WDS技术在企业网中实现跨网远程部署的应用研究

随着计算机和网络技术的飞速发展,信息化建设越来越受到人们的重视,众多大中型企业纷纷利用企业网来管理部署所有的计算机,提高工作效率,提升管理水平,促进企业的快速发展。本文分析了大中型企业在部署大批量新计算机和重装客户端,以及批量管理计算机过程中存在的主要问题,通过利用WDS技术的特点和优势,实现企业网中跨网远程部署管理计算机,探索WDS技术在大中型企业网中的应用研究。     

一种远程自动安装中标麒麟操作系统的方法

随着软件国产化的逐步推进,中标麒麟操作系统获得了越来越广泛的应用。针对目前中标麒麟无法大批量自动安装的问题,首次提出了一种基于网络的远程安装方法。该方法通过在局域网上搭建系统安装服务器实现。系统安装服务器首先利用WOL技术远程唤醒待安装计算机,然后利用PXE技术自动启动安装过程,最后利用KickStart技术实现安装过程的自动交互。实际应用结果表明,利用该方法可以在30分钟内实现100台计算机的自动安装。     

高校公共网络机房系统维护效率探讨

针对高校公共机房软件维护的特点,讨论了PC机软件系统整体复制和应用软件批量安装的效率问题,给出了解决方法。实践表明,充分利用基于组播模式的数据传输技术可以大幅度节省网络复制的时间;灵活运用一些自动化脚本技术,也能够极大地提高软件的批量安装效率。     

新常态下计算机实验室硬件和软件管理方法分析

1.1软件与系统的批量安装在管理实验室机房上,软件与系统的安装工作非常必要。通常在实验室当中的计算机配置基本相同,为此,计算机在安装硬盘保护卡之后就可以安装大量的软件与系统,管理工作者仅仅需要将平时的教学软件和操作系统进行安装就行,再实施相应的管理设置,最后的时候进行测试就可以正常地应用,就能够以这台计算机作为核心,借助硬盘保护卡的在实验室的其它联网的计算机上进行复制。并且,倘若将来更新软件,那么也仅仅是拷贝出现改变的数据,进而能够适应教学软件的应用需要。     

用微软官方工具批量安装更新补丁

如果你没有激活自动更新而是习惯使用手工更新方式,那么在大多数情况下,我们每安装一个系统更新或补丁程序,都需要重新启动操作系统,其麻烦可想而知。现在,如果利用微软官方发布的QChain.exe工具,就可以在只重新启动一次的情况下批量安装。我们安装的更新程序越多,就越节省时间,这对于服务器来说是非常重要的,而且在Windows 2000、Windows NT 4.0上都可以运行。     

利用VB开发机房管理软件控制网络计算机硬盘分区的显示与隐藏

计算机网络技术的发展的简化了人们管理批量计算机的劳动量,通过网络来解决我们实际工作中出现的问题成为摆在每一个从事计算机管理人员的课题,本文就是解决公共机房批量计算机中的资料保密的问题。     

基于VB的远程唤醒软件的设计与实现

远程唤醒是通过向网卡发送特定数据包,实现计算机自动开启的技术.阐述了远程唤醒的原理,设计并实现了基于VB的远程唤醒软件.该软件能批量唤醒局域网中的计算机,从而提高计算机房的管理效率.     

利用虚拟机搭建Linux操作系统的实践环境

为了更好地让学生充分掌握网络安全技术课程,采用理论课与实践课相结合的教学模式.为了避免病毒攻击对机房主机产生危险,充分利用已有的计算机资源,利用虚拟机VMware软件在一台计算机上安装多个虚拟操作系统,搭建网络安全技术课程实践环境,不用对原有的计算机操作系统进行重装,提高了资源使用率.     

