From: skseo@dbserver.kaist.ac.kr (Seo Sang-Koo)
Subject: DASFAA'93 Advance Program
Organization: Korea Advanced Institute of Science and Technology
X-Newsreader: TIN [version 1.1 PL8]
Date: Sat, 19 Dec 92 02:50:11 GMT

Followings are the Advance Program of DASFAA'93. 

--------------------------------------------------------
	 the 3rd International
Symposium on Database Systems for Advanced Applications
--------------------------------------------------------

CONTENTS

INVITATION
ORGANIZATION
GENERAL INFORMATION
PROGRAM SCHEDULE
TECHNICAL PROGRAM
REGISTRATION
HOTEL ACCOMMODATION
SYMPOSIUM VENUE
SOCIAL PROGRAM
TOUR INFORMATION
ABOUT KOREA


Dear Colleagues:

It is my great pleasure to invite you to the third International
Symposium on Database Systems for Advanced Applications(DASFAA'93).
The last DASFAA'91 that took place in Tokyo, Japan in April 1991
featured 65 papers and over 300 participants from 16 countries.
DASFAA is an international symposium which especially focus on advanced
applications of database technologies and/or advanced DBMS technologies.
Since the first DASFAA was held in Seoul, Korea in April 1989, it
was decided to be held biennial. So far, response to DASFAA'93
have been tremendous: 52 high quality papers from 11 countries will
be presented at the symposium.

DASFAA aims at bringing together researchers, developers and advanced users
from academia, business and industry to exchange information and explore
new idea about advanced applications of databases and advanced database
technologies.

The city of Taejon where DASFAA'93 takes place will offer you as much
excitement as the symposium itself, since EXPO'93 will be held from July
near the symposium venue. You will experience more than the world-premere
symposium in Database.

I am extremely grateful to all the people who have been giving their kind
help organize DASFAA'93: all the organization commitee members, all
the program commitee members. I am sure that many of you were considerate
enough to contribute to the success of this symposium in Taejon.

Sukho Lee
General Chairperson


Honorary Chairperson
Chan Mo Park (KISS, Korea)

General Chairperson
Sukho Lee (Seoul National University, Korea)

Steering Commitee Chairperson
Hideko Kunii (Ricoh, Japan)

Steering Commitee Vice-Chairperson
Sukho Lee (Seoul National University, Korea)

Steering Commitee
Songchun Moon (KAIST, Korea)               
Yoshifumi Masunaga (University of Library and Information Science, Japan)
Myung-Joon Kim (ETRI, Korea)
Rons SAcks-Davis (Royal Melbourne Institute of Technology, Australia)
R. C. T. Lee (National Tsing-Hua University, ROC)
Tok-Wang Ling (National University of Singapore, Singapore)
Yahiko Kambayashi (Kyoto University, Japan)

Program Committee Co-Chairpersons
Songchun Moon (KAIST, Korea)               
Hideto Ikeda (Hiroshima University, Japan)

Program Comittee
Hae-Young  Bae (Inha University, Korea)
Doo-Kwon  Baik (Korea University, Korea)
G.G.Belford (University of Illinois at U-C, USA)
Elisa Bertino (University. of Geneva, Italy)
Chin-Chen Chang (National Chung Cheng University, ROC)
Qiming  Chen (UCLA, USA)
Dong-Hoon Choi (Dongduck Women's University, Korea)
Yoon Chul Choy (Yonsei University, Korea)
A.K.Elmagarmid (Purdue Uviversity, USA)
J.C.Freytag (DEC Munich, Germany)
T.Haerder (University of Kaiserslautern, Germany)
Ki-Joon Han (Kon-Kuk University, Korea)
Bong Hee Hong (Pusan National University, Korea)
Hajime Horiuchi (Hitachi Ltd, Japan)
Tiko Kameda (Simon Fraser University, Canada)
Kyoji Kawagoe (NEC, Japan)
Masaru Kitsuregawa (Tokyo University, Japan)
Yasusi Kiyoki (University of Tsukuba, Japan)
H.F.Korth (Matsushita Information Technology Lab., USA)
J.Y.Lee (Postech, Korea)
Tok-Wang Ling (National University of Singapore, Singapore)
Hongjun Lu (National University of Singaprore, Singapore)
Wo-Shun Luk (Simon Fraser University, Canada)
Vincent Lum (Chinese University of Hong Kong Hong Kong)
Akifumi Makinouchi (Kyushu University, Japan)
Shojiro Nishio (Osaka University, Japan)
Jong-Tae Park (Kyungpook National University, Korea)
Seog Park (Sogang University, Korea)
Calton Pu (Columbia University, USA)
Hans-J. Schek (ETH, Switzerland)
Sang H.Son (University of Virginia, USA)
K.Sugihara (University of Hawaii at Monoa, USA)
Kenji Suzuki (NTT, Japan)
Katsumi Tanaka (Kobe University, Japan)
A.Min Tjoa (University of Vienna, Austria)
M. Orlowska (University of Queensland, Autralia) 

Panels and Tutorial Chairperson
Kyu-Young Whang (KAIST, Korea)

Organization Co-Chairperson
Yoon-Joon Lee (KAIST, Korea)
Yoshifumi Masunaga (University of Library and Information Science, Japan)

