Habituation effects in computer security warning

Security warning is a form of computer dialog communication used to inform the users on the risks of allowing random applications to run on a computer system. Accordingly, it is specifically designed to impersonate a legitimate security alerting function (e.g., notify, warn, and advice) to a user about the consequence effect of an action. However, most of the computer users tend to ignore those security warnings conveying the same message over and over again. This eventually leads to habituation. Considering the fact that there is a significant lack of focus paid to address this issue, the main objective of this article is to describe and summarize the related studies on users’ habituation to the security warnings. This article presents a systematic literature review to explore the current key issues, challenges, and the possible solutions related to habituation effects in security warnings. It is expected that this article could contribute to a more complete understanding of the habituation effects in security warnings and eventually bring benefits to the research communities or general publics.     

社交照片隐私保护机制研究进展

照片分享服务已经广泛渗透到人们生活的各个角落,这种新型服务模式及应用给人们带来便利的同时无形中泄露了用户的隐私信息,而照片分享平台上数量激增的社交照片和多样化的用户需求给隐私保护带来了更大挑战。结合国内外相关最新研究趋势,对社交网络中的照片隐私保护问题进行研究展望。首先介绍基于全生命周期的社交照片隐私保护模型、照片隐私信息分类、照片隐私保护动机和攻击者模型,以及所面临的隐私威胁;其次从社交照片生成与感知、发布与交换、存储与销毁、融合与分析4个环节介绍了其隐私保护机制研究现状;最后展望了该领域的未来研究方向。     

Global stabilisation for a class of switched high-order stochastic nonlinear systems

This paper is devoted to the problem of global stabili sation for a class of switched high-order stochastic nonlinear systems under arbitrary switchings. By extending the adding -a -power -integrator technique and choosing an appropriate common Lyapunov function, a common state-feedback controller is explicitly constructed to render the closed-loop system globally asymptotically stable in probability. The effectiveness of the proposed approach is demonstrated by a simulation example.     

加氢脱硫废催化剂综合利用研究

提出了石油精炼过程中产生的加氢脱硫镍-钼-铝系废催化剂的湿法全回收新工艺路线和工艺条件。研究了分离废催化剂中的钒、钼、镍、铝等有价金属的原理及技术特点。实验结果：n（碳酸钠）／（钼＋钒）：1．5，加入适量的添加剂，粉碎至≤180μm，700℃焙烧2h，用热水浸取，Mo和V的浸出率可达90％以上。     

Facile synthesis, high thermal stability, and unique optical properties of hyperbranched polyarylenes

New hyperbranched polyarylenes of high molecular weights are synthesized in high yields by copolycyclotrimerizations of diynes 1,4-diethynylbenzene, 4,4′-diethynylbiphenyl, 2,7-diethynylfluorene and 2,5-diethynylthiophene with monoynes 1-heptyne, 1-octyne and 1-dodecyne catalyzed by TaCl₅-Ph₄Sn in toluene. All the polymers show good solubility in common organic solvents, possess excellent thermal stability, and emit strong deep-blue lights of ∼400 nm with quantum efficiencies up to 98%. The polyarylenes effectively limit 532 nm lasers light, some of which show optical limiting performances superior to that of C₆₀, a well-known optical limiter.     

微波作用下的结晶过程分析

通过微波和加热恒温作用下的硫酸钙结晶实验对照 ,从结晶速率、晶习、粒度分布和组成等方面分析了微波场对结晶过程的影响     

Soil Microvariation as a Source of Variability in the Wild: The Case of Secondary Metabolism in <Emphasis Type="Italic">Origanum dayi</Emphasis> Post

The volatile components of Origanum dayi Post were analyzed in 10 wild populations grown in a limited area. ANOVA tests showed no significant differences among the compositions of plants that grew in different locations, which suggests that differences in composition are of genetic origin and do not spring from environmental variation. However, the use of new statistical methods (such as use of the correlation coefficient, r, as a parametric value) revealed that, despite their reduced range of variation, most of the 22 soil properties (SPs) measured correlated with the composition of the volatile components. This analysis also indicated that the main volatile components were modified in parallel in response to SP variations. It is concluded that variations in soil properties affected the composition of volatile components in O. dayi, and that the main influencing factors were soil microelement contents and texture. This study highlights the need for highly sensitive statistical tools to determine the actual influence of environmental factors in natural environments, especially when their range of variation is small.     

C10芳烃的开发利用

Ｃ１０芳芳烃资源集中，用途广泛，蕴茂着巨大经济效益。Ｃ１０芳烃的开发已引起国内外的重视。本文重点概述了国内我生产技术和今后发展趋势，以及Ｃ１０芳烃综合利用的经济效益，为Ｃ１０芳烃的开发利用提供可参考的意见。     

T-ZnO晶须增强环氧树脂复合材料的抗静电性

研究了T—ZnO晶须增强环氧树脂复合材料的抗静电性。结果表明：具有半导体性的T—ZnO晶须在复合材料中，相互搭接形成导电通路，以价带传导方式传导电荷，而起抗静电作用，使环氧树脂材料的体积电阻率降低了8个数量级，用比表面因子修正了网络形成临界体积分数模型。T—ZnO晶须的网络形成临界体积分数(0．057)是球形粒子的网络形成临界体积分数(0．38)的1／10。     

乙醇-水体系渗透汽化分离过程的影响因素

为了考察乙醇-水体系渗透汽化实验中影响因素对亲水性PAA-Al2O3复合膜分离性能的影响,采用中心组合旋转设计方法设计实验,以渗透通量和选择性为实验响应,建立了以接枝丙烯酸单体浓度、操作温度和料液浓度为变量的回归模型方程.通过回归模型的分析,发现在乙醇-水渗透汽化脱水实验过程中,对渗透通量影响最明显的是操作温度,其次是料液浓度;对选择性影响最明显的则是操作温度与料液浓度间的交互作用,其次是接枝丙烯酸单体浓度.为了对乙醇-水体系的渗透通量和选择性进行优化,运用满意度函数方法分析了回归模型方程.结果表明,料液浓度为95％(wt)的乙醇-水共沸混合物的优化条件为接枝丙烯酸单体浓度为8％(wt)和操作温度为55.9℃,其总体满意度函数值为0.50,优化结果是令人满意的.