对我国新型墙材发展道路的探讨

该文提出我国新型墙体材料的发展趋势呈生态化、本土化和集约化等特点,并对目前我国发展新型墙体材料所面临的挑战进行了探讨。     

Some Key Figures in London's Regeneration

A number of powerful individuals have played a significant role promoting regeneration in London. Peter Murray describes some of those who make up this important network of politicians, civil servants, planners and developers. Copyright © 2012 John Wiley & Sons, Ltd.     

成人失禁用吸收性产品的机遇与挑战

主要介绍了成人失禁问题的流行趋势、失禁症状的诊断和分类，论述了成人失禁用吸收性产品的发展和所面对的挑战。     

Growth capacity of Listeria monocytogenes in ingredients of ready-to-eat salads

Raw minimally processed vegetables and fruits as well as boiled pasta and potato are the main ingredients of ready-to-eat (RTE) salads. These ingredients are diverse in their ability to support growth of Listeria monocytogenes. The objective of this study was to determine to what extent different ingredients can contribute to growth of L. monocytogenes in RTE salads. This was done by assessing the growth capacity of L. monocytogenes in ingredients of RTE salads by means of challenge tests and determination of the effect of product characteristics and presence of competitive flora. The majority of the tested products did not support or hardly supported growth of L. monocytogenes. The calculated maximum increase of 3.4 log CFU/g was exceeded in Galia melon, potato and pasta products. In RTE dinner salads, growth of L. monocytogenes was supported by the carbohydrate component. Galia melon, which is often used as ingredient of fruit salads, can contribute to growth of L. monocytogenes in these products. Growth inhibition, or differences in relative increase, could not always be explained by a_w, pH or presence of competitive flora. The effect of competitive flora, especially lactic acid bacteria, on growth inhibition was observed in non-pasteurized potato, white cabbage and mango.     

Challenge-based collaborative intrusion detection in software-defined networking: an evaluation

Software-Defined Networking (SDN) is an emerging architecture that enables a computer network to be intelligently and centrally controlled via software applications. It can help manage the whole network environment in a consistent and holistic way, without the need of understanding the underlying network structure. At present, SDN may face many challenges like insider attacks, i.e., the centralized control plane would be attacked by malicious underlying devices and switches. To protect the security of SDN, effective detection approaches are indispensable. In the literature, challenge-based Collaborative Intrusion Detection Networks (CIDNs) are an effective detection framework in identifying malicious nodes. It calculates the nodes’ reputation and detects a malicious node by sending out a special message called a challenge. In this work, we devise a challenge-based CIDN in SDN and measure its performance against malicious internal nodes. Our results demonstrate that such a mechanism can be effective in SDN environments.     

智能控制的机遇与挑战

智能控制的机遇与挑战并存，深入研究了智能控制系统的建模和表达方式以及在传统和智能控制间的建桥等问题，可望为其开发工作提供合理的工程方法。     

Migration Pattern Process

Within the international community architects are regularly typecast as exporters of predetermined solutions, rarely given the opportunity to respond appropriately, sensitively and effectively to specific and real emergencies. At the core of any impact are people like you and I; their welfare and successful healing creates a catalyst for the community to rebuild lives and esteem. Since 2007, Diploma Unit 7 at the Architectural Association in London, led by Simon Beames and Kenneth Fraser , has been researching the philosophical, social, political, economic and technical response to long-term humanitarian relief and the resocialisation of displaced people and damaged communities in conditions of extreme hardship. Copyright © 2009 John Wiley & Sons, Ltd.     

阿拉伯世界的因特网

因特网正在改变着人们的传统商务方式（例如电子商务）和交往方式（例如电子邮件、网上聊天），并为信息交流提供了极大的方便。许多国家开始认识到因特网的这些益处，急切地想建设成为电子社会，阿拉伯世界也不例外，随着通信世界的融合，话音、数据、文本和视像多个网络并存的局面将不复存在。的网络将综合为一个，从目前的趋势来将会是IP网，这向电路交换电话网提出了商业挑战。与此同时，因特网的兴起在竞争、许可证和普遍服务方面提出了重要的政策和管制问题。     

一个CHAP认证协议的改进方案

对CHAP(Chaaenge Handshake Authentication Protocol)协议进行阐述和安全性分析,针对其存在服务器欺骗、插入信道攻击等安全缺陷,提出了一个改进方案。最后分析了新协议对一些常见攻击表现出的安全性能。     

网络文化对高校思想教育的挑战

网络文化使高校思想教育被“边缘化” ,网络文化对高校思想教育的挑战包括对高校思想教育者的挑战 ,对思想教育对象的挑战 ,对思想教育内容的挑战 ,对思想教育方法的挑战。