一种基于计算机取证的信息一致性方案

计算机数据自身的脆弱性,使计算机取证信息的一致性问题成为计算机证据鉴定过程中的关键所在。该文在计算机取证的基础上,运用DSA签名机制,提出了一种证明计算机证据完整性的一致性方案。该方案能够在计算机系统运行过程中,实时、安全地转移所获取的取证信息,并进行证据固定,以保证其完整性。在基于某些密码学假设的前提下,证明了方案的安全性。     

浅谈计算机网络安全管理的措施

随着近些年来计算机网络技术的迅猛发展,计算机网络安全管理也越来越受到重视。计算机网络安全主要是以网络管理控制和技术措施来确保数据信息的完整性和保密性。     

谈计算机网络安全管理的一些技术与方法

计算机网络安全是指利用网络管理控制和技术措施,保证数据的保密性、可使用性和完整性在网络环境下受到保护。计算机的网络安全是指计算机逻辑的安全和物理安全。计算机逻辑的安全是指计算机上的信息完整、可用和保密。计算机物理安全是指计算机系统设备和相关的设施不受破坏和丢失。     

基于多线程的监控终端设备完整性验证研究

为提高数据中心机房监控终端设备的安全性,提出一种基于多线程设备完整性验证方法。采用多线程方式并行采集数据中心机房监控终端数据及验证其完整性,并设计客户端界面进行显示和交互。应用表明,该完整性验证方法能提高验证效率。     

Assessing the computer attitudes of students: An Asian perspective

Research has found that computer attitudes play a key role in influencing the extent to which students accept the computer as a learning tool and in determining the likelihood that computer will be used in the future for learning and study. A sample of 183 students reported their computer attitudes using a Likert-type questionnaire with three subscales, computer importance, computer enjoyment, and computer anxiety. One-way MANOVA revealed no significant differences in computer attitudes by gender although male students reported more positive towards the computer than female students. There were significant differences between students who own computers at home and those who do not and students who own a computer at home also reported a lower level of computer anxiety compared to those who do not.     

Computer phobia and computer self-efficacy: their association with undergraduates’ use of university computer facilities

Extensive development in universities’ provision of computer facilities may have negative consequences for students prone to computer avoidance. In the present study, undergraduates (N = 363) completed self-report measures on computer phobia and self-efficacy. Results demonstrate that many students follow previous trends by continuing to report levels of computer phobia within the higher parameters of self-report measures. Students who reported either high computer phobia or low computer self-efficacy were less likely to maximise their use of university computer facilities. Moreover, a range of background measures – initial computer experience, regular home use, successful completion of a computer course and introductory tutor’s characteristics – all impacted statistically on self-report responses. Results are discussed with reference to the increasing responsibility placed on students to acquire ICT skills.     

计算机机房管理中的虚拟机技术

通过在计算机上安装虚拟机软件Virtual PC,使用这种虚拟机技术,可以消除学生上机实习操作内容多样性和机房安全管理稳定性之间的矛盾,不需要再对学生上机进行过多的限制,给学生营造一个宽松的学习环境,从而提高了学生计算机操作和应用能力.虚拟机技术值得在各类学校计算机教学实习和机房管理中大力推广使用.     

计算机网络安全与防范策略研究

由于计算机网络在不断的发展,人类逐渐出现全球化和信息化发展的趋势。但是。因为计算机网络的联结形式存在多样性特点,终端分布又不均匀,网络自身开放性和互连性的特征,产生了很多黑客、怪客或者恶意软件以及其他不轨攻击等,因此网络信息的安全保证和保密性成为目前信息化发展的一个重要问题。无论在局域网又或者在广域网之中,始终都存在着认为以及自然等很多因素的潜在威胁。所以,计算机网络安全的防范措施就是要全方位地解决各种不同的潜在威胁,这样才能实现计算机网络信息的可用性、保密性和完整性。本文通过分析计算机网络安全受到的威胁因素,研究分析得出防范措施,以供参考。     