Treasurer
Kyu Chul Lee (Chungnam National University, Korea)

Publicity
Sang Ho Lee (Sungsil University, Korea)

Local Arrangements
Myung Ho Kim (KAIST, Korea)

Publication
Kyung Chang Kim (Hongik University, Korea)
Hae Chul Lim (Hongik University, Korea)

Coordinators
Seog Park (Sogang University, Korea)
Hyun Chul Kang (Chungang University, Korea)

For any further information, please contact to:
DASFAA'93 Secretariat
c/o Prof. Yoon-Joon Lee
Dept. of Computer Science
KAIST
Kusong-dong, Yusong-Ku,
Taejon, 305-701, Korea
Tel: +82-42-869-3523
Fax: +82-42-869-3510
E-mail: yjlee@cs.kaist.ac.kr


GENERAL INFORMATION

DATE
Tutorials  April 6 (Tue.), 1993
Symposium  April 7 (Wed.) - 8 (Thr.), 1992

VENUE
Reviera Hotel, Taejon, Korea 

LANGUAGE
English is the official language of the Symposium.

HOST
Korea Information Science Society
Infomation Processing Society of Japan

IN COOPERATIONS WITH
IEEE Computer Society
ACM Special Interest Group on Management of Data

SPONSORS (tentative)
Korea Sience and Engineering Foundation
Chung Ho Computer Co.
Daou Tech. Inc.
Goldstar Software, Ltd.
IBM Korea,
Oralce Systems Korea
Samsung Advanced Instiute of Technology.

SECRETARIAT
DASFAA'93 Secretatriat
c/o Prof. Yoon-Joon Lee
373-1, Kusong-dong, Yusong-Ku,
Taejon, 305-701, Korea
Tel: +82-42-869-3523
Fax: +82-42-869-3510
E-mail: yjlee@cs.kaist.ac.kr



SCHEDULE


-----------------------------------------------------------------------
|\   Date|                |                     |                     |
| ------ |    6th April   |      7th April      |      8th April      |
|Time   \|                |                     |                     |
|--------|----------------|---------------------|---------------------|
|        |                |  A   |   B   |   C  |  A   |   B   |   C  |  
|    9:00|----------------|---------------------|---------------------|
|        |                |   Opening Session   |      |       |      |
|        |  Registration  |---------------------|      |       |      |
|        |                |                     |  S9  |  S10  |  S11 |
|   10:00|----------------|   Keynote Address   |      |       |      |
|        |                |                     |      |       |      |
|   10:30|                |---------------------|---------------------|
|        |                |        Break        |        Break        |
|   11:00|                |---------------------|---------------------|
|        |   Tutorial 1   |          |          |      |       |      |
|        |       &        |          |          |      |       |      |
|        |   Tutorial 3   |  S1      |      S2  |  S12 |  S13  |  S14 |
|        |                |          |          |      |       |      |
|        |                |          |          |      |       |      |
|   12:30|                |---------------------|---------------------|
|        |                |                     |                     |
|   13:00|----------------|        Lunch        |        Lunch        |
|        |                |                     |                     |
|        |     Lunch      |                     |                     |
|   14:00|                |---------------------|---------------------|
|        |                |      |       |      |      |       |      |
|   14:30|----------------|      |       |      |      |       |      |
|        |                |  S3  |  S4   |  S5  |  S15 |  S16  |  S17 |
|        |                |      |       |      |      |       |      |
|        |                |      |       |      |      |       |      |
|   15:30|                |---------------------|---------------------|
|        |   Tutorial 2   |        Break        |        Break        |
|   16:00|       &        |---------------------|---------------------|
|        |   Tutorial 4   |      |       |      |                     |
|        |                |      |       |      |                     |
|        |                |  S6  |  S7   |  S8  |        Pannel       |
|        |                |      |       |      |                     |
|        |                |      |       |      |                     |
|   17:30|----------------|---------------------|---------------------|
|        |                |                     |                     |
|   18:00|                |                     |                     |
|        |     Break      |       Banquet       |                     |
|        |                |                     |                     |
|        |                |                     |                     |
|   19:00|----------------|---------------------|                     |
|        |                                                            |
|        |                                                            |
|        |                                                            |
-----------------------------------------------------------------------



TECHNICAL PROGRAM

KEYNOTE ADDRESS

Vincent Lum
Systems Engineering Department,
Chinese University of Hong Kong

Title:
	Transcending Syntactical Constraints in a Multimedia Query Interface

Biography:
	 Vincent Lum received his undergraduate from the University
of Toronto in 1960, his Master degree from the University
of Washing in 1961, and his Ph.D. from the University of
Illinois in 1966.
Currently he is the Professor and Chairman of the systems
Engineering Department of the Chinese University of Hong Kong,
on leave from the Computer Science Department of the Naval
Postgraduate School of Monterey, California, where he is the
former chairman of the department.
Prior to joining the Naval Postgraduate School he spent 25
years with the IBM Company, most of his time in the Research
Division.
There he started and managed a number of research projects,
the works of some of which are quite well known in the 
professional community.
He is active in professional activities and has been a number
of the IEEE Computer Society's Distinguished Speaker Program
more than once, an associate editor for several renowned 
technical journals including the TODS and a former chairman 
in two of the IEEE Computer Society Technical Committees.
He is the co-founder of the VLDB Endowment which runs the 
annual VLDB Conference that he nurtured from its infancy to
its prestigious status today. 
He has been an organizer, chairman, program chairman, etc.
for numerous well known international conferences, and 
the author of a large number of original research papers  some of which are 
still cited decades after their publications.
He has been an invited speakers in many seminars and lectures worldwide.


