Practical experiences with TTP schemes

This article is based on a range of practical experiences with TTPs carried out in a variety of international studies. The article helps to explain how TTPs might operate in practice, and how the TTP security service can be provided.Peter is an internationally respected expert in security and EDI and has participated in many studies and workgroups around the world.     

Practical network security: experiences with ntop

As networks become large and heterogeneous, network administrators need efficient tools for monitoring network activities and enforcing global security. In open environments such as universities and research organisations, it is rather difficult to prevent access to core network resources without restricting users’ freedom.Ntop is an open-source web-based traffic measurement and monitoring application written by the authors and widely available on the Internet. This paper shows how ntop can also be effectively used for network security as it is able to identify potential intruders and security flaws, as well as discover misconfigured or faulty applications that generate suspicious traffic.     

Design applications of the MIDAS graphics system

midas is a versatile system of fortran-callable subroutines developed for the modular design and device-independent display of two- and three-dimensional graphics compositions. The system is primarily oriented toward applications involving the definition and spatial transformation of three-dimensional line drawings. The graphics generated by midas consist of three-dimensional line segments mapped onto any graphics device with vector-drawing capabilities.This paper presents an application of midas in architectural and civil engineering design. A fortran monitor program has been written to provide a concise command structure for planar design and display. This command structure allows the user to interactively build, transform, store, retrieve, and display three-dimensional planar compositions. Output displays may optionally have hidden lines removed. An example structure (the University of Colorado Computing Center) is modularly designed, edited, and displayed. Finally, a discussion of the advantages and shortcomings of midas as a design tool is given along with suggestions for further improvement of the system.     

Imaginal and emotional experiences in pleasure-oriented IT usage: A hedonic consumption perspective

Based on the marketing theory of hedonic consumption, this study examines the effects of six types of imaginal and emotional experiences on using pleasure-oriented IT. Associated hypotheses are tested using questionnaire responses from 443 online game players. The results provide strong support for the major hypotheses and indicate that the determinants of behavior may differ in using pleasure-oriented versus productivity-oriented IT. This paper contributes not only to the application of a marketing theory to IS research, but also to improved understanding of using pleasure-oriented IT and of why people use technologies that are not particularly useful from a productivity standpoint.     

MIDAS技术在移动设计业务中的应用

随着移动通信的飞速发展,其规划设计过程中所需数据日趋庞大,因此,建立移动规划设计数据库来收集、整理所需数据成为必然。该文介绍了用MIDAS技术进行三层数据库系统开发的方法,并将其应用到规划设计数据库中,这使移动通信设计的效率得到了提高。     

Practical experiences in modelling software engineering practices: The project patterns approach

Software process improvement in software development organisations is a complex task that can be solved using knowledge management strategies. In this area, the definition and use of process patterns are a proven approach to apply knowledge management strategies in software engineering organisations. One of the main problems for the effective application of process patterns in the software industry is the difficulty of formalising the knowledge about the development process using these approaches. This study presents a framework to manage software project patterns. This framework (which is composed of a metamodel and a platform for patterns modelling and reuse) is able to formalise the knowledge on software development projects including software engineers’ previous experience, development methodologies, references frameworks and lessons learnt. The authors carried out an empirical study at Carlos III University of Madrid, where junior software engineers used the project patterns defined in this research work. The evidences and findings obtained during the empirical study execution indicates that correctness of the pattern depends on relevance of the bibliographic references used to create it, implementation of a knowledge sharing strategy among the personnel involved and previous experience in the business areas related to the information systems being developed. The results obtained from the empirical study also envisage that the usefulness of an sdPP (Software Development Project Pattern) depends on the ease of identifying when and how to apply a specific sdPP in a software project.     

Practical experiences of applying source-level WCET flow analysis to industrial code

Code-level timing analysis, such as worst-case execution time (WCET) analysis, usually takes place at the binary level. However, many program properties that are important for the analysis, such as constraints on possible program flows, are easier to derive at the source code level since this code contains much more information. Therefore, various source-level analyses can provide valuable support for timing analysis. However, source-level analysis is not always smoothly applicable in industrial settings. In this paper, we report on the experiences of applying source-level analysis to industrial code in the ALL-TIMES project: the promises, the pitfalls, and the workarounds that were developed. We also discuss various approaches to how the difficulties that were encountered can be tackled.     

