-
Lazinger, S.S.; Peritz, B.C.: Reader use of a nationwide research library network : local OPAC vs. remote files (1991)
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- Abstract
- The primary objective of the present study was to exmine whether readers conducting bibliographic searches in ALEPH - Israel's research library network - tend to search only within the OPAC of the library within which they are working or whether they access the remote OPACs of other libraries. The ALEPH network has a dezentralized database. Therefore, it was possible to examine this question because each library has its own access code and each database can be searched separately. The data were collected by means of a one-page questionnaire lefr beside each terminal in the library of the Graduate School of Library and Archive Studies of the Hebrew University of Jerusalem during an entire academic years. results of analysis of the data collected in this survey are presented in 6 tables
- Date
- 22. 2.1999 13:06:18
- Source
- Information technology and libraries. 10(1991), S.192-200
-
Buxton, A.B.: International gateways (1991)
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- Abstract
- Describes types of international gateways available for online searching. Public data networks are provided by national telecommunications authorities. Private data networks are run by an organization for its own use, or for customers of its services. Academic data networks are a special case of private networks which serve the the academic and research communications. Gives details of a number of academic networks: JANET, BITNET, NETNORTH, EARN, Internet. Describes the gateways between JANET and the UK public data network, EARN and Internet. Describes the international X.25 infrastructure (IXI) network which is organized by COSINE (Cooperation for OSI networking in Europe) programme which aims to provide OSI-based services for European researchers
- Source
- Standards for the international exchange of bibliographic information: papers presented at a course held at the School of Library, Archive and Information Studies, University College, London, 3-18 August 1990. Ed.: I.C. McIlwaine
-
Lynch, C.A.: ¬The Z39.50 information retrieval standard : part I: a strategic view of its past, present and future (1997)
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- Abstract
- The Z39.50 standard for information retrieval is important from a number of perspectives. While still not widely known within the computer networking community, it is a mature standard that represents the culmination of two decades of thinking and debate about how information retrieval functions can be modeled, standardized, and implemented in a distributed systems environment. And - importantly -- it has been tested through substantial deployment experience. Z39.50 is one of the few examples we have to date of a protocol that actually goes beyond codifying mechanism and moves into the area of standardizing shared semantic knowledge. The extent to which this should be a goal of the protocol has been an ongoing source of controversy and tension within the developer community, and differing views on this issue can be seen both in the standard itself and the way that it is used in practice. Given the growing emphasis on issues such as "semantic interoperability" as part of the research agenda for digital libraries (see Clifford A. Lynch and Hector Garcia-Molina. Interoperability, Scaling, and the Digital Libraries Research Agenda, Report on the May 18-19, 1995 IITA Libraries Workshop, <http://www- diglib.stanford.edu/diglib/pub/reports/iita-dlw/main.html>), the insights gained by the Z39.50 community into the complex interactions among various definitions of semantics and interoperability are particularly relevant. The development process for the Z39.50 standard is also of interest in its own right. Its history, dating back to the 1970s, spans a period that saw the eclipse of formal standards-making agencies by groups such as the Internet Engineering Task Force (IETF) and informal standards development consortia. Moreover, in order to achieve meaningful implementation, Z39.50 had to move beyond its origins in the OSI debacle of the 1980s. Z39.50 has also been, to some extent, a victim of its own success -- or at least promise. Recent versions of the standard are highly extensible, and the consensus process of standards development has made it hospitable to an ever-growing set of new communities and requirements. As this process of extension has proceeded, it has become ever less clear what the appropriate scope and boundaries of the protocol should be, and what expectations one should have of practical interoperability among implementations of the standard. Z39.50 thus offers an excellent case study of the problems involved in managing the evolution of a standard over time. It may well offer useful lessons for the future of other standards such as HTTP and HTML, which seem to be facing some of the same issues.
-
Millsap, L.; Ferl, T.E.: Search patterns of remote users : an analysis of OPAC transaction logs (1993)
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- Abstract
- The focus of this study is the search behavior of remote users of the University of California MELVYL Library System, an OPAC. Transaction logs from randomly selected remote user search sessions are analyzed. Descriptive data on the number and type of searches, choice of search mode and database, number of retrievals, number and type of errors, and use of system HELP facilities are presented. The search data have been cross-tabulated with demographic data on the same group of remote users, collected through an online survey conducted by the authors. Effectiveness of system usage is discussed. A case mode is made for the desirability of additional heuristics in the catalog portion of the system
- Source
- Information technology and libraries. 12(1993) no.3, S.321-343
-
Ferl, T.E.; Millsap, L.: Remote use of the University of California MELVYL Library System : an online survey (1992)
0.02
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- Abstract
- This report presents the results of a survey of users who access the University of California's online union catalog, the MELVYL library system, via microcomputers with modems or connections carried through local or wide area networks. The report includes descriptive statistics on user location, status, subject interest, affiliation, in-library versus out-of-library usage patterns, need for assistance, and desire for new features
- Source
- Information technology and libraries. 11(1992) no.3, S.285-303
-
Machovec, G.S.: Administrative considerations in establishing remote dial-in access to an online catalog (1988)
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- Source
- Online libraries and microcomputers. 6(1988), S.1-5
-
Stovel, L.; Fuchs, R.; Chang, J.-W.: RLG's Z39.50 server : development and implementation issues (1993)
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- Source
- Information technology and libraries. 12(1993) no.2, S.227-230
-
Carson, S.M.; Freivalds, D.I.: Z39.50 and LIAS : Penn State's experience (1993)
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- Source
- Information technology and libraries. 12(1993) no.2, S.230-237
-
Reddy, E.R.; Pradeep, C.: Internet and Z39.50 : a virtual union catalog (1999)