Abstract:
	The SQL query interface with its linear syntax was developed two decades
ago for the I/O devices supporting character mode and has since then become a
standard. Its standarization has actually become an inhibitor to the
development of better casual user interfaces because vendors built
their query interfaces closely tied to the standard. Inspite of
the fact that today's I/O devices are so powerful and versatile, capable
of handling multimedia data at high speed, little,
except at the research level, has been done to
produce better casual user query interfaces.
Even in research and prototyping,
user interfaces reflect much of the SQL influence and retain
a lot of its approach and syntactical constraints. Our research is to
find ways to get rid of many of the constraints by
maximizing the use of the technologies of today's computers,
I/O devices and software.

Two major features in today's systems lend themselves to designing a casual
user interface that allows novice users to query a database system with
little background other than some fundamental understanding of the data
and the principles in constructing the interface. The first of these is
the support of multimedia data, permitting us to display
and make use of graphics, icons, sound, and other media data in our
design. The other is the availability of the windowing mechanism 
developed in recent years for nearly all the systems. Advantageous
applications of these two features will go a long way in creating a good
casual user interface.

While the advances of object oriented model and
systems will strongly enhance the applicability of database management
systems in various domains, the relational model,
inspite of its limited capability to express semantics, retains its appeal to
casual users because of its simplicity. 
Purely from the
practical point of view, we see that relational DBMS's will stay
with us for a long time, and designing and having
a good casual user interface for these systems will
make them much more user friendly and spread its usability to casual
users to a greater extent than it currently is.

In designing the query interface, we note that using graphics only for
interface captures the visual aspect of our senses. It is well
known that auditory coupled to visual sensor is very important to help
people understand and digest information. We therefore look into the
different ways where we can capitalize on this knowledge. For example,
we know that sound can be very effectively used to reconfirm user actions, to
direct or redirect attentions, and to provide assistances. 
An interface design should therefore integrate the use of sound 
and visual effects for these and other purposes.

We further note that, while users can generally define simple queries
easily with just about any conventional query interface of which SQL is
one, they have difficulty in forming the more complex queries. We
have observed that users invariably break complex queries into smaller
subqueries and recompose them to form a complex query. This fact is
verified again and again in database system classes when students can
form a complex query in multiple query statements linked together in 
a sequence of operations but not in one
statement, even though the power of the query language is capable of
supporting the subqueries formed into one statement.

Such a method of writing multiple statements to specify one
query is strictly a 'no-no' because it is akin to making
the query specification 'procedural' and asking the system to
execute multiple queries. Unquestionably the syntactical constraints
and the restricted 
way how a user can form a query in SQL further enhances the difficulty
to form a complex query in one statement.

Windowing mechanism can make the procedural part disappear because its
multitasking capability allows its users to create, open and close any
number of windows at will. It permits its users to suspend and switch
from one task to another at any time without detrimental consequences. This
allows us to make use of the mechanism to get rid of the
procedural effect and the syntactical constraints inherited from 
the SQL approach and the old technologies
even when a graphical user interface is used.

Naturally, regardless of what design we arrive at, it is important that
the interface should allow novel users and experts state their
queries with equal facility. The same interface must allow its users write 
simple queries simply and complex queries easier. It has to 
allow users the choice of the features they want instead of imposing 
choices on them regardless.

This talk will show how we make use of the two features mentioned above
and the ideas we just discussed 
to design a casual user query interface 
to achieve the goals just given.
We will make use of very few simple rules throughout in designing the
interface so that users will not be burdened with a lot of things to
remember, which generally leads to errors.

TUTORIALS

Tutorial 1
April 6, 1993, 10:00-13:00

Title:
Starbust :  An Extensible Database Manager

Speaker :
Guy M. Lohman
IBM Research Division, Almaden Center

Bibliography :
Dr. Guy M. Lohman is manager of Extented Relational Systems in the
Exploratory Database Systems Department at IBM Research Division's
Almaden Research Center in San Jose, California. He is also responsible
for the design and implementation of a rule-based, extendible query
optimizer for Starburst, an extensible relational database management
system prototype. Prior to that he developed, implemented, and
validated the query optimizer of R*, IBM's first distributed
database management system, for which he received a research Division Award.

Prior to coming to IBM in 1982, Dr. Lohman was a group supervisor 
at NASA/Caltech's Jet Propulsion Laboratory in Pasadena, CA.

Guy received his BA in Mathematics (1971) from Pomona College (Claremont,
CA) and his MS (1975) and Ph. D.(1977) in Operations Research
from Cornell University (Ithaca, NY).
His current research interests merge his backgrounds in Operations
Research and computer database management systems, including query
optimization, extendible DBMSs, performance evaluation, novel
applications of DBMS, and distributed and parallel databases.