MIDAS应用在CORBA环境下实现的原理与方法

分析TMIDAS在DCOM环境下的工作机制,论述了其在CORBA环境下的应用原理,提出了在CORBA环境下的实现方法,并给出了关键部分的实现和程序流程。     

MIDAS技术研究及其应用

该文指出了传统双层C/S结构的不足之处,介绍了MIDAS技术以及基于MIDAS技术进行三层数据库开发的方法,并应用到高校专家库与重点实验室管理信息系统项目的开发中,提高了系统的可扩展性、稳定性和效率。     

Expert systems as tools for the explanation of the legal domain: The ARPO experiences

The necessity of having explanations of the knowledge used by professionals, such as the jurists, who are not accustomed to using formal languages, makes it necessary to develop strategies for capturing and storing knowledge with computers. This action eventually needs to work in special programs using standard resources. This is made in the program ARPO, using an expert system in order to explain the jurist's knowledge. The paper speaks about the steps made in this sense from the experiences of ARPO.     

基于MIDAS的DAX网络发布技术在油田WebGIS中的应用研究

提出了基于MIDAS的DAX网络发布技术在WebGIS中的设计方法。该方法是一个共享的中间层上封装了商业规则，集中的实现了应用服务器所要实现的功能，使客户程序将重点放在显示数据和与用户交互上，将这项技术应用于油田中的地质图绘制方面，解决了油田中多层分布构数据库的访问，管理和地质图件的动态生成问题，研制开发的“基于WebGIS地质图绘制软件包”在大庆油田推广使用。取得了良好的效果。     

Practical aspects and experiences Scalable massively parallel algorithms for computational nanoelectronics

There is at present a worldwide effort to overcome the technological barriers to nanoelectronics. Microscopic simulation can significantly enhance our understanding of the physics of nanoscale structures, and constitutes a valuable tool for designing nanoelectronic functional devices. In nanodevices, novel physics effects are used to attain logic functionality which conventional technology can not achieve. Therefore it is necessary to develop quantum-transport simulation methods which include novel physical effects. Moreover, simulation of realistic nanodevices require enormous computing resource, necessitating parallel supercomputing. In this paper, we present massively parallel algorithms for simulating large-scale nanoelectronic networks based on the single-electron tunneling effect, which is arguably the quantum effect of greatest significance to nanoelectronic technology. A MIMD implementation of our simulation algorithm is carried out on a 64-processor nCUBE 2, and a SIMD implementation is carried out on a 16,384-processor MasPar MP-1. By exploiting massive parallelism, both parallel implementations achieve very high parallel efficiency and nearly linear scalability. The result of this work is that we are able to simulate large-scale nanoelectronic network, within a reasonable time period, which would be impractical on conventional workstations.     

基于MIDAS的分布式多层系统远程调用方式的研究

介绍了多层分布式结构的概念,分析了影响多层分布式应用系统执行效率的关键因素,剖析了基于MIDAS技术的三种远程调用方式的执行效率,并通过验证程序给出了相应的实验结果。     

A domain model of Web recommender systems based on usage mining and collaborative filtering

Considering the increasing demand of multi-agent systems, the practice of software reuse is essential to the development of such systems. Multi-agent domain engineering is a process for the construction of domain-specific agent-based reusable software artifacts, like domain models, representing the requirements of a family of multi-agent systems in a domain, and frameworks, implementing reusable agent-based design solutions to those requirements. This article describes the domain modeling tasks of the MADEM methodology and a case study on the application of GRAMO, a MADEM technique, for the construction of the domain model of ONTOWUM, specifying the common and variable requirements of a family of Web recommender systems based on usage mining and collaborative filtering.     

基于MIDAS技术的多层数据库应用

首先指出传统的双层应用系统的效率、延展性、稳定性等结构在数据库方面的不足；然后介绍了MIDAS技术及其优点以及基于MIDAS技术进行多层数据库开发的方法；最后阐述了该方法在专家库与重点实验室管理信息系统中的开发应用。     

MIDAS技术的实现与可靠性分析

MIDAS为开发多层分布式应用系统提供的一个中间透明引擎,能有效地利用D COM、TCP/IP等技术在Internet/Intranet上建立结构为"瘦客户端+应用程序服务器+数据库系统"的多层分布式应用程序,在此结构下可利用对象代理实现分布式负载均衡与容错,从而提高系统的性能.     

基于EAserver的多层分布式Web技术的企业MIS系统解决方案

针对传统C／S模式中存在的缺点，提出了采用基于数据窗口技术和Jaguar组件技术的多层分式Web技术来构建现代企业之间安全、高效的信息管理平台的方案。该技术为企业开发基于中间件的分布式Web应用奠定了坚实的基础。     

基于MIDAS模式的供电局收费系统的设计

本文详细介绍了基于ＭＩＤＡＳ模式的供电局电力收费系统的设计和实现。