Frederick Neil
    Abstract:
    Recent advances in diagnostic expert systems have been limited by the crucial Knowledge Acquisition Problem: to bring expert heuristics into logical, condi­tional rule forms useful for computer aided diagnosis. Some automatic systems with potential biomedical relevance that do acquire knowledge are reviewed here, and analyzed from the standpoint of possible...
    Resource Type:
    Technical Report
    Full Text:
    - neered one, in that special domain [PLANT/ds, below]. RX produced a powerful model for feed- back

  • Preliminary results of an experimental study of the mechanical design process

    Creator:
    Ullman, David G., Stauffer, Larry A., and Dietterich, Thomas G.
    Abstract:
    This paper presents the initial results from an empirical study of me­chanical design engineers. In this study, six engineers were video-taped solving real mechanical design problems. Preliminary analysis of this protocol data has yielded several important findings, including (a) me­chanical designers progress from systematic to opportunistic behavior as the design...
    Resource Type:
    Technical Report
    Full Text:
    , people have a strong tendency to not report exactly what happened but what they perceived happened

  • Consistent distributed database state maintenance

    Creator:
    Minoura, Toshimi, Owicki, Susan S., and Wiederhold, Gia
    Abstract:
    A theory for resiliency control of distributed database sys­tems is developed, and schemes that preserve the consistent global database state in the presence of site crashes and message link failures are discussed. The schemes can at least theoretically be paired with any concurrency control scheme that produces y-serializable executions. Further,...
    Resource Type:
    Technical Report

  • Design and implementation of a HELM user interface

    Creator:
    Singh, Bopinderjit (Bob), Brown, Carol E., and Lewis, Ted G.
    Abstract:
    This research paper is limited to the User Interface of the modeling language of HELM (Hierarchical Environment for Linear Modeling). In attempt to better describe the user interface for HELM, some examples and portions of Carol Brown's report are included for ease of reading and a brief overview of the...
    Resource Type:
    Capstone Project and Technical Report
    Full Text:
    and portions of Carol Brown's report are included for ease of reading and a brief overview of the

  • The role of documentation in program modification tasks

    Creator:
    Tolman, David M.
    Abstract:
    This paper reports the findings of two studies conducted at Oregon State University. The first set of studies compares use of header comments versus mnemonic procedure and function names by programmers performing tasks relating to modification tasks. The second study compares the use of header comments versus in-line comments when...
    Resource Type:
    Capstone Project
    Full Text:
    maintenance tasks. Each requires special skills . To find and fix bugs in a program the programmer must be