Abstract :
The advantages of object-oriented database systems, including support
for complex types, encapsulation, and extensibility, are well-known.
Relational systems offer a complementary set of advantages,
including data independence, multiple views, and set-oriented queries.
Research is underway to investigate how these sets of advantages can be
research in the context of the Starburst prototype, which includes
an extensible type system, a cache for structured complex objects,
large unstructured objects (BLOBs), support for recursive 
queries, and a rules system to make the database more "active".

The course outline includes :
- Requirements of new applications (CAD/CAM, geographic, document,
multi-media, ...)
- Architecture for extensibility
  (user-defined storage methods and access methods)
- User-defined data types and methods (functions)
- Unstructured large objects (BLOBs)
- Structured complex objects
- Recursive queries (parts explosions, path expressions)
- Production rules ("active" database)
- Parallel execution


Tutorial 2
April 6, 1993, 14:30-17:30

Title :
Object-Oriented Database Technology and Its Applications to Multimedia
and Computer Network Management

Speaker :
Yoshifumi Masunaga
Dept. of Library and Information Science,
University of Library and Information,
Japan

Bibliography
Dr. Yoshifumi Masunaga is a full professor of the Department of Library
and Information Science, University of Library and Information Science,
Japan, where he is conducting the research projects of developing
advanced database systems for multimedia and computer network management.
He was a research scholar of the Computer Science Department of IIASA
(International Institute for Applied Systems Analysis, Vienna, Austria),
and a visiting scientist of System R* Project of IBM San Jose Research
Laboratory, San Jose, California, U.S.A..

He finished the Doctor Course of the Post Graduate School of
Technology of Tohoku Univ., Sendai, Japan and received the Doctor
of Engineering Degree in 1970.

He is a member of ACM, IEEE Computer Society, and the Chairperson of 
the Special Interest Group on Database Systems of the Information
Processing Society of Japan since 1991. He was the Executive Committee
Chairperson of DASFAA'91 held in Tokyo in April 1991.

Abstract :
This tutorial projects object-oriented database management system
as the next generation database management system. We start with
a history of database management systems developed so far, and
position the object-oriented database management system as
the third generation database management systems. This will be
followed by essential features of object-oriented database
management systems in terms of complex object support, differential
programming, impedance mismatch problem and others. Then we
overview the present status of the object-oriented database management
system product, and introduce some benchmark test results.
Object-oriented database mangement systems are suitable for managing 
data required for the advanced database applications such as CAD,
CASE, multimedia database, computer network management, cooperative
work support, and others. In this tutorial, the use of object-oriented
database management systems for multimedia database management and computer
network management applications are shown based on the author's
experience on research and development. Finally, the future problems
of the object-oriented database management systems are investigated 
particularly from the point of view of standardization and 
interoperability of object bases.


T3. ...... , 10:00-13:00, ...

T4. ...... , 14:30-17:30, ...


Paper Sessions


WEDNESDAY, APRIL 7, 1993, OPENING SESSIONS, 9:00-10:30 
--------------------------------------------------------------------
WELCOME ADDRESS: 9:00-9:30, by Dr. Chan Mo Park, President of KISS
KEYNOTE ADDRESS: 9:30-10:30, 
			 Vincent Lum ( Chinese University of Hong Kong )


S1. Multimedia, 11:00-12:30
--------------------------------------------------------------------
Towards Dynamics Animation on Object-Oriented Animation Database 
System "MOVE",
Kunihiko Kaneko, Susumu Kuroki and Akifumi Makinouchi

Relational Query Formulation by Pseudonatural Language Text 
Manipulation,
Hirofumi Amano and Yahiko Kambayashi

Similarity Retrieval on Pictorial Databases Based upon Module 
Operation,
Liang J. Chang, C. C. Chang and R. C. T Lee



S2. Multidatabase Systems, 11:00-12:30
---------------------------------------------------------------------
Efficient Global Transaction Management in Multidatabase Systems
Sharad Mehrotra, Rajeev Rastogi, Yuri Breitbart, Henry F. Korth and 
Avi Silberschatz 

Schema Transformation Processors for Federated Objectbases
Markus Tresch and  Marc H. Scholl      

Determining Schema Interdependencies in Object-Oriented Multidatabase 
Systems
Jian Yang and Mike P. Papazoglou                  


S3. Object-Oriented Database Systems, 14:00-15:30
---------------------------------------------------------------------
PINOL: A Persistent Inferential Object-oriented Language for 
Databases 	
Anne H.H. Ngu and Limsoon Wong             

Object-Oriented Database with Rule-Based Query Interface for Genomic 
Computation
Susum Goto, Norihiro Sakamoto and Takagi Toshihisa

LRU-S: A New Buffer Allocation Approach for OODBMS
Hanxiong Chen, Jeffrey Xu Yu, Kazunori Yamaguchi, Hiroyuki Kitagawa, 
Noboru Ohbo and Yuzuru Fujiwara

S4. Distributed Database, 14:00-15:30
--------------------------------------------------------------------
Enhanced Tree Quorum Algorithm for Replicated Distributed Databases    
Soon Myoung Chung   
 
