物件導向軟體之架構(Object-Oriented Software Construction)探討

The paper introduces OMNeT++, a C++-based discrete event simulation package primarily targeted at simulating computer networks and other distributed systems. OMNeT++ is fully programmable and modular, and it was designed from the ground up to support modeling very large networks built from reusable model components. Large emphasis was placed also on easy traceability and debuggability of simulation models: one can execute the simulation under a powerful graphical user interface, which makes the internals of a simulation model fully visible to the person running the simulation: it displays the network graphics, animates the message flow and lets the user peek into objects and variables within the model. These features make OMNeT++ a good candidate for both research and educational purposes. The OMNeT++ simulation engine can be easily embedded into larger applications. OMNeT++ is opensource, free for non-profit use, and it has a fairly large user

The omnet++ discrete event simulation system

This ebook is the first authorized digital version of Kernighan and Ritchie's 1988 classic, The C Programming Language (2nd Ed.). One of the best-selling programming books published in the last fifty years, "K&R" has been called everything from the "bible" to "a landmark in computer science" and it has influenced generations of programmers. Available now for all leading ebook platforms, this concise and beautifully written text is a "must-have" reference for every serious programmers digital library.

As modestly described by the authors in the Preface to the First Edition, this "is not an introductory programming manual; it assumes some familiarity with basic programming concepts like variables, assignment statements, loops, and functions. Nonetheless, a novice programmer should be able to read along and pick up the language, although access to a more knowledgeable colleague will help."

The C programming language

http://www.workflowpatterns.com/documentation/documents/yawl_qut_report_FIT-TR-2002-06.pdf

YAWL: yet another workflow language

This review describes a body of work on computational immune systems that behave analogously to the natural immune system. These artificial immune systems (AIS) simulate the behavior of the natural immune system and in some cases have been used to solve practical engineering problems such as computer security. AIS have several strengths that can complement wet lab immunology. It is easier to conduct simulation experiments and to vary experimental conditions, for example, to rule out hypotheses; it is easier to isolate a single mechanism to test hypotheses about how it functions; agent-based models of the immune system can integrate data from several different experiments into a single in silico experimental system.

Computer immunology

Arjuna is an object-oriented programming system implemented entirely in C++, that provides a set of tools for the construction of fault-tolerant distributed applications. Arjuna exploits features found in most object-oriented languages (such as inheritance) and only requires a limited set of system capabilities commonly found in conventional operating systems. Arjuna provides the programmer with classes that implement atomic transations, object level recovery, concurrency control and persistence. These facilities can be overridden by the programmer as the needs of the application dictate. Distribution of an Arjuna application is handled using stub generation techniques that operate on the original C++ class headers normally used by the standard compiler. The system is portable, modular and flexible. The paper presents the design and implementaion details of Arjuna and takes a retrospective look at the system based on the application building experience of users.

/pdf/the-design-and-implementation-of-arjuna-4f9kctyvz6.pdf

The Design and Implementation of Arjuna

Helping to realize the full potential of e-commerce.

Transactions and Web services

One of most serious problems plaguing the World Wide Web today is that of broken hypertext links, which are a major annoyance to browsing users and also a cause of tarnished reputation and possible loss of opportunity for information providers. The root of the problem lies in the current Web architecture's lack of support for referential integrity. This paper presents a model for the provision of referential integrity for Web resources which supports resource migration and tolerates site and communication failures. The approach is object-oriented, highly flexible, completely distributed, and does not require any global administration. An attractive feature of our design is the provision of a lightweight mechanism which provides referential integrity, and which may be customised on a per resource basis to provide increased fault-tolerance and performance. Our system follows an evolutionary approach, supporting parallel operation with the existing Web, allowing users to gain the additional benefits of referential integrity while allowing continued access through trusted software components.

/pdf/fixing-the-broken-link-problem-the-w3objects-approach-1bdvdjsboe.pdf

Fixing the “broken-link” problem: the W3Objects approach

Construction and Use of a Simulation Package in C

Data is divided into a plurality of blocks. A unique identifier is assigned to each of the plurality of blocks. A key is generated that identifies how to reconstruct the data from the plurality of blocks. The key and each of the plurality of blocks are transmitted to a recipient.

Mark Cameron Little

Papers

The Design and Implementation of Arjuna

Transactions and Web services

Fixing the “broken-link” problem: the W3Objects approach

Construction and Use of a Simulation Package in C

Secure message transport using message segmentation