A new approach in object-oriented methodology for creating event-based simulator

2006 ◽  
Author(s):  
Saeed Aliakbarian ◽  
Ahmad Abdollahzadeh ◽  
Leila Jalali
Keyword(s):  
Object Oriented ◽  
New Approach ◽  
Event Based

scholarly journals Object-Oriented Type Inference

1991 ◽  
Vol 20 (345) ◽  
Author(s):  
Jens Palsberg ◽  
Michael I. Schwartzbach
Keyword(s):  
Fixed Point ◽  
Object Oriented ◽  
Type Inference ◽  
Finite Sets ◽  
New Approach ◽  
Optimizing Compiler ◽  
Point Derivation ◽  
Set Inclusion ◽  
Least Solution ◽  
Type Information

We present a new approach to inferring types in untyped object-oriented programs with inheritance, assignments, and late binding. It guarantees that all messages are understood, annotates the program with type information, allows polymorphic methods, and can be used as the basis of an optimizing compiler. Types are finite sets of classes and subtyping is set inclusion. Using a trace graph, our algorithm constructs a set of conditional type constraints and computes the least solution by least fixed-point derivation.

AN OBJECT-BASED APPROACH TO MANAGING DOMAIN SPECIFIC THESAURI: SEMIAUTOMATIC THESAURUS CONSTRUCTION AND QUERY-BASED BROWSING

2002 ◽  
Vol 12 (04) ◽  
pp. 363-389 ◽  
Author(s):  
JAE HUN CHOI ◽  
JAE DONG YANG ◽  
DONG GILL LEE
Keyword(s):  
Object Oriented ◽  
Domain Expert ◽  
Considerable Part ◽  
New Approach ◽  
Domain Experts ◽  
Domain Specific ◽  
Object Based ◽  
Boolean Queries

In this paper, we propose a new approach for managing domain specific thesauri, where object-oriented paradigm is applied to thesaurus construction and query-based browsing. The approach provides an object-oriented mechanism to assist domain experts in constructing thesauri; it determines a considerable part of relationship degrees between terms by inheritance and supplies the domain expert with information available from other parts of the thesaurus being constructed or already constructed. In addition to that, it enables domain experts to incrementally construct the thesaurus, since the automatically determined relationship degrees can be refined whenever a more sophisticated thesaurus is needed. It may minimize domain experts' burden caused by the exhaustive specification of individual relationship. This approach also provides a query-based browsing facility, which enables users to find desired thesaurus terms without tedious browsing in the thesaurus. A browsing query can be formulated with terms rather ambiguous, yet capable of deriving the desired terms. This browsing query is useful especially when users want precise results. In other words, it is useful when they want to use only thesaurus terms carefully selected in reformulating Boolean queries. To demonstrate the feasibility of our approach, we fully implemented an object-based thesaurus system, which supports the semiautomatic thesaurus construction and the query-based browsing facility.

scholarly journals An Assessment of Maintainability of an Aspect-Oriented System

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Kagiso Mguni ◽  
Yirsaw Ayalew
Keyword(s):  
Software Maintenance ◽  
Structural Complexity ◽  
Object Oriented ◽  
Aspect Oriented Programming ◽  
New Approach ◽  
Crosscutting Concerns ◽  
Aspect Oriented System ◽  
Important Activity ◽  
Oriented System

Software maintenance is an important activity in software development. Some development methodologies such as the object-oriented have contributed in improving maintainability of software. However, crosscutting concerns are still challenges that affect the maintainability of OO software. In this paper, we discuss our case study to assess the extent of maintainability improvement that can be achieved by employing aspect-oriented programming. Aspect-oriented programming (AOP) is a relatively new approach that emphasizes dealing with crosscutting concerns. To demonstrate the maintainability improvement, we refactored a COTS-based system known as OpenBravoPOS using AspectJ and compared its maintainability with the original OO version. We used both structural complexity and concern level metrics. Our results show an improvement of maintainability in the AOP version of OpenBravoPOS.

Test Focus Selection for Integration Testing

2017 ◽  
Vol 27 (08) ◽  
pp. 1145-1166
Author(s):  
Shadi Banitaan ◽  
Kendall E. Nygard ◽  
Kenneth Magel
Keyword(s):  
Object Oriented ◽  
Experimental Results ◽  
Software Systems ◽  
Budget Constraints ◽  
Unit Testing ◽  
Software System ◽  
Integration Testing ◽  
System Testing ◽  
New Approach ◽  
Selection For

Object-oriented software systems contain large number of modules which make unit testing, integration testing, and system testing very difficult and challenging. While the aim of unit testing is to show that individual modules are working properly and the aim of the system testing is to determine whether the whole system meets its specifications, the aim of integration testing is to uncover errors in the interactions between system modules. However, it is generally impossible to test all connections between modules because of time and budget constraints. Thus, it is important to focus the testing on the connections presumed to be more error-prone. The goal of this work is to guide software testers where in a software system to focus when performing integration testing to save time and resources. This paper proposes a new approach to predict and rank error-prone connections. We use method level metrics that capture both dependencies and internal complexity of methods. We performed experiments on several Java applications and used error seeding techniques for evaluation. The experimental results showed that our approach is effective for selecting the test focus in integration testing.

A new approach towards an object-oriented database system

1989 ◽  
Vol 27 (1-5) ◽  
pp. 127-132 ◽  
Author(s):  
S. Goutas ◽  
P. Soupos ◽  
D. Christodoulakis
Keyword(s):  
Object Oriented ◽  
Database System ◽  
New Approach ◽  
Object Oriented Database

Characterizing Users' Visual Analytic Activity for Insight Provenance

2009 ◽  
Vol 8 (1) ◽  
pp. 42-55 ◽  
Author(s):  
David Gotz ◽  
Michelle X. Zhou
Keyword(s):  
Visual Analytics ◽  
Building Blocks ◽  
Historical Record ◽  
Essential Requirement ◽  
New Approach ◽  
Fundamental Limitations ◽  
Semantic Building Blocks ◽  
Multiple Levels ◽  
Event Based ◽  
Behavior Types

Insight provenance – a historical record of the process and rationale by which an insight is derived – is an essential requirement in many visual analytics applications. Although work in this area has relied on either manually recorded provenance (for example, user notes) or automatically recorded event-based insight provenance (for example, clicks, drags and key-presses), both approaches have fundamental limitations. Our aim is to develop a new approach that combines the benefits of both approaches while avoiding their deficiencies. Toward this goal, we characterize users' visual analytic activity at multiple levels of granularity. Moreover, we identify a critical level of abstraction, Actions, that can be used to represent visual analytic activity with a set of general but semantically meaningful behavior types. In turn, the action types can be used as the semantic building blocks for insight provenance. We present a catalog of common actions identified through observations of several different visual analytic systems. In addition, we define a taxonomy to categorize actions into three major classes based on their semantic intent. The concept of actions has been integrated into our lab's prototype visual analytic system, HARVEST, as the basis for its insight provenance capabilities.

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