Data Fragmentation and Allocation for PC-based Distributed Database 
Design
Minyoung Ra and Yang-Sun Park              

Strategies for Selection from Heterogeneous Relations
Chiang Lee and Cheng-Luu Tsai



S5. Industrial Database Applications, 14:00-15:30
---------------------------------------------------------------------
Information Integration Through Contract	
Toncan Duong, John Hiller and Ann Ngu

The DiNG - a parallel multiattribute file system for deductive 
database machines
T. A. Mueck

Database User Interface Design Editor	
Cuie Zhao, Ging Yang Choo, Che Kia Phua and Robin C.G. Seow


S6. Object-Oriented Data Models, 16:00-17:30
-----------------------------------------------------------------------------
An Object-Centered Data Model for Engineering Design Databases	
Huibin Zhao and Alexandros Biliris  

Conceptual Layers in an Object Oriented Database	
Gabriel Baum, Silvia Gordillo, Claudia Pons, Clara Smith and Calros 
Tau

Generating Object-Oriented Views from an ER-based Conceptual Schema
Tok Wang Ling, Pit-Koon Teo and Ling-Ling Yan


S7. Parallel Database, 16:00-17:30
---------------------------------------------------------------------
A Parallel Pattern Searching Algorithm in Object-oriented Databases 
using a Cellular Array Architecture
Stanley Y.W. Su, Soon J. Hyun and Rahul B. Patel

Evaluation of a Parallel Database Machine for Caller Dependent 
Routing   
Ilsoo Ahn           

A Design of a Transparent Backup System Using a Main Memory Database
Hiroki Takakura and Yahiko Kambayashi



S8. Access Methods, 16:00-17:30
-------------------------------------------------------------------------------
Abstract Indexing Mechanism of the Extensible DBMS MODUS	
Kazutaka Furuse, Kazunori Yamaguchi, Hiroyuki Kitagawa and Noboru Ohbo

A New Indexing and Text Ranking Method for Japanese Text Databases 
using Simple-word Compounds as Keywords
Yasushi Ogawa, Ayako Bessho, Masajirou Iwasaki, Mina Nishimura 
and Masako Hirose

B-Tree Concurrency Control Algorithm for Nested Transaction Systems    
John Kyu Lee        


THURSDAY, APRIL 8, 1993
--------------------------------------------------------------------

S9. Real-Time Database, 9:00-10:30
--------------------------------------------------------------------
Scheduling and Concurrency Control for Real-Time Database Systems    	
Sang H. Son and  Seog Park                   

A Protocol for Consistent Checkpointing Recovery for Time-Critical 
Distributed Database Systems
Junguk L. Kim, Taesoon Park, Prabaharan I. Swarnam and Myung-Joon Kim

A Token-Based Synchronization Scheme using Epsilon-Serializability 
and Its Performance for Real-Time Distributed Databases
Sang H. Son and Spiros Kouloumbis   


S10. Query Processing(I), 9:00-10:30
---------------------------------------------------------------------
Query Processing Techniques in the Team-Oriented Database Query 
Language	
Jorng-Tzong Horng, Gwo-Dong Chen and Baw-Jhiune Liu            

Distributive Join Algorithm for Cube-Connected Multiprocessors	
Soon Myoung Chung and Jaerheen Yang        

Optimization of Chain Queries	
Sergio Greco



S11. Rule Management, 9:00-10:30
---------------------------------------------------------------------
Database Updates Using Active Rules: A Unified Approach for 
Consistency Maintenance
Jong P. Yoon        

A Database Rule Language Compiler Supporting Parallelism  	
C. de Maindreville, J.-P. Cheiney and G. Kiernan          

A Knowledgebased System Converting ER Model into an Object-Oriented 
Database Schema
Il-Yeol Song and Heather M. Godsey   


S12. Temporal Database, 11:00-12:30
---------------------------------------------------------------------
Design of Historical Databases using the 3-D Relational Data Model
Tae Nam Cho and Kyung Chang Kim             

Offstage Objects and their Renovations in the Temporal Object System 
TOS
Abad A. Shah, F. Fotouhi, W. Grosky, S. P. Rana and A. Vashishta           

Logical Data Independence Via Views: A Misapprehension?	
J.M. de Graaff, R.J. Veldwijk and M. Boogaard         


S13. Integrity, 11:00-12:30
---------------------------------------------------------------------
Optimizing Distributed Integrity Constraints	
Subhasish Mazumdar  

On Deriving Specialization Constraints over Complex Objects
Minoru Ito and M. Nakanishi

Improving Integrity Checking for $@&E(J-constraints
Tok Wang Ling and Sin Yeung Lee



S14. Deductive and Fuzzy Database, 11:00-12:30
--------------------------------------------------------------------
On Exclusive Disjunction in Deductive Databases	
Dong-Hoon Choi and Lawrence J. Henschen

A Fuzzification of the Relational Data Model	
Doheon Lee, Myoung Ho Kim and Hyung Lee Kwang     

Enhancing the Fuzzy Set Model with Positively Compensatory Operators	
Joon Ho Lee, Won Yong Kim and Myoung Ho Kim                   


