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- Biema, Michael K. van, et al.
(författare)
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The constraint-based paradigm : integrating object-oriented and rule-based programming
- 1990
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Ingår i: Proceedings of the Twenty-Third Annual Hawaii International Conference on System Sciences. Volume 1. - : IEEE Computer Society. ; , s. 358-366
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Konferensbidrag (refereegranskat)abstract
- The authors introduce a novel formalism that combines the object-oriented and rule-based paradigms in an elegant and orthogonal way. The constraint-based model is a generalization of traditional object-oriented paradigms and is based on three orthogonal subparadigms. The first is constraint-based invocation, which is a generalization of the traditional invocation where dispatch is done based on the types of the arguments. In constraint-based invocation, dispatch is done based on constraints that are arbitrary user-defined predicates. The second subparadigm is instance inheritance, a dual to the concept of class inheritance in the sense that class inheritance structures classes and instance inheritance structures instances. The third is procedural attachments (also known as active values or access-oriented programming), where a function is called in a data-driven manner. The semantics of this concept are generalized to all objects in the constraint-based model. A central philosophical argument is that so-called multiparadigm languages should be developed not by combination of paradigms in a partially integrated system, but by their synergistic unification under a new, subsuming paradigm.
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- Ioannidis, John, et al.
(författare)
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Porting AIX onto the Student Electronic Notebook
- 1990
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We describe the Student Electronic Notebook and the process of porting IBM’s AIX 1.1 to run on it. We believe that portable workstation-class machines connected by wireless networks and dependent on a computational and informational infrastructure raise a number of important issues in operating systems and distributed computation (e.g., the partitioning of tasks between workstations and infrastructure), and therefore the development of such machines and their software is important. We conclude by summarizing our activites, itemizing the lessons we learned and identifying the key criteria for the design of the successor machines.
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| 8. |
- Ioannidis, John, et al.
(författare)
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The Coherent Trivial File Transfer Protocol
- 1990
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- CFDP is a protocol that takes advantage of the broadcast nature of CSMA networks to speed up simultaneous one-to-many file transfers (e.g., when booting diskless workstations). The CFDP server listens and services requests for entire files or portions thereof. CFDP clients first determine whether the file they are interested in is already being transferred, in which case they "eavesdrop" and load as much of it as they can or they initiate a new transfer. The clients timeout when the server stops transmitting and if they are still missing parts of the file they request them with a block-transfer request. CFDP is a back-end protocol a front end is needed to handle naming and security issues. A simple such front end is also presented here.
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