计算机技术在网络经济中的应用

近年来,计算机网络技术的发展已成为经济发展研究的热门课题之一,对计算机网络与经济时代的发展关系进行了系统概述。通过列举的方法阐述了计算机技术在经济中的灵活运用以及所取得的成果,并提出了计算机技术在网络经济发展中能更好发挥其作用的有效方法,总结了社会经济的发展现状,并展望了未来计算机技术将更好地为经济服务。     

The dual nature of prior computer experience: More is not necessarily better for technology acceptance

It is often presumed that individuals with greater computer experience will easily adopt new or updated replacements of existing information technology. To examine this assumption, this study reviews prior computer experience research, identifies two key dimensions of computer experience i.e. computer use and computer proficiency and evaluates their effects individually. Analysis of survey data from 737 respondents using structural equation modeling indicates that each dimension had differential effects on behavioral intentions to use a newly introduced internet-based technology with computer use having curvilinear effects on adoption intentions. Implications for research and practice are discussed.     

Computer experience and computer anxiety

In this article two studies are reported that tested the nature of the relationship between computer experience and computer anxiety. In the first study 184 first year psychology students were given a questionnaire that measured their computer experience in terms of e.g. breadth of experience, hours spent on working with computers, skills level, the nature of the first computer experience and the occurrence of computer anxiety. A combined latent-factor path model depicting the relationship between experience and anxiety was construed and tested by means of EQS. The model in which computer experience unidirectionally influenced computer anxiety showed a reasonable fit (CFI=0.91). Two other models were also tested. The model in which experience was a consequence of anxiety in terms of physical arousal and affect and the reciprocal model showed insufficient fit (CFI=0.79 and 0.86). A second study among 225 first and third year psychology students was done to see if the original model could be improved upon. Adding the variables “sex” and “necessity of use of computers” into the model improved the fit of the model (CFI=0.93); it was also found that the amount of control felt during the first experience raised levels of feeling computer literate and liking the computer.     

Computer anxiety in individuals with serious mental illness

This study was designed to compare computer anxiety in individuals with severe mental illness to a normative college sample and to examine whether computer training would be effective in reducing computer anxiety in individuals with severe mental illnesses. The Computer Anxiety Rating Scale (CARS) was used to assess the self-reported computer anxiety of 30 individuals with severe psychiatric disorders enrolled in computer training at a mental health facility's employment training center. The CARS was administered prior to training, after 1 month of training, and after 3 months. Anxiety levels before computer training began were compared to the computer anxiety levels of 35 community college students enrolled in a course providing similar computer training. The individuals with severe mental illness were found to have significantly higher initial computer anxiety scores than the comparison group. Computer anxiety was not significantly reduced by the computer training in either group.     

Computer optimization of refrigeration systems in a textile plant: A case history

A process computer was installed in a large integrated nylon plant in 1976. This dedicated chilled water management system was designed to optimize the operation of chillers and to reduce their energy costs. The computer system was also configured to provide maximum visibility of the operating parameters, machine efficiencies, instrumentation integrity checks, historical data, and energy usage accounting. This paper describes details of the control and optimization strategies, including the overall benefits of the system based on five years of successful operating experience.     

Computer anxiety and anger: the impact of computer use, computer experience, and self-efficacy beliefs

Past research has demonstrated that the level of computer experience users have is the most valuable predictor in whether or not they will suffer computer anxiety symptoms, but this was not the case in the present study. No research was found which examined the correlates of computer anger symptoms. In the current study, the relationship between the computer use (frequency and duration), computer experience, and self-efficacy beliefs of users were analyzed as predictors for computer anxiety and anger symptoms. Questionnaire data from a sample of 242 university students were analyzed. The results indicated that computer self-efficacy beliefs, not computer experience or use, had the largest significant relationship with both computer anxiety, and anger. It is suggested that self-efficacy beliefs be increased so that users may experience lower levels of anxiety and anger. These findings are contrary to the trend of training computer users in specific computer domains. As computer anxiety and anger are negative psychological “states”, an immediate method to deal with these negative emotions should be developed. One possibility that is explored is the application of computer-based therapy that can be used while a user is experiencing negative emotional symptoms.     