S15. Concurrency Control and IO Schedulings, 14:00-15:30
--------------------------------------------------------------------
A Pessimistic Concurrency Control Algorithm in Multidatabase System  
Hyunyoon Yun and Buhyun Hwang             

An Optimistic Concurrency Control Scheme for Real-Time Database 
Systems
Juhn Young Lee and  Sang H. Son              

New Disk Scheduling Algorithms for Reduced Rotational Latency
Kitae Hwang and Heonshik Shin         


S16. Query Processing(II), 14:00-15:30
---------------------------------------------------------------------
Intensional Query Processing in Object-Oriented Database Systems    	
Yang Hee Kim and Hyoung-Joo Kim                    

Heterogeneous Query Optimization using Maximal Sub-queries 
A. HH Ngu, LL Yan and LS Wong                     

Temporal Query Processing for Scene Retrieval in Motion Image 
Databases
Junichi Takahashi

Efficient Processing of Time-Joins in Temporal Databases
Satyendra P. Rana and Farshad Fotouhi       



S17. Intelligent User Interface, 14:00-15:30
---------------------------------------------------------------------
Qualitative Behavior Modeling of Information Processing Components	
Sang Hun Oh, Yoon Joon Lee and Myoung Ho Kim                  

Explaining the User Queries Failures in Natural Language Database 
Interfaces
Zouheir Trabelsi, Yoshiyuki Kotani and Hirohiko Nisimura     

A Multimedia Database for an advanced Teleshopping Application
D. Maino, F. Mercalli and R. Negrini


PANEL SESSION, 16:00-17:30
---------------------------------------------------------------------

CLOSING SESSION, 17:30-18:00
---------------------------------------------------------------------


REGISTRATION

Participants are encouraged to register for the Symposium as soon as
possible. For the registration, complete the enclosed Registration Form
and return it to the DASFAA'93 Secretariat with the registration fee
no later than February 15, 1993. Those who register after the deadline
will be liable to pay an additional fee. On-site registration is possible
at the registration Desk, Riviera Hotel.
Registration hours : April 6 (Tue.) - 8 (Thr.) 08:30 ~ 17:00


REGISTRATION FEES

                           Received by    Received after
    Categories             Feb. 15, 1993  Feb. 15, 1993   

              Members*         $260            $320  
Symposium     Non-Members      $320            $380
              Students**       $100            $120

              Members*         $100            $120  
Tutorial      Non-Members      $120            $150
(per one)     Students**       $50             $60

* Members of KISS, IPSJ, SCS, IEEE, ACM
** Full time student, please submit a copy of ID card showing your
 photograph with this form.

Note:
 1. Proceedings will be offered to all registered persons.
 2. Banquet is included in the registration fee except students.
 3. Additional banquet tickets for students and accompanying persons
   will be sold on-site at $50


PAYMENT

All payments must be made in US dollar and Korea Won. Payment for the
fee is to be made in following manner.

Bank Draft
Bank draft should be made payable to "DASFAA93".
Personal checks will not be accepted.

Bank Transfer
Name of Bank : Korea Exchange Bank, Taejon Branch, Taejon, Korea
Account Name : DASFAA93
Account No. : No. 034-13-48121-9,
Please note that the bank charge for remittance must be born by the
applicant.

CONFIRMATION

Upon receipt of the registration form and payment, the Symposium Secretariat
will send back a confirmation/receipt, which should be presented on
arrival at the registration desk.

CANCELLATION AND REFUND

Confirmation must be notified in writing to the Symposium Secretariat
for cancellation received before Feburary 28, 1993, 30% of the fee will 
deducted before making refund (after the Symposium). No refunds will
be made for the cancellation beyond this date.



HOTEL ACCOMODATION

A block of rooms has been reserved until March 15th, 1993. After this date,
room reservations will be accepted on a space available basis. Overflow
reservations for the Riviera hotel are also handled by the Riviera. For
booking the hotel, complete the enclosed Hotel Reservation Form and
return it to the hotel directly.


Room Type*:  _Twin   w90,000       _Ondol**   w80,000

* The room rates at the conference date are subject to change
due to currency rate($ 1 corresponds to about w795) and include 10% service
charge and 10% government tax.
** Ondol is the Korean under-floor heating system.


CONFERENCE VENUE

LOCATION

The symposium and tutorials will be conducted at the Riviera Hotel,
Taejon. It is located in Taejon's well-known hot spring area
which includes several interesting attractions such as Kyeryong Mountain
National Park and National Science Museum. Taedok Science Town, which
includes many high technology scientific research center, is also
located within a few minute drive. Other local features are easily accessible
via public transportation, including Bomum Maountain Park and Fortress,
Taechong Multipurpose Dam and Yusong Country Club. Taejon also provides
easy access by train or bus to several historic places such as Buyo and
Kyeongjoo. They were the capitals of Korean ancient kingdoms, called
Baekje and Shila, which had many interactions with Japanesse and Chinese
ancient countries.

LOCAL TRANSPORTATION

There are three choices for ground transportation from the Kimpo airport
to the hotel (the conference site). Please consult Tourist Information
Center of the Korea National Tourism Co. (KNTC) at your arrival in Kimpo
International Airport.

