• Journal of the Korean Society for information Management
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• v.28 no.3
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• pp.65-82
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• 2011

Statement of responsibility in bibliographical records plays a key role in clarifying intellectual responsibility of the work, and it also plays a role in making up access points. However, cataloging rules for the statement of responsibility mostly deal with the distinction between the principal role and minor roles. This becomes a problem because the responsibility type itself is more important than the order of the types. For this reason, in this paper I will explore improvements of the description methods of statement of responsibility by organizing the role indicators. Namely, using the role indicators more effectively than the current description methods do, we can collocate the dispersed statements of responsibilities. The role indicators can also be used for an author facet in information retrieval and can provide additional information for authority control.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.7B
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• pp.605-619
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• 2003

The main memory DBMS(MMDBMS) efficiently supports various database applications that require high performance since it employs main memory rather than disk as a primary storage. In this paper, we discuss the index manager of the Tachyon, a next-generation MMDBMS. Recently, the gap between the CPU processing and main memory access times is becoming much wider due to rapid advance of CPU technology. By devising data structures and algorithms that utilize the behavior of the cache in CPU, we are able to enhance the overall performance of MMDBMSs considerably. In this paper, we address the practical implementation issues and our solutions for them obtained in developing the cache-conscious index manager of the Tachyon. The main issues touched are (1) consideration of the cache behavior, (2) compact representation of the index entry and the index node, (3) support of variable-length keys, (4) support of multiple-attribute keys, (5) support of duplicated keys, (6) definition of the system catalog for indexes, (7) definition of external APIs, (8) concurrency control, and (9) backup and recovery. We also show the effectiveness of our approach through extensive experiments.