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INFORMATION AND COMPUTER SECURITY 2016年第3期24卷 242-254页

作者： Shumilov, Artem Philippovich, Andrey Moscow State Engn Univ Res & Educ Ctr Infocognit Technol Moscow Russia

Purpose - This paper aims to describe the development of a new experimental CAPTCHA (completely automated public turing test to tell computers and humans apart), which is supposed to provide better protection against spam bots compared to the existing captcha solutions. Design/methodology/approach - In the new CAPTCHA, the authors are using animated images of hand gestures to represent letters and numbers. A lot of people use sign language as their primary means of communication, but an automatic algorithm able to reliably recognize such gestures from videos without any additional data has yet to be developed. Findings - The experiment showed that at first, it takes time for people who do not use sign languages in their everyday lives to adapt to the new CAPTCHA, but after several successful recognitions, they have no more trouble with it than with a typical captcha implementation. Originality/value - The paper shows that people with little to no knowledge of sign languages can still recognize gestures on video relatively fast. Therefore, a gesture-based implementation can be used not only on websites aimed at sign language speakers but also as a general-purpose captcha service.

关键词： Innovation Computer security Access control client-server computing

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Developing and using a facilities planning guide

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Facilities 1996年第10-11期14卷 39-39页

作者： Thatcher, G. Graham, J. (Carroll Thatcher Planning Group Ottawa Ontario Canada) (Carroll Thatcher Planning Group Ottawa Ontario Canada)

The Canadian federal department of Human Resources Development Canada required a Facilities Planning Guide to support the re-engineered national Income Security Program. The challenge was to produce a guide to address a widely varied audience in regions across Canada, to satisfy a range of stakeholders - and to do it in 60 days in two languages.

关键词： Canada client-server computing Computer facilities management Service delivery systems

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Designing and implementing software for spatial statistical analysis in a GIS environment

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Journal of Geographical Systems 2000年第3期2卷 257-286页

作者： Haining, R. Wise, S. Ma, J. Department of Geography Sheffield Centre for Geog. Info. University of Sheffield Sheffield United Kingdom

This paper provides a description of SAGE, a software package linked to the Arc/Info GIS that can be used to undertake spatial statistical analysis of area based data. The paper is written from the perspective of the user who wishes to undertake exploratory and confirmatory spatial data analysis. The paper discusses design aspects of the package and also the statistical analysis philosophy underlying its contents. The paper describes the statistical analyses which SAGE can perform and details on how it performs them together with some illustrative examples. Detail on visualisation aspects of SAGE are discussed in a separate paper (Haining et al. 2000). The wider contribution of the paper is to build on earlier developments in this area and identify the needs of software packages if they are to enable users to implement effective spatial statistical analysis.

关键词： Autocorrelation Brushing client-server computing Exploratory analysis Regionalisation Spatial regressions Visualisation

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Managing platform conversion in educational institutions

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International Journal of Educational Management 1998年第5期12卷 225-231页

作者： Reisman, Sorel Dear, Roger G. California State University Fullerton CA United States

This paper describes a re-engineering project undertaken by a comprehensive university's extended education department. The project involved a transition from a decentralized workplace dominated by Macintosh personal computers to an IBM PC/clone-based client/server environment. Lessons learned during the decision making and platform conversion stages of the project are emphasized. These lessons are applicable to other similar re-engineering projects. © MCB UP Ltd.

关键词： BPR client-server computing Information technology

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BRICKNET - SHARING OBJECT BEHAVIORS ON THE NET

BRICKNET - SHARING OBJECT BEHAVIORS ON THE NET

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Virtual Reality Annual International Symposium 95 (VRAIS 95)

作者： SINGH, G SERRA, L PNG, W WONG, A NG, H NATL UNIV SINGAPORE INST SYST SCISINGAPORE 0511SINGAPORE

ISBN: (纸本)0818670843

In a majority of networked virtual worlds, object sharing is limited to object geometries only. The BrickNet toolkit extends the sharing of objects to include dynamic object behaviors. This is achieved by combining a structured organizational paradigm for virtual worlds with an interpreted language. Sharing in virtual worlds is handled by transferring the program code that builds the structure and executes the behavior. The range of behaviors that can be shared in BrickNet include simple behaviors, virtual world dependent behaviors, reactive behaviors and capability-based behaviors.

关键词： VIRTUAL REALITY NETWORK-BASED VIRTUAL WORLDS client-server computing OBJECT MANAGEMENT

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Pro SQL server Disaster Recovery 1st ed.

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丛书名： Expert's voice in SQL server

2008年

作者： James Luetkehoelter

ISBN: (数字)9781430206019

ISBN: (纸本)9781590599679

Many would argue that the single, most important job of a SQL server database administrator is to be able to recover your database in the event of loss or damage. Pro SQL server Disaster Recovery helps you meet that goal by showing you how to think about and plan for potential problems. Youll learn to anticipate and reduce the likelihood of a disaster, and to mitigate the effects of a disaster when one does occur. Perhaps most importantly, youll learn how to prepare so that you can return a system to its normal state quickly, ensuring system availability and the continued success and operation of your business. Many SQL server features and technologies are, or can be put to good use in disaster recovery planning. In this book, youll learn about powerful tools and features such as Database Snapshots and Mirroring for data backup and disaster recovery that are present in SQL server 2005, and that are enhanced in SQL server 2008. Also covered are common issues to expect when using these features. This book explores your options by examining the technical details of disaster recovery features and then applying that knowledge to practical scenarios. Theres a human side to disaster recovery planning as well. Like few other activities, disaster recovery planning requires that you work closely with a wide variety of people from all across your organization. People skills are as critical to disaster recovery planning as technical skills, and perhaps more so. This book does not leave you in the dark, but provides sound advice on how to keep disaster recovery planning projects on track, how to avoid dangerous scope creep, and how to work effectively with the variety of personality types that you will encounter. Disaster recovery planning is really about sleep. When you get the call at 3:00 am that your database is lost, dont wake up with that icy feeling in your veins. Instead wake up with confidence that you have a plan in place, a plan that youve practiced, that management h

关键词： Database Administration Management client-server computing

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Pro SQL server 2008 XML 1st ed.