利用VB开发机房管理软件控制网络计算机硬盘分区的显示与隐藏

计算机网络技术的发展的简化了人们管理批量计算机的劳动量．通过网络来解决我们实际工作中出现的问题成为摆在每一个从事计算机管理人员的课题，本文就是解决公共机房批量计算机中的资料保密的问题。     

无盘系统在计算机实验室中的应用分析

计算机实验室一直是学生学习计算机知识的重要场所,为让学生们的学习得以顺利开展,正确地管理计算机实验室成为当前各大学校的工作重点.然而,在计算机实验室的管理中,计算机的软件安装,系统升级维护等一系列工作非常繁杂,为解决这一问题,可以采用操作简单的无盘系统并将其运用在日常的维护中.无盘系统作为网络技术的一个重要分支,拥有简单、易上手的特点,这一特性能够降低计算机软件的安装、升级、与维护成本,让计算机实验室可以真正成为学生学习的好去处.     

The application of IT in organisations: Some trends and issues

Abstract

This paper describes some trends and issues in the application of information technology in organisations. Technology trends are outlined in the areas of computing power, telecommunications, networking, software and standards. Some trends in the applications of IT are described with respect to developments in information systems and office automation. Some differences in the likely role of IT in the industrialised and developing countries are discussed. The second half of the paper deals with issues in the management of IT applications in organisations, and issues are identified as being political, organisational and social in nature in addition to technical. A social systems framework is proposed for the analysis of these issues. Some specific IT issues are then discussed involving alternative stakeholder perspectives, the analysis of decision making processes, the process of consultation and communication and the organisational impacts of IT applications.     

Combined effects of fabric air permeability and moisture absorption on clothing microclimate and subjective sensation during intermittent exercise at 27 degrees C.

The present paper aimed at determining the combined effects of two different levels of air permeability and moisture absorption, in terms of clothing microclimate and subjective sensation, in resting and exercising subjects at an ambient temperature of 27 degrees C, a relative humidity of 50% and an air velocity of 0.14 m s-1. Three kinds of clothing ensemble were investigated: (1) polyester clothing with low moisture absorption and low air permeability (A), (2) polyester clothing with low moisture absorption and high air permeability (B), and (3) cotton clothing with high moisture absorption and high air permeability (C). The subjects exercised for 10 min on a cycle ergometer at an intensity of 30% maximal oxygen uptake and then had a 10 min rest. This sequence was repeated four times. The main findings are summarized as follows: (1) The clothing microclimate humidity in the back area was significantly higher in A than in B, and in C than in B. (2) The clothing microclimate temperature in the chest area was significantly higher in B than in A, and in B than in C. (3) The clothing microclimate temperature in the back area was significantly higher in C than in B. (4) The clothing surface temperature was significantly higher in C than in B. (5) Although the positive relationships between the microclimate humidity and forearm sweat rate was significantly confirmed in all three kinds of clothing, the microclimate humidity at chest for the same sweat rate was lower in C than in A and B. (6) Although the positive relationships between subjective sensation and forearm sweat rates were significantly confirmed in all three kinds of clothing, the subjective discomfort seemed to be reduced more effectively in C than in A and B for the same sweat rate. These results were discussed in terms of thermal physiology and combined effects of air permeability and moisture absorbency of the fabrics.     

Modelling long-memory volatilities with leverage effect: A-LMSV versus FIEGARCH

A new stochastic volatility model, called A-LMSV, is proposed to cope simultaneously with leverage effect and long-memory in volatility. Its statistical properties are derived and compared with the properties of the FIEGARCH model. It is shown that the dependence of the autocorrelations of squares on the parameters measuring the asymmetry and the persistence is different in both models. The kurtosis and autocorrelations of squares do not depend on the asymmetry in the A-LMSV model while they increase with the asymmetry in the FIEGARCH model. Furthermore, the autocorrelations of squares increase with the persistence in the A-LMSV model and decrease in the FIEGARCH model. On the other hand, if the correlation between returns and future volatilities is negative, the autocorrelations of absolute returns increase with the magnitude of the asymmetry in the FIEGARCH model while they decrease in the A-LMSV model. Finally, the cross-correlations between squares and original observations are, in general, larger in absolute value in the FIEGARCH model than in the A-LMSV model. The results are illustrated by fitting both models to represent the dynamic evolution of volatilities of daily returns of the S&P500 and DAX indexes.     