(1) By the charted bus
(The Kimpo Airport -> The City Air Terminal -> The Hotel) 
The chartered buses for the symposium attendees departs from the
Terminal 2 building of the Kimpo Airport at 3:00 PM and from the City
Air Terminal at 4:00 PM for April 6th and April 7th (one time per day).
It takes about one hour from the Kimpo Airport to the City Air Terminal,
and about two hours from the City Air Terminal to the hotel which makes
three hours in the hotel. The fare is about $15 per person.  This will
be the most convenient way of local transportation for teh attendees.

Note: Near the City Air Terminal, there are several attractions and
shopping facilities including Korea Exhibition Center and large
department stores. If you arrive at the Kimpo Airport too early,
you can enjoy shopping and sightseeing around the City Air Terminal.

(2) By Train
(The Kimpo airport -> The Seoul Train Station -> The Taejon Train Station
-> The Hotel) 
Trains depart from the Seoul train station to the Taejon 
train station about every 15 minutes during daytime and every 40 minutes 
during the night. It takes about 2 hours from the Seoul to Taejon
station. It cost about $10.00 for a railroad ticket. Taxi fare from 
the Kimpo airport to the Seoul Train Station is about $8.00. It takes 
about 40 minutes from the Kimpo airport to the Seoul Train Station. 
Taxi fare from the Taejon Train Station to the hotel is about $4.00. 

Note: Due to many people making trips to and from Seoul and Taejon,
the train tickets are usually competitive. The availability of every 
train ticket is not guaranteed. You might have to wait for one or more
hours for your train.

(3) By Express Bus
(The Kimpo airport -> The Seoul Express bus station in Banpo -> 
The Taejon Express bus station -> The Hotel) 
Express buses depart from the Banpo bus station to the Taejon bus
station about every 10 minutes from the 6 A.M. to 8 P.M. It will take
about 2 hours from the Seoul to Taejon station. It costs about $4.00
for an express bus ticket. Taxi fare from the Kimpo airport to the 
Banpo Express bus station is about $8.00. Taxi fare from the Taejon 
express bus station to the hotel is about $4.00.

Note: The Express bus tickets are usually very competitive. The 
availability of every bus ticket is not guaranteed. You might have
to wait for one or more hours for your bus.



SOCIAL PROGRAM

OPENING CEREMONY

All participants and accompanying persons are cordially invited to
attend the opening ceremony.
Date and Time : April 7 (Wed.) 09 : 30 ~ 10 : 00
Place         : Riviera Hotel, Taejon


BANQUET
	
A Banquet featuring Korean folk music and dances will be provided for
an enjoyable evening. The banquet is included in the registration fee.
The additional banquet for accompanying persons will be sold at the
registration desk. (US $50)
Date and Time : April 7 (Wed.), 17 : 30 ~ 19 : 00
Place         : Riviera Hotel, Taejon


TOUR INFORMATION

POST CONFERENCE TOUR

KYOUNGJU (1 night 2 days tour)

Kyoungju is one of Korea's most important cultural and historical sites.
This city was the capital of the Shilla Dynasty, a kingdom that had
begun about 2,000 years ago and united the entire Korean peninsula
under one government for the first time in the 7th century. As such,
the city itself is a vast outdoor possessing no fewer than
270 important national treasures. There is no better museum place
to go to get a close look at Korea's ancient history as well as
some of the country's most outstanding buddhist temples and heritages.

CHEJU ISLAND (2 night 3 days tour)

Called Cheju-Do in Korean, this volcanic island is the country's
largest and southernmost. The flora and fauna here are quite different
from those of the mainland, as are the local customs, dress,
dialect, houses, and food. The lava and other rock formations are like
something out of fantasy, Cheju Island's beautiful beaches and
other seaside resorts attract thousands of tourists. The island is
Korea's favorite honeymoon destination.

MT. SORAK NATIONAL PARK (2 nights 3 days tour)

Mt. Sorak, the highest mountain in the T'aeback Range, is near the east
coast not far from the city if Sokch'o. The mountain's name means
"Snow Peaks" an appropriate designation for a place where the snow
begins falling in autumn and doesn't melt until midspring. The park
is largely divided into two areas along geographical line : the eastern
half is famous for its steep cliffs and waterfalls. And you can enjoy
breath-taking scenes of valleys and peaks of unusual shape
in the western half.

For further and detail information, please contact to
Mr. Choi, Chul Won
c/o DASFAA'93
Universal Air Service,
TAejon, Korea
Tel: +82-42-252-0587~8
Fax: +82-42-252-0586


ABOUT KOREA 

PASSPORT & VISA 
Every foreign visitor entering Korea must be in possession of a valid
passport. No visa are required for delegates from the following countries 
according to the reciprocal visa exemption agreement with Republic of Korea.

