Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Proper handling of query results towards maximizing reusability in object-oriented databases
Date
1998-06-01
Author
Alhajj, R
Polat, Faruk
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
50
views
0
downloads
Cite This
Reusability is one of the vital and distinguishing features that lead to the wide acceptance of the object-oriented technology. In this paper, we present a method for placing a given class in its intended position within the hierarchy to maximize reusability. We group classes to be added to the hierarchy into four categories; the classes whose both subclasses and superclasses are known, only subclasses are known, only superclasses are known, or neither subclasses nor superclasses are known. We concentrate on query results to have the object model maintain closure property because reusability is achieved only when the result of a query is properly placed in the hierarchy in an automated way. To enforce closure, we differentiate between operands Object Algebra Expressions (OAEs) hierarchy and class hierarchy and define the mapping from the class hierarchy to the OAEs hierarchy and vice versa. The first mapping shows how a class is used as an operand and the second mapping shows how to reflect a query result into the class hierarchy. We classify classes as base classes and brother classes. Each brother class shares the definition of a base class because a brother class holds the result of a selection. We introduce two algorithms that help in reusability maximization. The first algorithm adjusts the list of superclasses of a given class to increase the inherited facilities and hence decrease locally defined facilities. The second algorithm maximizes reusability by considering the subclasses of each of the superclasses of a given class to have the latter class properly placed in the hierarchy. (C) 1998 Elsevier Science Inc. All rights reserved.
Subject Keywords
Base class
,
Brother class
,
Closure
,
Class hierarchy
,
OAEs hierarchy
,
Reusability
URI
https://hdl.handle.net/11511/39190
Journal
INFORMATION SCIENCES
DOI
https://doi.org/10.1016/s0020-0255(97)10051-2
Collections
Department of Computer Engineering, Article
Suggestions
OpenMETU
Core
Tümleşik Modüler Motor Sürücü Sistemi Tasarımı
Uğur, Mesut; Keysan, Ozan (null; 2017-10-25)
Bu çalışmada, bir Tümleşik Modüler Motor Sürücü (TMMS) sistemi tasarımı gerçekleştirilmiştir. TMMS sistemi için modüler bir kesirli oluklu, konsantre sargılı (FSCW), sabit mıknatıslı senkron motor (PMSM) ile birlikte Galyum Nitrat (GaN) teknolojisine dayalı modüler motor sürücü güç katı tasarımı yapılmıştır. Konvansiyonel sistemlere göre %2’lik verim artışı sağlanmıştır. Tümleşik motor sürücü sistemine uygun DA bara kondansatör seçimi gerçekleştirilmiştir. Interleaving tekniği kullanılarak kondansatör boyut...
Optimal external configuration design of missiles
Tanıl, Çağatay; Platin, Bülent Emre; Department of Mechanical Engineering (2009)
The main area of emphasis in this study is to investigate the methods and technology for aerodynamic configuration sizing of missiles and to develop a software platform in MATLAB® environment as a design tool which has an ability of optimizing the external configuration of missiles for a set of flight requirements specified by the user through a graphical user interface. A genetic algorithm based optimization tool is prepared by MATLAB is expected to help the designer to find out the best external geometry ...
Efficient MOM analysis of printed structures by utilizing characteristic modes
Çetin, Metehan; Alatan, Lale; Department of Electrical and Electronics Engineering (2016)
In recent years, the theory of characteristic modes has been widely used for antenna design purposes. This theory provides physical insight about scattering and radiating properties of conducting bodies. In this thesis work, a MATLAB code is developed for analyzing printed structures by using characteristic mode theory. Characteristic modes of printed structures can be calculated by using the Method of Moments (MoM) matrix corresponding to the structure. To generate the MoM matrix, the electric field integr...
Giriş Kısıtlı Ters Sarkaç Mekanizmasının Optimal Kontrolü
SOVUKLUK, Sait; Ankaralı, Mustafa Mert (2021-08-01)
Rapid developments in today's actuator and sensor technologies have pioneered the development of platforms containing very different actuator and sensor combinations. In order to utilize the potentials of the platforms in the best way, it has become a necessity to develop new methods in control systems and new control methods have begun to be gathered under the name of modern control. The optimal control, which is one of the subtitles of modern control, has started to be used widely today with the increase ...
Effective and Functional Surface Design for Biosensing Applications Based on a Novel Conducting Polymer and PMMA/Clay Nanocomposite
Kesik, Melis; Kocer, Ozgecan; Kanik, Fulya Ekiz; Unlu, Naime Akbasoglu; Rende, Eda; Aslan-Gurel, Evren; Rossi, Rene M.; Udum, Yasemin Arslan; Toppare, Levent Kamil (Wiley, 2013-08-01)
Surface functionalization plays a crucial role in the design of biosensors. For this purpose, a novel functional monomer, 6-(4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2H-benzo[d][1,2,3]triazol-2-yl)hexan-1-amine (BEDOA-6), was designed and synthesized. Poly(BEDOA-6) was utilized as an immobilization matrix for glucose oxidase biosensor construction. Moreover, polymethylmethacrylate (PMMA) layered silicate nanocomposites were prepared by in situ suspension polymerization. Conducting polymer surface w...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
R. Alhajj and F. Polat, “Proper handling of query results towards maximizing reusability in object-oriented databases,”
INFORMATION SCIENCES
, pp. 247–272, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39190.