Contour tracking on ultrasound sequences of vascular images

Simple vascular measurements on sequences of echographic images can be used to quantify important indexes of cardiovascular risk. The measurement of the intima-media thickness and the characterization of the endothelial function are but two examples. Real-time image processing systems would be helpful to automatically track, locate, and discriminate vascular structures through image sequences. Many algorithms have been developed to accomplish this task and they are generally based on the application of a mathematical operator at the points of a starting contour and on an iterative procedure that brings the starting contour to the final contour. In this paper, the performances of a mathematical operator that exploits both temporal and spatial information are compared to those of an operator that only exploits spatial information. The paper shows that, in general, when tracking contours on image sequences and when two or more gray-level discontinuities are present and close to each other, as in the case of arteries, both operators should be used in sequence. The text was submitted by the authors in English. Marcello Demi was born in Cecina, Italy, in 1956. He graduated in Electronic Engineering from the University of Florence, Italy in 1985. He is currently head of the Computer Vision Group at the CNR Institute of Clinical Physiology in Pisa and he teaches a course on Medical Image Processing at the faculty of Applied Physics, University of Pisa. His research interests are image processing systems and filtering schemes inspired by the early stages of biological vision systems. He has 80 scientific publications and his objective is the development of common projects with people who work in the area of biological vision for the purpose of both understanding biological vision and developing image processing systems. Elisabetta Bianchini was born in Lucca, Italy, in 1975. She received the degree in Electronic Engineering from the University of Pisa, Italy, in 2004. Since 2004 she is junior research at CNR, the Italian National Research Council, at the DSP lab in IFC (Institute of Clinical Physiology). Her field of interest is image processing and in particular development of methods for the assessment of indices of cardiovascular risk from ultrasound images. She is author or co-author of 14 scientific publications in international journals and conference proceedings. Francesco Faita was born in 1973 in La Spezia (Italy). In 2001 he graduated from Università degli Studi di Pisa obtaining the degree of Electronic Engineer. Since 2001, he has been working as a research fellow at the Institute of Clinical Physiology of the Italian National Research Council. His main research interests lie in Computer Vision, in particular in the field of ultrasound image motion estimation. A major focus of his research in the last years has been development of clinically applicable automated techniques for cardiovascular analysis and prediction of disease progression. He is author or co-author of 58 scientific publications in international journals and conference proceedings. Viencenzo Gemignani was born in 1969, in Viareggio (Italy). In 1995, he graduated in Electronic Engineering from the University of Pisa. Since 1996, he has been working at the Institute of Clinical Physiology of the Italian National Research Council. His main research interests are in diagnostic ultrasound, realtime image analysis and non-invasive patient monitoring systems. He teaches a course on DSP processors at the Faculty of Engineering, University of Pisa. He is author or coauthor of 40 scientific publications in international journals and conference proceedings and is co-inventor of 4 patents in the field of ultrasonic image processing.     

Evolution of Emergency Management in Malaysia

Various types of disaster ranging from biological, structural collapse, fire and explosion, landslides and meteorological incidents have struck Malaysia. Safety and emergency laws and regulations in Malaysia had evolved in pace with the development and industrialisation of the country. Some of these disasters were land‐marked disasters whereby various safety and emergency acts and regulations were amended or introduced. In this article, the history of the evolution of various Safety and Emergency Laws, Regulations and Acts in the country since independence in 1957 until the establishment of the Permanent Guidelines for Disaster Management and Relief Operations in 1997 is presented. Lessons from past disasters and the rapid expansion of industrialisation have greatly influenced the evolution of safety and emergency management in Malaysia. However, this intermediary phase in the pursuit of development is often accompanied by an increase in vulnerability (McEntire, 1997). This paper discusses reasons that are attributed to the increase in vulnerability as well as the challenges faced by the nation in the area of safety and emergency planning.     

