作者：
LangeIBM Research
Tokyo Research Laboratory Yamato Kanagawa Japan
In his research the author is looking into the cooperation of methodology, language, and database in the design of object-oriented systems which are to be realized in an object-oriented programming language using an o...
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In his research the author is looking into the cooperation of methodology, language, and database in the design of object-oriented systems which are to be realized in an object-oriented programming language using an object-oriented database system (OODBMS). The focus is on some of the differences between traditional object-oriented design and object-oriented database design. For this purpose a small formal model of a contemporary OODBMS is built. This model describes abstractions of the most important data structures of OODBMS and their associated functionality. Based on both a pragmatic and a theoretic understanding of the architecture of contemporary OODBMSs, the author aims at presenting some of the issues to be considered in object-oriented database design such as: object management, object retrieval, and concurrency.< >
The emerging research area of computer supported cooperative work (CSCW) has yielded a number of groupware applications in recent years. The application and installation of these systems in large organization or for t...
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The emerging research area of computer supported cooperative work (CSCW) has yielded a number of groupware applications in recent years. The application and installation of these systems in large organization or for the support of inter-organizational cooperation requires information about the organizational environment in which they are used. The TOSCA system which is described aims to provide that kind of information to users and applications. The author describes the object-oriented data model, the design of the multimedia user interface, the integration with other applications and the architecture of TOSCA.< >
Recent developments in knowledge-based systems technology offer an excellent and effective approach to building management support systems for strategic management. We have developed a hyperknowledge support system fo...
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Recent developments in knowledge-based systems technology offer an excellent and effective approach to building management support systems for strategic management. We have developed a hyperknowledge support system for strategic management in the forest industry, and have tried it out in several strategic business units in a major corporation. The core of the system is an object-oriented expert system, which has been overlaid with a hyperknowledge support system. This turns out to be a useful construct, as we get a non-trivial level of knowledge representation and an attractive and easy-to-use support system. We tested the system with 30 managers and some early results show definite improvements in the quality of some key elements of the strategic management process. Our results show so far that hyperknowledge support systems promise to have a significant impact on strategic management.< >
There are many problems facing scientists in their efforts to use computers to manage, access, and analyze data. One serious problem is the heterogeneity of data sources. Previous research into accessing heterogeneous...
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There are many problems facing scientists in their efforts to use computers to manage, access, and analyze data. One serious problem is the heterogeneity of data sources. Previous research into accessing heterogeneous data has not addressed problems with accessing large data sources that are not managed by database management systems. We believe that an object-oriented database management system can be used to implement an object-oriented heterogeneous database (OOHDB) that efficiently addresses the problem of heterogeneity among large scientific property databases. The object-oriented data model provides a powerful modeling paradigm for representing complex scientific data. objects within the OOHDB hide heterogeneity among various data sources. Efficient access to external data is achieved by representing external data with a small amount of data stored within the OOHDB.< >
Advanced applications in fields like electronic publishing and telecooperation face the problem of handling multimedia information. Conventional database systems do not offer adequate support for storage management as...
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Advanced applications in fields like electronic publishing and telecooperation face the problem of handling multimedia information. Conventional database systems do not offer adequate support for storage management as they do not provide for the modeling, indexing, and manipulation of multimedia data. Database management systems need to be extended if they should be able to handle multimedia information like audio and video. In this paper we present an approach of extending the data model of an object-oriented database system by means of schedules which allow for the description of the temporal characteristics of multimedia operations as they occur when modeling time-dependent data like audio and video. First, we present a model of schedules and define the basic concepts and semantics to execute time-dependent operations. Second, we introduce the specification language as an extension to the VODAK Model Language and illustrate the concepts by examples. Finally, we briefly discuss the impact of integrating multimedia data modeling support into a database management system on the system architecture.< >
ALCHEMIST is a general purpose object-oriented transformation generator. ALCHEMIST provides a new approach to developing transformations between any well-defined representations. It allows users to define the syntacti...
