Thesis (M.S.)--Rochester Institute of Technology, 1986. / Typescript. Includes bibliographical references (leaves 71-72).

Thesis (D.A.)--Illinois State University, 1992. / Title from title page screen, viewed January 25, 2006. Dissertation Committee: Douglas D. Hesse (chair), James R. Kalmbach, Janice G. Neuleib, Anne Rosenthal. Includes bibliographical references (leaves 194-202) and abstract. Also available in print.

Thesis (M.Ed.)--University of Alberta, 1997. / In partial fulfillment of the requirements for the degree of Master of Education in Counselling Psychology. Department of Educational Psychology. Also available online.

Different computer systems have their own ways of representing, storing and managing files. One approach to facilitate file transfers among systems in a heterogeneous networked environment is for each system to locally map files for transfer onto a virtual filestore (VFS). Conceptually, a virtual filestore provides a universal model for describing files and how they can be manipulated. The ISO File Transfer, Access and Management (FTAM) protocol offers one such virtual filestore model. This thesis reports on the prototype implementation of a useful subset of the ISO FTAM protocol for the UNIX 4.2 BSD¹ file system. We call this implementation ubcFTAM. UNIX files, ordinarily regarded as unstructured, can be endowed with some internal structure thereby allowing the transfer of selective portions of a file. Furthermore, the implementation offers several file attributes not supported by UNIX. ubcFTAM runs on several Sun Workstations² interconnected by a 10 Mbps Ethernet. Some performance data of ubcFTAM are also presented. This thesis also identifies several aspects of the specifications that are ambiguous or that are inadequate, warranting further studies. Resolutions for these issues are discussed. We hope this experience will be useful to others planning to implement FTAM for UNIX systems. ¹UNIX is a registered trademark of American Telephone and Telegraph Bell Laboratories. BSD denotes Berkeley Standard Distribution ²SUN Workstation is a trademark of Sun Microsystems, Inc. / Science, Faculty of / Computer Science, Department of / Graduate

No description available.

Given a transfer function for a differential equation model, an approach for obtaining a solution is by way of bilinear transformation. The bilinear transform approach is a numerical integration scheme which gives a discrete approximation to the differential equation solution. BILIN applies a series of polynomial transformations to the transfer function H(s). As a result, H(s) is mapped into the complex z plane obtaining the discrete transfer function H(z). From H(z), the difference equation is obtained whose solution y(nT) approximates the actual differential solution y(t). Hence, BILIN provides a means for obtaining discrete transfer functions for the design of digital filters and/or solving linear time-invariant differential equations.

Note:

General-purpose multi-access computing systems with files stored on random-access devices require that these files be protected. If the total on-line storage is inadequate there is a need for wellorganized off-line storage. This thesis discusses the management problems involved in handling backup and archive copies of files. In Part I we review what a number of systems, including the Edinburgh Multi-Access System (EMAS), have achieved. We also consider the influences of hardware and other forms of computing system. In Part II we return to EMAS and propose a design and an implementation to provide comprehensive facilities, for backup copies of files and recovery of them, and also for archive storage.

Typescript (photocopy). / Digitized by Kansas Correctional Industries / Department: Computer Science.

A system is developed which facilitates communication between a Personal Computer and a Mainframe, and can do both directions, and lets the user execute Unix shell commands while the file transfer is in process. This communication system consists of two programs, one named "Thesis.EXE" that runs on a DOS based machine, and one named named "COMMGREEK" that runs on a Unix based machine. / Department of Computer Science