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丛书名： The expert's voice in SQL server

2008年

作者： Michael Coles

ISBN: (数字)9781430206309

ISBN: (纸本)9781590599839

Knowledge and ability to apply XML are de rigueur in todays world, and SQL server developers and administrators are no exception to that rule. Pro SQL server 2008 XML is your key to unlocking the powerful XML feature set first introduced in SQL server 2005 and since refined in SQL server 2008. Author Michael Coles shows how to store XML using SQL servers builtin XML data type. Learn to query and manipulate XML data using standard technologies such as XQuery and XSLT. No SQL server database professional can afford to be without knowledge of the XML feature set. Pro SQL server 2008 XML delivers on the knowledge that you need to remain competitive in your career. Shows how to store, query, and manipulate XML documents in SQL server Provides stepbystep examples showing best practices and advanced features Accurately discusses how SQL servers XML feature set stacks up against the ISO XML standards What youll learn Store XML documents using SQL servers builtin XML data type. Query those stored documents using SQL/XML and XQuery. Manipulate and transform XML using XSLT and XPath. Understand how SQL servers XML support compares to the ISO XML standards. Create SOAP endpoints for use in web services applications. Create primary and secondary XML indexes to improve performance of XML queries. Who is this book for? SQL server SQL/TSQL developers and .NET developers who want to take advantage of the specific serverside XML functionality available in SQL server 2008 About the Apress Pro Series The Apress Pro series books are practical, professional tutorials to keep you on and moving up the professional ladder. You have gotten the job, now you need to hone your skills in these tough competitive times. The Apress Pro series expands your skills and expertise in exactly the areas you need. Master the content of a Pro book, and you will always be able to get the job done in a professional development project. Written by experts in their field, Pro series books from Apress give you t

关键词： SQL server Network Programming XML SGML Other Document Mark-up Languages Web Programming client-server computing

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Pro .NET 1.1 Remoting, Reflection, and Threading 1st ed.

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丛书名： The expert's voice in .NET

2005年

作者： Syed Fahad Gilani Jonathan Pinnock James Hart Benny K. Mathew Geir Olsen Robin Pars Fabio Claudio Ferracchiati Tobin Titus Tejaswi Redkar Srinivasa Sivakumar Sandra Gopikrishna David Curran Mike Gillespie

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A wireless cache adaptive invalidation algorithm in connection and reconnection periods

A wireless cache adaptive invalidation algorithm in connecti...

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International Conference on Computer Engineering and Systems (ICCES 06)

作者： El-Desouky, Ali I. Ali, Hesham A. El-Shafaiy, Engy A. Mansoura Univ Fac Engn Comp & Syst Dept Mansoura Egypt

ISBN: (纸本)9781424402717

The basic cache consistency strategy is the use of periodic invalidation reports (IRs) broadcast by the server. Recently, the addition of updated invalidation reports (UIR) has been proposed. The IR+UIR scheme achieves a much shorter query delay than the. basic IR scheme. Previous researches were based on two impractical simplifying assumptions: 1) broadcast traffic is error-free and 2) no other downlink traffic exists in the system. IR partitioning reconstruction lifts these two assumptions on the basic IR and IR+UIR. The (IR partitioning, reconstruction) achieves the following 1) reduces the probability of corruption in IR, 2) improves channel utilization, 3) reduces the average delay in other downlink, traffic. However, there are still some drawbacks. One of the drawbacks is the problem with long disconnection. The major contribution for this paper is to propose an adaptive cache invalidation report in the server either broadcasting invalidation reports segments (IRseg+UIR) or bit sequences (BSs) based on the client disconnection time while spending little uplink and downlink cost. Simulation results have shown, and minimized query delay and data packet delay and improved the number of uplink per successful query using the proposed algorithm.

关键词： cache invalidation invalidation report (IR) link adaptation channel adaptive protocols wireless networks client-server computing

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Active replication and update of content in electronic commerce

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INTERNATIONAL JOURNAL OF ELECTRONIC COMMERCE 2000年第3期4卷 45-67页

作者： Chaturvedi, AR Choubey, AK Roan, J Purdue Univ Krannert Grad Sch Management SEAS Lab W Lafayette IN 47907 USA

This paper describes a strategy for actively replicating and updating content for electronic commerce. Active replication and updating of content is achieved by intelligent agents (IA) using a time-invariant fragmentation approach to partitioning and replicating data in a distributed computing environment. Taking into account the time-sensitivity property of data, IAs derive time-invariant fragments for their respective nodes from the query history. A time-invariant fragment (TIF) is that portion of the database whose values do not change during a specified time interval. The algorithm that IAs use in creating TIFs for each node, for a given time interval, is presented. The active replication approach is compared with three other approaches, Full-replication, nonreplication, and materialized view, in terms of data transmission costs. Results indicate that the active approach can be most effective for electronic commerce because of the high percentage of modification queries, the large sire of the network, and the greet number of transactions.

关键词： client-server computing distributed systems electronic commerce intelligent agents

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