浅谈计算机病毒与防治

计算机网络的建设和发展，对整个社会产生了巨大的推动和冲击同时，也给网络的安全运行带来诸多的挑战。而影响计算机网络系统的安全运行因素主要来自计算机病毒的攻击。因此，研究计算机病毒与防治就显得很有现实意义。本文将从计算机病毒的研究背景、计算机病毒的定义、特征、类型以及防治方面进行简单的分析和探讨。     

Computer use and the gender gap: The issue of access, use, motivation, and performance

Since the beginning of computerization, it has been of interest whether there are differential effects on computer behavior, in particular in terms of computer access, computer use, and motivational variables, such as computer self-efficacy. The current research addresses the questions if the gender-related differences in this respect persist to the present day and if there is also a difference in actual performance characteristics. A sample of 48 university students (23 male) was administered a technology self-efficacy questionnaire, a survey on computer access, recorded a user diary, and turned in a computer task. Results show that the gender gap is closing as far as computer access and self-efficacy are concerned. Also, female and male students report comparable amounts of computer usage for their studies. User behavior appears to be gender-specific as males spend more time at the computer for personal purposes. There is also some evidence that male students outperform female students at a computer task (remastering of Power-Point slides). Conclusions for creating computer-based learning environments are discussed.     

Office workers' computer use patterns are associated with workplace stressors

This field study examined associations between workplace stressors and office workers' computer use patterns. We collected keyboard and mouse activities of 93 office workers (68F, 25M) for approximately two work weeks. Linear regression analyses examined the associations between self-reported effort, reward, overcommitment, and perceived stress and software-recorded computer use duration, number of short and long computer breaks, and pace of input device usage. Daily duration of computer use was, on average, 30 min longer for workers with high compared to low levels of overcommitment and perceived stress. The number of short computer breaks (30 s–5 min long) was approximately 20% lower for those with high compared to low effort and for those with low compared to high reward. These outcomes support the hypothesis that office workers' computer use patterns vary across individuals with different levels of workplace stressors.     

Comparing attitudes towards computer usage by undergraduates from 1986 to 2005

The importance and use of computers has increased dramatically over the last two decades. The Attitudes Towards Computer Usage Scale (ATCUS) was developed in 1986 [Popovich, P. M., Hyde, K. R., Zakrajsek, T., & Blumer, C. (1987). The development of the attitudes toward computer usage scale. Educational and Psychological Measurement, 47, 261–269.] and used in a variety of settings over the years. In order to examine how computer attitudes have changed from 1986 to 2005, the ATCUS was given to 254 male and female current undergraduate students. When comparing the 1986 with 2005 results, the amount of time spent using a computer was still positively related to computer attitudes; however, the number of college computer courses was not. There is no longer a significant relationship among any of the factors with college computer courses. Males and females no longer significantly differ in their attitudes toward computers, number of college computer courses, amount of time spent using computers, or degree of self-reported computer anxiety. Implications are discussed.     

Computer training, frequency of usage and burnout: the moderating role of computer self-efficacy

The main aim of this paper is to test the moderating role of computer self-efficacy in the relationship among computer training, frequency of usage and burnout (i.e. exhaustion and cynicism). The sample was made up of 140 workers using computer-aided technology in their jobs. Hierarchical multiple regression analyses were carried out. Results show that frequency of usage and computer training are positively associated with computer self-efficacy. Futhermore, we found interaction effects between computer training×computer self-efficacy on both indicators of burnout as outcomes. Computer self-efficacy moderated the relationship between computer training and burnout. Limitations of the study and practical implications of these findings are discussed.     

关于计算机基础的教学与考试

计算机等级考试是全国性的、非计算机专业人员的大型考试,是为人才流动提供其计算机应用知识与能力的证明,也是当前高职高专评估指标之一,因此,通过拿到计算机等级证书来促进学习,是我校对电脑应用水平测试加强电脑基础水平教学进行了探讨和研究后,对改进电脑基础操作教学提出的心的思路。