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ALCHEMIST is a general purpose object-oriented transformation generator. ALCHEMIST provides a new approach to developing transformations between any well-defined representations. It allows users to define the syntactic structure of the data representations and the related structure associations with a grammar notation. These grammars can then be augmented with semantic operations. From this description a persistent object-oriented representation is formed and a transformation module is generated automatically. This transformation module relies on an object representation of the parse tree. The principles underlying ALCHEMIST are discussed and its object-oriented design decisions are described.< >
Biochemical techniques have given to biology experimental tools for sequencing genome fragments. These fragments were of a short length/spl minus/often corresponding to a single gene/spl minus/until the development of...
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Biochemical techniques have given to biology experimental tools for sequencing genome fragments. These fragments were of a short length/spl minus/often corresponding to a single gene/spl minus/until the development of extremely fast sequencing methods. Now, large sequencing projects have been started, leading to the availability of huge continuous fragments (300 kBytes for yeast chromosome III). Besides the problem of storing and representing such an amount of data, there is also the fact that the internal organization of these large fragments is often completely unknown. Consecutively, in the near future, the data and knowledge bases dedicated to molecular biology will be most certainly associated with sequence analysis systems in a way to help study the unannotated fragments. We present an example of such association between two biological object-oriented knowledge bases/spl minus/ColiGene (for Escherichia coli) and MultiMap (for mammalian genomes)/spl minus/and two sets of methods that are able to communicate with them: Digit (Dynamics and Interactive Graphical Integrated Tools) and Misa (Modules for Integrated Sequence Analysis). Then we show how it is possible to formalize the methods under an object-oriented knowledge representation model for tasks.< >
Presents a methodology for managing information resources by permitting aggregations of mixed-media documents to be interactively defined, shared, and managed using relational database management technology in concert...
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Presents a methodology for managing information resources by permitting aggregations of mixed-media documents to be interactively defined, shared, and managed using relational database management technology in concert with an extended object-oriented data model. This hybrid approach, based on a polymorphic object model (POM), allows the definition and instantiation of new types of compound documents without requiring modifications to be made to the underlying database schema. Existing documents and results from database queries are dynamically organized into individually meaningful categories as objects using a predicate-based mechanism. Furthermore, the authors have developed a prototype document management system based on the POM. Analysis indicates that gains in flexibility are traded for slightly increased amounts of meta-data management overhead and document retrieval latencies when compared to conventional DBMS technology.< >
Meeting memory features are poorly integrated into current group support systems (GSS). This paper discusses how to introduce meeting memory functionality into a GSS. The author first introduces the benefits of a good...
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Meeting memory features are poorly integrated into current group support systems (GSS). This paper discusses how to introduce meeting memory functionality into a GSS. The author first introduces the benefits of a good meeting and organizational memory to an organization. Then, challenges such as storing semantically rich output, building up the meeting memory during the meeting with a minimum of additional effort and integrating meeting memory into organizational memory, and privacy protection are discussed. Finally, using the group-objectobject-oriented model of a GSS, the author shows how meeting memory functionality can be implemented in a GSS.< >
We present on-going research concerning an objectoriented associative memory. It is a massively parallel architecture, fully programmable and configurable, composed of VLSI circuits. It is well adapted to genome data...
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We present on-going research concerning an objectoriented associative memory. It is a massively parallel architecture, fully programmable and configurable, composed of VLSI circuits. It is well adapted to genome data processing. DNA and proteins sequences alignment is a very important application in biology research. Standard sequences alignment usually entails software implementation with disastrous execution time (typically one year). A parallel implementation can solve such a problem. Rapid-2 will be able to execute and accelerate genome tasks. We programmed and simulated several variants of the Needleman and Wunsch algorithm (1970) with progressive complexity (gaps, Dayhoff mutation matrix). Execution time evaluations of all these methods are presented. We consider that Rapid-2 could improve software implementation of a factor 100.< >
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