Austria/ Bahamas/ Bangladesh/ Barbados/ Belgium/ Colombia/ Costa Rica/
Denmark/ Dominican Republic/ Finland/ France/ Germany/ Granada/ Greece/
Iceland/ Ireland/ Italy/ Lesotho/ Liberia/ Luxemburg/ Malaysia/ Mexico/
The Netherlands/ Norway/ Pakistan/ Peru/ Portugal/ Spain/ Singapore/
Surinam/ Sweden/ Swizerland/ Thailand/ Tunisia/ Turkey/ The United Kingdom

Delegates from other countries may stay up to 15 days without visa.
Those who intend to stay longer than 15 days obtain entry visa from
a Korean diplomatic or consular mission abroad as they prefer.
In applying for visa, a visa applicant should tender a valid passport,
visa application form(obtainable from Korean consulate),
and two photographs (5cm x 4cm).

CURRENCIES & CREDIT CARDS

Korean currency is the Won. It comes in 10,000 Won, 5,000 Won, 1,000 Won,
bills and 500 Won, 100 Won, 50 Won, 10 Won coins.
Foreign currency or traveler's checks are exchangable to Korean Won
at major banks and other authorized money changers. The change rate
is subject to change with market fluctuations. One US dollar is
equivalent to about 790 Won (?) as of Dec. 1992. 
Most stores, Hotels, department stores and restaurants will accept
credit cards like Visa, American Express, Diners Club, Master Card
and Carte Blanche, etc.

CLOTHES AND WEATHER

April is spring in Korea. In Taejon, the days are pleasantly warm and
sunny (average 15~20C). Spring clothing is recommended with a jacket
for evening.


SYMPOSIUM REGISTRATION FORM (DASFAA'93)
April 6-8, 1993
Riviera Hotel, Taejon, Korea

------------------------------------------------------------------------
Please return to:
DASFAA'93 Secretariat
c/o Prof. Yoon-Joon Lee
Computer Science Department, KAIST                  Tel: +82-42-869-3523
Kusong-dong, Yusong-ku                              Fax: +82-42-869-3510
Taejon, 305-701, Korea                      E-mail: yjlee@cs.kaist.ac.kr
------------------------------------------------------------------------

* For prompt and precise communication, Please complete this form
 (type or print) carefully, and return to us by air-mail or fax
 no later than Feb. 15, 1993

Title: Prof./Dr./Mr./Mrs.

Name: ___________________________ _________________________________
              family name                     given name 

Affiliation:  _____________________________________________________

              _____________________________________________________

Mail Address: _____________________________________________________

              _____________________________________________________

              _____________________________________________________
                       Zip Code                Country

Tel: _______________ Fax: _____________ E-mail: ___________________

Registration Fee for Symposium and Tutorial

                           Received by    Received after         Amount
    Categories             Feb. 15, 1993  Feb. 15, 1993   

              Members*         $260            $320  
Symposium     Non-Members      $320            $380
              Students**       $100            $120
                                               Subtotal 1      $_________

              Members*         $100            $120  
Tutorial      Non-Members      $120            $150
              Students**       $50             $60

Please circle your tutorial preference  1   2   3   4
                  Subtotal 2   $_______ x ___ tutorials =      $_________


Grand total = subtotal 1 + Subtotal 2                          $_________

* Members of KISS, IPSJ, SCS, IEEE, ACM
** Full time student, please submit a copy of ID card showing your
 photograph with this form.

Note:
 1. Proceedings will be offered to all registered persons.
 2. Banquet is included in the registration fee except students.
 3. Additional banquet tickets for students and accompanying persons
   will be sold on-site at $50


PAYMENT OF FEE

Please check an appropriate box.
_ Bank Transfer : I will remit/have remitted the above grand total on (date)
                  _________________ through my bank _______________ to the
                  account of (DASFAA93, Acct. No. 034-13-48121-9,
                  Korea Exchange Bank, Taejon Branch, Taejon, Korea).

_ Bank Draft : I enclose a bank draft for the above grand total payable to 
              "DASFAA93".

* Note - No personal checks will be accepted.
       - Please make duplicate copies of this completed Registration Form
         and remittance certificate and present it at the registration desk.


Date: __________________  Signature: ______________________________




Office Use Only

Date:  _______________

Reg. No.: ____________



Hotel Reservation Form (DASFAA'93)
Deadline : March 15, 1993

--------------------------------------------------------------
Please return to:
Riviera Hotel 
Attn: Reservation Department
Yusong-ku, BongMyung-dong,           Phone: +82-42-823-2111
Taejon, Korea                        Fax: +82-42-822-5250
--------------------------------------------------------------

Please complete all the information (type or print), and mail (or fax)
it directly to the hotel.

Prof. /Dr./Mr./Ms.

Name: ___________________________ _________________________________
              family name                     given name 

Affiliation:  _____________________________________________________

              _____________________________________________________

Mail Address: _____________________________________________________

              _____________________________________________________

              _____________________________________________________
                       Zip Code                Country

Tel: _______________ Fax: _____________

Room Type*:  _Twin   w90,000       _Ondol**   w80,000

Arrival Date:_________________  Departure Date:____________________
* The room rates at the conference date are subject to change
due to currency rate($ 1 corresponds to about w795).  'w' is korean currency
unit, called won.
** Ondol is the Korean under-floor heating system.

Note:  
A block of rooms has been reserved until March 15th, 1993. After this date,
room reservations will be accepted on a space available basis. Overflow
reservations for the Riviera hotel are also handled by the Riviera, and the
some of lower rates apply.



DATE ______________________      SIGNATURE ______________________