Sociomaterial actors in the assimilation gap: a case study of web service, management and IT-assimilation

This paper investigates the conditions for the assimilation of information systems (IS) and information technology (IT) in organizations and the influence of various actors in the organization and eBusiness context. To do so it draws on the literature on assimilation gap, sociomateriality and infrastructure together with a study of implementation and use of information and communication technology in and among organizations in a Swedish region. There were substantial investments in web infrastructure made on a regional level and the focus of this study is how the investments were transformed and assimilated in practices, relations and communication. Based on the empirical data from the case study, the paper extends the assimilation process into interplay among actors in organizations contexts. It describes organizations’ strategies for coping with their needs for information and the actors in these processes. Two categories of actors are identified, sensemaking and sensegiving actors, as most important in assimilation of IS/IT in organizations. A sociomaterial perspective gives guidance and a better understanding of the assimilation process in terms of knowledge and interpretative frames, and how assimilation involves identity construction and negotiations among sensemaking and sensegiving actors. The contribution of this paper is a better understanding of the context of assimilation and adaptation of IT in organizations’ business processes, and steps to be taken to improve readiness.     

Computer networks and interfirm relationships in the automobile industry: A comparative study of Japan and Korea

This paper presents the results of comparative research between the Japanese and Korean automobile industries through empirical research on applications in the interfirm network and the effects on management. Almost all Japanese automobile parts suppliers installed an interfirm network in the latter half of the 1980s. In the case of Korea, it was in the middle 1990s. The type of interfirm networks both in Japan and Korea are vertical networks in which the assembler takes leadership for the construction and maintenance of their interfirm network. The kind of interchanged data on the network reflects the interfirm relationship between the assembler and the parts suppliers. Data in the design and technology field are interchanged via the interfirm network more in Japan than in Korea. This result demonstrates that the assembler and the parts suppliers have a closer relationship, such as “design-in”, in Japan than in Korea.     

Adaptive solutions to the mutual exclusion problem

Summary Algorithms for mutual exclusion that adapt to the current degree of contention are developed. Afilter and a leader election algorithm form the basic building blocks. The algorithms achieve system response times that are independent of the total number of processes and governed instead by the current degree of contention. The final algorithm achieves a constant amortized system response time. Manhoi Choy was born in 1967 in Hong Kong. He received his B.Sc. in Electrical and Electronic Engineerings from the University of Hong Kong in 1989, and his M.Sc. in Computer Science from the University of California at Santa Barbara in 1991. Currently, he is working on his Ph.D. in Computer Science at the University of California at Santa Barbara. His research interests are in the areas of parallel and distributed systems, and distributed algorithms. Ambuj K. Singh is an Assistant Professor in the Department of Computer Science at the University of California, Santa Barbara. He received a Ph.D. in Computer Science from the University of Texas at Austin in 1989, an M.S. in Computer Science from Iowa State University in 1984, and a B.Tech. from the Indian Institute of Technology at Kharagpur in 1982. His research interests are in the areas of adaptive resource allocation, concurrent program development, and distributed shared memory.A preliminary version of the paper appeared in the 12th Annual ACM Symposium on Principles of Distributed ComputingWork supported in part by NSF grants CCR-9008628 and CCR-9223094     

Methods of system development in Finland

Interest in the use of different methodologies, methods and tools for information systems analysis and design has been increasing for the last decade in Finland. This has resulted in the founding of a special interest group in systems analysis and design within the Finnish Data Procesing Association and in its making a survey of the methods and tools in use in Finland in 1980. This survey was in the form of a questionnaire mailed to the company members of the association. The results of the survey show a wide use of different tools in the design and implementation of information systems. In the analysis phase, there seems to be a need for more and better methods and tools. In 1980 several companies began to use new methodologies, methods and tools in the field; the most common are: the Swedish ISAC, Jackson's JSP, and the data dictionary.     

Crisis Management and Strategic Orientation in Small and Medium‐Sized Enterprises (SMEs) in Peru,Mexico and the United States

This study addresses the link between management concern for organizational crises and competitive strategy in small and medium‐sized enterprises in Peru, Mexico and the United States. Surveys were completed by 270 Peruvian, 218 Mexican and 256 American managers. Strategic orientation in Peru did not mirror the broad pattern found in Mexico and in the United States. Levels of concern for crises were significantly higher in both Mexico and Peru than in the United States for 12 of 21 crises. The level of concern for crises tended to increase with management level more in Mexico and Peru than in the United States. Correlations between competitive strategy and crisis concern were significant in 26 of 126 instances.