1,723,348 research outputs found
Cook, S G, 260335
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/378478Surname: COOK
Given Name(s) or Initials: S G
Military Service Number or Last Known Location: 260335
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 54992192291
Item: [2016.0049.10772] "Cook, S G, 260335
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Active filter techniques in data processing systems
No full textThis thesis describes work carried out over the period October 1970 to June 1975. The work described concentrates on the definition and solution of the filtering problems which are raised in two processing systems. These are, a real-time channel estimation system for improving the efficiency of high frequency (3-30MHs) radio links, and a compatible data modem. The generation and demodulation of signals in the modem is considered in detail with a full error performance analysis. Particular consideration is given to the choice of optimum filter parameters in a practical system. Variation of these parameters to obtain the best compatibility between the modem and estimation system is also considered with a presentation of the corresponding error mapping results. Methods of obtaining the required filter characteristics are outlined with a detailed examination of a non-minimum phase approximation technique and the corresponding transfer function, synthesis alternatives. Two different types of practical filters based on this design procedure are described. The first uses filter sections based on a modified Sallen and Key arrangement and is analysed with regard to non-ideal components and temperature stability. Results are reported for two representative data modem filters using this arrangement. A more stable configuration is described using ladder filters where the inductive elements are replaced by their gyrator equivalents. The development of a suitable gyrator, using a single operational amplifier is described. The design of a narrow band-width filter suitable for the estimation system is considered, using minimum-phase approximations. A numerical design procedure for a specific output-noise autocovariance is described and to the selection of a suitable m+n+m++m-phase approximation. The design and construction of the filter is considered and practical results reported.</p
Cook, S S (Sydney Stephen), VX65365
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/378554Surname: COOK
Given Name(s) or Initials: S S (SYDNEY STEPHEN)
Military Service Number or Last Known Location: VX65365
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 38796192367
Item: [2016.0049.10848] "Cook, S S (Sydney Stephen), VX65365
- …
