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Filtering by: Creator Wendland, David W. Remove constraint Creator: Wendland, David W. Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • Castle Rocks : a late miocene eruptive center at the north end of Green Ridge, Jefferson County, Oregon

    Creator:
    Wendland, David W.
    Abstract:
    Castle Rocks is 12 miles east of Mt. Jefferson, in the central Cascades of Oregon. The area contains volcanic rocks ranging from mid-Miocene to Holocene in age. These rocks record alternating periods of tholeiitic and calc-alkaline volcanism. The oldest rocks in the area range from basaltic andesite lava flows to...
    Resource Type:
    Masters Thesis

  • Type systems of object-oriented programming languages

    Creator:
    Sandberg, David W.
    Abstract:
    Three different approaches to type checking have been taken in object-oriented programming languages. Smalltalk-80 uses run-time type checking. C++ uses subtypes. A third alternative is to use parameterized types. We examine the difficulties of programming in an object-oriented fashion with compile-time type checking and argue that parameterized types are better...
    Resource Type:
    Technical Report
    Full Text:
    - ORIENTED PROGRAMMING LANGUAGES David W. Sandberg Department of Computer Science Oregon State

  • Smalltalk and exploratory programming

    Creator:
    Sandberg, David W.
    Abstract:
    Using Smalltalk-80, programmers can produce prototypes much faster than with C or Pascal. What techniques do Smalltalk-80 programmers use to produce these prototypes? What is special about Smalltalk-80 that enables them to uses these techniques? Can these techniques be used with conventional languages such as C? In an attempt to...
    Resource Type:
    Technical Report
    Full Text:
    Programming* David W. Sandberg Computer Science Department Oregon State University Corvallis, Oregon

  • Grif : a graphical programming language for robotics

    Creator:
    Sandberg, David W.
    Resource Type:
    Technical Report
    Full Text:
    Graphical Programming Language for Robotics David W. Sandberg Department of Computer Science Oregon

  • Experience with an object-oriented virtual machine

    Creator:
    Sandberg, David W.
    Abstract:
    Several years ago we began development of an object-based programming language and environment which we call X2. We implemented X2 using a virtual machine similar to Smalltalk-80 implementations, but X2 does no message look-up. The implementation differs from most Smalltalk-80 systems in that objects are paged and in the ability...
    Resource Type:
    Technical Report
    Full Text:
    OBJECT-ORIENTED VIRTUAL MACHINE David W. Sandberg Department of Computer Science Oregon State

  • What is object-oriented programming?

    Creator:
    Sandberg, David W.
    Abstract:
    The term object-oriented is defined. This definition is then related to message-passing, inheritance, polymorphism, data abstraction, generics, and overloading.
    Resource Type:
    Technical Report
    Full Text:
    Programming? David W. Sandberg Department of Computer Science Oregon State University Corvallis, Oregon

  • An alternative to subclassing

    Creator:
    Sandberg, David W.
    Abstract:
    Smalltalk-80 obtains some of its expressive power from arranging classes in a hierarchy. Inheritance is an important aspect of this hierarchy. An alternative organization of classes is proposed that emphasizes description instead of inheritance. This alternative can be used with compile-time type checking and retains the important characteristics of Smalltalk's...
    Resource Type:
    Technical Report
    Full Text:
    David Sandberg Department of Computer Science Oregon State University Corvallis, Oregon l 7 l

  • Type checking and parameterized types

    Creator:
    Sandberg, David W.
    Abstract:
    A method for implementing parameterized types is given. Two simplifying restrictions are assumed: types are only parameterized with other types, and assignment is like that of SNOBOL, CLU, and Smalltalk. An algorithm for type checking that handles parameterized types and overloading is presented .
    Resource Type:
    Technical Report
    Full Text:
    Parameterized Types David Sandberg Department of Computer Science Oregon State University Corvallis

  • The design of the programming language X-2

    Creator:
    Sandberg, David W.
    Abstract:
    The design of an experimental object-based programming language is discussed. The language is intended for investigating techniques for organization of programs.
    Resource Type:
    Technical Report
    Full Text:
    Programming Language X-2 David W. Sandberg Department of Computer Science Oregon State University

  • Effect of late foliar applications of urea on protein, hardness, and yield of winter wheat cultivars (Triticum aestivum L.)

    Creator:
    Altman, David W.
    Abstract:
    The response of cultivars of winter wheat to foliar applications of urea was examined for grain protein content, yield, and kernel hardness. The objectives of this study were to measure the effect of urea on these three traits in diverse environments and to explain how potential responses could occur by...
    Resource Type:
    Masters Thesis
    Full Text:
    , Hardness, and Yield of Winter Wheat Cultivars (Triticum aestivum L.) AN ABSTRACT OF THE THESIS OF David