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- Source
- CALIBER 99: Academic libraries in the Internet: Proceedings of the 6th National Convention for Automation of Libraries in Education and Research, Nagpur, India, 18.-20.2.1999. Ed. by P.S.G. Kumar and C.P. Vahishth
-
Fitzwater, D.; Fragkin, B.; Birttain, W.: Remote use of CD-ROM (1991)
0.01
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- Abstract
- CD-ROM databases are finding a permanent niche in libraries and librarians are trained both to use each new product and to keep abreast of changes in them. From the library user point of view it is possible to dial into or remotely access CD-ROM databases. Discusses the use of the communications software pcAnywhere, examines the benefits to users and libraries of remote access, and lists other areas which might be of interest to learning resource centres in regard to CD-ROM services
- Source
- Community and junior college libraries. 7(1991) no.2, S.55-58
-
Lucas, T.A.: Time patterns in remote OPAC use (1993)
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- Abstract
- Expanded hours of access and the reduction of peak system loads are often cited as advantages of remote access to OPACs. This argument is based on the assumption that remote users search OPACs when libraries are closed or when there is low internal use. The study tested this assumption by performing a transactional log analysis of the remote and internal use of the OPAC at the Research Libraries of the New York Public Library. Analysis showed that pateerns of remote and internal use differed greatly. A large part of the remote searching occured when the Research Libraries were closed. Compared to internal searching, remote searching was distributed more evenly over the course of the day and the week. Results show that remote access expands the hours of use of the Online catalogue and has potential to reduce peak system loads at the Research Libraries
- Source
- College and research libraries. 54(1993) no.5, S.439-445
-
Ciardhuain, S.O.: Developments in networked bibliographic catalogues (1994)
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- Abstract
- Computer and communications technology is having a profound impact on libraries and the way in which they serve their users. Discusses online catalogues in libraries, the development of the Internet and OSI, and the development of search and retrieve (SR) protocols to allow standardized access to library catalogues across communications networks. Considers the deployment of SR protocols, problems with interoperability of clients and servers, interlibrary loan possibilities of SR protocols, and the feasibility of electronic document delivery
-
Joy, F.; Murray, R.: ¬The World-Wide Web and Z39.50 : which way for libraries? (1995)
0.01
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- Abstract
- The function of the W3, like that of Z39.50, is to offer access to networked information, and they appear to have similar client/server architectures. However, libraries need both because of the W3's lack of support for the advanced search, retrieval and management facilities that are expected of modern OPACs and are offered by Z39.50. Current research is involved in developing hybrid W3/Z39.50 services
-
Low, K.: ABCs of OPACs (1994)
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- Abstract
- Looks at the services offered by academic OPACs. Describes the services provided by Harvard Online Library Information System, University of California MELVYL Catalog, Stanford University' SOCRATES, and Princeton University Library. Many libraries now offer dial-up and/or Internet access to their OPACs
-
Sandfaer, M.: Remote public access : the true test of the OPAC as a front-end of library services (1991)
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- Abstract
- Describes the design of a front end enabling users to access a library's OPAC from locations remote from the physical libraries themselves. Current technological developments are renewed with reference to 10 years' experience of remote public access at the National Technical Library, Denmark
-
Burton, J.; Newport, J.; Robinson, E.: OPACs and JANET : a simple technique for easy user access (1989)
0.00
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- Abstract
- OPACs in an increasing number of libraries are now available using the Joint Academic Network (JANET). Access has tended to be obstructed, for the casual user, by the lengthy JANET addressing codes and varying log-on procedures required by each library system. Discribed how a communications and menu package on an IBK/PC can be used so that by merely pressing cursor control, return and escape keays, any user can gain access to any one of over 40 OPACs linked to JANET
-
Kock, M.d.: Remote users of an online public access catalogue (OPAC) (1993)
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- Abstract
- Networks allow different users from outside the library to have remote access to library catalogues. These remote users may face problems that differ from the OPAC users' in the library. They may not be comfortable with the computer technology and may not be familiar with the OPAC of the library. Libraries should offer different support services from those provided to on-site users. These users need technical advice as well as special instruction aids and guides to lead them to the information they want to retrieve
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Boss, R.W.: Client/server technology for libraries with a survey of vendor offerings (1994)
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Hinich, M.J.; Molyneux, R.E.: Predicting information flows in network traffic (2003)
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- Abstract
- Hinich and Molyneux review the literature of internet measurement and note three results consistently to be found in network traffic studies. These are "self-similarity," "long-range dependence," by which is meant that events in one time are correlated with events in a previous time and remain so through longer time periods than expected, and "heavy tails" by which they mean many small connections with low byte counts and a few long connections with large byte counts. The literature also suggests that conventional time series analysis is not helpful for network analysis. Using a single day's traffic at the Berkeley National Labs web server, cumulated TCP flows were collected, log transforms were used with the adding of .01 to all values allowing log transforms of the zero values, and providing a distribution that overcomes the heavy tail problem. However, Hinich's bicorrelation test for nonlinearity using overlapping moving windows found strong evidence of nonlinear structures. Time series analysis assumes linear systems theory and thus additivity and scalability. Spectral analysis should provide large peaks at the lowest frequencies if long range dependence is present since the power spectrum would go to infinity if the frequency goes to zero. This does not occur and so long range dependence must be questioned, at least until it is determined what effect other OSI layers may have on the TCP data.
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Sloan, B.G.: Remote access : design implications for the online catalog (1991)
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- Date
- 8. 1.2007 17:22:42
